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INFO: Full form for PSJ is Pharmaceutical Society of Jamaica in Academic & Science category
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INFO: Full form for PSJ is Pulliam School of Journalism in Academic & Science category
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Pittsburgh Life Sciences Greenhouse (PLSG) is an investment firm based in the South Side neighborhood of Pittsburgh, Pennsylvania that provides resources and tools to entrepreneurial life sciences enterprises in Pittsburgh and western Pennsylvania in order to advance research and patient care.

INFO: Full form for POK is Perspectives On Knowledge in Academic & Science category
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INFO: Full form for PGN is Parametar Group Numer in Academic & Science category
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A thermonuclear weapon, fusion weapon or hydrogen bomb (H bomb) is a second-generation nuclear weapon design. Its greater sophistication affords it vastly greater destructive power than first-generation atomic bombs, a more compact size, a lower mass or a combination of these benefits. Characteristics of nuclear fusion reactions make possible the use of non-fissile depleted uranium as the weapon's main fuel, thus allowing more efficient use of scarce fissile material such as uranium-235 (235
U
) or plutonium-239 (239
Pu
).

Modern fusion weapons consist essentially of two main components: a nuclear fission primary stage (fueled by 235
U
or 239
Pu
) and a separate nuclear fusion secondary stage containing thermonuclear fuel: the heavy hydrogen isotopes deuterium and tritium, or in modern weapons lithium deuteride. For this reason, thermonuclear weapons are often colloquially called hydrogen bombs or H-bombs.

A fusion explosion begins with the detonation of the fission primary stage. Its temperature soars past approximately 100 million Kelvin, causing it to glow intensely with thermal X-rays. These X-rays flood the void (the "radiation channel" often filled with polystyrene foam) between the primary and secondary assemblies placed within an enclosure called a radiation case, which confines the X-ray energy and resists its outward pressure. The distance separating the two assemblies ensures that debris fragments from the fission primary (which move much slower than X-ray photons) cannot disassemble the secondary before the fusion explosion runs to completion.

The secondary fusion stage—consisting of outer pusher/tamper, fusion fuel filler and central plutonium spark plug—is imploded by the X-ray energy impinging on its pusher/tamper. This compresses the entire secondary stage and drives up the density of the plutonium spark plug. The density of the plutonium fuel rises to such an extent that the spark plug is driven into a supercritical state, and it begins a nuclear fission chain reaction. The fission products of this chain reaction heat the highly compressed, and thus super dense, thermonuclear fuel surrounding the spark plug to around 300 million Kelvin, igniting fusion reactions between fusion fuel nuclei. In modern weapons fueled by lithium deuteride, the fissioning plutonium spark plug also emits free neutrons which collide with lithium nuclei and supply the tritium component of the thermonuclear fuel.

The secondary's relatively massive tamper (which resists outward expansion as the explosion proceeds) also serves as a thermal barrier to keep the fusion fuel filler from becoming too hot, which would spoil the compression. If made of uranium, enriched uranium or plutonium, the tamper captures fast fusion neutrons and undergoes fission itself, increasing the overall explosive yield. Additionally, in most designs the radiation case is also constructed of a fissile material that undergoes fission driven by fast thermonuclear neutrons. Such bombs are classified as two stage weapons, and most current Teller–Ulam designs are such fission-fusion-fission weapons. Fast fission of the tamper and radiation case is the main contribution to the total yield and is the dominant process that produces radioactive fission product fallout.

The first full-scale thermonuclear test was carried out by the United States in 1952; the concept has since been employed by most of the world's nuclear powers in reference

INFO: Full form for HB is Hanging Beam in Academic & Science category
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The Hot Band may refer to:

INFO: Full form for HB is Hordeum Bulbosum in Academic & Science category
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INFO: Full form for HB is Humanities Building in Academic & Science category
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INFO: Full form for HB is Huygens Bernoulli in Academic & Science category
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INFO: Full form for HB is hard-back [book] in Academic & Science category
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The great white shark (Carcharodon carcharias), also known as the white shark, white pointer, or simply great white, is a species of large mackerel shark which can be found in the coastal surface waters of all the major oceans. It is notable for its size, with larger female individuals growing to 6.1 m (20 ft) in length and 1,905–2,268 kg (4,200–5,000 lb) in weight at maturity. However, most are smaller; males measure 3.4 to 4.0 m (11 to 13 ft), and females measure 4.6 to 4.9 m (15 to 16 ft) on average. According to a 2014 study, the lifespan of great white sharks is estimated to be as long as 70 years or more, well above previous estimates, making it one of the longest lived cartilaginous fishes currently known. According to the same study, male great white sharks take 26 years to reach sexual maturity, while the females take 33 years to be ready to produce offspring. Great white sharks can swim at speeds of 25 km/hr (16 mph) for short bursts and to depths of 1,200 m (3,900 ft).

The great white shark has no known natural predators other than, on very rare occasions, the killer whale. It is arguably the world's largest-known extant macropredatory fish, and is one of the primary predators of marine mammals, up to the size of large baleen whales. This shark 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 responsible for more recorded human bite incidents than any other shark.

The species faces numerous ecological challenges which has resulted in international protection. The IUCN lists the great white shark as a Vulnerable species, and it is included in Appendix II of CITES. It is also protected by several national governments, such as Australia (as of 2018).

The novel Jaws by Peter Benchley and its subsequent film adaptation by Steven Spielberg depicted the great white shark as a ferocious man-eater. Humans are not the preferred prey of the great white shark, but the great white is nevertheless responsible for the largest number of reported and identified fatal unprovoked shark attacks on humans although this happens very rarely (typically less than 10 times a year globally).

Due to their need to travel long distances for seasonal migration and extremely demanding diet, it is not logistically feasible to keep great white sharks in captivity; because of this, while attempts have been made to do so in the past, there are no known aquariums in the world believed to house a live specimen.

The George Wright Society (GWS) is a nonprofit association that promotes conservation of parks, protected and conserved areas, and cultural/historic sites worldwide. GWS also promotes other forms of place-based stewardship. Founded in 1980, GWS is named after George Meléndez Wright, the first scientist to work for the U.S. National Park Service and the initiator of the first systematic surveys of wildlife in U.S. national park units.

GWS members includes researchers, managers, administrators, educators, practitioners, and others who are interested in conservation.

GWS promotes professional research and resource stewardship across all the natural and cultural resource disciplines that are required for modern-day park management. GWS’s unique role is to foster interdisciplinary place-based conservation. Specialist organizations and subject-matter professional societies create essential knowledge. GWS operates one level up from that endeavor by bringing specialists together from across disciplines to look for interdisciplinary solutions to conservation problems.

INFO: Full form for GWS is General Writing and Speaking in Academic & Science category
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INFO: Full form for GWS is Society for Economics and Social Cybernetics in Academic & Science category
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INFO: Full form for GWS is Gesellschaft für Wirtschaft und Sozial-Kybernetik in Academic & Science category
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INFO: Full form for GWS is Gesellschaft f? Wirtschaft und Sozial-Kybernetik in Academic & Science category
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The Gulf of Alaska (Tlingit: Yéil T'ooch’) is an arm of the Pacific Ocean defined by the curve of the southern coast of Alaska, stretching from the Alaska Peninsula and Kodiak Island in the west to the Alexander Archipelago in the east, where Glacier Bay and the Inside Passage are found.

The Gulf shoreline is a combination of forest, mountain and a number of tidewater glaciers. Alaska's largest glaciers, the Malaspina Glacier and Bering Glacier, spill out onto the coastal line along the Gulf of Alaska. The coast is heavily indented with Cook Inlet and Prince William Sound, the two largest connected bodies of water. It includes Yakutat Bay and Cross Sound. Lituya Bay (a fjord north of Cross Sound, and south of Mount Fairweather) is the site of the largest recorded tsunami in history. It serves as a sheltered anchorage for fishing boats.