Reflection of plane waves on the stress-free and rigid boundary surfaces of pre-stressed piezoelectric-orthotropic substrate: A comparative approach

2020 ◽  
pp. 1-12 ◽  
Author(s):  
Mukesh Kumar Pal ◽  
Abhishek Kumar Singh ◽  
Richa Kumari
Keyword(s):  
Plane Waves ◽  
Comparative Approach ◽  
Rigid Boundary ◽  
Boundary Surfaces

Slender streams

1979 ◽  
Vol 93 (1) ◽  
pp. 97-115 ◽  
Author(s):  
James Geer ◽  
Joseph B. Keller
Keyword(s):  
Channel Flow ◽  
Asymptotic Expansions ◽  
Slenderness Ratio ◽  
Channel Flows ◽  
Free Boundaries ◽  
Rigid Boundary ◽  
Wall Flows ◽  
Wall Flow ◽  
Boundary Surfaces

Flows of incompressible inviscid heavy fluids with free or rigid boundary surfaces are considered. For slender streams of fluid, the flow and the free boundaries are represented by a number of different asymptotic expansions in powers of the slenderness ratio. There are three kinds of outer expansions representing respectively jets, which have two free boundaries, wall flows, which have one free and one rigid boundary, and channel flows, which have two rigid boundaries. The flow at the junction of two or more outer flows is represented by an inner expansion. Previously we constructed the three outer expansions and the inner expansion at the junction of a wall flow and a jet (Keller & Geer 1973). Now we construct the inner expansions at the junctions of a channel flow and a jet, a channel flow and a wall flow, and a jet and the two wall flows into which it splits upon hitting a wall. We also match each inner expansion to the adjacent outer expansions. These seven expansions can be combined to solve many problems involving flows of slender streams.

Ab initio band theory approach to electron energy loss near edge structures

1988 ◽  
Vol 46 ◽  
pp. 506-507
Author(s):  
Xudong Weng ◽  
O.F. Sankey ◽  
Peter Rez
Keyword(s):  
Ab Initio ◽  
Local Density ◽  
Interpolation Method ◽  
Atomic Orbital ◽  
Plane Waves ◽  
Large Set ◽  
Theory Approach ◽  
Band Theory ◽  
Atomic Orbitals ◽  
Pseudopotential Calculations

Single electron band structure techniques have been applied successfully to the interpretation of the near edge structures of metals and other materials. Among various band theories, the linear combination of atomic orbital (LCAO) method is especially simple and interpretable. The commonly used empirical LCAO method is mainly an interpolation method, where the energies and wave functions of atomic orbitals are adjusted in order to fit experimental or more accurately determined electron states. To achieve better accuracy, the size of calculation has to be expanded, for example, to include excited states and more-distant-neighboring atoms. This tends to sacrifice the simplicity and interpretability of the method.In this paper. we adopt an ab initio scheme which incorporates the conceptual advantage of the LCAO method with the accuracy of ab initio pseudopotential calculations. The so called pscudo-atomic-orbitals (PAO's), computed from a free atom within the local-density approximation and the pseudopotential approximation, are used as the basis of expansion, replacing the usually very large set of plane waves in the conventional pseudopotential method. These PAO's however, do not consist of a rigorously complete set of orthonormal states.

Lectin-Induced RBC Agglutination: Chemical vs. Cryofixation

1980 ◽  
Vol 38 ◽  
pp. 664-665
Author(s):  
Dean A. Handley ◽  
Lanping A. Sung ◽  
Shu Chien
Keyword(s):  
Lectin Binding ◽  
Freeze Substitution ◽  
Electrostatic Charge ◽  
Geometric Parameters ◽  
Comparative Approach ◽  
Chemical Fixation ◽  
Cell Surfaces ◽  
Minimal Cell ◽  
Membrane Stiffness ◽  
Cell Contour

RBC agglutination by lectins represents an interactive balance between the attractive (bridging) force due to lectin binding on cell surfaces and disaggregating forces, such as membrane stiffness and electrostatic charge repulsion (1). During agglutination, critical geometric parameters of cell contour and intercellular distance reflect the magnitude of these interactive forces and the size of the bridging macromolecule (2). Valid ultrastructural measurements of these geometric parameters from agglutinated RBC's require preservation with minimal cell distortion. As chemical fixation may adversely influence RBC geometric properties (3), we used chemical fixation and cryofixation (rapid freezing followed by freeze-substitution) as a comparative approach to examine these parameters from RBC agglutinated with Ulex I lectin.

"The Word of St. Gregory": the beginning of a comparative approach to supernatural

1997 ◽  
pp. 40-43
Author(s):  
Natalia Fatyushyna
Keyword(s):  
Comparative Approach ◽  
Old Believers ◽  
Domestic Literature ◽  
12Th Century

In the domestic literature, the beginnings of comparative ideas about supernatural belong to the writing of Kievan Rus. The most meaningful such representation is presented by "The Word of St. Gregory, reproduced in the interpretation of how the first pagans, that is, the pagans, worshiped the idols and laid them down, as they now do." The basis of this monument of the Kyivan culture of the 12th century, also known as the "Word of the Idols," was the sermon of the prominent patriarch Gregory the Theologian on the Epiphany, in which he reacted negatively to ancient paganism. But "The Word," as Y. Anichkov noted, is not a preaching, nor a translation of the thoughts of Gregory the Theologian, but an attempt to study Old Believers: it gives an interpretation of the work of the Byzantine theologian "in the interpretation" of the local paganism.

Trust in Modern Russia (Comparative Approach to "Social Virtues")

2010 ◽  
pp. 83-102 ◽  
Author(s):  
M. Sasaki ◽  
Yu. Latov ◽  
G. Romashkina ◽  
V. Davidenko
Keyword(s):  
Social Capital ◽  
Empirical Data ◽  
Comparative Studies ◽  
Sociological Theory ◽  
Comparative Approach ◽  
Institutional Trust ◽  
Opinion Poll ◽  
World Values Survey ◽  
Medium Level ◽  
International Projects

This article offers economic and sociological theory of trust, embodying the idea of "social capital" by James Coleman. It also analyzes empirical data on personal and institutional trust obtained on the basis of nationwide opinion poll in the project "Comparative studies of trust in different countries during the period of globalization". The problem of trust is considered in the context of the international projects "World Values Survey" and "Trust Barometer" which made it possible to construct a mental world map of personal and institutional trust for various countries. It is shown that Russia has not a low, but a medium level of trust. In the mental world map some patterns were presented that reflect the basic trust as a form of social capital.

Migration and family change in Egypt: a comparative approach to social remittances

2013 ◽  
Vol 10 (1) ◽  
pp. 71-80 ◽  
Author(s):  
Lucile Gruntz ◽  
Delphine Pagès-El Karoui
Keyword(s):  
Public Discourse ◽  
Comparative Approach ◽  
Structural Factors ◽  
Host Countries ◽  
Return Policies ◽  
Social Remittances ◽  
Power Set ◽  
Gender Ideals ◽  
Gulf States ◽  
And Gender

Based on two ethnographical studies, our article explores social remittances from France and from the Gulf States, i.e. the way Egyptian migrants and returnees contribute to social change in their homeland with a focus on gender ideals and practices, as well as on the ways families cope with departure, absence and return. Policies in the home and host countries, public discourse, translocal networks, and individual locations within evolving structures of power, set the frame for an analysis of the consequences of migration in Egypt. This combination of structural factors is necessary to grasp the complex negotiations of family and gender norms, as asserted through idealized models, or enacted in daily practices in immigration and back home.

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