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Sheaf Cohomology Group , a wheel or roller with a groove along its edge for holding a belt, rope or cable
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Sheaf may refer to: * Sheaf (agriculture), a bundle of harvested cereal stems * Sheaf (mathematics), a mathematical tool * Sheaf toss, a Scottish sport * River Sheaf, a tributary of River Don in England * ''The Sheaf'', a student-run newspaper serving the University of Saskatchewan * Aluma, a settlement in Israel whose name translates as ''Sheaf'' See also * Sceafa, a king of English legend * Sheath (other) * Sheave Sheave without a rope A pulley is a wheel on an axle or shaft enabling a taut cable or belt passing over the wheel to move and change direction, or transfer power between itself and a shaft. A pulley may have a groove or grooves between flan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Sheaf (agriculture)
A sheaf (; : sheaves) is a bunch of cereal-crop stems bound together after reaping, traditionally by sickle, later by scythe or, after its introduction in 1872, by a mechanical reaper-binder. Traditional hand-reapers, using scythes and working as a team, cut a field of grain clockwise, starting from an outside edge and finishing in the middle. Scything leaves a windrow of cut stems to the left of the reaper and, if cut skillfully, leaves the seed heads more or less aligned. These are then picked up and tied into sheaves by the sheavers, who traditionally use other cut stems as ties. These sheavers, or a following team, then stand the sheaves up in stooks to dry. Three to eight sheaves make up each stook, which forms a self-supporting A-frame with the grain-heads meeting at the top. This keeps the grain well ventilated, and off the ground allowing it to dry and discouraging vermin. The drying sheaves are later either placed by hand or pitched onto a cart. The traditional s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Sheaf (mathematics)
In mathematics, a sheaf (: sheaves) is a tool for systematically tracking data (such as sets, abelian groups, rings) attached to the open sets of a topological space and defined locally with regard to them. For example, for each open set, the data could be the ring of continuous functions defined on that open set. Such data are well-behaved in that they can be restricted to smaller open sets, and also the data assigned to an open set are equivalent to all collections of compatible data assigned to collections of smaller open sets covering the original open set (intuitively, every datum is the sum of its constituent data). The field of mathematics that studies sheaves is called sheaf theory. Sheaves are understood conceptually as general and abstract objects. Their precise definition is rather technical. They are specifically defined as sheaves of sets or as sheaves of rings, for example, depending on the type of data assigned to the open sets. There are also maps (or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Sheaf Toss
Sheaf may refer to: * Sheaf (agriculture), a bundle of harvested cereal stems * Sheaf (mathematics) In mathematics, a sheaf (: sheaves) is a tool for systematically tracking data (such as sets, abelian groups, rings) attached to the open sets of a topological space and defined locally with regard to them. For example, for each open set, the ..., a mathematical tool * Sheaf toss, a Scottish sport * River Sheaf, a tributary of River Don in England * '' The Sheaf'', a student-run newspaper serving the University of Saskatchewan * Aluma, a settlement in Israel whose name translates as ''Sheaf'' See also * Sceafa, a king of English legend * Sheath (other) * Sheave, a wheel or roller with a groove along its edge for holding a belt, rope or cable {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
River Sheaf
The River Sheaf in Sheffield, South Yorkshire, England, flows northwards, past Dore, through Abbeydale and north of Heeley. It then passes into a culvert, through which it flows under the centre of Sheffield before joining the River Don. This lower section of the River Sheaf, together with the Don between the Blonk Street and Lady's Bridges, formed two sides of the boundary of Sheffield Castle. The main tributaries of the Sheaf are the Porter Brook, which joins it beneath Sheffield Midland station, and the Meers Brook. The river has been polluted upstream through centuries of industrial activity, including iron and steel working, and is only slowly recovering. The river used to provide the power for metal works such as the Grade I-listed Abbeydale Industrial Hamlet. A River Sheaf Walk has been developed which follows the river from Granville Square out to Millhouses Park and beyond to the Peak District. Name Until the 17th century the name ''Sheaf'' was written as '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
The Sheaf
''The Sheaf'' is a student-run newspaper serving the University of Saskatchewan in Saskatoon, Saskatchewan since 1912. A new issue comes out every Thursday with approximately 3,000 copies per issue. ''The Sheaf'' is a student-run non-profit organization. It receives part of its operating budget from U of S students in the form of a direct-levy; the remainder of the revenue is generated through advertising. The financial affairs are governed by a board of directors, most of whom are students. Mission The mission of ''The Sheaf'' is to inform and entertain students by addressing those issues that are relevant to life on campus, in the city, or in the province. The newspaper is also meant to be a forum for discussion on a wide range of issues that concern students. The paper is written for students by students. Most of the staff (editors, photographers, artists) are student-journalists. With this composition, The Sheaf tries to stay in touch with students on this campus. It offer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Aluma
Aluma () is a moshav in southern Israel. Located in the southern coastal plain around three kilometers north-west of Kiryat Gat, it falls under the jurisdiction of Shafir Regional Council. In it had a population of . History The village was established in 1965 as a youth village named Hazon Yehezkel by a group called ''Mosadot Hinukh Ezuri'' (lit. ''Institute for Regional Education''), made up of young members of Agudat Yisrael. It was built on the ruins of the depopulated Palestinian village of Hatta. In 1996 the Ministry of Interior granted the village municipal council status and renamed it Aluma. In 2014, the Israel Antiquities Authority uncovered a 1,500-year-old Byzantine church containing an ancient mosaic floor bearing a Christogram surrounded by birds. The church was discovered during a salvage dig prior to the construction of a new neighborhood on the moshav. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Sceafa
Sceafa ( , also ''Scēaf'', ''Scēf'') was an ancient Lombardic king in English legend. According to his story, Sceafa appeared mysteriously as a child, coming out of the sea in an empty skiff. The name also appears in the corrupt forms ''Seskef'', ''Stefius'', ''Strephius'', and ''Stresaeus''. Though the name has historically been modernized Shava (and Latinized Scefius), J.R.R. Tolkien used the correctly constructed modern English spelling ''Sheave''. ''Widsith'' The Old English poem ''Widsith'', line 32, in a listing of famous kings and their countries, has ''Sceafa Longbeardum'', so naming Sceafa as ruler of the Lombards. In ''Origo Gentis Langobardorum'' the Lombards' origins are traced to an "island" in the north named Scadan or Scandan ("Scandinavia"). But neither this account or any other mentions Sceafa among their later kings or gives the names of any kings that ruled them in the land of their origin where they were said to have been known as the Winnili. In geneal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Sheath (other)
Sheath, pronounced , may refer to: * Scabbard, a sheath for holding a sword, dagger, knife, or similar edged weapons, as well as long guns, such as rifles and shotguns. * The outer covering of an electrical cable * Debye sheath, a layer of a plasma in physics * Heliosheath, the region of the heliosphere beyond the termination shock * Kosha, an element in human being makeup according to Hinduist philosophy * Koteka, a penis sheath worn by some natives of New Guinea * ''Sheath'' (album), a 2003 album by LFO * Sheath dress, a type of dress Biology * Carotid sheath, connective tissue around the neck's vascular compartment * Leaf sheath, the leaf base when it forms a vertical coating surrounding the stem * Myelin sheath, an insulating layer over the axon of a neuron * Preputial sheath, protective skin around the penis or clitoris ** Clitoral sheath ** Penile sheath, the foreskin into which a penis retracts * Rectus sheath, the laminas around abdominal muscles * Root sheath, the inne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
