نتایج جستجو برای: classical model

تعداد نتایج: 2244865  

Journal: :international journal of nano dimension 0
j. e. jam composite materials and technology center, mut, tehran, iran. a. t. samaei composite materials and technology center, mut, tehran, iran.

in this paper, the modified euler-bernoulli beam model is presented to examine the influence of surface elasticity and residual surface tension on the critical force of axial buckling of nanotubes in the presence of rotary inertia. an explicit solution is derived for the buckling loads of microscaled euler beams considering surface effects. the size-dependent buckling behavior of the nanotube d...

2007
Y. L. Loh E. W. Carlson

Superconductors with low superfluid density are often dominated by phase fluctuations of the order parameter. In this regime, their physics may be described by XY models. The transition temperature Tc of such models is of the same order as the zero-temperature phase stiffness helicity modulus , a long-wavelength property of the system: Tc=A 0 . However, the constant A is a nonuniversal number, ...

2008
E. J. Mele G. V. Krishna S. C. Erwin

Competing magnetically ordered structures in polymerized orthorhombic AC 60 are studied. A mean-field theory for the equilibrium phases is developed using an Ising model and a classical Heisenberg model to describe the competition between inter-and intra-chain magnetic order in the solid. In the Ising model, the limiting commensurate one-dimensional and three-dimensional phases are separated by...

Journal: :Carnegie-Rochester Conference Series on Public Policy 1994

Journal: :Journal of High Energy Physics, Gravitation and Cosmology 2018

Journal: :Journal of Evolution Equations 2012

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