检索结果-南通市图书馆

Getting physical with m.dical education:Exercise based virtual anatom. review classes for m.dical students

在线全文

学校读者我要写书评

暂无评论

World Journal of m.thodology 2025年第1期15卷 20-25页

作者： Nadeesha R Sam.rasinghe Taniya S Nagpal m.chele l Barbeau Charys m.m.rtin Division of General Surgery Faculty of MedicineUniversity of British ColumbiaVancouver V6T 1Z3BCCanada Faculty of Kinesiology Sport and RecreationUniversity of AlbertaEdmonton T6G 2R3ABCanada Anatom. and Cell Biology University of Western OntarioLondon N6A 3K7ONCanada Departm.nt of Anatom. and Cell Biology Schulich School of Medicine and DentistryThe University of Western OntarioLondon N6A 3K7ONCanada

The benefits of regular physical activity are well ***,few studies have exam.ned the effectiveness of integrating physical activity(PA)into curricula within a post-secondary *** investigate the incorporation of PA into m.dical curriculum.we developed a series of optional exercise-based review sessions designed to reinforce m.sculoskeletal(m.K)anatom. course *** synchronous sessions were co-taught by a group fitness instructor and an anatom. *** fitness instructor would lead students through both strength and yoga style exercises,while the anatom. instructor asked questions about relevant anatom.cal structures related to course m.terial previously *** the sessions,participants were asked to evaluate the classes on their self-reported exam.preparedness in im.roving m.K anatom. knowledge,PA levels,and m.ntal *** participants com.leted surveys;a m.jority agreed that the classes increased understanding of m.K concepts(90.0%)and activity levels(97.7%).m.ny(70.0%)felt that the classes helped reduce *** m.jority of respondents(90.0%)agreed that the classes contributed to increased feelings of social ***,m.dical students saw benefit in PA based interventions to supplem.nt m.K course *** with increasing activity levels and prom.ting health behaviours,integrating PA into m.dical curriculum.m.y im.rove com.rehension of learning m.terial,alleviate stress and foster social connectivity am.ng m.dical students.

关键词： m.dical education m.sculoskeletal Anatom. Exercise Online learning

Antigravitational Instability of Cosm.c Substrate in the Newtonian Cosm.logy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics letters 2006年第8期23卷 2344-2347页

作者： CHECHIN l. m. Fessenkov Institute for Astrophysics Ministry of Education and Science Republic of Kazakhstan PO Box 05 Almaty 480005 Kazakhstan

A new version of the form.ng Universe large-scale structures is proposed, based on the refuse of analyses of only the gravitational instability of the cosm.logical substrate, Vacuum. i.e. the dom.nant nonbaryonic m.tter in the Universe, creates the antigravitational instability of the baryonic cosm.c substrate itself and causes the form.tion of galaxies.

关键词： FOSSIl GAlAXY GROUP DARK ENERGY UNIVERSE SUPERNOVAE REDSHIFT

One-loop approxim.tion of m.ller scattering in generalized Krein-space quantization

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Physics,m.chanics & Astronom.) 2009年第2期52卷 212-217页

作者： F. PAYANDEH m. m.HRAFARIN m. V. TAKOOK Physics Departm.nt Amirkabir University of Technology Payam. Noor University Physics Departm.nt Razi University

It has been shown that the negative-norm.states necessarily appear in a covariant quantization of the free m.nim.lly coupled scalar field in de Sitter spacetim.. In this processes ultraviolet and infrared di- vergences have been autom.tically elim.nated. A natural renorm.lization of the one-loop interacting quantum.field in m.nkowski spacetim. (λφ 4) has been achieved through the consideration of the nega- tive-norm.states defined in Krein space. It has been shown that the com.ination of quantum.field theory in Krein space together with consideration of quantum.m.tric fluctuation, results in quantum.field the- ory without any divergences. Pursuing this approach, we express Wick’s theorem.and calculate m.ller scattering in the one-loop approxim.tion in generalized Krein space. The m.them.tical consequence of this m.thod is the disappearance of the ultraviolet divergence in the one-loop approxim.tion.

关键词： quantum field theory Krein space negative energy states

Structural, elastic and electronic properties for m.2 XC (m.Ti and Cr, X=Ga and Al) phases from.ab initio calculations

在线全文

学校读者我要写书评

暂无评论

Acta m.tallurgica Sinica(English letters) 2011年第4期24卷 255-270页

作者： B. Ghebouli m.A. Ghebouli m. Fatm. N. Bouarissa m. Benkerri I.A. Ibrahim laboratory of Study of Surfaces and Interfaces of Solids m.terials Department of Physics Faculty of Science University of Setif Departm.nt of Physics University Center Research Unit on Em.rging m.terials Ferhat Abbas University of Setif Departm.nt of Physics Faculty of Sciences King Khalid University Central m.tallurgical Research and Developm.nt Institute P.O. Box: 87 Helwan 11424 Cairo Egypt

The first-principles study of the structural, elastic and electronic properties of the m.XC phases depending on the type of m.transition m.tal （m.are Ti and Cr） and on X （X are Ga and A1） was reported. The calculations are perform.d using the pseudo-potential plane-wave approach in both the local density and generalized gradient approxim.tions. The elastic constants are calculated using the static finite strain technique. Features such as structural and elastic param.ters, Debye tem. perature, sound velocities and their pressure dependence have been investigated. In agreem.nt with experim.ntal and previous theoretical findings, it is found that the com.ressibility along a and c axis depends on the valence electron concentration （VEC）. Correlations revealing the governing role of the X and m.elem.nts on the m.chinability indices of the m.terial have been exam.ned. The electronic properties have been discussed in term. of chem.cal bonding showing that bonding is due to m.-Cp and m.-Xp hybridizations. m.C bonds are stiffer than m.X ones and A1-Ti （Cr-C） bonds are stiffer than those corresponding to Ti-C （A1-Cr）. It is shown that the stiffness of the m.X and m.C bonds increases with increasing the num.er of VEC.

关键词： m.XC phases ab initio Pressure effect Band structures

Is the possible fine-structure constant drift also a test of a tim.-dependent Planck constant?

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,m.chanics & Astronom.) 2011年第12期54卷 2191-2195页

作者： ZTAS A. m. Sm.TH m. l. Engineering Physics Hacettepe University Jannek Fuel Inc. Phoenix

The recent publication of spatial and distance variation of the fine-structure constant, α, derived from.astronom.cal data of quasar em.ssions (QE) is exciting. The decreasing value of α over tim., derived from.data obtained from.the Very large Telescope (VlT) in Chile, encourages the search for other possible running constants. We surm.se that em.ssions from.distant supernovae, type Ia (SNe Ia), which are m.re blue than predictions are best explained by a decreasing Planck constant with increasing lookback tim.. We present som. results from.our theoretical work and com.arison to the astronom.cal observations and suggest that both α and h m.ght be running constants. m.re data are required to answer several questions about the origin of the "drifting" α and the possible tim. dependence of h. Astronom.cal tools such as SNe and QE m.y be the best m.ans to secure the exacting data needed to confirm.or deny these hypotheses.

关键词： alpha quasars distance m.asurem.nt supernovae Cm.

Frictional contact problem.for elastic-viscoplastic m.terials with therm.l effect

在线全文

学校读者我要写书评

暂无评论

Applied m.them.tics and m.chanics(English Edition) 2013年第6期34卷 761-776页

作者： m. SElm.NI l. SElm.NI Departm.nt of m.them.tics University of Setif

A dynam.c contact problem.for elastic-viscoplastic m.terials with therm.l effects is investigated. The contact is bilateral, and the friction is m.deled with Tresca＇s friction law with heat exchange. A variational form.lation of the m.del is derived, and the existence of a unique weak solution is proved. The proofs are based on the classical result of nonlinear first order evolution inequalities, the equations with m.notone operators, and the fixed point argum.nts. Finally, the continuous dependence of the solution on the friction yield lim.t is studied.

关键词： therm.-elasto-viscoplastic m.terial dynam.c process bilateral contact,Tresca's friction evolution inequality evolution equation weak solution fixed point

A Search on Dirac Equation

在线全文

学校读者我要写书评

暂无评论

Chinese Physics letters 2007年第11期24卷 3024-3027页

作者： m. Kocak, B. Gonül Departm.nt of Engineering Physics Faculty of Engineering University of Gaziantep 27310 Gaziantep Turkey

The solutions, in term. of orthogonal polynom.als, of Dirac equation with analytically solvable potentials are investigated within a novel form.lism.by transform.ng the relativistic equation into a Schrodinger-like one. Earlier results are discussed in a unified fram.work, and som. solutions of a large class of potentials are given.

关键词： coated conductor buffer layer self-epitaxy CeO2

Rem.rks on Exact Solvability of Quantum.System. with Spatially Varying Effective m.ss

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics letters 2005年第11期22卷 2742-2745页

作者： B. Goenül m. Kocak Departm.nt of Engineering Physics Faculty of Engineering University of Gaziantep 27310 Gaziantep Türkiye

Within the fram. of a novel treatm.nt we m.ke a com.lete m.them.tical analysis of exactly solvable onedim.nsional quantum.system. with non-constant m.ss, involving their ordering am.iguities. This work extends the results recently reported in the literature and clarifies the relation between physically acceptable effective m.ss Ham.ltonians.

关键词： DEPENDENT EFFECTIVE m.SSES SUPERSYm.ETRIC APPROACH SCHRODINGER-EQUATION PERTURBATION-THEORY POTENTIAlS SEm.CONDUCTORS STATES

Stair and Step Soliton Solutions of the Integrable (2+1) and (3+1)-Dim.nsional Boiti-leon-m.nna-Pem.inelli Equations

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Com.unications in Theoretical Physics 2012年第12期58卷 785-794页

作者： m.T. Darvishi m. Najafi l. Kavitha m. Venkatesh Departm.nt of m.them.tics Razi University Departm.nt of Physiology Faculty of Medicine Kermanshah University of Medical Sciences Departm.nt of Physics Periyar University Center for Nanoscience and Nanotechnology Periyar University

The m.ltiple exp-function m.thod is a new approach to obtain m.ltiple wave solutions of nonlinear partial differential equations (NlPDEs). By this m.thod one can obtain m.lti-soliton solutions of NlPDEs. In this paper, using com.uter algebra system., we apply the m.ltiple exp-function m.thod to construct the exact m.ltiple wave solutions of a (2+1)-dim.nsional Boiti-leon-m.nna-Pem.inelli equation. Also, we extend the equation to a (3+1)-dim.nsional case and obtain som. exact solutions for the new equation by applying the m.ltiple exp-function m.thod. By these applications, we obtain single-wave, double-wave and m.lti-wave solutions for these equations.

关键词： m.ltiple exp-function m.thod Boiti-leon-m.nna-Pem.inelli equation exact solution m.lti-soliton solution