Skocz do pozycji: 1.

Tytuł:

Antibacterial Activities of Some Schiff Bases Involving Thiosemicarbazide and Ketones

Autorzy:

Shariar, S. M. S.
Jesmin, M.
Ali, M. M.

Powiązania:

https://bibliotekanauki.pl/articles/412294.pdf

Data publikacji:

2014

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

antibacterial activity
Minimum inhibitory concentration
Brine shrimp lethality

Opis:

Three Schiff bases derived from thiosemicarbazide and ketones (Vanillin, Benzophenone and Acetophenone) were used to study their antibacterial activities against some pathogenic bacteria by disc diffusion method. Of these, benzophenone thiosemicarbazone showed significant antibacterial activity as compared with that of Kanamycin. All these three compounds were found to possess cytotoxic effect. Minimum inhibitory concentration of these compounds was also determined.

Źródło:

International Letters of Chemistry, Physics and Astronomy; 2014, 7; 53-61
2299-3843

Pojawia się w:

International Letters of Chemistry, Physics and Astronomy

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 2.

Tytuł:

Kinematic Analysis of 6-DOF Arms for H20 Mobile Robots and Labware Manipulation for Transportation in Life Science Labs

Autorzy:

Ali, M. M.
Liu, H.
Stoll, N.
Thurow, K.

Powiązania:

https://bibliotekanauki.pl/articles/384603.pdf

Data publikacji:

2016

Wydawca:

Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów

Tematy:

kinematic analysis 6-DOF robotic arm
validation of kinematic solution
labware localization
labware manipulation
Kinect sensor

Opis:

This paper presents the kinematic analysis of the H20 humanoid mobile robot. The kinematic analysis for the robot arms is essential to achieve accurate grasping and placing tasks for object transportation. The H20 robot has dual arms with 6 revolute joints with 6-DOF. For each arm, the forward kinematics is derived and the closed-form solution for the inverse kinematic problem with different cases of singularities is found. A reverse decoupling mechanism method is used to solve the inverse kinematic problem analytically by viewing the arm kinematic chain in reverse order. The kinematics solution is validated using MATLAB with robotics toolbox. A decision method is used to determine the optimal solution within multiple solutions of inverse kinematic depending on the joints’ limits and minimum joints motion. The workspace analysis of the arm is found and simulated. Finally, a verification process was performed on the real H20 arms by applying blind and vision based labware manipulation strategies to achieve the transportation tasks in real life science laboratories.

Źródło:

Journal of Automation Mobile Robotics and Intelligent Systems; 2016, 10, 4; 40-52
1897-8649
2080-2145

Pojawia się w:

Journal of Automation Mobile Robotics and Intelligent Systems

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 3.

Tytuł:

Integration of navigation, vision, and arm manipulation towards elevator operation for laboratory transportation system using mobile robots

Autorzy:

Abdulla, A. A.
Ali, M. M.
Stoll, N.
Thurow, K.

Powiązania:

https://bibliotekanauki.pl/articles/384579.pdf

Data publikacji:

2017

Wydawca:

Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów

Tematy:

mobile robot
multi-floor
elevator handler
floor estimation
labware transportation system
kinematic analysis
robotic arm control
object detection
localization
Intel Real sense F200 sensor

Opis:

In the automated environments, mobile robots play an important role to perform different tasks such as objects transportation and material handling. In this paper, a new method for a glassy elevator handling system based on H20 mobile robots is presented to connect distributed life science laboratories in multiple floors. Various labware and tube racks have to be transported to different workstations. Locating of elevator door, entry button detection, internal buttons recognition, robot arm manipulation, current floor estimation, and elevator door status checking are the main operations to realize a successful elevator handling system. The H20 mobile robot has dual arms where each arm consists of 6 revolute joints and a gripper. The gripper has two degrees of freedom. Different sensors have been employed with the robot to handle these operations such as Intel RealSense F200 vision sensor for entry and internal buttons detection with position estimation. A pressure sensor is used for current floor estimation inside the elevator. Also, an ultrasonic proximity distance sensor is utilized for checking the elevator door status. Different strategies including HSL color representation, adaptive binary threshold, optical character recognition, and FIR smoothing filter have been employed for the elevator operations. For pressing operation, a hand camera base and a new elevator finger model are designed. The elevator finger is resolved in a way to fit the arm gripper which is used also to manipulate the labware containers. The Kinematic solution is utilized for controlling the arms’ joints. A server/client socket architecture with TCP/IP command protocol is used for data exchange between Multi-Floor System and the H20 robot arms. Many experiments were conducted in life science laboratories to validate the developed systems. Experimental results prove an efficient performance with high success rate under different lightening condition.

Źródło:

Journal of Automation Mobile Robotics and Intelligent Systems; 2017, 11, 4; 34-50
1897-8649
2080-2145

Pojawia się w:

Journal of Automation Mobile Robotics and Intelligent Systems

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 4.

Tytuł:

Mobile robot transportation for multiple labware with hybrid pose correction in life science laboratories

Autorzy:

Ali, M. M.
Abdulla, A. A.
Stoll, N.
Thurow, K.

Powiązania:

https://bibliotekanauki.pl/articles/384665.pdf

Data publikacji:

2017

Wydawca:

Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów

Tematy:

robot position correction
multiple labware transportation
mobile robot localization
motor encoder
localization error handler
Kinect V2
grasping operation
placing operation
multi-floor

Opis:

In automated working environments, mobile robots can be used for different purposes such as material handling, domestic services, and objects transportation. This work presents a transportation process for multiple labware with hybrid pose correction in life science laboratories using H20 mobile robots. Multiple labware and tube racks, which contain chemical and biological components, have to be transported safely between laboratories on different floors of life science environment. Therefore, an accurate approach for labware transportation is required. The H20 robot has dual arms each consisting of 6 revolute joints with 6-DOF. The problem statement of robot positioning error in front of the workstation is presented. The navigation strategy with its related systems is presented for multi-floor mobile robot transportation environment. A Stargazer module is used as a stable and low-cost mapping and localization sensor with artificial landmarks. An error management system to overcome incorrect stargazer reading problems is presented. Different strategies of pose correction for mobile robots are described. The H20 robot is equipped with sonar sensors and Kinect V2 to be used for labware manipulation and position correction. The Kinect sensor V2 with SURF algorithm (Speeded-Up Robust Features) is used to recognize and localize the target. The communication procedure between the transportation platforms is done using client-server models.

Źródło:

Journal of Automation Mobile Robotics and Intelligent Systems; 2017, 11, 4; 51-64
1897-8649
2080-2145

Pojawia się w:

Journal of Automation Mobile Robotics and Intelligent Systems

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 5.

Tytuł:

Antibacterial Activities of Some Transition Metal Schiff Base Complexes

Autorzy:

Islam, M.N.
Shahriar, S.M.S.
Islam, M.K.
Jesmin, M.
Ali, M.M.
Khanam, J.A.

Powiązania:

https://bibliotekanauki.pl/articles/411780.pdf

Data publikacji:

2013

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

antibacterial activity
Schiff base transition metal complexes
minimum inhibitory concentration
Brine shrimp lethality

Opis:

A new series of four transition metal complexes of a Schiff base derived from salicylaldehyde and glycine, viz. [N-salicylidene glycinato diaqua cobalt (II) dimer] (SGCo)2, [N- salicylideneglycinato-di-aqua-nickel(ll)dimer] (SGN)2, [N-salicylideneglycinato-aqua-copper(II)] (SGC) and [N-salicylidene glycinato diaqua zinc(II) dimer] (SGZ)2 have been synthesized and characterized through a rapid, simple, and efficient methodology in excellent yield. These compounds were screened for in vitro antibacterial activities against six pathogenic bacteria, such as Shigella sonnei, Escherichia coli, Bacilus subtilis, Sarcina lutea, Staphylococcus aureus and Pseudomonas arioginosa. The antibacterial activity was determined by the disc diffusion method using DMSO as solvent. The results indicate that (SGC) compound exhibit a significant antibacterial activity, depending on the bacterial strain and (SGCo)2, (SGN)2 and (SGZ)2 compounds show a moderate sensitivity even with higher doses. All these compounds were found to possess cytotoxic effect.

Źródło:

International Letters of Chemistry, Physics and Astronomy; 2013, 5; 12-20
2299-3843

Pojawia się w:

International Letters of Chemistry, Physics and Astronomy

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 6.

Tytuł:

Analgesic and anti-inflammatory activities of some transition metal schiff base complexes

Autorzy:

Jesmin, M.
Islam, M. K.
Ali, S. M. M.

Powiązania:

https://bibliotekanauki.pl/articles/411762.pdf

Data publikacji:

2014

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Analgesic activity
Anti-inflammatory activity
Schiff bases complexes
Writhing test

Opis:

Analgesic and anti-inflammatory activities of four transition metal complexes of a Schiff base derived from salicylaldehyde and glycine, viz. [N-salicylideneglycinato diaqua cobalt(II) dimer] (SGCo)2, [N-salicylideneglycinato-di-aqua-nickel(ll)dimer] (SGN)2, [N-salicylideneglycinato-aqua-copper(II)] (SGC) and [N-salicylideneglycinato diaqua zinc(II) dimer] (SGZ)2 were studied in swiss albino mice. 10 mg/kg (p.o) dose for each compound were selected throughout the research work. The analgesic activity was determined by acetic acid induced writhing and tail immersion methods. All such data were compared with standard drugs at the dose of 10 mg/kg (p.o. The anti-inflammatory activity of the test compounds was determined by the carragenan induced mice paw edema inhibition method.). Analgesic and anti-inflammatory activities of the test compounds at 10 mg/kg (p.o.) were quite comparable to those of standard drugs at 10 mg/kg (p.o.). All these compounds can be considered as potent analgesic and anti-inflammatory agents.

Źródło:

International Letters of Chemistry, Physics and Astronomy; 2014, 8; 64-72
2299-3843

Pojawia się w:

International Letters of Chemistry, Physics and Astronomy

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 7.

Tytuł:

Three-Axis Attitude Estimation Of Satellite Through Only Two-Axis Magnetometer Observations Using LKF Algorithm

Autorzy:

Mehrjardi, M. F.
Sanusi, H.
Ali, M. A. M.

Powiązania:

https://bibliotekanauki.pl/articles/221622.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

satellite three-axis attitude estimation
two-axis magnetometer
observations
LKF
PD controller

Opis:

Estimation of satellite three-axis attitude using only one sensor data presents an interesting estimation problem. A flexible and mathematically effective filter for solving the satellite three-axis attitude estimation problem using two-axis magnetometer would be a challenging option for space missions which are suffering from other attitude sensors failure. Mostly, magnetometers are employed with other attitude sensors to resolve attitude estimation. However, by designing a computationally efficient discrete Kalman filter, full attitude estimation can profit by only two-axis magnetometer observations. The method suggested solves the problem of satellite attitude estimation using linear Kalman filter (LKF). Firstly, all models are generated and then the designed scenario is developed and evaluated with simulation results. The filter can achieve 10e-3 degree attitude accuracy or better on all three axes.

Źródło:

Metrology and Measurement Systems; 2015, 22, 4; 577-590
0860-8229

Pojawia się w:

Metrology and Measurement Systems

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 8.

Tytuł:

Boundary layer analysis in nanofluid flow past a permeable moving wedge in presence of magnetic field by using Falkner – skan model

Autorzy:

Ali, M.
Alim, M. A.

Powiązania:

https://bibliotekanauki.pl/articles/265769.pdf

Data publikacji:

2018

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

magnetohydrodynamika
nanofluid
porowatość
konwekcja
MHD
wedge flow
porosity
convection

Opis:

In the present work, the effect of various dimensionless parameters on the momentum, thermal and concentration boundary layer are analyzed. In this respect we have considered the MHD boundary layer flow of heat and transfer over a porous wedge surface in a nanofluid. The governing partial differential equations are converted into ordinary differential equations by using the similarity transformation. These ordinary differential equations are numerically solved using fourth order Runge–Kutta method along with shooting technique. The present results have been shown in a graphical and also in tabular form. The results indicate that the momentum boundary layer thickness reduces with increasing values of the pressure gradient parameter β for different situations and also for the magnetic parameter M but increases for the velocity ratio parameter λ and permeability parameter K*. The heat transfer rate increases for the pressure gradient parameter β, velocity ratio parameter λ, Brownian motion parameter Nb and Prandtl number Pr but opposite result is found for the increasing values of the thermoporesis parameter Nt. The nanoparticle concentration rate increases with an increase in the pressure gradient parameter β, velocity ratio parameter λ, Brownian motion parameter Nb and Lewis number Le, but decreases for the thermoporesis parameter Nt. Finally, the numerical results has compared with previously published studies and found to be in good agreement. So the validity of our results is ensured.

Źródło:

International Journal of Applied Mechanics and Engineering; 2018, 23, 4; 1005-1013
1734-4492
2353-9003

Pojawia się w:

International Journal of Applied Mechanics and Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 9.

Tytuł:

The natural refuge policy for Bt cotton (Gossypium L.) in Pakistan - a situation analysis
Polityka dotycząca naturalnych ostoi w odniesieniu do upraw bawełny Bt (Gossypium L.) w Pakistanie - analiza sytuacji

Autorzy:

Ali, M.S.

Powiązania:

https://bibliotekanauki.pl/articles/28255.pdf

Data publikacji:

2013

Wydawca:

Polskie Towarzystwo Botaniczne

Opis:

Bt cotton (event Cry1Ac) was formally commercialized in Pakistan in 2010. However, there has been an increasing trend of planting unauthorized Bt cotton germplasm in farmers’ fields since 2003 with a high rate of adoption in the core cotton areas especially in the province Punjab. The transgenic cotton technology has provided the growers with substantial economic benefits and has reduced their dependence on pesticides for pest control, especially against Helicoverpa armigera (Hubner). However, keeping in view the capacity of this insect to develop resistance against novel chemical formulations, it is easily speculated that Bt toxin, too, is no exception. Refuge crop policy for mono transgenic crop events has helped in delaying the rate of resistance evolution in the target pests. Thus, in Pakistan, where planting of structured refuge crops along Bt cotton fields is not mandatory, the effectiveness and durability of Bt cotton technology may decrease due to a number of factors which are discussed in this review.
Bawełna Bt (toksyna Cry1Ac) została oficjalnie wprowadzona na rynek w Pakistanie w 2010 roku. Jednak od 2003 roku istnieje tendencja wśród rolników do sadzenia na polach bawełny Bt z niedopuszczonym materiałem genetycznym, a wskaźnik rolników przechodzących na uprawę tego rodzaju bawełny jest wysoki, w szczególności w prowincji Pendżab. Stosowanie technologii uprawy transgenicznych odmian bawełny przyniosło producentom bawełny znaczne korzyści ekonomiczne oraz zmniejszyło ich zależność od pestycydów zwalczających szkodniki, w szczególności Helicoverpa armigera (Hubner). Jednak mając na względzie, że ten owad posiada zdolność rozwijania odporności na nowe preparaty chemiczne, łatwo można wysnuć wniosek, że toksyna Bt również nie stanowi wyjątku. Polityka dotycząca prowadzenia upraw stanowiących ostoje w przypadku stosowania monokulturowych upraw transgenicznych odmian bawełny pomogła opóźnić szybkość wytworzenia odporności w badanych szkodnikach. Z tego powodu w Pakistanie, gdzie nie ma obowiązku prowadzenia obok pól z bawełną Bt upraw o odpowiedniej strukturze stanowiących ostoję, efektywność i trwałość technologii uprawy bawełny Bt mogą się zmniejszyć z powodu szeregu czynników, które omówione są w niniejszym artykule.

Źródło:

Acta Agrobotanica; 2013, 66, 2
0065-0951
2300-357X

Pojawia się w:

Acta Agrobotanica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 10.

Tytuł:

Different synchronization schemes for chaotic Rikitake systems

Autorzy:

Ali Khan, M.

Powiązania:

https://bibliotekanauki.pl/articles/265096.pdf

Data publikacji:

2013

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

kontrola chaosu
chaos
system Rikitake
chaotic system
chaos synchronization
chaos control
Rikitake system

Opis:

This paper presents the chaos synchronization by designing a different type of controllers. Firstly, we propose the synchronization of bi-directional coupled chaotic Rikitake systems via hybrid feedback control. Secondly, we study the synchronization of unidirectionally coupled Rikitake systems using hybrid feedback control. Lastly, we investigate the synchronization of unidirectionally coupled Rikitake chaotic systems using tracking control. Comparing all the results, finally, we conclude that tracking control is more effective than feedback control. Simulation results are presented to show the efficiency of synchronization schemes.

Źródło:

International Journal of Applied Mechanics and Engineering; 2013, 18, 2; 383-393
1734-4492
2353-9003

Pojawia się w:

International Journal of Applied Mechanics and Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 11.

Tytuł:

Contact mechanics and wear simulations of hip resurfacing devices using computational methods

Autorzy:

Ali, M.
Mao, K.

Powiązania:

https://bibliotekanauki.pl/articles/307273.pdf

Data publikacji:

2014

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

archard wear law
biotribology elbow
contact
finite element analysis
wear
biotribologia
kontakt
zużycie

Opis:

The development of computational and numerical methods provides the option to study the contact mechanics and wear of hip resurfacing devices. The importance of these techniques is justified by the extensive amount of testing and experimental work required to verify and improve current orthopaedic implant devices. As the demands for device longevity is increasing, it is as important as ever to study techniques for providing much needed orthopaedic hip implant solutions. Through the use of advanced computer aided design and the finite element method, contact analysis of hip resurfacing devices was carried out by developing both three-dimensional and twodimensional axisymmetric models whilst considering the effects of loading conditions and material properties on the contact stresses. Following on from this, the three-dimensional model was used in combination with a unique programme to develop wear simulations and obtain cumulative wear for both the acetabular cup and femoral head simultaneously.

Źródło:

Acta of Bioengineering and Biomechanics; 2014, 16, 2; 103-110
1509-409X
2450-6303

Pojawia się w:

Acta of Bioengineering and Biomechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 12.

Tytuł:

Numerical simulation of the micropolar fluid flow and heat transfer in a channel with a shrinking and a stationary wall

Autorzy:

Ali, K.
Ashraf, M.

Powiązania:

https://bibliotekanauki.pl/articles/949324.pdf

Data publikacji:

2014

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

channel flow
shrinking/stationary walls
couple stress
quasi-linearization
Joule heating
viscous dissipation

Opis:

We present the numerical study of hydromagnetic (MHD) flow and heat transfer characte- ristics of a viscous incompressible electrically conducting micropolar fluid in a channel with one wall shrinking and the other at rest in the presence of a transverse applied magnetic field. Different from the classical shooting methodology, we employ a combination of a di- rect and an iterative method (SOR with optimal relaxation parameter) for solving the sparse systems of linear algebraic equations arising from the FD discretization of the linearized self similar nonlinear ODEs. Effects of some physical parameters on the flow and heat transfer are discussed and presented through tables and graphs. The present investigation may be beneficial to the flow and thermal control of polymeric processing.

Źródło:

Journal of Theoretical and Applied Mechanics; 2014, 52, 2; 557-569
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 13.

Tytuł:

The impact of organizational culture on creativity and innovation
Wpływ kultury organizacyjnej na kreatywność i innowacje

Autorzy:

Ali Taha, V.
Sirkova, M.
Ferencova, M.

Powiązania:

https://bibliotekanauki.pl/articles/404670.pdf

Data publikacji:

2016

Wydawca:

Politechnika Częstochowska

Tematy:

organizational culture
creativity
innovation
kultura organizacyjna
kreatywność
innowacja

Opis:

In a hyper-competitive business environment will survive and succeed only those enterprises that are able to come up with a new ideas and/or unique products or applications. Creativity goes hand in hand with innovation; higher creativity leads to more innovation. Developing organizational culture that stimulates and promotes creativity and innovation is an imperative for organizations seeking a competitive advantage. The paper examines the relationship between culture (selected elements), creativity and innovation. Based on primary data obtained in a questionnaire survey conducted in Slovak organizations there were found associations between all the (pairs of) variables. The strongest association was measured between the atmosphere of psychological safety in the workplace and employees' willingness to produce new ideas and between interpersonal relationships in the workplace and individual creativity.
W środowisku biznesowym przetrwają i odniosą sukces tylko te przedsiębiorstwa, które są w stanie kreować nowe produkty lub aplikacje. Rozwój kultury organizacyjnej, stymuluje kreatywność i innowacyjność; jest niezbędna dla organizacji starającej się o uzyskanie przewagi konkurencyjnej. Artykuł analizuje zależność pomiędzy wybranymi elementami kultury organizacyjnej a kreatywnością i innowacyjnością. W oparciu o dane uzyskane w badaniu ankietowym przeprowadzonym w firmach działających na Słowacji udało się wyodrębnić powiązania. Najsilniejsze z nich występuje pomiędzy atmosferą psychicznego bezpieczeństwa w miejscu pracy i otwartością na nowe pomysły oraz pozytywnymi relacjami interpersonalnymi w miejscu pracy, co pozwala na indywidualną kreatywność.

Źródło:

Polish Journal of Management Studies; 2016, 14, 1; 7-17
2081-7452

Pojawia się w:

Polish Journal of Management Studies

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 14.

Tytuł:

Trends and Differences of Applying Intelligence to an Agent

Autorzy:

Elmahalawy, A. M.
Ali, M. A.
Harb, H. M.

Powiązania:

https://bibliotekanauki.pl/articles/308386.pdf

Data publikacji:

2011

Wydawca:

Instytut Łączności - Państwowy Instytut Badawczy

Tematy:

accumulative intelligence
dynamic intelligence
intelligent agent

Opis:

The agent technology has recently become one of the most vibrant and fastest growing areas in information technology. On of the most promising characteristics of agent is its intelligence. Intelligent agent is the agent that percepts its environment, collects all information about its environment that it needs, processes these information and then generate proper actions according to these information. This paper discusses trends and differences between two main types of intelligence that can be applied to agent: accumulative intelligence and dynamic intelligence. Accumulative intelligence is discussed with its two perspectives: moment perspective and historical perspective. Auto-vehicle driver is also discussed as an application example of accumulative intelligence. Also, MOSAIC, Mimesis, and MINDY models are reviewed as the pioneering works of dynamic intelligence.

Źródło:

Journal of Telecommunications and Information Technology; 2011, 4; 119-123
1509-4553
1899-8852

Pojawia się w:

Journal of Telecommunications and Information Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 15.

Tytuł:

Feline ocular toxoplasmosis: seroprevalence, diagnosis and treatment outcome of 60 clinical cases

Autorzy:

Ali, K.M.
Abu-Seida, A.M.
Abuowarda, M.

Powiązania:

https://bibliotekanauki.pl/articles/2087214.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

cats
chorioretinitis
keratitis
seroprevalence
Toxoplasma gondii
uveitis

Źródło:

Polish Journal of Veterinary Sciences; 2021, 24, 1; 51-61
1505-1773

Pojawia się w:

Polish Journal of Veterinary Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 16.

Tytuł:

Resource Management Techniques in Cloud-Fog for IoT and Mobile Crowdsensing Environments

Autorzy:

Ali Al-muqarm, Abbas M.
Ali Hussien, Naseer

Powiązania:

https://bibliotekanauki.pl/articles/27311923.pdf

Data publikacji:

2023

Wydawca:

Polska Akademia Nauk. Czasopisma i Monografie PAN

Tematy:

IoT
Fog
Cloud
resource allocation
Task Scheduling

Opis:

The unpredictable and huge data generation nowadays by smart devices from IoT and mobile Crowd Sensing applications like (Sensors, smartphones, Wi-Fi routers) need processing power and storage. Cloud provides these capabilities to serve organizations and customers, but when using cloud appear some limitations, the most important of these limitations are Resource Allocation and Task Scheduling. The resource allocation process is a mechanism that ensures allocation virtual machine when there are multiple applications that require various resources such as CPU and I/O memory. Whereas scheduling is the process of determining the sequence in which these tasks come and depart the resources in order to maximize efficiency. In this paper we tried to highlight the most relevant difficulties that cloud computing is now facing. We presented a comprehensive review of resource allocation and scheduling techniques to overcome these limitations. Finally, the previous techniques and strategies for allocation and scheduling have been compared in a table with their drawbacks.

Źródło:

International Journal of Electronics and Telecommunications; 2023, 69, 2; 341--352
2300-1933

Pojawia się w:

International Journal of Electronics and Telecommunications

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 17.

Tytuł:

Performance evaluation of ZVS/ZCS high efficiency AC/DC converter for high power applications

Autorzy:

Ali, A.
Chuanwen, J.
Khan, M. M.
Habib, S.
Ali, Y.

Powiązania:

https://bibliotekanauki.pl/articles/200472.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

switching losses
zero current switching
zero voltage switching
power quality
reverse recovery loss

Opis:

The increased power density, reduced switching losses with minimum electromagnetic interference (EMI), and high efficiency are essential requirements of power converters. To achieve these characteristics, soft power converters employing soft switching techniques are indispensable. In this paper, a ZCS/ZVS PWM AC/DC converter topology has been emphasized, which finds applications in high power systems such as automobile battery charging and renewable energy systems. This converter scheme maintains zero current and zero voltage switching conditions at turn on and turn off moments of semiconductor switches, respectively and soft operation of rectifier diodes that lead to negligible switching and diode reverse recovery losses. Moreover, it improves power quality and presents high input power factor, low total harmonic distortion of the input current (THDI ) and improved efficiency. The validity of theoretical analysis of the proposed converter has been carried out experimentally on a 10 kW laboratory prototype. Experimental results prove that the soft switching operation of the semiconductor switches and diodes is maintained at 98.6% rated load efficiency. In addition, the performance evaluation has been performed by comparative analysis of the proposed converter with some prior art high power AC/DC converters. Efficiencies of the proposed and prior art high power topologies have been determined for different load conditions. The highest efficiency, power factor and lower THDI of the proposed converter topology complies with international standards.

Źródło:

Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 4; 793-807
0239-7528

Pojawia się w:

Bulletin of the Polish Academy of Sciences. Technical Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 18.

Tytuł:

Management of HR processes in the specific contexts of selected area
Zarządzanie procesami w zakresie zasobów ludzkich w określonych kontekstach wybranych obszarów

Autorzy:

Sirkova, M.
Ali Taha, V.
Ferencova, M.

Powiązania:

https://bibliotekanauki.pl/articles/404907.pdf

Data publikacji:

2016

Wydawca:

Politechnika Częstochowska

Tematy:

management
HR processes
talent management
tourism
hospitality
zarządzanie
procesy w zakresie zasobów ludzkich
zarządzanie talentami
turystyka
gościnność

Opis:

The paper deals with the HR processes and selected areas of talent management in the specific context of tourism. It also highlights the benefits of talent management implementation and specifies HR processes used by organizations in practice. The paper draws primarily on a primary data gathered through questionnaire survey among selected organizations. Results shows, that there is a significant association between organizational characteristics and implementation of talent management, specifically the implementation/non-implementation of talent management is related to the size of the organization. The findings confirm that the HR management should be focused more on the issue of developing and implementing talent management processes, filling management positions by talented people, stimulating talented people financially, putting more emphasis on developing the potential of employees (through education and training).
Artykuł zajmuje się procesami w zakresie zasobów ludzkich oraz wybranych obszarów zarządzania talentami w konkretnym kontekście turystyki. Podkreśla również korzyści z wdrożenia zarządzania talentami i precyzuje procesy w zakresie zasobów ludzkich stosowane przez organizacje w praktyce. Artykuł opiera się głównie na podstawowych danych zebranych przez badanie ankietowe wśród wybranych organizacji. Otrzymane wyniki wskazują, że istnieje znaczący związek pomiędzy cechami organizacyjnymi i implementacją zarządzania talentami, zwłaszcza implementacja/nieimplementacja zarządzania talentami jest związana z wielkością organizacji. Wyniki potwierdzają, że zarządzanie zasobami ludzkimi powinno być koncentrowane bardziej na kwestii rozwijania i wdrażania procesów zarządzania talentami, obsadzania stanowisk kierowniczych przez utalentowanych ludzi, stymulowania utalentowanych ludzi finansowo, kładzenia większego nacisku na rozwijanie potencjału pracowników (poprzez edukację i szkolenia).

Źródło:

Polish Journal of Management Studies; 2016, 13, 2; 142-152
2081-7452

Pojawia się w:

Polish Journal of Management Studies

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 19.

Tytuł:

Selected practices of talent management : insight into Slovak organizations
Wybrane praktyki „zarządzania talentami” : wprowadzenie do słowackich organizacji

Autorzy:

Ali Taha, V.
Sirkova, M.
Ferencova, M.

Powiązania:

https://bibliotekanauki.pl/articles/406101.pdf

Data publikacji:

2013

Wydawca:

Politechnika Częstochowska

Tematy:

talent
talent management
practice
organization
zarządzanie talentami
praktyka
organizacja

Opis:

The paper examines selected areas of talent management. Based on the present literature, the aim was to identify individual processes and practices of talent management. Subsequently, questionnaire survey was conducted to obtain primary data - to determine the prevalence and implementation of talent management in Slovak organizations. The article is focused on presentation of partial results of the survey - how Slovak organizations define talents, declare talent management strategy and implement talent management as an approach.
Artykuł analizuje wybrane obszary zarządzania talentami. Oparte na obecnej literaturze, celem artykułu było zidentyfikowanie poszczególnych procesów i praktyk zarządzania talentami. Następnie przeprowadzono badanie ankietowe w celu uzyskania danych pierwotnych - określenie częstości występowania i wdrażanie zarządzania talentami w organizacjach słowackich. Artykuł koncentruje się na prezentacji częściowych wyników badania, w jaki sposób organizacje słowackich definiują talenty, określają strategię zarządzania talentami i wdrażają zarządzanie talentami jako ogólne podejście.

Źródło:

Polish Journal of Management Studies; 2013, 8; 16-25
2081-7452

Pojawia się w:

Polish Journal of Management Studies

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 20.

Tytuł:

Mechanical vapour compression refrigeration system: review part 1: environment challenge

Autorzy:

Mahmood, Raid Ahmed
Ali, Omar M.
Noor, M. M.

Powiązania:

https://bibliotekanauki.pl/articles/1839710.pdf

Data publikacji:

2020

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

czynnik chłodniczy
układ chłodniczy
warstwa ozonowa
alternative refrigerant
mixture refrigerants
vapour compression refrigeration system
ozone depletion potential
global worming potential
R507A refrigerant
natural refrigerant
R-718 (water/steam)

Opis:

In Australia and others developed countries, concerns about global warming have increased, and these concerns influence the use of refrigerants as working fluids in mechanical vapour compression refrigeration systems. One of the most important aspects of refrigerant selection is to reduce its impact on the environment and the ozone layer. This paper provides a comprehensive review of various theoretical and experimental studies which have been carried out on air conditioning and refrigeration applications to investigate the effect of refrigerants on the environment. The analysis in this paper reveals that alternative refrigerants are the most suitable working fluids that can be used in refrigeration systems to meet the needs of the environment. This study also suggests that natural types of refrigerants such as water, carbon dioxide, and hydrocarbon will play a significant role in protecting the environment and providing alternative friendly refrigerants to be used in refrigeration and air conditioning systems.

Źródło:

International Journal of Applied Mechanics and Engineering; 2020, 25, 4; 130-147
1734-4492
2353-9003

Pojawia się w:

International Journal of Applied Mechanics and Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 21.

Tytuł:

Micropropagation of Grewia tenax (Forssk.) Fiori – an important ethnomedicinal plant

Autorzy:

Daffalla, H.M.
Elsheikh, A.M.
Ali, H.A.
Khalafalla, M.M.

Powiązania:

https://bibliotekanauki.pl/articles/80945.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

ethnomedicine
Grewia tenax
micropropagation
shrub species
natural environment
seed dormancy
cotyledon
benzyladenine
kinetin
adenine
thidiazuron
multiple shoot culture
shoot multiplication

Źródło:

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2019, 100, 3
0860-7796

Pojawia się w:

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 22.

Tytuł:

Energy efficiency analysis of styrene production by adiabatic ethylbenzene dehydrogenation using exergy analysis and heat integration

Autorzy:

Ali, E.
Hadj-Kali, M.

Powiązania:

https://bibliotekanauki.pl/articles/949461.pdf

Data publikacji:

2018

Wydawca:

Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie

Tematy:

Styrene production
Ethylbenzene dehydrogenation
Exergy analysis
Heat Integration
Pinch Analysis
Heat Recovery

Opis:

Styrene is a valuable commodity for polymer industries. The main route for producing styrene by dehydrogenation of ethylbenzene consumes a substantial amount of energy because of the use of high-temperature steam. In this work, the process energy requirements and recovery are studied using Exergy analysis and Heat Integration (HI) based on Pinch design method. The amount of steam plays a key role in the trade-off between Styrene yield and energy savings. Therefore, optimizing the operating conditions for energy reduction is infeasible. Heat integration indicated an insignificant reduction in the net energy demand and exergy losses, but 24% and 34% saving in external heating and cooling duties, respectively. When the required steam is generated by recovering the heat of the hot reactor effluent, a considerable saving in the net energy demand, as well as the heating and cooling utilities, can be achieved. Moreover, around 68% reduction in the exergy destruction is observed.

Źródło:

Polish Journal of Chemical Technology; 2018, 20, 1; 35-46
1509-8117
1899-4741

Pojawia się w:

Polish Journal of Chemical Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 23.

Tytuł:

Two Modulo Three Sum Graphs

Autorzy:

Esakki, M. Vanu
Nisaya, M. P. Syed Ali

Powiązania:

https://bibliotekanauki.pl/articles/1030957.pdf

Data publikacji:

2020

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Two modulo three sum graph
Two modulo three sum labeling

Opis:

Let G = (V, E) be a graph with p vertices and q edges is said to be a two modulo three sum graph if there is an injective function f from V(G) to { a∶0≤a≤3q-1 and either a≡0(mod 3) or a≡2(mod 3)} where q is the number of edges of G and such that finduces a bijectionf^* from E(G) to {a∶2≤a≤3q-1 and a≡2(mod 3)} given byf^* (uv)=f(u)+f(v)and the function f is called two modulo three sum labeling of G. In this paper, we introduce an analog of sum labeling known as two modulo three sum labeling and we define two modulo three sum labeling of some tree related graphs. Also we prove that split star, mirror path graph, complete bipartite graph and C_4 ʘ〖nK〗_1 are two modulo three sum graphs.

Źródło:

World Scientific News; 2020, 145; 274-285
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 24.

Tytuł:

Numerical simulation of flow and heat transfer in hydromagnetic micropolar fluid between two stretchable disks with viscous dissipation effects

Autorzy:

Ali, K.
Ahmad, S.
Ashraf, M.

Powiązania:

https://bibliotekanauki.pl/articles/279778.pdf

Data publikacji:

2016

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

MHD
micropolar fluid
stretchable disk
viscous dissipation
couple stress
heat transfer rate

Opis:

A study of magnetohydrodynamic (MHD) flow with viscous dissipation and heat transfer in an electrically conducting laminar steady viscous incompressible micropolar fluid between two infinite uniformly stretching disks is presented. The transformed self similar nonlinear ODEs are first linearized using a quasi linearization method and then solved by employing a combination of a direct and an iterative method. The study may be beneficial to flow and thermal control of polymeric processing.

Źródło:

Journal of Theoretical and Applied Mechanics; 2016, 54, 2; 633-643
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 25.

Tytuł:

On a regularization method for variational inequalities with P0 mappings

Autorzy:

Konnov, I.
Mazurkevich, E.
Ali, M.

Powiązania:

https://bibliotekanauki.pl/articles/908486.pdf

Data publikacji:

2005

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

nierówność wariacyjna
metoda regularyzacji
variational inequalitie
partial regularization approach
P0-mappings

Opis:

We consider partial Browder-Tikhonov regularization techniques for variational inequality problems with P₀ cost mappings and box-constrained feasible sets. We present classes of economic equilibrium problems which satisfy such assumptions and propose a regularization method for these problems.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2005, 15, 1; 35-44
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 26.

Tytuł:

Discrete Time Model for Bond Detection in Thin Layer Materials

Autorzy:

Ali, M.
Elsayed, N.
Hassan, G.

Powiązania:

https://bibliotekanauki.pl/articles/1419712.pdf

Data publikacji:

2012-07

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

43.60.+d

Opis:

Recursive equations were developed and introduced that enable to calculate the transmitted waves through a multiplicity of layers. The calculations are carried out using z-transform technique. The layers are considered lossless and have parallel interface, which are at normal incidence to the field. The multilayered structures are constructed of three aluminum plates connected together with epoxy as the adhesive layers. The method has been successfully used to detect small changes in the thickness of adhesive layers.

Źródło:

Acta Physica Polonica A; 2012, 122, 1; 82-84
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 27.

Tytuł:

Issues of Children with Disabilities as Reflected in the Jordanian Media from their Parents’ Perception: A SWOT Analysis

Autorzy:

Alodat, Ali M.
Almakanin, Hisham A.

Powiązania:

https://bibliotekanauki.pl/articles/1969381.pdf

Data publikacji:

2018-06-30

Wydawca:

Wydawnictwo Adam Marszałek

Tematy:

issues of children with disabilities
Jordanian media
SWOT Model
special education

Opis:

A SWOT study was conducted to analyze parents’ perspective on the degree to which Jordanian media covers issues of children with disabilities; the study sample consisted of 129 parents. The researchers constructed a scale consisting of 28 items; furthermore, validity and reliability coefficients of the scale were extracted. Results showed a moderate level of media coverage regarding issues of children with disabilities; social media was given the highest rating followed by visual and audio media, and lastly print media such as newspapers and magazines. However, the majority of media coverage addressed physical and health issues and communicative disorders. Finally, recommendations to improve practices were provided.

Źródło:

The New Educational Review; 2018, 52; 271-283
1732-6729

Pojawia się w:

The New Educational Review

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 28.

Tytuł:

The effect of changing injection temperature on some mechanical and morphological properties for polypropylene material (PP)

Autorzy:

Al-Zubiedy, Ali
Muneer, Ruaa M.

Powiązania:

https://bibliotekanauki.pl/articles/111895.pdf

Data publikacji:

2019

Wydawca:

Stowarzyszenie Menedżerów Jakości i Produkcji

Tematy:

polypropylene PP
injection molding
mechanical properties of polymers
polipropylen PP
formowanie wtryskowe
właściwości mechaniczne

Opis:

This is a study of a medical injection factory-Babylon carried out in order to achieve proper mechanical and morphological properties, PP has been injection molded by using cold runner injection molding machine with temperature variation (198, 200, 203……2200C) for ten samples. The physical and mechanical properties of PP product were examined. It has been found that the Shore hardness decreases linearly with injection molding temperature increasing. The tensile strength has a similar behavior to the hardness. However, it has been found that the MIF (Melt Index Flow) rates increases with the increase of injection molding temperature. The density of PP has been found for both virgin PP and the samples, it has been found that the density decreases with increasing operation temperature. FTIR (Fourier Transmission Infrared) spectra were taken for both samples with high and low operation temperature. Besides the SEM (Scanning Electronic Microscopy) test shows the difference in the morphology of the product surface and the PP product at high and low operation temperature. Moreover, for all these properties, the PP product exhibits good mechanical properties (hardness, tensile strength, density) for the samples produced at temperature lower than 2070C. While the physical properties such as MIF improved with injection temperature increasing, additionally, the SEM images show that the sample produced in low temperature have surface damage.

Źródło:

Production Engineering Archives; 2019, 24; 20-24
2353-5156
2353-7779

Pojawia się w:

Production Engineering Archives

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 29.

Tytuł:

Total vertex irregularity strength of disjoint union of Helm graphs

Autorzy:

Ahmad, Ali
Baskoro, E.
Imran, M.

Powiązania:

https://bibliotekanauki.pl/articles/743230.pdf

Data publikacji:

2012

Wydawca:

Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii

Tematy:

vertex irregular total k-labeling
Helm graphs
total vertex irregularity strength

Opis:

A total vertex irregular k-labeling φ of a graph G is a labeling of the vertices and edges of G with labels from the set {1,2,...,k} in such a way that for any two different vertices x and y their weights wt(x) and wt(y) are distinct. Here, the weight of a vertex x in G is the sum of the label of x and the labels of all edges incident with the vertex x. The minimum k for which the graph G has a vertex irregular total k-labeling is called the total vertex irregularity strength of G. We have determined an exact value of the total vertex irregularity strength of disjoint union of Helm graphs.

Źródło:

Discussiones Mathematicae Graph Theory; 2012, 32, 3; 427-434
2083-5892

Pojawia się w:

Discussiones Mathematicae Graph Theory

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 30.

Tytuł:

An effect of binary fluid on the thermal performance of pulsation heat pipe

Autorzy:

Barrak, Anwar S.
Ali, Nawfal M
Ali, Hussein Hayder Mohammed

Powiązania:

https://bibliotekanauki.pl/articles/2174164.pdf

Data publikacji:

2022

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

rura cieplna
przepływ dwufazowy
przepływ ciepła
binary fluid
oscillation heat pipe
two phase flow
thermal resistance
heat transfer

Opis:

A pulsation heat pipe is an efficient heat pipe used in many engineering applications. This study aims to test the effect of working fluids on the thermal performance of pulsation heat pipe. Seven turned pulsation heat pipes were designed and manufactured from a copper pipe with a 3.5 mm inner diameter. The lengths of an evaporation part, an adiabatic passage, and a condenser part were 300 mm, 210 mm, and 300 mm, respectively. In this study, three different fluids were used as the working fluid: distilled water, methanol, and binary fluid (a mixture of water and methanol) with a 50% filling ratio. Compared to water, the experimental results suggested that methanol had a better thermal performance when used as a working fluid in the PHP. On the other hand, a binary fluid enhanced the lower thermal performance of water (29% reduction in the thermal resistance and a 20% increase in the effective thermal conductivity of the PHP).

Źródło:

International Journal of Applied Mechanics and Engineering; 2022, 27, 1; 21--34
1734-4492
2353-9003

Pojawia się w:

International Journal of Applied Mechanics and Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 31.

Tytuł:

Erbium-doped fiber ring laser dynamical analysis for chaos message masking scheme

Autorzy:

Ali, S. Z.
Islam, M. K.

Powiązania:

https://bibliotekanauki.pl/articles/173276.pdf

Data publikacji:

2017

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

erbium-doped fiber ring laser chaos
optical chaos
chaos message masking
Lyapunov exponent
secure optical communication

Opis:

A detailed dynamical analysis of erbium-doped fiber ring laser cavity loss configuration for the chaos message masking scheme is carried out to optimize the generation of high quality chaos. A threefold increase in Lyapunov exponent implying higher security, and a significant increase in chaos bandwidth is achieved, both ideal for secure optical communication and nonlinear chaotic applications. The pulsed chaos is chaotic in a pulse time interval in addition to the amplitude resulting in better concealment of data pulses in a time domain. The chaos spectrum is a flat broadband and rich in spikes making spectral detection of a message more difficult. The range of five key parameters for which erbium-doped fiber ring laser retains its chaotic behaviour is also increased significantly reducing the effectiveness of a brute force attack to guess the erbium-doped fiber ring laser parameters. The chaos message masking scheme provides a higher security in comparison with additive chaos modulation scheme for implementation of chaotic optical communication using erbium- doped fiber ring laser. The security of a complete end-to-end chaotic optical communication system is tested by launching a spectral attack to estimate the message signal. The message signal clearly hides in a stronger chaotic signal and its spectral contents are not discernible.

Źródło:

Optica Applicata; 2017, 47, 3; 395-410
0078-5466
1899-7015

Pojawia się w:

Optica Applicata

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 32.

Tytuł:

TE Surface Waves in a Plasma Sandwich Structure

Autorzy:

Shaikh, M.
Zamir, B.
Ali, R.

Powiązania:

https://bibliotekanauki.pl/articles/1189881.pdf

Data publikacji:

2015-06

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

41.20.Jb
84.40.Az

Opis:

Transverse electric surface waves are analyzed in a plasma medium bounded by a left-handed material. A dispersion relation is obtained by applying the boundary conditions for the tangential field components. Numerical investigations show the dependence of effective wave index on the propagation frequency for different thicknesses and number densities of the plasma medium and also for different values of the filling factor of left-handed material.

Źródło:

Acta Physica Polonica A; 2015, 127, 6; 1625-1629
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 33.

Tytuł:

A Short Range Synthetic Aperture Imaging Radar with Rotating Antenna

Autorzy:

Ali, F.
Urban, A.
Vossiek, M.

Powiązania:

https://bibliotekanauki.pl/articles/226520.pdf

Data publikacji:

2011

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

radar
synthetic aperture
scanning
imaging

Opis:

The design of a short range synthetic aperture imaging radar is introduced in this paper. A radar hologram is acquired using a small omnidirectional antenna that is mounted on a rotating platform. After each turn of the platform a high resolution 360° 2D image is reconstructed; a rotating window function optimizes the reconstructed image function to get the best image focus for detecting both weak and strong scatterers. The rotating window function depends on the target direction and is executed for each image point and each target direction. The size of the synthetic aperture – and thus the lateral resolution of the imaging system – is determined by the diameter of the circular antenna trajectory. In contrast to common radar scanner concepts that utilize highly directional and thus bulky antennas, the proposed scanner concept has the advantage of using a small, lightweight omni-directional antenna. The developed radar system is much more compact and the scanning mechanics are significantly simplified. Furthermore, an omni-directional antenna offers very straightforward options for powering the radar on the rotation platform. Measurement results obtained with a 24 GHz FMCW short range radar sensor illustrate the performance of the proposed SAR imaging method.

Źródło:

International Journal of Electronics and Telecommunications; 2011, 57, 1; 97-102
2300-1933

Pojawia się w:

International Journal of Electronics and Telecommunications

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 34.

Tytuł:

Challenges to European Statistics’ Credibility -Why European Statistics is Still not Transparent and its Credibility Unsatisfactory

Autorzy:

Simchera, Vasily M.
Koyuncugil, Ali Serhan

Powiązania:

https://bibliotekanauki.pl/articles/465993.pdf

Data publikacji:

2011

Wydawca:

Główny Urząd Statystyczny

Opis:

Despite the recognized catholicity and the credibility of European statistics in general (with some exceptions of implemented projects) and in individual European countries still raises number of issues and doubts. At the same time following the Quételet law, which states the more crimes the less penalties, European statistics today as the most advanced, intellectual and informative one still accumulate doubts and issues towards itself. These doubts, issues and challenges grow in geometric progression and first of all it concerns its credibility, which appears to be its basis and nerve. Why European statistics credibility is unsatisfactory and tends to go down? Why its transparency and people’s confidence are down? At last, why it stirs up the social tensions instead of opposite action in the enlightened European society? Is it because the European statistics regardless of its virtual image in real life still not transparent, practices double standards, “feeds” society with unnecessary methodologies instead of clear and available information and rather misleading than helping? Or is it because the modern statistics in general and almost everywhere by its nature is dependent and serves authorities and not the truth? Is it possible to change such situation to the better, and if it is when and on which conditions?

Źródło:

Statistics in Transition new series; 2011, 12, 3; 567-578
1234-7655

Pojawia się w:

Statistics in Transition new series

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 35.

Tytuł:

Measuring Heavy Metals Content in Wastewater using Laser Induced Breakdown Spectroscopy

Autorzy:

Ali, S.
Jamil, H.
Imran, M.

Powiązania:

https://bibliotekanauki.pl/articles/412386.pdf

Data publikacji:

2014

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

heavy metals
leather factories
wastewater
spectroscopy

Opis:

In the present study, laser-induced breakdown spectroscopy (LIBS) has been applied for the determination of chromium and cadmium contents in wastewater of different canneries surrounding by leather factories. The plasma was generated with a Q-switched Nd:YAG laser having a fundamental wavelength of 1064 nm and delivers maximum pulse energy of 180 mJ. Experimental conditions were optimized to improve the sensitivity and to get a reasonable signal from the generated plasma. The results show that the concentration of chromium and cadmium are varying in different samples depending on the incoming flow of the wastewater from factories. The results from LIBS and standard analytical technique called flame atomic absorption spectroscopy (FAAS) were compared and found in good agreement within the experimental uncertainties.

Źródło:

International Letters of Chemistry, Physics and Astronomy; 2014, 2; 69-75
2299-3843

Pojawia się w:

International Letters of Chemistry, Physics and Astronomy

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 36.

Tytuł:

The sensitivity of vegetation in the lower Tigris basin landscapes to regional and global climate variability

Autorzy:

Alhumaima, Ali S.
Abdullaev, Sanjar M.

Powiązania:

https://bibliotekanauki.pl/articles/35516789.pdf

Data publikacji:

2021

Wydawca:

Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie

Tematy:

climate variability
vegetation
global modulation
precipitation
temperature

Opis:

This study investigates the lower Tigris basin’s the normalized difference vegetation index (NDVI) sensitivity in 2000–2016 to regional climate variability reflected by the monthly precipitation and temperature time series of seven global datasets as well as to four global circulation indices. To examine the effect of climate variability on the different ecosystems, the study area has been classified into 10 smaller natural and anthropogenic landscapes based on landforms and land cover patterns. The preliminary analysis showed that the maximum biological productivity reflected by the NDVI of March and April has the highest correlation (0.5–0.8) to the same cumulative amounts of October–March period total precipitation and January–March period mean temperatures according to all datasets. In addition, this article showed there is a correlation between landscapes’ NDVI and global modulation represented by the September–February state of El Nińo-Southern Oscillation (ENSO) (0.55–0.70) and December state of the dipole mode index (DMI) (0.35–0.72). The significant differences in the original precipitation and temperature levels according to the different datasets have urged the use of normalized time series: z-score of temperatures and analogous six-months the standardized precipitation index (SPI). However, the multiple correlation analysis showed that using ERA-

Źródło:

Scientific Review Engineering and Environmental Sciences; 2021, 30, 1; 159-170
1732-9353

Pojawia się w:

Scientific Review Engineering and Environmental Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 37.

Tytuł:

Application of azoxystrobin fungicide improves drought tolerance in tomato, via enhancing physio-biochemical and anatomical feature

Autorzy:

Ali, A.A.I.
Desoky, E-S.M.
Rady, M.M.

Powiązania:

https://bibliotekanauki.pl/articles/11895.pdf

Data publikacji:

2019

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Źródło:

International Letters of Natural Sciences; 2019, 76
2300-9675

Pojawia się w:

International Letters of Natural Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 38.

Tytuł:

A study on chemical characterization and proximate composition of flathead mullet fish (Mugil cephalus) of estuarine region of the Bay of Bengal

Autorzy:

Rowshan-Ali, M.
Roni, M.A.H.
Haque, M.A.
Uddin, M.H.

Powiązania:

https://bibliotekanauki.pl/articles/11517.pdf

Data publikacji:

2014

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

chemical characteristics
proximate composition
flathead mullet
fish
Mugil cephalus
polyunsaturated fatty acid
estuarine habitat
Bengal Bay

Opis:

The Flathead mullet (Mugil cephalus) is a mullet of the genus Mugil in the family Mugilidae, found in coastal tropical, subtropical and estuarine water worldwide. Lipid was extracted from the muscle of Flathead mullet (Mugil cephalus) by solvent extraction method and characterized with respect to various chemical e.g. saponification value, saponification equivalent value, acid value, iodine value, peroxide value, ester value, thicyanogen value, unsaponifiable matter, Henher value, Polenske value, Reichert-Meissl value etc properties and compared with those of different oils. Palmitic acid, Stearic acid and Myristic acid were observed at fatty acid composition of the sample by chromatographic examination. Percentages of protein and mineral (N, P, K, Ca) in the muscle of Flathead mullet were studied by modified Kjeldahl method.

Źródło:

International Letters of Natural Sciences; 2014, 12, 2
2300-9675

Pojawia się w:

International Letters of Natural Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 39.

Tytuł:

Some results on centered triangular sum graphs

Autorzy:

Baskar, M.
Namasivayam, P.
Syed Ali Nisaya, M. P.

Powiązania:

https://bibliotekanauki.pl/articles/1193374.pdf

Data publikacji:

2021

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Centered triangular numbers
centered triangular sum graphs
centered triangular sum labeling

Opis:

A centered triangular sum labeling of a graph G is a one-to-one function f : V (G) → N ∪{0} that induces a bijection f *: E(G) →{B_1 〖,B〗_2,…B_q} of the edges of G defined by f * (uv) = f(u) + f(v), for all e = uv ∊ E(G). The graph which admits such labeling is called a centered triangular sum graph.

Źródło:

World Scientific News; 2021, 155; 113-128
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 40.

Tytuł:

Further results on centered triangular sum graphs

Autorzy:

Baskar, M.
Namasivayam, P.
Syed Ali Nisaya, M. P.

Powiązania:

https://bibliotekanauki.pl/articles/1193390.pdf

Data publikacji:

2021

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Centered triangular numbers
centered triangular sum graphs
centered triangular sum labeling

Opis:

Let G be a graph with p vertices and q edges. The nth centered triangular number is denoted by M_n, where M_n = 1/2 (3n2 - 3n + 2). A centered triangular sum labeling of a graph G is a one-to-one function : V (G) → N ∪{0} that induces a bijection f *: E(G) →{M_1 〖,M〗_2,…M_q} of the edges of G defined by f * (uv) = f(u) + f(v), for all e = uv ∊ E(G). The graph which admits such labeling is called a centered triangular sum graph. In this article, the centered triangular sum labeling of union of some graphs are studied.

Źródło:

World Scientific News; 2021, 156; 13-25
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 41.

Tytuł:

Numerical simulation of unsteady water-based nanofluid flow and heat transfer between two orthogonally moving porous coaxial disks

Autorzy:

Ali, K.
Farooq Iqbal, M.
Akbar, Z
Ashraf, M.

Powiązania:

https://bibliotekanauki.pl/articles/949359.pdf

Data publikacji:

2014

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

porous disks
Al2O3 nanoparticles
viscous dissipation
wall expansion ratio
Joule Heating

Opis:

We present the numerical study of unsteady hydromagnetic (MHD) flow and heat trans- fer characteristics of a viscous incompressible electrically conducting water-based nanofluid (containing Al₂O₃ nanoparticles) between two orthogonally moving porous coaxial disks with suction. Different from the classical shooting methodology, we employ a combination of a direct and an iterative method (SOR with optimal relaxation parameter) for solving the sparse systems of linear algebraic equations arising from the FD discretization of the linearized self similar nonlinear ODEs. Effects of the governing parameters on the flow and heat transfer are discussed and presented through tables and graphs. The findings of the present investigation may be beneficial for electronic industry in maintaining the electronic components under effective and safe operational conditions.

Źródło:

Journal of Theoretical and Applied Mechanics; 2014, 52, 4; 1033-1046
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 42.

Tytuł:

Mechanical properties and microstructure of alkali activated mortar containing unexpanded clay

Autorzy:

Nasser, I.F.
Ali, M.A.
Kadhim, M.J.

Powiązania:

https://bibliotekanauki.pl/articles/2201132.pdf

Data publikacji:

2022

Wydawca:

Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach

Tematy:

alkali-activated mortar
pozzolan
unexpanded clay
flexural toughness
scanning electron microscope
thermal insulation
pucolana
glina nie spulchniona
wytrzymałość na zginanie
skaningowy mikroskop elektronowy
izolacja termiczna

Opis:

Purpose: In building constructions, due to the decrease of local raw materials and for sustainability purpose, beside the need of light pieces to be used in roofing and false ceiling; an alkali-activated mortar is the new development where pozzolanic material is used instead of cement and activated by an alkaline solution. Therefore, in this research, alkali-activated mortar containing unexpanded clay as a fine aggregate with a dry density of 1652 kg/m3, compressive strength of 3.2 MPa, and thermal conductivity of 0.4 (W/m.K) was produced ,also boards were performed in a dimension of 305×152×12 mm as to use them in false ceiling, and reinforced with 0.25 and 0.5% steel fibre to improve their toughness by 370.8% and 1146.1% compared with reference boards, which made them good choice to used them in roofing and secondary ceiling. Design/methodology/approach: For preparation of alkali-activated mortar, low calcium fly ash (FA) was used as a source binder material. In addition, super-plasticizer and unexpanded clay as a fine aggregate (produce from the crushed artificial aggregate) in the ratio of 1:2.75 fly ash/fine aggregate. The paste was prepared by mixing fly ash with an alkali silicate solution, in a solid-to-liquid ratio of 0.4. Alkali silicate activator was prepared by mixing the NaOH and Na2SiO3 solutions at the mass ratios of 2.5. The concentrations of the NaOH was the same molarity of (14M).To improve the mechanical properties of the reference mortar mixture ,steel fibre with 0.25 and 0.5% content were added to the mix .The specimens were tested for water absorption, dry density, compressive strength, flexural strengths, flexural toughness, and thermal conductivity, in addition to the Scanning Electron Microscope test (SEM) for all mortar mixes. Alkali-activated mortar boards with (305×152×12 mm) were prepared and tested for flexural strength and toughness. Findings: The results indicated that the modulus of rupture for mortar boards reinforced with 0.25 and 0.5% steel fibre exhibits an increase of (3.68-12.10)%. In comparison, the toughness is increased by about 370.8% and 1146.1%, respectively, as compared with the reference mortar (without fibre) which made them resistance to accident, in addition to use them in roofing due to their thermal insulation. Research limitations/implications: Further research is needed to make a similar board using another sustainable material. We can examine the thermal insulation that we can get from these board, especially in the building in Iraq which the weather faces high temperatures. Practical implications: There is a by-product that we could get from the electricity station in Iraq. We must study how we get rid of it. Originality/value: This paper investigate how to produce a new light board using artificial aggregate made from unexpanded clay, which has many benefits in building insulation roofing.

Źródło:

Archives of Materials Science and Engineering; 2022, 113, 2; 56--68
1897-2764

Pojawia się w:

Archives of Materials Science and Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 43.

Tytuł:

Optical Transition, Excitation, and Emission Properties of Poly(N-Vinlycarbazole) Blended with Poly(Vinylidene Fluoride-co-Hexafluoropropene) and Polyvinylpyrrolidone

Autorzy:

Alias, A.
Zabidi, Z.
Harun, M.
Yahya, M.
Ali, A.

Powiązania:

https://bibliotekanauki.pl/articles/1401283.pdf

Data publikacji:

2015-04

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

07.60.-j
31.15.bu
81.05.Lg
82.35.Lr

Opis:

We present the results concerning the excitation and emissions spectra of poly(N-carbazole) (PVK) blended with poly(vinylidene fluoride-co-hexafluoropropene), (PVDF-HfP) and polyvinylpyrrolidone (PVP). Thin films of PVK blended with PVDF-HfP (PVK:PVDF-HfP) and PVP (PVK:PVP) were prepared using doctor blade technique on spectrosil substrate. The influences of polymer blends to the excitation and emission spectra were observed under UV excitation source of a xenon lamp. The result shows a discrepancy in the maximum excitation and emission for each samples. The possible energy transfer and recombination mechanisms have been related with singlet-singlet semi-empirical INDO electronic calculation and FTIR measurements.

Źródło:

Acta Physica Polonica A; 2015, 127, 4; 1075-1078
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 44.

Tytuł:

Optical Transition, Excitation, and Emission Properties of Poly(N-Vinlycarbazole) Blended with Poly(Vinylidene Fluoride-co-Hexafluoropropene) and Polyvinylpyrrolidone

Autorzy:

Alias, A.
Zabidi, Z.
Harun, M.
Yahya, M.
Ali, A.

Powiązania:

https://bibliotekanauki.pl/articles/1401439.pdf

Data publikacji:

2015-04

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

07.60.-j
31.15.bu
81.05.Lg
82.35.Lr

Opis:

We present the results concerning the excitation and emissions spectra of Poly (N-carbazole) (PVK) blended with poly(vinylidene fluoride-co-hexafluoropropene), (PVDF-HfP) and polyvinylpyrrolidone (PVP). Thin films of PVK blended with PVDF-HfP (PVK:PVDF-HfP) and PVP (PVK:PVP) were prepared using doctor blade technique on spectrosil substrate. The influences of polymer blends on the excitation and emission spectra were observed under UV excitation source of a xenon lamp. The result shows a discrepancy in the maximum excitation and emission for each sample. The possible energy transfer and recombination mechanisms have been related with singlet-singlet semi-empirical INDO electronic calculation and FTIR measurements.

Źródło:

Acta Physica Polonica A; 2015, 127, 4; 1430-1433
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 45.

Tytuł:

Quantification of taxol by high-performance thin layer chromatography in Taxus wallichiana callus cultivated in vitro

Autorzy:

Mujib, A.
Tonk, D.
Gulzar, B.
Maqsood, M.
Ali, M.

Powiązania:

https://bibliotekanauki.pl/articles/2096321.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

antioxidant enzymes
callus induction
stress
taxol
Taxus wallichiana
2
4-dichlorophenoxyacetic
acid

Opis:

In the present study, the induction of callus, callus biomass growth and the yield of taxol were investigated in Taxus wallichiana. This is the first report of a quantification study of taxol in in vitro grown tissues of Taxus obtained from Jammu and Kashmir provinces, India. For callus induction, three different explant types (leaf, cone and stem) were cultured in media supplemented with 2,4-dichlorophenoxyacetic acid (2,4-D), naphthaleneacetic acid (NAA) and 6-benzylaminopurine (BAP). The stem was most responsive to callusing, and the maximum callus induction frequency of 71.5% was noted on medium amended with 2.0 mg/l 2,4-D. The medium amended with 2,4-D and ascorbic acid (AA) showed better callus growth and the maximum biomass (0.082 g, fresh weight). The yield of taxol was quantified in the callus grown on a medium supplemented with different plant growth regulators (PGRs) by using high-performance thin layer chromatography (HPTLC). The taxol yield was maximum (1.053 μg/g dry weight) in 2,4-D-stimulated callus, followed by callus treated with NAA in which 0.896 μg/g dry weight taxol was detected. The maximum taxol yield (56.6%) was obtained in the callus grown on the medium amended with 2,4-D, and a 33.3% increased yield was noted on the NAA-supplemented medium. As a stress marker, the activities of the antioxidant enzymes superoxide dismutase (SOD) and ascorbate peroxidase (APX) and the level of proline were measured in an auxin (2,4-D and NAA)-supplemented medium. The callus grown on the 2,4-D-supplemented medium had high levels of SOD (3.91 min-1 * mg-1 protein), APX (1.61 min -1 * mg-1 protein) and proline (6.57 mg/g), thus suggesting a higher stress level; the callus grown on the NAA-supplemented medium had slightly lower levels of SOD and APX enzyme activities and proline content (3.01 min-1 * mg -1 protein, 1.04 min-1 * mg -1 protein and 5.90 mg/g, respectively). BAP had little influence on stress parameters. The present study thus indicates a good taxol yield in the callus cultured in 2,4-D, which functioned as a signalling element and a stressor. The taxol yield in response to PGRs was analysed in in vitro cultivated tissues.

Źródło:

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2020, 101, 4; 337-347
0860-7796

Pojawia się w:

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 46.

Tytuł:

Do Foreign Exchange Market Responses to Interest Rate Announcements Evolve over Time? Evidence from Poland
Czy reakcje rynku walutowego na decyzje o stopach procentowych są zmienne w czasie? Wyniki badań z polskiego rynku walutowego

Autorzy:

Brzeszczyński, Janusz
Gajdka, Jerzy
Ali M., Kutan

Powiązania:

https://bibliotekanauki.pl/articles/595948.pdf

Data publikacji:

2018

Wydawca:

Łódzkie Towarzystwo Naukowe

Tematy:

Macroeconomic Announcements, Interest Rate, National Bank of Poland (NBP), Foreign Exchange Rates, Foreign Exchange Market Reactions

Opis:

Rezultaty badań z rynków międzynarodowych wskazują, że reakcje cen instrumentów finansowych w odpowiedzi na decyzje dotyczące polityki pieniężnej są z reguły słabsze w warunkach niskich stóp procentowych. Celem prezentowanej analizy jest weryfikacja, czy podobny efekt występował także w Polsce w czasie, kiedy poziom stóp procentowych zmieniał się z wysokiego do niskiego. Przedmiotem badania w artykule jest rynek walutowy. Głównym narzędziem metodologicznym są modele klasy GARCH ze zmiennymi zero‑jedynkowymi. W przypadku decyzji o zmianie stopy procentowej wyróżnione zostały nominalne zmiany stóp oraz ich odchylenia od oczekiwań. Informacja na temat nieoczekiwanej zmiany stóp procentowych uzyskana została poprzez wyznaczenie różnic pomiędzy rzeczywistą zmianą stopy procentowej, ogłoszoną przez Radę Polityki Pieniężnej NBP oraz jej wartością przewidywaną przez rynek w postaci prognoz pochodzących z ankiet agencji Reutera, przeprowadzanych wśród uczestników rynku finansowego w Polsce. Rezultaty zaprezentowanego badania dowodzą, że w warunkach niższych stóp procentowych kursy walutowe w Polsce reagowały słabiej na decyzje dotyczące ich zmian. Ponadto reakcje kursów walut były silniejsze w przypadku wzrostu stóp niż w przypadku ich obniżenia. Wyniki przedstawionych badań na temat ewoluującej w czasie natury reakcji rynku walutowego w Polsce w okresach wysokich oraz niskich stóp procentowych mogą być pomocne w procesach zarządzania polityką pieniężną poprzez lepsze zrozumienie wpływu tego rodzaju decyzji na rynek walutowy.
Evidence from the international markets shows that the responsiveness of financial instruments’ prices to monetary policy announcements tends to weaken in a low level interest rate environment. The objective of our study is to verify if a similar effect existed in Poland when interest rate decreased from high to low levels over time. The focus of our paper is the currency market. We use GARCH class models with dummy variables as our main methodological tool. In the case of interest rate announcements, we distinguish between the nominal changes in interest rate and surprise changes. The surprise component is extracted by comparing the actual NBP announcements regarding the change of the interest rate with market expectations captured by the consensus forecasts from Reuters surveys of financial market participants in Poland. The results from our study demonstrate that in a lower interest rate environment, the foreign exchange market in Poland has become less responsive to interest rate decisions. We also find evidence that the reactions of foreign exchange rate returns tend to be stronger in case of interest rate changing upwards rather than downwards. Our results about the evolving nature of reactions of the foreign exchange market in Poland in both high and low interest rate environments may provide helpful information for policymakers about the impact of their policy decisions.

Źródło:

Studia Prawno-Ekonomiczne; 2018, 106; 197-219
0081-6841

Pojawia się w:

Studia Prawno-Ekonomiczne

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 47.

Tytuł:

Analysis of a Square Parasitic Antenna by Using Lumped Elements

Autorzy:

Ferchichi, A.
Azizi, M. K.
Ali, G.

Powiązania:

https://bibliotekanauki.pl/articles/227118.pdf

Data publikacji:

2012

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

RFID TAG
parasitic antenna
Lumped element

Opis:

In this paper, a novel approach to design a parasitic antenna for an RFID application. This approach is based on using a parasite square patch near to a square patch. The square antenna is simulated by using HFSS and ADS and the proposed parasitic antenna is developed by using Lumped elements. This antenna can be integrated in an RFID TAG by using the electrical model of both antenna and IC. The size of antenna is 31mm*31mm*8.5mm.

Źródło:

International Journal of Electronics and Telecommunications; 2012, 58, 3; 279-283
2300-1933

Pojawia się w:

International Journal of Electronics and Telecommunications

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 48.

Tytuł:

LMI based stability criterion for uncertain neutral-type neural networks with discrete and distributed delays

Autorzy:

Baskar, P.
Padmanabhan, S.
Syed Ali, M.

Powiązania:

https://bibliotekanauki.pl/articles/2049954.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

stability analysis
neutral networks
Lyapunov method
Linear Matrix Inequality

Opis:

This paper studies the problem of robust stability analysis for uncertain neutral-type neural networks with discrete and distributed delays. By constructing an appropriate Lyapunov- Krasovskii functional, new delay-dependent criteria are obtained. We utilized the free-weighting matrices approach and bounding lemmas to estimate the derivative of the Lyapunov-Krasovskii functional. The stability criterion are established in terms of linear matrix inequalities (LMIs). Finally, a numerical example is presented to illustrate the effectiveness of the proposed method.

Źródło:

Control and Cybernetics; 2020, 49, 1; 77-97
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 49.

Tytuł:

Selection mining methods via multiple criteria decision analysis using TOPSIS and modification of the UBC method

Autorzy:

Ali, Mahrous A.M.
Kim, Jong-Gwan

Powiązania:

https://bibliotekanauki.pl/articles/1839056.pdf

Data publikacji:

2021

Wydawca:

Główny Instytut Górnictwa

Tematy:

TOPSIS
UBC method
mining method selection
multiple criteria decision making
metoda UBC
wybór metod wydobycia
wielokryterialne podejmowanie decyzji

Opis:

Mine designers often face difficulties in selecting an appropriate mining method; however, such a method should be selected based on ore and rock characteristics. The selection of mining methods can be considered a type of multi-criteria decision making, and this depends on many factors used in the selection process. The general method used in this field is the University of British Columbia (UBC) method, which determines the criteria of the properties that are compared to determine the best and worst of several mining methods. In this paper we used as new technique which defines as Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS). The criteria considered in the UBC method include general shape, ore thickness, ore plunge, and grade distribution, beside the rock quality designation (RQD), and the rock substance strength (RSS). This paper presents an improved TOPSIS method based on experimental design. Additionally, this paper will introduce a modified version of the UBC method that can be employed based on Excel sheet. The best mining methods is cut and fill stoping and top slicing with the same rank equal 0.72, and the second-best mining method is square set stoping with rank equal 0.65.

Źródło:

Journal of Sustainable Mining; 2021, 20, 2; 49-55
2300-1364
2300-3960

Pojawia się w:

Journal of Sustainable Mining

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 50.

Tytuł:

Computer Professionals and Carpal Tunnel Syndrome (CTS)

Autorzy:

Ali, K. M.
Sathiyasekaran, B. W. C.

Powiązania:

https://bibliotekanauki.pl/articles/90158.pdf

Data publikacji:

2006

Wydawca:

Centralny Instytut Ochrony Pracy

Tematy:

musculoskeletal disorders
cross-sectional study
occupational disorder
Tinel’s sign
Phalen’s sign
wrist
hand
body mass index
nadgarstek
ręka
praca a choroby
komputer
choroby narządów ruchu
pozycja przy pracy
choroba zawodowa
syndrom cieśni nadgarstka

Opis:

Carpal Tunnel Syndrome (CTS) is an important problem among computer professionals. Hence the prevalence of CTS among computer professionals and risk factors were studied. 648 subjects were selected from 4,276 computer professionals from 21 companies with a simple random sampling method. CTS was diagnosed based on clinical features.The prevalence of CTS was found to be 13.1% (95% CI 10.5–15.7%). Subjects with over 8 years of computer work, over 12 hrs of work per day and system administrators were at a higher risk for CTS (OR 3.3, 4.9 and 2.5 respectively). Flexed or extended hand position had higher risk for CTS. Higher risk for CTS was found with higher exposure to computer work. Ergonomic considerations are important in facilitating proper positioning of hand while working with a computer. Further studies on CTS risk factors among computer professionals are essential for planning prevention.

Źródło:

International Journal of Occupational Safety and Ergonomics; 2006, 12, 3; 319-325
1080-3548

Pojawia się w:

International Journal of Occupational Safety and Ergonomics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 51.

Tytuł:

Miniature size multiband planar patch antenna fabricated on a bioplastic substrate

Autorzy:

Ahsan, M. R.
Islam, M. T.
Ullah, M. H.
Arshad, H.
Ali, M. T.

Powiązania:

https://bibliotekanauki.pl/articles/199786.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

bioplastic substrate material
multiband antenna
planar patch antenna
RFID
C/X band
WiMAX application
substrat
antena szerokopasmowa
C/X
aplikacja WiMAX

Opis:

In this article, a simple design of rectangular microstrip feed planar antenna with wide arcs and square shape slot is proposed for Radio Frequency Identification (RFID),Worldwide Interoperability for Microwave Access (WiMAX) and C/X-band wireless communications. The prototype of the antenna has been fabricated 1.0 mm thick ceramic filled bioplastic substrate by using optimal dimension obtained from design/simulations and antenna performances are experimentally tested. The experimental results confirm the impedance bandwidths for S11 ≤ −10 dB are of 712 MHz (0.355-1.067 GHz), 1.38 GHz (2.92-4.3 GHz) and 2.46 GHz (6.55-9.01 GHz) for 0.788, 3.34 and 8.01 GHz band respectively. The proposed antenna shows almost steady and symmetrical radiation patterns for all three bands with the maximum gains of 1.37, 2.8 and 3.56 dBi respectively. Based on the antenna performances, it can successfully cover the frequency band requirement for RFID, WiMAX and C/X-band applications.

Źródło:

Bulletin of the Polish Academy of Sciences. Technical Sciences; 2015, 63, 4; 971-976
0239-7528

Pojawia się w:

Bulletin of the Polish Academy of Sciences. Technical Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 52.

Tytuł:

The modified Bagdonavičius-Nikulin goodness-of-fit test statistic for the right censored distributional validation with applications in medicine and reliability

Autorzy:

Yousof, Haitham M.
Ali, M. Masoom
Aidi, Khaoula
Ibrahim, Mohamed

Powiązania:

https://bibliotekanauki.pl/articles/18105193.pdf

Data publikacji:

2023-09-08

Wydawca:

Główny Urząd Statystyczny

Tematy:

inverted Weibull distribution
censored validation
Bagdonavičius-Nikulin
goodness-of-fit testing

Opis:

A modified version of Bagdonavičius-Nikulin goodness-of-fit statistical test is presented for validation under the right censor case. Simulation via Barzilai-Borwein algorithm is performed for assessing the right-censorship estimation method. Four right censored data sets are analyzed under the new modified test statistic for checking the distributional validation.

Źródło:

Statistics in Transition new series; 2023, 24, 4; 1-18
1234-7655

Pojawia się w:

Statistics in Transition new series

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 53.

Tytuł:

A new reciprocal Rayleigh extension: properties, copulas, different methods of estimation and a modified right-censored test for validation

Autorzy:

Yousof, Haitham M.
Ali, M. Masoom
Goual, Hafida
Ibrahim, Mohamed

Powiązania:

https://bibliotekanauki.pl/articles/1827545.pdf

Data publikacji:

2021-09-06

Wydawca:

Główny Urząd Statystyczny

Tematy:

Xgamma model
reciprocal Rayleigh model
simulations
bootstrapping
Farlie Gumbel Morgenstern copula
least squares
Cramer-Von-Mises
Ali-Mikhail-Haq copula
convexity
concavi

Opis:

In this article, a new reciprocal Rayleigh extension called the Xgamma reciprocal Rayleigh model is defined and studied. The relevant statistical properties are derived, and the useful results related to the convexity and concavity are addressed. We discussed the estimation of the parameters using different estimation methods such as the maximum likelihood estimation method, the ordinary least squares estimation method, the weighted least squares estimation method, the Cramer-Von-Mises estimation method, and the bootstrapping method. A simulation study was conducted to assess the performances of the proposed estimation methods are investigated through a simulation study. Many bivariate and multivariate type model have also been derived based on Farlie-Gumbel-Morgenstern copula, the Clayton copula, Renyi's entropy copula and the Ali-Mikhail-Haq copula. A modified Nikulin-Rao-Robson test for right-censored validation is applied to a censored real data set.

Źródło:

Statistics in Transition new series; 2021, 22, 3; 99-121
1234-7655

Pojawia się w:

Statistics in Transition new series

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 54.

Tytuł:

An analytical study on organizational creativity : implications for management
Badania analityczne kreatywności organizacyjnej i kreatywnego podejścia do pracy : implikacje dla kreatywności zarządzania

Autorzy:

Sirkova, M.
Ali Taha, V.
Ferencova, M.
Safarik, P. J.

Powiązania:

https://bibliotekanauki.pl/articles/405664.pdf

Data publikacji:

2014

Wydawca:

Politechnika Częstochowska

Tematy:

creativity
creative approach
management
organization
workplace
kreatywność
twórcze podejście
zarządzanie
organizacja
miejsce pracy

Opis:

In dynamically and unpredictably changing environment becomes creativity a key factor of the success of businesses and organizations because it affects the development of innovation and ingenuity, and consequently the business success and profit. The paper analyses the creativity of employees at work. Primary data collection was conducted through questionnaire survey among employees (mostly managers) working in Prešov region. The research was conducted on a sample of 118 respondents from Prešov district in Slovakia. To evaluate the data and hypotheses was used statistical program STATISTIC using the Pearson correlation coefficient (r).
W dynamicznie i nieprzewidywalnie zmieniającym się środowisku kreatywność staje się kluczowym czynnikiem sukcesu przedsiębiorstw i organizacji, ponieważ ma wpływ na rozwój innowacyjności i pomysłowości, a w konsekwencji na sukces w biznesie i zysk. Niniejszy artykuł analizuje kreatywność pracowników w miejscu pracy. Zbieranie podstawowych danych zostało przeprowadzone w formie badania ankietowego wśród pracowników (głównie menedżerów) pracujących w regionie Preszów. Badania przeprowadzono na próbie 118 respondentów z powiatu Preszów na Słowacji. Do oceny danych i hipotezy użyto programu statystycznego STATISTICA wykorzystując współczynnik korelacji Pearsona (r).

Źródło:

Polish Journal of Management Studies; 2014, 10, 2; 179-187
2081-7452

Pojawia się w:

Polish Journal of Management Studies

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 55.

Tytuł:

Some results on centered triangular graceful graphs

Autorzy:

Baskar, M.
Namasivayam, P.
Syed Ali Nisaya, M. P.
Mahendran, S.

Powiązania:

https://bibliotekanauki.pl/articles/1193414.pdf

Data publikacji:

2021

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Centered triangular numbers
centered triangular graceful graphs
centered triangular graceful labeling

Opis:

Let G be a graph with p vertices and q edges. The nth centered triangular number is denoted by C_n, where C_n = 1/2 (3n2 - 3n + 2). A centered triangular graceful labeling of a graph G is a one-to-one function f : V (G) → {0,1,…C_q} that induces a bijection f *: E(G) →{C_1 〖,C〗_2,…C_q} of the edges of G defined by f * (e) = │f(u) - f(v)│, for all e = uv ∊ E(G). The graph which admits such labeling is called a centered triangular graceful graph.

Źródło:

World Scientific News; 2021, 156; 176-191
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 56.

Tytuł:

Comparative Testing of Multibioagent Inoculants to Control Bipolaris spicifera R15 on Rice Plant

Autorzy:

Ali, Hamdia Z.
Abdulrahman, Abdulrahman A.
Abdullah, Ali A.
Saood, Hutham M.

Powiązania:

https://bibliotekanauki.pl/articles/2027993.pdf

Data publikacji:

2021

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

Cladosporium halotolerans
Meyerozyma guilliermondii
multibiocontrol agent

Opis:

The present research deals with greenhouse studies on the efficacy of Cladosporium halotolerans CIR 18_ITS and Meyerozyma guilliermondii MIR 15_ITS compared with a compatible Trichoderma isolate T.4679 to control the phytopathogenic Bipolaris spicifera R15 fungus. An experiment was carried out under controlled conditions in a greenhouse with sterilised soil, and 13 parameters were evaluated. The greenhouse results triggered significant differences [p<0.05] on rice plants after two-month post planting in all treatments compared with the untreated control due to pre-inoculation with three multibiocontrol agents. In addition, results showed the significant interaction amongst three multibiocontrol agents on the growth parameters of the rice plant, fresh weight of shoot and root, dry weight of shoot, root, shoot and root length and greater efficiency of reducing disease severity when treated with the Trichoderma isolate T.4679, M. guilliermondii MIR 15_ITS and C. halotolerans CIR 18_ITS individually or in combination with each other. The greenhouse experiment exhibited that C. halotolerans CIR 18_ITS alone, M. guilliermondii MIR 15_ITS alone, C. halotolerans CIR 18_ITS + C. halotolerans CIR 18_ITS and M. guilliermondii MIR 15_ITS + Trichoderma isolate T.4679 + C. halotolerans CIR 18_ITS + C. halotolerans CIR 18_ITS have greater efficiency of reducing disease infection and severity by approximately 11.11% and 6.67%, respectively, amongst all treatments mentioned.

Źródło:

Journal of Ecological Engineering; 2021, 22, 11; 168-177
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 57.

Tytuł:

Statistical assessment of rainfall variability and trends in northeastern Algeria
Statystyczna ocena zmienności i trendów opadu w północnowschodniej Algierii

Autorzy:

Merniz, Noureddine
Tahar, Ali
Benmehaia, Amine M.

Powiązania:

https://bibliotekanauki.pl/articles/293385.pdf

Data publikacji:

2019

Wydawca:

Instytut Technologiczno-Przyrodniczy

Tematy:

climate change
Mann-Kendall test
northeastern Algeria
precipitation
rainfall trend
opad
północnowschodnia Algieria
test Manna–Kendalla
trend
zmiana klimatu

Opis:

In the present study, time series for annual, monthly rainfall and number of rainy days per year were analysed to quantify spatial variability and temporal trends for 22 rainfall stations distributed in northeastern Algeria for the period 1978– 2010. The Mann–Kendall test and the Sen’s slope estimator were applied to assess the significance and magnitude of the trend. The results showed that precipitation decreases spatially from North to South and from East to West. The application of the Mann–Kendall test (for 0.05% threshold) to the time series data showed that for annual precipitation, no station showed statistically significant trends, unlike the number of rainy days, where there was a significant negative trend in four stations (Jijel, Constantine, Oum El Bouaghi and Tébessa). For the monthly time series, significant positive trends were observed during the months of September in the coastal stations and July for the plateaus and southern Saharan Atlas stations, while significant negative trends were recorded during the months of February and March for the stations of the extreme East in the study area. These results revealed that for the period analysed, there was no significant climate change in northeastern Algeria but there is a seasonal delay having important agroecological implications.
W przedstawionych badaniach analizowano serie rocznych i miesięcznych opadów oraz liczbę dni z deszczem w ciągu roku celem ustalenia przestrzennej zmienności i czasowych trendów w latach 1978–2010 dla 22 stacji pomiarowych rozmieszczonych w północnowschodniej Algierii. Wykorzystano test Manna–Kendalla i estymator Sena do oceny istotności i rozmiaru trendu. Wyniki dowodzą, że opady malały z północy na południe i ze wschodu na zachód. Zastosowanie testu Manna–Kendalla (p < 0,05) do serii danych pomiarowych nie wykazały w żadnej stacji statystycznie istotnych trendów dla rocznych opadów w przeciwieństwie do liczby dni z opadem, które cechował istotny negatywny trend w czterech stacjach pomiarowych (Jijel, Constantine, Oum El Bouaghi i Tébessa). Analiza serii miesięcznych opadów dowiodła występowania dodatniego trendu w odniesieniu do sierpnia w stacjach na wybrzeżu i w odniesieniu do lipca w stacjach na płaskowyżach i w południowym Atlasie Saharyjskim. Istotny trend ujemny uzyskano w przypadku lutego i marca w stacjach na wschodzie badanego obszaru. Wyniki dowodzą, że w analizowanym okresie nie stwierdzono istotnych zmian klimatu w północnowschodniej Algierii, z wyjątkiem sezonowych opóźnień, które wywołują ważne skutki agro-ekologiczne.

Źródło:

Journal of Water and Land Development; 2019, 40; 87-96
1429-7426
2083-4535

Pojawia się w:

Journal of Water and Land Development

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 58.

Tytuł:

Linkage of two mutant allozymes for Amp2 and Aat2 with marker loci on barley [Hordeum vulgare L.] chromosomes 1 and 6

Autorzy:

Kucharska, M
Kaczorowska, K.
Ali, E.S.

Powiązania:

https://bibliotekanauki.pl/articles/2048291.pdf

Data publikacji:

1998

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

chromosome
starch
isoenzyme
barley
linkage
gel electrophoresis
mutant
allozyme
genetic analysis
Hordeum vulgare
genetic marker

Opis:

To saturate barley (Hordeum vulgare L.) genetic maps the linkage relationships of two isoenzyme loci Amp2 (aminopeptydase) and Aat2 (aspartate aminotransferase) with known genetic markers were investigated. Results of the genetic analysis support previous information on the localization of these loci on chromosome 1 and 6, respectively. The following recombination values were estimated: between locus Amp2 and T1-3b translocation break point 13.8 ± 2.1%, between locus Aat2 and translocation T6-7i, 17 ± 3.0% and between locus Aat2 and marker о 24.1 ± 3.0%.

Źródło:

Journal of Applied Genetics; 1998, 39, 2; 147-150
1234-1983

Pojawia się w:

Journal of Applied Genetics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 59.

Tytuł:

Effect of chilling exposure and vapor heat treatment duration on the quality of sweet orange during simulated marketing

Autorzy:

Hussain, I.
Rab, A.
Khan, N.U.
Sajid, M.
Ali, N.
Khan, S.M.
Ali, S.

Powiązania:

https://bibliotekanauki.pl/articles/11543553.pdf

Data publikacji:

2017

Wydawca:

Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie

Opis:

Sweet orange fruits were exposed to vapor heat treatment (50°C) in water bath for 0, 5, 10, 15 and 20 min in plastic covered structure. The data were recorded on different physico chemical factors immediately after the storage and after seven days simulated marketing under ambient condition (20°C). Low temperature storage enhanced weight loss, surface pitting, disease incidence, total soluble solids accumulation, TSS/Acid ratio but decreased reducing sugars, acidity and ascorbic acid content. Chilling exposure up to 45 days had no significant effect on weight loss and TSS. However, increased weight loss (2.63%), TSS (11.75), TSS/Acid ratio (8.45 ºBrix), disease incidence (8.93%) and lowest reducing sugars (3.90) were noted in sweet orange exposed to chilling temperature for 75 days. Among the VHT durations, the highest weight loss (2.29%) was found in VHT for 0 min while the highest TSS (11.81 ºBrix), TSS/Acid ratio (8.10) and disease incidence (6.22%) and least reducing sugars (4.12%) were found in VHT 20 for min. Vapor heat treatment ranging from 5–10 min resulted in lowest weight loss (1.79%), TSS (10.81 ºBrix) TSS/Acid ratio (7.33), disease incidence (1.00%) and highest reducing sugars (4.75%) in sweet orange fruits. However, non-reducing sugars were least affected by both LTSs and VHTs. It is concluded that the chilling exposure (5°C) beyond 45 days aggravated the decline of fruit physio-chemical quality characteristics. Whereas, VHT with 5–10 min maintained the sweet orange fruit quality during simulated marketing; however, VHT of 15–20 min adversely affected the sweet orange fruit quality attributes.

Źródło:

Acta Scientiarum Polonorum. Hortorum Cultus; 2017, 16, 5; 39-47
1644-0692

Pojawia się w:

Acta Scientiarum Polonorum. Hortorum Cultus

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 60.

Tytuł:

Signatures of Late Neoproterozoic Gondwana assembly and Maronian glaciation in Lesser Himalaya: a palaeogeographical and stratigraphical approach

Autorzy:

Umar, M.
Betts, P.
Khan, M. M. S.
Sabir, M. A.
Farooq, M.
Zeb, A.
Jadoon, U. K.
Ali, S.

Powiązania:

https://bibliotekanauki.pl/articles/139442.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Neoproterozoic
palaeogeography
Glaciation
Rodinia break-up
Lesser Himalaya
neoproterozoik
paleogeografia
zlodowacenie
Rodinia
rozpad
Himalaje Małe

Opis:

Stratigraphical and sedimentological analyses of Late Neoproterozoic successions in Lesser Himalaya are combined herein with palaeogeographical considerations and comparisons with equivalent successions in India and South China. The succession starts with the Hazara Formation, which contains complete and incomplete Bouma sequences suggesting its deposition in deep marine turbidite settings. The overlying Tanawal Formation, rich in massive sandstone, shale and siltstone, was deposited in shallow marine conditions, as indicated by the presence of parallel lamination, large scale tabular, trough cross- and hummocky cross-stratifications. The Tanawal Formation facies shift laterally from proximal (south-southeast) to distal (north-northwest). The glaciogenic Tanaki Boulder Bed, overlying the Tanawal Formation, was deposited during the Maronian glaciation. It is equivalent to the Blaini Formation of India, and to the Sinian diamictites of South China. The Abbottabad Formation of Cambrian age overlies the Tanaki Boulder Bed, and is composed of dolomite, chert nodules and phosphate-rich packages; similar successions are documented in India and South China at the same stratigraphical interval. The similarities of the Neoproterozoic successions of Lesser Himalaya (both in Pakistan and India) and South China suggests their possible proximity during the break-up of Rodinia and the assembly of the Gondwana Supercontinent.

Źródło:

Acta Geologica Polonica; 2015, 65, 1; 1-19
0001-5709

Pojawia się w:

Acta Geologica Polonica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 61.

Tytuł:

Protoplast isolation and plant regeneration in two cultivated coriander varieties, Co-1 and RS

Autorzy:

Ali, M.
Mujib, A.
Zafar, N.
Tonk, D.

Powiązania:

https://bibliotekanauki.pl/articles/80271.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

plant regeneration
Coriandrum sativum
coriander
cultural variety
plant growth regulator
2,4-dichlorophenoxyacetic acid
6-benzyladenine
alpha-naphthalene acetic acid
gibberellic acid
callus induction
somatic embryogenesis

Źródło:

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2018, 99, 4
0860-7796

Pojawia się w:

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 62.

Tytuł:

Experimental study of the mechanical and corrosion properties of ethyl silicate resin applied on low carbon steel

Autorzy:

Ali, M.
Mohmmed, J.H.
Zainulabdeen, A.A.

Powiązania:

https://bibliotekanauki.pl/articles/2175789.pdf

Data publikacji:

2021

Wydawca:

Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach

Tematy:

ethyl silicate resin
polymer coating
low carbon steel
żywica etylokrzemianowa
powłoka polimerowa
stal niskowęglowa

Opis:

Purpose: This work aimed at evaluating the properties of the ethyl silicate-based coating that can be applied on low carbon steel. Design/methodology/approach: Two mixture ratio types (2:1, and 3:2) of resin and hardener respectively were used to prepared two specimen models (A and B). Findings: It found that some mechanical properties (tensile, hardness, and impact strength) of ethyl silicate resin were evaluated according to standard criteria. Research limitations/implications: The effect of heat treatments at various temperatures (100, 150, and 200°C) and holding at different times (10, 20 & 30) min on hardness was investigated. Practical implications: Moreover, an open circuit potential corrosion test with a solution of 3.5% Sodium Chloride at room temperature and 60°C was used to determine the corrosion resistance of low carbon steel specimens coated with the two mixture types. Originality/value: The effects of mixture ratios (for resin and hardener) and heat treatment conditions on properties of ethyl silicate-based coating were studied. From obtained results, acceptable values of tensile, hardness, and toughness were recorded. Increasing heat treatment temperature and holding time leads to enhance hardness for both model types. An open circuit potential (OCP) tests show that there is an enhancement of protective properties of ethyl silicate coatings with mixture type B in comparison with type A was achieved. Generally, the results indicate that specimen model B has higher properties as compared with specimen model A.

Źródło:

Archives of Materials Science and Engineering; 2021, 108, 2; 68--74
1897-2764

Pojawia się w:

Archives of Materials Science and Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 63.

Tytuł:

Dynamic modeling of the isoamyl acetate reactive distillation process

Autorzy:

Ali, S. S.
Hossain, SK. S.
Asif, M.

Powiązania:

https://bibliotekanauki.pl/articles/778351.pdf

Data publikacji:

2017

Wydawca:

Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie

Tematy:

reactive distillation
process simulator
isoamyl acetate
dynamic modeling
disturbance

Opis:

The cost-effectiveness of reactive distillation (RD) processes makes them highly attractive for industrial applications. However, their preliminary design and subsequent scale-up and operation are challenging. Specifically, the response of RD system during fluctuations in process parameters is of paramount importance to ensure the stability of the whole process. As a result of carrying out simulations using Aspen Plus, it is shown that the RD process for isoamyl acetate production was much more economical than conventional reactor distillation configuration under optimized process conditions due to lower utilities consumption, higher conversion and smaller sizes of condenser and reboiler. Rigorous dynamic modeling of RD system was performed to evaluate its sensitivity to disturbances in critical process parameters; the product flow was quite sensitive to disturbances. Even more sensitive was product composition when the disturbance in heat duties of condenser or reboiler led to a temperature decrease. However, positive disturbance in alcohol feed is of particular concern, which clearly made the system unstable.

Źródło:

Polish Journal of Chemical Technology; 2017, 19, 1; 59-66
1509-8117
1899-4741

Pojawia się w:

Polish Journal of Chemical Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 64.

Tytuł:

Fruit yield and quality of ‘Florida King’ peaches subjected to foliar calcium chloride sprays at different growth stages

Autorzy:

Shahid, M.O.
Muhmood, A.
Ihtisham, M.
Rahman, M.ur
Amjad, M.
Sajid, M.
Riaz, K.
Ali, A.

Powiązania:

https://bibliotekanauki.pl/articles/12704034.pdf

Data publikacji:

2020

Wydawca:

Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie

Opis:

Peach fruit and trees are prone to various issues, regarding yield, quality and pest attack. Calcium plays several roles in plant and fruit development. Therefore the current study was conducted to evaluate the response of peach fruit to foliar application. The experiment was laid out in Randomized Complete Block Design with two factors factorial arrangement and three replicates. Calcium chloride was applied at the rate of 0, 1, 2 and 3%. The foliar application of calcium was done at pink bud stage, berry size fruit stage, and then at pit hardening stage of peach. The obtained results indicated that foliar application of calcium significantly improved peach fruit quality and yield. The highest fruit weight (142.6 g), yield tree⁻¹ (15.6 kg), ascorbic acid content (6.67 mg∙100 g⁻¹), total soluble solids (11.0°Bx), fruit juice pH (3.98), sugar to acid ratio (45.1), fruit firmness (3.90 kg∙cm⁻²) and fruit volume (155.6 cm³) was obtained with the application of 3% solution of calcium chloride at pit hardening stage but it significantly reduced the percent titratable acidity (0.3%) and disease incidence (5.8%). It was concluded that 3% calcium chloride applied at the pit hardening stage significantly boosted peach quality and fruit yield.

Źródło:

Acta Scientiarum Polonorum. Hortorum Cultus; 2020, 19, 1; 131-139
1644-0692

Pojawia się w:

Acta Scientiarum Polonorum. Hortorum Cultus

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 65.

Tytuł:

An Analysis of the Electron Density and Drift Rate of Solar Burst Type III During 13th of May 2015

Autorzy:

Ali, M. O.
Hamidi, Z. S.
Shariff, N. N. M.
Monstein, C.

Powiązania:

https://bibliotekanauki.pl/articles/1192997.pdf

Data publikacji:

2016

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Coronal Mass Ejections (CMEs)
Sun
X-ray region
radio region
solar burst
solar flare
type III

Opis:

During 13th of May 2015, the solar wind is very high velocity, which is 733 kms-1 as compared to 367.5 kms-1. It is believed that the plasma–magnetic field interactions in the solar corona can produce suprathermal electron populations over periods from tens of minutes to several hours, and the interactions of wave-particle and wave-wave lead to characteristic fine structures of the emission. An intense and broad solar radio burst type II was recorded by CALLISTO spectrometer from 20-85 MHz. Using data from a the Blein observatory, the complex structure of solar burst type III can also be found in the early stage of the formation of type III solar burst type event due to active region AR 12339. The drift rate of solar burst type III exceeds 1.0 MHz/s with 6.318 x1012 e/m3 a density of electron in the solar corona. There were also 2 groups of solar radio burst type III were observed. This CME was detected at 08:36 UT which is 1and ½ hour after the solar burst detected. This event shows a strong radiation in radio region, but not in X-ray region.

Źródło:

World Scientific News; 2016, 31; 1-11
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 66.

Tytuł:

Synthesis and use of TiO2@rGo nanocomposites in photocatalytic removal of chromium and lead ions from wastewater

Autorzy:

Al-Qahtani, K.M.
Ali, M.H.H.
Al-Afify, A.G.

Powiązania:

https://bibliotekanauki.pl/articles/15465.pdf

Data publikacji:

2020

Wydawca:

Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza

Źródło:

Journal of Elementology; 2020, 25, 1
1644-2296

Pojawia się w:

Journal of Elementology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 67.

Tytuł:

Comparative growth kinetic study of Newcastle disease virus, infectious bursal disease virus and avian influenza virus in chicken embryo fibroblast and DF-1 cell lines

Autorzy:

Anam, S.
Rahman, S.U.
Ali, S.
Saeed, M.
Goyal, S.M.

Powiązania:

https://bibliotekanauki.pl/articles/2087170.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

cytopathic effect
titer
growth kinetic
vaccine production

Źródło:

Polish Journal of Veterinary Sciences; 2021, 24, 2; 287-292
1505-1773

Pojawia się w:

Polish Journal of Veterinary Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 68.

Tytuł:

Zinc and graphene oxide composites as new protective coatings for oil and gas pipes
Kompozyty cynku i tlenku grafenu jako nowe powłoki ochronne rur do przesyłu nafty i gazu

Autorzy:

Asghar, M. Sajid Ali
Amir, Muhammad
Hussain, Umer
Sabri, Mohammed M.

Powiązania:

https://bibliotekanauki.pl/articles/24202808.pdf

Data publikacji:

2023

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej

Tematy:

corrosion resistance
graphene oxide
Hummers method
nanocomposites
electrophoretic deposition
odporność na korozję
tlenek grafenu
metoda Hummersa
nanokompozyty
osadzanie elektroforetyczne

Opis:

A method was developed to obtain a durable coating consisting of zinc and graphene oxide (Zn-GO) in order to reduce the mechanical wear and tear rate of oil and gas pipelines made of steel. Graphene oxide was obtained from graphite by wet chemical oxidation (unmodified and modified Hummers’ method) using potassium permanganate and sulfuric acid. The process was carried out at various temperatures. The steel was covered with an ultrathin layer of Zn-GO using the electrophoretic deposition method. The GO particle size (< 90 nm) was confirmed by XRD and laser analysis. For GO particles obtained by the modified Hummers’ method, a significant correlation was observed in the scratch (R2 = 0.87) and the Vickers microhardness tests (R2 = 0.93), which indicates a lower wear rate of Zn-GO-coated steel.
Opracowano metodę otrzymywania trwałej powłoki składającej się z cynku i tlenku grafenu (Zn-GO) w celu zmniejszenia zużycia mechanicznego rurociągów naftowo-gazowych wykonanych ze stali. Tlenek grafenu pozyskano z grafitu metodą mokrego utleniania chemicznego (niezmodyfikowana i zmodyfikowana metoda Hummersa) z użyciem nadmanganianu potasu i kwasu siarkowego. Proces prowadzono w różnej temperaturze. Stal powlekano ultra cienką warstwą Zn-GO techniką osadzania elektroforetycznego. Metodą XRD i analizą laserową potwierdzono wielkość cząstek GO (≤ 90 nm). Dla cząstek GO otrzymanych zmodyfikowaną metoda Hummersa zaobserwowano znaczącą korelację w teście zarysowania (R2 = 0.87) i mikrotwardości Vickersa (R2 = 0.93), co świadczy o mniejszym stopniu zużycia stali pokrytej powłoką Zn-GO.

Źródło:

Polimery; 2023, 68, 7-8; 378--385
0032-2725

Pojawia się w:

Polimery

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 69.

Tytuł:

Production of bioactive metabolites from different marine endophytic Streptomyces species and testing them against methicillin-resistant Staphylococcus aureus (MRSA) and cancer cell lines

Autorzy:

El-Gendy, M.M.A.A.
Mohamed, Z.K.
Hekal, N.Z.
Ali, F.M.
Yousef, A.E.M.

Powiązania:

https://bibliotekanauki.pl/articles/81078.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Staphylococcus aureus
infection
methicillin-resistant Staphylococcus aureus
endophyte
Streptomyces
bioactive metabolite
Actinomycetes
marine invertebrate
anticancer activity
cancer cell line
lung cancer

Źródło:

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2018, 99, 1
0860-7796

Pojawia się w:

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 70.

Tytuł:

Second order triangular graceful graphs

Autorzy:

Sakthi Sankari, R.
Syed Ali Nisaya, M. P.

Powiązania:

https://bibliotekanauki.pl/articles/1193377.pdf

Data publikacji:

2021

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Second order triangular graceful graph
Second order triangular graceful labeling
Second order triangular number

Opis:

Let G=(V,E) be a graph with p vertices and q edges. A second order triangular graceful labeling of a graph G is an one to one function φ:V(G)→{0,1,2,…,B_q} where B_q is the qth second order triangular number, ie., B_q=1/6 q(q+1)(2q+1), that induces a bijection φ^*:E(G)→{B_1,B_2,…,B_q} of the edges of G defined by φ^* (uv) =|φ(u)-φ(v)| ∀ e=uv ∈E(G). A graph which admits such labeling is called a second order triangular graceful graph. In this paper, we introduce second order triangular graceful labeling and we prove that star, subdivision of star, nK_1,3, nK_2, bistar, path, comb, coconut tree, shrub and Y-tree are second order triangular graceful graphs.

Źródło:

World Scientific News; 2021, 155; 140-154
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 71.

Tytuł:

Higher order triangular graceful labeling of some graphs

Autorzy:

Sakthi Sankari, R.
Syed Ali Nisaya, M. P.

Powiązania:

https://bibliotekanauki.pl/articles/1193398.pdf

Data publikacji:

2021

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

fifth order
fifth order triangular graceful graph
fifth order triangular graceful labeling
fifth order triangular numbers
fourth order
third order

Opis:

A (p, q) graph G is said to admit higher order triangular graceful labeling if its vertices can be labeled by the integers from 0 to qth higher order triangular numbers such that the induced edge labels obtained by the absolute difference of the labels of end vertices are the first q higher order triangular numbers. A graph G which admits higher order triangular graceful labeling is called a higher order triangular graceful graph. In this paper, third order, fourth order, fifth order triangular graceful labeling are introduced and third order, fourth order, fifth order triangular graceful labeling of star graph, subdivision of star, nK_2, path, comb, bistar, coconut tree, nK_1,3 are studied.

Źródło:

World Scientific News; 2021, 156; 40-61
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 72.

Tytuł:

Performance of Symmetric Key Cryptography Algorithms in Cloud Storage

Autorzy:

Osman, Hind
Ibrahim, Sara M.
Ali, Elmustafa Sayed

Powiązania:

https://bibliotekanauki.pl/articles/1161999.pdf

Data publikacji:

2018

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

AES
BLOWFISH
Cloud Computing
DES
Google Drive Storage
NetBeans

Opis:

Today cloud computing becomes one of the most attractive topics due to the wide opportunities that is provided which aims to enhance the electronic services to a higher-level providing cost saving, expanding possibilities, storage in demand and the huge intake capability as well. Security is one of the most important process that should be implemented in every cloud structure level, especially with data in case of processing or storing to keep it save from unauthorized access to overcome the security challenges and difficulties, which face both provider and users in cloud. In this paper a study to compare the security algorithms for encryption/decryption files has been done to evaluate the performance impact with memory capacity, processing time and algorithms running time. The comparison has been done between three encryption algorithms AES, DES, and Blowfish to determine the performance of each one in cloud storage. From the experimental results we found that DES is faster in running time compared to other algorithms as well as AES considered to be the safest one in data protection.

Źródło:

World Scientific News; 2018, 112; 244-251
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 73.

Tytuł:

Theoretical Semiempirical Study of the Nitrone (Anticancer Drug) Interaction with Fullerene C60 (as Delivery)

Autorzy:

Al-Anber, M.
Al-Mowali, A.
Ali, A.

Powiązania:

https://bibliotekanauki.pl/articles/1205272.pdf

Data publikacji:

2014-08

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

87.15.Aa

Opis:

Modelling of the quantum interaction properties of nitrone on the fullerene C60 has been investigated by the use of PM3 calculations. It has been found that the interaction potential of the nitrone with the fullerene C60 led to stable complexes when the fullerene reacted with the carbon atom ($C^1$-centered) and metastable conformations with carbon atom ($C^2$-centered). We have studied the effect of two rotation characteristics (nitrone and $NOCH_2$ group) on the binding between the fullerene C60 with the nitrone. Our results suggested that the binding energy is lower as the nitrone rotation increases and the $NOCH_2$ group rotation showed more effect. The fullerene C60 may be able to do more linking with molecules of nitrone.

Źródło:

Acta Physica Polonica A; 2014, 126, 3; 845-848
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 74.

Tytuł:

Design and development of a semi-active suspension system for a quarter car model using PI controller

Autorzy:

Siswoyo, H.
Mir-Nasiri, N.
Ali, M. H.

Powiązania:

https://bibliotekanauki.pl/articles/385074.pdf

Data publikacji:

2017

Wydawca:

Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów

Tematy:

semi-active suspension
control
damper
road profile
vibration

Opis:

This paper presents the design and development of a semi-active suspension system for a vehicle. The main idea is to develop a system that is able to damp vibration of the vehicle body while crossing the bumps on the road. This system is modeled for a single wheel assembly and then the laboratory prototype of the complete system has been manufactured. It is used to physically simulate the spring-mass-damper system in vehicle and observe the frequency response to the external disturbances. The developed low-cost smart experimental equipment consists of a motor with offset mass which works as an oscillator to induce vibration, a spring-mass-damper system where the variable damper works as a pneumatic cylinder that allows varying the damping constant (c). Proportional-Integral (PI) controller is used to control the damping properties of the semi-active suspension system automatically. The system is designed in contrast to the most of the available suspension systems in the market that have only passive damping properties. The results of this research demonstrate the efficiency of the developed variable damper-based control system for the vehicle suspension system.

Źródło:

Journal of Automation Mobile Robotics and Intelligent Systems; 2017, 11, 4; 26-33
1897-8649
2080-2145

Pojawia się w:

Journal of Automation Mobile Robotics and Intelligent Systems

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 75.

Tytuł:

Chemical Constituents and Insecticidal Activity of Senna italica Mill. from the Sudan

Autorzy:

Yagi, S.
El Tigani, S.
Ali, M.
Elkhidir, I.
Mohammed, A. M. A.

Powiązania:

https://bibliotekanauki.pl/articles/412035.pdf

Data publikacji:

2013

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Senna italica
Fabaceae
Caesalpiniaceae
sennosides
anthraquinone
bianthrones
insecticidal activity

Opis:

The chemical constituents and insecticidal activity of the pods of Senna italica (Caesalpiniaceae, Fabaceae) were investigated. From the chloroform extract of pods, physcion, chrysophanol, chrysophanol-10,10′-bianthrone, chrysophanol-physcion bianthrone and chrysophanol-isophyscion bianthrone, were isolated and characterized using different spectral methods. The GC-MS of the n-hexane extract revealed that the major chemical constituents of the oil were 2,6,-di-sec-butylphenol (36.69 %), di-n-octylphthalate (12.06 %), eicosane (5.46 %), tetratriacontane (4.87 %) and 2,2'-methylenebis[6-(1,1-dimethyl)-4-methylphenol (4.18 %). The n-hexane extract showed potent insecticidal activity (100 %) against Callosbruchus analis F. This study suggests that S. italica pods cannot be a source of sennosides but for other bioactive compounds.

Źródło:

International Letters of Chemistry, Physics and Astronomy; 2013, 9, 2; 146-151
2299-3843

Pojawia się w:

International Letters of Chemistry, Physics and Astronomy

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 76.

Tytuł:

Phytoextraction of Cr by maize (Zea mays L.) : the role of plant growth promoting endophyte and citric acid under polluted soil

Autorzy:

Ali, J.
Mahmood, T.
Hayat, K.
Afridi, M. S.
Ali, F.
Chaudhary, H. J.

Powiązania:

https://bibliotekanauki.pl/articles/204568.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

maize
phytoextraction
chromium
citric acid
Burkholderia vietnamiensis

Opis:

High chromium (Cr) toxicity has turned into a serious environmental concern. Cr contaminated agronomic soils negatively affect the growth and yield of crops. Current research was conducted to enhance the phytoextraction potential of maize by using Burkholderia vietnamiensis and citric acid (CA). Plants were subjected to three concentrations of Cr (0.86, 350, and 500 ppm). A pot experiment was conducted under greenhouse conditions with completely randomized design (CRD). After 72 days of experiment, plants were harvested to analyze the morphological and biochemical attributes of soil, bacteria and plant. Results revealed that plant fresh, dry biomass, root, shoot length and chlorophyll contents significantly increased by 56%, 50%, 58%, 78% and 60%, respectively, at 500 ppm Cr concentration in combine treatment of B. vietnamiensis and CA. Maize plants treated with both B. vietnamiensis and CA significantly increased the bioaccumulation (BA) of Cr up to 50% and translocation factor (TF) by 31%. Furthermore, superoxide dismutase (SOD), proline and peroxidase dismutase (POD) activities in leaves were markedly increased by 30%, 42% and 15%, respectively, when treated with CA. Current study reveals that exogenous co-application of B. vietnamiensis + CA enhance plant growth by alleviating heavy metal stress and accelerate the phytoextraction of Cr. Taking into account the heavy metal tolerance and accumulation capacity, Zea mays is suitable for phytoremediation of contaminated soils in combination with B. vietnamiensis and CA.

Źródło:

Archives of Environmental Protection; 2018, 44, 2; 73-82
2083-4772
2083-4810

Pojawia się w:

Archives of Environmental Protection

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 77.

Tytuł:

Review of mechanical vapour compression refrigeration system part 2: performance challenge

Autorzy:

Mahmood, R. A.
Ali, O. M.
Al-Janabi, A.
Al-Doori, G.
Noor, M. M.

Powiązania:

https://bibliotekanauki.pl/articles/2106451.pdf

Data publikacji:

2021

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

para
układ chłodniczy
współczynnik wydajności
vapour compression
refrigeration system
cycle
coefficient of performance COP

Opis:

Reducing energy consumption and providing high performance for a vapour compression refrigeration system are big challenges that need more attention and investigation. This paper provides an extensive review of experimental and theoretical studies to present the vapour compression refrigeration system and its modifications that can be used to improve system’s performance and reduce its energy consumption. This paper also presents the challenges that can be considered as a gab of research for the future works and investigations. Cooling capacity, refrigerant effect, energy consumption can be improved by using vapour injection technique, natural working fluid, and heat exchanger. Based on the outcome of this paper, vapour injection technique using natural refrigerant such as water can provide ultimate friendly refrigeration system. Future vision for the vapour compression refrigeration system and its new design technique using Computational Fluid Dynamic (CFD) is also considered and presented.

Źródło:

International Journal of Applied Mechanics and Engineering; 2021, 26, 3; 119--130
1734-4492
2353-9003

Pojawia się w:

International Journal of Applied Mechanics and Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 78.

Tytuł:

Reverse osmosis as one-step wastewater treatment: a case study on groundwater pollution

Autorzy:

Ali, W.
Rehman, W. U.
Younas, M.
Ahmad, M. I.
Gul, S.

Powiązania:

https://bibliotekanauki.pl/articles/779416.pdf

Data publikacji:

2015

Wydawca:

Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie

Tematy:

reverse osmosis (RO)
membrane separation
Total Dissolved Solids (TDS)
Total Coliform
E. Coli

Opis:

The present case study is focused on performance evaluation of a Reverse Osmosis (RO) membrane based pilot plant to treat the ground/surface drinking water sources polluted by flood, rivers and/or canals. The RO plant was designed, fabricated and then operated with polluted water. Two feed water samples having a TDS of 2.000 mg · L−1 and 10.000 mg · L−1 respectively, were taken and analyzed for physical, chemical and microbiological contaminants. The RO plant was run once through over a span of 100 hrs at an operating pressure of 15 bar. TDS rejections were found to be more than 94% while permeate flux was measured to be 25.82 L · m−2 · hr−1 to 40.55 L · m−2 · hr−1. Results show that RO plant has a potential to remove physical, chemical and microbiological contaminants like Total Coliform and E. Coli in one step.

Źródło:

Polish Journal of Chemical Technology; 2015, 17, 4; 42-48
1509-8117
1899-4741

Pojawia się w:

Polish Journal of Chemical Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 79.

Tytuł:

Detailed evaluation and analysis of vision-based online traffic parameters estimation approach using low resolution web cameras

Autorzy:

Ali, M.
Touko Tcheumadjeu, L.
Zuev, S.
Ruppe, S.

Powiązania:

https://bibliotekanauki.pl/articles/393806.pdf

Data publikacji:

2014

Wydawca:

Polskie Stowarzyszenie Telematyki Transportu

Tematy:

background estimation
vehicle detection
time mean speed
traffic flow
traffic state
classification
estymacja tła
detekcja pojazdu
płynność ruchu
stan ruchu
klasyfikacja

Opis:

In this paper, we give an overview and a detail analysis of our approach for vision-based real-time traffic parameters estimation using low-resolution web cameras. Traffic parameters estimation approach mainly includes three major steps, (1) stable background estimation, (2) vehicle detection, mean speed and traffic flow estimation, and (3) traffic scene classification into three states (normal and congested). The background image is estimated and updated in realtime by novel background estimation algorithm based on the median of First-in-First-Out (FIFO) buffer of rectified traffic images. Vehicles are detected by background subtraction followed by post-processing steps. By exploiting the domain knowledge of real-world traffic flow patterns, mean speed and traffic flow can be estimated reliably and accurately. Naive Bayes classifier with statistical features is used for traffic scene classification. The traffic parameter estimation approach is tested and evaluated at the German Aerospace Center’s (DLR) urban road research laboratory in Berlin for 24 hours of live streaming data from web-cameras with frames per second 1, 5 and 10. Image resolution is 348 x 259 and JPEG compression is 50%. Processed traffic data is cross-checked with synchronized induction loop data. Detailed evaluation and analysis shows high accuracy and robustness of traffic parameters estimation approach using low-resolution web-cameras under challenging traffic conditions.

Źródło:

Archives of Transport System Telematics; 2014, 7, 2; 9-13
1899-8208

Pojawia się w:

Archives of Transport System Telematics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 80.

Tytuł:

Consequences of Mercury Used by Artisanal and Small-Scale Gold Mining Processes a Case of River Nile State Sudan

Autorzy:

Ahmed, Ali M.A.
Purwanto, Purwanto
Sunoko, Henna Rya

Powiązania:

https://bibliotekanauki.pl/articles/124413.pdf

Data publikacji:

2019

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

artisanal gold mining
small-scale gold mining
workers occupationally exposed
WOE
residents in surrounding communities
RSC
distribution of mercury concentration
surface soil
surface water
meteorological factors
topographical factors

Opis:

On the discovery of gold reserves in 14 states in Sudan, traditional gold mining suddenly started to flourish and hundreds of thousands of laymen became engaged in gold extraction. The new source of revenue generation added much to the empty treasury and the loss in petroleum revenue due to cessation of the south in 2011 could thus be compensated. Since gold extraction by artisanal and small-scale gold mining does not require much finance or advanced technology, it suited unskilled workers and many young people found their way into the new business. Although gold extraction generates high revenues, the use of mercury in gold extraction poses much threat to the environment and general health of miners and the surrounding areas. The research tries to investigate the effects of traditional gold mining in Alebedia area, Berber Locality in the River Nile State. The investigation includes A/ the effects of extraction methods on the environment and general health. B/ the level of education and its distribution within the miners and how it affected the awareness of the miners about the dangers of mining activities. C/ the period of stay that miners spend in the mining area its contribution on the awareness about the dangers and diseases inflicted on the miners, D/ the effects of traditional gold mining activities on natural environmental impacts and E/ the effects of the meteorological and topographical factors, the distribution and concentration of mercury in the area and their effects on the environment and general health. The research adopted the techniques of using random sampling and quantitative qualitative in addition to the analytical techniques. The research finally concluded that traditional gold mining has positive effects on the economic side and negative effects on the environment and general health.

Źródło:

Journal of Ecological Engineering; 2019, 20, 2; 106-115
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 81.

Tytuł:

Slowing of optical signals in generalized Cantor structure

Autorzy:

Ben Ali, N.
Yusoff, W.
Trabelsi, Y.
Kanzari, M.

Powiązania:

https://bibliotekanauki.pl/articles/174486.pdf

Data publikacji:

2018

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

slow of light
optic communication
photonic
generalized Cantor
slowing down factor

Opis:

In this paper, a simulation study of the slowing optical signals in generalized Cantor structure is proposed. The materials constituting the structure’s layers are SiO₂ and the TiO₂. The slowing down factor is determined using the transfer matrix method whose purpose is to study the slowing of light. We show that the slowing down factor value depends on the generalized Cantor parameters (a, b and c) and the reference wavelength λ₀. These parameters are optimized to better slowing the optical signals, minimize the number and the thickness of structure’s layers. At the end of the paper we compare our results with previous research work.

Źródło:

Optica Applicata; 2018, 48, 1; 65-73
0078-5466
1899-7015

Pojawia się w:

Optica Applicata

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 82.

Tytuł:

Numerical analysis of the compositional graded quaternary barrier AlGaN-based ultraviolet-C light-emitting diode

Autorzy:

Malik, S.
Usman, Muhammad
Hussain, M.
Munsif, M.
Khan, S.
Rasheed, S.
Ali, S.

Powiązania:

https://bibliotekanauki.pl/articles/1818198.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich

Tematy:

ultraviolet
light-emitting diodes
efficiency
quantum wells

Opis:

The compositional graded quaternary barriers (GQBs) instead of ternary/conventional quantum barriers (QBs) have been used to numerically enhance the efficiency of AlGaN-based ultraviolet light-emitting diode (LED). The performance of LED with GQBs is examined through carrier concentrations, energy band diagrams, radiative recombination, electron and hole flux, internal quantum efficiency (IQE), and emission spectrum. As a function of the operating current density, a considerable reduction in efficiency droop is observed in the device with composition-graded quaternary barriers as compared to the conventional structure. The efficiency droop in case of a conventional LED is ~77% which decreased to ~33% in case of the proposed structure. Moreover, the concentration of electrons and holes across the active region in case of the proposed structure is increased to ~156% and ~44%, respectively

Źródło:

Opto-Electronics Review; 2021, 29, 3; 80--84
1230-3402

Pojawia się w:

Opto-Electronics Review

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 83.

Tytuł:

Foliar application of nutrient for augmentation of rhizospheric heavy metal stress – growth and productivity of canola (Brassica napus L.) measured with indices

Autorzy:

Ahmad, A.
Saima, S.
Parveen, M.
Ali, E.
Arif, M.
Yasin, G.
Akmal, F.

Powiązania:

https://bibliotekanauki.pl/articles/54103073.pdf

Data publikacji:

2023

Wydawca:

Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza

Opis:

The experiment was conducted on three cultivars of canola (Brassica napus L.): Exceed, Cyclone and Legend, with the objective of investigating the alleviation of the rhizospheric lead toxicity by exogenous potassium. Seeds were germinated in pots and when plants were twenty-day-old, lead @15.0 and 30.0 mg kg^-1 soil was added to pots. Plants were foliar sprayed twice with KCl solution. Plants were arranged in a completely randomized design. Various growth and production parameters were evaluated at physiological maturity. The fresh and dry weight of stems increased by 17.6% and 25.6%, correspondingly, when the plants were treated with KCl as compared to the control, but decreased by 20.4%, and 13.9%, respectively, in plants treated with 15.0 mg kg^-1 of lead. These reductions in weight were higher under 30.0 mg kg^-1 of lead applications. Roots (fresh and dry weight) of plants under the dual combination of lead and potassium decreased but this reduction was lower than in plants treated with lead only, which confirmed that potassium alleviated the toxic effect of the lead metal. The seeds (number and total yield) also decreased due to lead toxicity. The seeds (number and total yield) of plants under the dual combination of lead and potassium decreased, but this reduction was lower than in plants treated with lead only, which proved that potassium alleviated the toxic effect of lead.

Źródło:

Journal of Elementology; 2023, 28, 1; 145-159
1644-2296

Pojawia się w:

Journal of Elementology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 84.

Tytuł:

Biosorption of some toxic metals from aqueous solution using non-living algal cells of Chlorella vulgaris

Autorzy:

Goher, M.E.
Abd El-Monem, A.M.
Abdel-Satar, A.M.
Ali, M.H.
Hussian, A.-E.M.
Napiorkowska-Krzebietke, A.

Powiązania:

https://bibliotekanauki.pl/articles/13619.pdf

Data publikacji:

2016

Wydawca:

Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza

Opis:

Dead cells of Chlorella vulgaris were used experimentally to remove cadmium (Cd2+), copper (Cu2+) and lead (Pb2+) ions from aqueous solution under various conditions of pH, biosorbent dosage and contact time. C. vulgaris was isolated from Lake Manzala, (Egypt) and then cultivated outdoors, in growth media, maintaining pH of nearly 7.5. After cultivation, the cells were harvested by coagulation and prepared to make an experiment with different variants of pH, contact time and adsorbent dose. The adsorption specific characteristics of C. vulgaris were examined using Fourier Transformation Infrared Spectroscopy (FTR) and Scanning Electron Microscopy (SEM). The FTIR and SEM data showed vibration frequency changes for the peaks corresponding to the surface functional groups and morphological changes of C. vulgaris, respectively, after its exposure to metal ion solution. The maximum removal efficiency for copper and lead at ambient room temperature was recorded at pH 5 and 20-minute contact time, while the contact time of 120 minutes at pH 6 created the most suitable conditions for cadmium biosorption. On the other hand, 2 g dm-3 of C. vulgaris under optimum conditions was sufficient to remove 95.5%, 97.7% and 99.4% of Cd2+, Cu2+ and Pb2+, respectively, from a mixed solution of 50 mg dm-3 of each metal ion. The removal trend was in order of Pb2+ > Cu2+ > Cd2+. The results suggested that the biomass of C. vulgaris is an extremely efficient and environmentally friendly biosorbent for the removal of Cd2+, Cu2+ and Pb2 from aqueous solutions, which may be applied on a large, industrial scale.

Źródło:

Journal of Elementology; 2016, 21, 3
1644-2296

Pojawia się w:

Journal of Elementology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 85.

Tytuł:

Genetic diversity of North African Thymus algeriensis in Tunisia: Population structure and implication for conservation

Autorzy:

Ben El Hadj Ali, I.
Guetat, A.
Boussaid, M.

Powiązania:

https://bibliotekanauki.pl/articles/41188.pdf

Data publikacji:

2012

Wydawca:

Polska Akademia Nauk. Instytut Dendrologii PAN

Tematy:

genetic diversity
North Africa
Thymus algeriensis
Tunisia
population structure
molecular marker
natural population
conservation

Opis:

The genetic diversity within and among nine natural populations of Thymus hirtus Willd. subsp. algeriensis (Boiss. et Reut.) Murb. from different geographical and bioclimatic zones were assessed using Random Amplified Polymorphic DNA data. A total of 154 bands were generated from seven selected primers. 141 bands were polymorphic (P=91.56%). The genetic diversity within a population based on Shannon's index which was high (H'pop=0.307) and varied according to bioclimatic zones. A high genetic differentiation among populations (GST=0.335 and FST=0.296) was revealed, suggesting a population isolation and a low level of gene flow among them. The major proportion of the variation was attributable to individual differences within populations. The genetic structure is in accordance with geography distances. The Neighbour- joining tree based on Nei's and Li's genetic distance among individuals showed that individuals from each population clustered together. The UPGMA dendrogram based on FST values revealed three clusters each of them includes populations closuring to their geographical origin. The high genetic structure of populations resulted from genetic drift caused both by the habitat fragmentation and the low size of most populations. The in situ conservation should interest all populations. The ex situ conservation should be based on the collection of seeds rather within than among populations because of the maximum of variation was revealed within populations.

Źródło:

Dendrobiology; 2012, 67
1641-1307

Pojawia się w:

Dendrobiology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 86.

Tytuł:

Genetic diversity of wild Thymus capitatus (Lamiaceae) in Tunisia using molecular markers

Autorzy:

Ben El Hadj Ali, I.
Guetat, A.
Boussaid, M.

Powiązania:

https://bibliotekanauki.pl/articles/41663.pdf

Data publikacji:

2012

Wydawca:

Polska Akademia Nauk. Instytut Dendrologii PAN

Tematy:

genetic diversity
wild plant
Thymus capitatus
Lamiaceae
Tunisia
molecular marker
habitat fragmentation
conservation strategy
genetic structure

Opis:

In Tunisia, Thymus capitatus L. populations are severely destroyed due to deforestation and over-collecting. The species occurs in small scattered populations decreasing progressively in size. Yet, no conservation or improvement programs are attempted to preserve and promote the potential value of this resource. In this work, we assessed the genetic diversity of nine Tunisian populations of Thymus capitatus L. from different bioclimates, using 103 polymorphic randomly amplified polymorphic DNA (RAPD) loci. The analysis of the genetic variation within and among populations is primordial to elaborate conservation and improvement programs. The species showed a low diversity within populations (0.276

Źródło:

Dendrobiology; 2012, 68
1641-1307

Pojawia się w:

Dendrobiology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 87.

Tytuł:

Studying the effect of some parameters on the stability of shallow tunnels

Autorzy:

Abdellah, W. R.
Ali, M. A.
Yang, H.-S.

Powiązania:

https://bibliotekanauki.pl/articles/92102.pdf

Data publikacji:

2018

Wydawca:

Główny Instytut Górnictwa

Tematy:

tunnel shape
rock joint
numerical modelling
stability indicator
kształt tunelu
przełom skał
modelowanie numeryczne
wskaźnik stabilności

Opis:

Several factors have crucial impact on the serviceability of underground openings including: the quality of rock mass; the presence of rock joints and their geometrical properties; the state of in-situ stress ratio; the depth below surface and opening geometry. This paper only investigates the effect of two parameters on the stability of underground shallow tunnels, namely: the presence of rock joints in the rock mass matrix and the shape of the excavation. A series of two-dimensional elasto-plastic finite-element models has been constructed using rock-soil, RS2D, software. Consequently, parametric stability analysis has been conducted for three different tunnel shapes (e.g. circular, square and horseshoe) with/without joint inclusion. Four reference points have been assigned in the tunnel perimeter (e.g. back, sidewalls and floor) to monitor the state of stress-displacement in the rock mass around them. The results indicate that the weak performance of a tunnel opening occurs with a square-shaped opening and when joints exist in the rock mass. In addition, the normal stress along joints sharply drops in the vicinity of a tunnel opening. Moreover, the direction of shear stress is reversed. Thus, it causes inward shear displacement.

Źródło:

Journal of Sustainable Mining; 2018, 17, 1; 20-33
2300-1364
2300-3960

Pojawia się w:

Journal of Sustainable Mining

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 88.

Tytuł:

Enhancement in cotton (Gossypium hirsutum L.) crop yield by water use efficiency under various planting techniques

Autorzy:

Ali, L.
Anum, W.
Hussain, G.
Shahid, M.I.

Powiązania:

https://bibliotekanauki.pl/articles/9999.pdf

Data publikacji:

2017

Wydawca:

Fundacja na Rzecz Młodych Naukowców

Tematy:

cotton
Gossypium hirsutum
crop yield
water use efficiency
planting technique
water saving

Opis:

Six experiments were conducted for the enhancement in seed cotton yield by increasing water use efficiency and water savings in case of different planting methods of cotton (Gossypium hirsutum L.) crop during the years 2014 & 2015, at three different locations in cotton zone of Punjab (Pakistan) province. The planting methods were, flat planting and no earthing up, flat planting and earthing up after 1st irrigation, flat planting and alternate row earthing after 1st irrigation, flat planting in 112.5/37.5 cm apart paired rows and earthing up after 1st irrigation, ridge planting and bed planting. Cotton crop obtained a maximum benefit from the available water at all three locations in case of flat planting with alternate row earthing up (P3) by predicting a maximum water use efficiency up to 6.79 kg ha-1 mm-1and maximum seed cotton yield of 3432.50 kg ha-1. Maximum water savings of 25.60% was recorded in the same method (P3) during the year 2014, while minimum (-0.17%) was observed in ridge planting (P5) at location number 1 in the same year.

Źródło:

Environment, Earth and Ecology; 2017, 1, 2
2543-9774
2451-4225

Pojawia się w:

Environment, Earth and Ecology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 89.

Tytuł:

An experimental study of forced vibration on natural convection between closed ended concentric and eccentric annular of horizontal cylinder

Autorzy:

Khudhair, Baydaa K.
Saleh, Adel M.
Ekaid, Ali L.

Powiązania:

https://bibliotekanauki.pl/articles/2203644.pdf

Data publikacji:

2023

Wydawca:

Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN

Tematy:

cylindrical annulus
concentric
vertically eccentric
vibration inner cylinder
drgania wymuszone
cylinder
drgania

Opis:

An experimental study has been done into the effects of vertical mechanical vibrating, vertical eccentricity, and the Rayleigh number on natural convection heat transferring out of a horizontally enclosed, ending cylindrical annulus with a radius rate of 2.6 and an aspect ratio of (2:1). The annulus produced between two concentric and vertically eccentric circular cylinders is positioned horizontally, and its internal wall is uniformly heated while isothermally cooling the external wall. The range of present conditions for Rayleigh number is 5×10^4 ≤ Ra≤ 6.48×10^6, and Pr = 0.703, the frequency of vibration is 0 ≤ f ≤ 20Hz; and the amplitude is b mm), with possible exclusion of the highest positive and negative eccentricities. Plots of the average Nusselt number variation against the Rayleigh number showed a significant increase in negative vertical eccentricity. It was found that the average Nusselt decreased as the internal cylinder changed its location vertically from negative to positive through the center, which is normally a desirable effect, but has no advantage over the concentric on the positive side. The Rayleigh number was found to be relatively sensitive to eccentricity. However, an increase of Rayleigh number leads to a nearly proportional increase in the average Nusselt number and a smaller yet still substantial increase in positive eccentricity. This study concluded that the vibration under the current experimental setup significantly affects the concentric position of the internal cylinder, whether the effect is positive or negative. The vibrational average Nusselt number increased in varying proportions, depending on the location of the heated inner cylinder.

Źródło:

Diagnostyka; 2023, 24, 2; art. no. 20230212
1641-6414
2449-5220

Pojawia się w:

Diagnostyka

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 90.

Tytuł:

Effect of an eccentric decoupled charge on rock mass blasting

Autorzy:

Kim, Jung-Gyu
Ali, Mahrous A.M.
Kim, Jong-Gwan

Powiązania:

https://bibliotekanauki.pl/articles/1839045.pdf

Data publikacji:

2020

Wydawca:

Główny Instytut Górnictwa

Tematy:

eccentric decoupled charge
fracture pattern
PFC
AUTODYN
decoupling index
wzór pęknięcia
wskaźnik odsprzęgania

Opis:

Experimental and numerical analyses were conducted to investigate the effect of an eccentric loaded contour hole on a rock mass. In the concrete blocks used for the analyses, detonating cords were placed at the centre of the blast hole and eccentrically against the wall of the blast hole. PFC2D and AUTODYN were used for the numerical analyses, and the results of these software showed that an eccentric decoupled charge can result in the directional development of fractures, thereby enabling the control of cracks in the opposite direction. Even though both types of blasting have identical decoupling indexes, the crack and fracture patterns were affected by the location of the explosive, tamping, and other conditions. The results showed that an eccentric charge holder can be applicable to control the fracture direction and the damaged zone. For an eccentric charge, the initial crack was generated at 0.01 ms and expanded in the intended direction. For the eccentric charge, the maximum pressure at the area in contact with the blast hole wall exceeded that for the central decoupled charge by a factor of 5.5. Furthermore, the pressure in the intended direction was twice of that in the opposite direction.

Źródło:

Journal of Sustainable Mining; 2020, 19, 1; 1-10
2300-1364
2300-3960

Pojawia się w:

Journal of Sustainable Mining

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 91.

Tytuł:

Slow Rusting Resistance in Iranian Barley Cultivars to Puccinia Striiformis sp.Hordei

Autorzy:

Ali Safavi, S.
Ahari, A.B.
Afshari, F.
Arzanlou, M.

Powiązania:

https://bibliotekanauki.pl/articles/65042.pdf

Data publikacji:

2013

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Opis:

Race-specific resistance of barley (Hordeum vulgare L.) to the yellow rust caused by Puccinia striiformis f. sp. hordei, has been reported to be short-lived. Slow rusting resistance has been reported to last for a long time. Twenty Iranian barley cultivars along with resistant and susceptible controls were tested during the 2009-2010 and the 2010-2011 cropping seasons, in field plots at the Ardabil Agricultural Research Station (Iran). The cultivars were tested to identify slow rusting genotypes through epidemiological variables which included: final rust severity (FRS), apparent infection rate (r), relative area under the disease progress curve (rAUDPC), and coefficient of infection (CI). Moreover, differential sets were evaluated in order to determine effective and ineffective resistance genes to barley yellow rust. Results of the mean comparison of resistance parameters showed that cultivars Makouee, Dasht, Fasih, and Arass had low values of FRS, CI, r and rAUDPC compared with susceptible cultivars. The cultivars Walfajre, Abidar and Sahand which had moderate values of the different parameters, were marked as possessing a moderate level of slow rusting. The rest of the cultivars which had high values of different quantitative parameters, were grouped as having a low level of slow rusting or as susceptible. The correlation coefficient between different parameters of slow rusting was significantly high (r = 0.83-0.98). The virulence profile of the prevalent races revealed that rpsEm1, rpsEm2, rpsHF, Rps4, rpsVa1, rpsVa2, rpsAst were effective, and rps2, Rps1.b were ineffective resistance genes during the two year testing period.

Źródło:

Journal of Plant Protection Research; 2013, 53, 1
1427-4345

Pojawia się w:

Journal of Plant Protection Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 92.

Tytuł:

Histological Damage at Gonad of Faunus ater (Gastropod Mollusk) Obtained from Heavy Metal Contaminated River

Autorzy:

Agustina, Rahmi
Sarong, M. Ali
Yulianda, Fredinan
Suhendrayatna, -
Dewi, Ervina

Powiązania:

https://bibliotekanauki.pl/articles/952451.pdf

Data publikacji:

2019

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

Bale River
Reuleng River
heavy metal
Faunus ater
gonads

Opis:

The cause of the histological damage of Faunus ater (gastropod mollusk) gonad has been identified in the samples from two rivers, namely Bale River and Reuleng River which flow through residential, agricultural and industrial areas. The heavy metal concentration within the tissue of Faunus ater was analyzed with Atomic Absorption Spectrophotometer (Shimadzu AA 630). Meanwhile, the histological damage on gonads was observed microscopically. Afterwards, the damage levels obtained from the two respective rivers were compared and analyzed with t-test. The results confirm the histological damage that occurred in the gonads of Faunus ater collected from the two rivers. The gonadal damage of female Faunus ater from both rivers was found not to be significantly different, observed by the number of developed and damaged oocytes. It was also found that the gonads of male Faunus ater collected from Bale Riverl, have higher quantity of spermatogenic cells, in which they experience greater necrosis than the ones from Reuleng River.

Źródło:

Journal of Ecological Engineering; 2019, 20, 8; 114-119
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 93.

Tytuł:

Effect of operating parameters on production of bio-oil from fast pyrolysis of maize stalk in bubbling fluidized bed reactor

Autorzy:

Ali, N.
Saleem, M.
Shahzad, K.
Hussain, S.
Chughtai, A.

Powiązania:

https://bibliotekanauki.pl/articles/779892.pdf

Data publikacji:

2016

Wydawca:

Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie

Tematy:

fast pyrolysis
bio-oil
temperature
particle size
carrier gas flow rate
maize stalk

Opis:

The yield and composition of pyrolysis products depend on the characteristics of feed stock and process operating parameters. Effect of particle size, reaction temperature and carrier gas flow rate on the yield of bio-oil from fast pyrolysis of Pakistani maize stalk was investigated. Pyrolysis experiments were performed at temperature range of 360-540°C, feed particle size of 1-2 mm and carrier gas flow rate of 7.0-13.0 m³/h (0.61.1 m/s superficial velocity). Bio-oil yield increased with the increase of temperature followed by a decreasing trend. The maximum yield of bio-oil obtained was 42 wt% at a temperature of 490°C with the particle size of around 1.0 mm and carrier gas flow rate of 11.0 m³/h (0.9 m/s superficial velocity). High temperatures resulted in the higher ratios of char and non-condensable gas.

Źródło:

Polish Journal of Chemical Technology; 2016, 18, 3; 88-96
1509-8117
1899-4741

Pojawia się w:

Polish Journal of Chemical Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 94.

Tytuł:

A Sierpinski Carpet Five Band Antenna for Wireless Applications

Autorzy:

Khan, Imran
Devanagavi, Geetha D.
Sudhindra, K. R.
Vandana, K. M.
Pai M. M., Manohara
Ali, Tanweer

Powiązania:

https://bibliotekanauki.pl/articles/226982.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

sierpinski carpet
WiMAX
x-band
current distribution

Opis:

A compact Sierpinski Carpet square fractal multiband antenna operating at 3.9 (WiMAX) /6.6 (Satellite TV) /8.1/10.7/11.8 GHz (X-band) is presented. The proposed Microstrip Patch Antenna (MSPA) consists of a Sierpinski Carpet square fractal radiator in which square slots are etched out and a tapered microstrip feed line. The Sierpinski Carpet square fractal patch modifies the current resonant path thereby making the antenna to operate at five useful bands. Impedance matching at these bands are solely achieved by using Sierpinski square slot and tapered feedline, thus eliminating the need of any external matching circuit. The dimensions of the compact antenna is and exhibits S11<-10dB bandwidth of about 4.8% (4.01-3.82 GHz), 2.1% (6.62-6.48 GHz), 2.7% (8.24-8.02 GHz), 2.1% (10.77-10.54 GHz) and 21% (12.1-11.60 GHz) with the gain of 7.57/3.91/3.77/6.74/1.33 dB at the operating frequencies 3.9/6.6/8.1/10.7 and 11.8 GHz, respectively under simulation analysis carried out by using HFSS v.13.0.

Źródło:

International Journal of Electronics and Telecommunications; 2019, 65, 4; 551-556
2300-1933

Pojawia się w:

International Journal of Electronics and Telecommunications

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 95.

Tytuł:

Genetic diversity of Brassica rapa germplasm of Khyber Pakhtunkhwa Pakistan revealed by molecular markers

Autorzy:

Ali, N.
Ali, S.
Khan, N.U.
Jan, S.A.
Rabbani, M.A.
Hussain, I.

Powiązania:

https://bibliotekanauki.pl/articles/12690092.pdf

Data publikacji:

2019

Wydawca:

Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie

Tematy:

Pakistan
plant breeding
Brassica rapa
germplasm
genetic diversity
plant genotype
molecular marker
SSR marker

Opis:

A total of 96 indigenous Brassica rapa accessions were collected from different locations of Khyber Pakhtunkhwa, Pakistan. Simple Sequence Repeats (SSR) markers were used to identify the most diverse genotypes among the collected lots. Twenty six (26) different SSR primers were used for (genetic) variability among collected genotypes. These primers were selected from literature based on their previous results. These primers produced 135 scorable bands of which 75 were polymorphic, with an average of 55.5% polymorphic loci, and reflected the broader genetic background of the collected genotypes. An average 2.88 polymorphic bands with an average PIC value of 0.49 was recorded. Unweighted Pair Group Method with Arithmetic Mean (UPGMA) divided all genotypes into three main groups. Group one contained three clusters, while group two and three had four and two clusters each. Based on the UPGMA dendrogram, genotypes collected from Kohat, Bannu, Swat and Haripur showed considerable amount of variation. From the present study, it is concluded that SSR markers can be proved as the best tool for the genetic variability of other local and exotic B. rapa genotypes.

Źródło:

Acta Scientiarum Polonorum. Hortorum Cultus; 2019, 18, 6; 57-65
1644-0692

Pojawia się w:

Acta Scientiarum Polonorum. Hortorum Cultus

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 96.

Tytuł:

Observed vertical distribution of tropospheric carbon monoxide during 2012 over Iraq

Autorzy:

Abdulfattah, Ibtihaj S.
Rajab, Jasim M.
Al-Salihi, Ali M.
Suliman, Aha
Lim, Hwee S.

Powiązania:

https://bibliotekanauki.pl/articles/118644.pdf

Data publikacji:

2020

Wydawca:

Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie

Tematy:

AIRS
remote sensing
pollution
carbone monoxide
Iraq

Opis:

The atmospheric parameters observations enable to made continental and global scales by remote sensing devices existent in space. One of these instruments is the Atmospheric InfraRed Sounder (AIRS) onboard Aqua satellite. We characterize the vertical distribution of troposphere carbon monoxide (CO) measured by AIRS over IRAQ. This study presents one year data. Results shown standard deviation of monthly troposphere CO for five locations: Baghdad, Basrah, Maysan, Al Fakka, and Mosul, from January to December 2012, was 107.15 ±18.75 ppbv for entire period depend on whether circumstance and topography. The seasonal differences undulate between winter and summer seasons, with higher values CO in the winter than in the summer and autumn seasons. In addition, the rising in troposphere CO values can be measured during year over the manufacturing and crowded urbanized zones. AIRS observations reveal enhanced abundances of CO, with values that can exceed 120 ppbv at approximately 4 km altitude over Baghdad and Mosul. The lower CO amounts observed of approximately 88–90 ppbv at 253 mb (altitude 11 km) during October. Comparisons over Baghdad station in 2012 showed close agreement between the ground CO data and the observed CO from AIRS, and regression result showed high correlation coefficient (R = 0.962). The vertical CO observation by AIRS is providing meaningful information for different altitude layers closer to the troposphere, and the satellite measurements are able to measure the increase of the atmosphere CO concentrations over varied regions.

Źródło:

Scientific Review Engineering and Environmental Sciences; 2020, 29, 2; 184-195
1732-9353

Pojawia się w:

Scientific Review Engineering and Environmental Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 97.

Tytuł:

Numerical analysis of the compositional graded quaternary barrier AlGaN-based ultraviolet-C light-emitting diode

Autorzy:

Malik, S.
Usman, Muhammad
Hussain, M.
Munsif, M.
Khan, S.
Rasheed, S.
Ali, S.

Powiązania:

https://bibliotekanauki.pl/articles/1818193.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich

Tematy:

ultraviolet
light-emitting diodes
efficiency
quantum wells

Opis:

The compositional graded quaternary barriers (GQBs) instead of ternary/conventional quantum barriers (QBs) have been used to numerically enhance the efficiency of AlGaN-based ultraviolet light-emitting diode (LED). The performance of LED with GQBs is examined through carrier concentrations, energy band diagrams, radiative recombination, electron and hole flux, internal quantum efficiency (IQE), and emission spectrum. As a function of the operating current density, a considerable reduction in efficiency droop is observed in the device with composition-graded quaternary barriers as compared to the conventional structure. The efficiency droop in case of a conventional LED is ~77% which decreased to ~33% in case of the proposed structure. Moreover, the concentration of electrons and holes across the active region in case of the proposed structure is increased to ~156% and ~44%, respectively.

Źródło:

Opto-Electronics Review; 2021, 29, 3; 80--84
1230-3402

Pojawia się w:

Opto-Electronics Review

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 98.

Tytuł:

Gastro-oesophageal cancer related malnutrition: a challenge case to manage

Autorzy:

Elzohry, Alaa Ali M.
Mohammed, Khalid Fawzy
Aly, Asmaa Mohamed

Powiązania:

https://bibliotekanauki.pl/articles/1062963.pdf

Data publikacji:

2019

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Gastro
ICU
SOFA score
esophageal cancer Hypoalbuminemia
major cancer surgery

Opis:

Gastro-esophageal cancer is a very common malignant tumours arising from the digestive tract. Hypoalbuminemia and weight loss often result from malnourishment. Malnourished patients have a higher incidence of mortality and morbidity causing prolonged hospital stay. To discuss the incidence and effects of Gastro-esophageal cancer related malnutrition and demonstrate different methods to solve this problem. The current review revealed that malnutrition increases the risk of complications and duration of stay in hospital and ICU in GIT cancer patients, as such, accounts for burden on ICU budget.

Źródło:

World Scientific News; 2019, 124, 2; 183-192
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 99.

Tytuł:

Health risk assessment of heavy metals in irrigation water, soil and vegetables from different farms in Riyadh district, Saudi Arabia

Autorzy:

Alturiqi, A.S.
Albedair, L.A.
Ali, M.H.H.

Powiązania:

https://bibliotekanauki.pl/articles/1192504.pdf

Data publikacji:

2020

Wydawca:

Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza

Tematy:

heavy metal
vegetables
dietary intake
health risk
HQ
THQ
ILCR

Opis:

The safety and security of different foodstuffs are considered important and have a high priority in global sustainable development. The contents of Fe, Mn, Cu, Zn, Ni, Pb and Cd were estimated in edible parts of 60 vegetable samples, irrigation water and agricultural soil collected from 5 farms in suburban areas around Riyadh district, Saudi Arabia. Also, soil pollution indices, pollution load index and contamination factor (PLI, CF), bioaccumulation factor (BAF), non-carcinogenic and carcinogenic risk indices (HQ, THQ, and ILCR) were estimated. The content of heavy metals in irrigation water and soil was within the recommended permissible levels, except for Cd in soil, which exceeds permissible levels. The trend of metal concentrations in both agricultural soil and vegetables was found in the order: Fe > Mn > Zn > Cu > Ni > Pb > Cd. Cluster analysis of the metal content in vegetables showed a tendency towards the accumulation of heavy metals in the order of leaves > roots > fruits > flowers > tuber. The BAFs values found were < 1.0, HQs values for Fe, Mn, Cu, Zn and Ni were found to be < 1, while the estimated HQs for Pb and Cd were > 1, posing greater risk to the health of adults and children. THQ values were higher for children compared to adults. ILCR values for Cd showed a serious issue, as it exceeds the threshold risk limit (>10−4) in all parts of the investigated vegetables in all sampling sites.

Źródło:

Journal of Elementology; 2020, 25, 4; 1269-1289
1644-2296

Pojawia się w:

Journal of Elementology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 100.

Tytuł:

Even Vertex Tetrahedral Mean Graphs

Autorzy:

Banu, A. Fathima
Chelliah, S.
Syed Ali Nisaya, M. P.

Powiązania:

https://bibliotekanauki.pl/articles/1193397.pdf

Data publikacji:

2021

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Tetrahedral number
even vertex tetrahedral mean graph
even vertex tetrahedral mean labeling

Opis:

The nth tetrahedral number is denoted by T_n and is of the form T_n = 1/6 n (n+1) (n+2). A graph G with p vertices and q edges is said to have an even vertex tetrahedral mean labeling if there exists an injective function f: V(G) →{0┤, 2, 4, . . . , 2T_q-2 , ├ 2T_q } such that the induced edge function f^*: E(G) →{T_1,T_(2 , . . .) ,T_q } defined by f^*(uv) = (f(u)+ f(v))/2 ∀ e=uv∈E(G) is a bijection. A graph which admits even vertex tetrahedral mean labeling is called an even vertex tetrahedral mean graph. In this paper, we introduce even vertex tetrahedral mean labeling and we prove that path, star, bistar, coconut tree, caterpillar, shrub, P_(m )@ P_n, banana tree, Y- tree and F-tree are even vertex tetrahedral mean graphs.

Źródło:

World Scientific News; 2021, 156; 26-39
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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