نتایج جستجو برای: hydrodynamic properties

تعداد نتایج: 890886  

Journal: :The Journal of experimental biology 2016
Paolo S Segre David E Cade Frank E Fish Jean Potvin Ann N Allen John Calambokidis Ari S Friedlaender Jeremy A Goldbogen

Maneuverability is one of the most important and least understood aspects of animal locomotion. The hydrofoil-like flippers of cetaceans are thought to function as control surfaces that effect maneuvers, but quantitative tests of this hypothesis have been lacking. Here, we constructed a simple hydrodynamic model to predict the longitudinal-axis roll performance of fin whales, and we tested its ...

2003
A. Ortega J. Garcı́a de la Torre

The hydrodynamic properties of cylindrical ~rodlike and discoidal! particles in dilute solution have been computed using the bead-shell model treatment. Previous results @Tirado and Garcı́a de la Torre, J. Chem. Phys. 71, 2581 ~1979!; 73, 1993 ~1980!# for rods with length-to-diameter ratio p .2 are now extended to short cylinders and disks down to p50.1. The intrinsic viscosity is obtained for r...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده علوم پایه 1391

one of the applications of nanotechnology is use of carbon nanotubes for the targeted delivery of drug molecules. to demonstrate the physical and chemical properties of biomolecules and identify new material of drug properties, the interaction of carbon nanotubes (cnts) with biomolecules is a subject of many investigations. cnts is a synthetic compound with extraordinary mechanical, thermal, el...

Journal: :international journal of marine science and engineering 0
m. a. nezammahalleh geomorphology, physical geography department, geography faculty, university of tehran, tehran m. yamani geomorphology, physical geography department, geography faculty, university of tehran, tehran sh soltani department of civil engineering, neka branch, islamic azad university, neka, iran a. maldar badeli department of engineering and technology, golestan university, aliabad katool, iran a. rastegar department of engineering and technology, golestan university, aliabad katool, iran

in coastal areas, hydrodynamic factors make changes in shorelines geomorphology. this can affect coastal facilities and cause hazards to human societies in the areas. this study has investigated the influence of wave and tide properties on khamir port, hormoz strait in coast of persian gulf. the purpose of the study is to make a mathematical regional and local modeling of water level fluctuatio...

2013
Gerhard Sandmann Peter Böger

New 2-phenylpyridazinones, analogs o f 4-chloro-5-methylamino-2-phenylpyridazin-3(2H)ones, were assayed for their phytotoxic activity to interfere with plant pigment formation. Six derivatives with — SCF3, — OCF2CH FCF3, — O CH F2, — CN, or — Br in meta position o f the phenyl ring exhibited similar or better bleaching activity than the m -CF3 analog (norflurazon). The activity is predominantly...

2008
Bálint Tóth Wendelin Werner

We show that the two-component system of hyperbolic conservation laws ∂tρ + ∂x(ρu) = 0 = ∂tu + ∂xρ appears naturally in the formally computed hydrodynamic limit of some randomly growing interface models, and we study some properties of this system.

2001
Paolo Giuliani

We review the main properties of shell models for magnetohydrodynamic (MHD) turbulence. After a brief account on shell models with nearest neighbour interactions, the paper focuses on the most recent results concerning dynamical properties and intermittency of a model which is a generalization to MHD of the Gledzer-Yamada-Okhitani (GOY) model for hydrodynamic. Applications to astrophysical prob...

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