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Geology and Atmospheric Science

Super aircraft carrier INS Vikramaditya inducted into Indian Navy

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INS Vikramaditya was formally commissioned on 16 November, 2013 at a ceremony held at Severodvinsk, Russia.

INS Vikramaditya

INS Vikramaditya is a Kiev class aircraft carrier which was commissioned by Russian Navy in 1987 under the name Baku. It was later renamed as Admiral Gorshkov and last sailed in 1995 in Russia, before being offered to India. The ship has been renamed in honour of Vikramaditya, a legendary 1st century BC emperor of Ujjain, India, famed for his wisdom, valour and magnanimity.

INS Vikramaditya, the floating airfield has an overall length of about 284 meters and a maximum beam of about 60 meters, stretching as much as three football fields put together. Standing about 20 storeys tall from keel to the highest point, the sheer sight of this 44,500 tonne mega structure of steel is awe inspiring. The ship has a total of 22 decks. The ship has the ability to carry over 30 aircraft comprising an assortment of MiG 29K/Sea Harrier, Kamov 31, Kamov 28, Sea King, ALH-Dhruv and Chetak helicopters.
Source Link:http://tnpsc.wordpress.com/2013/11/17/super-aircraft-carrier-ins-vikramaditya-inducted-into-indian-navy/

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Last Updated on Sunday, 08 December 2013 13:40

Mars Orbiter Mission – ISRO

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PSLV-C25, in its twenty fifth flight, successfully launches Mars Orbiter Mission Spacecraft from SDSC SHAR Sriharikota.

ISRO - Mars MissionMars Orbiter Mission is India’s first interplanetary mission to planet Mars with an orbiter craft designed to orbit Mars in an elliptical orbit. The Mission is primarily technological mission considering the critical mission operations and stringent requirements on propulsion and other bus systems of spacecraft.

The Polar Satellite Launch Vehicle, usually known by its abbreviation PSLV is the first operational launch vehicle of ISRO. PSLV is capable of launching 1600 kg satellites in 620 km sun-synchronous polar orbit and 1050 kg satellite in geo-synchronous transfer orbit. The reliability rate of PSLV has been superb. There had been 24 continuously successful flights of PSLV, till November 2013.

Indian space programme driven by vision of Dr Vikram Sarabhai considered as the father of Indian Space Programme.

Source Link:http://tnpsc.wordpress.com/2013/11/06/mars-orbiter-mission-isro/
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Last Updated on Sunday, 17 November 2013 17:45

General Science – General Knowledge

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  • Dolly the sheep, born in 1997, was the first large animal to be cloned from an adult. A cell from a sheep (Dolly’s mother) was injected into an unfertilized sheep’s egg that had its nucleus removed. The two cells were fused using a spark of electricity. The new cell was placed in the womb of a third sheep where it grew into Dolly. Dolly has exactly the same genetic characters as her mother.
  • Thulasi (Ocimum sanctum) is a traditional medicinal plant effectively used for common cold.
  • Genes are made from a chemical called DNA. Each gene is one section of an enormously long DNA molecule. DNA is like a long ladder, twisted into a spiral. The rungs of the ladder carry coded information that body cells can use to make proteins.
  • A transformer is a device by which a low voltage in a circuit can be converted into a high voltage in a neighboring circuit or vice versa. The device is based on the principle of mutual induction between a pair of coils. It is suitable only for DNA Structurechanging alternating voltages.
  • Watson and Crick (1953) proposed a model for DNA structure. The structure composed of two right-handed helical polynucleotide chains that form a double helix around the same central axis.
  • X-rays were discovered first by W. Roentgen in the year 1895. As the nature of radiation was unknown at that time he called them X-rays. These rays are also called as Roentgen rays.
  • Radioactivity was discovered by Henry Becquerel in the year 1896. He found that uranium and some of its salts emit spontaneously some invisible penetrating radiations which affected the photographic plate. This phenomenon of spontaneous emission of highly penetrating radiations by heavy elements is called radio activity.
  • In 1939 Otto Hahn and Strassman in Germany bombarded uranium by neutrons. It exploded into two nearly equal fragments of lighter elements such as Barium and Krypton and enormous amount of energy. Since this process somewhat resembles fission of cells in biology this phenomenon of nuclear disintegration is called nuclear fission.

    Source Link:http://tnpsc.wordpress.com/2013/07/30/general-science-general-knowledge/
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Last Updated on Monday, 12 August 2013 02:36

IRNSS-1A (Indian Regional Navigational Satellite System-1A) Navigation Satellite

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The Indian Space Research Organisation (ISRO)’s PSLV in its twenty fourth flight (PSLV-C22) launched India’s first dedicated navigational satellite IRNSS-1A on July 01, 2013 close to midnight from the Satish Dhawan Space Centre in Sriharikota, Andhra Pradesh.

IRNSS-1A, the first of the seven satellites of the IRNSS constellation, carries a Navigation payload and a C-band ranging transponder. The satellite is being built at ISRO Satellite Centre, Bangalore. Dr.Nageswar Rao is the Project Director.

Indian Regional Navigation Satellite System (IRNSS) is an independent regional navigation satellite system. It is designed to provide position accuracy better than 10m over India and the region extending about 1500 kms around India. It will provide an accurate real time Position, Navigation and Time (PNT) services to users on a variety of platforms with 24×7 service availability under all weather conditions.

Source Link: http://tnpsc.wordpress.com/2013/07/03/irnss-1a-indian-regional-navigational-satellite-system-1a-navigation-satellite/

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Last Updated on Wednesday, 24 July 2013 22:15

The electric eel (Electrophorus electricus)

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The electric eel (Electrophorus electricus) is an electric fish, and the only species of the genus Electrophorus. It is capable of generating powerful electric shocks of up to 600 volts, which it uses for hunting and self-defense. A shock of this power can kill a human.Electric Eel

Electric eels inhabit fresh waters of the Amazon and Orinoco River basins in South America, in floodplains, swamps, creeks, small rivers, and coastal plains. They often live on muddy bottoms in calm or stagnant waters.

http://tnpsc.wordpress.com/2013/05/26/the-electric-eel-electrophorus-electricus/
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Last Updated on Wednesday, 12 June 2013 01:39
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