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Characteristics of Positive Ions in the Sheath Region of magnetized Collisional Electronegative Discharges

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Plasma Science and Technology 2014年第6期16卷 552-556页

作者： m.m.hatami A.R.NIKNAm Physics Department of K.N.Toosi University of Technology Laser-Plasma Research Institute of Shahid Beheshti University G.C.

A hydrodynamic model is used to investigate the characteristics of positive ions in the sheath region of a low-pressure magnetized electronegative discharge. Positive ions are modeled as a cold fluid, while the electron and negative ion density distributions obey the Boltzmann distribution with two different temperatures. By taking into account the ion-neutral collision effect in the sheath region and assuming that the momentum transfer cross section has a power law dependence on the velocity of positive ions, the sheath formation criterion （modified Bohm＇s criterion） is derived and it is shown that there are specified maximum and minimum limits for the ion mach number m. Considering these two limits of m, the behaviors of electrostatic potential, charged particle density distributions and positive ion velocities in the sheath region are studied for different values of ion-neutral collision frequency.

关键词： electronegative plasma hydrodynamic model magnetized plasma sheath,Bohm's criterion

Effect of Ion Concentrations on the Characteristics of a multi-Component magnetized Plasma Sheath

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Plasma Science and Technology 2009年第6期11卷 642-646页

作者： m.m.hatami B.SHOKRI Laser-Plasma Research Institute of Shahid Beheshti University G.C.EvinTehranIran Physical Department and Laser-Plasma Research Institute of Shahid Beheshti University G.C.EvinTehranIran

A hydrodynamic approach is used to investigate a three-component magnetized plasma sheath which consists of electrons and two species of positive ions. Assuming a phase space of one-dimensional spatial coordinate system and three-dimensional velocity coordinate system, the effect of different concentrations of positive ion species on some characteristics of the plasma sheath such as the velocity and density distribution of positive ion species and the electrostatic potential of this region is investigated. The calculated results show that the increase in the density ratio of positive ion species causes a decrease in both the ion velocities and the electrostatic potential of the sheath region. Also, it is shown that in the sheath region of a magnetized plasma consisting of only one positive ion species the bumps of the net density of charged particles disappears much faster. In addition, three-dimensional velocity of each positive ion species in the sheath region is plotted for different concentrations of positive ion species.

关键词： magnetized plasma plasma and electropositive plasma sheath hydrodynamic equations multi-component sheath

Protective effects of cyclosporine and its analog NIm-811 in a murine model of hepatic ischemia-reperfusion injury

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Liver Research 2024年第1期8卷 46-53页

作者： Joshua Hefler Rena Pawlick Braulio A.marfil-Garza Aducio Thiesen Nerea Cuesta-Gomez Sanaz hatami Darren H.Freed Constantine Karvellas David L.Bigam A.m.James Shapiro Department of Surgery Faculty of Medicine&DentistryUniversity of AlbertaEdmontonABCanada Department of medicine Faculty of Medicine&DentistryUniversity of AlbertaEdmontonABCanada CHRISTUS-LatAm Hub Excellence&Innovation Center MonterreyMexico Alberta Diabetes Institute University of AlbertaEdmontonABCanada Clinical Islet Transplant Program University of AlbertaEdmontonABCanada Department of Laboratory medicine&Pathology Faculty of Medicine&DentistryUniversity of AlbertaEdmontonABCanada

Background and aim:The liver is susceptible to ischemia-reperfusion injury(IRI)during hepatic surgery,when the vessels are compressed to control bleeding,or liver transplantation,when there is an obligate period of *** hallmark of IRI comprises mitochondrial dysfunction,which generates reactive oxygen species,and cell death through necrosis or ***(CsA),which is a well-known immunosuppressive agent that inhibits calcineurin,has the additional effect of inhibiting the mito-chondrial permeability transition pore(mPTP),thereby,preventing mitochondrial swelling and ***-811,which is the nonimmunosuppressive analog of CsA,has a similar effect on the *** this study,we tested the effect of both agents on mitigating warm hepatic IRI in a murine *** and methods:Before ischemic insult,the mice were administered with intraperitoneal normal saline(control);CsA at 2.5,10,or 25 mg/kg;or NIm-811 at 10 mg/***,the mice were subjected to partial warm hepatic ischemia by selective pedicle clamping for 60 min,followed by 6 h of recovery after *** alanine transaminase(ALT)was measured,and the liver tissue was examined histologically for the presence of apoptosis and the levels of inflammatory ***:Compared with the control mice,the mice treated with 10 and 25 mg/kg of CsA and NIm-811 had significantly lower ALT levels(Pmoreover,the liver tissue showed reduced histological injury scores after treatment with CsA at 2.5,10,and 25 mg/kg and NIm-811(P=0.041,ment with CsA at all doses(P=0.012,0.007,andmmatory cyto-kines,particularly interleukin(IL)-1β,IL-2,IL-4,IL-10,and keratinocyte chemoattractant/human growth-regulated oncogene significantly decreased in the mice treated with the highest dose of CsA(25 mg/kg)than those in the control ***

关键词： Cyclosporine(CsA) Cyclosporine analogue Liver surgery Ischemia-reperfusion injury(IRI) Animal model NIm-811

motion of a spherical particle in a fluid forced vortex by DQm and DTm

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Particuology 2014年第5期12卷 206-212页

作者： m.hatami D.D.Ganji Esfarayen University Department of Mechanical EngineeringEsfarayenNorth KhorasanIran mechanical Engineering Faculty Babol University of TechnologyBabolP.O.Box 484Iran

In this study, coupled equations of the motion of a particle in a fluid forced vortex were investigated using the differential transformation method （DTm） with the Pad6 approximation and the differential quadrature method （DO_m）. The significant contribution of the work is the introduction of two new, fast and efficient solutions for a spherical particle in a forced vortex that are improvements over the previous numerical results in the literature. These methods represent approximations with a high degree of accuracy and minimal computational effort for studying the particle motion in a fluid forced vortex. In addition, the velocity profiles （angular and radial） and the position trajectory of a particle in a fluid forced vortex are described in the current study.

关键词： Spherical particle Forced vortex Differential transformation method (DTm)Angular velocity Differential quadrature method (DQm)

Quantum phase distribution and the number-phase Wigner function of the generalized squeezed vacuum states associated with solvable quantum systems

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Chinese Physics B 2012年第5期21卷 265-273页

作者： G.R.Honarasa m.K.Tavassoly m.hatami Department of Physics Faculty of ScienceShiraz University of Technology Atomic and molecular Group Faculty of PhysicsYazd University

The quantum phase properties of the generalized squeezed vacuum states associated with solvable quantum systems are studied by using the Pegg-Barnett ***,two nonclassical features,i.e.,squeezing in the number and phase operators,as well as the number-phase Wigner function of the generalized squeezed states are *** to some actual physical situations,the present approach is applied to two classes of generalized squeezed states：solvable quantum systems with discrete spectra and nonlinear squeezed states with particular nonlinear ***,the time evolution of the nonclassical properties of the considered systems has been numerically investigated.

关键词： squeezed vacuum states solvable quantum systems phase distribution number phaseWigner function

Exact Solutions of the Dirac Equation for an Electron in a magnetic Field with Shape Invariant method

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Chinese Physics Letters 2008年第11期25卷 3848-3851页

作者： m. R. Setare O. hatami Department of Science University of Kurdistan Pasdaran Ave. Sanandaj Iran

Based on the shape invariance property we obtain exact solutions oI the Dirac equation for an electron moving in the presence of a certain varying magnetic field, then we also show its non-relativistic limit.

关键词： the power-law exponents precipitation durative abrupt precipitation change

Exact Solution of Klein-Gordon Equation for Charged Particle in magnetic Field with Shape Invariant method

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Communications in Theoretical Physics 2009年第6期51卷 1000-1002页

作者： m.R. Setare O. hatami Department of Science University of Kurdistan Pasdaran Ave. Sanandaj Iran

Based on the shape invariance property we obtain exact solutions of the three-dimensional relativistic Klein Gordon equation for a charged particle moving in the presence of a certain varying magnetic field, and we al... 详细信息

关键词： Klein Gordon equation shape invariance supersymmetric quantum mechanics exact solutions magnetic field

Analysis of turbulent mHD Couette nanofluid flow and heat transfer using hybrid DTm-FDm

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Particuology 2016年第3期14卷 95-101页

作者： S. mosayebidorcheh m. Sheikholeslami m. hatami D.D. Ganji Young Researchers and Elite Club Najafabad Branch lslamicAzad University Ndjafabad Iran Department of mechanical Engineering Lenjan Branch Islamic Azad University lsfahan Iron Department of mechanical Engineering Babol University of Technology Babol Iran mechanical Engineering Department Engineering and Technical College Esfarayen University Esfarayen North Khorasan lran

Unsteady turbulent magnetohydrodynamic nanofluid hydrothermal treatment is studied. The zero- equation turbulence model is used to simulate turbulent flow. The modeling results obtained by applying the hybrid differential transformation method-finite difference method to solve this problem confirm its viability. An analytical procedure is used for finding the effects of the problem parameters. Results indicate that the average Nusselt number over the lower plate depends linearly on volume fraction of nanofluid, Hall parameter, turbulent Eckert number, and Reynolds number whereas it is inversely proportional on the Hartmann number and the turbulent parameter.

关键词： Turbulent Hall effect Hybrid DTm-FDm Nanofluid magnetohydrodynarnic couette flow

Quantum Squeezing of Dark Solitons in Optical Fibers

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Communications in Theoretical Physics 2011年第8期56卷 322-326页

作者： G.R.Honarasa m.hatami m.K.Tavassoly Atomic and molecular Group Faculty of PhysicsYazd University Physics Group Faculty of ScienceShiraz University of Technology

The quantum theory of dark soliton propagation in fibers is studied based on the linearization approximation. Then the uncertainties in photon number, phase, position （time） and momentum of quantized dark solitons are calculated. Finally, the squeezing of the dark soliton is investigated by using homodyne detection and compared with bright soliton case.

关键词： squeezing dark soliton quantum nonlinear Schrodinger equation quantum fluctuation