منابع مشابه
the 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...
DYNAMICS OF MUDBANKS ALONG A COAST EXPERIENCING RECURRING EPISODES OF EROSION AND ACCRETION
The morphological states of Guyana’s coastal system, at various spatial and temporal scales, are found to be influenced by the formation and migration of mudbanks. Stationary and propagating mudbanks along the coast are investigated with the use of multiple data sources, including aerial photographs, satellite imagery, GPS measurements, and a time series of coastal profile data (1941-1987...
متن کاملAccretion of gas onto nearby spiral galaxies
We present evidence for cosmological gas accretion onto spiral galaxies in the local universe. The accretion is seen through its effects on the dynamics of the extra-planar neutral gas. The accretion rates that we estimate for two nearby spiral galaxies are of the order of their star formation rates. Our model shows that most of the extra-planar gas is produced by supernova feedback (galactic f...
متن کاملMagnetized Accretion Flows: Effects of Gas Pressure
We study how axisymmetric magnetohydrodynamical (MHD) accretion flows depend on γ adiabatic index in the polytropic equation of state. This work is an extension of Mościbrodzka & Proga (2008), where we investigated the γ dependence of 2-D Bondilike accretion flows in the hydrodynamical (HD) limit. Our main goal is to study if simulations for various γ can give us insights into to the problem of...
متن کاملGasdynamic Investigation of Rotating Gas Accretion
Gasdynamic features of slowly rotating gas axisymmetric accretion onto a gravitating center are investigated. The process of flow restructuring is studied as the angular velocity of accreting matter approaches the Keplerian angular velocity. For spherically-symmetric accretion, the conditions are found of the existence of a steady-state supersonic solution for various external boundary conditio...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1970
ISSN: 0074-1809
DOI: 10.1017/s0074180900004897