نتایج جستجو برای: thermal diffusion factor

تعداد نتایج: 1203454  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده شیمی 1389

in this project, some new polyaspartimides, (pas)s, have been synthesized form michael addition reaction between new synthetic bismaleimide (bmi) and some aromatic diamines. a characteristic property of this polyaspartimides is a pendent carboxylic group, which introduced to these polymers from new bismaleimide. bismaleimides (bmi) is one of the interesting compounds, which can be self-polymeri...

In this article, M2 factor of a thin disk laser with unstable resonator in two regimes is calculated numerically. In the first case, thermal effects are ignored and the parameters of beam width, divergence angle, radius of wave front curvature and finally, M2 factor of laser beam are calculated by using generalized beam parameters. These calculations show that the beam quality of the laser is d...

2012

choice a small deformation parameter is required. This is not reasonable compared to other deformation parameters in this region and one concludes that the NILSSON approach is not applicable here. Even if the additional freedom of non-axially symmetric shapes is allowed in accordance with the calc u l a t i o n s o f HECHT a n d SATCHLER 1 6 , it is n o t p o s sible to account for the spins an...

2012
G.

conclusions. If a laser giant pulse is sent through the liquid the beam diameter is reduced during its path through the cell due to self-focusing. The diameter at the exit window, which decreases with increasing laser power, follows quasistationarily the instantaneous laser power. For low incident laser power, the diameter increases again after the power has passed its peak value. At high laser...

فرازدل, فرانک , مسعودی, فریبرز , مهرابی, بهزاد ,

Next to the Ghohroud granitic intrusive body in the south of Kashan, skarns are outcropped, of which some contain garnet crystals with obvious zoning. In order to investigate characteristics of this zonation, garnet crystals were analyzed from core to rim by EDX point analysis, using scanning electron microscope. Obtained data show that garnet crystals belong to grandite (grassolar-andradite) s...

This article explores the heat and mass transfer behaviour of magnetohydrodynamic free convective flow past a permeable vertical rotating cone and a plate filled with gyrotactic microorganisms in the presence of nonlinear thermal radiation, thermo diffusion and diffusion thermo effects. We presented dual solutions for the flow over a rotating cone and a rotating flat plate cases. Similarity var...

2009
Peter J. Basser

Developments in the last century have led to a better understanding of diffusion, the perpetual mixing of molecules caused by thermal motion. In this chapter, the basic principles governing the diffusion phenomenon and its measurement using magnetic resonance (MR) are reviewed. The concepts of the apparent diffusion coefficient and of the diffusion propagator as well as their MR measurements ar...

Journal: :physical chemistry research 0
hossein azizi toupkanloo university of neyshabur manoochehr fathollahi faculty of material and manufacturing technologies, malek ashtar university of technology, p.o. box 16765-3454, tehran, iran

in this work, the thermal reaction of aluminum (al) and nickel oxide (nio) was investigated by molecular dynamics simulations. some effective features of reaction such as reaction temperature, the reaction mechanism, and diffusion rate of oxygen into aluminum structure were studied. reaxff force field was performed to study the al/nio thermite reaction behavior at five different temperatures (5...

2013
Peter J. Basser

Developments in the last century have led to a better understanding of diffusion, the perpetual mixing of molecules caused by thermal motion. In this chapter, the basic principles governing the diffusion phenomenon and its measurement using magnetic resonance (MR) are reviewed. The concepts of the apparent diffusion coefficient and of the diffusion propagator as well as their MR measurements ar...

Journal: :IEICE Transactions 2010
Masato Uchida Kei Ohnishi Kento Ichikawa Masato Tsuru Yuji Oie

In this paper we propose a file replication scheme inspired by a thermal diffusion phenomenon for storage load balancing in unstructured peer-to-peer (P2P) file sharing networks. The proposed scheme is designed such that the storage utilization ratios of peers will be uniform, in the same way that the temperature in a field becomes uniform in a thermal diffusion phenomenon. The proposed scheme ...

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