نتایج جستجو برای: linear momentum

تعداد نتایج: 530725  

Journal: :Physical review 2022

We address the problem of determining physically correct definition momentum and angular densities in a spatially structured electromagnetic field, given that expressions are not same when one uses canonical energy-momentum tensor instead symmetric Belinfante electrodynamics. This has important consequences for interaction matter with light, example, twisted photons, would give drastically diff...

Journal: :American Journal of Physics and Applications 2015

AR. Haghighi, M. Kiyasatfar N. Aliashrafi

Blood flow is modeled as non-Newtonian micropolar fluid. The non-linear governing equations of continuum and momentum in the cylindrical coordinate are being discretized using a finite difference approach and have been solved iteratively ,through Crank-Nicolson method. The blood velocity distribution, volumetric flow rate and Resistance to blood flow at the stenosis throat are computed for vari...

Journal: :NeuroImage 2004
M Vaillant M I Miller L Younes A Trouvé

In this paper, we present a linear setting for statistical analysis of shape and an optimization approach based on a recent derivation of a conservation of momentum law for the geodesics of diffeomorphic flow. Once a template is fixed, the space of initial momentum becomes an appropriate space for studying shape via geodesic flow since the flow at any point along the geodesic is completely dete...

Journal: :پژوهش فیزیک ایران 0
محمود سلطان الکتابی m. soltanolkotabi احمد کیاستپور a. kiasatpour محمدحسین نادری m. h. naderi

single-valence electron atoms are an important class of atoms. their oscillator strengths are their important properties. knowing the oscillator strengths one can easity calculate the transition probabilities of the spectral lines and hence the lifetimes of energy levels of most atoms. the oscillator strengths of the spectral lines of most atoms are not knoen with sufficient accuracy due to the...

Journal: :Gait & posture 2002
Darcy S Reisman John P Scholz Gregor Schöner

The stability of linear and angular momentum of the center of mass (CM) and the underlying coordination of body segments was investigated for a sit-to-stand task to better understand how the nervous system organizes the redundant degrees of freedom available to accomplish this task. From the effector geometry, we derived a mathematical model relating body segment angles and their angular veloci...

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