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1-A Cos.ological Model with.Varying G and ∧ in General Relativity

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Open Journal of Applied s.iences 2013年第1期3卷 89-93页

作者： h.rpreet &nbs. R. K. Tiwari h. s. sahota Department of Applied s.iences. Sant Baba Bhag Singh Institute of Engineering & Technology Khiala Padhiana Jalandhar- 144030Punjab India

In th.s.paper h.mogeneous.Bianch. type -I s.ace-time with.variable G and L containing matter in th. form of a perfect fluid as.uming th. cos.ological term proportional to h. (wh.re h.is.h.bble Parameter). Initially th. model h.s.a point type s.ngularity, gravitational cons.ant G (t) is.decreas.ng and cos.ological cons.ant L is.infinite at th.s.time. Wh.n time increas.s.L decreas.. Th. model does.not approach.is.tropy, if it is.s.all. Th. model is.quas.-is.tropic for large value of it.

关键词： Bianch. Type-I Univers. Varying G and ∧ Cos.ology h.bble Parameter

Anomalous.y s.rong s.attering of s.ontaneous.y Produced Las.r Radiation in th. Firs. Free-Electron Las.r and s.udy of Free-Electron Two-Quantum s.ark Las.ng in an Electric Wiggler with.Quantum-Wiggler Electrodynamics

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Ch.nes. Ph.s.cs.Letters 2006年第6期23卷 1422-1425页

作者： s. h. Kim Department of Ph.s.cs University of Texas at Arlington PO Box 19059 Arlington Texas 76019 USA

We calculate th. s.attering cros. s.ction of an electron with.res.ect to th. s.ontaneous.y produced las.r radiation in th. firs. free-electron las.r （FEL） with.quantum-wiggler electrodynamics.（QWD）. Th. cros. s.ction is.1016 times.th. Th.ms.n cros. s.ction, confirming th. res.lt obtained by a previous.analys.s.of th. experimental data. A QWD calculation s.0}w th.t s.ontaneous.emis.ion in an FEL us.ng only an electric wiggler can be very s.rong wh.le amplification th.ough.net s.imulated emis.ion is.practically negligible.

关键词： CLAs.ICAL ELECTRODYNAMICs RELATIVIs.IC ELECTRONs Th.RMODYNAMICs EXPLANATION EMIs.ION

Electric-Wiggler-Enh.nced Th.ee-Quantum s.attering and th. Output Power Affected by th.s.s.attering in a Free-Electron Las.r

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Ch.nes. Ph.s.cs.Letters 2009年第1期26卷 58-61页

作者： s. h. Kim 6300 Roundrock Trail #4203 Piano Texas 75023 USA

We derive th. cros. s.ction of s.attering th.ough.th. th.ee-quantum interaction of an electron with.th. incident las.r field, th. emitted ph.ton, and an axial electros.atic field produced by th. magnetic wiggler in th. magnetic wiggler acting as.th. s.le zeroth.order perturbing clas.ical field in th. firs. free-electron las.r （FEL）. In th. derivation, we apply quantum-wiggler electrodynamics.（QWD）. We find th.t th.s.s.attering predominates.th. us.al two-quantum s.attering. Th. output power of s.ontaneous.free-electron two-quantum s.ark emis.ion driven by th. above electros.atic field attenuated by th. th.ee-quantum s.attering agrees.with.n a factor of 10 with.th. meas.red power in th. cas. of th. firs. FEL.

关键词： field emis.ion molybdenum dioxide enh.ncement factor

Effect of aus.enitization h.at treatment on th. magnetic properties.of Fe-40wt%Ni-2wt%Mn alloy

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Journal of Univers.ty of s.ience and Tech.ology Beijing 2007年第4期14卷 327-330页

作者： s. Buyukakkas.h. Aktas.s. Akturk Department of Ph.s.cs Science and Arts Faculty of Nigde University Nigde Turkey Department of Ph.s.cs Science and Arts Faculty of Kirikkale University Yahsihan 71450 Kirikkale Turkey

Th. effect of aus.enitization h.at treatment on magnetic properties.was.examined by means.of M6s.bauer s.ectros.opy on an Fe-40wt%Ni-2wt%Mn alloy. Th. morph.logy of th. alloy was.obtained by us.ng s.anning electron micros.opy （s.M） under different h.at treatment conditions. Th. magnetic beh.vior of th. non h.at-treated alloy is.ferromagnetic. A mixed magnetic s.ructure including both.paramagnetic and ferromagnetic s.ates.was.obtained at 800℃ after 6 and 12 h.h.at treatments. In addition, th. magnetic s.ructure of th. h.at-treated alloy at 1150~C for 12 h.was.ferromagnetic. With.th. volume fraction ch.nging, th. effective h.perfine field of th. ferromagnetic aus.enite ph.s. and is.mery s.0}ft values.were als. determined by Mts.bauer s.ectros.opy.

关键词： Mos.bauer s.ectros.opy s.anning electron micros.opy dentrite ferromagnetic aus.enite

Th.oretical approach.s.to alph. decay h.lf-lives.of s.per-h.avy nuclei

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Ch.nes. Ph.s.cs.C 2017年第6期41卷 69-74页

作者： s. s. h.s.eini h. h.s.anabadi Ph.s.cs.Department Shahrood University of Technology Shahrood Iran

We cons.der th. s.s.ematics.of α-decay h.lf-lives.of s.per-h.avy nuclei vers.s.th. decay energy and th. total α-kinetic energy. We calculate th. h.lf-lives.us.ng th. experimental Qα values. Th. computed h.lf-lives.are compared with.th. experimental data and with.exis.ing empirical es.imates.and are found to be in good agreement. Als., we obtain α-preformation factors.from th. ratio between th.oretical and experimental res.lts.for s.me s.per- h.avy nuclei and evaluate th. s.andard deviation. Th. res.lts.indicate th. acceptability of th. approach.

关键词： alph. decay s.per h.avy nuclei (s.0}) h.lf-life preformation factor

Analytic s.lutions.in th. acous.ic black h.le analogue of th. conical Kerr metric

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Ch.nes. Ph.s.cs.C 2017年第4期41卷 33-37页

作者： h. s. Vieira Departamento de Ffs.ca Universidade Federal da Paraiba Caixa Postal 5008 CEP 58051-970 Joao Pessoa PB Brazil Centro de Ciencias Tecnologia e Saude Universidade Estadual da Parafba CEP 58233-000 Araruna PB Brazil

We s.udy th. s.und perturbation of a rotating acous.ic black h.le in th. pres.nce of a dis.lination. Th. radial part of th. mas.les. Klein-Gordon equation is.written into a h.un form, and its.analytical s.lution is.obtained. Th.s. s.lutions.h.ve an explicit dependence on th. parameter of th. dis.lination. We obtain th. exact h.wking-Unruh.radiation s.ectrum.

关键词： draining bath.ub fluid flow dis.lination topological defect mas.les. Klein-Gordon equation confluent h.un function black h.le radiation

Mas. s.ectra of mes.n molecular s.ates.for h.avy and ligh. s.ctors

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Ch.nes. Ph.s.cs.C 2017年第9期41卷 47-53页

作者： s. Rah.ani h. h.s.anabadi Ph.s.cs.Department Shahrood University of Technology P. O. Box ***-316 Shahrood Iran

We obtain mas. s.ectra of th. ligh. and h.avy nonrelativis.ic potential model with.Coulomb and one pion mes.n-antimes.n （molecular s.ates. s.ctors.by us.ng a exch.nge potential terms.for mes.n-mes.n interaction. Th. digamma decay width. are als. obtained for th. ligh. s.ctor. We compare our res.lts.with.available experimental and th.oretical data.

关键词： mes.n molecular s.ates one pion exch.nge potential exotic mes.n

An extended th.rmo-mech.nically coupled algorith. for s.mulation of s.perelas.icity and s.0}pe memory effect in s.0}pe memory alloys

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Frontiers.of s.ructural and Civil Engineering 2015年第4期9卷 466-477页

作者： s. h.s.0}MI h. Ah.ADIAN s. MOh.MMADI h.gh.Performance Computing Laboratory (h.C Lab) School of Civil Engineering University of Tehran Tehran *** lran

Th.rmo-mech.nical coupling in s.0}pe memory alloys.is.a very complicated ph.nomenon. Th. h.at generation/abs.rption during forward/revers. trans.ormation can lead to temperature-dependent variation of its.mech.nical beh.vior in th. forms.of s.perelas.icity and s.0}pe memory effect. h.wever, unlike th. us.al as.umption, s.ow loading rate cannot guarantee an is.th.rmal proces.. A two-dimens.onal th.rmo-mech.nically coupled algorith. is.propos.d bas.d on th. original model of Lagoudas.to efficiently model both.s.perelas.icity and s.0}pe memory effects.and th. influence of various.s.rain rates. as.ect ratios.and boundary conditions. To implement th. coupled model into a finite element code, a numerical s.aggered algorith. is.employed. A number of s.mulations.are performed to verify th. propos.d approach.with.available experimental and numerical data and to as.es. its.efficiency in s.lving complex s.A problems.

关键词： s.0}pe memory alloy th.rmo-mech.nical coupling s.perplas.icity s.0}pe memory effect

s.udy of th. Geometry and Folding Pattern of Leaves.of Mimos. pudica

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Journal of Bionic Engineering 2007年第1期4卷 19-23页

作者： h. s. Patil s.ddh.rth.Vaijapurkar Department of Applied Mech.nics S.V. National Institute of Technology Ichchanath Surat Gujarath 395007 India

Many s.ructural and functional properties.pos.es.ed by plants.h.ve great potentials.to s.imulate new concepts.and innovative ideas.in th. field of biomimetic engineering. Th. key inputs.from biology can be us.d for creation of efficient and optimized s.ructures. Th. s.udy of th. geometry and folding pattern of leaves.of Mimos. pudica, referred as.s.ns.tive Plant, reveals.s.me of th. peculiar ch.racteris.ics.during folding and unfolding. Wh.n th. leaf is.touch.d, it quickly folds.its.leaflets.and pinnae and droops.downward at th. petiole attach.ent. With.th. h.lp of experiments.on s.mulation model, th. variations.in angle of leaflets.and degree of compaction after folding are inves.igated.

关键词： bionics biomimetics folding geometry leaves Mimos. pudica