Intel Hyper Threading Technology....how it works.....
Showing posts with label Solar PV. Show all posts
Showing posts with label Solar PV. Show all posts
Monday, August 16, 2010
Mains Moct Test
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Solar PV
CIVIL SERVICES CLUB,SVL
INDIA AND WORLD
08.08.10
1.Answer any one of the following in about 200 words: 20
a. “A budding strategic partnership:Indo-Japan relations in a New-Asian era”.Comment.
b. Explain the role of culture and tradition in maintaining cordial bi-lateral ties.
2.Answer any two of the following in about 150 words each: 30
a. Discuss the impact on economic ties in case Pakistan grants MFN status to India.
b. Examine India’s apprehensions regarding misuse of technology for terror activities.Write in the context of recent happenings.
c. Acquaint with “String Of Pearls”.
3.Write brief notes on any four of the following in about 50 words each: 20
a. Indians in Obama administration
b. India’ s stand on attack on Gaza aid flotilla against Israel
c. Indians in Australia
d. Significance of Indian Rupee amongst other symbolic currencies.
e. Contribution of Indians in the field of Science and Technology
4.Answer any two of the following in about 100 words each: 20
a. Critically examine how far SAARC has succeeded in achieving its goal in an span of 25 years of its existence?
b. Assess the extent to which Foreign Educational Institutions (Regulation of Entry and Operation),Bill,2010 passed by the Cabinet recently would help in improving the status of Higher Education in the country?
c. Comment on India’s strategic interest in the African continent.
5.Answer any one of the following in about 100 words: 10
a.India and the Financial Action Task Force
b.Pros and cons of 100% FDI in Defence Sector in Indi
Elderly Observation 2
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Solar PV
When we went to Yishun to interview the elderly, some of them shouted at us and asked us to leave them alone and for us to mind our own business as I think their children/grandchildren might have treated them very badly and kicked them out of the house due to their many needs for their daily life
Catch the light, trap the heat
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Solar PV
A new type of device that uses both heat and light from the sun should be more efficient than conventional solar cells, which convert only the light into electricity.
The device relies on a physical principle discovered and demonstrated by researchers at Stanford University. In their prototype, the energy in sunlight excites electrons in an electrode, and heat from the sun coaxes the excited electrons to jump across a vacuum into another electrode, generating an electrical current. The device could be designed to send waste heat to a steam engine and convert 50 percent of the energy in sunlight into electricity--a huge improvement over conventional solar cells.
The most common silicon solar cells convert about 15 percent of the energy in sunlight into electricity. More than half of the incoming solar energy is lost as heat. That's because the active materials in solar cells can interact with only a particular band of the solar spectrum; photons below a certain energy level simply heat up the cell.
Stanford's Nicholas Melosh was inspired by highly efficient cogeneration systems that use the expansion of burning gas to drive a turbine and the heat from the combustion to power a steam engine. But thermal energy converters don't pair well with conventional solar devices. Solar cells, by contrast, get less efficient as they heat up.
The breakthrough came when the Stanford researchers realized that the light in solar radiation could enhance energy conversion in a different type of device, called a thermionic energy converter, that's conventionally driven solely by heat
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