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Influence of a Streamwise Pressure Gradient o... 

In this video, Kiran Dellimore gives a broad overview of his research paper entitled  'Influence of a Streamwise Pressure Gradient on Film-Cooling Effectiveness' published in the JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER,Vol. 23, No. 1, January-March 2009. His co-authors are Carlos Cruz, Andre W. Marshall, and Christopher P. Cadou all from the University of Maryland, College Park, Maryland 20742.

The paper may be accessed using the following DOI: 10.2514/1.35717

Film cooling is widely used in conventional gas turbine and rocket engines to minimize thermal loading of engine structures and to manage heat transfer between hot, reacting gases and cooler structural components. Previous experimental work has shown that streamwise pressure gradients strongly influence the performance of the film.This paper extends semi-empirical modeling ideas for wall-jet film cooling to include the effects of adverse and favorable pressure gradients. The extended model shows that a pressure gradient’s effect on cooling performance depends on whether the velocity of the film is greater than the core flow (a wall-jet...

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Added By - kdellimo
Subject - Aeronautics and Astronautics
Document Type - Journal Paper Discussion
Video Duration - 00:05:20


Sound & Vision (Animation) 
At the University of Plymouth, researchers in the Computer Music Research Laboratory are developing new tools to aid the film composer. Their research is creating programmes that can analyse and re-create the style of the great composers -- or learn emotional response to music and compose accordingly.
And animation students at the University of the West of England, in nearby Bristol, are involved in an exciting collaboration with students from the Royal Academy of Music to investigate how the creative process develops and to learn the importance of professional collaboration.
Partnered at random the students have just five weeks to produce a 1 minute film complete with soundtrack. Unlike traditional approaches where the composer creates music to fit a film, or as sometimes happens in animation, the film is drawn to fit in with the music, neither partner is pre-eminent, creating a truly collaborative experience.
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Added By - 123456
Subject - Music
Document Type - Documentary
Video Duration - 00:05:03


Manifold Microchannel Cooler for Direct Backs... 
Manifold Microchannel Cooler for Direct Backside Liquid Cooling of SiC Power Devices, presented by Lauren Everhart at the Mechanical Engineering Summer Lecture series at the University of Maryland (July 2008). Power semiconductor devices are semiconductor devices used as switches or rectifiers in power electronic circuits (switch mode power supplies for example). They are also called power devices or when used in integrated circuits, called power ICs. Some common power devices are the power diode, thyristor, power MOSFET and IGBT (insulated gate bipolar transistor). A power diode or MOSFET, for example, operates on similar principles as its low-power counterpart, but is able to carry a larger amount of current and typically is able to support a larger reverse-bias voltage in the off-state. Structural changes are often made in power devices to accommodate the higher current density, higher power dissipation and/or higher reverse breakdown voltage. The vast majority of the discrete (i.e non integrated) power devices are built using a vertical structure, whereas small-signal devices employ a lateral structure. With the vertical structure, the current rating of the device is proportional to its area, and the volta...
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Added By - researchusa
Subject - Mechanical Engineering
Document Type - Seminars and Presentations
Video Duration - 00:31:19


high speed camera: lighter 

A high speed camera is a device used for recording slow-motion playback films, or used for scientific study of transient phenomena.


A normal motion picture is filmed and played back at 24 frames per second, while television uses 25 frames/s (PAL) to 29.97 frames/s (NTSC). High speed cameras can film up to 250,000 frames/s by running the film over a rotating prism or mirror instead of using a shutter, thus reducing the need for moving parts. Using this ...

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Added By - matlabuser
Subject - Laboratory Equipment
Document Type - Patents and Inventions
Video Duration - 00:00:24


Lugosi teaches math - Many Vs Infinite 2 

Béla Lugosi teaches teaches advanced mathematic.

Added: February 07, 2007 Béla Lugosi teaches teaches advanced mathematical concepts. This is rare footage of Lugosi in his last on screen contibution in what is consdered by many a low point in his career and what is considered by some inspirational. This educational series was left unfinised due to Lugosi's death in 1958. The series was an attempt to show undergraduate students that math is not scary. Lugosi's hidden love for mathematics is illuminated by his animated teaching style.

Béla Lugosi (October 20, 1882 - August 16, 1956), was a Hungarian actor best known for his portrayal of Count Dracula in the American

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Added By - appliedmath
Subject - Mathematics
Document Type - Course Lecture
Video Duration - 00:09:02


Community Roots Maryland 
Daniel Lewkowicz daniel@croots.org

This is a promotional film for the Community Roots organization. Shot and edited on a Macbook. Distributed over Youtube by and for the Youth of our Nation. Contact us to get involved and start something big where ever you are.
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Added By - dlewkowi
Subject - Political Science
Document Type - Vid/Terp 2008 www.umd.edu
Video Duration - 00:03:17


CO2 emissions and climate change 
Global warming is the increase in the average temperature of the Earth's near-surface air and oceans in recent decades and its projected continuation. The global average air temperature near the Earth's surface rose 0.74 ± 0.18 °C (1.33 ± 0.32 °F) during the 100 year period ending in 2005.[1] The Intergovernmental Panel on Climate Change (IPCC) concludes "most of the observed increase in globally averaged temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations"[1] via the greenhouse effect. Natural phenomena such as solar variation combined with volcanoes probably had a small warming effect from pre-industrial times to 1950 and a small cooling effect from 1950 onward.[2][3] These basic conclusions have been endorsed by at least 30 scientific societies and academies of science,[4] including all of the national academies of science of the major industrialized countries.[5][6][7] While individual scientists have voiced disagreement with the conclusions of the IPCC[8], the overwhelming majority of scientists working on climate change are in agreement with the conclusions.
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Added By - publichealth
Subject - Public Health
Document Type - Discussion
Video Duration - 00:01:55


FASTCAM SA1 : DigInfo 
DigInfo - http://movie.diginfo.tv Photron, who produces high-speed video camera solutions, has just released its FASTCAM SA1. This high-speed camera can film 1,024x1,024 full-frame pixels at 5,400 frame/s. Segmented frame is available as well: 1,024x512 pixels at 10,000 frame/s; 128x128 pixels at 90,000 frame/s; and 128x32 pixels at the maximum speed of 150,000 frame/s. The camera comes with a 2-microsecond electronic shutter, an embedded CMOS sensor for color and monochrome shoots, and a collection of presets so as to not to initially overwhelm the user. It comes with 8GB of memory (easily expandable to 16GB) which can be subdivided into folders so you can organize your photos more effectively.
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Added By - matlabuser
Subject - Laboratory Equipment
Document Type - Demonstration
Video Duration - 00:01:31


Saturn: A Giant Thrust into Space 1962 
The film provides an introduction and overview of the Saturn launch vehicle. It is designed with stages to drop off as fuel is spent. There may be two, three, or four stages, depending on the payload. The Saturn rocket will be used to send Apollo missions to the Moon and back. Guidance systems and booster engine rockets are based on proven mechanisms. Scale models are used to test the engines. Hardware, airframes, guidance systems, instrumentation, and the rockets are produced at sites throughout the country. The engines go to Marshall Space Flight Center for further tests. After partial assembly, the vehicle is shipped to Cape Canaveral in large pieces where it is assembled using specially built equipment and structures. Further trials are performed to assure successful launches.
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Added By - A Ghosh
Subject - Aeronautics and Astronautics
Document Type - Documentary
Video Duration - 00:09:54


Structural Collapse: the classic case -Tacoma... 

The collapse of the bridge was recorded on film by Barney Elliott, owner of a local camera shop, and shows Leonard Coatsworth leaving the bridge after exiting his car. In 1998, The Tacoma Narrows Bridge Collapse was selected for preservation in the United States National Film Registry by the Library of Congress as being "culturally, historically, or aesthetically significant." This footage is still shown to engineering, architecture, and physics students as a cautionary tale.[9] Elliot's original films of the construction and collapse of the bridge were shot on 16mm  

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Added By - justin
Subject - Civil and Environmental Enginering
Document Type - Demonstration
Video Duration - 00:04:12

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