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Spin and Orbital Magnetisms of NiFe Compound:Density Functional Theory Study and Monte Carlo Simulation

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Chinese Physics Letters 2018年第3期35卷 58-61页

作者： R.Masrour A.jabar E.K.Hlil M.Hamedoun A.Benyoussef A.Hourmatallah K.Bouslykhane A.Rezzouk N.Benzakour Laboratory of Materials ProcessesEnvironment and QualityCady Ayyed UniversityNational School of Applied SciencesSail 63 46000Morocco Institut Neel CNRS et Universite Grenoble AlpesBP 166F-38042 Grenoble Cedex 9France Institute of Nanomaterials and Nanotechnologies MAScIRRabatMorocco Hassan II Academy of Science and Technology RabatMorocco Equipe de Physique du Solide Laboratoire LIPIEcole Normale SuperieureBP 5206BensoudaFesMorocco Laboratoire de Physique du Solide Universite Sidi Mohammed Ben AbdellahFaculte des Sciences Dhar MahrazBP 1796FesMorocco

The self-consistent ab initio calculations based on the density functional theory approach using the full potential linear augmented plane wave method are performed to investigate both the electronic and magnetic properties of the NiFe compound. Polarized spin within the framework of the ferromagnetic state between magnetic ions is considered. Also, magnetic moments considered to lie along （001） axes are computed. The Monte Carlo simulation is used to study the magnetic properties of NiFe. The transition temperature To, hysteresis loop, coercive field and remanent magnetization of the NiFe compound are obtained using the Monte Carlo simulation.

关键词： Fe Spin and Orbital Magnetisms of Ni Fe Compound Ni

Realizing high thermoelectric performance via selective resonant doping in oxyselenide BiCuSeO

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Nano Research 2023年第1期16卷 1679-1687页

作者： Yue-Xing Chen Wenning Qin Adil Mansoor Adeel Abbas Fu Li Guang-xing Liang Ping Fan Muhammad Usman Muzaffar Bushra jabar Zhen-hua Ge Zhuang-hao Zheng F1 Shenzhen Key Laboratory of Advanced Thin Films and Applications Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China Faculty of Materials and Manufacturing Beijing University of TechnologyBeijing 100124China International Center for Quantum Design of Functional Materials(ICQD) Hefei National Laboratory for Physical Sciences at Microscale(HFNL)and CAS Center for Excellence in Quantum Information and Quantum PhysicsUniversity of Science and Technology of ChinaHefei 230026China Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093China

Tuning the charge carrier concentration is imperative to optimize the thermoelectric(TE)performance of a *** BiCuSeO based oxyselenides,doping efforts have been limited to optimizing the carrier *** the present work,dual-doping of In and Pb at Bi site is introduced for p-type BiCuSeO to realize the electric transport channels with intricate band characteristics to improve the power factor(PF).Herein,the impurity resonant state is realized via doping of resonant dopant In over Pb,where Pb comes forward to optimize the Fermi energy in the dual-doped BiCuSeO system to divulge the significance of complex electronic *** manifold roles of dual-doping are used to adjust the elevation of the PF due to the significant enhancement in electrical ***,the combined experimental and theoretical study shows that the In/Pb dual doping at Bi sites gently reduces bandgap,introduces resonant doping states with shifting down the Fermi level into valence band(VB)with a larger density of state,and thus causes to increase the carrier concentration and effective mass(m*),which are favorable to enhance the electronic transport *** a result,both improved ZTmax=0.87(at 873 K)and high ZTave=0.5(at 300–873 K)are realized for InyBi(1−x)−yPbxCuSeO(where x=0.06 and y=0.04)*** obtained results successfully demonstrate the effectiveness of the selective dual doping with resonant dopant inducing band manipulation and carrier engineering that can unlock new prospects to develop high TE materials.

关键词： thermoelectric material BiCuSeO dual-doping power factor figure of merit

The Effect of NaHCO<sub>3</sub>as Catalyst via Electrolysis

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Natural Resources 2013年第1期4卷 65-68页

作者： Siti Norbakyah jabar Mohd Zamri Ibrahim Department of Science Engineering Faculty of Sciences and Technology University of Malaysia Terengganu Terengganu Malaysia

Renewable energy is a kind of energy that comes from natural sources like water, sunlight, wind and so on. Water electrolysis is currently the most dominant technology used for hydrogen production from renewable sources because of high energy conversion efficiency. In this present work, the effect of NaHCO3 via electrolysis?was studied. Stainless steel is chosen to be as the electrode and different concentration of NaHCO3 are used as alkaline solutions in electrolysis system. The rates of hydrogen gas produced using different concentration of NaHCO3 and pH value of every sample were measured. The experimental results that the performance of water electrolysis was highly affected by NaHCO3, the rate of hydrogen gas showed that 0.4 M of NaHCO3 and 65 ml/min at pH 8.2 are the best amount.

关键词： Hydrogen Water Electrolysis Stainless Steels NaHCO3

In-situ growth of high-performance(Ag,Sn)co-doped CoSb_(3)thermoelectric thin films

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Journal of Materials Science & Technology 2021年第33期92卷 178-185页

作者： Zhuang-Hao Zheng Jun-Yu Niu Dong-Wei Ao Bushra jabar Xiao-Lei Shi Xin-Ru Li Fu Li Guang-Xing Liang Yue-Xing Chen Zhi-Gang Chen Ping Fan Shenzhen Key Laboratory of Advanced Thin Films and Applications Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China Centre for Future Materials University of Southern QueenslandSpringfield CentralBrisbaneQueensland 4300Australia School of Mechanical and Mining Engineering The University of QueenslandSt LuciaBrisbaneQueensland 4072Australia

Owing to the unique features,such as mechanically robust,low-toxic,high stability,and high thermoelectric performance,CoSb_(3)-based skutterudite materials are among art-of-the state thermoelectric *** this work,we develop a facile in-situ method for the growth of well-crystallinity(Ag,Sn)co-doped CoSb_(3)thin *** preparation method can efficiently control the dopant concentration and distribution in the thin *** the density functional theory calculation and the experimental results suggest that Sn and Ag dopants trend to enter the lattice and preferentially fill interstitial ***,band structure calculation results suggest that the Fermi level moves into the conduction bands due to co-doping and eventually induces the increased electrical conductivity,which agrees with the optimization of carrier ***,an increase in the density of state after co-doping is responsible for the increased Seebeck *** a result,the power factors of(Ag,Sn)co-doped CoSb_(3)thin films are greatly enhanced,and the maximum power factor achieves over 0.3 m W m^(-1)K^(-2)at 623 K,which is almost two times than that of the un-doped CoSb_(3)*** microstructures,including Sb vacancies and Ag/Sn interstitial atoms as point defects,and a high density of lattice distortions coupled with nano-sized Ag-rich grains,lead to all scale phonon *** a result,a reduced thermal conductivity of~0.28 W m^(-1)K^(-1)and a maximum ZT of~0.52 at 623 K are obtained from(Ag,Sn)co-doped CoSb_(3)thin *** study indicates our facile in-situ growth can be used to develop high-performance dual doped CoSb_(3)thins.

关键词： CoSb_(3)thin films Thermoelectric Magnetron sputtering Co-doping

BVRI photometric observations,light curve solutions and orbital period analysis of BF Pav

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Research in Astronomy and Astrophysics 2021年第8期21卷 193-202页

作者： Atila Poro Fahri Alicavus Eduardo Fernández-Lajús Fatemeh Davoudi PegahSadat MirshafieKhozani Mark G.Blackford Edwin Budding Behjat Zarei Jalalabadi jabar Rahimi Farzaneh Ahangarani Farahani The International Occultation Timing Association Middle East section Iran Astronomy Department of the Raderon Lab BurnabyBCCanada Canakkale Onsekiz Mart University Faculty of Arts and SciencesDepartment of Physics17020CanakkaleTurkey Canakkale Onsekiz Mart University Astrophysics Research Center and Ulupnar Observatory17020CanakkaleTurkey Instituto de Astrofisica de La Plata(CCT La Plata-CONICET-UNLP) La PlataArgentina Facultad de Ciencias Astronomicas y Geofisicas Universidad Nacional de La PlataPaseo del BosqueB1900FWALa PlataArgentina Variable Stars South(VSS) Congarinni ObservatoryCongarinniNSW2447Australia Carter Observatory 40 Salamanca RdKelburnWellington 6012New Zealand

A new ephemeris,period change analysis and light curve modeling of the W UMa-type eclipsing binary BF Pav are presented in this *** curves of the system taken in BVRI filters from two observatories,in Australia and Argentina,were modeled using the Wilson-Devinney *** results of this analysis demonstrate that BF Pav is a contact binary system with a photometric mass ratio q=1.460 ± 0.014,a fillout factor f=12.5%,an inclination of 87.97 ± 0.45 deg and a cold spot on the secondary *** applying the distance modulus formula,the distance of BF Pav was calculated to be d=268 ± 18 pc which is in good agreement with the Gaia EDR3 *** obtain an orbital period increase at a rate of 0.142 s century-1 due to a quadratic trend in the O-C ***,an alternative sudden period jump probably occurred which could be interpreted as a rapid mass transfer from the lower mass star to its companion of about ΔM=2.45 × 10-6 M⊙.Furthermore,there is an oscillatory behavior with a period of 18.3±0.3 *** BF Pav does not seem to have significant magnetic activity,this behavior could be interpreted as the light-time effect caused by an undetected third body in this *** this case,the probability for the third body to be a low mass star with M≥ 0.075 M⊙or a brown dwarf is 5.4% and 94.6% *** we assume i’=90°,a3=8.04±0.33 *** mass of the secondary component was also determined following two different methods which result close to each other.

关键词： techniques:photometric binaries:eclipsing stars:individual(BF Pav)

Factors Influencing Strategic Technology Alliance Formation of Malaysian Manufacturers

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Factors Influencing Strategic Technology Alliance Formation ...

Knowledge and Attitude of Pregnant Women toward Elective Cesarean Section in Saudi Arabia

2011 International Conference on Innovation,Management and Service （ICIMS 2011）

作者： Juhaini jabar Claudine Soosay Norfaridatul Akmaliah Othman Nor Hayati Tahir Faculty of Technology Management and Technopreneurship Universiti Teknikal Malaysia Melaka76100 Durian TunggalMelakaMalaysia School of Management University of South AustraliaGPO box 24715001 AdelaideAustralia

This paper examines the relationship between organisations’ resource availability and absorptive capacity as well as type of alliances with organisational *** results are based on survey data from 335 manufacturing organisations in Malaysia that were then analysed using Structural Equation Modelling(SEM).The result establishes that Malaysian manufacturers need to increase their efforts in increasing internal resources that are the source of competitive advantage in order to achieve superior manufacturing performance.

关键词： Strategic technology alliance resources manufacturing Malaysia.

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Open Journal of Nursing 2019年第2期9卷 199-208页

作者： Afaf Abdul-jabar Al Sulamy Shadia A. Yousuf Hala Ahmed Thabet Department of Maternity and Child Nursing Faculty of Nursing King Abdulaziz University Jeddah Saudi Arabia Department of Primary Health Nursing Faculty of Nursing Jeddah Saudi Arabia Woman’s Health and Midwifery Nursing Department Faculty of Nursing Mansoura University Mansoura Egypt

Background: The rate of deliveries by cesarean section (CS) is increasing worldwide. An elective cesarean section (ECS) is a cesarean section carried with or without a medical reason, in some cases choice by pregnant women. The number of women demanding for delivery by elective cesarean section is increasing in Saudi Arabia. Although CS is the commonest major surgery performed in Obstetrics throughout the world;there are still concerns about the knowledge and attitude of Saudi Pregnant women towards it. Methods: The design of this study was a quantitative, descriptive, and cross-sectional design. The study sample consisted of 206 pregnant women attending antenatal clinic during the third trimester, selected by convenience sampling method from Maternity and Children Hospital in Jeddah City in Saudi Arabia. Structured interview questionnaire was used in this study. Different statistical procedures were used for data analysis including percentages, mean, and mean percentages. Content validity and reliability were done. Results: The majorities (78.2%) of the pregnant women have adequate level of knowledge about ECS, 14.6% of them have moderate knowledge, and only 7.3% have inadequate knowledge. Also, 137 (66.5%) of pregnant women have negative attitude toward ECS, while 58 (28.2%) have positive attitude. Conclusion and recommendations: The study concluded that there was a good level of knowledge among pregnant women about ECS in most of the instrument questions in general;except in some areas such as the bad consequences of CS. On the other hand, the majority of the pregnant women had negative attitude toward ECS. Health care provider such as doctors, nurses and midwives should provide adequate knowledge to the pregnant women about consequence of cesarean section on the mother and child. Various interventions are recommended to decline unnecessary cesarean section. These interventions need to contain changes in attitude and correcting misperceptions among pregnant women

关键词： Knowledge Attitude Elective Cesarean Section

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并非如她所愿

英语学习 2012年第4期 40-42页

作者： Diana Abu-jabar

Dielectric Properties and a.c. Conductivity of Epoxy/Alumina Silicate NGK Composites

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Advances in Chemical Engineering and Science 2015年第3期5卷 282-289页

作者： Waleed A. Hussain Abdullah A. Hussein jabar M. Khalaf Ali H. Al-Mowali Abdullwahab A. Sultan Department of Physics College of Education for Pure Science Basrah University Basrah Iraq Department of Material Science Polymer Research Centre University of Basrah Basrah Iraq Department of Chemistry College of Science University of Basrah Basrah Iraq Southern Technical College Basrah Iraq

Alumina silicate powder which is extracted from the obsolete spark plug NGK (insulator part as a filler) has been used to produce epoxy/alumina silicate composite. The dielectric behavior of the composite materials (epoxy resin-alumina silicate NGK) is analyzed as a function of the filler content, temperature and frequency. AC conductivity and impedance are also studied. The results show that the permittivity, dielectric loss and loss tangent for all composites increase with increasing alumina silicate NGK filler content.

关键词： Polymer-Matrix Composites Dielectric Properties Epoxy Alumina Silicate