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

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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

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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

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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

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