Atomic simulations of the dynamic properties of the30°partial dislocation in Si crystal

In RBL-2H3 rat basophilic leukemia cells, antigen binding to cell surface IgE-receptor complexes stimulates the release of inflammatory mediators and initiates a series of membrane and cytoskeletal events including a transformation of the cell surface from a microvillous to a lamellar topography. It is likely that dynamic properties of the IgE receptor contribute to the activation of these responses. Fewtrell and Metzger have established that limited crosslinking of IgE-receptor complexes is essential to trigger secretion. In addition, Baird and colleagues have reported that antigen binding causes a rapid immobilization of IgE-receptor complexes, and we have demonstrated an apparent increase with time in the affinity of IgE-receptor complexes for antigen.

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The relaxation of compressive biaxial strains in SOS via microtwins

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100155013 ◽

1989 ◽

Vol 47 ◽

pp. 608-609

Author(s):

M. E. Twigg ◽

E. D. Richmond ◽

J. G. Pellegrino

Keyword(s):

Thin Film ◽

Chemical Vapor Deposition ◽

Molecular Beam Epitaxy ◽

Compressive Stress ◽

Vapor Deposition ◽

Partial Dislocation ◽

Molecular Beam ◽

Volume Fraction ◽

Chemical Vapor ◽

Silicon Thin Film

For heteroepitaxial systems, such as silicon on sapphire (SOS), microtwins occur in significant numbers and are thought to contribute to strain relief in the silicon thin film. The size of this contribution can be assessed from TEM measurements, of the differential volume fraction of microtwins, dV/dν (the derivative of the microtwin volume V with respect to the film volume ν), for SOS grown by both chemical vapor deposition (CVD) and molecular beam epitaxy (MBE).In a (001) silicon thin film subjected to compressive stress along the [100] axis , this stress can be relieved by four twinning systems: a/6[211]/( lll), a/6(21l]/(l1l), a/6[21l] /( l1l), and a/6(2ll)/(1ll).3 For the a/6[211]/(1ll) system, the glide of a single a/6[2ll] twinning partial dislocation draws the two halves of the crystal, separated by the microtwin, closer together by a/3.

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Nucleosome dynamics

Biochemical Society Symposium ◽

10.1042/bss0730109 ◽

2006 ◽

Vol 73 ◽

pp. 109-119 ◽

Cited By ~ 2

Author(s):

Chris Stockdale ◽

Michael Bruno ◽

Helder Ferreira ◽

Elisa Garcia-Wilson ◽

Nicola Wiechens ◽

...

Keyword(s):

High Resolution ◽

Chromatin Structure ◽

Current Knowledge ◽

Dynamic Properties ◽

Structure And Dynamics ◽

Nucleosome Dynamics ◽

Sharp Focus ◽

Recent Advances ◽

Insight Into ◽

Chromatin Structure And Dynamics

In the 30 years since the discovery of the nucleosome, our picture of it has come into sharp focus. The recent high-resolution structures have provided a wealth of insight into the function of the nucleosome, but they are inherently static. Our current knowledge of how nucleosomes can be reconfigured dynamically is at a much earlier stage. Here, recent advances in the understanding of chromatin structure and dynamics are highlighted. The ways in which different modes of nucleosome reconfiguration are likely to influence each other are discussed, and some of the factors likely to regulate the dynamic properties of nucleosomes are considered.

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Dynamic properties and microstructural behavior of pure iron below and above shock induced α↔ε phase transition

Journal de Physique IV (Proceedings) ◽

10.1051/jp4:2006134159 ◽

2006 ◽

Vol 134 ◽

pp. 1041-1045

Author(s):

C. Voltz ◽

F. Buy

Keyword(s):

Phase Transition ◽

Pure Iron ◽

Dynamic Properties ◽

Ε Phase ◽

Microstructural Behavior

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NMR-investigation of the dynamic properties of off-center Ag+ defects in RbCl

Le Journal de Physique Colloques ◽

10.1051/jphyscol:19806103 ◽

1980 ◽

Vol 41 (C6) ◽

pp. C6-404-C6-407 ◽

Cited By ~ 4

Author(s):

O. Kanert ◽

R. Küchler ◽

M. Mali

Keyword(s):

Dynamic Properties

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DYNAMIC PROPERTIES OF GRAIN BOUNDARIES

Le Journal de Physique Colloques ◽

10.1051/jphyscol:1990160 ◽

1990 ◽

Vol 51 (C1) ◽

pp. C1-381-C1-390 ◽

Cited By ~ 1

Author(s):

M. FRIESEL ◽

I. MANNA ◽

W. GUST

Keyword(s):

Grain Boundaries ◽

Dynamic Properties

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Stability and dynamic properties of octocoral communities in the Tropical Eastern Pacific

Marine Ecology Progress Series ◽

10.3354/meps12416 ◽

2018 ◽

Vol 588 ◽

pp. 71-84 ◽

Cited By ~ 1

Author(s):

CG Gomez ◽

HM Guzman ◽

A Gonzalez

Keyword(s):

Dynamic Properties ◽

Eastern Pacific ◽

Tropical Eastern Pacific

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KINEMATIC FEATURES OF THE LAPPING PROCESS AND DETERMINATION OF ITS BASIC PARAMETERS

Computational nanotechnology ◽

10.33693/2313-223x-2020-7-3-23-28 ◽

2020 ◽

Vol 7 (3) ◽

pp. 23-28

Author(s):

EZIZ SARVAN SHIRVAN ◽

Keyword(s):

Dynamic Properties ◽

Cutting Speed ◽

Equilibrium System ◽

Technological Parameters ◽

Kinematic Characteristics ◽

Angular Velocities ◽

Basic Parameters ◽

Grinding Tool ◽

Mathematical Relationships ◽

Analytical Expressions

This paper discusses the kinematic characteristics of lapping process and the main parameters of the process. It was determined that the influencing degree of technological parameters to the forming surface and processes. It was projected the construction of the lapping head for processing of internal cylindrical surfaces, scheme of the lapping operation and graphic description of the forces influencing. The relationships between the axial, radial and tangential cutting forces and the effect of the combined force thereof are determined in order to ensure the necessary surface pressure. During the analysis geometric and mathematical relationships were obtained. The extracted analytical expressions can be realized by further experimental researches and can be used in engineering calculations of technological parameters of processing by lapping. Angular velocity, friction force, linear velocity, also the length of the tactile curve and the radius of the part can be considered the main kinematic and dynamic parameters of the process that the formation of the surface, also the course of the process depends on these parameters. Depending on the kinematic parameters, the wear nature of the tool changes and this changes the linear and angular velocities, which have a significant impact on the accuracy, quality and productivity of processing. When examining the technological capabilities of the process, the nature of the movement between the part and the grinding tool, also changes in cutting speed are often considered as a main factor. Analytical expressions were obtained to determine the main parameters of the process, taking into account the kinematic characteristics of the friction process. These expressions can be used in engineering calculations and allow to determine the optimal values of the processing mode. In order to obtain the required micrometric surface cleanliness and measurement accuracy, correlation relationships were established between the main parameters of the process, equations of the equilibrium system of shear forces were compiled and analytical expressions were obtained based on the analysis of kinematic and dynamic properties of the system.

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