Networks of aggregated colloidal particles are solidlike and can sustain an applied shear stress while exhibiting little or no creep; however, ultimately they will catastrophically fail. We show that the time delay for this yielding decreases in two distinct exponential regimes with applied stress. This behavior is universal and found for a variety of colloidal gel systems. We present a bond-ru...

We present a scattering treatment of transport in S-F-S junctions with a small ferromagnetic metal region inside the junction. The charge carriers are assumed not to thermalize with the fer-romagnet conduction band, and the ferromagnetic and superconductor orders coexist close to the interfaces. This requires a small ferromagnetic region in the junction. Ferromagnetism in the junction provides ...

Synthetic jets perpendicular to the mainstream have been used experimentally study coaxial mixing enhancement in this paper. The parameters of such as vorticity, streamwise velocity, radial Reynolds shear stress, and turbulence intensity are measured using particle image velocimetry (PIV) hot wire anemometers. distribution characteristics these with without synthetic were obtained. mechanism wa...

The advantages of exercise training in patients with atherosclerotic coronary artery disease are numerous and include the modification of traditional risk factors, improvement in myocardial and peripheral perfusion, enhancement of exercise tolerance, and reduction of cardiovascular morbidity and mortality.1 These salutary effects are thought to result from improvements in endothelial function a...

Introduction Liver tumours are very frequent. They include benign lesions and malignant primary or secondary tumours (metastases). About 1 million people die each year from liver cancer or liver failure caused by viral hepatitis. The liver is also a frequent site of metastases. Currently, there is no established non-invasive imaging Goldstandard available in order to characterize malignancy for...

We review modeling techniques to evaluate strain induced performance enhancement of modern MOSFETs. While p-channel MOSFETs were intensively studied and are quite well understood, electron transport in n-type strained structures received surprisingly little attention. A rigorous analysis of the subband structure in inversion layers and thin silicon films under stress is performed. Calculated su...

Motivated by interest in the elastic properties of high-strength amorphous metals, we examine the elastic properties of select crystalline phases. Using first-principles methods, we calculate elastic moduli in various chemical systems containing transition metals, specifically early (Ta,W) and late (Co,Ni). Theoretically predicted alloy elastic properties are verified for Ni-Ta by comparison wi...

Nanofluids, in which nano-sized particles (typically less than 100 nm) are suspended in liquids, have emerged as a possible effective way of improving the heat transfer performance of common fluids. In this paper a numerical study is performed to analyze the wall shear stress and heat transfer coefficient of γAl2O3-water nanofluids under laminar forced convection through a circular pipe. It is ...

The use of polymer in hot mix asphalt production has remarkably in recent decades. Destruction due to moisture in hot mix asphalt is of basic matters about flexible pavement durability. In recent decades different ways have been used to evaluate moisture Sensitivity of HMA which some of them are simple with low cost and some are complicated with more reliable results. In this research the effec...