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Eskimo Yo-yo
An Eskimo yo-yo or Alaska yo-yo ( esu, yuuyuuk; ik, igruuraak) is a traditional two-balled skill toy played and performed by the Eskimo-speaking Alaska Natives, such as Inupiat, Siberian Yupik, and Yup'ik. It resembles fur-covered bolas and yo-yo. It is regarded as one of the most simple, yet most complex, cultural artifacts/toys in the world.Kiana, Chris (2004/2016). ''Original 100 Alaska Eskimo Yo-Yo Stratagems: Instructional Book''. Publication Consultants. ASIN: B007SNYM38. /. andKeynote Speaker: Christopher (Chris) J. Kiana, M.B.A., MA-RD, Ph.D., candidate, ''WCSpeakers.com'' (accessed: December 01 2016). The Eskimo yo-yo involves simultaneously swinging two sealskin balls suspended on caribou sinew strings in opposite directions with one hand. It is popular with Alaskans and tourists alike.Klistoff, Alysa J. (2007), Weapon, Toy, or Art? The Eskimo yo-yo as a commodified Arctic bola and marker of cultural Identity'. University of Alaska Fairbanks. . This traditional toy is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alaskan Yo-yo
An Eskimo yo-yo or Alaska yo-yo ( esu, yuuyuuk; ik, igruuraak) is a traditional two-balled skill toy played and performed by the Eskimo-speaking Alaska Natives, such as Inupiat, Siberian Yupik, and Yup'ik. It resembles fur-covered bolas and yo-yo. It is regarded as one of the most simple, yet most complex, cultural artifacts/toys in the world.Kiana, Chris (2004/2016). ''Original 100 Alaska Eskimo Yo-Yo Stratagems: Instructional Book''. Publication Consultants. ASIN: B007SNYM38. /. andKeynote Speaker: Christopher (Chris) J. Kiana, M.B.A., MA-RD, Ph.D., candidate, ''WCSpeakers.com'' (accessed: December 01 2016). The Eskimo yo-yo involves simultaneously swinging two sealskin balls suspended on caribou sinew strings in opposite directions with one hand. It is popular with Alaskans and tourists alike.Klistoff, Alysa J. (2007), Weapon, Toy, or Art? The Eskimo yo-yo as a commodified Arctic bola and marker of cultural Identity'. University of Alaska Fairbanks. . This traditional to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Centripetal Force
A centripetal force (from Latin ''centrum'', "center" and ''petere'', "to seek") is a force that makes a body follow a curved path. Its direction is always orthogonal to the motion of the body and towards the fixed point of the instantaneous center of curvature of the path. Isaac Newton described it as "a force by which bodies are drawn or impelled, or in any way tend, towards a point as to a centre". In Newtonian mechanics, gravity provides the centripetal force causing astronomical orbits. One common example involving centripetal force is the case in which a body moves with uniform speed along a circular path. The centripetal force is directed at right angles to the motion and also along the radius towards the centre of the circular path. The mathematical description was derived in 1659 by the Dutch physicist Christiaan Huygens. Formula The magnitude of the centripetal force on an object of mass ''m'' moving at tangential speed ''v'' along a path with radius of curvatu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Optical Rotation
Optical rotation, also known as polarization rotation or circular birefringence, is the rotation of the orientation of the plane of polarization about the optical axis of linearly polarized light as it travels through certain materials. Circular birefringence and circular dichroism are the manifestations of optical activity. Optical activity occurs only in chiral materials, those lacking microscopic mirror symmetry. Unlike other sources of birefringence which alter a beam's state of polarization, optical activity can be observed in fluids. This can include gases or solutions of chiral molecules such as sugars, molecules with helical secondary structure such as some proteins, and also chiral liquid crystals. It can also be observed in chiral solids such as certain crystals with a rotation between adjacent crystal planes (such as quartz) or metamaterials. When looking at the source of light, the rotation of the plane of polarization may be either to the right (dextrorotator ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maxwell's Top
A color triangle is an arrangement of colors within a triangle, based on the additive combination of three primary colors at its corners. An additive color space defined by three primary colors has a chromaticity gamut that is a color triangle, when the amounts of the primaries are constrained to be nonnegative. Before the theory of additive color was proposed by Thomas Young and further developed by James Clerk Maxwell and Hermann von Helmholtz, triangles were also used to organize colors, for example around a system of red, yellow, and blue primary colors. After the development of the CIE system, color triangles were used as chromaticity diagrams, including briefly with the trilinear coordinates representing the chromaticity values. Since the sum of the three chromaticity values has a fixed value, it suffices to depict only two of the three values, using Cartesian co-ordinates. In the modern ''x,y'' diagram, the large triangle bounded by the imaginary primaries X, Y, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spinning Top
A spinning top, or simply a top, is a toy with a squat body and a sharp point at the bottom, designed to be spun on its vertical axis, balancing on the tip due to the gyroscopic effect. Once set in motion, a top will usually wobble for a few seconds, spin upright for a while, then start to wobble again with increasing amplitude as it loses energy, and finally tip over and roll on its side. Tops exist in many variations and materials, chiefly wood, metal, and plastic, often with a metal tip. They may be set in motion by twirling a handle with the fingers, by pulling a rope coiled around the body, or by means of a built-in auger (spiral plunger). Such toys have been used since antiquity in solitary or competitive games, where each player tries to keep one's top spinning for as long as possible, or achieve some other goal. Some tops have faceted bodies with symbols or inscriptions, and are used like dice to inject randomness into games, or for divination and ritual purposes. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indian Arts And Crafts Act Of 1990
The Indian Arts and Crafts Act of 1990 (P.L. 101-644) is a truth-in-advertising law which prohibits misrepresentation in marketing of American Indian or Alaska Native arts and crafts products within the United States. It is illegal to offer or display for sale, or sell any art or craft product in a manner that falsely suggests it is Indian produced, an Indian product, or the product of a particular Indian or Indian Tribe or Indian arts and crafts organization, resident within the United States. For a first time violation of the Act, an individual can face civil or criminal penalties up to a $250,000 fine or a five-year prison term, or both. If a business violates the Act, it can face civil penalties or can be prosecuted and fined up to $1,000,000. The law covers all Indian and Indian-style traditional and contemporary arts and crafts produced after 1935. The Act broadly applies to the marketing of arts and crafts by any person in the United States. Some traditional items frequent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
China
China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and borders fourteen countries by land, the most of any country in the world, tied with Russia. Covering an area of approximately , it is the world's third largest country by total land area. The country consists of 22 provinces, five autonomous regions, four municipalities, and two Special Administrative Regions (Hong Kong and Macau). The national capital is Beijing, and the most populous city and financial center is Shanghai. Modern Chinese trace their origins to a cradle of civilization in the fertile basin of the Yellow River in the North China Plain. The semi-legendary Xia dynasty in the 21st century BCE and the well-attested Shang and Zhou dynasties developed a bureaucratic political system to serve hereditary monarchies, or dyna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alaska Native Art
Alaska Native cultures are rich and diverse, and their art forms are representations of their history, skills, tradition, adaptation, and nearly twenty thousand years of continuous life in some of the most remote places on earth. These art forms are largely unseen and unknown outside the state of Alaska, due to distance from the art markets of the world. History Historically, "art" as a decorative concept did not traditionally exist among these indigenous people. Objects were utilitarian, although decorated in ways that conveyed images of spiritual or physical activity. It was not until Europeans and Asians first made contact with the indigenous people of coastal Alaska in the 17th century that such non-utilitarian art objects began to be traded in exchange for metal implements, cloth, and foodstuffs such as tea, flour, or sugar. Many objects traded were valued for their functionality: clothing woven of grass, harpoon tips carved from the ivory tusk of the walrus; rainproof oute ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beadwork
Beadwork is the art or craft of attaching beads to one another by stringing them onto a thread or thin wire with a sewing or beading needle or sewing them to cloth. Beads are produced in a diverse range of materials, shapes, and sizes, and vary by the kind of art produced. Most often, beadwork is a form of personal adornment (e.g. jewelry), but it also commonly makes up other artworks. Beadwork techniques are broadly divided into several categories, including loom and off-loom weaving, stringing, bead embroidery, bead crochet, bead knitting, and bead tatting. Ancient beading The art of creating and utilizing beads is ancient, and ostrich shell beads discovered in Africa can be carbon-dated to 10,000 BC. Faience beads, a type of ceramic created by mixing powdered clays, lime, soda, and silica sand with water until a paste forms, then molding it around a stick or straw and firing until hard, were notably used in ancient Egyptian jewelry from the First Dynasty (beginning in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baleen
Baleen is a filter-feeding system inside the mouths of baleen whales. To use baleen, the whale first opens its mouth underwater to take in water. The whale then pushes the water out, and animals such as krill are filtered by the baleen and remain as a food source for the whale. Baleen is similar to bristles and consists of keratin, the same substance found in human fingernails, skin and hair. Baleen is a skin derivative. Some whales, such as the bowhead whale, have longer baleen than others. Other whales, such as the gray whale, only use one side of their baleen. These baleen bristles are arranged in plates across the upper jaw of whales. Depending on the species, a baleen plate can be long, and weigh up to . Its hairy fringes are called baleen hair or whalebone hair. They are also called baleen bristles, which in sei whales are highly calcified, with calcification functioning to increase their stiffness. Baleen plates are broader at the gumline (base). The plates have b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mukluks
Mukluks or kamik ( iu, ᑲᒥᒃ ) (singular: , plural: ) are a soft boot, traditionally made of reindeer (caribou) skin or sealskin, and worn by Arctic aboriginal people, including the Inuit, Iñupiat, and Yup'ik. Mukluks may be worn over an inner boot liner and under a protective overshoe. The term ''mukluk'' is often used for any soft boot designed for cold weather, and modern designs may use both traditional and modern materials. The word ''mukluk'' is of Yup'ik origin, from , the bearded seal, while ''kamik'' is an Inuit word. Related boots Soft-soled boots, of similar materials (mostly sealskin and caribou-skin) and designs, but with local variations, are traditionally worn in circumpolar areas. These include the North American Arctic, including Greenland, the European Arctic, including Fennoscandia, and Siberia. Another type of boot, sometimes called an Inuit boot, originating in Greenland and the eastern part of Alaska, is made by binding it with animal cartilage, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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