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Topic: Freeman Dyson


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In the News (Tue 21 Nov 17)

  
  Dyson sphere - Wikipedia, the free encyclopedia
A Dyson sphere (or "shell" as it appeared in the original paper) is a hypothetical megastructure.
The Dyson sphere concept was first mentioned in the novel Star Maker, by Olaf Stapledon, and formally described by physicist Freeman Dyson in his 1959 paper "Search for Artificial Stellar Sources of Infra-Red Radiation", published in the journal Science.
The concept of the Dyson sphere was the result of a thought experiment by Freeman Dyson where he noted that every human technological civilization has constantly increased its demand for energy.
en.wikipedia.org /wiki/Dyson_sphere   (1864 words)

  
 Dyson sphere
Dyson calculated that, if mankind's current Malthusian (exponential) growth rate in energy consumption were to continue, the human race would reach a crisis point within the next two to three millennia (see Malthus, Thomas Robert).
Dyson replied that what he actually envisaged was a loose collection of over 100,000 objects traveling on independent orbits in a shell about 1 million kilometers thick.
A Type I Dyson sphere, on the other hand, appears to be such an inevitable and achievable piece of astroengineering that we might expect not only the human race eventually to build one but for other civilizations, more advanced than our own, already to have theirs in place.
www.daviddarling.info /encyclopedia/D/Dysonsp.html   (1256 words)

  
 Freeman Dyson Encyclopedia Article @ LaunchBase.net   (Site not responding. Last check: 2007-11-07)
Freeman John Dyson (born December 15, 1923) is an English-born American physicist and mathematician, famous for his work in quantum mechanics, nuclear weapons design and policy, and for his serious theorizing in futurism and science fiction concepts, including the search for extraterrestrial intelligence.
Dyson conceived that such structures would be clouds of asteroid-sized space habitats, though science fiction writers have preferred a solid structure: either way, such an artifact is often referred to as a Dyson sphere, although Dyson himself used the term "shell".
Dyson says (20 minutes into a video) that he used the word "artificial biosphere" in the article meaning a habitat, not a shape.
www.launchbase.net /encyclopedia/Freeman_Dyson   (1022 words)

  
 Salon People Feature | Freeman Dyson, frog prince of physics   (Site not responding. Last check: 2007-11-07)
Freeman Dyson loves the metaphor that divides scientists into two groups: Birds, who look down upon everything and have a God's-eye view of the world, and frogs, who spend their time in the mud.
Dyson recalls that his parents expressed their affection by encouraging him to explore arts and culture; they were in their early 40s when they started their family: "[Being raised by my mother and father] was more like being with grandparents than parents, but they certainly loved us in their own fashion.
Dyson is a credible analyst because he is a man who has tasted war, having served in the British military while wrestling with his conscience over the morality of war and all that goes with it.
www.salon.com /people/feature/1999/10/09/dyson/print.html   (2324 words)

  
 [No title]
Freeman Dyson was born in 1923 in Crowthorne, Berkshire, England.
Dyson is a fellow of the Royal Society, a member of the U.S. National Academy of Sciences, a corresponding member of the Bavarian Academy of Sciences, a honorary fellow of Trinity College and an Associé Etranger de l'Académie des Sciences.
Dyson originally calculated that there is enough matter in the solar system to create a shell at least three meters thick, but this might be an overestimate since most matter in the solar system is hydrogen and helium, which isn't usable as building materials (as far as we know today).
www.nada.kth.se /~asa/dysonFAQ.html#WHAT   (5329 words)

  
 Article: An Evening with Freeman Dyson, by Greg Beatty
Dyson made this point near the close of his formal speech, calling for a rebirth of green technology, and seeing its foreshadowing in things such as the cloning of Dolly the sheep.
Dyson's discussion of the African ground nut scheme, which was historically informed and culturally astute, showed his ability to synthesize lessons from history, economics, sociology, and anthropology, as well as farming, and to treat them all as techne fit for solving problems.
Dyson closed his talk in a surprising fashion, but one entirely appropriate for a scientist; he decided that there was not sufficient information to answer either of his opening questions.
www.strangehorizons.com /2001/20011231/freeman_dyson.shtml   (3020 words)

  
 Luboš Motl's reference frame: Freeman Dyson on PhD, global warming, biotechnology, and superpowers
Freeman Dyson has been and is an eminent physicist who has never received a PhD even though his name appears in the main text of 1,410 scientific articles.
Dyson who has been important in the development of nuclear technology and who has proven the equivalence of different approaches to quantum field theory is no beginner in climate science.
One month ago, Freeman Dyson has co-authored the very same letter to the editors of Science as Steve McIntyre did, asking Science to assure that the data used to create the "hockey team" climate reconstructions are archived, as required by the magazine's policies.
motls.blogspot.com /2006/03/freeman-dyson-on-phd-global-warming.html   (1540 words)

  
 The Daily ACK: Keynote Speeches
The Dyson keynote speech, with Freeman Dyson and George Dyson (Esther Dyson is currently stuck in Texas) opened with the Star Trek episode where Picard discovered a Dyson sphere.
Freeman Dyson talked about biotech, which he called "the technology of the 21st century" drawing analogies with the computer industry which has become an integral part of peoples lives, and become domesticated.
Freeman Dyson said that the way we're going to avoid the dangers presented by biotech is probably down to luck, presenting the idea that this is pretty much how society makes it through every new challenge.
www.babilim.co.uk /blog/2004/07/keynote-speeches_29.html   (320 words)

  
 Book review of Freeman Dyson   (Site not responding. Last check: 2007-11-07)
Freeman Dyson is a physicist by profession, and this book is a physicist's speculations on the origins of life and on the relationship between cosmology and faith.
Dyson borrows ideas taken from Manfred Eigen (who claims that RNA can appear spontaneously) and Lynn Margulis (who claims that cellular evolution was due to parasites).
Dyson even computed the entropy of a human being (the rate at which humans dissipate energy times the human body's temperature times the duration of a unit of consciousness): 10 to the 23th.
www.thymos.com /mind/dyson2.html   (449 words)

  
 Freeman Dyson envisions biotech solutions to rural poverty : 3/01
Dyson's lecture, titled "Successes and Failures in Applying Science to Maintain Peace and Help the Poor," addressed whether high technology can be pursued without widening the gap between rich and poor.
Dyson, professor emeritus at the Institute for Advanced Study in Princeton, N.J., is best known for his popular books addressing what lies in store for humanity in both the near and distant future.
Dyson calls these new technologies "green" because they are based on biology rather than physics or chemistry, which are the primary foundations of what he calls the "gray" technologies of industry.
news-service.stanford.edu /news/2001/march21/dyson-321.html   (938 words)

  
 Dyson, Freeman John (1923-)
English-born theoretical physicist (became a U.S. citizen in 1957), president of the Space Sciences Institute, and professor emeritus at the Institute for Advanced Studies, Princeton, who has proposed several novel ideas in the field of SETI and of advanced space propulsion (see Project Orion).
Dyson has speculated how advanced civilizations might be able to travel between stars (see interstellar travel),
Dyson was one of the ancient natural philosophers, pre-Belt, almost pre-atomic.
www.daviddarling.info /encyclopedia/D/DysonF.html   (533 words)

  
 ONLamp.com -- Two Degrees of Freedom
Freeman Dyson has spent the past 50 years as a physicist at the Princeton Institute for Advanced Study.
Dyson spoke of the beauty and passion he saw at a recent flower show in Philadelphia as well as the lizards and snakes he saw at a reptile show.
Freeman answered a question about values and technology by saying that "For me, technology is just a tool and doesn't have religious overtones." Another questioner asked about his thoughts on the end of the universe.
www.onlamp.com /pub/a/onlamp/2004/07/30/dysons.html   (869 words)

  
 Origins of Life - Freeman Dyson
Dyson explains what he does fairly clearly; nevertheless, a certain familiarity with mathematical concepts is called for.
Dyson admits that a great deal of work must still be done in this field, but his model appears to be an interesting avenue to explore.
Freeman Dyson is Professor Emeritus of Physics at the Institute for Advanced Study at Princeton University.
www.complete-review.com /reviews/dysonf/origins.htm   (840 words)

  
 [No title]   (Site not responding. Last check: 2007-11-07)
Freeman Dyson, a world renown scientist who is a fellow of the American Physical Society, a member of the U.S. National Academy of Sciences, and a fellow of the Royal Society of London, will speak on “Gravitons” at St. John’s College.
Dyson explains that “according to the conventional wisdom, the problem is to construct a theory of quantum gravity, which would imply the existence of gravitons.” Using thought-experiments, Professor Dyson will question this conventional wisdom, asking whether it makes physical sense to talk about gravitons at all.
Freeman Dyson is professor emeritus, School for Natural Sciences, Institute for Advanced Study in Princeton, New Jersey.
www.stjohnscollege.edu /asp/newsDetail.aspx?hid=231   (280 words)

  
 Online NewsHour: The Tools of a Revolution -- June 16, 1999
FREEMAN DYSON: Exactly, which is a village where near I used to live.
FREEMAN DYSON: Well, the marketplace helps undoubtedly to get things started, but also you have to have politics and you have to have ethics, all has to work together.
FREEMAN DYSON: Well, we have to be prepared, of course, to push to get technology widely accessible.
www.pbs.org /newshour/gergen/june99/dyson_6-16.html   (1302 words)

  
 Dyson Sphere
The Dyson sphere (or Dyson shell) was originally proposed by the Information Age physicist Freeman Dyson in the article "Search for Artificial Stellar Sources of Infrared Radiation" as a way for an advanced civilisation to utilise all of the energy radiated by their sun.
Dyson's original idea was a swarm, not a shell, containing enough solar collectors around the star to absorb the starlight, containing at least 10,000 elements and around a million kilometers thick ; here is one, radiating away the waste heat after the swarm has utilised the star's energy.
A second type of Dyson uses lightweight sails to float on the light pressure from the star; these floating satellites are called statites and can support the weight of photovoltaic cells- these dyson statites are basically an energy collection device, but as they are close to the star they can be quite efficient.
www.orionsarm.com /civ/Dyson_Spheres.html   (1359 words)

  
 Big Ideas. Big Thinkers. Freeman Dyson | Thirteen/WNET
Freeman Dyson is a Professor Emeritus in mathematical physics and astrophysics at the Institute for Advanced Study.
Dyson was born in England and worked as a civilian scientist for the Royal Air Force in World War II.
Dyson is a fellow of the American Physical Society, a member of the U.S. National Academy of Sciences and the NASA Advisory Council, and a fellow of the Royal Society of London.
www.thirteen.org /bigideas/dyson.html   (430 words)

  
 Alternate View Column AV-30
Dyson, who characterizes himself as a "hard-core space cadet", feels, in essence, that men and machines both have their places in space, and that a balanced scientific program of exploration and discovery must exploit the strengths of both.
Dyson characterized the Apollo project as a brilliant success precisely because it was "conceived and honestly presented to the public as an international sporting event and not as a contribution to science." This was symbolized by the first item to be unpacked after landing on the Moon's surface, the television camera.
Dyson remarked that the Shuttle is a prime example of the "Problem of Premature Choice", a prevalent failing of government which he characterized as "betting all your money on one horse before you have found whether she is lame".
www.npl.washington.edu /AV/altvw30.html   (1983 words)

  
 Dyson's Long Shot :: Astrobiology Magazine ::
Summary (Oct 14, 2003): Renowned physicist Freeman Dyson, famous for his designs of grand energy collectors called Dyson's Sphere, has put down a public bet: life will first be discovered elsewhere not on a planet or moon, but someplace other than what we could recognize as terrestrial turf.
Freeman Dyson is betting that alien life doesn't live on a world like yours.
Dyson has pointed out that the fundamental problem with planets is that there's not much real estate for the mass involved.
www.astrobio.net /news/modules.php?op=modload&name=News&file=article&sid=632&mode=thread&order=0&thold=0   (715 words)

  
 Project Orion: Its Life, Death, and Possible Rebirth
Dyson gives the astounding figure of $100 million per year as the cost of the proposed twelve-year program (32); surely this does not include development costs for the thousands of items from spacesuits to scientific instruments that such a program would require.
Dyson says that his Air Force contacts, although sympathetic to the goal of space exploration, felt that their hands were tied (35).
Dyson says one or two (41); a simple inspection of published drawings indicates at least two, possibly three if the crew module (with crew aboard) was intended to be flown separately (42).
www.islandone.org /Propulsion/ProjectOrion.html   (4724 words)

  
 Imagined Worlds - Freeman Dyson
This book grew out of a series of lectures Dyson gave in Jerusalem in 1995, and the only weakness is that there is so little and that he does not flesh out his arguments and examples more fully.
Dyson is always suggestive, allowing the reader to take his ideas and build on them.
Dyson knows how difficult prediction is, but he still manages to paint a vivid picture of what our futures -- near and distant -- might hold.
www.complete-review.com /reviews/dysonf/imagined.htm   (447 words)

  
 Freeman Dyson Interview   (Site not responding. Last check: 2007-11-07)
Freeman J. Dyson is physicist and professor emeritus at Princeton University.
Professor Dyson, a skilled mathematician, describes the impact of World War II on his career path and his eventual concentration on physics.
Professor Dyson also discusses the second edition of his landmark book Origins of Life, a study of one of the major unsolved questions of science.
www7.nationalacademies.org /interviews/greenroom_dyson.html   (466 words)

  
 Dyson Spheres
The great advantage to a Dyson Sphere is twofold: One, the species inhabiting the sphere can theoretically use 100% of their sun's power, and two, the sphere's inner surface provides an enormous habitable area for, potentially, an entire species.
The Dyson Sphere which I have discussed so far is known as a Type 2 Dyson Sphere: It is a totally whole, solid sphere.
The Type 1 Dyson Sphere is much more within the grasp of current human technology, as the rings can be built gradually out of ordinary materials, where a Type 2 would require a substance significantly stronger than diamond.
users.rcn.com /jasp.javanet/dyson   (819 words)

  
 The SF Site Featured Review: The Sun, the Genome, and the Internet -- Tools of Scientific Revolutions
Freeman Dyson, a theoretical physicist, is the president of the Space Studies Institute.
Dyson cheerfully admits his record as a prophet is mixed, but "it is better to be wrong than to be vague."
Dyson is a lifelong space enthusiast, though things haven't gone that well lately for space fans: "we look at the bewildered cosmonauts struggling to survive in the Mir space station.
www.sfsite.com /08b/sun63.htm   (634 words)

  
 Freeman Dyson appearance - collectSPACE: Messages
Dyson is renowned for his subsequent work in unifying the three versions of quantum electrodynamics.
Dyson’s lecture is the third in NJIT’s new technology and society forum series.
The forums are designed to explore the connections between the technological expertise that students study in the classroom and the real-world geo-political issues that affect the quality of human life.
www.collectspace.com /ubb/Forum23/HTML/001386.html   (389 words)

  
 Freeman Dyson - Wikiquote
Freeman John Dyson (born 15 December 1923) English-born American physicist, mathematician, and futurist, famous for his work in quantum mechanics, nuclear weapons design and policy, and the search for extraterrestrial intelligence.
You'll have received an application from Mr Freeman Dyson to come to work with you as a graduate student.
Freeman Dyson: Gravity is Cool, or, Why our Universe is Hospitable to Life Oppenheimer lecture (9 March 2000)
en.wikiquote.org /wiki/Freeman_Dyson   (3164 words)

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