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National Institute Of Ocean Technology
The National Institute of Ocean Technology (NIOT) was established in November 1993 as an autonomous society under the Ministry of Earth Sciences in India. NIOT is managed by a Governing Council and is headed by a director. The institute is based in Chennai. The major aim of starting NIOT was to develop reliable indigenous technologies to solve various engineering problems associated with harvesting of non-living and living resources in India's exclusive economic zone, which is about two-thirds of the land area of India. Technology Groups Coastal and Environmental Engineering The group functions with a mandate to develop application-oriented technologies in ocean-related (Coastal & Environmental) areas. The goals of the group are to promote programs consistent with the overall development perspective of the country in the infrastructure sector thereby contributing to the nation building exercise. The group caters to specific sponsored-research and industrial sector projects by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Government Of India
The Government of India (ISO 15919, ISO: Bhārata Sarakāra, legally the Union Government or Union of India or the Central Government) is the national authority of the Republic of India, located in South Asia, consisting of States and union territories of India, 36 states and union territories. The government is led by the president of India (currently ) who largely exercises the executive powers, and selects the Prime Minister of India, prime minister of India and other ministers for aid and advice. Government has been formed by the The prime minister and their senior ministers belong to the Union Council of Ministers, its executive decision-making committee being the Cabinet (government), cabinet. The government, seated in New Delhi, has three primary branches: the legislature, the executive and the judiciary, whose powers are vested in bicameral Parliament of India, Union Council of Ministers (headed by prime minister), and the Supreme Court of India respectively, with a p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heat Exchanger
A heat exchanger is a system used to transfer heat between a source and a working fluid. Heat exchangers are used in both cooling and heating processes. The fluids may be separated by a solid wall to prevent mixing or they may be in direct contact. They are widely used in space heating, refrigeration, air conditioning, power stations, chemical plants, Petrochemical, petrochemical plants, Oil refinery, petroleum refineries, natural-gas processing, and sewage treatment. The classic example of a heat exchanger is found in an internal combustion engine in which a circulating fluid known as engine coolant flows through radiator coils and air flows past the coils, which cools the coolant and heats the incoming air. Another example is the heat sink, which is a passive heat exchanger that transfers the heat generated by an electronic or a mechanical device to a fluid medium, often air or a liquid coolant. Flow arrangement There are three primary classifications of heat exchangers accord ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1993 Establishments In Tamil Nadu
The General Assembly of the United Nations designated 1993 as: * International Year for the World's Indigenous People The year 1993 in the Kwajalein Atoll in the Marshall Islands had only 364 days, since its calendar advanced 24 hours to the Eastern Hemisphere side of the International Date Line, skipping August 21, 1993. Events January * January 1 ** Czechoslovakia ceases to exist, as the Czech Republic and Slovakia separate in the Dissolution of Czechoslovakia. ** The European Economic Community eliminates trade barriers and creates a European single market. ** International Radio and Television Organization ceases. * January 3 – In Moscow, Presidents George H. W. Bush (United States) and Boris Yeltsin (Russia) sign the second Strategic Arms Reduction Treaty. * January 5 ** US$7.4 million is stolen from the Brink's Armored Car Depot in Rochester, New York, in the fifth largest robbery in U.S. history. ** , a Liberian-registered oil tanker, runs aground ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scientific Organizations Established In 1993
Science is a systematic discipline that builds and organises knowledge in the form of testable hypotheses and predictions about the universe. Modern science is typically divided into twoor threemajor branches: the natural sciences, which study the physical world, and the social sciences, which study individuals and societies. While referred to as the formal sciences, the study of logic, mathematics, and theoretical computer science are typically regarded as separate because they rely on deductive reasoning instead of the scientific method as their main methodology. Meanwhile, applied sciences are disciplines that use scientific knowledge for practical purposes, such as engineering and medicine. The history of science spans the majority of the historical record, with the earliest identifiable predecessors to modern science dating to the Bronze Age in Egypt and Mesopotamia (). Their contributions to mathematics, astronomy, and medicine entered and shaped the Greek natural philo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prime Minister Of India
The prime minister of India (ISO 15919, ISO: ) is the head of government of the Republic of India. Executive authority is vested in the prime minister and his chosen Union Council of Ministers, Council of Ministers, despite the president of India being the nominal head of the executive. The prime minister has to be a member of one of the houses of bicameral Parliament of India, alongside heading the respective house. The prime minister and the cabinet are at all times responsible to the Lok Sabha. The prime minister is appointed by the president of India; however, the prime minister has to enjoy the confidence of the majority of Lok Sabha members, who are directly elected Elections in India#Parliamentary general elections (Lok Sabha), every five years, lest the prime minister shall resign. The prime minister can be a member of the Lok Sabha or the Rajya Sabha, the upper house of the parliament. The prime minister controls the selection and dismissal of members of the Union ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rajiv Gandhi
Rajiv Gandhi (20 August 1944 – 21 May 1991) was an Indian statesman and pilot who served as the prime minister of India from 1984 to 1989. He took office after the Assassination of Indira Gandhi, assassination of his mother, then–prime minister Indira Gandhi, to become at the age of 40 the youngest Indian prime minister. He served until his defeat at the 1989 Indian general election, 1989 election, and then became Leader of the Opposition, Lok Sabha, resigning in December 1990, six months before Assassination of Rajiv Gandhi, his own assassination. Gandhi was not related to Mahatma Gandhi. Instead, he was from the politically powerful Nehru–Gandhi family, which had been associated with the Indian National Congress party. For much of his childhood, his maternal grandfather Jawaharlal Nehru was prime minister. Gandhi attended The Doon School, an elite boarding institution, and then the University of Cambridge in the United Kingdom. He returned to India in 1966 and became ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salt Spray Test
The salt spray test (or salt fog test) is a standardized and popular corrosion test method, used to check corrosion resistance of materials and surface coatings. Usually, the materials to be tested are metallic (although stone, ceramics, and polymers may also be tested) and finished with a surface coating which is intended to provide a degree of corrosion protection to the underlying metal. Salt spray testing is an accelerated corrosion test that produces a corrosive attack to coated samples in order to evaluate (mostly comparatively) the suitability of the coating for use as a protective finish. The appearance of corrosion products (rust or other oxides) is evaluated after a predetermined period of time. Test duration depends on the corrosion resistance of the coating; generally, the more corrosion resistant the coating is, the longer the period of testing before the appearance of corrosion or rust. The salt spray test is one of the most widespread and long-established corrosion ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Helium Mass Spectrometer
A helium mass spectrometer is an instrument commonly used to detect and locate small leaks. It was initially developed in the Manhattan Project during World War II to find extremely small leaks in the Gaseous diffusion, gas diffusion process of enriched uranium, uranium enrichment plants. It typically uses a vacuum chamber in which a sealed container filled with helium is placed. Helium leaks out of the container, and the rate of the leak is detected by a mass spectrometer. Detection technique Helium is used as a Flow tracer, tracer because it penetrates small leaks rapidly. Helium also has the properties of being non-toxic, inert gas, chemically inert and present in the atmosphere only in minute quantities (5 parts per million, ppm). Typically a helium leak detector will be used to measure leaks in the range of 10 to 10 Pascal (unit), Pa·metre, m·second, s. A flow of 10 Pa·m·s is about 0.006 ml per minute at standard conditions for temperature and pressure (STP ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Underwater Acoustic Communication
Underwater acoustic communication is a technique of sending and receiving messages in water. There are several ways of employing such communication but the most common is by using hydrophones. Underwater communication is difficult due to factors such as multi-path propagation, time variations of the channel, small available bandwidth and strong signal attenuation, especially over long ranges. Compared to terrestrial communication, underwater communication has low data rates because it uses acoustic waves instead of electromagnetic waves. At the beginning of the 20th century some ships communicated by underwater bells as well as using the system for navigation. Submarine signals were at the time competitive with the primitive maritime radionavigation. The later Fessenden oscillator allowed communication with submarines. Types of modulation used for underwater acoustic communications In general the modulation methods developed for radio communications can be adapted for underwat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solar Desalination
Solar desalination is a desalination technique powered by solar energy. The two common methods are direct (thermal) and indirect (photovoltaic). History Solar distillation has been used for thousands of years. Early Greek mariners and Persian alchemists produced both freshwater and medicinal distillates. Solar stills were the first method used on a large scale to convert contaminated water into a potable form. In 1870 the first US patent was granted for a solar distillation device to Norman Wheeler and Walton Evans. Two years later in Las Salinas, Chile, Swedish engineer Charles Wilson began building a solar distillation plant to supply freshwater to workers at a saltpeter and silver mine. It operated continuously for 40 years and distilled an average of 22.7 m3 of water a day using the effluent from mining operations as its feed water. Solar desalination in the United States began in the early 1950s when Congress passed the Conversion of Saline Water Act, which led to the esta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chennai
Chennai, also known as Madras (List of renamed places in India#Tamil Nadu, its official name until 1996), is the capital city, capital and List of cities in Tamil Nadu by population, largest city of Tamil Nadu, the southernmost states and territories of India, state of India. It is located on the Coromandel Coast of the Bay of Bengal. According to the 2011 Census of India, 2011 Indian census, Chennai is the List of most populous cities in India, sixth-most-populous city in India and forms the List of million-plus urban agglomerations in India, fourth-most-populous urban agglomeration. Incorporated in 1688, the Greater Chennai Corporation is the oldest municipal corporation in India and the second oldest in the world after City of London Corporation, London. Historically, the region was part of the Chola dynasty, Chola, Pandya dynasty, Pandya, Pallava dynasty, Pallava and Vijayanagara Empire, Vijayanagara kingdoms during various eras. The coastal land which then contained th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marine Current Power
Marine currents can carry large amounts of water, largely driven by the tides, which are a consequence of the gravitational effects of the planetary motion of the Earth, the Moon and the Sun. Augmented flow velocities can be found where the underwater topography in straits between islands and the mainland or in shallows around headlands plays a major role in enhancing the flow velocities, resulting in appreciable kinetic energy. The Sun acts as the primary driving force, causing winds and temperature differences. Because there are only small fluctuations in current speed and stream location with minimal changes in direction, ocean currents may be suitable locations for deploying energy extraction devices such as turbines. Other effects such as regional differences in temperature and salinity and the Coriolis effect due to the rotation of the earth are also major influences. The kinetic energy of marine currents can be converted in much the same way that a wind turbine extracts ene ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
