نتایج جستجو برای: elliptical fibers

تعداد نتایج: 80545  

Journal: :Archives of dermatology 2004
Leonard H Goldberg Murad Alam

BACKGROUND The elliptical (fusiform) excision is a basic tool of cutaneous surgery. OBJECTIVE To assess the design, functionality, ease of construction, and aesthetic outcomes of the ellipse. DESIGN A systematic review of elliptical designs and their site-specific benefits and limitations. In particular, we consider the (1). context of prevailing relaxed skin tension lines and tissue laxity...

Journal: :Optics letters 2008
Yuan Yao Lin Ray-Kuang Lee

Elliptical solitons in 2D nonlinear Schödinger equations are studied numerically with a more-generalized formulation. New families of solitons, vortices, and soliton rings with elliptical symmetry are found and investigated. With a suitable symmetry-breaking parameter, we show that perturbed elliptical solitons tend to move transversely owing to the existences of dipole excitation modes, which ...

M. T. Heydari,

It is shown that the result of Tso-Wu on the elliptical shape of the numerical range of quadratic operators holds also for the C*-algebra numerical range.

ژورنال: مهندسی دریا 2012
آتشی پور, سید رسول, اسحاقی, مهدی, حسینی هاشمی, شاهرخ, کریمی, محمود,

This paper deals with a free vibration analysis of functionally graded elliptical plates with different classical boundary conditions on the basis of polynomial-Ritz method and classical plate theory. The proposed admissible function is capable to obtain accurate natural frequencies of various classical boundary conditions namely, clamped, free and simply supported edges. The mechanical propert...

Shell and tube heat exchanger, singular baffles have been stimulated by means of the computational fluid dynamic technique and Fluent software. Several elliptical cross sections for the tubes are examined. So each model drawn by using Gambit software. In stimulating, 3D meshes is used for irregular Couper and tetrahedral networks. Also the performance of each of two shell and tube exchanger is ...

M.J Beigrezaee S.K Jalali,

In the present study, potential of finite element based molecular structural mechanics (MSM) for evaluating stress concentration factor of single-layered graphene sheets (SLGSs) with elliptical vacancies is successfully addressed. The MSM approach mimics the interatomic forces of the nanostructure by defining an equivalent frame structure containing beam elements. To obtain the mechanical and c...

1997
Stephen E. Zepf

The traditional view of elliptical galaxies has been that they formed in a single, rapid burst of star formation at high redshift, and have evolved quiescently since that time. In opposition to this traditional view is evidence that at least some elliptical galaxies have formed from the merger of two disk galaxies. What has not been clear is which process is the dominant formation mechanism for...

1998
Kenji Bekki

We perform numerical simulations of galaxy mergers between star-forming and gas-rich spirals in order to explore the origin of the Fundamental Plane (FP) of elliptical galaxies. We consider particularly that the origin of the slope of the FP is essentially due to the non-homology in structure and kinematics of elliptical galaxies and accordingly investigate structural and kinematical properties...

2011
Shu Ye Karen Daniels

This paper discusses an elliptical pad structure and its polygonal approximation. The elliptical pad is a part of via model structures, which are important and critical components on today’s multilayered Printed Circuit Board (PCB) and electrical packaging. To explore meshing characterization of the elliptical pad helps mesh generation over 3D structures for electromagnetic modeling (EM) and si...

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