Results 31 to 40 of about 11,280,957 (315)

Effect of load sequence interaction on bond-wire lifetime due to power cycling

open access: yesScientific Reports, 2021
Experimental investigations on the effects of load sequence on degradations of bond-wire contacts of Insulated Gate Bipolar Transistors power modules are reported in this paper.
Zoubir Khatir   +4 more
doaj   +1 more source

The effect of residual stress on the nonsingular T-stresses

open access: yesFrattura ed Integrità Strutturale, 2017
The effect of residual stresses on surface fatigue crack propagation and fracture mechanics parameters of intersecting orthogonal cracks is discussed. Mutual influence of intersecting cracks and biaxiality affects the nonsingular parameters Txx and Tzz. At the same time, the effect on the stress intensity factor is negligible.
Chernyatin, A.S.   +2 more
openaire   +4 more sources

Stress, anxiété et dépression au travail : existe-t-il des différences entre entreprises ? [PDF]

open access: yes, 2011
En dépit du coût social très élevé du stress au travail, les déterminants des risques psycho-sociaux des salariés demeurent encore largement méconnus en France. Les études portant sur le stress professionnel sont généralement des études de cas, ce qui ne
Vaillant, Nicolas   +1 more
core   +1 more source

miR200-regulated CXCL12β promotes fibroblast heterogeneity and immunosuppression in ovarian cancers

open access: yesNature Communications, 2018
Cancer-associated fibroblasts (CAFs) are an important part of the tumor microenvironment. Here the authors characterize four subsets of CAFs across human samples of ovarian cancer subtypes and show in the mesenchymal subtype a specific CAF-S1 population ...
Anne-Marie Givel   +12 more
doaj   +1 more source

Study on the apoptosis mechanism induced by T-2 toxin. [PDF]

open access: yesPLoS ONE, 2013
T-2 toxin is known to induce apoptosis in mammalian cells. The mechanism of apoptosis induced by T-2 toxin has been proposed to be linked with oxidative stress and mitochondrial pathway.
Zhenhong Zhuang   +3 more
doaj   +1 more source

Chronic stress physically spares but functionally impairs innate-like invariant T cells

open access: yesCell Reports, 2021
Summary: The deleterious effects of psychological stress on mainstream T lymphocytes are well documented. However, how stress impacts innate-like T cells is unclear.
Patrick T. Rudak   +12 more
doaj   +1 more source

On the influence of T-Stress on photoelastic analysis under pure mode II loading [PDF]

open access: yes, 2008
According to the classical definition for in-plane modes of crack deformation, the constant stress term T exists only in the presence of mode I. However, recent studies show that this term can exist inmode II conditions as well, and significantly affect ...
Chiara Colombo   +3 more
core   +1 more source

Numerical calibration for fracture parameters of three-point bending semi-circular specimens

open access: yesFrontiers in Earth Science
This study aims to refine the fracture characterization of three-point bending semi-circular specimens used in rock fracture toughness assessments. The primary objective is to improve the accuracy of such evaluations by developing numerical simulations ...
Jun Wang   +6 more
doaj   +1 more source

Perceived Stress Among Students of Private and Public Sector Medical Colleges of Pakistan: A Cross Sectional Study

open access: yesEuropean Psychiatry, 2022
Introduction Medical-education is associated with high overall stress and it is important to identify relevant factors. Objectives The study was aimed to discern the differences in perceived stress among the students of public and private medical ...
M. Fatima   +9 more
doaj   +1 more source

Correlation of microseismic and chemical properties of brittle deformation in Locharbriggs sandstone [PDF]

open access: yes, 2003
The time-dependent properties of ceramic materials such as rocks depend both on preexisting cracks and chemical properties acting at their tips. We have examined the direct effect of chemical processes on the growth of a crack population by carrying out ...
Main, Ian G   +11 more
core   +1 more source

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