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The Smoke Ring (novel)
''The Smoke Ring'' is a 1987 science fiction novel by Larry Niven. Like much of Niven's work, the story is heavily influenced by the setting: a gas torus, a ring of air around a neutron star. It is a sequel to ''The Integral Trees''. Setting The story is set at the fictional neutron star Levoy's Star (abbreviated "Voy"). The gas giant Goldblatt's World (abbreviated "Gold") orbits the star just outside its Roche limit. While Gold's gravity is enough to keep it from being pulled apart by Voy's tidal forces, it is insufficient to hold its atmosphere, which has been pulled loose into an independent orbit around Voy. This orbiting air forms a ring known as a gas torus. The gas torus is huge—one million kilometers thick—but most of it is too thin to be habitable. The central part of the Gas Torus, where the air is thicker, is known as the Smoke Ring. The Smoke Ring supports a wide variety of life. Robert L. Forward helped Niven calculate the parameters of the ring. There is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Larry Niven
Laurence van Cott Niven (; born April 30, 1938) is an American science fiction writer. His best-known works are ''Ringworld'' (1970), which received Hugo, Locus, Ditmar, and Nebula awards, and, with Jerry Pournelle, ''The Mote in God's Eye'' (1974) and ''Lucifer's Hammer'' (1977). The Science Fiction and Fantasy Writers of America named him the 2015 recipient of the Damon Knight Memorial Grand Master Award. His work is primarily hard science fiction, using big science concepts and theoretical physics. It also often includes elements of detective fiction and adventure stories. His fantasy includes the series ''The Magic Goes Away'', rational fantasy dealing with magic as a non-renewable resource. Biography Niven was born in Los Angeles. He is a great-grandson of Edward L. Doheny, an oil tycoon who drilled the first successful well in the Los Angeles City Oil Field in 1892, and also was subsequently implicated in the Teapot Dome scandal. Niven briefly attended the Califor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trilateral Symmetry
Rotational symmetry, also known as radial symmetry in geometry, is the property a shape has when it looks the same after some rotation by a partial turn. An object's degree of rotational symmetry is the number of distinct orientations in which it looks exactly the same for each rotation. Certain geometric objects are partially symmetrical when rotated at certain angles such as squares rotated 90°, however the only geometric objects that are fully rotationally symmetric at any angle are spheres, circles and other spheroids. Formal treatment Formally the rotational symmetry is symmetry with respect to some or all rotations in ''m''-dimensional Euclidean space. Rotations are Euclidean group#Direct and indirect isometries, direct isometries, i.e., Isometry, isometries preserving Orientation (mathematics), orientation. Therefore, a symmetry group of rotational symmetry is a subgroup of ''E''+(''m'') (see Euclidean group). Symmetry with respect to all rotations about all points ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1987 American Novels
File:1987 Events Collage.png, From top left, clockwise: The MS Herald of Free Enterprise capsizes after leaving the Port of Zeebrugge in Belgium, killing 193; Northwest Airlines Flight 255 crashes after takeoff from Detroit Metropolitan Airport, killing everyone except a little girl; The King's Cross fire kills 31 people after a fire under an escalator flashes-over; The MV Doña Paz sinks after colliding with an oil tanker, drowning almost 4,400 passengers and crew; Typhoon Nina strikes the Philippines; LOT Polish Airlines Flight 5055 crashes outside of Warsaw, taking the lives of all aboard; The USS Stark is struck by Iraqi Exocet missiles in the Persian Gulf; U.S. President Ronald Reagan gives a famous speech, demanding that Soviet leader Mikhail Gorbachev tears down the Berlin Wall., 300x300px, thumb rect 0 0 200 200 Zeebrugge disaster rect 200 0 400 200 Northwest Airlines Flight 255 rect 400 0 600 200 King's Cross fire rect 0 200 300 400 Tear down this wall! rect 300 200 60 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ringworld
''Ringworld'' is a 1970 science fiction novel by Larry Niven, set in his Known Space universe and considered a classic of science fiction literature. ''Ringworld'' tells the story of Louis Wu and his companions on a mission to the Ringworld, a rotating wheel artificial world, an alien construct in space in diameter. Niven later added three sequel novels and then cowrote, with Edward M. Lerner, four prequels and a final sequel; the five latter novels constitute the Fleet of Worlds series. All the novels in the Ringworld series tie into numerous other books set in Known Space. ''Ringworld'' won the Nebula Award in 1970, as well as both the Hugo Award and Locus Award in 1971. Plot summary On planet Earth in 2850 AD, Louis Gridley Wu is celebrating his 200th birthday. Despite his age, Louis is in perfect physical condition due to the longevity drug boosterspice. He meets Nessus, a Pierson's puppeteer, who offers him a mysterious job. Intrigued, Louis eventually accepts. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diverse Talents, Incorporated
Diversity, diversify, or diverse may refer to: Business *Diversity (business), the inclusion of people of different identities (ethnicity, gender, age) in the workforce *Diversity marketing, marketing communication targeting diverse customers * Supplier diversity, the use of diverse suppliers Politics * Diversity (politics), the political and social policy of encouraging tolerance for people of different cultural and racial backgrounds * Diversity Immigrant Visa or Green Card Lottery, a United States immigration program * Diversity jurisdiction, a concept under which U.S. federal courts can hear suits between parties from different states * Diversity training, the process of educating people to function in a diverse environment * Cultural diversity, the respect of different cultures and interculturality * Functional diversity (disability), a term for special needs, disability, impairment and handicap * Gerodiversity, a multicultural approach to issues of aging * Multiculturalis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Space Gamer
''The Space Gamer'' was a magazine dedicated to the subject of science fiction and fantasy board games and tabletop role-playing games. It quickly grew in importance and was an important and influential magazine in its subject matter from the late 1970s through the mid-1980s. The magazine is no longer published, but the rights holders maintain a web presence using its final title ''Space Gamer/Fantasy Gamer''. History ''The Space Gamer'' (''TSG'') started out as a digest quarterly publication of the brand new Metagaming Concepts Metagaming Concepts, later known simply as Metagaming, was a company that published board games from 1974 to 1983. It was founded and owned by Howard Thompson, who designed the company's first game, '' Stellar Conquest''. The company also inven ... company in March 1975. Howard M. Thompson, the owner of Metagaming and the first editor of the magazine, stated "The magazine had been planned for after our third or fourth game but circumstances demand ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Library Journal
''Library Journal'' is an American trade publication for librarians. It was founded in 1876 by Melvil Dewey. It reports news about the library world, emphasizing public libraries, and offers feature articles about aspects of professional practice. It also reviews library-related materials and equipment. Each year since 2008, the Journal has assessed public libraries and awarded stars in their Star Libraries program. Its "Library Journal Book Review" does pre-publication reviews of several hundred popular and academic books each month. ''Library Journal'' has the highest circulation of any librarianship journal, according to Ulrich's—approximately 100,000. ''Library Journal's'' original publisher was Frederick Leypoldt, whose company became R. R. Bowker. Reed International (later merged into Reed Elsevier) purchased Bowker in 1985; they published ''Library Journal'' until 2010, when it was sold to Media Source Inc., owner of the Junior Library Guild and ''The Horn Book Ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magill Book Reviews
''Magill'' was an Irish politics and current affairs magazine founded by Vincent Browne and others in 1977. ''Magill'' specialised in investigative articles and colourful reportage by journalists such as Eamonn McCann (who wrote its anonymous ''Wigmore'' column) and Gene Kerrigan. It was relaunched in 2004 after an earlier closure before closing again in 2009. Berry diaries It first achieved a nationwide profile when it published the diaries of Peter Berry, the former Secretary (administrative head) to the Department of Justice in which he alleged that former Taoiseach Jack Lynch had been less than forthright publicly about the truth surrounding the 1970 Arms Crisis which brought down two ministers, including Charles Haughey. In the 1980s as Ireland underwent rapid political change it became the major Irish magazine covering politics. Changes in editor Browne later appointed a series of editors with him becoming managing editor. Its early editors included Fintan O'Toole, J ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Travel Journal
The genre of travel literature encompasses outdoor literature, guide books, nature writing, and travel memoirs. One early travel memoirist in Western literature was Pausanias, a Greek geographer of the 2nd century CE. In the early modern period, James Boswell's ''Journal of a Tour to the Hebrides'' (1786) helped shape travel memoir as a genre. History Early examples of travel literature include the ''Periplus of the Erythraean Sea'' (generally considered a 1st century CE work; authorship is debated), Pausanias' ''Description of Greece'' in the 2nd century CE, '' Safarnama'' (Book of Travels) by Nasir Khusraw (1003-1077), the '' Journey Through Wales'' (1191) and '' Description of Wales'' (1194) by Gerald of Wales, and the travel journals of Ibn Jubayr (1145–1214), Marco Polo (1254–1354), and Ibn Battuta (1304–1377), all of whom recorded their travels across the known world in detail. As early as the 2nd century CE, Lucian of Samosata discussed history and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lagrange Point
In celestial mechanics, the Lagrange points (; also Lagrangian points or libration points) are points of equilibrium for small-mass objects under the influence of two massive orbiting bodies. Mathematically, this involves the solution of the restricted three-body problem in which two bodies are far more massive than the third. Normally, the two massive bodies exert an unbalanced gravitational force at a point, altering the orbit of whatever is at that point. At the Lagrange points, the gravitational forces of the two large bodies and the centrifugal force balance each other. This can make Lagrange points an excellent location for satellites, as few orbit corrections are needed to maintain the desired orbit. Small objects placed in orbit at Lagrange points are in equilibrium in at least two directions relative to the center of mass of the large bodies. For any combination of two orbital bodies there are five Lagrange points, L1 to L5, all in the orbital plane of the two lar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isaac Asimov
yi, יצחק אזימאװ , birth_date = , birth_place = Petrovichi, Russian SFSR , spouse = , relatives = , children = 2 , death_date = , death_place = Manhattan, New York City, U.S. , nationality = Russian (1920–1922)Soviet (1922–1928)American (1928–1992) , occupation = Writer, professor of biochemistry , years_active = 1939–1992 , genre = Science fiction (hard SF, social SF), mystery, popular science , subject = Popular science, science textbooks, essays, history, literary criticism , education = Columbia University ( BA, MA, PhD) , movement = Golden Age of Science Fiction , module = , signature = Isaac Asimov signature.svg Isaac Asimov ( ; 1920 – April 6, 1992) was an American writer and professor of biochemistry at Boston University. During his lifetime, Asimov was considered one of the "Big Three" science fiction writers, along with Robert A. Heinlein and Arthur C. Clarke. A prolific writer, he wrote or edited more than 500 books ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Integral
In mathematics Mathematics is an area of knowledge that includes the topics of numbers, formulas and related structures, shapes and the spaces in which they are contained, and quantities and their changes. These topics are represented in modern mathematics ..., an integral assigns numbers to functions in a way that describes Displacement (geometry), displacement, area, volume, and other concepts that arise by combining infinitesimal data. The process of finding integrals is called integration. Along with Derivative, differentiation, integration is a fundamental, essential operation of calculus,Integral calculus is a very well established mathematical discipline for which there are many sources. See and , for example. and serves as a tool to solve problems in mathematics and physics involving the area of an arbitrary shape, the length of a curve, and the volume of a solid, among others. The integrals enumerated here are those termed definite integrals, which can be int ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
