نتایج جستجو برای: surface phenomenon

تعداد نتایج: 779402  

Journal: :Thermal Science 2021

In this study a novel mathematical model for electroosmotic flow Cu-water based nanofluid with heat transfer phenomenon is reported scraped-surface exchanger. The initiated due to motion of lower wall the channel and axial pressure gradient. modelled aid low Reynolds number lubrication approximation theory. Exact analytical expressions are gathered velocity, stream functions various stations Ph...

A Horfar J Bazargan J Sadeghian M Khayat Kholghi

Analysis of non-laminar flows in coarse alluvial beds has a wide range of applications in various civil engineering, oil and gas, and geology problems. Darcy equation is not valid to analyze transient and turbulent flows, so non-linear equations should be applied. Non-linear equations are classified into power and binomial equations. Binomial equation is more accurate in a wide range of velocit...

Liquid sloshing is a common phenomenon in the transporting of liquid tanks. Liquid waves lead to fluctuating forces on the tank wall. If these fluctuations are not predicted or controlled, they can lead to large forces and momentum. Baffles can control liquid sloshing fluctuations. One numerical method, widely used to model the liquid sloshing phenomena is Smoothed Particle Hydrodynamics (SPH)....

Journal: :Physical review letters 2003
David J Bergman Mark I Stockman

We make a step towards quantum nanoplasmonics: surface plasmon fields of a nanosystem are quantized and their stimulated emission is considered. We introduce a quantum generator for surface plasmon quanta and consider the phenomenon of surface plasmon amplification by stimulated emission of radiation (spaser). Spaser generates temporally coherent high-intensity fields of selected surface plasmo...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2011
Ye Sun Lei Zhu Kenneth L Kearns Mark D Ediger Lian Yu

The crystallization of glasses and amorphous solids is studied in many fields to understand the stability of amorphous materials, the fabrication of glass ceramics, and the mechanism of biomineralization. Recent studies have found that crystal growth in organic glasses can be orders of magnitude faster at the free surface than in the interior, a phenomenon potentially important for understandin...

Journal: :Joint, bone, spine : revue du rhumatisme 2007
Martine Gayraud

Vascular acrosyndromes constitute a common reason for physician visits. They are associated with connective tissue disease; for example, 90% of patients with scleroderma experience Raynaud's phenomenon. The rheumatologist must strive to establish the diagnosis, to identify a potential underlying cause, and to prescribe effective treatment when the symptoms are incapacitating. Raynaud's phenomen...

Journal: :The Journal of the Association of Physicians of India 2010
Renu Saigal Amit Kansal Manoop Mittal Yadvinder Singh Hari Ram

Raynauds phenomena (RP) is a commonly encountered clinical manifestation which may be primary or secondary to underlying disease. There is imbalance between vasoconstricting and vasodilating factors. Physical examination, nailfold capillaroscopy and immunological tests can differentiate primary from secondary RP. Treatment involves prevention of RP so that permanent ischemic damage i.e. gangren...

Sayed Hadi Razavi, Sayed Mohammad Mousavi Vahid Samavati

The effects of some synthetic sweeteners on the rheological and physical properties of guar gum in dilute solutions were investigated.Measurements include the determination of intrinsic viscosity and the particle size, surface weighted mean [D3, 2], volume weighted mean [D4,3] and specificsurface area ofguar gum andsyntheticsweeteners mixtures. T...

Journal: :The Journal of General Physiology 1956
M. Castañeda-Agulló

1. Evidence has been found that Northrop's phenomenon (so called by us) is produced in the digestion of casein or hemoglobin brought about by trypsin, papain, and pepsin either crude or crystalline in the presence of gelatin. 2. Anson's and Kunitz' methods permit the measure of proteolytic activity of any protease on casein or hemoglobin substrate in the presence of gelatin, even in very small ...

Sabzpoushan, Ayatolahi, Noble, Towhidkhah,

Fibrillation is a hazardous phenomenon in cardiac muscle and so any new work towards the understanding of this process is important to the development of new methods in diagnosis and therapy. In this work we have used surface and intra cardiac ECGs of patients with chronic atrial fibrillation (AF). By means of the blind source separation (BSS) algorithm, which is a well-known method in signal p...

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