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Tutorial on CFD Geom (Better Resolution)
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A simple demo of how to use CFD Geom to create a rectangular channel for flow solving. A small amount of geometric and symmetric stretch is used in z direction.
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GPU fluid simulation - fire
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I found this video on the web and it does not belong to me. However i thought this will be of interets to the community. Thanks Keenan for this wonderful work. Following is quoted from Keenan. 'During my time at NVIDIA I wrote a 3D Navier-Stokes fluid solver that runs entirely on the GPU. Fluid solvers are used to generate realistic, physically-based animations of water and smoke. Typically it takes several minutes or hours to generate each frame of animation, but by making some minor compromises in visual quality and taking advantage of the GPU's parallelism and bandwidth the solver is fast enough for real-time applications (e.g., around 120-180 frames per second at 64x64x128 on a GeForce 8800 GTX). See http://www.cs.caltech.edu/~keenan/pro... for more information' |
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Nobel Laureate Venki Ramakrishnan: by Nature ...
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Venkatraman "Venki" Ramakrishnan (Tamil: வெங்கட்ராமன் ராமகிருஷ்ணன்; born 1952 in Chidambaram, Tamil Nadu, India) is a structural biologist at the MRC Laboratory of Molecular Biology in Cambridge, England.[1] He shared the 2009 Nobel Prize in Chemistry with Thomas A. Steitz and Ada E. Yonath "for studies of the structure and function of the ribosome".[2]
Venkatraman Ramakrishnan was born in Chidambaram in Cuddalore district of Tamil Nadu, India.[3]
He moved to Baroda (Vadodara) in Gujarat state at the age of three, where he had his schooling, except for spending 1960–61 in Adelaide, Australia. Following his Pre-Science at the Maharaja Sayajirao University of Baroda, he did his undergraduate studies in the same university on a National Science Talent Scholarship, graduating with a B.Sc. in Physics in 1971.
In a January 2010 lecture at the Indian Institute of Science, he revealed that he failed to get a seat at any of the colleges of the Indian Institutes of Technology, and Christian Medical College, Vellore, Tamil Nadu.[4]
Immediately after graduation he moved to the U.S.A., where ... |
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Harvard Biovisions - The Inner Life of a Cell
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Fantastic animation of the inside of a cell from Harvard Biovisions.Harvard University (incorporated as The President and Fellows of Harvard College) is a private university in Cambridge, Massachusetts, USA and a member of the Ivy League. Founded in 1636 by the Massachusetts Legislature,[2] Harvard is the oldest institution of higher learning in the United States, as well as the first and oldest corporation in the Americas.[4]
Initially referred to simply as "the new college", the institution was named Harvard College on March 13, 1639, after its first principal donor, a young clergyman named John Harvard. A graduate of Emmanuel College, Cambridge in England, John Harvard bequeathed about four hundred books in his will to form the basis of the college library collection, along with half his personal wealth worth several hundred pounds. The earliest known official reference to Harvard as a "university" rather than a "college" occurred in the new Massachusetts Constitution of 1780.
In his 1869-1909 tenure as Harvard president, Charles William Eliot radically transformed Harvard into the pattern of the modern research university. Eliot's reforms included elective courses, small classes, and entrance exam... |
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Sound Refraction - Sound Lens
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Refraction is the change in direction of a wave due to a change in its speed. This is most commonly observed when a wave passes from one medium to another. Refraction of light is the most commonly observed example, but any type of wave can refract when it interacts with a medium, for example when sound waves pass from one medium into another or when water waves move into water of a different depth. Refraction is described by Snell's law. In optics, refraction occurs when light waves travel from a medium with a given refractive index to a medium with another. At the b... |
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Marble displacer Stirling Engine
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5 rolling marbles act as the displacer in this engine. The rigid connection between the piston and conrod is what tips the test tube, rolling the marbles. Model of stirling engine realized by a syringe and a test-tube. In the family of heat engines, 'Stirling engine' defines a closed-cycle regenerative hot air engine (or other permanent gas) engine, though the term is often used incorrectly to refer generically to a much wider range of hot air engine types. In this context, "closed-cycle" means that the working fluid is permanently contained within the system, whereas "open-cycle" engines such as internal combustion engine and some st... |
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Echo Cardio Gram and Color Doppler
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Echo Cardio Gram and Color Doppler. An echocardiogram, often referred to in the medical community as a cardiac ECHO or simply an ECHO, is a sonogram of the heart. Also known as a cardiac ultrasound, it uses standard ultrasound techniques to image two-dimensional slices of the heart. The latest ultrasound systems now employ 3D real-time imaging. In addition to creating two-dimensional pictures of the cardiovascular system, an echocardiogram can also produce accurate assessment of the velocity of blood and cardiac tissue at any arbitrary point using pulsed or continuous wave Doppler ultrasound. This allows assessment of cardiac valve areas and function, any abnormal communications between the left and right side of the heart, any leaking of blood through the valves (valvular regurgitation), and calculation of the |
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Theory of Lift Generation - Airfoil
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There have been varies theories explaining the production of lift by an airfoil. Interestingly, many rather most of these have been misconceived and hence are false. This lists the major theories proposed and the drawbacks they suffer finally leading to a correct acceptable theory.
A fluid flowing past the surface of a body exerts a force on it. Lift is defined to be the component of this force which is perpendicular to the oncoming flow direction.[1] It contrasts with the drag force, which is defined to be the component of the fluid-dynamic force |
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Sugar+NaOH and KMnO4
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An experiment showing Sugar+NaOH and KMnO4 |
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Lisa Randall Lecture
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The Lavin Agency presents Lisa Randall, one of the most cited scientists in the world, and author of the influential book on string theory, Warped Passages: Unraveling the Mysteries of the Universe's Hidden Dimensions. Lisa Randall (born 18 June 1962) is an American theoretical physicist and a leading expert on particle physics and cosmology. She works on several of the competing models of string theory in the quest to explain the fabric of the universe, and was the first tenured woman in the Princeton University ph... |
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rolex replica
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