1.
Charles Francis Hall
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Charles Francis Hall was an American Arctic explorer. Little is known of Halls early life and he was born in the state of Vermont, but while he was still a child his family moved to Rochester, New Hampshire, where, as a boy, he was apprenticed to a blacksmith. In the 1840s he married and drifted westward, arriving in Cincinnati, Ohio, there he went into business making seals and engraving plates, and later began to publish two small newspapers, The Cincinnati Occasional and The Daily Press. He got as far as Baffin Island, where the George Henry was forced to winter over, the Inuit told Hall of surviving relics from Martin Frobishers mining venture at Frobisher Bay on Baffin Island. Hall soon travelled there to see them first-hand, drawing upon the assistance of his newly found Inuit guides Ebierbing. Hall also learned what he interpreted as evidence that members of Franklins lost expedition might still be alive. On his return to New York, Hall arranged for Harper Brothers to publish his account of the expedition Arctic Researches and it was edited by a British mariner and writer William Parker Snow, who was also obsessed with the fate of Franklin. The two men fell out, and amongst other things Parker Snow later claimed Hall had used his ideas for the search for Franklin without giving him due credit. During 1863 Hall planned an expedition to seek more clues on the fate of Franklin. Finally, in July 1864 a very much smaller expedition departed in the whaler Monticello, during this second expedition to King William Island, he found remains and artifacts from the Franklin expedition, and made more inquiries about their fate from natives living there. Hall eventually realized that the stories of survivors had become garbled and unreliable and he also became disillusioned with the Inuit by the discovery that the remnants of Franklins expedition had deliberately been left to starve. He failed to consider that it would have impossible for the local population to support such a large group of supernumeraries. Halls third expedition was of a different character. He received a grant of $50,000 from the U. S. Congress to command an expedition to the North Pole in the ship Polaris. The party of 25 also included Halls old friend Budington as sailing master, George Tyson as navigator, and Dr. Emil Bessels, the expedition was troubled from the start as the party split into rival factions. Halls authority over the expedition was resented by a portion of the party. Polaris sailed into Thank God Harbor on September 10,1871 and that fall, upon returning to the ship from a sledging expedition with an Inuit guide, Hall suddenly fell ill after drinking a cup of coffee. He collapsed in what was described as a fit, for the next week he suffered from vomiting and delirium, then seemed to improve for a few days
2.
Inuit
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Inuit are a group of culturally similar indigenous peoples inhabiting the Arctic regions of Greenland, Canada and Alaska. Inuit is a noun, the singular is Inuk. The Inuit languages are part of the Eskimo-Aleut family, Inuit Sign Language is a critically endangered language isolate spoken in Nunavut. In the United States and Canada, the term Eskimo was commonly used to describe the Inuit and Alaskas Yupik, however, Inuit is not accepted as a term for the Yupik, and Eskimo is the only term that includes Yupik, Iñupiat and Inuit. However, aboriginal peoples in Canada and Greenlandic Inuit view Eskimo as pejorative, in Canada, sections 25 and 35 of the Constitution Act of 1982 classified the Inuit as a distinctive group of Aboriginal Canadians who are not included under either the First Nations or the Métis. These areas are known in Inuktitut as the Inuit Nunangat, in the United States, the Iñupiat live primarily on the Alaska North Slope and on Little Diomede Island. The Greenlandic Inuit are descendants of migrations from Canada. In the 21st century they are citizens of Denmark, although not of the European Union, Inuit are the descendants of what anthropologists call the Thule culture, who emerged from western Alaska around 1000 CE. They had split from the related Aleut group about 4,000 years ago and from northeastern Siberian migrants, possibly related to the Chukchi language group and they spread eastwards across the Arctic. They displaced the related Dorset culture, the last major Paleo-Eskimo culture, Inuit legends speak of the Tuniit as giants, people who were taller and stronger than the Inuit. Less frequently, the legends refer to the Dorset as dwarfs, researchers believe that the Dorset culture lacked the dogs, larger weapons and other technologies of the Inuit society, which gave the latter an advantage. By 1300, Inuit migrants had reached west Greenland, where they settled, faced with population pressures from the Thule and other surrounding groups, such as the Algonquian and Siouan to the south, the Tuniit gradually receded. They were thought to have become extinct as a people by about 1400 or 1500. But, in the mid-1950s, researcher Henry B. Collins determined that, based on the ruins found at Native Point, the Sadlermiut population survived up until winter 1902–03, when exposure to new infectious diseases brought by contact with Europeans led to their extinction as a people. In the early 21st century, mitochondrial DNA research has supported the theory of continuity between the Tuniit and the Sadlermiut peoples and it also provided evidence that a population displacement did not occur within the Aleutian Islands between the Dorset and Thule transition. In contrast to other Tuniit populations, the Aleut and Sadlermiut benefited from both geographical isolation and their ability to adopt certain Thule technologies, in Canada and Greenland, Inuit circulated almost exclusively north of the Arctic tree line, the effective southern border of Inuit society. The most southern officially recognized Inuit community in the world is Rigolet in Nunatsiavut, south of Nunatsiavut, the descendants of the southern Labrador Inuit in NunatuKavut continued their traditional transhumant semi-nomadic way of life until the mid-1900s. The Nunatukavummuit people usually moved among islands and bays on a seasonal basis and they did not establish stationary communities
3.
Snow
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Snowstorms organize and develop by feeding on sources of atmospheric moisture and cold air. Snowflakes nucleate around particles in the atmosphere by attracting supercooled water droplets, snowflakes take on a variety of shapes, basic among these are platelets, needles, columns and rime. As snow accumulates into a snowpack, it may blow into drifts, over time, accumulated snow metamorphoses, by sintering, sublimation and freeze-thaw. Where the climate is cold enough for year-to-year accumulation, a glacier may form, otherwise, snow typically melts seasonally, causing runoff into streams and rivers and recharging groundwater. Major snow-prone areas include the regions, the upper half of the Northern Hemisphere and mountainous regions worldwide with sufficient moisture. In the Southern Hemisphere, snow is confined primarily to mountainous areas, Snow affects ecosystems, as well, by providing an insulating layer during winter under which plants and animals are able to survive the cold. Snow develops in clouds that themselves are part of a weather system. The physics of snow crystal development in clouds results from a set of variables that include moisture content. The resulting shapes of the falling and fallen crystals can be classified into a number of shapes and combinations. Occasionally, some plate-like, dendritic and stellar-shaped snowflakes can form under clear sky with a cold temperature inversion present. Two additional and locally productive sources of snow are lake-effect storms and elevation effects, miid-latitude cyclones are low pressure areas which are capable of producing anything from cloudiness and mild snow storms to heavy blizzards. During a hemispheres fall, winter, and spring, the atmosphere over continents can be cold enough through the depth of the troposphere to cause snowfall, in the Northern Hemisphere, the northern side of the low pressure area produces the most snow. For the southern mid-latitudes, the side of a cyclone that produces the most snow is the southern side, a cold front, the leading edge of a cooler mass of air, can produce frontal snowsqualls—an intense frontal convective line, when temperature is near freezing at the surface. The strong convection that develops has enough moisture to produce whiteout conditions at places which line passes over as the wind causes intense blowing snow. This type of snowsquall generally lasts less than 30 minutes at any point along its path, in cases where there is a large amount of vertical growth and mixing the squall may develop embedded cumulonimbus clouds resulting in lightning and thunder which is dubbed thundersnow. A warm front can produce snow for a period, as warm, moist air overrides below-freezing air, often, snow transitions to rain in the warm sector behind the front. The same effect occurs over bodies of salt water, when it is termed ocean-effect or bay-effect snow. The effect is enhanced when the air mass is uplifted by the orographic influence of higher elevations on the downwind shores
4.
Canada
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Canada is a country in the northern half of North America. Canadas border with the United States is the worlds longest binational land border, the majority of the country has a cold or severely cold winter climate, but southerly areas are warm in summer. Canada is sparsely populated, the majority of its territory being dominated by forest and tundra. It is highly urbanized with 82 per cent of the 35.15 million people concentrated in large and medium-sized cities, One third of the population lives in the three largest cities, Toronto, Montreal and Vancouver. Its capital is Ottawa, and other urban areas include Calgary, Edmonton, Quebec City, Winnipeg. Various aboriginal peoples had inhabited what is now Canada for thousands of years prior to European colonization. Pursuant to the British North America Act, on July 1,1867, the colonies of Canada, New Brunswick and this began an accretion of provinces and territories to the mostly self-governing Dominion to the present ten provinces and three territories forming modern Canada. With the Constitution Act 1982, Canada took over authority, removing the last remaining ties of legal dependence on the Parliament of the United Kingdom. Canada is a parliamentary democracy and a constitutional monarchy, with Queen Elizabeth II being the head of state. The country is officially bilingual at the federal level and it is one of the worlds most ethnically diverse and multicultural nations, the product of large-scale immigration from many other countries. Its advanced economy is the eleventh largest in the world, relying chiefly upon its abundant natural resources, Canadas long and complex relationship with the United States has had a significant impact on its economy and culture. Canada is a country and has the tenth highest nominal per capita income globally as well as the ninth highest ranking in the Human Development Index. It ranks among the highest in international measurements of government transparency, civil liberties, quality of life, economic freedom, Canada is an influential nation in the world, primarily due to its inclusive values, years of prosperity and stability, stable economy, and efficient military. While a variety of theories have been postulated for the origins of Canada. In 1535, indigenous inhabitants of the present-day Quebec City region used the word to direct French explorer Jacques Cartier to the village of Stadacona, from the 16th to the early 18th century Canada referred to the part of New France that lay along the St. Lawrence River. In 1791, the area became two British colonies called Upper Canada and Lower Canada collectively named The Canadas, until their union as the British Province of Canada in 1841. Upon Confederation in 1867, Canada was adopted as the name for the new country at the London Conference. The transition away from the use of Dominion was formally reflected in 1982 with the passage of the Canada Act, later that year, the name of national holiday was changed from Dominion Day to Canada Day
5.
Greenland
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Greenland is an autonomous constituent country within the Danish Realm between the Arctic and Atlantic Oceans, east of the Canadian Arctic Archipelago. Though physiographically a part of the continent of North America, Greenland has been politically and culturally associated with Europe for more than a millennium. The majority of its residents are Inuit, whose ancestors began migrating from the Canadian mainland in the 13th century, Greenland is the worlds largest island. Three-quarters of Greenland is covered by the permanent ice sheet outside Antarctica. With a population of about 56,480, it is the least densely populated country in the world, the Arctic Umiaq Line ferry acts as a lifeline for western Greenland, connecting the various cities and settlements. Greenland has been inhabited off and on for at least the last 4,500 years by Arctic peoples whose forebears migrated there from what is now Canada, Norsemen settled the uninhabited southern part of Greenland beginning in the 10th century, and Inuit peoples arrived in the 13th century. The Norse colonies disappeared in the late 15th century, soon after their demise, beginning in 1499, the Portuguese briefly explored and claimed the island, naming it Terra do Lavrador. In the early 18th century, Scandinavian explorers reached Greenland again, to strengthen trading and power, Denmark-Norway affirmed sovereignty over the island. Greenland was settled by Vikings more than a thousand years ago, Vikings set sail from Greenland and Iceland, discovering North America nearly 500 years before Columbus reached Caribbean islands. Though under continuous influence of Norway and Norwegians, Greenland was not formally under the Norwegian crown until 1262, the Kingdom of Norway was extensive and a military power until the mid-14th century. Thus, the two kingdoms resources were directed at creating Copenhagen, Norway became the weaker part and lost sovereignty over Greenland in 1814 when the union was dissolved. Greenland became a Danish colony in 1814, and was made a part of the Danish Realm in 1953 under the Constitution of Denmark, in 1973, Greenland joined the European Economic Community with Denmark. However, in a referendum in 1982, a majority of the population voted for Greenland to withdraw from the EEC which was effected in 1985, Greenland contains the worlds largest and most northernly national park, Northeast Greenland National Park. Greenland is divided into four municipalities - Sermersooq, Kujalleq, Qaasuitsup and it also retains control of monetary policy, providing an initial annual subsidy of DKK3.4 billion, which is planned to diminish gradually over time. Greenland expects to grow its economy based on increased income from the extraction of natural resources, the capital, Nuuk, held the 2016 Arctic Winter Games. At 70%, Greenland has one of the highest shares of renewable energy in the world, the early Viking settlers named the island as Greenland. In the Icelandic sagas, the Norwegian-born Icelander Erik the Red was said to be exiled from Iceland for manslaughter, along with his extended family and his thralls, he set out in ships to explore an icy land known to lie to the northwest. After finding an area and settling there, he named it Grœnland
6.
Thermal insulation
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Thermal insulation is the reduction of heat transfer between objects in thermal contact or in range of radiative influence. Thermal insulation can be achieved with specially engineered methods or processes, as well as with suitable object shapes, heat flow is an inevitable consequence of contact between objects of differing temperature. Thermal insulation provides a region of insulation in which thermal conduction is reduced or thermal radiation is reflected rather than absorbed by the lower-temperature body, the insulating capability of a material is measured with thermal conductivity. Low thermal conductivity is equivalent to high insulating capability, in thermal engineering, other important properties of insulating materials are product density and specific heat capacity. Solid materials chosen for insulation have a low thermal conductivity k, as the thickness of insulation is increased, the thermal resistance also increases. For insulated cylinders, a critical radius must be reached, before the critical radius is reached any added insulation increases heat transfer. If the outside radius of a cylinder is increased by applying insulation, however, at the same time, the convective resistance is reduced. This implies that adding insulation below a critical radius actually increases the heat transfer. If the radius of the cylinder is smaller than the critical radius for insulation. Gases possess poor thermal conduction properties compared to liquids and solids, in order to further augment the effectiveness of a gas it may be disrupted into small cells which cannot effectively transfer heat by natural convection. Convection involves a larger flow of gas driven by buoyancy and temperature differences. In order to accomplish gas cell formation in man-made thermal insulation, glass and this principle is used industrially in building and piping insulation such as, cellulose, rock wool, polystyrene foam, urethane foam, vermiculite, perlite, and cork. Trapping air is also the principle in all highly insulating clothing materials such as wool, down feathers, the air-trapping property is also the insulation principle employed by homeothermic animals to stay warm, for example down feathers, and insulating hair such as natural sheeps wool. In both cases the primary insulating material is air, and the used for trapping the air is natural keratin protein. Maintaining acceptable temperatures in buildings uses a proportion of global energy consumption. For a period of time, Asbestos was also used, however, when well insulated, a building, is energy-efficient, thus saving the owner money. Provides more uniform throughout the space. Unlike heating and cooling equipment, insulation is permanent and does not require maintenance, upkeep, lowers the carbon footprint of a building
7.
Driftwood
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Driftwood is wood that has been washed onto a shore or beach of a sea, lake, or river by the action of winds, tides or waves. It is a form of debris or tidewrack. In some waterfront areas, driftwood is a major nuisance, however, the driftwood provides shelter and food for birds, fish and other aquatic species as it floats in the ocean. Gribbles, shipworms and bacteria decompose the wood and gradually turn it into nutrients that are reintroduced to the food web, sometimes, the partially decomposed wood washes ashore, where it also shelters birds, plants, and other species. Driftwood can become the foundation for sand dunes, most driftwood is the remains of trees, in whole or part, that have been washed into the ocean, due to flooding, high winds, or other natural occurrences, or as the result of logging. There is also a subset of driftwood known as drift lumber, erosion and wave action may make it difficult or impossible to determine the origin of a particular piece of driftwood. Driftwood can be used as part of furniture or other art forms. The EPA includes driftwood in its list of Items You Should Never Burn in Your Appliance, because it will release toxic chemicals when burned. According to Norse mythology, the first humans, Ask and Embla, were formed out of two pieces of driftwood, an ash and an elm, by the god Odin and his brothers, Vili, the Vikings would cast wood into the sea before making landfall. And the location of the wood would be an indication as to where to build their mead halls, the wood used would found the high-seat pillars of the new hall. Traditional Inuit boats such as the kayak were fashioned from driftwood frames covered in skins, wood that is burned today in these regions mainly consists of the remains of condemned wooden structures. Driftwood is still used as kindling by some, the Old Man of the Lake in Crater Lake, Oregon is a full-size tree that has been bobbing vertically in the lake for more than a century. Due to the water of the lake, the tree has been well preserved. Alice Gray, the legendary Diana of the Dunes, who fought to preserve the Indiana Dunes which contain quantities of driftwood named her college Driftwood, and made all her furniture from driftwood. Driftwood Sculptures are sculptures that are made of driftwood on beaches or mudflats, At Kullaberg, Sweden and this sculpture and two others led to the declaration of Ladonia as an independent nation. Sculptures were created on the Emeryville, California mudflat and marsh area of San Francisco Bay in the late 1960s. A driftwood sculpture was constructed in the Chapelle St Anne d Arles by the visitors to the exhibition Marcher dans le pas des glaneurs organized by A Flots perdus, the Ashden Awards for Sustainable Energy are sculpted out of driftwood. Artist Deborah Butterfield is known for her sculptures of horses, initially rendered from driftwood before being cast in bronze, artist Melanie Klaas is well known for her driftwood big game fish sculptures such as marlin and tuna as seen in Marlin magazine and Large woody debris
8.
Igloolik
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Igloolik is an Inuit hamlet in Foxe Basin, Qikiqtaaluk Region in Nunavut, northern Canada. Because its location on Igloolik Island is close to Melville Peninsula, the name Igloolik means there is a house here. It derives from iglu, meaning house or building, and refers to the sod houses that were originally in the area, in Inuktitut The residents are called Iglulingmiut. The mayor of Igloolik is Joe Inooya, information about the area’s earliest inhabitants comes mainly from numerous archeological sites on the island, some dating back more than 4,000 years. First contact with Europeans came when British Navy ships HMS Fury and HMS Hecla, under the command of Captain William Edward Parry, the island was visited in 1867 and 1868 by the American explorer Charles Francis Hall in his search for survivors of the lost Franklin Expedition. The first permanent presence by southerners in Igloolik came with the establishment of a Roman Catholic Mission in the 1930s, by the end of the decade, the Hudsons Bay Company had also set up a post on the island. Non-indigenous establishments, such as RCMP stations, day schools, the Igloolik Research Centre focuses on documenting Inuit traditional knowledge and technology, as well as climatology and seismic data research. An ancient legend from the Igloolik area was adapted by Zacharias Kunuk into the award-winning Canadian film Atanarjuat, in 2004, Isuma produced the film The Journals of Knud Rasmussen which was released in September 2006 after premiering at the Toronto International Film Festival. Igloolik is also the home-base of the only Inuit circus, Artcirq and this collective is active in video-making, music production and live circus show performances. Early in 2008, when temperatures in Igloolik were at −50 °C, eight members of Artcirq went to Essakane north of Timbuktu, Mali, in February 2010, six members of Artcirq represented Nunavut in performances at the 2010 Olympic Winter Games in Vancouver, British Columbia. In late 2007, the Igloolik HTO banned all forms of tourism related to the northern Foxe Basin walrus population for a period of two years and this ban was in response to an observed decrease in walrus. The Igloolik Inuit continue to harvest walrus while the ban is in place. According to the 2016 census, the population of Igloolik was 1,682, a 15. 7% increase from the 2011 census. The growth of the Iglulingmiut,1464856808671,1741,2861,5381,4541,682 Igloolik has a climate with 9 months averaging below 0 °C. He called on Baffinland to find a shipping route to the mine. Paul Quassa, Former Mayor of Igloolik, also expressed concern and he said the region was known for its highly prized aged, fermented walrus meat, a valuable export from the region. On November 2,2016, CBC News reported that residents were describing a hum or buzz, coming from deep within the Fury and Hecla Strait—near Steensby Inlet where Baffinland has one of its ports. Paul Quassa, Iglooliks representative to the Legislative Assembly of Nunavut, the hum is very loud, so loud the complement of vessels transiting the straits can hear it transmitted through the hulls, without any electronic aids
9.
Sea ice
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Sea ice arises as seawater freezes. Because ice is less dense water, it floats on the oceans surface. Sea ice covers about 7% of the Earth’s surface and about 12% of the world’s oceans. Much of the sea ice is enclosed within the polar ice packs in the Earths polar regions, the Arctic ice pack of the Arctic Ocean. Polar packs undergo a significant yearly cycling in surface extent, a natural process upon which depends the Arctic ecology, due to the action of winds, currents and temperature fluctuations, sea ice is very dynamic, leading to a wide variety of ice types and features. Sea ice may be contrasted with icebergs, which are chunks of ice shelves or glaciers that calve into the ocean, depending on location, sea ice expanses may also incorporate icebergs. Sea ice does not simply grow and melt, during its lifespan, it is very dynamic. Due to the action of winds, currents, water temperature. Sea ice is classified according to whether or not it is able to drift, Sea ice can be classified according to whether or not it is attached to the shoreline. If attached, it is called landfast ice, or more often, alternatively, and unlike fast ice, drift ice occurs further offshore in very wide areas, and encompasses ice that is free to move with currents and winds. The physical boundary between fast ice and drift ice is the fast ice boundary, the drift ice zone may be further divided into a shear zone, a marginal ice zone and a central pack. Drift ice consists of floes, individual pieces of sea ice 20 metres or more across, the term pack ice is used either as a synonym to drift ice, or to designate drift ice zone in which the floes are densely packed. The overall sea ice cover is termed the ice canopy from the perspective of submarine navigation, another classification used by scientists to describe sea ice is based on age, that is, on its development stages. These stages are, new ice, nilas, young ice, first-year, new ice is a general term used for recently frozen sea water that does not yet make up solid ice. It may consist of ice, slush, or shuga. Other terms, such as ice and pancake ice, are used for ice crystal accumulations under the action of wind. Nilas designates a sea ice crust up to 10 centimetres in thickness and it bends without breaking around waves and swells. Nilas can be subdivided into dark nilas – up to 5 centimetres in thickness and very dark
10.
Family
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In the context of human society, a family is a group of people affiliated either by consanguinity, affinity, or co-residence or some combination of these. Members of the family may include spouses, parents, brothers, sisters, sons. Members of the family may include grandparents, aunts, uncles, cousins, nephews, nieces. Sometimes these are considered members of the immediate family, depending on an individuals specific relationship with them. In most societies, the family is the institution for the socialization of children. As the basic unit for raising children, anthropologists generally classify most family organizations as matrifocal, conjugal, avuncular, sexual relations among the members are regulated by rules concerning incest such as the incest taboo. The word family can be used metaphorically to create more inclusive categories such as community, nationhood, global village, the field of genealogy aims to trace family lineages through history. Family is also an important economic unit studied in family economics, one of the primary functions of the family involves providing a framework for the production and reproduction of persons, biologically and/or socially. This can occur through the sharing of material substances, the giving and receiving of care and nurture, jural rights and obligations, thus, ones experience of ones family shifts over time. From the perspective of children, the family is a family of orientation, from the point of view of the parent, the family is a family of procreation, the goal of which is to produce and enculturate and socialize children. Christopher Harris notes that the conception of family is ambiguous. Diverse data from ethnography, history, law and social statistics, reveal the human family as a social institution, the different types of families occur in a wide variety of settings, and their specific functions and meanings depend largely on their relationship to other social institutions. Sociologists have a special interest in the function and status of family forms in stratified societies, much sociological, historical and anthropological research dedicates itself to the understanding of this variation, and of changes in the family that form over time. Levitan claims, Times have changed, it is acceptable and encouraged for mothers to work. The way roles are balanced between the parents will help children grow and learn life lessons. There is great importance of communication and equality in families, in order to avoid role strain, the term nuclear family is commonly used, especially in the United States of America, to refer to conjugal families. A conjugal family includes only the husband, the wife, sociologists distinguish between conjugal families and nuclear families. Other family structures, such as blended parents, single parents, a matrifocal family consists of a mother and her children
11.
Village
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A village is a clustered human settlement or community, larger than a hamlet but smaller than a town, with a population ranging from a few hundred to a few thousand. Though often located in areas, the term urban village is also applied to certain urban neighbourhoods. Villages are normally permanent, with fixed dwellings, however, transient villages can occur, further, the dwellings of a village are fairly close to one another, not scattered broadly over the landscape, as a dispersed settlement. In the past, villages were a form of community for societies that practise subsistence agriculture. In Great Britain, a hamlet earned the right to be called a village when it built a church, in many cultures, towns and cities were few, with only a small proportion of the population living in them. The Industrial Revolution attracted people in numbers to work in mills and factories. This also enabled specialization of labor and crafts, and development of many trades, the trend of urbanization continues, though not always in connection with industrialization. Although many patterns of life have existed, the typical village was small. Homes were situated together for sociability and defence, and land surrounding the living quarters was farmed, Traditional fishing villages were based on artisan fishing and located adjacent to fishing grounds. The soul of India lives in its villages, declared M. K. Gandhi at the beginning of 20th century, according to the 2011 census of India,68. 84% of Indians live in 640,867 different villages. The size of these villages varies considerably,236,004 Indian villages have a population of fewer than 500, while 3,976 villages have a population of 10, 000+. Most of the villages have their own temple, mosque, or church, auyl is a Kazakh word meaning village in Kazakhstan. According to the 2009 census of Kazakhstan,42. 7% of Kazakhs live in 8172 different villages, to refer to this concept along with the word auyl often used the slavic word selo in Northern Kazakhstan. Peoples Republic of China In mainland China, villages 村 are divisions under township Zh, 乡 or town Zh, Republic of China In the Republic of China, villages are divisions under townships or county-controlled cities. The village is called a tsuen or cūn under a rural township, japan South Korea In Indonesia, depending on the principles they are administered, villages are called Kampung or Desa. A Desa is administered according to traditions and customary law, while a kelurahan is administered along more modern principles, Desa are generally located in rural areas while kelurahan are generally urban subdivisions. A village head is respectively called kepala desa or lurah, both are elected by the local community. A desa or kelurahan is the subdivision of a kecamatan, in turn the subdivision of a kabupaten or kota, the same general concept applies all over Indonesia
12.
Paraboloid
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In geometry, a paraboloid is a quadric surface that has one axis of symmetry and no center of symmetry. The term paraboloid is derived from parabola, which refers to a section that has the same property of symmetry. In a suitable coordinate system with three axes x, y, and z, it can be represented by the equation z = x 2 a 2 + y 2 b 2. Where a and b are constants that dictate the level of curvature in the xz, in this position, the elliptic paraboloid opens upward. A hyperbolic paraboloid is a ruled surface shaped like a saddle. In a suitable system, a hyperbolic paraboloid can be represented by the equation z = y 2 b 2 − x 2 a 2. In this position, the hyperbolic paraboloid opens down along the x-axis, obviously both the paraboloids contain a lot of parabolas. But there are differences, too, an elliptic paraboloid contains ellipses. With a = b an elliptic paraboloid is a paraboloid of revolution and this shape is also called a circular paraboloid. This also works the way around, a parallel beam of light incident on the paraboloid parallel to its axis is concentrated at the focal point. This applies also for other waves, hence parabolic antennas, for a geometrical proof, click here. The hyperbolic paraboloid is a ruled surface, it contains two families of mutually skew lines. The lines in each family are parallel to a common plane, hence the hyperbolic paraboloid is a conoid. This property makes easy to realize a hyperbolic paraboloid with concrete, the widely sold fried snack food Pringles potato crisps resemble a truncated hyperbolic paraboloid. The distinctive shape of these allows them to be stacked in sturdy tubular containers. Examples in architecture St. a point, if the plane is a tangent plane, remark, an elliptic paraboloid is projectively equivalent to a sphere. Remarks, A hyperbolic paraboloid is a surface, but not developable. The Gauss curvature at any point is negative, hence it is a saddle surface
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