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Hydromagnetic flow of a Cu water nanofluid past a moving wedge with viscous dissipation

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Chinese Physics B 2014年第4期23卷 365-372页

作者： A.M.Salem Galal ismail Rania Fathy Department of Mathematics Faculty of Science and Arts Qassim University Department of Basic Science Faculty of Computers and Informatics Suez Canal University Department of Mathematics Faculty of Science Zagazig University

A numerical study is performed to investigate the flow and heat transfer at the surface of a permeable wedge immersed in a copper （Cu）-water-based nanofluid in the presence of magnetic field and viscous dissipation using a nanofluid model proposed by Tiwari and Das （Tiwari I K and Das M K 2007 Int. J. HeatMass Transfer 50 2002）. A similarity solution for the transformed governing equation is obtained, and those equations are solved by employing a numerical shooting technique with a fourth-order Runge-Kutta integration scheme. A comparison with previously published work is carried out and shows that they are in good agreement with each other. The effects of velocity ratio parameter ~, solid volume fraction tp, magnetic field M, viscous dissipation Ec, and suction parameter Fw on the fluid flow and heat transfer characteristics are discussed. The unique and dual solutions for self-similar equations of the flow and heat transfer are analyzed numerically. Moreover, the range of the velocity ratio parameter for which the solution exists increases in the presence of magnetic field and suction parameter.

关键词： nanofluid dual solution magnetic field viscous dissipation

Molecular characteristics,antibiogram and prevalence of multi-drug resistant Staphylococcus aureus (MDRSA) isolated from milk obtained from culled dairy cows and from cows with acute clinical mastitis

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Asian Pacific Journal of Tropical Biomedicine 2017年第8期7卷 694-697页

作者： Zuhair Bani ismail Department of Veterinary Clinical Sciences Faculty of Veterinary MedicineJordan University of Science and TechnologyIrbid22110Jordan

To study the molecular characteristics, antibiogram and prevalence of multi-drug resistant Staphylococcus aureus (S. aureus) (MDRSA) isolated from milk obtained from culled dairy cows and from cows with acute clinical *** were cultured from 188 quarter milk samples obtained from cows before culling (n = 139) and from cows affected with acute mastitis (n = 49) belonging to 10 dairy farms. The bacteria were identified using colony morphology, Gram staining and biochemical characteristics. S. aureus isolates were then subjected to molecular characterization using PCR targeting 16S rRNA and mecA gene to identify Methicillin resistant S. aureus (MRSA). The antibiogram of all isolates was performed using the Kirby-Bauer disk diffusion method against 10 commonly used antibiotics in dairy ***. aureus was isolated from 19 (13.7%) samples obtained from culled cows and 11 (22.4%) samples obtained from cows with acute mastitis. In both culled cows and cows with acute mastitis, in vitro antibiogram revealed that 100% of S. aureus isolates were resistant to erythromycin, penicillin G, streptomycin, doxycyclin, and trimethoprim/sulpha. The prevalence of MRSA in milk of culled cows and cows with acute mastitis was 26.3% and 18.2%, respectively, with an overall prevalence of 3.7% among all samples. All MRSA isolates were completely resistant to all tested antibiotics. All MRSA isolates were positive for the presence of the mecA *** carrying the mecA gene were isolated from mastitic milk from dairy cows in Jordan for the first time. MRSA may pose a potential health risk to the public, farm workers and veterinarians.

关键词： Antibiogram Mastitis pathogens Dairy cows Multi-drug resistance

The Methodology of Probe Design with Better Resolution and Less Resistive Donut Probe to Achieve the Best Performance

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Journal of Bionic Engineering 2009年第3期6卷 239-245页

作者： Mohammad ismail Talukder Pepe Siy Gregory Auner Department of Electrical and Computer Engineering Wayne State University

Probes are the interface between microsystems and *** ideal interface is one-to-one *** various research groups have been able to establish some sort of interfaces after many years of research,they are very *** are millions in numbers,whereas the prostheses successfully built so far have only a few hundred probes at *** an ef- fective interface is still far *** we have micro-and nano-technologies,we couldn't build a prosthesis with an effective *** reasons behind it are the type of probe being used and the poor design of the *** address this problem,we developed a methodology to design a probe and an array of probes with better resolution and less resistive donut *** methodology helps us to design a probe optimizing all the *** presented our methodology through a design that is capable of 70 μm penetration inside the *** tissue heating by our designed probe is only 0.411 °*** also characterized the donut probe,which could be used by any research group to design a donut probe of their specific need.

关键词： donut probe resolution methodology retina prosthesis probe design

Low Cost,Low Power Magnetic IEDs Detection Method Using Biaxial Magnetometry Digital Sensors

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Journal of Electronic Science and Technology 2016年第3期14卷 229-233页

作者： Hamzah Naser Alrawi Widad ismail the auto-id Laboratory School of Electrical&Electronics EngineeringEngineering CampusUniversiti Sains MalaysiaNibong TebalPenangMalaysia

The magnetic improvised explosive devices （IEDs）, also commonly known as a type of a sticky bomb, is simply constructed devices yet very lethal. This paper puts forward the idea of an electronic compass that is capable of sensing the change of a magnetic field generated by a magnet and translating it into interpretable data, which could act as the base for the further studies and assist in developing a greener automated system for detecting this device. The electronic compass is specifically chosen for reducing power consumption of systems in addition to the fact that it is available at a low cost.

关键词： Compass detect low power sensor improvised explosive devices (lED) magnets magnetometer.

Improving Asynchronous Motor Speed and Flux Loop Control by Using Hybrid Fuzzy-SMC Controllers

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International Journal of Automation and computing 2014年第4期11卷 361-367页

作者： ismail Bendaas Farid Naceri Sebti Belkacem Department of Electrical Engineering Batna University

This paper presents a new method combining sliding mode control(SMC) and fuzzy logic control(FLC) to enhance the robustness and performance for a class of non-linear control systems. This fuzzy sliding mode control(FSMC) is developed for application in the area for controlling the speed and flux loops of asynchronous motors. The proposed control law can solve those problems associated with the conventional control by sliding mode control, such as high current, flux and torque chattering, variable switching frequency and variation of parameters, in which a robust fuzzy logic controller replaces the discontinuous part of the classical sliding mode control law. Simulation results of the proposed FSMC technique on the speed and flux rotor controllers present good dynamic and steady-state performances compared to the classical SMC in terms of reduction of the torque chattering, quick dynamic torque response and robustness to disturbance and variation of parameters.

关键词： Induction motor sliding mode control fuzzy logic control fuzzy sliding mode control chattering phenomenon

ON THE WEIGHTED VARIABLE EXPONENT AMALGAM SPACE W(L^(p(x)), L_m^q)

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Acta Mathematica Scientia 2014年第4期34卷 1098-1110页

作者： A. Turan GRKANLI ismail AYDIN Department of Mathematics and Computer Science Faculty of Sciences and LettersIstanbul Arel UniversityTurkoba Mathallesi Erguvan Sokak No: 26/K34537Tepekent-BuyukcekmeceIstanbulTurkey Department of Mathematics Faculty of Arts and SciencesSinop University

In [4], a new family W（L^p（x）, Lm^q） of Wiener amalgam spaces was defined and investigated some properties of these spaces, where local component is a variable exponent Lebesgue space L^p（x）（R） and the global component is a weighted Lebesgue space Lm^q （R）. This present paper is a sequel to our work [4]. In Section 2, we discuss necessary and sufficient conditions for the equality W （L^p（x）, Lm^q） = L^q （R）. Later we give some characterization of Wiener amalgam space W （L^p（x）, Lm^q）.In Section 3 we define the Wiener amalgam space W （FL^p（x）, Lm^q） and investigate some properties of this space, where FL^p（x） is the image of L^p（x） under the Fourier transform. In Section 4, we discuss boundedness of the Hardy- Littlewood maximal operator between some Wiener amalgam spaces.

关键词： weighted Lebesgne space variable exponent Lebesgue

Direct C-H Bond Activation of Benzoxazole and Benzothiazole with Aryl Bromides Catalyzed by Palladium（Ⅱ）-N-heterocyclic Carbene Complexes

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Chinese Journal of Chemistry 2018年第9期36卷 837-844页

作者： Murat Kaloglu Nazan Kaloglur ismail Ozdemir Department of Chemistry Faculty of Science and Arts inonu University 44280 Malatya Turkey Catalysis Research and Application Center inonu University 44280Malatya Turkey

Herein, we report that a series of novel palladium（II）-NHC complexes （NHC=N-heterocyclic carbene） were synthesized. The structures of all novel complexes were characterized by ^1H NMR, ^13C NMR, FT-IR spectroscopy and elemental analysis techniques. These palladium（ll）-NHC complexes were tested as efficient catalysts in the direct C-H bond activation of benzoxazole and benzothiazole with aryl bromides in the presence of 1 mol% catalyst loading at 150 ℃ for 4 h. Under the given conditions, various aryl bromides were successfully applied as the arylating reagents to achieve the 2-arylbenzoxazoles and 2-arylbenzothiazoles in acceptable to high yields.

关键词： benzimidazolium bromide benzoazoles direct C-H bond activation N-heterocyclic carbene palladium

Power system voltage instability risk mitigation via emergency demand response-based whale optimization algorithm

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Protection and Control of Modern Power Systems 2019年第1期4卷 295-308页

作者： Mohammed Amroune Tarek Bouktir ismail Musirin Department of Electrical Engineering University of Ferhat Abbas Setif 119000SetifAlgeria Faculty of Electrical Engineering Universiti Teknologi MARA40450Shah AlamMalaysia

In recent years, due to the economic and environmental issues, modern power systems often operate proximately to the technical restraints enlarging the probable level of instability risks. Hence, efficient methods for voltage instability prevention are of great importance to power system companies to avoid the risk of large blackouts. In this paper, an event-driven emergency demand response (EEDR) strategy based on whale optimization algorithm (WOA) is proposed to effectively improve system voltage stability. The main objective of the proposed EEDR approach is to maintain voltage stability margin (VSM) in an acceptable range during emergency situations by driving the operating condition of the power system away from the insecure points. The optimal locations and amounts of load reductions have been determined using WOA algorithm. To test the feasibility and the efficiency of the proposed method, simulation studies are carried out on the IEEE 14-bus and real Algerian 114-bus power systems.

关键词： Voltage stability Emergency demand response Whale optimization algorithm Blackouts

Experimental determination of Cd2+ adsorption mechanism on low-cost biological waste

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Frontiers of Environmental Science & Engineering 2013年第3期7卷 356-364页

作者： Farhah Amalya ismail Ahmad Zaharin ARIS Environmental Forensics Research Centre Faculty of Environmental StudiesUniversiti Putra MalaysiaUPM Serdang 43400Malaysia

Carbonate shells have an astonishing ability in the removal of Cd2+in a short time period with emphasis on being a low cost *** the present study,the sorption capacity of carbonate shells was studied for Cd2+in batch *** infuence of different carbonate shell sizes and physico-chemical factors were evaluated and the results were analyzed for its correlation matrices by using Predictive Analytics Software(PASW).The mineralogy state of aqueous solution regarding the saturation index was simulated using PHREEQC to identify the Cd2+uptake *** Cd uptake rates were calculated as well as Ca2+,HCO–3concentration,pH,ambient humidity and temperature were ***2+removal of 91.52%was achieved after 5 h *** adsorption effciencies were signifcantly infuenced by pH as they increased with the increase of pH from acidic solution(5.50 0.02)to slightly alkaline(7.60 0.05).In addition,the mineralogy state of aqueous solution calculated from PHREEQC confrmed that the increment of Ca2+and HCO–3concentrations in solution was attributed to the dissolution of carbonate ***,the ion exchange adsorption mechanism of Cd2+toward Ca2+was identifed as the process involved in Cd2+uptake.

关键词： carbonate shell cadmium heavy metal adsorption mechanism saturation state