منابع مشابه
Nonlinear dynamics of surface steps
Surface steps are key elements in the dynamics of a crystal surface below its thermodynamic roughening transition, because they constitute long-lived structural defects which are nevertheless highly mobile and prone to strong fluctuations [1]. The description of surface morphology evolution in terms of the thermodynamics and kinetics of steps goes back at least half a century [2]. During the pa...
متن کاملthe study of bright and surface discrete cavity solitons dynamics in saturable nonlinear media
امروزه سالیتون ها بعنوان امواج جایگزیده ای که تحت شرایط خاص بدون تغییر شکل در محیط منتشر می-شوند، زمینه مطالعات گسترده ای در حوزه اپتیک غیرخطی هستند. در این راستا توجه به پدیده پراش گسسته، که بعنوان عامل پهن شدگی باریکه نوری در آرایه ای از موجبرهای جفت شده، ظاهر می گردد، ضروری است، زیرا سالیتون های گسسته از خنثی شدن پراش گسسته در این سیستم ها بوسیله عوامل غیرخطی بوجود می آیند. گسستگی سیستم عامل...
Epithelial cell surface polarity: the early steps.
Establishment and maintenance of epithelial cell surface polarity is of vital importance for the correct function of transporting epithelia. To maintain normal cell function, the distribution of apical and basal-lateral proteins is highly regulated and defects in expression levels or plasma membrane targeting can have severe consequences. It has been shown recently that initiation of cell-surfa...
متن کاملLonger time steps for molecular dynamics
Simulations of the dynamics of biomolecules have been greatly accelerated by the use of multiple time-stepping methods, such as the Verlet-I/r-RESPA ~reversible reference system propagator algorithms! method, which is based on approximating ‘‘slow’’ forces as widely separated impulses. Indeed, numerical experiments have shown that time steps of 4 fs are possible for these slow forces but unfort...
متن کاملSimulating stochastic dynamics using large time steps.
We present an approach to investigate the long-time stochastic dynamics of multidimensional classical systems, in contact with a heat bath. When the potential energy landscape is rugged, the kinetics displays a decoupling of short- and long-time scales and both molecular dynamics or Monte Carlo (MC) simulations are generally inefficient. Using a field theoretic approach, we perform analytically...
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ژورنال
عنوان ژورنال: Physica A: Statistical Mechanics and its Applications
سال: 2001
ISSN: 0378-4371
DOI: 10.1016/s0378-4371(01)00035-8