scholarly journals Time-scale effects on the gain-loss asymmetry in stock indices

2016 ◽  
Vol 94 (2) ◽  
Author(s):  
Bulcsú Sándor ◽  
Ingve Simonsen ◽  
Bálint Zsolt Nagy ◽  
Zoltán Néda
2008 ◽  
Vol 130 (2) ◽  
Author(s):  
Yoonchan Oh ◽  
C. Steve Suh ◽  
Hung-Jue Sue

The physics explored in this investigation enables short-time scale dynamic phenomenon to be correlated with package failure modes such as solder ball cracking and interlayer debond. It is found that although epoxy-based underfills with nanofillers are shown to be effective in alleviating thermal stresses and improving solder joint fatigue performance in thermal cycling tests of long-time scale, underfill material viscoelasticity is ineffective in attenuating short-time scale propagating shock waves. In addition, the inclusion of Cu interconnecting layers in flip chip area arrays is found to perform significantly better than Al layers in suppressing short-time scale effects. Results reported herein suggest that, if improved flip chip reliability is to be achieved, the compositions of all packaging constituent materials need be formulated to have well-defined short-time scale and long-time scale properties. Chip level circuit design layout also needs be optimized to either discourage or negate short-time wave propagation. The knowledge base established is generally applicable to high performance package configurations of small footprint and high clock speed. The approach along with the numerical procedures developed for the investigation can be a practical tool for realizing better device reliability and thus high manufacturing yield.


1976 ◽  
Vol 13 (03) ◽  
pp. 301-308
Author(s):  
John S. Letcher

A linearized model is developed for the motions of a vessel steered by a windvane servomechanism. By neglect of several fast-time-scale effects, and assumption of linear hydrodynamics and mechanism, a second-order linear equation governing slow oscillations is derived, System dynamic stability is found to depend on certain vessel hydrodynamic coefficients, operating conditions, geometry, proportions and linkage ratios of the control system; this dependance is explored for several different vane and control combinations.


2001 ◽  
Vol 49 (20) ◽  
pp. 4363-4374 ◽  
Author(s):  
M.F. Horstemeyer ◽  
M.I. Baskes ◽  
S.J. Plimpton

2004 ◽  
Vol 14 (11) ◽  
pp. 1657-1681 ◽  
Author(s):  
LOBNA DERBEL

This paper deals with the competition between the immune system and an agressive host such as tumor. We are particularly interested in the asymptotic behavior of the system when the time goes to infinity: we prove that this competition will absolutely finish either by the suppression of the harmful substances or by the inhibition of the immune system. The model which we introduce is suitable to describe the disease evolution for a long time scale, because it takes the capacity of the body to repair cells damage into account: body cells produce new cells to replace dead ones. We also examine the evolution of the solutions if we assume that the immune system has a normal healthy state that it always tries to reach.


2004 ◽  
Vol 26 (5-6) ◽  
pp. 598-608 ◽  
Author(s):  
Y. Lawrence Yao ◽  
Hongqiang Chen ◽  
Wenwu Zhang

2020 ◽  
Vol 35 (12) ◽  
pp. 2745-2757
Author(s):  
Nancy Gamboa-Badilla ◽  
Alfonso Segura ◽  
Guillem Bagaria ◽  
Corina Basnou ◽  
Joan Pino

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