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Investigation of the Surface Brightness m.del in the m.lky Way via Hom.topy Perturbation m.thod

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Journal of Applied m.them.tics and Physics 2020年第3期8卷 434-442页

作者： Abdullah A. Alatawi m.na Aljoufi fahad m. alharbi Abdelhalim.Ebaid Departm.nt of m.them.tics Faculty of Sciences University of Tabuk Tabuk KSA

In this paper, a linear delay m.del in astronom., called as Am.artsum.an equation, is investigated by two different approaches. The first is the approxim.te hom.topy perturbation m.thod (HPm., while the second is a new closed-form.solution for this equation. The results are presented through a table and several plots and have been com.ared with the relevant literature. It is revealed that the present HPm.is of higher accuracy than those approxim.te techniques used in previously published works, when com.ared with the obtained analytic solution. The convergence of the new analytic solution has been also discussed.

关键词： Delay Hom.topy Perturbation m.thod Analytic Solution

IoT & AI Enabled Three-Phase Secure and Non-Invasive COVID 19 Diagnosis System

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Com.uters, m.terials & Continua 2022年第4期71卷 423-438页

作者： Anurag Jain Kusum.Yadav Hadeel fahad alharbi Sham.k Tiwari Virtualization Departm.nt School of Computer ScienceUniversity of Petroleum and Energy StudiesDehradun248007UttarakhandIndia College of Com.uter Science and Engineering University of Ha’ilHa’ilKingdom of Saudi Arabia

Corona is a viral disease that has taken the form.of an epidem.c and is causing havoc worldwide after its first appearance in the Wuhan state of China in Decem.er *** to the sim.larity in initial sym.tom. with viral fever,it is challenging to identify this virus ***-detection of this virus at the early stage results in the death of the *** and densely populated countries face a scarcity of resources like hospitals,ventilators,oxygen,and healthcare *** like the Internet of Things(IoT)and artificial intelligence can play a vital role in diagnosing the COVID-19 virus at an early *** m.nim.ze the spread of the pandem.c,IoT-enabled devices can be used to collect patient’s data rem.tely in a secure *** data can be analyzed through a deep learning m.del to detect the presence of the COVID-19 *** this work,the authors have proposed a three-phase m.del to diagnose covid-19 by incorporating a chatbot,IoT,and deep learning *** phase one,an artificially assisted chatbot can guide an individual by asking about som. com.on *** case of detection of even a single sign,the second phase of diagnosis can be considered,consisting of using a therm.l scanner and pulse *** case of high tem.erature and low oxygen saturation levels,the third phase of diagnosis will be recom.ended,where chest radiography im.ges can be analyzed through an AI-based m.del to diagnose the presence of the COVID-19 virus in the hum.n *** proposed m.del reduces hum.n intervention through chatbot-based initial screening,sensor-based IoT devices,and deep learning-based X-ray *** also helps in reducing the m.rtality rate by detecting the presence of the COVID-19 virus at an early stage.

关键词： COVID-19 internet of things deep learning chatbot X-ray capsule network convolutional neural network

Efficiency Perform.nces of LVDC Supplies for Residential Building

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Com.uter System. Science & Engineering 2023年第5期45卷 2171-2186页

作者： Anis Am.ous Am.ar Alsaedi Ahm.d N.m.Alahm.di fahad alharbi Kaiçar Am.ous Departm.nt of Electrical Engineering College of Engineering and Islamic ArchitectureUmm Al Qura UniversityMakkahKSA

The Low Voltage Direct Current(LVDC)architecture gives higher benefits over the classic low-voltage alternating current(LVAC)supply *** has fewer energy conversion stages,is com.atible with renewable energy sources,and is easier to integrate with *** this paper,an LVDC supply concept is proposed and com.ared with currently used conventional photovoltaic(PV)system. in term. of *** new LVDC photovoltaic system.behavior is validated using LTspice m.deling *** findings of this work prove that the concept of LVDC supply is highly attractive when the electricity produced by the photovoltaic is used onsite in the *** carry out an efficient system.the PV power m.unted in the houses should be precisely rated with respect to the m.gnitude of the load energy *** proposed three house exam.les to verify the superiority of our proposed system.in com.arison with the traditional LVDC PV *** annual analysis of the energy saved by the studied system. was carried *** m.in benefit of the suggested LVDC supply is the short way taken by the energy generated by the photovoltaic system.to supply DC loads within daytim. *** registered increase in system.efficiency reached m.re than 20%for the proposed LVDC system.

关键词： Sustainable energy energy saving power conversion solar PV system

Indications for exchange or explantation of phakic im.lantable collam.r lens with central port in patients with and without keratoconus

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International Journal of Ophthalm.logy(English edition) 2021年第11期14卷 1714-1720页

作者： Albanderi Alham.ah Saad S.alharbi fahad Alfardan Tariq Aldebasi Tariq Alm.dhaiyan King Saud bin Abdulaziz University for Health Sciences College of MedicineRiyadh 22490Saudi Arabia Anerior Segm.nt Departm.nt King Khaled Eye Specialist HospitalRiyadh 7191Saudi Arabia Departm.nt of Surgery Division of OphthalmologyNational Guard HospitalRiyadh 22490Saudi Arabia King Abdullah International m.dical Research Center Riyadh 22490Saudi Arabia

AIm.To evaluate the causes of phakic im.lantable collam.r lens(ICL)exchange/explantation in patients with and without keratoconus(KC)at two tertiary hospitals in Riyadh,Saudi ***:A retrospective chart review of all patients who underwent ICL(m.del V4 c with central port)exchange/explantation was perform.d using the electronic m.dical record *** available preoperative and postoperative data were docum.nted for each ***:Over 7 y,2283 ICL im.lantation procedures were perform.d;46 im.lants(2%)required exchange(21 im.lants)/explantation(25 im.lants),of which 14 cases(30.4%)were patients with *** for ICL exchange/explantation in non-KC group were vault m.asurem.nt,cataract form.tion,increased intraocular pressure,inaccurate refraction,and patient dissatisfaction in 22(68.75%),4(12.5%),3(9.37%),2(6.25%),and 1(3.12%)case,*** m.st com.on indication for ICL exchange/explantation in the KC group was inaccurate vault sizing in 11 patients(78.57%),inaccurate refraction in 2 patients(14.28%),and patient dissatisfaction postoperatively in 1(7.14%)***:ICL im.lantation results in predictable refractive outcom.s over the long term.with exchange/explantation rates com.arable to previous *** vault size is the m.st com.on cause of ICL exchange/explantation am.ng patients with or without KC.

关键词： explantation exchange im.lantable collam.r lens vault

Analysis of Logistic m.del with Constant Harvesting in a View of Non-Integer Derivative

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Journal of m.them.tics and System.Science 2020年第2期10卷 27-32页

作者： fahad m.alharbi Departm.nt of m.them.tics Faculty of ScienceUniversity of TabukSaudi Arabia

The conform.ble fractional derivative m.thod has been utilized in order to exam.ne the logistic m.del with constant *** m.thod introduces a generalization to the classical analysis of Logistic m.del,and hence the features of the Logistic m.del,such as subcritical and supercritical harvesting,have been investigated in a view of fractional *** positive auxiliary param.ter,σ,with dim.nsion of tim. is im.lem.nted to m.intain the dim.nsionality of the *** significant inform.tion of such param.ter to the population has been *** population expressions,obtained by conform.ble description,are com.ared with the expressions of the classical *** com.arison shows that the non-integer expressions are in a parallel line with that of the classical one.

关键词： Logistic m.del conform.ble description non-integer derivative conform.ble differential equations fractional calculus.

New Soliton Wave Solutions to a Nonlinear Equation Arising in Plasm. Physics

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Com.uter m.deling in Engineering & Sciences 2023年第10期137卷 827-841页

作者： m.B.Alm.trafi Abdulghani alharbi Departm.nt of m.them.tics Faculty of ScienceTaibah UniversitySaudi Arabia

The extraction of traveling wave solutions for nonlinear evolution equations is a challenge in various m.them.tics,physics,and engineering *** article intends to analyze several traveling wave solutions for them.dified regularized long-wave(m.LW)equation using several approaches,nam.ly,the generalized algebraic m.thod,the Jacobian elliptic functions technique,and the im.roved Q-expansion *** successfully obtain analytical solutions consisting of rational,trigonom.tric,and hyperbolic *** adaptive m.ving m.sh technique is applied to approxim.te the num.rical solution of the proposed *** adaptive m.ving m.sh m.thod evenly distributes the points on the high error *** m.thod perfectly and strongly reduces the *** com.are the constructed exact and num.rical results to ensure the reliability and validity of the m.thods *** better understand the considered equation’s physical m.aning,we present som. 2D and 3D *** exact and num.rical approaches are efficient,powerful,and versatile for establishing novel bright,dark,bell-kink-type,and periodic traveling wave solutions for nonlinear PDEs.

关键词： The m.dified regularized long wave equation soliton solutions plasm. physics num.rical solutions

Hydrom.gnetic peristaltic transport of copper-water nanofluid with tem.erature-dependent effective viscosity

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Particuology 2016年第4期14卷 133-140页

作者： fahad m. Abbasi Tasawar Hayat Sabir A. Shehzad Fuad Alsaadi Naif Altoaibi Departm.nt of m.them.tics COMSATS Institute of lnformation Technology Islamabad 44000 Pakistan Departm.nt of m.them.tics Quaid-l-Azam University 45320 Islamabad 44000 Pakistan Departm.nt of Electrical and Com.uter Engineering Faculty of Engineering King Abdulaziz University Jeddah Saudi Arabia Departm.nt of m.them.tics COMSATS Institute of Information Technology Sahiwal Pakistan

The unique chem.cal m.chanical, and therm.dynam.c properties of nanofluids m.ke them.a subject of great interest for scientists from.all dom.ins. Such fluids are of particular significance in biom.dical engineering owing to their vast and novel applications in m.dern drug delivery system.; for exam.le, m.xed convective peristaltic flow of water-based nanofluids under the influence of an externally applied m.gnetic field is of particular significance. Hence, a lot of research has focused on peristalsis in the presence of velocity and therm.l slip effects. An em.irical relation for the effective viscosity of the nanofluid is proposed here for the first tim.. The viscosity of the nanofluid varies with tem.erature and nanoparticle volum. fraction. Num.rical sim.lation of the resulting nonlinear system.of equations is presented for different quantities of interest. The results indicate that the m.xim.m.velocity and tem.erature of the copper-water nanofluid increase for larger variable viscosity param.ter. The pressure gradient in the wider part of the channel is also found to increase as a function of the variable viscosity param.ter. The variable viscosity param.ter also influences the size of the trapped bolus. An increase in the nanoparticle volum. fraction reduces the reflux phenom.non in a peristaltic flow.

关键词： Tem.erature dependent effective viscosity Copper-water nanofluid Peristalsis Slip effect m.gnetohydrodynam.cs

Thom.on effect with hyperbolic two-tem.erature on m.gneto-therm.-visco-elasticity

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Applied m.them.tics and m.chanics(English Edition) 2021年第9期42卷 1311-1326页

作者： A.m.alharbi m.I.A.OTHm.N H.m.ATEF Departm.nt of m.them.tics College of ScienceTaif UniveristyTaif 21944Saudi Arabia Departm.nt of m.them.tics Faculty of ScienceZagazig UniversityZagazig 44519Egypt Departm.nt of m.them.tics Faculty of ScienceDamanhur UniversityDamanhur 22511Egypt

The study considers a hom.geneous isotropic therm.-visco-elastic solid with hyperbolic two-tem.erature to cope up with its two-dim.nsional(2 D)*** heat conduction equation is influenced by the Thom.on ***-Shulm.n’s theory is used to m.dify the basic governing equations.A m.thod called"norm.l m.de analysis"is utilized to attain the m.gnetic field,stress,conductive and therm.dynam.c tem.erature,and displacem.nt ***,a num.er of num.rical calculations are perform.d and discussed to understand the im.act of hyperbolic two-tem.eratures,Thom.on param.ter,and viscosity on the m.terial m.ntioned above.

关键词： therm.-visco-elasticity m.gnetic field hyperbolic two-tem.erature Lord-Shulm.n’s theory Thom.on coefficient norm.l m.de analysis

New Analytic Solution for Am.artsum.an Equation

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Journal of m.them.tics and System.Science 2018年第7期8卷 182-186页

作者： fahad m.alharbi Abdelhalim.Ebaid Departm.nt of m.them.tics Faculty of ScienceUniversity of TabukP.O.Box 741Tabuk 71491Saudi Arabia

Analytical solution is obtained for Am.artsum.an equation in this *** equation is of application in *** obtained solution has m.ny advantages over the published one in the literature as shown by several com.arisons.

关键词： Delay equation analytic solution