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Orion's Arm (also called the Orion's Arm Universe Project, OAUP, or simply OA) is a multi-authored online science fiction world-building project, first established in 2000〔(Orion's Arm - The Early Years )〕 by M. Alan Kazlev, Donna Malcolm Hirsekorn, Bernd Helfert and Anders Sandberg and further co-authored by many people since.〔M. Alan Kazlev, (Voices/Future Tense » Orion's Arm - The Beginning )〕 Anyone can contribute articles, stories, artwork, or music to the website. A large mailing list exists,〔(Orion's Arm - Yahoo! Mailing List )〕 in which members debate aspects of the world they are creating, discussing additions, modifications, issues arising, and work to be done. A computer game and a role-playing game are being developed by the community, within the OA milieu. There is an ezine for Orion's Arm fiction, art, and commentary, called ''Voices: Future Tense'',〔Bill Ernoehazy, (ed.), (Voices: Future Tense )〕 add-ons for the Celestia program to displaying Orion's Arm planets, spacecraft and other objects,〔(The Orion's Arm Universe in Celestia )〕 and additional transhumanist flavored SF illustrations.〔Bernd Helfert, (oa art gallery )〕 The first published Orion's Arm book, a collection of five novellas set within the OA universe, called ''Against a Diamond Sky'',〔The Orion's Arm Universe Project, ''Against A Diamond Sky: Tales from Orion's Arm Vol. 1'', Outskirts Press, 2009, ISBN 1-4327-4099-7 ISBN 978-1432740993〕 was released in September 2009 by Outskirts Press.〔(Outskirts Press announces Against A Diamond Sky )〕 The second published Orion's Arm book, called ''After Tranquility'', was released in February 2014.〔http://www.orionsarm.com/forum/showthread.php?tid=648〕〔http://www.orionsarm.com/xcms.php?r=oa-page&page=gen_updates〕 ==Setting== OA is set over ten thousand years in the future, and claims to adhere to plausible, or "hard" science fiction; that is, no human-like aliens, no literal faster-than-light travel or other violations of the known laws of physics, and no "naval analogy" space battles. Certain speculative technologies, such as the creation of "negative mass" (averaged null energy condition-violating) exotic matter and the manipulation of strange forms of matter, such as magnetic monopoles and Q-balls, on length scales much smaller than that of an atom, strong artificial intelligence and artificial life appear in the setting, distinguishing it from "ultra-hard" science fiction (which assumes only technologies proven to be possible at the time it is written). The denizens of this universe are ruled over by god-like, superintelligent artificial intelligences (AIs), called "archailects", the descendants of humanity's (though not exclusively) early artificial life experimentation. These beings are so powerful that they can create new miniature universes, and are completely beyond the comprehension of normal humans. Their bodies exist as distributed intelligences in networks of planet-sized computer brains; their subroutines are themselves sentient, making an "archai" an individual and a civilization at the same time. Extraterrestrial life exists, but the focus is entirely on the descendants and creations of Earth life, here collectively called "terragen life". Normal humans, called "baselines", are an endangered species. Their genetically and cybernetically enhanced descendants have supplanted them. There are many types of intelligent life: nearbaselines (enhanced humans), posthumans, cyborgs, vecs (intelligent robots; named for Hans Moravec), aioids (intelligent computers), uploads (intelligences transferred into computers), neumanns (self-replicating robots; named for John von Neumann), provolves (animals with enhanced intelligence, similar to "uplift" - see below), rianths (humans with animal DNA spliced in), splices (similar to provolves, upgraded with human DNA), neogens (life genetically synthesized from non-life) and xenosophonts (aliens). Nanotechnology is common. Ringworlds, Dyson spheres and other "megastructures" exist. Much of civilised space is connected by a network of wormholes. OA is a part of the transhuman space opera subgenre. The world was influenced by Iain M. Banks' ''Culture'' series, Vernor Vinge's ''A Fire Upon the Deep'', and David Brin's ''Uplift Universe'', among others. It takes the concept of the technological singularity directly from the work of Vernor Vinge among others. In ''Orion's Arm'', there is not one singularity but at least six, and they refer not to stages in the technological development of civilizations as a whole, but to different levels of consciousness in individuals. The concept of Toposophics used in this setting is inspired by the work of Stanisław Lem. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Orion's Arm」の詳細全文を読む スポンサード リンク
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