نتایج جستجو برای: shear enhancement

تعداد نتایج: 198523  

2008
VIKTOR SVERDLOV ENZO UNGERSBOECK HANS KOSINA

Conduction band modification due to shear stress is investigated. Mobility in singleand double-gate SOI FETs is modeled for Silicon thin body orientation (001) and (110) under general stress conditions. Decrease of conductivity mass induced by uniaxial [110] tensile stress leads to mobility enhancement in the stress direction in ultra-thin body SOI MOSFETs.

Journal: :Cell 2002
Wendy E. Thomas Elena Trintchina Manu Forero Viola Vogel Evgeni V. Sokurenko

Surface adhesion of bacteria generally occurs in the presence of shear stress, and the lifetime of receptor bonds is expected to be shortened in the presence of external force. However, by using Escherichia coli expressing the lectin-like adhesin FimH and guinea pig erythrocytes in flow chamber experiments, we show that bacterial attachment to target cells switches from loose to firm upon a 10-...

2005
J. Vanderhoeven K. Pappaert B. Dutta P. Vanhummelen G. V. Baron G. Desmet

Hybridization on microarray slides is a very slow process. The transport of target molecules towards the immobilized probe spots occurs solely by molecular diffusion and as a result, microarray analyses require overnight incubation and are highly inefficient in terms of capture rate and detection limit. To overcome this diffusion limitation, several solutions have already been reported: electro...

Journal: :issues in language teaching 2014
gholam-reza abbasian nazilsa yekani

the present study investigated comparatively the impact of two types of input enhancement (i.e. textual vs. compound enhancement) on developing grammar ability in iranian efl setting. sixty-five female secondary high school students were selected as a homogenous sample out of about a 100-member population based on nelson language proficiency test. then, their grammar ability was measured based ...

2016
Junyang Wang Jing Bai Yaqiong Zhang Huagao Fang Zhigang Wang

The effects of long chain branching (LCB) degree on the shear-induced isothermal crystallization kinetics of a series of LCB polylactides (LCB PLAs) have been investigated by using rotational rheometer, polarized optical microscopy (POM) and scanning electron microscopy (SEM). Dynamic viscoelastic properties obtained by small-amplitude oscillatory shear (SAOS) tests indicate that LCB PLAs show ...

2003
S. K. Aggarwal

The dynamics and dispersion of nonevaporating droplets in a forced transitional shear layer are studied. The shear layer is formed by two coflowing parallel streams downstream of a splitter plate. The effects of periodic forcing on the dynamics of large-scale vortical structures and on the dispersion characteristics of droplets in a spatially and temporally developing shear layer are investigat...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1998
S Gudi J P Nolan J A Frangos

Mechanical forces arising from strain, pressure, and fluid shear stress are sensed by cells through an unidentified mechanoreceptor(s) coupled to intracellular signaling pathways. In vascular endothelial cells, fluid shear stress is transduced via pathway(s) involving heterotrimeric guanine nucleotide-binding proteins (G proteins) by molecular mechanisms that are unknown. In the present study, ...

Journal: :Circulation 1998
H Hagiwara M Mitsumata T Yamane X Jin Y Yoshida

BACKGROUND The shear stress induced by blood flow may play a pivotal role in the induction or prevention of atherosclerosis by changing endothelial functions. To disclose the mechanisms of this change, we prepared an endothelial cell (EC) cDNA library to select specific clones expressed in response to shear stress. METHODS AND RESULTS The mRNA of cultured confluent bovine aortic ECs (BAECs) s...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علامه طباطبایی - دانشکده ادبیات و زبانهای خارجی 1389

abstract tasks nowadays are at the center of attention in sla research. task types is one of the critical issues in this regard, their effectiveness and suitability to any particular context, their characteristics and the result they yield are among some of these issues. on the other hand, discourse markers (dms) have been very much investigated and their effectiveness in conveying the meaning...

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