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On the Rayleigh-Plateau instability

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Applied Mathematics(A Journal of Chinese Universities) 2012年第2期27卷 127-138页

作者： ali AL Riyabi Mohammed Boutat sad Hilout Laboratoire de Mathématiques Université de PoitiersBoulevard Marie et Pierre CurieTéléport 2BP 3017986962 Futuroscope Chasseneuil cedexFrance

In this paper,we study the surface instability of a cylindrical pore in the absence of *** instability is called the Rayleigh-Plateau *** consider the model developed by Spencer et al.[18],Kirill et al.[10]and Boutat et al.[2]in the case without *** obtain a nonlinear parabolic PDE of order *** show the local existence and uniqueness of the solution of this problem by using Faedo-Galerkin *** main results are the global existence of the solution and the convergence to the mean value of the initial data for long *** tests are also presented in this study.

关键词： parabolic nonlinear partial differential equation initial boundary value problem local solution uniqueness stability.

Polynomials of Degree-Based Indices for Three-Dimensional Mesh network

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Computers, Materials & Continua 2020年第11期65卷 1271-1282页

作者： ali n.A.Koam ali Ahmad Department of Mathematics College of ScienceJazan UniversityJazan45142Saudi Arabia College of Computer Science and Information Technology Jazan UniversityJazan45142Saudi Arabia

In order to study the behavior and interconnection of network devices,graphs structures are used to formulate the properties in terms of mathematical *** network(meshnet)is a LAn topology in which devices are connected either directly or through some intermediate *** terminating and intermediate devices are considered as vertices of graph whereas wired or wireless connections among these devices are shown as edges of *** indices are used to reflect structural property of graphs in form of one real *** structural invariant has revolutionized the field of chemistry to identify molecular descriptors of chemical *** indices are extensively used for establishing relationships between the structure of nanotubes and their physico-chemical *** this paper a representation of sodium chloride(naCl)is studied,because structure of naCl is same as the Cartesian product of three paths of length exactly like a mesh *** this way the general formula obtained in this paper can be used in chemistry as well as for any degree-based topological polynomials of three-dimensional mesh networks.

关键词： Topological polynomials degree-based index three-dimensional mesh network chemical compounds

Advanced hydrogen storage of the Mg–na–Al system:A review

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Journal of Magnesium and Alloys 2021年第4期9卷 1111-1123页

作者： n.A.ali M.Ismail Energy Storage Research Group Faculty of Ocean Engineering Technology and InformaticsUniversiti Malaysia Terengganu21030 Kuala NerusTerengganuMalaysia

A solid-state storage system is the most practical option for hydrogen because it is more convenient and *** hydrides,especially MgH_(2),are the most promising materials that offer high gravimetric capacity and good ***,the practical application of MgH_(2) is restricted by slow sorption kinetics and high stability of thermodynamic *** storage performance of MgH_(2) was enhanced by introducing the Mg–na–Al system that destabilises MgH_(2) with naAlH_(4).The Mg–na–Al system has superior performance compared to that of unary MgH_(2) and naAlH_(4).To boost the performance of the Mg–na–Al system,the ball milling method and the addition of a catalyst were *** Mg–na–Al system resulted in a low onset decomposition temperature,superior cyclability and enhanced kinetics *** Al_(12)Mg_(17) and naMgH_(3) that formed in situ during the dehydrogenation process modify the reaction pathway of the Mg–na–Al system and alter the thermodynamic *** this paper,the overview of the recent progress in hydrogen storage of the Mg–na–Al system is *** remaining challenges and future development of Mg–na–Al system are also *** paper is the first review report on hydrogen storage properties of the Mg–na–Al system.

关键词： Mg-na-Al system MgH_(2) naAlH_(4) Al_(12)Mg_(17) hydrogen storage

Gastrointestinal motility and absorptive disorders in patients with inflammatory bowel diseases: Prevalence, diagnosis and treatment

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World Journal of Gastroenterology 2019年第31期25卷 4414-4426页

作者： Luísa Leite Barros Alberto Queiroz Farias ali Rezaie Department of Gastroenterology University of Sao Paulo School of MedicineSao Paulo 05403-000Brazil Division of Gastroenterology Department of MedicineCedars Sinai Medical CenterLos AngelesCA 90048United States

Inflammatory bowel diseases(IBD),Crohns disease and ulcerative colitis,are chronic conditions associated with high morbidity and healthcare *** natural history of IBD is variable and marked by alternating periods of flare and *** though the use of newer therapeutic targets has been associated with higher rates of mucosal healing,a great proportion of IBD patients remain symptomatic despite effective control of *** symptoms may include but not limited to abdominal pain,dyspepsia,diarrhea,urgency,fecal incontinence,constipation or *** this setting,commonly there is an overlap with gastrointestinal(GI)motility and absorptive *** recognition of these conditions greatly improves patient care and may decrease the risk of ***,in this review we describe the prevalence,diagnosis and treatment of GI motility and absorptive disorders that commonly affect patients with IBD.

关键词： Inflammatory bowel diseases Crohn’s disease Ulcerative colitis Gastrointestinal motility and absorptive disorders Irritable bowel syndrome Small intestinal bacterial overgrowth Small intestinal fungal overgrowth Dyssynergic defecation Fecal incontinence Chronic intestinal pseudo-obstruction

Slip effects on streamline topologies and their bifurcations for peristaltic flows of a viscous fluid

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Chinese Physics B 2014年第6期23卷 341-352页

作者： Z.Asghar n.ali Department of Mathematics and Statistics International Islamic University

We discuss the effects of the surface slip on streamline patterns and their bifurcations for the peristaltic transport of a newtonian fluid. The flow is in a two-dimensional symmetric channel or an axisymmetric tube. An exact expression for the stream function is obtained in the wave frame under the assumptions of long wavelength and low Reynolds number for both cases. For the discussion of the particle path in the wave frame, a system of nonlinear autonomous differential equations is established and the methods of dynamical systems are used to discuss the local bifurcations and their topological changes. Moreover, all types of bifurcations and their topological changes are discussed graphically. Finally, the global bifurcation diagram is used to summarize the bifurcations.

关键词： viscous fluid slip condition streamline topologies bifurcation

Weak deflection angle of extended uncertainty principle black holes

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Chinese Physics C 2020年第2期44卷 128-133页

作者： Yashmitha Kumaran ali Ovgün Physics Department Arts and Sciences FacultyEastern Mediterranean UniversityFamagustaNorth Cyprus via Mersin 10Turkey Instituto de Física Pontificia Universidad Católica de ValparaísoCasilla 4950ValparaísoChile

We discuss the effects of quantum fluctuations spewed by a black hole on its deflection *** GaussBonnet theorem(GBT)is exploited with quantum corrections through the extended uncertainty principle(EUP),and the corresponding deflection angle is ***,we have attempted to broaden the scope of our work by subsuming the effects of plasma medium on the deflection *** demonstrate the degree of difference,the acquired results are compared with the prevailing findings.

关键词： deflection of light gravitational lensing massive photon black hole Gauss-Bonnet theorem extended uncertainty principle quantum gravity

The Kemeny’s Constant and Spanning Trees of Hexagonal Ring network

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Computers, Materials & Continua 2022年第12期73卷 6347-6365页

作者： Shahid Zaman ali n.A.Koam ali Al Khabyah ali Ahmad Department of Mathematics University of SialkotSialkot51310Pakistan Department of Mathematics College of ScienceJazan UniversityNew CampusSaudi Arabia College of Computer Sciences and Information Technology Jazan UniversityJazanSaudi Arabia

Spanning tree(τ)has an enormous application in computer science and chemistry to determine the geometric and dynamics analysis of compact *** the field of medicines,it is helpful to recognize the epidemiology of hepatitis C virus(HCV)*** the other hand,Kemeny’s constant(Ω)is a beneficial quantifier characterizing the universal average activities of a Markov *** network invariant infers the expressions of the expected number of time-steps required to trace a randomly selected terminus state since a fixed beginning state *** and Loizou determined that the Kemeny’s constant can also be obtained through *** by Levene and Loizou,we deduced the Kemeny’s constant and the number of spanning trees of hexagonal ring network by their normalized Laplacian eigenvalues and the coefficients of the characteristic *** on the achieved results,entirely results are obtained for the M鯾ius hexagonal ring network.

关键词： Matrix Analysis hexagonal ring network Kemeny’s constant Spanning tree

Tunneling of massive vector particles under influence of quantum gravity

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Chinese Physics C 2020年第1期44卷 149-158页

作者： Wajiha Javed Riasat ali Rimsha Babar aliÖvgün Division of Science and Technology University of EducationTownship-LahorePakistan Department of Mathematics Government CollegeUniversity Faisalabad Layyah CampusLayyah-31200Pakistan Instituto de Física Pontificia Universidad Católica de ValparaísoCasilla 4950ValparaísoChile Physics Department Faculty of Arts and SciencesEastern Mediterranean UniversityFamagustaNorth Cyprusvia Mersin 10Turkey

This study set out to investigate charged vector particles tunneling via horizons of a pair of accelerating rotating charged nUT black holes under the influence of quantum *** this end,we use the modified Proca equation incorporating generalized uncertainty *** the WKB approximation to the field equation,we obtain a modified tunneling rate and the corresponding corrected Hawking temperature for this black ***,we analyze the graphical behavior of the corrected Hawking temperature T'_H with respect to the event horizon for the given black *** considering quantum gravitational effects on Hawking temperatures,we discuss the stability analysis of this black *** a pair of black holes,the temperature T'_H increases with the increase in rotation parameters a andω,correction parameterβ,black hole acceleration a,and arbitrary parameter k,and decreases with the increase in electric e and magnetic charges g.

关键词： massive boson particles wave equation quantum gravity Hawking radiation black hole thermodynamics

Compression properties of cost-efficient porous expanded clay reinforced AA7075 syntactic foams fabricated by industrial-oriented die casting technology

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China Foundry 2024年第1期21卷 60-70页

作者： İsmail Cem Akgün Çağın Bolat ali Gökşenli Faculty of Mechanical Engineering Istanbul Technical University34437İstanbulTurkey Faculty of Engineering Samsun University55420SamsunTurkey

In today’s manufacturing industries,hard competition between rival firms makes it compulsory for researchers to design lighter and cheaper machine components due to the megatrends of cost-effectiveness and *** this point,aluminum syntactic foams(ASFs)are new-generation engineering composites and come into the upfront as a *** to their features like low density,sufficient elongation,and perfect energy absorption ability,these advanced foams have been considerably seductive for many industrial sectors *** this study,an industrial-oriented automatic die casting technology was used for the first time to manufacture the combination of AA7075/porous expanded clay(PEC).Micro evaluations(optical and FESEM)reveal that there is a homogenous particle distribution in the foam samples,and inspections are compatible with the other ASF ***,T6 aging heat treatment was operated on one half of the produced foams to explore the probable impact of aging on the compressive *** results show that PEC particles can be an alternative to expensive hollow spheres used in the previous ***,a favorable relationship is ascertained between the aging treatment and mechanical properties such as compression strength and plateau strength.

关键词： die casting porous materials metal matrix sytanctic foams expanded clay compressive deformation