نتایج جستجو برای: condensation

تعداد نتایج: 32341  

2010
JAN WEILAND

In the far edge, in L-mode plasmas and the outer parts of the H-mode barrier, tokamak plasmas may be so collisional that parallel electron motion can be neglected or included as a perturbation. Thus we have a regime that is basically two dimensional. We will here consider the outer part of the H-mode barrier where transport is small. Recently a condensation mode was found for this regime. We ha...

Journal: :Physical review letters 2005
Ben O'Shaughnessy Qingbo Yang

Counterion condensation is a basic feature of 2D electrostatics exhibited by highly charged rodlike polymers such as DNA. In the framework of the Poisson Boltzmann equation with salt, we show that such a polymer of radius a attracts a condensate of thickness RM=A(axi)1/2 where xi is the Debye length and A depends weakly on the polymer charge density q0. To leading order in 1/ln(xi/a), we derive...

2005
Seiji Terashima

We study the fuzzy or noncommutative Dp-branes in terms of infinitely many unstable D0-branes, from which we can construct any Dp-branes. We show that the tachyon condensation of the unstable D0-branes induces the noncommutativity. In the infinite tachyon condensation limit, most of the unstable D0-branes disappear and remaining D0-branes are actually the BPS D0-branes with the correct noncommu...

2009
Mark Hindmarsh Huiquan Li

We investigate the spacetime-dependent condensation of the tachyon in effective field theories. Previous work identified singularities in the field which appear in finite time: infinite gradients at the kinks, and (in the eikonal approximation) caustics near local minima. By performing a perturbation analysis, and with numerical simulations, we demonstrate and explain key features of the conden...

2002
Thomas B. Moeslund Erik Granum

In model-based tracking the problem of a high dimensional solution space often appears. The standard solution to this problem is to use a prediction followed by an iterative search or a Kalman filter. The drawback of both is the risk of ending up in a local extremum. In this paper we suggest to apply bootstrapping to increase performance in model-based tracking. The bootstrapping information is...

Journal: :The Journal of Cell Biology 2004
Rabiya Tuma

Actin branches out in yeast any of the same proteins control actin polymerization in budding yeast and mammalian cells. But budding yeast researchers—hampered by an emphasis on genetics and an inaccessible yeast cytoplasm dense with ribosomes and glycogen granules—have often lagged behind in providing structural descriptions based on electron microscopy (EM). This has fueled suspicions about wh...

Journal: :journal of sciences, islamic republic of iran 2011
a. shafiee

a series of new hexahydroquinoline and 1,4-dihydropyrimidine derivatives were synthesized. condensation of 2-methyl- thiazole-4-carboxaldehyde (1) with 1,3-cyclohexanedione and alkyl 3- aminocrotonate afforded 4-(2-methyl-thiazol-4-yl)-hexahydroquinoline while condensation of aldehyde (1) with benzoyl acetone and thiourea gave 1,4-dihydropyrimidine derivatives. the stereochemistry of 1,4-dihydr...

2015
T. Sundararajan Portonovo S. Ayyaswamy P. S. AYYASWAMY

The hydrodynamics and heat/mass transport associated with condensation on a moving drop have been investigated for the intermediate Reynolds-number range of drop motion (Re = O(100)). The drop environment is a mixture of saturated vapour and a non-condensable. The formulation entails a simultaneous solution of the quasi-steady elliptic partial differential equations that describe the flow field...

Abolfazle Mohammad Salehi, Fatemeh Mashhadi Abba, Mahin Bakhshi , Sedigheh Bakhtiari , Seyyed Hasan Mohajerani , Zahra Elmi Rankohi,

Condensation Pressure Effect on Microleakage of Mineral Trioxide Aggregate Seyed Mohsen Jalalzade 2Elham Khoshbin *3Seyed Abdolkarim Tabatabaei Endodontist, Mashhad, Iran. Assistant professor of endodontic department, Dental school, Hamedan University of medical science, Hamedan, Iran Post graduate student of pediatric dentistry department, Dental school, Shahid Beheshti Universi...

2008
James M. Cline Hassan Firouzjahi Patrick Martineau

We argue that it may be possible to reheat the universe after inflation driven by D-brane annihilation, due to the coupling of massless fields to the time-dependent tachyon condensate which describes the annihilation process. This mechanism can work if the original branes annihilate to a stable brane containing the standard model. Given reasonable assumptions about the shape of the tachyon back...

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