Sir Mokshagundam Vishveshvaraya

Sir Mokshagundam Vishveshwariah (15 September 1860 – 14 April 1962) was a notable Indian engineer, scholar, statesman and the Diwan of Mysore during 1912 to 1918. He was a recipient of the Indian Republic's highest honour, the Bharat Ratna, in 1955. He was knighted as a Knight Commander of the Indian Empire (KCIE) by King George V for his contributions to the public good. Every year, 15 September is celebrated as Engineer's Day in India in his memory. He is held in high regard as a pre-eminent engineer of India. He was the chief designer of the flood protection system for the city of Hyderabad, now capital city of Andhra Pradesh, as well as the chief engineer responsible for the construction of the Krishna Raja Sagara dam in Mandya.

Early years

Sir MV was born in 1860 September 15 in a Telugu Brahmin family to Mokshagundam Srinivasa Shastry and Venkatalakshmamma in Muddenahalli village, 40 miles from Bangalore, Mysore State (now Karnataka), India. Mokshagundam is a village in Prakasam District's Cumbum Tahasil (then Kurnool District ) of Andhra Pradesh where the ancestors of Visvesvarayya emigrated from. Visvesvaraya lost his father at the age of 15. He enrolled for kannada medium primary school in Chikballapur and attended high school in Bangalore. He earned his Bachelor of Arts from Central College, Bangalore affiliated to Madras University in 1881 and later studied civil engineering at the prestigious College of Engineering, Pune, popularly known as COEP.

African Elephant

African elephants are the elephants of the genus Loxodonta (Greek for 'oblique-sided tooth'), consisting of two extant species: the African bush elephant and the smaller African forest elephant. Loxodonta is one of the two existing genera in the family Elephantidae.

Fossil members of Loxodonta have been found only in Africa, where they developed in the middle Pliocene.

One of the species of African elephant, the bush elephant, is the largest living terrestrial animal, while the forest elephant is the third largest. Their thickset bodies rest on stocky legs, and they have concave backs. Their large ears enable heat loss. The upper lip and nose form a trunk. The trunk acts as a fifth limb, a sound amplifier and an important method of touch. African elephants' trunks end in two opposing lips, whereas the Asian elephant trunk ends in a single lip. In L. africana, males stand 3.2–4.0 m (10–13 ft) tall at the shoulder and weigh 4,700–6,048 kg (10,360–13,330 lb), while females stand 2.2–2.6 m (7–9 ft) tall and weigh 2,160–3,232 kg (4,762–7,125 lb); L. cyclotis is smaller with male shoulder heights of up to 2.5 m (8 ft).

The largest recorded individual stood four metres (13.1 ft) to the shoulders and weighed 10 tonnes (10 long tons; 11 short tons).

Teeth

Elephants have four molars; each weighs about 5 kg (11 lb) and measures about 30 cm (12 in) long. As the front pair wears down and drops out in pieces, the back pair shifts forward, and two new molars emerge in the back of the mouth. Elephants replace their teeth four to six times. At about 40 to 60 years of age, the elephant no longer has teeth and will likely die of starvation, a common cause of death. The enamel plates of the molars are fewer in number than in Asian elephants.

Great White Shark

The great white shark (Carcharodon carcharias), also known as the great white, white pointer, white shark, or white death, is a species of large lamniform shark which can be found in the coastal surface waters of all the major oceans. The great white shark is mainly known for its size, with mature individuals growing up to 6.4 m (21 ft) in length (although reports have been published of great white sharks measuring over 8 m (26 ft), and 3,324 kg (7,330 lb) in weight). This shark reaches its maturity around 15 years of age and was previously believed to have a life span of over 30 years. The true lifespan of Great white sharks is far longer; now estimated to be as long as 70 years or more, making it one of the longest lived cartilaginous fish currently known.  Great white sharks can accelerate to speeds that exceed 56 km/h (35 mph).

The great white shark is an apex predator of the seas and has no natural predators. The great white shark is arguably the world's largest known extant macropredatory fish, and is one of the primary predators of marine mammals. It is also known to prey upon a variety of other marine animals, including fish and seabirds. It is the only known surviving species of its genus Carcharodon, and is ranked first in having the most attacks on humans. The IUCN list the great white shark as a vulnerable species, while it is included in Appendix II of CITES.

The bestselling novel Jaws by Peter Benchley and the subsequent blockbuster film by Steven Spielberg depicted the great white shark as a "ferocious man eater". In reality, humans are not the preferred prey of the great white shark, however of all shark species, the great white shark is responsible for by far the largest number of fatal unprovoked attacks on humans.

Polar Bear

The polar bear (Ursus maritimus) is a carnivorous bear whose native range lies largely within the Arctic Circle, encompassing the Arctic Ocean, its surrounding seas and surrounding land masses. It is a large bear, approximately the same size as the omnivorous Kodiak bear (Ursus arctos middendorffi). A boar (adult male) weighs around 350–700 kg (770–1,540 lb), while a sow (adult female) is about half that size. Although it is the sister species of the brown bear, it has evolved to occupy a narrower ecological niche, with many body characteristics adapted for cold temperatures, for moving across snow, ice, and open water, and for hunting the seals which make up most of its diet.Although most polar bears are born on land, they spend most of their time at sea. Their scientific name means "maritime bear", and derives from this fact. Polar bears hunt their preferred food of seals from the edge of sea ice, often living off fat reserves when no sea ice is present.

The polar bear is classified as a vulnerable species, with eight of the nineteen polar bear subpopulations in decline. For decades, large scale hunting raised international concern for the future of the species but populations rebounded after controls and quotas began to take effect. For thousands of years, the polar bear has been a key figure in the material, spiritual, and cultural life of Arctic indigenous peoples, and polar bears remain important in their cultures.

Cape Buffalo

The African buffalo or Cape buffalo (Syncerus caffer), is a large African bovine.

It is not closely related to the slightly larger wild Asian water buffalo, and its ancestry remains unclear. The African buffalo is not the ancestor of domestic cattle, and is only distantly related to other larger bovines. Owing to its unpredictable nature, which makes it highly dangerous to humans, the African buffalo has never been domesticated unlike its Asian counterpart, the Asian buffalo.

The African buffalo is a very robust species. Its shoulder height can range from 1 to 1.7 m (3.3 to 5.6 ft) and its head-and-body length can range from 1.7 to 3.4 m (5.6 to 11 ft). Compared with other large bovids, it has a long but stocky body (the body length can exceed the wild water buffalo, which is rather heavier and taller) and short but thickset legs, resulting in a relatively short standing height. The tail can range from 70 to 110 cm (28 to 43 in) long. Savannah-type buffaloes weigh 500 to 900 kg (1,100 to 2,000 lb), with males normally larger than females, reaching the upper weight range. In comparison, forest-type buffaloes, at 250 to 450 kg (600 to 1,000 lb), are only half that size. Its head is carried low; its top is located below the backline. The front hooves of the buffalo are wider than the rear, which is associated with the need to support the weight of the front part of the body, which is heavier and more powerful than the back.

Savannah-type buffaloes have black or dark brown coats with age. Old bulls have whitish circles around their eyes. Females tend to have more-reddish coats. Forest-type buffaloes are reddish brown in colour with horns that curve back and slightly up. Calves of both types have red coats.

Komodo Dragon

The Komodo dragon, also known as the Komodo monitor, is a large species of lizard found in the Indonesian islands of Komodo, Rinca, Flores, Gili Motang, and Padar. A member of the monitor lizard family (Varanidae), it is the largest living species of lizard, growing to a maximum length of 3 metres (10 ft) in rare cases and weighing up to approximately 70 kilograms (150 lb).

Their unusually large size has been attributed to island gigantism, since no other carnivorous animals fill the niche on the islands where they live. However, recent research suggests the large size of Komodo dragons may be better understood as representative of a relict population of very large varanid lizards that once lived across Indonesia and Australia, most of which, along with other megafauna, died out after the Pleistocene. Fossils very similar to V. komodoensis have been found in Australia dating to greater than 3.8 million years ago, and its body size remained stable on Flores, one of the handful of Indonesian islands where it is currently found, over the last 900,000 years, "a time marked by major faunal turnovers, extinction of the island's megafauna, and the arrival of early hominids by 880 ka."

As a result of their size, these lizards dominate the ecosystems in which they live. Komodo dragons hunt and ambush prey including invertebrates, birds, and mammals. It has been claimed that they have a venomous bite; there are two glands in the lower jaw which secrete several different toxic proteins. The biological significance of these proteins is disputed, but the glands have been shown to secrete an anticoagulant. Their group behaviour in hunting is exceptional in the reptile world. The diet of big Komodo dragons mainly consists of deer, though they also eat considerable amounts of carrion. Komodo dragons also occasionally attack humans in the area of West Manggarai Regency where they live in Indonesia.

Box Jellyfish

Box jellyfish (class Cubozoa) are cnidarian invertebrates distinguished by their cube-shaped medusae. Some species of box jellyfish produce extremely potent venom: Chironex fleckeri, Carukia barnesi and Malo kingi are among the most venomous creatures in the world. Stings from these and a few other species in the class are extremely painful and sometimes fatal to humans.

Box jellyfish most visibly differ from the Scyphozoan jellyfish in that they are umbrella shaped, rather than domed or crown-shaped. The underside of the umbrella includes a flap, or velarium, concentrating and increasing the flow of water expelled from the umbrella. As a result, box jellyfish can move more rapidly than other jellyfish. In fact, speeds of up to six meters per minute have been recorded.

The box jellyfish's nervous system is also more developed than that of many other jellyfish. Notably, they possess a nerve ring around the base of the umbrella that coordinates their pulsing movements; a feature found elsewhere only in the crown jellyfish. Whereas some other jellyfish do have simple pigment-cup ocelli, box jellyfish are unique in the possession of true eyes, complete with retinas, corneas and lenses. Their eyes are located on each of the four sides of their bell in clusters called rhopalia. This enables them to see specific points of light, as opposed to simply distinguishing between light and the dark. Box jellyfish also have 20 ocelli (simple eyes), that do not form images but detect light and dark; they therefore have a total of 24 eyes. A box jellyfish has the closest thing a known jellyfish has to a brain. Box jellyfish also display complex, probably visually guided behaviors such as obstacle avoidance and fast directional swimming. Tests have

Sloth

Sloths are medium-sized mammals belonging to the families Megalonychidae (two-toed sloth) and Bradypodidae (three-toed sloth), classified into six species. They are part of the order Pilosa and are therefore related to anteaters, which sport a similar set of specialized claws. Extant sloths are arboreal (tree dwelling) residents of the jungles of Central and South America, and are known for being slow-moving, and hence named "sloths". Extinct sloth species include many ground sloths.

Sloths make a good habitat for other organisms, and a single sloth may be home to moths, beetles, cockroaches, ciliates, fungi, and algae.

The sloth's taxonomic suborder is Folivora, while some call it Phyllophaga. Both names mean "leaf-eaters"; derived from Latin and Greek respectively. Names for the animals used by tribes in Ecuador include Ritto, Rit and Ridette, mostly forms of the word "sleep", "eat" and "dirty" from Tagaeri tribe of Huaorani.

Sun Bear

The sun bear (Helarctos malayanus) is a bear found in tropical forest habitats of Southeast Asia. It is classified as Vulnerable by IUCN as the large-scale deforestation that has occurred throughout Southeast Asia over the past three decades has dramatically reduced suitable habitat for the sun bear. It is suspected that the global population has declined by more than 30% over the past three bear generations.

The Malayan sun bear is also known as the "honey bear", which refers to its voracious appetite for honeycombs and honey.

The sun bear's fur is jet-black, short and sleek with some under-wool. There are two whirls on the shoulders, from where the hair radiates in all directions. There is a crest on the sides of the neck and a whorl in the centre of the breast patch. There is always a more or less crescent-shaped pale patch on the breast that varies individually in colour ranging from buff, cream or dirty white to ochreous. The skin is naked on the upper lip. The tongue is long and protrusible. The ears are small and rounded, broad at the base and capable of very little movement. The front legs are somewhat bowed with the paws turned inwards, and the claws are cream.

Frill-Necked lizard

The frill-necked lizard (Chlamydosaurus kingii), also known as the frilled lizard or frilled dragon, is found mainly in northern Australia and southern New Guinea. This species is the only member of the genus Chlamydosaurus. Its name comes from the large frill around its neck, which usually stays folded against the lizard's body. It is largely arboreal, spending the majority of the time in the trees. The lizard's diet consists mainly of insects and small vertebrates. The frill-necked lizard is a relatively large lizard, averaging 85 cm in length.

The frill-necked lizard is so called because of the large ruff of skin which usually lies folded back against its head and neck. The neck frill is supported by long spines of cartilage which are connected to the jaw bones. When the lizard is frightened, it produces a startling deimatic display: it gapes its mouth, exposing a bright pink or yellow lining; it spreads out its frill, displaying bright orange and red scales; raises its body; and sometimes holds its tail above its body. This reaction is used for territorial displays, to discourage predators, and during courtship.

Emperor Tamarin

The emperor tamarin, Saguinus imperator, is a species of tamarin allegedly named for its resemblance to the German emperor Wilhelm II. It lives in the southwest Amazon Basin, in east Peru, north Bolivia and in the west Brazilian states of Acre and Amazonas.

The fur of the emperor tamarin is predominantly grey colored, with yellowish speckles on its chest. The hands and feet are black and the tail is brown. Outstanding is its long, white mustache, which extends to both sides beyond the shoulders. The animal reaches a length of 23–26 centimetres (9–10 in), plus a 35–41.5 cm (14–16.3 in) long tail. It weighs approximately 500 grams (18 oz).

This primate inhabits tropical rain forests, living deep in the forest and also in open tree-covered areas. This diurnal species walks or runs quadrupedally through the forest, spending the majority of its days in the trees with quick, safe movements and broad jumps among the limbs.

Aye-Aye

The aye-aye (Daubentonia madagascariensis) is a lemur, a strepsirrhine primate native to Madagascar that combines rodent-like teeth and a special thin middle finger to fill the same ecological niche as a woodpecker.

It is the world's largest nocturnal primate, and is characterized by its unusual method of finding food; it taps on trees to find grubs, then gnaws holes in the wood using its forward slanting incisors to create a small hole in which it inserts its narrow middle finger to pull the grubs out. This foraging method is called percussive foraging. The only other animal species known to find food in this way is the striped possum. From an ecological point of view the aye-aye fills the niche of a woodpecker, as it is capable of penetrating wood to extract the invertebrates within.

The aye-aye is the only extant member of the genus Daubentonia and family Daubentoniidae (although it is currently classified as Near Threatened by the IUCN); a second species, Daubentonia robusta, appears to have become extinct at some point within the last 1000 years.

Angora Rabbit

The Angora rabbit is a variety of domestic rabbit bred for its long, soft wool. The Angora is one of the oldest types of domestic rabbit, originating in Ankara (historically known as Angora), Turkey, along with the Angora cat and Angora goat. The rabbits were popular pets with French royalty in the mid-18th century, and spread to other parts of Europe by the end of the century. They first appeared in the United States in the early 20th century. They are bred largely for their long Angora wool, which may be removed by shearing, combing, or plucking. There are many individual breeds of Angora rabbits, four of which are recognized by American Rabbit Breeders' Association (ARBA); they are English, French, Giant, and Satin. Other breeds include German, Chinese, Swiss, Finnish, Koren,and St.lucian.

Galileo Galilei

Galileo Galilei (15 February 1564 – 8 January 1642), was an Italian physicist, mathematician, astronomer, and philosopher who played a major role in the Scientific Revolution. His achievements include improvements to the telescope and consequent astronomical observations and support for Copernicanism. Galileo has been called the "father of modern observational astronomy", the "father of modern physics", the "father of science", and "the Father of Modern Science".

His contributions to observational astronomy include the telescopic confirmation of the phases of Venus, the discovery of the four largest satellites of Jupiter (named the Galilean moons in his honour), and the observation and analysis of sunspots. Galileo also worked in applied science and technology, inventing an improved military compass and other instruments.

Galileo's championing of heliocentrism was controversial within his lifetime, when most subscribed to either geocentrism or the Tychonic system. He met with opposition from astronomers, who doubted heliocentrism due to the absence of an observed stellar parallax. The matter was investigated by the Roman Inquisition in 1615, and they concluded that it could be supported as only a possibility, not an established fact. Galileo later defended his views in Dialogue Concerning the Two Chief World Systems, which appeared to attack Pope Urban VIII and thus alienated him and the Jesuits, who had both supported Galileo up until this point. He was tried by the Inquisition, found "vehemently suspect of heresy", forced to recant, and spent the rest of his life under house arrest. It was while Galileo was under house arrest that he wrote one of his finest works, Two New Sciences, in which he summarised the work he had done some forty years earlier, on the two sciences now called kinematics and strength of materials.

Nuclear Power Corporation of India Limited

The Nuclear Power Corporation of India Limited (NPCIL) is a government-owned corporation of India based in Mumbai. One of the public sector undertakings, it is wholly owned by the Union Government and is responsible for the generation of nuclear power for electricity. NPCIL is administered by the Department of Atomic Energy (DAE), part of the Ministry of Science and Technology. NPCIL is the only power utility company in India which uses nuclear fuel sources.

NPCIL was created in September 1987 as public limited company under the Companies Act 1956, "with the objective of undertaking the design, construction, operation and maintenance of the atomic power stations for generation of electricity in pursuance of the schemes and programmes of the Government of India under the provision of the Atomic Energy Act 1962." All nuclear power plants operated by the company are certified for ISO-14001 (Environment Management System).

NPCIL is the sole body responsible for constructing and operating India's commercial nuclear power plants. As of November 27, 2010 the company had 20 nuclear reactors in operation at six locations, a total installed capacity of 4780 MWe. Subsequent to the government's decision to allow private companies to provide nuclear power, the company has experienced problems with private enterprises "poaching" its employees.

NPCIL Plants

Homi Jehangir Bhabha

Homi Jehangir Bhabha, FRS (30 October 1909 – 24 January 1966) was an Indian nuclear physicist and the chief architect of the Indian atomic energy program. He was also responsible for the establishment of two well-known research institutions, namely the Tata Institute of Fundamental Research (TIFR), and the Atomic Energy Establishment at Trombay (which after Bhabha's death was renamed as the Bhabha Atomic Research Centre (BARC)). As a scientist, he is remembered for deriving a correct expression for the probability of scattering positrons by electrons, a process now known as Bhabha scattering.

Early life

Bhabha was born into a wealthy and prominent Parsi family, through which he was related to Dinshaw Maneckji Petit, Muhammad Ali Jinnah and Dorab Tata. He received his early education at Bombay's Cathedral Grammar School and entered Elphinstone College at age 15 after passing his Senior Cambridge Examination with Honors. He then attended the Royal Institute of Science until 1927 before joining Caius College of Cambridge University. This was due to the insistence of his father and his uncle Dorab Tata, who planned for Bhabha to obtain an engineering degree from Cambridge and then return to India, where he would join the Tata Iron and Steel Company in Jamshedpur.

Bhabha Atomic Research Centre

The Bhabha Atomic Research Centre (BARC) is India's primary nuclear research facility based in Mumbai. It has a number of nuclear reactors, all of which are used for India's nuclear power and research programme.

BARC was started in 1954, as the Atomic Energy Establishment, the Trombay (AEET), and became India's primary nuclear research centre, taking over charge of most nuclear scientists that were at the Tata Institute of Fundamental Research. After Homi J. Bhabha's death in 1966, the centre was renamed as the Bhabha Atomic Research Centre.

The first reactors at BARC and its affiliated power generation centres were imported from the west. India's first power reactors, installed at the Tarapur Atomic Power Plant (TAPP) were from the United States.

The primary importance of BARC is as a research centre. The BARC and the Indian government has consistently maintained that the reactors are used for this purpose only: Apsara (1956; named by the then Prime Minister of India, Jawaharlal Nehru when he likened the blue Cerenkov radiation to the beauty of the Apsaras (Indra's court dancers), CIRUS (1960; the "Canada-India Reactor" with assistance from Canada), the now-defunct ZERLINA (1961; Zero Energy Reactor for Lattice Investigations and Neutron Assay), Purnima I (1972), Purnima II (1984), Dhruva(1985), Purnima III (1990), and Kamini.

The plutonium used in India's 1974 nuclear test carried out in Pokhran in the Thar desert of Rajasthan (Peaceful Nuclear Explosion) came from CIRUS. The 1974 test (and the 1998 tests that followed) gave Indian scientists the technological know-how and confidence not only to develop nuclear fuel for future reactors to be used in power generation and research, but also the capacity to refine the same fuel into weapons-grade fuel to be used in the development of nuclear weapons.

BARC is also responsible for India's first PWR at Kalpakkam, a 80Mw land based prototype of INS Arihant's nuclear power unit, as well as the Arihant's power pack itself.

C. V. Raman

Sir Chandrasekhara Venkata Raman, FRS (7 November 1888 – 21 November 1970) was an Indian physicist whose work was influential in the growth of science in the world. He was the recipient of the Nobel Prize for Physics in 1930 for the discovery that when light traverses a transparent material, some of the light that is deflected changes in wavelength. This phenomenon is now called Raman scattering and is the result of the Raman effect.

Early years

Venkata Raman was born at Thiruvanaikaval, near Tiruchirappalli, Madras Presidency to R. Chandrasekhara Iyer (b. 1866) and Parvati Ammal (Saptarshi Parvati). He was the second of their eight children. At an early age, Raman moved to the city of Vizag, Andhra Pradesh. Studied in St.Aloysius Anglo-Indian High School. His father was a lecturer in Mathematics and physics, so he grew up in an academic atmosphere.

Raman entered Presidency College, Chennai in 1902. In 1904, he gained his B.Sc., winning the first place and the gold medal in physics. In 1907, he gained his M.Sc., obtaining the highest distinctions. He joined the Indian Finance Department as an Assistant Accountant General.

Vikram Sarabhai

Vikram Ambalal Sarabhai (August 12, 1919 – December 31, 1971) was an Indian physicist. He is considered to be the father of the Indian space program.

Biography

Early years and education

Vikram ambalal Sarabhai was born on 12 August 1919 in the city of Ahmedabad , Gujarat State in western India. The Sarabhai family was an important and rich Jain business family. His father Ambalal Sarabhai was an affluent industrialist and owned many mills in Gujarat. Vikram Sarabhai was one of the eight children of Ambalal and Sarla Devi.

To educate her eight children, Sarla Devi established a private school on the lines of the Montessori method, propounded by Maria Montessori, which was gaining fame at that time. As the Sarabhai family was involved in the Indian freedom struggle, many leaders of the freedom struggle like Mahatma Gandhi, Motilal Nehru, Rabindranath Tagore and Jawaharlal Nehru used to frequent the Sarabhai house. This is said to have greatly influenced the young Vikram Sarabhai and played an important role in the growth of his personality.

Prithvi Missile

Prithvi is a tactical surface-to-surface, short-range ballistic missile (SRBM) developed by DRDO of India under the Integrated Guided Missile Development Program.

Development and History

The Government of India launched the Integrated Guided Missile Development Program in 1983 to achieve self sufficiency in the development and production of wide range of Ballistic Missiles, Surface to Air Missiles etc.

Prithvi was the first missile to be developed under the Program. DRDO attempted to build Surface-to-air Missile under Project devil.

Variants make use of either liquid or both liquid and solid fuels. Developed as a battlefield missile, it could carry a nuclear warhead in its role as a tactical nuclear weapon.

Variants

The Prithvi missile project encompassed developing 3 variants for use by the Indian Army, Indian Air Force and the Indian Navy. The initial project framework of the Integrated Guided Missile Development Program outlines the variants in the following manner.

• Prithvi I (SS-150) - Army Version (150 km range with a payload of 1,000 kg)
• Prithvi II (SS-250) - Air Force Version (250 km range with a payload of 500 kg)
• Prithvi III (SS-350) - Naval Version (350 km range with a payload of 500 kg)
• Dhanush- Dhanush is reportedly a naval version of Prithvi which can be launched from Ships. Some sources claim that Dhanush is a System consisting of stabilization platform and missiles, which has the capability to launch both Prithvi II and Prithvi III from Ships while others report that Dhanush is a variant of Prithvi-II Ballistic Missile.