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Wyszukujesz frazę "Ibrahim, R." wg kryterium: Autor


Tytuł:
Studying structural and optical properties of ZnO-CdO nanocomposites
Autorzy:
Abdul-Ameer, Zehraa N.
Agool, Ibrahim R.
Powiązania:
https://bibliotekanauki.pl/articles/1193878.pdf
Data publikacji:
2015
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
CdO
ZnO
ZnO-CdO
nanocomposite
nanocomposites
sol gel
Opis:
Zinc oxide, cadimium oxide and their composites were synthesized in this research using sol-gel method and characterized by X-ray diffraction, to investigate their optical properties using UV-visible, photoluminenscence (PL) spectroscopy, which showed red shift behavior in the ZnO manner enhanced by addition of CdO which noticed through calculations of energy gap.
Źródło:
World Scientific News; 2015, 23; 35-45
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparative study of 2DOF PID and 2DOF fractional order PID controllers on a class of unstable systems
Autorzy:
Bingi, K.
Ibrahim, R.
Karsiti, M. N.
Hassan, S. M.
Harindran, V. R.
Powiązania:
https://bibliotekanauki.pl/articles/229519.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fractional order controller
set-point weighting
2DOF PID
process control
unstable systems
Opis:
The proportional-integral-derivative (PID) controllers have experienced series of structural modifications and improvements. Example of such modifications are set-point weighting and fractional ordering. While the former is to achieve two-degree-of-freedom (2DOF) ability of set-point tracking and disturbance rejection, the latter is to ensure smooth control action. Therefore, this paper reviews various forms of PID controllers and provides a comparative analysis of 2DOF PID and 2DOF fractional order PID (FOPID) controllers. The paper also discusses the conversion of one PID form to another. For the comparative analysis of the various controllers, a class of unstable systems are considered. Simulation result shows that in most cases the conversion from one form to another does not significantly affect the performance of the system. It is also observed that the 2DOF controllers (2DOF PID and 2DOF FOPID) improved significantly the performance of the ordinary PID controllers.
Źródło:
Archives of Control Sciences; 2018, 28, 4; 635-682
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determinants of female employee wellbeing from the perspective of work-family conflict
Determinanty dobrostanu pracowników kobiet z perspektywy konfliktu praca rodzina
Autorzy:
Ibrahim, R Zirwatul Aida R
Saputra, Jumadil
Ali, Siti Nazilah Mat
Bratu, lulian Alexandru
Dagang, Mazidah Mohd
Johar, Siti Sarawati
Powiązania:
https://bibliotekanauki.pl/articles/27315186.pdf
Data publikacji:
2022
Wydawca:
Politechnika Częstochowska
Tematy:
work to family conflict
family to work conflict
female employee and wellbeing
konflikt między pracą a rodziną
konflikt między rodziną a pracą
pracownica i dobrostan
Opis:
Employee wellbeing is the most valuable asset to organisations, and it will affect both employees and organisations that employ them. Work-family conflict has been exacerbated by substantial changes in family composition, including the developing dual-earner, single-parent households and the increasing number of working moms. Due to the excessive burden of priorities on the family, females have more difficulty balancing between work and family than males. Of these, the current investigation seeks to evaluate the reliability and validity of the Malay Version of Work-Family Conflict and Emotional Exhaustion Scales and investigate the determinant of female employee wellbeing (emotional exhaustion) from the perspective of work-family conflict. A convenience sample of 200 female employees aged between 25 and 50 was surveyed online among public sector employees in Kuala Terengganu District, East Coast of Malaysia Peninsular. Results of exploratory factor analysis using Principal Component Analysis (PCA) yielded three underlying structures of the instruments, and confirmatory factor analysis (CFA) showed a good fit to the data. Further, the study's findings showed that both works to family conflict (WFC) and family to work conflict (FWC) predicted emotional exhaustion in participants. This study makes significant contributions in providing good evidence on psychometric properties of measurement and contributes to the corpus of literature and theory related to the field.
Dobrostan pracowników jest najcenniejszym zasobem organizacji i będzie miał wpływ zarówno na pracowników, jak i organizacje, które ich zatrudniają. Konflikt między pracą a rodziną został zaostrzony przez istotne zmiany w składzie rodziny, w tym rozwijające się gospodarstwa domowe z dwoma osobami zarabiającymi, samotnymi rodzicami oraz rosnącą liczbę pracujących matek. Ze względu na nadmierne obciążenie rodziny priorytetami, kobiety mają większe trudności z balansowaniem między pracą a rodziną niż mężczyźni. Spośród nich, obecne badanie ma na celu ocenę rzetelności i trafności malajskiej wersji skali konfliktu praca-rodzina i skali wyczerpania emocjonalnego oraz zbadanie czynnika warunkującego dobrostan kobiet (wyczerpanie emocjonalne) z perspektywy konfliktu praca-rodzina. Wśród pracowników sektora publicznego w dystrykcie Kuala Terengganu na wschodnim wybrzeżu półwyspu Malezji przeprowadzono ankietę internetową obejmującą 200 pracowników płci żeńskiej w wieku od 25 do 50 lat. Wyniki eksploracyjnej analizy czynnikowej przy użyciu analizy głównych składowych (PCA) dostarczyły trzech podstawowych struktur instrumentów, a konfirmacyjna analiza czynnikowa (CFA) wykazała dobre dopasowanie do danych. Co więcej, wyniki badania wykazały, że zarówno praca z konfliktem rodzinnym (WFC), jak i konflikt rodzinny z pracą (FWC) przewidywały emocjonalne wyczerpanie uczestników. Badanie to wnosi znaczący wkład w dostarczanie dobrych dowodów na psychometryczne właściwości pomiaru, a także wnosi wkład do korpusu literatury i teorii związanych z tą dziedziną.
Źródło:
Polish Journal of Management Studies; 2022, 25, 2; 174--190
2081-7452
Pojawia się w:
Polish Journal of Management Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Degradation and physical properties of sugar palm starch/ sugar palm nanofibrillated cellulose bionanocomposite
Degradacja i właściwości fizyczne bionanokompozytów skrobi palmy cukrowej wzmocnionej nanowłóknami celulozowymi tej palmy
Autorzy:
Atikah, M. S. N.
Ilyas, R. A.
Sapuan, S. M.
Ishak, M. R.
Zainudin, E. S.
Ibrahim, R.
Atiqah, A.
Ansari, M. N. M.
Jumaidin, R.
Powiązania:
https://bibliotekanauki.pl/articles/947563.pdf
Data publikacji:
2019
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
Tematy:
sugar palm
high pressurized homogenizer
nanofibrillated cellulose
nanocomposites
soil burial degradation
palma cukrowa
homogenizacja wysokociśnieniowa
nanowłóknista celuloza
nanokompozyty
degradacja w glebie
Opis:
This paper aims to study the degradation rate of sugar palm nanofibrillated cellulose (SPNFCs) and sugar palm starch (SPS). SPNFCs were isolated from sugar palm fiber, while SPS is extracted from sugar palm trunk. The SPNFCs were reinforced with SPS biopolymer as biodegradable reinforcement materials of different diameter/length based on the number of passes of high pressurize homogenization process (5, 10 and 15 passes represented by SPS/SPNFCs-5, SPS/SPNFCs-10, and SPS/SPNFCs-15). These SPNFCs were incorporated into SPS plasticized with glycerol and sorbitol via solution casting method. Soil burial experiment performed on SPS and SPS/SPNFCs bionanocomposites showed that SPS was degraded more rapidly by losing 85.76% of its mass in 9 days compared to 69.89% by SPS/SPNFCs-15 bionanocomposite. The high compatibility between SPNFCs nanofiber and SPS biopolymer matrices can be observed through field emission scanning electron microscopy (FE-SEM).
Zbadano szybkość degradacji nanowłóknistej celulozy wyizolowanej z palmy cukrowej (Arenga pinnata) (SPNFCs) oraz skrobi wydzielonej przez ekstrakcję z rdzenia pnia tej palmy (SPS). SPNFCs uzyskiwano z włókien palmy cukrowej, poddawanych homogenizacji pod wysokim ciśnieniem w 5, 10 lub 15 cyklach, otrzymując nanowłókna celulozy o różnej długości i średnicy. SPNFCs wprowadzano do SPS uplastycznionego mieszaniną (1 : 1) glicerolu isorbitolu. Metodą odlewania z roztworu wytwarzano błony nanokompozytowe SPS/SPNFCs-5, SPS/SPNFCs-10 i SPS/SPNFCs-15. Test glebowy procesu biodegradacji wykazał, że SPS ulegało szybszej degradacji, tracąc 85,76% swojej masy w ciągu 9 dni, w porównaniu z ubytkiem masy 69,89% w wypadku bionanokompozytu SPS/SPNFCs-15. Na podstawie analizy metodą skaningowej mikroskopii elektronowej z emisją polową (FE-SEM) stwierdzono dużą kompatybilność między nanowłóknami SPNFCs i biopolimerową osnową SPS.
Źródło:
Polimery; 2019, 64, 10; 680-689
0032-2725
Pojawia się w:
Polimery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Implementation of Printed Small Size Dual Frequency Antenna in MHz Range
Autorzy:
Eldamak, Angie R.
Ibrahim, Khalid M.
Elkattan, Mohamed
Powiązania:
https://bibliotekanauki.pl/articles/225998.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
dual frequency
meander line
MHz range
monopole antenna
Opis:
This paper presents a printed dual band monopole antenna working below 250 MHz using meander line and an added stub. Meander line approach is used to reduce the size of the low frequency monopole. The proposed antenna is fed by microstrip line and printed on FR-4 substrate with an overall size of 290 x 83 mm2. The added stub tuned dual band operation at 114 MHz and 221 MHz with measured reflection coefficient of -19 dB at both bands. The antenna has omni-directional characteristics with efficiency greater than 90% and gain of 1.87, 1.7 dBi at both bands respectively. The antenna design is optimized through a detailed parametric study. This study includes varying stub, Meander, feed and ground dimensions. The antenna has been fabricated and measured where dual band operation in the MHz range is verified.
Źródło:
International Journal of Electronics and Telecommunications; 2019, 65, 4; 565-570
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Industrial noise level study in a wheat processing factory in Ilorin, Nigeria
Autorzy:
Ibrahim, I.
Ajao, K. R.
Aremu, S. A.
Powiązania:
https://bibliotekanauki.pl/articles/265416.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
poziom szumów
cyfrowy miernik szumów
hałas
wheat processing
noise level
digital sound meter
questionnaire
hearing protector
Opis:
An industrial process such as wheat processing generates significant noise which can cause adverse effects on workers and the general public. This study assessed the noise level at a wheat processing mill in Ilorin, Nigeria. A portable digital sound level meter HD600 manufactured by Extech Inc., USA was used to determine the noise level around various machines, sections and offices in the factory at pre-determined distances. Subjective assessment was also mode using a World Health Organization (WHO) standard questionnaire to obtain information regarding noise ratings, effect of noise on personnel and noise preventive measures. The result of the study shows that the highest noise of 99.4 dBA was recorded at a pressure blower when compared to other machines. WHO Class-4 hearing protector is recommended for workers on the shop floor and room acoustics should be upgraded to absorb some sounds transmitted to offices.
Źródło:
International Journal of Applied Mechanics and Engineering; 2016, 21, 2; 511-523
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Responses of grofth of ladys fingers (Abelmoschus esculentus L.) to different treatments methods of dairy wastewater
Autorzy:
Al-Dulaimi, R.I.
Ismail, N.
Ibrahim, M.H.
Powiązania:
https://bibliotekanauki.pl/articles/51987.pdf
Data publikacji:
2014
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2014, 21, 1
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A performance analysis of a hybrid golden section search methodology and a nature-inspired algorithm for MPPT in a solar PV system
Autorzy:
Mostafa, Hazem H.
Ibrahim, Amr M.
Anis, Wagdi R.
Powiązania:
https://bibliotekanauki.pl/articles/141645.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
hybrid optimization
golden sections search
multi-verse optimization algorithm
maximum power point tracking
perturb and observe
photovoltaic (PV)
Opis:
This research presents a comparative study for maximum power point tracking (MPPT) methodologies for a photovoltaic (PV) system. A novel hybrid algorithm golden section search assisted perturb and observe (GSS-PO) is proposed to solve the problems of the conventional PO (CPO). The aim of this new methodology is to boost the efficiency of the CPO. The new algorithm has a very low convergence time and a very high efficiency. GSS-PO is compared with the intelligent nature-inspired multi-verse optimization (MVO) algorithm by a simulation validation. The simulation study reveals that the novel GSS- PO outperforms MVO under uniform irradiance conditions and under a sudden change in irradiance.
Źródło:
Archives of Electrical Engineering; 2019, 68, 3; 611-627
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Flow characteristics after installation of floating bridge in open channel
Autorzy:
Ibrahim, Mohamed M.
Eltoukhy, Mahmoud A.R.
Ghanim, Adnan D.
Powiązania:
https://bibliotekanauki.pl/articles/1844336.pdf
Data publikacji:
2021
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
floating bridges
flow characteristics
flume
head loss
velocity
Opis:
A pontoon bridge, also known as a floating bridge, can be used as for pedestrian and vehicle traffic. The buoyancy of the floating bridge limits the maximum load it can carry. This research included experimental runs to study variations of open channel flow characteristics upstream and downstream a floating bridge. Eighty one runs have been carried out using a flume in a hydraulic laboratory. The experimental run program is classified into two main categories; the first investigates the velocity ratios (vds/vus) downstream and upstream the floating bridge. The second category is concerned with the energy head losses (hL) due to the presence of a floating bridge. The experimental runs are carried out using three pontoon lengths, three flow depths, six submerged depths, and three discharges. The results are analysed and graphically presented to help predict hydraulic parameters. The outcomes have shown that the floating bridge upstream, Froude number and submergence of the pontoon are the dominant parameters that affect the studied flow characteristics.
Źródło:
Journal of Water and Land Development; 2021, 49; 244-251
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mitigation of salinity stress effects on growth, physio-chemical parameters and yield of snapbean (Phaseolus vulgaris L.) by exogenous application of glycine betaine
Autorzy:
Desoky, E-S.M.
Ibrahim, S.A.
Merwad, A-R.M.
Powiązania:
https://bibliotekanauki.pl/articles/11220.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
Artykuł
Tytuł:
Heat shock increases oxidative stress to modulate growth and physico-chemical attributes in diverse maize cultivars
Autorzy:
Hussain, I.
Ashraf, M.A.
Rasheed, R.
Iqbal, M.
Ibrahim, M.
Ashraf, S.
Powiązania:
https://bibliotekanauki.pl/articles/25486.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Opis:
The present investigation was conducted to appraise the physiochemical adjustments in contrasting maize cultivars, namely, PakAfgoi (tolerant) and EV-5098 (sensitive) subjected to heat shock. Seven-day-old seedlings were exposed to heat shock for different time intervals (1, 3, 6, 24, 48 and 72 h) and data for various physiochemical attributes determined to appraise time course changes in maize. After 72 h of heat shock, the plants were grown under normal conditions for 5 d and data for different growth attributes and photosynthetic pigments recorded. Exposure to heat shock reduced growth and photosynthetic pigments in maize cultivars. The plants exposed to heat shock for up to 3 h recovered growth and photosynthetic pigments when stress was relieved. A time course rise in the relative membrane permeability, hydrogen peroxide (H2O2) and malondialdehyde contents was recorded particularly in the EV-5098 indicating that heat shock-induced oxidative stress. Activities of different enzymatic antioxidants greatly altered due to heat shock. For instance, an increase in superoxide dismutase activity was recorded in both maize cultivars. The activity of ascorbate peroxidase was greater in Pak-Afgoi. However, the peroxidase and catalase activities were higher in plants of EV-5098. Heat shock caused a significant rise in the proline and decline in the total free amino acids. Overall, the performance of Pak-Afgoi was better in terms of having lesser oxidative damage and greater cellular levels of proline. The results suggested that oxidative stress indicators (relative membrane permeability, H2O2 and malondialdehyde) and proline can be used as markers for heat shock tolerant plants.
Źródło:
International Agrophysics; 2016, 30, 4
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Role of nutrition in the management and control of malaria infection: a review
Autorzy:
Onukogu, S. C.
Ibrahim, J.
Ogwuche, R. A.
Jaiyeola, T. O.
Adiaha, M. S.
Powiązania:
https://bibliotekanauki.pl/articles/1165192.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Effective nutrition
Immune system
Malaria infection
Malnutrition
Poverty
Sub-Sahara African
Opis:
A review of the contribution of nutrition in management and control of Malaria was conducted. Nutrition has been confirmed as one factors that can be used to suppress the effect of malaria infection before clinical treatment is received by the patient. For the body to function normally, its nutritional demand must be met in the right proportions. Diet rich in vitamins, minerals, micronutrients are required for the metabolic functioning of the body, hence effective or adequate nutrition has health benefits to the human body. Living on quality diet has a way of improving the body defense mechanism against infectious diseases such as malaria.
Źródło:
World Scientific News; 2018, 107; 58-71
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Technology acceptance in learning history subject using augmented reality towards smart mobile learning environment : case in Malaysia
Autorzy:
Suhaimi, H.
Aziz, N. N.
Mior Ibrahim, E. N.
Wan Mohd Isa, W. A. R.
Powiązania:
https://bibliotekanauki.pl/articles/27314247.pdf
Data publikacji:
2022
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
smart city education
mobile learning
augmented reality
history
technology acceptance model
Opis:
In alignment with smart city initiatives, Malaysia is shifting its educational landscape to a smart learning environment. The Ministry of Education (MoE) has made History a mandatory subject for passing the Malaysian Certificate of Education to grow awareness and instil patriotism among Malaysian students. However, History has been known as one of the difficult subjects to study for many students. On the other hand, the Malaysian Government Education Blueprint 2013-2025 seeks to “leverage ICT scale up quality learning” across the country. Therefore, this study aims to identify the factors that influence the intention to use Augmented Reality (AR) for mobile learning in learning History subject among secondary school students in Malaysia. Quantitative approach has been chosen as the research method for this study. A direct survey was conducted on 400 secondary school students in one of the smart cities in Malaysia as the target respondents. The collected data are analysed through descriptive statistics and Multiple Linear Regression analysis by using Statistical Package for the Social Sciences. Based on the results, the identified factors that influence the intention to use AR for mobile learning in learning History subject are Gender, Perceived Usefulness, Perceived Enjoyment, and Attitude Towards Use. The identified factors can be a good reference for schools and teachers to strategize their teaching and learning methods in pertaining to History subject among secondary school students in Malaysia. Future studies may include the study of various types of schools in Malaysia and explore more moderating effects of demographic factors.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2022, 16, 2; 20--29
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structured Analysis of Nanostructured Zinc Oxide (ZnO) Thin Films Deposited by Sol-Gel
Autorzy:
Hussin, Rosniza
Hanafi, F.
Rashid, R. A.
Harun, Z.
Kamdi, Z.
Ibrahim, S. A.
Ainuddin, A. R.
Rahman, W.
Leman, A. M.
Powiązania:
https://bibliotekanauki.pl/articles/2134100.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
sol-gel
zinc oxide
ZnO
thin films
nanostructured
Opis:
In this work, zinc oxide (ZnO) thin films are deposited on glass substrate using the sol-gel spin coating technique. The effect of annealing temperature on structural properties was investigated. The ZnO sol-gel was produced from zinc acetate dehydrate as the starting material with iso-propanol alcohol as the stabilizer. The ratio was controlled, distilled water and diethanolamine as the solvent mixing on a magnetic stirrer for an hour under constant heat of 60°C. The ZnO thin film was deposited using the spin coating technique with the speed of 3000 rpm for 30 minutes before the sample undergoes pre-heat in the oven at the temperature of 100°C for 10 minutes. The sample was annealing in the furnace for an hour at 200°C, 350°C, and 500°C. The X-ray diffraction (XRD) analysis confirms that hexagonal wurtzite structure with zincite and zinc acetate hydroxide hydrate composition. The thin films surface roughness was analyzed using an atomic force microscope (AFM) and scanning electron microscope (SEM) for surface morphology observation.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 3; 1055--1060
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measuring wind gradients in agroforestry systems by shaded piche evaporimeters. II. Accuracies obtained in some African case studies
Autorzy:
Stigter, C J
Kainkwa, R.M.R.
Oteng'i, S.B.B.
Onyewotu, L.O.Z.
Mohammed, A.E.
Ibrahim, A.A.
Rashidi, M.G.M.
Powiązania:
https://bibliotekanauki.pl/articles/26193.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
anemometry
Piche evaporimeter
wind reduction
agroforest system
Źródło:
International Agrophysics; 2000, 14, 4
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł

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