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Title          
CO2 emissions and climate change 
   
 
Abstract    
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
 
 
 

 

Title          
NASA: Exploring Ozone 
   
 
Abstract    
For more information:http://www.nasa.gov/vision/earth/environment/ozone_resource_ page.htmlThis short video combines dynamic ozone visualizations with an int...
 
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Added By - appliedmath
Subject - Earth and Atmospheric Sciences
Document Type - Documentary
Video Duration - 00:02:20
 
 
 

 

Title          
Lockheed Morphing UAV 
   
 
Abstract    

High performance jet fighters have used a variety of morphing mechanisms in the past such as variable-sweep wings and fowler flaps to expand the flight envelope. Lockheed Martin (NYSELMT) is a leading multinational aerospace manufacturer and advanced technology company formed in 1995 by the merger of Lockheed Corporation with Martin Marietta. It is headq...

 
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Added By - justin
Subject - Aeronautics and Astronautics
Document Type - Documentary
Video Duration - 00:03:24
 
 
 

 

Title          
Model of a stirling engine in motion 
   
 
Abstract    

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 steam engines, exchange working fluid with their surroundings as part of the

 
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Added By - quantum
Subject - Mechanical Engineering
Document Type - Demonstration
Video Duration - 00:00:58
 
 
 

 

Title          
Marble displacer Stirling Engine 
   
 
Abstract    

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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Added By - quantum
Subject - Mechanical Engineering
Document Type - Demonstration
Video Duration - 00:00:08
 
 
 

 

Title          
The Phoenix Mars Lander 
   
 
Abstract    
A new space explorer is waiting in the wings and ready to take center stage: the Mars lander called Phoenix. Phoenix's assignment is to dig through the Martian soil and ice in the arctic region and use its onboard scientific instruments to analyze the samples it retrieves. Mars is a cold desert planet with no liquid water on its surface. But in the Martian arctic, water ice lurks just below ground level. Discoveries made by the Mars Odyssey Orbiter in 2002 show large amounts of subsurface water ice in the northern arctic plain. The Phoenix lander targets this circumpolar region using a robotic arm to dig through the protective top soil layer to the water ice below and ultimately, to bring both soil and water ice to the lander platform for sophisticated scientific analysis. The complement of the Phoenix spacecraft and its scientific instruments are ideally suited to uncover clues to the geologic history and biological potential of the Martian arctic. Phoenix will be the first mission to return data from either polar region providing an important contribution to the overall Mars science strategy "Follow the Water" and will be instrumental in achieving the four science goals of NASA's long-term Mars Exploration Program. - Dete...
 
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Added By - matlabuser
Subject - Aeronautics and Astronautics
Document Type -
Video Duration - 00:06:50
 
 
 

 

Title          
Gandhi - His Triumph changed the World Foreve... 
   
 
Abstract    
Mohandas Karamchand Gandhi[4] was born into the Hindu Modh family in Porbandar, in 1869. He was the son of Karamchand Gandhi, the diwan (Prime Minister) of Porbandar, and Putlibai, Karamchand's fourth wife, a Hindu of the Pranami Vaishnava order. Karamchand's first two wives, who each bore him a daughter, died from unknown reasons (rumored to be in childbirth). Living with a devout mother and surrounded by the Jain influences of Gujarat, Gandhi learned from an early age the tenets of non-injury to living beings, vegetarianism, fasting for self-purification, and mutual tolerance between members of various creeds and sects. He was born into the vaishya, or business, caste. In May 1883, at the age of 13, Gandhi was married through his parents' arrangements to Kasturba Makhanji (also spelled "Kasturbai" or known as "Ba"). They had four sons: Harilal Gandhi, born in 1888; Manilal Gandhi, born in 1892; Ramdas Gandhi, born in 1897; and Devdas Gandhi, born in 1900. Gandhi was a mediocre student in his youth at Porbandar and later Rajkot. He barely passed the matriculation exam for Samaldas College at Bhavanagar, Gujarat. He was also unhappy at the college, because his family wanted him to become a barrister. At the age of 18 on Sept...
 
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Added By - A Ghosh
Subject - Humanities
Document Type - Documentary
Video Duration - 00:04:57
 
 
 

 

Title          
High voltage disconnect switch 
   
 
Abstract    

An electrical substation is a subsidiary station of an electricity generation, transmission and distribution system where voltage is transformed from high to low or the reverse using transformers. Electric power may flow through several substations between generating plant and consumer, and may be changed in voltage in several steps.

A substation that has a step-up transformer increases the voltage while decreasing the current, while a step-down  

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Added By - justin
Subject - Electrical Engineering
Document Type - Demonstration
Video Duration - 00:00:09
 
 
 

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