نتایج جستجو برای: electronic coupling constant

تعداد نتایج: 569469  

2013
Bernard Sonnenschein Francesc Sagués Lutz Schimansky-Geier

We investigate how correlations between the diversity of the connectivity of networks and the dynamics at their nodes affect the macroscopic behavior. In particular, we study the synchronization transition of coupled stochastic phase oscillators that represent the node dynamics. Crucially in our work, the variability in the number of connections of the nodes is correlated with the width of the ...

2005

The resolution required for the spectrometer is at least 100 nm. The only BPM type proved to have a resolution better than 100 nm is a microwave cavity BPM [1]. The supression of the undesired symmetric cavity modes with coupling slots is also well established [2], [3]. This means a substantial improvement in the stability and the accuracy of the beam position measurement vs. a standard techniq...

2005
Siavash Pourkamali Farrokh Ayazi

This paper, the second of two parts, introduces electrostatic coupling of micromechanical resonators for implementation of high-order narrow-bandwidth bandpass filters. The concept of electrostatic coupling of closely spaced microresonators and its electromechanical modeling is presented. Electrostatic coupling of resonators does not require any distinct physical coupling elements. The electros...

2002
ANDREAS M HINZ Andreas M Hinz

Since it became clear that the band structure of the spectrum of periodic Sturm–Liouville operators t = − (d/dr2) + q(r) does not survive a spherically symmetric extension to Schrödinger operators T = −1+V with V (x) = q(|x|) for x ∈ R , d ∈ N\ {1}, a wealth of detailed information about the spectrum of such operators has been acquired. The observation of eigenvalues embedded in the essential s...

2011
Marjan A. Rafiee

In this work, the calculated nuclear quadrupole coupling constants of O in some styrylquinoline conformers were presented. The calculations were carried out to find the relationships between the charge distribution of styrylquinolines and their pharmaceutical behavior and to explore the differences among the electronic structures of some conformers of these potent HIV IN inhibitors. Furthermore...

1999
Eliseo Ruiz Joan Cano Santiago Alvarez Pere Alemany Michel Verdaguer

A theoretical density-functional study has been carried out to analyze the exchange coupling in the chains of CuGeO3 using discrete models. The results show a good agreement with the experimental exchange coupling constant ~J! together with a strong dependence of J with the Cu-O-Cu angle. The calculation of the J values for a distorted model indicates a larger degree of dimerization than those ...

1996
Michael Schmelling

The current status of measurements of the strong coupling constant from different reactions is reviewed. Including new results presented at the 1996 ICHEP conference, a global average αs(MZ) = 0.118± 0.003 is obtained. Plenary talk given at the XXVIII International Conference on High Energy Physics Warsaw, July 25–31, 1996.

2006
Alex G. Dias J. C. Montero

We show that in 3-3-1 models there exist a natural relation among the SU(3)L coupling constant g, the electroweak mixing angle θW , the mass of the W , and one of the vacuum expectation values, which implies that those models can be realized at low energy scales and, in particular, even at the electroweak scale. So that, being that symmetries realized in Nature, new physics may be really just a...

1994
B R Webber

The current status of the QCD coupling constant S and experimental and theoretical studies of hadronic jets are reviewed.

2000
YASUHIRO OKADA

SUSY effects on various flavor changing neutral current processes are discussed in the minimal supergravity model and the SU(5) grand unified theory with righthanded neutrino supermultiplets. In particular, in the latter case the neutrino Yukawa coupling constants can be a source of the flavor mixing in the right-handeddown-type-squark sector. It is shown that due to this mixing the time-depend...

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