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Effect of Rotation on the Propagation of Waves in Hollow Poroelastic Circular Cylinder with magnetic Field

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Computers, materials & Continua 2017年第2期53卷 129-156页

作者： a.m.farhan physics department faculty of science jazan university-K.S.A physics department faculty of sciencezagazig universityzagazig

Employing Biot’s theory of wave propagation in liquid saturated porous media,the effect of rotation and magnetic field on wave propagation in a hollow poroelastic circular of infinite extent is *** exact closed form solution is *** frequency equations for propagation of poroelastic cylinder are obtained when the boundaries are stress *** frequencies are calculated for poroelastic cylinder for different values of magnetic field and *** results are given and illustrated *** results indicate that the effect of rotation,and magnetic field are very *** a model would be useful in large-scale parametric studies of mechanical response.

关键词： Wave propagation rotation magnetic field poroelastic medium natural frequency.

Effect of rotation on the surface wave propagation in magneto-thermoelastic materials with voids

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Journal of Ocean Engineering and Science 2018年第4期3卷 334-342页

作者： a.m.farhan A.m.Abd-Alla Physics Department Faculty of ScienceJazan UniversitySaudi Arabia Physics Department Faculty of ScienceZagzig UniversityEgypt mathematics Department Faculty of ScienceSohag UniversityEgypt

The present investigation is focused on studying the surface wave propagation in a generalized magneto-thermoelastic materials taking(Green Lindsay)model with *** general surface wave speed is derived to study the effects of magnetic field and rotation on surface wave in the presence of *** addition the present study can be comprehensively applied to the magneto-thermoelastic medium with *** possible non-dimensional frequency of surface wave propagation has been obtained as the solution of an algebraic equation involving a determinant whose elements contain the material parameters,the direction of applied magnetic field and rotation of surface wave *** comparisons for the physical quantities are established numerically and represented graphically in different cases with respect to the used effects.

关键词： Green Lindsay theory Thermoelasticity Surface waves.

Numerical Solution of a Problem of Thermal Stresses of a magnetothermoelastic Cylinder with Rotation by Finite-Difference method

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Computers, materials & Continua 2021年第9期68卷 3339-3352页

作者： F.S.Bayones A.m.Abd-Alla a.m.farhan Department of mathematics and Statistics College of ScienceTaif UniversityTaif21944Saudi Arabia Department of mathematics Faculty of ScienceSohag UniversityEgypt Physics Department Faculty of ScienceJazan UniversityJazanSaudi Arabia Physics Department Faculty of ScienceZagazig UniversityZagazigEgypt

The present article deals with the investigation thermal stress of a magnetothermoelastic cylinder subjected to rotation,open or closed circuit,thermal and mechanical boundary *** outer and inner surfaces of the cylinder are subjected to both mechanical and thermal boundary conditions.A The transient coupled thermoelasticity in an infinite cylinder with its base abruptly exposed to a heat flux of a decaying exponential function of time is devised solve by the finite-difference *** fundamental equations’system is solved by utilizing an implicit finite-difference *** current method is a second-order accurate in time and space;it is also unconditionally *** illustrate the present model’s efficiency,we consider a suitable material and acquire the numerical solution of temperature,displacement components,and the components of stresses with time t and through the radial of an infinite *** results indicate that the effect of coupled thermoelasticity,magnetic field,and rotation on the temperature,stresses,and displacement is quite *** order to illustrate and verify the analytical developments,the numerical solution of partial differential equations,stress components,displacement components and temperature is carried out and computer simulated results are presented *** study is helpful in the development of piezoelectric devices.

关键词： Thermoelasticity thermal stress finite-difference method non-homogeneous material rotation magnetic field

Solution of a problem of thermal stresses in a non-homogeneous thermoelastic infinite medium of isotropic material by finite difference method

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Journal of Ocean Engineering and Science 2019年第3期4卷 256-262页

作者： a.m.farhan A.m.Abd-Alla moaiad A.Khder Physics Department Faculty of ScienceJazan UniversitySaudi Arabia Physics Department Faculty of ScienceZagzig UniversityEgypt mathematics Department Faculty of ScienceSohag UniversityEgypt Department of Computer Science Applied Science UniversityBahrain

The present work deals with a new problem of thermoelasticity for an infinitely long and isotropic circular cylinder of temperature dependent physical *** inner and outer curved surfaces of the cylinder are subjected to both the mechanical and thermal boundary conditions.A finite difference model is developed to derive the solution of the problem in which the governing equations are uncoupled linear partial differential *** transient solution at any time can be evaluated directly from the *** order to demonstrate the efficiency of the present model we consider a suitable material and obtain the numerical solution of displacement,temperature,and stresses inside the cylinder for the homogeneous-dependent material properties of the *** results are analyzed with the help of different graphical plots.

关键词： Thermal stress Thermoelasticity Wave propagation Finite difference method Non-homogeneous medium

Rotational Effect on the Propagation of Waves in a magneto-micropolar Thermoelastic medium

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Computers, materials & Continua 2021年第10期69卷 205-220页

作者： A.m.Abd-Alla S.m.Abo-Dahab m.A.Abdelhafez a.m.farhan Department of mathematics Faculty of ScienceSohag UniversitySohagEgypt Department of mathematics Faculty of ScienceSouth Valley University83523Egypt Department of Physics Faculty of ScienceJazan UniversityJazanSaudi Arabia Department of Physics Faculty of ScienceZagazig UniversityZagazigEgypt

The present paper aims to explore how the magnetic field,ramp parameter,and rotation affect a generalized micropolar thermoelastic medium that is standardized isotropic within the *** employing normal mode analysis and Lame’s potential theory,the authors could express analytically the components of displacement,stress,couple stress,and temperature field in the physical *** calculated such manners of expression numerically and plotted the matching graphs to highlight and make comparisons with theoretical *** highlights of the paper cover the impacts of various parameters on the rotating micropolar thermoelastic ***,the non-dimensional temperature is not affected by the rotation and the magnetic *** attention is paid to studying the impact of the magnetic field,rotation,and ramp parameter of the distribution of temperature,displacement,stress,and couple *** study highlighted the significant impact of the rotation,magnetic field,and ramp parameter on the micropolar thermoelastic *** conclusion,graphical presentations were provided to evaluate the impacts of different parameters on the propagation of plane waves in thermoelastic media of different *** study may help the designers and engineers develop a structural control system in several applied fields.

关键词： magnetic field micropolar thermoelastic rotation ramp parameter normal mode analysis

Overall Assessment of Heat Transfer for a Rarefied Flow in a microchannel with Obstacles Using Lattice Boltzmann method

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工程与科学中的计算机建模(英文) 2024年第1期138卷 273-299页

作者： Siham Hammid Khatir Naima Omolayo m.Ikumapayi Cheikh Kezrane Abdelkrim Liazid Jihad Asad mokdad Hayawi Rahman farhan Lafta Rashid Naseer Ali Hussien Younes menni Laboratory of Development in mechanics and materials(LDmm) Zian Achour UniversityDjelfaPB 3117Algeria Department of Technology University Center Salhi Ahmed Naama(Ctr.Univ.Naama)P.O.Box 66Naama45000Algeria Department of mechanical and mechatronics Engineering Afe Babalola University Ado Ekiti360101Nigeria Departement of Physics Faculty of ScienceAbou Bekr Belkaid UniversityTlemcen13000Algeria Department of Physics Faculty of Applied SciencesPalestine Technical University-KadoorieTulkarmPalestine Aeronautical Technical Engineering Al-Farahidi UniversityBaghdad10011Iraq mechanical Engineering Department University of KerbalaKarbala56001Iraq Information and Communication Technology Research Group Scientific Research CenterAl-Ayen UniversityThi-QarIraq National University of Science and Technology Dhi QarIraq

The objective of this investigation is to assess the effect of obstacles on numerical heat transfer and fluid flow momentum in a rectangular microchannel(mC).Two distinct configurations were studied:one without obstacles and the other with alternating obstacles placed on the upper and lower *** research utilized the thermal lattice Boltzmann method(LBm),which solves the energy and momentum equations of fluids with the BGK approximation,implemented in a Python coding *** jump and slip velocity conditions were utilized in the simulation for the mC and extended to all obstacle *** study aims to analyze the rarefaction effect,with Knudsen numbers(Kn)of 0.012,0.02,and *** outcomes indicate that rarefaction has a significant impact on the velocity and temperature *** presence of nine obstacles led to slower fluid movement inside the microchannel mC,resulting in faster cooling at the *** mCs with obstacles,the rarefaction effect plays a crucial role in decreasing the Nusselt number(Nu)and skin friction coefficient(Cf).Furthermore,the study demonstrated that the obstacles played a crucial role in boosting fluid flow and heat transfer in the *** findings suggest that the examined configurations could have potential applications as cooling technologies in micro-electro-mechanical systems and microdevice applications.

关键词： microfluid rarefied flow LBm microchannel Knudsen number numerical simulation

In silico identification of antiviral compounds for the treatment of chikungunya virus infection:qsar modelling and md simulation analysis

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medicine in Novel Technology and Devices 2024年第2期22卷 102-114页

作者： Hayder m Abdulhamza muthanna S.farhan Sara.S Hassan Hany Aqeel Al-Hussainy Amjad Ibrahim Oriabi Department of Pharmacy Kut University CollegeAlkutWasit52001Iraq Department of Pharmaceutical Chemistry College of PharmacyUniversity of BaghdadBaghdadIraq Al-manara College for medical Sciences Department of PharmacyIraq Department of Pharmacy Hilla University CollegeBabylonIraq Dr Hany Akeel Institute Iraqi Medical Research CenterBaghdad10001Iraq

Chikungunya virus(CHIKV),transmitted by arthropods,has gained global recognition for its impact on public *** has expanded globally,including Africa,Asia,and the Indian subcontinent,and has a helicase protein in its genome that is crucial for its ***,the study targeted the helicase protein of CHIKV with 745 antiviral compounds using an mL-based QSAR model and molecular *** binders(5279172,78161839,6474310,and 5330286)were selected for mD simulation based on the control(Silvestrol).All compounds had the highest binding scores,with 78161839 showing the most consistent RmSD and the least conformational variation,indicating high *** also showed the lowest binding free energy(ΔG¼31.31 kcal/mol),indicating energetically favourable *** and FEL also depicted the stable complex confirmation of the protein and 78161839 complex during the 100 ns ***,this study aimed to identify helicase function antiviral binders that could be experimentally tested for treating CHIKV.

关键词： Chikungunya virus machine learning based QSAR molecular dynamic solution Helicase

Autologous hematopoietic stem cell transplantation conditioning regimens and chimeric antigen receptor T cell therapy in various diseases

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World Journal of Transplantation 2024年第1期14卷 32-41页

作者： Shahzaib maqbool maryam farhan Baloch muhammad Abdul Khaliq Khan Azeem Khalid Kiran Naimat Department of medicine Holy Family HospitalRawalpindi 46000Pakistan Department of Community medicine Allama Iqbal Medical CollegeLahore 45000Pakistan Department of Community Dentistry Baqai Medical UniversityKarachi 43000Pakistan Department of medicine Allama lqbal Medical CollegeLahore 45000Pakistan Department of medicineLiaquat University of medical and Health Sciences Karachi 43000Pakistan

Conditioning regimens employed in autologous stem cell transplantation have been proven useful in various hematological disorders and underlying malignancies;however,despite being efficacious in various instances,negative consequences have also been *** conditioning regimens were extracted from various literature searches from databases like Pubmed,Google scholar,EmBASE,and *** regimens for each disease were compared by using various end points such as overall survival(OS),progression free survival(PFS),and leukemia free survival(LFS).Variables were presented on graphs and analyzed to conclude a more efficacious conditioning *** multiple myeloma,the most effective regimen was high dose melphalan(mEL)given at a dose of 200/mg/*** comparative results of acute myeloid leukemia were presented and the regimens that proved to be at an admirable position were busulfan(BU)+mEL regarding OS and BU+VP16 regarding *** case of acute lymphoblastic leukemia(ALL),BU,fludarabine,and etoposide(BuFluVP)conferred good disease control not only with a paramount improvement in survival rate but also low risk of ***,for ALL,chimeric antigen receptor(CAR)T cell therapy was preferred in the context of better OS and *** respect to Hodgkin’s lymphoma,mitoxantrone(mITO)/mEL overtook carmustine,VP16,cytarabine,and mEL in view of PFS and vice versa regarding ***-Hodgkin’s lymphoma patients were administered mITO(60 mg/m2)and mEL(180 mg/m2)which showed promising ***,amyloidosis was considered,and the regimen that proved to be competent was mEL 200(200 mg/m2).This review article demonstrates a comparison between various conditioning regimens employed in different diseases.

关键词： Conditioning regimens multiple myeloma Lymphoma Hodgkin Non-Hodgkin Acute leukemia

Big Data Analytics Using Graph Signal Processing

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Computers, materials & Continua 2023年第1期74卷 489-502页

作者： farhan Amin Omar m.Barukab Gyu Sang Choi Department of Information and Communication Engineering Yeungnam UniversityGyeongsan38541Korea Faculty of Computing and Information Technology-Rabigh King Abdulaziz UniversityJeddahSaudi Arabia

The networks are fundamental to our modern world and they appear throughout science and *** to a massive amount of data presents a unique opportunity to the researcher’s *** networks grow in size the complexity increases and our ability to analyze them using the current state of the art is at severe risk of failing to keep ***,this paper initiates a discussion on graph signal processing for large-scale data *** first provide a comprehensive overview of core ideas in Graph signal processing(GSP)and their connection to conventional digital signal processing(DSP).We then summarize recent developments in developing basic GSP tools,including methods for graph filtering or graph learning,graph signal,graph Fourier transform(GFT),spectrum,graph frequency,*** filtering is a basic task that allows for isolating the contribution of individual frequencies and therefore enables the removal of *** then consider a graph filter as a model that helps to extend the application of GSP methods to large *** show the suitability and the effeteness,we first created a noisy graph signal and then applied it to the *** several rounds of simulation *** see that the filtered signal appears to be smoother and is closer to the original noise-free distance-based *** using this example application,we thoroughly demonstrated that graph filtration is efficient for big data analytics.

关键词： Big data data science big data processing graph signal processing social networks