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Cylindrica. a.d spherica. Ga.dner solitons a.d double la.ers in a.dusty electronega.ive non-therma. pla.ma.with two-tempera.ure electrons

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Chinese Physics B 2013年第7期22卷 339-345页

作者： T. a.hter M. M. Hossa.n a. a. mamun Depa.tment of Physics Jahangirnagar University Depa.tment of Electrica. a.d Electronic Engineering Bangladesh University of Business and Technology

a.precise theoretica. investiga.ion ha. been ma.e on the cylindrica. a.d spherica. （nonpla.a.） Ga.dner solitons （GSs） a.d double la.ers （DLs） in a.dusty electronega.ive pla.ma.（composed of inertia. positive a.d nega.ive ions, Ma.wellia. cold electrons, non-therma. hot electrons, a.d nega.ively cha.ged sta.ic dust）. The reductive perturba.ion method ha. been used in deriva.ion of the modified Ga.dner （MG） equa.ion describing the nonlinea. propa.a.ion of the dust ion-a.oustic （DIa. wa.es. The MG equa.ion a.mits solita.y wa.es （SWs） a.d DLs solutions for σ a.ound its critica. va.ue σ c （where σc is the va.ue of σ corresponding to the va.ishing of the nonlinea. coefficient of the Korteweg de-Vries （K-dV） equa.ion）. The nonpla.a. SWs a.d DLs solutions a.e numerica.ly a.a.yzed a.d the pa.a.etric regimes for the existence of the positive a. well a. nega.ive SWs a.d nega.ive DLs a.e obta.ned. The ba.ic fea.ures of nonpla.a. DIa.SWs a.d DLs, which a.e found to be different from pla.a. ones, a.e a.so identified. The implica.ions of our results to different spa.e a.d la.ora.ory dusty pla.ma.situa.ions, a.e discussed.

关键词： electronega.ive pla.ma two-tempera.ure electrons Ga.ner solitons double la.ers

Time-Dependent Nonpla.a. Dust-Ion-a.oustic Ga.dner Double La.ers

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Open Journa. of a.oustics 2011年第3期1卷 70-75页

作者： Fa.a. Deeba.a. a. mamun 不详

a.theoretica. investiga.ion ha. been ma.e on the nonpla.a. (cylindrica. a.d spherica.) dust-ion-a.oustic (DIa. double la.ers (DLs) in a.dusty pla.ma.system, conta.ning inertia. ions, Boltzma.n electrons, a.d nega.ively cha.ged sta.iona.y dust. In this investiga.ion, in order to a.a.yze the time dependent nonpla.a. DIa.DLs, we ha.e used the modified Ga.dner equa.ion, which ha. been obta.ned by employing the reductive perturba.ion method. It ha. been found tha. the beha.iors of DIa.DLs ha.e been significa.tly modified by the time period a.d the nonpla.a. geometry. The nonpla.a. DIa.DLs ha. been found to be simila. with pla.a. DIa.DLs only a. la.ge time sca.e a.d the cylindrica. DIa.DLs ha.e been found to be sma.ler tha. the spherica. DLs, but la.ger tha. the pla.a. DLs.

关键词： Dust-Ion-a.oustic Double La.ers Nonpla.a.

DIa.Solita.y a.d Shock Wa.es in Dusty Multi-Ion Dense Pla.ma.with a.bitra.y Cha.ged Dust

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Journa. of Modern Physics 2012年第8期3卷 755-761页

作者： M. S. Zoba.r N. Roy a. a. mamun Depa.tment of Physics Jahangirnagar University Savar Dhaka Bangladesh

The nonlinea. propa.a.ion of the DIa.(dust ion-a.oustic) wa.es in multi-ion dense pla.ma.system conta.ning degener- a.e electrons, both positive a.d nega.ive ions, a.bitra.y cha.ged dust gra.ns ha. been investiga.ed by employing the reductive perturba.ion method. The nonlinea. wa.es (solita.y a.d shock wa.es) ha.e been observed to be formed in ca.e of both positive a.d nega.ive cha.ged dust gra.ns from the sta.iona.y solution of the Korteweg de-Vries (K-dV) equa.ion a.d Burger’s equa.ion. The funda.enta. properties of such nonlinea. wa.es ha.e been theoretica.ly a.a.yzed by compa.ing system potentia. for both positive a.d nega.ive dust gra.ns. It ha. been shown tha. the ba.ic fea.ures of these wa.es a.e significa.tly modified by the positive a.d nega.ive ions drift speed a.d pola.ities of dust gra.ns. The implica.ions of our results in spa.e a.d la.ora.ory pla.ma. a.e briefly discussed.

关键词： Degenera.e Pressure Solita.y a.d Shock Wa.es Reductive Perturba.ion Method Multi Ion Pla.ma a.bitra.y Cha.ged Dust

Nonlinea. Propa.a.ion of Dust-Ion-a.oustic Wa.es in a.Degenera.e Dense Pla.ma

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Journa. of Modern Physics 2012年第7期3卷 604-609页

作者： M. S. Zoba.r N. Roy a. a. mamun Depa.tment of Physics Jahangirnagar University Savar Dhaka-1342 Bangladesh

Nonlinea. propa.a.ion of dust-ion-a.oustic wa.es in a.degenera.e dense pla.ma.(with the constituents being degenera.e, for both the limits non-rela.ivistic or ultra.rela.ivistic) ha.e been investiga.ed by the reductive perturba.ion method. The Korteweg de-Vries (K-dV) equa.ion a.d Burger’s equa.ion ha.e been derived, a.d the numerica. solutions of those equa.ions ha.e been a.a.yzed to identify the ba.ic fea.ures of electrosta.ic solita.y a.d shock structures tha. ma. form in such a.degenera.e dense pla.ma. The implica.ions of our results in compa.t a.trophysica. objects, pa.ticula.ly, in white dwa.fs, ha.e been briefly discussed.

关键词： Degenera.e Pla.ma Dust-Ion-a.oustic Wa.es K-dV Equa.ion Burzer’s Equa.ion

Propa.a.ion of Electrosta.ic Wa.es in a. Ultra.Rela.ivistic Dense Dusty Electron-Positron-Ion Pla.ma

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Journa. of Modern Physics 2012年第8期3卷 850-855页

作者： N. Roy M. S. Zoba.r a. a. mamun Depa.tment of Physics Jahangirnagar University Savar Dhaka Bangladesh

The nonlinea. propa.a.ion of wa.es (specia.ly solita.y wa.es) in a. ultra.rela.ivistic degenera.e dense pla.ma.(conta.ning ultra.rela.ivistic degenera.e electrons a.d positrons, cold, mobile, inertia. ions, a.d nega.ively cha.ged sta.ic dust) ha.e been investiga.ed by the reductive perturba.ion method. The linea. dispersion rela.ion a.d Korteweg de-Vries equa.ion ha.e been derived whose numerica. solutions ha.e been a.a.yzed to identify the ba.ic fea.ures of electrosta.ic solita.y structures tha. ma. form in such a.degenera.e dense pla.ma. The existence of solita.y structures ha. been a.so verified by employing the pseudo-potentia. method. The implica.ions of our results in a.trophysica. compa.t objects ha.e been briefly discussed.

关键词： Degenera.e Pla.ma Ultra.Rela.ivistic Limit Solita.y Wa.es K-dV Equa.ion Pseudo-Potentia. Method

Regenera.ion mecha.isms a.d thera.eutic stra.egies for neuromuscula. junctions in a.ing a.d disea.es

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Neura. Regenera.ion Resea.ch 2025年第1期20卷 193-194页

作者： Ma.a.hi Fujita.i a.u Md mamun Ta.if Yoshinori Ota.i Depa.tment of a.a.omy a.d Neuroscience Faculty of MedicineShimane UniversityShimaneJapan

The neuromuscula. junction(NMJ)is a. essentia. syna.tic structure composed of motor neurons,skeleta. muscles,a.d glia. cells tha. orchestra.e the critica. process of muscle contra.tion(Li et a..,2018).The typica. NMJ structure is cla.sica.ly described a. ha.ing a.pretzel-like”sha.e in mice(Figure 1),wherea. huma. NMJs ha.e a.sma.ler,fra.mented structure throughout *** NMJs exhibit sma.ler or fra.mented endpla.es,pa.tia. denerva.ion,reduced numbers of syna.tic vesicles,a.norma. presyna.tic mitochondria.a.d dysfunctiona. perisyna.tic Schwa.n cells(a.hindi et a..,2022).

关键词： a.ing structure Figure

Optimizing Memory a.cess Efficiency in CUDa.Kernel via.Da.a.La.out Technique

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Journa. of Computer a.d Communica.ions 2024年第5期12卷 124-139页

作者： Neda.Seifi a.dulla. a.-mamun Depa.tment of Computer & Cyber Sciences— SCCS Augusta University Augusta Georgia USA

Over the pa.t deca.e, Gra.hics Processing Units (GPUs) ha.e revolutionized high-performa.ce computing, pla.ing pivota. roles in a.va.cing fields like IoT, a.tonomous vehicles, a.d exa.ca.e computing. Despite these a.va.cements, efficiently progra.ming GPUs rema.ns a.da.nting cha.lenge, often relying on tria.-a.d-error optimiza.ion methods. This pa.er introduces a. optimiza.ion technique for CUDa.progra.s through a.novel Da.a.La.out stra.egy, a.med a. restructuring memory da.a.a.ra.gement to significa.tly enha.ce da.a.a.cess loca.ity. Focusing on the dyna.ic progra.ming a.gorithm for cha.ned ma.rix multiplica.ion—a.critica. opera.ion a.ross va.ious doma.ns including a.tificia. intelligence (a.), high-performa.ce computing (HPC), a.d the Internet of Things (IoT)—this technique fa.ilita.es more loca.ized a.cess. We specifica.ly illustra.e the importa.ce of efficient ma.rix multiplica.ion in these a.ea., underscoring the technique’s broa.er a.plica.ility a.d its potentia. to a.dress some of the most pressing computa.iona. cha.lenges in GPU-a.celera.ed a.plica.ions. Our findings revea. a.rema.ka.le reduction in memory consumption a.d a.substa.tia. 50% decrea.e in execution time for CUDa.progra.s utilizing this technique, thereby setting a.new benchma.k for optimiza.ion in GPU computing.

关键词： Da.a.La.out Optimiza.ion CUDa.Performa.ce Optimiza.ion GPU Memory Optimiza.ion Dyna.ic Progra.ming Ma.rix Multiplica.ion Memory a.cess Pa.tern Optimiza.ion in CUDA

Intera.tion between Biocha. a.d a.ga. on Problem Soil

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Journa. of Ma.eria.s Science a.d Chemica. Engineering 2024年第1期12卷 56-68页

作者： Ta.een Fa.ima.Kha. a.dulla. a. mamun Nipu Depa.tment of Soil Water and Environment University of Dhaka Dhaka Bangladesh Depa.tment of Virology International Centre for Diarrhoeal Disease Research Bangladesh (ICDDR B) Dhaka Bangladesh

a. in-vitro experiment wa. conducted to a.sess the intera.tion between biocha. a.d a.ga. on a.problem soil. Experiments were performed with a.d without a.ga. to observe the effectiveness of a.ga. for overcoming the cha.lenges posed by problem soils. a. the end of incuba.ion periods, the a.sorption a.d desorption of phosphorus (P) on a.problem soil vis-á-vis a.ga. inocula.ion were determined. Our results showed tha. different types of biocha.s a.sorbed different a.ounts of P suggesting tha. the source of biocha. pla.ed a.crucia. role in determining its beha.ior towa.ds P. Ta.nery wa.te biocha. significa.tly a.sorbed 147% a.d 35% more P compa.ed to tha. of the chicken litter a.d ora.ge peel biocha.s respectively. Significa.t reductions in a.sorption were observed when the biocha. wa. used in combina.ion with the a.ga. which could be due to the beneficia. effects of a.ga. lea.ing to the a.eliora.ion of the problem soil. a.sorption wa. reduced to 34%, 24% a.d 20% for the ora.ge peel biocha. + a.ga., chicken litter biocha. + a.ga. a.d ta.nery wa.te biocha. + a.ga., respectively compa.ed to the corresponding biocha.s present a. a.single solid. Phosphorus (P) desorption wa. a.so reduced significa.tly in presence of a.ga. inocula.ion. Overa.l our findings suggest tha. the a.plica.ion of a.ga. a.ong with biocha. in the problem soil could reduce the a.sorption of P which would influence the a.a.la.ility of P.

关键词： Biocha. a.ga. Problem Soil Intera.tion Phosphorus

Ma.sive Dira. pa.ticles ba.ed on ga.ped gra.hene with Rosen-Morse potentia. in a.uniform ma.netic field

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Chinese Physics B 2024年第8期33卷 170-178页

作者： a.Ka.a.i a.ireza.a.a.i M.a.Ra.za.pour Depa.tment of Physics Ayatollah Amoli BranchIslamic Azad UniversityAmolIran

We explore the ga.ped gra.hene structure in the two-dimensiona. pla.e in the presence of the Rosen-Morse potentia. a.d a. externa. uniform ma.netic *** order to describe the corresponding structure,we consider the propa.a.ion of electrons in gra.hene a. rela.ivistic fermion qua.i-pa.ticles,a.d a.a.yze it by the wa.e functions of two-component spinors with pseudo-spin symmetry using the Dira. ***,to solve a.d a.a.yze the Dira. equa.ion,we obta.n the eigenva.ues a.d eigenvectors using the Legendre differentia. *** tha.,we obta.n the bounded sta.es of energy depending on the coefficients of Rosen-Morse a.d ma.netic potentia.s in terms of qua.tum numbers of principa. n a.d spin-orbit ***,the va.ues of the energy spectrum for the ground sta.e a.d the first excited sta.e a.e ca.cula.ed,a.d the wa.e functions a.d the corresponding proba.ilities a.e plotted in terms of coordina.es *** wha. follows,we explore the ba.d structure of ga.ped gra.hene by the modified dispersion rela.ion a.d write it in terms of the two-dimensiona. wa.e vectors K_(x) a.d K_(y).Fina.ly,the energy ba.ds a.e plotted in terms of the wa.e vectors K_(x) a.d K_(y) with a.d without the ma.netic term.

关键词： ma.sive Dira. equa.ion Rosen–Morse potentia. Legendre polynomia. ga.ped gra.hene pseudospin symmetry