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Title          
Feynman :: Inconceivable nature of nature 
   
 
Abstract    

A second or third gen PAL VHS dub of a vintage original off-air NTSC VHS tape, then captured and compressed and found on a torrent site. squashed, re-compressed and converted for YouTube. all sorts of obvious video and audio problems, but at least it's here, a special treat from the past. anyone with better source, please drop a comment.

Richard Phillips Feynman (May 11, 1918 - February 15, 1988; IPA: /ˈfaɪnmən/) was an American physicist known for expanding the theory of quantum electrodynamics, the physics of the superfluidity of supercooled liquid helium, and particle theory. For his work on quantum electrodynamics, Feynman was a joint recipient of the Nobel Prize in Physics in 1965, together with Julian Schwinger and Sin-Itiro Tomonaga; he developed a widely-used pictorial representation scheme for the mathematical expressions governing the behavior of subatomic particles, which later became known as Feynman diagrams.

He assisted in the development of the atomic bomb and was a member of the panel that investigated the Space Shuttle Challenger disaster. In addition to his work in theoretical physics, Feynman has been credited with pioneering the fie...

 
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Added By - 123456
Subject - Physics
Document Type - Documentary
Video Duration - 00:00:02
 
 
 

 

Title          
Amazing Liquid 
   
 
Abstract    
A non-Newtonian fluid is a fluid in which the viscosity changes with the applied strain rate. As a result, non-Newtonian fluids may not have a well-defined viscosity.

Although the concept of viscosity is commonly used to characterize a material, it can be inadequate to describe the mechanical behavior of a substance, particularly non-Newtonian fluids. They are best studied through several other rheological properties which relate the relations between the stress and strain tensors under many different flow conditions, such as oscillatory shear, or extensional flow which are measured using different devices or rheometers. The rheological properties are better studied using tensor-valued constitutive equations, which are common in the field of continuum mechanics.

An inexpensive, non-toxic sample of a non-Newtonian fluid sometimes known as oobleck can be made very easily by adding corn starch (cornflour) to a cup of water. Add the starch in small portions and stir it in slowly. When the suspension nears the critical concentration - becoming like single cream (light cream) in consistency - the so called "shear thickening" property of this non-Newtonian fluid becomes apparent. The application of force - f...
 
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Added By - 123
Subject - Material Science and Engineering
Document Type - Demonstration
Video Duration - 00:00:02
 
 
 

 

Title          
Manipulating Animated Functions in Mathematic... 
   
 
Abstract    
This is an example of the use of the Manipulate function in Mathematica 6 to animate a 3D plot. The function is sin(mx) x^p y + b where m, b, and p are being manipulated.

Mathematica is a general computing environment, organizing many algorithmic, visualization, and user interface capabilities within a document-like user interface paradigm. It was originally conceived by Stephen Wolfram, developed by a team of mathematicians and programmers that he assembled and led, and it is sold by his company Wolfram Research of Champaign, Illinois.

Since version 1.0 in 1988, Mathematica has steadily expanded into more and more general computational capabilities. Besides addressing nearly every field of mathematics, it provides cross-platform support for a wide range of tasks such as giving computationally interactive presentations, a multifaceted language for data integration, graphics editing, and symbolic user interface construction. An organized index of its functionality can be found here.

Many major educational and research organizations have Mathematica site licenses, and individual licenses are also sold. With Mathematica 6, a free interactive player is provided for running M...
 
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Added By - 123456
Subject - Softwares and Programming Languages
Document Type - Demonstration
Video Duration - 00:00:02
 
 
 

 

Title          
Plotting a Four Dimensional Function 
   
 
Abstract    
This animated plot shows a sequence of three dimensional "slices" of a four dimensional function. The function is f(r,s,t) = r^2 * s^2 * t^5. r and s are each given a range of -1 to 1. f(r,s,t) is plotted from -2 to 2. t is varied from -4 to 4. For a given value of t a three dimensional plot is displayed.
 
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Added By - 123456
Subject - Softwares and Programming Languages
Document Type - Demonstration
Video Duration - 00:00:02
 
 
 

 

Title          
3.5 miles in 10 seconds 
   
 
Abstract    
Born in Berkeley, California, Crossfield grew up in California and Washington. He served with the U.S. Navy as a flight instructor and fighter pilot during World War II. From 1946-1950, he worked in the University of Washington's Kirsten Wind Tunnel while earning his bachelor's(1949) and master's degrees(1950) in aeronautical engineering. In 1950, he joined the National Advisory Committee for Aeronautics' High-Speed Flight Station (now the NASA Dryden Flight Research Center) at Edwards Air Force Base, California, as an aeronautical research pilot. In those early days, it was called Muroc Field, reverse spelling of the wealthy California Corum family who donated the land to the Army Air Corps. Crossfield joined the Navy because he could enter flight training two weeks earlier than a date offered by the Army Air Corps.

Crossfield demonstrated his flight test skills on his very first student solo. His instructor was not available on the designated early morning, so Crossfield, on his own, took off and went through maneuvers he had practiced with his instructor, to include spin entry and spin recovery. During the first spin, Crossfield experienced vibrations, banging, and noise in the aircraft that he had never encountere...
 
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Added By - 123456
Subject - Aeronautics and Astronautics
Document Type - Profile
Video Duration - 00:00:02
 
 
 

 

Title          
Revit Building Tutorial 
   
 
Abstract    
Autodesk Revit is architectural BIM software for Microsoft Windows, currently developed by Autodesk, which allows the user to design with parametric modeling and drafting elements. BIM is a new Computer Aided Design (CAD) paradigm that allows for intelligent, 3D and parametric object-based design. In this way, Revit provides full bi-directional associativity. A change anywhere is a change everywhere, instantly, with no user interaction to manually update any view. A BIM model contains the buildings full life cycle, from concept to construction to decommissioning. This is made possible by Revit's underlying relational database architecture which its creators call the parametric change engine.

Autodesk purchased the Massachusetts-based Revit Technology Corporation for $133 million US in 2002.[1] The latest released version is Revit Architecture 2008 (April 2007) and AutoCAD Revit Architecture Suite 2008 (which includes AutoCAD 2008 32-bit & 64-bit).

Revit is a single file database that can be shared among multiple users. Plans, sections, elevations and schedules are all interconnected, and if a user makes a change in one view, the other views are automatically updated. Thus, Revit d...
 
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Added By - 123456
Subject - Softwares and Programming Languages
Document Type - Demonstration
Video Duration - 00:00:02
 
 
 

 

Title          
Theory of Lift Generation - Airfoil 
   
 
Abstract    

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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Added By - anandsaxena
Subject - Aeronautics and Astronautics
Document Type - White Board
Video Duration - 00:00:02
 
 
 

 

Title          
Fuel Cells 
   
 
Abstract    
In essence, a fuel cell works by catalysis, separating the component electrons and protons of the reactant fuel, and forcing the electrons to travel through a circuit, hence converting them to electrical power. Another catalytic process takes the electrons back in, combining them with the protons and the oxidant to form waste products (typically simple compounds like water and carbon dioxide). In the archetypal hydrogen–oxygen proton exchange membrane fuel cell (PEMFC) design, a proton-conducting polymer membrane, (the electrolyte), separates the anode and cathode sides. This was called a "solid polymer electrolyte fuel cell" (SPEFC) in the early 1970s, before the proton exchange mechanism was well-understood. (Notice that "polymer electrolyte membrane" and "proton exchange membrane" result in the same acronym.) On the anode side, hydrogen diffuses to the anode catalyst where it later dissociates into protons and electrons. The protons are conducted through the membrane to the cathode, but the electrons are forced to travel in an external circuit (supplying power) because the membrane is electrically insulating. On the cathode catalyst, oxygen molecules react with the electrons (which have traveled through the external circu...
 
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Added By - sidpatel
Subject - Energy
Document Type - White Board
Video Duration - 00:07:02
 
 
 

 

Title          
Building a Human - Comments by Princeton prof... 
   
 
Abstract    

Lee M. Silver (born 1952) is a professor at Princeton University in the Department of Molecular Biology and the Woodrow Wilson School of Public and International Affairs. He also has joint appointments in the Program in Science, Technology, and Environmental Policy, the Center for Health and Wellbeing, the Office of Population Research, and the Princeton Environmental Institute, all at Princeton University.

Silver is the author of the controversial book Remaking Eden: How Genetic Engineering and Cloning Will Transform the American Family (1998). In the book he takes a positive view on human cloning, designer babies and similar prospects. This attracted harsh criticism from various sides. In this book he coined the term  

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Added By - 123456
Subject - Bioengineering
Document Type - Documentary
Video Duration - 00:00:02
 
 
 

 

Title          
Cell division on contrast microscope 
   
 
Abstract    
Cell division is a process by which a cell, called the parent cell, divides into two cells, called daughter cells. Cell division is usually a small segment of a larger cell cycle. In meiosis however, a cell is permanently transformed and cannot divide again.

For simple unicellular organisms such as the Amoeba, one cell division reproduces an entire organism. On a larger scale, cell division can create progeny from multicellular organisms, such as plants that grow from cuttings. Cell division also enables sexually reproducing organisms to develop from the one-celled zygote, which itself was produced by cell division from gametes. And after growth, cell division allows for continual renewal and repair of the organism.

The primary concern of cell division is the maintenance of the original cell's genome. Before division can occur, the genomic information which is stored in chromosomes must be replicated, and the duplicated genome separated cleanly between cells. A great deal of cellular infrastructure is involved in keeping genomic information consistent between "generations".

Cells are classified into two categories: simple, non-nucleated prokaryotic cells, and complex, nucleated eukaryot...
 
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Added By - 123
Subject - Biology
Document Type - Experiments
Video Duration - 00:00:02
 
 
 

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