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Hoberman Mechanism
A Hoberman mechanism, or Hoberman linkage, is a deployable mechanism that turns linear motion into radial motion. The Hoberman mechanism is made of two angulated rigid bars connected at a central point by a revolute joint, making it move much like a scissor mechanism. Multiple of these linkages can be joined together at the ends of the angulated bars by more revolute joints, expanding radially to make circle shaped mechanisms. The mechanism is a GAE (generalize angulated element) where the coupler curve is a radial straight line. This allows the Hoberman mechanism to act with a single degree of freedom, meaning that it is an over-constrained mechanism because the mobility formula predicts that it would have a smaller degree of freedom than it does, as the mechanism has more degrees of freedom than the mobility formula predicts. The kinematic theory behind the Hoberman mechanism has been used to help further the understanding of mobility and foldability of deployable mechanisms. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Actuator
An actuator is a machine element, component of a machine that produces force, torque, or Displacement (geometry), displacement, when an electrical, Pneumatics, pneumatic or Hydraulic fluid, hydraulic input is supplied to it in a system (called an actuating system). The effect is usually produced in a controlled way. An actuator translates such an input signal into the required form of mechanical energy. It is a type of transducer. In simple terms, it is a "mover". An actuator requires a control device (which provides control signal) and a source of energy. The control signal is relatively low in energy and may be voltage, electric current, Compressed air, pneumatic, or hydraulic fluid pressure, or even human power. In the electric, hydraulic, and pneumatic sense, it is a form of automation, automation or automatic control. The displacement achieved is commonly linear or rotational, as exemplified by linear motors and rotary motors, respectively. Rotary motion is more natural for s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Utah
Utah is a landlocked state in the Mountain states, Mountain West subregion of the Western United States. It is one of the Four Corners states, sharing a border with Arizona, Colorado, and New Mexico. It also borders Wyoming to the northeast, Idaho to the north, and Nevada to the west. In comparison to all the U.S. states and territories, Utah, with a population of just over three million, is the List of U.S. states and territories by area, 13th largest by area, the List of U.S. states and territories by population, 30th most populous, and the List of U.S. states by population density, 11th least densely populated. Urban development is mostly concentrated in two regions: the Wasatch Front in the north-central part of the state, which includes the state capital, Salt Lake City, and is home to roughly two-thirds of the population; and Washington County, Utah, Washington County in the southwest, which has approximately 180,000 residents. Most of the western half of Utah lies in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Olympic Games
The modern Olympic Games (Olympics; ) are the world's preeminent international Olympic sports, sporting events. They feature summer and winter sports competitions in which thousands of athletes from around the world participate in a Multi-sport event, variety of competitions. The Olympic Games, Open (sport), open to both amateur and professional athletes, involves more than 200 teams, each team representing a sovereign state or territory. By default, the Games generally substitute for any world championships during the year in which they take place (however, each class usually maintains its own records). The Olympics are staged every four years. Since 1994 Winter Olympics, 1994, they have alternated between the Summer Olympic Games, Summer and Winter Olympics every two years during the four-year Olympiad. Their creation was inspired by the ancient Olympic Games, held in Olympia, Greece, from the 8th century BC to the 4th century AD. Baron Pierre de Coubertin founded the Int ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hoberman Arch
The Hoberman Arch is an architectural element designed by Chuck Hoberman as the centerpiece of the Olympic Medals Plaza in Salt Lake City, during the 2002 Winter Olympics. Following the Olympics, the arch was moved to the Salt Lake 2002 Olympic Cauldron Park at the University of Utah where, along with the Olympic cauldron, it was one of the main features and an important part of Salt Lake's Olympic legacy. In August 2014, the arch was removed from the park and placed in storage, where 29 pieces were stolen. A restored arch was placed on display alongside the exit road of the Salt Lake City International Airport in August 2023. Design and history The arch is a semi-circular aluminum structure, which opened like the iris of a human eye. It was designed to be used as a mechanical curtain for the Olympic Medal Plaza's stage. The design was inspired by Utah's natural stone arches, such as Delicate Arch. At the time of its construction, the arch was the largest unfolding structu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hoberman Sphere
A Hoberman sphere is a kinetic structure patented by Chuck Hoberman that resembles a geodesic dome, but is capable of folding down to a fraction of its normal size by the scissor-like action of its joints. Colorful plastic versions have become popular as children's toys: several toy sizes exist, with the original design capable of expanding from in diameter to . Description A Hoberman sphere typically consists of six great circles corresponding to the edges of an icosidodecahedron. The Hoberman sphere can be unfolded by allowing certain members to spread apart. The operation of each joint is linked to all the others in a scissors mechanism like those used to mount pantograph mirrors, or how a folding chair operates. In larger models, this can be accomplished by feeding out a string or cable instead. The largest existing Hoberman sphere is in the AHHAA Science Center in Tartu, Estonia. Fully expanded, it is in diameter. The motorized sphere weighs , is constructed of a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
France
France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlantic, North Atlantic, the French West Indies, and List of islands of France, many islands in Oceania and the Indian Ocean, giving it Exclusive economic zone of France, one of the largest discontiguous exclusive economic zones in the world. Metropolitan France shares borders with Belgium and Luxembourg to the north; Germany to the northeast; Switzerland to the east; Italy and Monaco to the southeast; Andorra and Spain to the south; and a maritime border with the United Kingdom to the northwest. Its metropolitan area extends from the Rhine to the Atlantic Ocean and from the Mediterranean Sea to the English Channel and the North Sea. Its Regions of France, eighteen integral regions—five of which are overseas—span a combined area of and hav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New York City
New York, often called New York City (NYC), is the most populous city in the United States, located at the southern tip of New York State on one of the world's largest natural harbors. The city comprises five boroughs, each coextensive with a respective county. The city is the geographical and demographic center of both the Northeast megalopolis and the New York metropolitan area, the largest metropolitan area in the United States by both population and urban area. New York is a global center of finance and commerce, culture, technology, entertainment and media, academics, and scientific output, the arts and fashion, and, as home to the headquarters of the United Nations, international diplomacy. With an estimated population in 2024 of 8,478,072 distributed over , the city is the most densely populated major city in the United States. New York City has more than double the population of Los Angeles, the nation's second-most populous city. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Museum Of Modern Art
The Museum of Modern Art (MoMA) is an art museum located in Midtown Manhattan, New York City, on 53rd Street (Manhattan), 53rd Street between Fifth Avenue, Fifth and Sixth Avenues. MoMA's collection spans the late 19th century to the present, and includes over 200,000 works of architecture and design, drawing, painting, sculpture, photography, screen printing, prints, book illustration, illustrated and artist's books, film, as well as electronic media. The institution was conceived in 1929 by Abby Aldrich Rockefeller, Lillie P. Bliss, and Mary Quinn Sullivan. Initially located in the Crown Building (Manhattan), Heckscher Building on Fifth Avenue, it opened just days after the Wall Street Crash of 1929, Wall Street Crash. The museum was led by Anson Goodyear, A. Conger Goodyear as president and Abby Rockefeller as treasurer, with Alfred H. Barr Jr., Alfred H. Barr Jr. as its first director. Under Barr's leadership, the museum's collection rapidly expanded, beginning with an inaug ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hoberman Sphere
A Hoberman sphere is a kinetic structure patented by Chuck Hoberman that resembles a geodesic dome, but is capable of folding down to a fraction of its normal size by the scissor-like action of its joints. Colorful plastic versions have become popular as children's toys: several toy sizes exist, with the original design capable of expanding from in diameter to . Description A Hoberman sphere typically consists of six great circles corresponding to the edges of an icosidodecahedron. The Hoberman sphere can be unfolded by allowing certain members to spread apart. The operation of each joint is linked to all the others in a scissors mechanism like those used to mount pantograph mirrors, or how a folding chair operates. In larger models, this can be accomplished by feeding out a string or cable instead. The largest existing Hoberman sphere is in the AHHAA Science Center in Tartu, Estonia. Fully expanded, it is in diameter. The motorized sphere weighs , is constructed of a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elaine Dannheisser
Elaine Dannheisser (Brooklyn 1923 - 2001 Manhattan) was an avid contemporary art collector and driving force behind the Werner and Elaine Dannheisser Art Collection. She was a onetime trustee of the Guggenheim Museum. Following an exhibition of her collection in 1997-98, she donated the largest ever cache of contemporary art to the Museum of Modern Art. Early activity Early in her life, Elaine Dannheisser studied art at Art Students League of New York. Werner Dannheisser (1909–1992) and Elaine married and initially collected French painting such as Pablo Picasso, Jean Dubuffet, Maurice Utrillo and Fernand Léger. In the 1980s the Dannheissers sold their French painting collection and began to purchase contemporary art from Soho and East Village galleries. Elaine became a passionate bridge player, frequently spending six hours a day at the Beverly Bridge Club, at Lexington Avenue and 57th Street. Dannheisser Foundation In 1982, the couple established the Dannheisser Foundation, w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
