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Topic: Ronald N Bracewell


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In the News (Mon 16 Nov 09)

  
  Ronald N. Bracewell - Wikipedia, the free encyclopedia
Ronald Newbold Bracewell was born in Sydney, Australia, in 1921, and educated at Sydney Boys High School.
Professor Bracewell is a Fellow of the Royal Astronomical Society (1950), Fellow and life member of the Institute of Electrical and Electronic Engineers (1961), Fellow of the American Association for the Advancement of Science (1989), and is a Fellow with other significant societies and organizations.
With the advent of the space age, Bracewell became interested in celestial mechanics, made observations of the radio emission from Sputnik 1, and supplied the press with accurate charts predicting the path of Soviet satellites, which were perfectly visible, if you knew when and where to look.
en.wikipedia.org /wiki/Ronald_N._Bracewell   (1957 words)

  
 Ronald N. Bracewell -- Facts, Info, and Encyclopedia article   (Site not responding. Last check: 2007-10-29)
Ronald Newbold Bracewell (1921 –) is the Lewis M. Terman Professor of Electrical Engineering, Emeritus of the Space, Telecommunications and Radioscience Laboratory at (A university in California) Stanford University.
From October 1949 to September 1954 Dr. Bracewell was a Senior Research Officer at the Radiophysics Laboratory of the (additional info and facts about CSIRO) CSIRO, Sydney, concerned with very long wave propagation and (The branch of astronomy that detects and studies the radio waves emitted by celestial bodies) radio astronomy.
Professor Bracewell was a member of the (A university in California) Stanford University Senate (1970-72, 1978-80), of the Committee on Committees (1970-72), Director of the Radioscience Laboratory 1970-1975, as well as other significant memberships in Standford University.
www.absoluteastronomy.com /encyclopedia/r/ro/ronald_n._bracewell.htm   (1918 words)

  
 Bracewell probes
Bracewell argued that interstellar "messenger probes", as he called them, offered an attractive alternative to the conventional SETI approach of listening for extraterrestrial signals and, if successful, engaging in a slow dialogue across many light-years.
As originally conceived, Bracewell probes, powered by high-speed propulsion units for interstellar travel, and autonomously controlled by computers with a high degree of artificial intelligence, would be dispatched toward star systems that had been earmarked as biologically interesting.
Upon arrival at a target star, a Bracewell probe would enter a near-circular orbit in the middle of the star's habitable zone and in the same plane as its planetary system.
www.daviddarling.info /encyclopedia/B/Bracewellprobes.html   (996 words)

  
 "Destiny of Man" subject of public lecture   (Site not responding. Last check: 2007-10-29)
STANFORD -- Ronald N. Bracewell - a radio astronomer who pioneered a new method for detecting planets around other suns and also developed a method for reconstructing astronomical images that was adopted for use in CAT scanners - will deliver the 15th annual Bunyan Lecture at Stanford.
The theme for Bracewell's talk is taken from the bequest that established the annual lecture series 16 years ago.
Bracewell will address the topic by looking at a variety of predictions of humanity's future, ranging from the optimistic to the pessimistic.
www.stanford.edu /dept/news/pr/96/960220bracewell.html   (428 words)

  
 Bracewell elected to Institute of Medicine   (Site not responding. Last check: 2007-10-29)
STANFORD -- Ronald N. Bracewell, professor emeritus of electrical engineering, has been elected a foreign associate of the Institute of Medicine of the National Academy of Sciences.
That article was based on a 1956 paper Bracewell wrote for the Australian Journal of Physics, in which he first published the projection-slice theorem, fundamental to image reconstruction.
Bracewell said that "many contributions to medicine have been made from electronics and electro-magnetic technology, such as the use of lasers for attaching retinas and electron accelerators for cancer treatment."
www.stanford.edu /dept/news/pr/92/920518Arc2216.html   (297 words)

  
 [No title]   (Site not responding. Last check: 2007-10-29)
Such an arrangement of paired, out-of-phase telescopes is known as a 'Bracewell interferometer', after its inventor, and because it works by the interaction of two beams of light to produce an 'interference' pattern.
Bracewell imagined that his device would be used in some future space-based instrument: even with his interferometer, pictures of distant planets taken by ground-based telescopes, especially in the infra-red range, would be blurred into uselessness by the distorting haze of the Earth's atmosphere.
Bracewell interferometry applied to the LBT could detect Jupiter-sized extrasolar planets up to 10 parsecs (32 light years) away, and analyze them spectroscopically for signs - for example - of the oxygen atmospheres suggestive of life.
www.nature.com /news/1998/980924/pf/980924-1_pf.html   (841 words)

  
 Andy Kessler: AO: Bracewell's Observatory   (Site not responding. Last check: 2007-10-29)
In the late ‘50’s, Ronald N. Bracewell, who is still kicking and I had a nice chat with, was a scientist at Stanford’s Radio Propagation Lab which turned into Space, Telecommunications and Radioscience Laboratory, STAR Lab.
Bracewell had all sorts of data, but his goal was a daily microwave spectroheliograph, basically a weather map of the Sun’s surface.
Bracewell’s problem was that there just weren’t all that many computers around in 1961 to do his calculations, certainly no workstations or personal computers he could install at Site 515 to compute his map.
andykessler.com /ao_bracewells_observatory.html   (1341 words)

  
 Bracewell, Ronald Newbold (1921-)
I realize the odd coincidence that in 1954-55, when I was lecturing at Berkeley, two people were there who also became key figures in the new developments....
Bracewell's name is associated with the robotic spacecraft (see Bracewell probes) he proposed might be sent out by advanced civilizations to establish contact with other races in the Galaxy.
In 1978, he showed how an optical interferometer consisting of two 1-m telescopes separated by 20 m could be used to search for large extrasolar planets by a method now known as nulling interferometry.
www.daviddarling.info /encyclopedia/B/BracewellR.html   (340 words)

  
 Computer and method for the discrete bracewell transform - Patent 4646256   (Site not responding. Last check: 2007-10-29)
The number N of values of input data may vary, but the larger the value of N the greater the resolution of the output data.
The Discrete Bracewell Transform can be arrived at by performing the multiplications and summation indicated by the formula but the efficiency is improved by means of a Fast Bracewell Transform (FBT), which proceeds by a plurality of stages.
The N radar data samples, for each frame period, are input to the discrete transform computer 35 The discrete transform computer 35 transforms the input radar data samples and forms, on the output lines 31, the Discrete Bracewell Transformed values.
www.freepatentsonline.com /4646256.html   (8837 words)

  
 Galactic Club
Our prospects for membership of such a Club, should it exist, may depend on our ability to solve our present environmental, political and sociological problems, as well as our capacity to reach a certain level of proficiency in interstellar communication or transport.
Bracewell proposed that we may be under surveillance by races interested in our progress.
Bracewell, Ronald N. The Galactic Club: Intelligent Life in Outer Space.
www.daviddarling.info /encyclopedia/G/GalClub.html   (323 words)

  
 THE
Clarke [41] and Bracewell [42] suggest an equipartition of effort between senders and recipients in which the sender is required only to send probes through target star systems on hyperbolic orbits and potential recipients are held responsible for detection, the initiation of dialogue, and possibly capture.
Bracewell [67] suggested that the well-known long-delay echo (LDE) phenomenon was of the type which might be expected as a call sign from an extraterrestrial artifact parked in Earth orbit and desiring to communicate, and Lunan [68] claimed to have decoded several "LDE messages" based on data from Stormer [69] and van de Pol [70].
Bracewell, R. N., Manifestations of advanced civilizations, in J. Billingham (Ed.), Life in the Universe, MIT Press, Cambridge, Massachusetts, 343-350, 1981.
www.rfreitas.com /Astro/SETAJBISNov1983.htm   (5413 words)

  
 University Wire : Stanford's Bracewell receives medal - Engineering prof appointed to Order of Australia @ HighBeam ...   (Site not responding. Last check: 2007-10-29)
On Sept. 24, Bracewell was appointed as an officer in the General Division of the Order of Australia, but he has "nowhere to wear" the impressive gold medal that now sits atop his desk in the Durand Building.
Bracewell was recognized in June by the Australian government for his service to science in the fields of radio astronomy and image reconstruction.
Along with this citation, Queen Elizabeth II of England, as the sovereign of the Order of Australia, appointed Bracewell one of the 11 officers to celebrate her birthday.
static.elibrary.com /u/universitywire/october121998/stanfordsbracewellreceivesmedalengineeringprofappo/index.html   (240 words)

  
 ch5.2
RONALD N. All unorthodox suggestions warrant some consideration because future discoveries may not be obviously implied by what we know now.
We should be on the alert for phenomena that might contribute to the detection of advanced civilizations elsewhere.
The idea of panspermia, the diffusion of spores or molecular precursors of life through space, originated with and continues to be entertained by distinguished people.
history.nasa.gov /CP-2156/ch5.2.htm   (3109 words)

  
 Koza Presentation 6.6 ~ 6.8   (Site not responding. Last check: 2007-10-29)
n) operations plus a small multiple of the number needed to compute the discrete Fourier transformation and its inverse.
n – 1 through the chain of comparators added at the last wavefront and every path through the sorting network is extended by one comparator with the addition of the new wavefront.
Bracewell, Ronald N. The Fourier Transform and Its Applications.
www.people.vcu.edu /~dprimeau/cmsc621/fall02/presentations/koza1files/JKozaPresentation.htm   (2398 words)

  
 Commonsense Sex A Basis for Discussion and Reappraisal :: Commonsense Sex A Basis for Discussion and Reappraisal books, ...
Ronald Modras "The Catholic Church and Antisemitism Poland 1933 - 1939 Studies in Antisemitism Vol 1".
Ronald N Bracewell "The Fourier Transform and Its Applications McGrawHill Series in Electrical and Computer Engineering Circuits and Systems"
Ronald N. Ashkenas, Dave Ulrich, Foreword by Lawrence A. Bossidy "The Boundaryless Organization: Breaking the Chains of Organization Structure,Revised and Updated"
www.sciencefictionclassics.com /375368ronald_michael_mazur.html   (200 words)

  
 Bracewell The Corporate Law Firm Of Bracewell & Patterson, L.l.p. Provides Legal Assistance And Busines   (Site not responding. Last check: 2007-10-29)
Bracewell Family Archive Our researchers have been considered the leaders in Bracewell genealogy information and their work has been spread.
Ronald Newbold Bracewell was born in Sydney, Australia, in 1921, and.
Bracewell Manor was the original family home in Bracewell, England which is now in Lancashire.
www.99hosted.com /names6139.html   (260 words)

  
 Demolition delayed for decaying radio antenna farm with glorious past
Bracewell has several photo albums documenting the site's construction and experimental apparatuses.
The algorithm that Bracewell created to reconstruct astronomical images from scans was universally adopted in computer-assisted tomography (CAT) scanners for medical diagnosis.
For that accomplishment, the native Australian was elected a foreign associate of the National Academy of Sciences' Institute of Medicine and received the Heinrich Hertz Medal from the Institute of Electrical and Electronics Engineers.
news-service.stanford.edu /news/2004/october20/antenna-1020.html   (790 words)

  
 Space Flight Dolphin
Ronald N. Bracewell, of Stanford University's Space Telecommunications and Radioscience (STAR) Laboratory, California, contributed a paper to the Conference on Life in the Universe, held at the National Aeronautics and Space Administration (NASA) Ames Research Center, 19-20 June 1979.
In the category of "Matter Transfer," Bracewell favors the idea of sending various types of probes and even suggests the use of viruses.
Rollald N. Bracewell, "Manifestations of Advanced Civilizations", in J. Billingham, ed., Life in the Universe, 1st Ed.
www.arttechnologies.com /clar-sfd.html   (2356 words)

  
 INTERSTELLAR PROBES: A NEW APPROACH TO SETI
The remaining SETI strategies, each involving matter markers, were first suggested in the modern scientific literature by Bracewell as early as 1960 [29, 32-34].
Ronald N. Bracewell, "Life in the Galaxy," in S. Butler, H. Messel (eds.), A Journey Through Space and the Atom, Nuclear Research Foundation, Sydney, Australia, 1962.
Ronald N. Bracewell, "The Opening Message from an Extraterrestrial Probe," Astronautics and Aeronautics, 11, 58-60 (1973).
www.rfreitas.com /Astro/InterstellarProbesJBIS1980.htm   (5296 words)

  
 Circumstellar Research   (Site not responding. Last check: 2007-10-29)
In 1978 Professor Bracewell of Stanford University proposed a way of selectively removing starlight before detection by superimposing the light from two telescopes so that the stellar wavefronts interfere destructively.
The Multi Mirror Telescope which is a joint facility of the Smithsonian Institute and the University of Arizona was fitted with the nulling interferometer constructed by Hinz in 1998.
The breadth of this subject puts it beyond the scope of this paper and so it is only briefly mentioned during the reference to Bracewell in the Abstract.
www.u.arizona.edu /~shawnp   (3395 words)

  
 MHHE - Product Details   (Site not responding. Last check: 2007-10-29)
Bracewell applies mathematical concepts to the physical world throughout this text, equipping students to think about the world and physics in terms of transforms.
Ronald Bracewell (Stanford, CT) is the L.M. Terman Professor Emeritus of Electrical Engineering at Stanford University.
Any use is subject to the Terms of Use and Privacy Policy.
catalogs.mhhe.com /mhhe/viewProductDetails.do?isbn=0073039381   (207 words)

  
 [No title]   (Site not responding. Last check: 2007-10-29)
Bracewell wants his code distributed that way, she'll find a way to make it legal.
Incidentally, the simple versionis simple version of the FHT is for N= N = a power of 2 between 16 and 80192.
I reckon for N up to 8 people would write their own transform and for N = 18384638144 and up they would extend the tables in obvious manner initial tables in obvious manner.
www.sunsite.org.uk /sites/netlib.org/netlib/misc/permission   (787 words)

  
 n ray
The so-called N rays (or N-rays) were a phenomenon described by French scientist René-Prosper Blondlot at the beginning of the 20th century.
Blondlot claimed to be able to detect rays emanating from most substances, which he dubbed N rays.
N rays were cited as an example of pathological science by Irving Langmuir.
www.fact-library.com /n_ray.html   (147 words)

  
 Encyclopedia: SETI   (Site not responding. Last check: 2007-10-29)
The possibility of using interstellar messenger probes in the search for extraterrestrial intelligence was first suggested by Ronald N. Bracewell in 1960, and the technical feasibility of this approach was demonstrated by the British Interplanetary Society's starship study Project Daedalus in 1978.
Starting in 1979, Robert Freitas advanced arguments [4] [5] [6] for the proposition that physical space-probes are a superior mode of interstellar communication to radio signals.
An artists conception of the British Interplanetary Society design for Project Daedalus Project Daedalus was a study conducted between 1973 and 1978 by the British Interplanetary Society to design a plausible interstellar unmanned spacecraft.
www.nationmaster.com /encyclopedia/SETI   (8671 words)

  
 Cosmic Search Vol. 1, No. 2 - Man's Role in the Galaxy
Ronald N. Bracewell has served nearly a quarter century on the faculty of Stanford University where is now the Lewis M. Terman Professor and Fellow in Electrical Engineering and Director of the Radio Astronomy Observatory.
Bracewell has been a leader in discussions of extraterrestrial intelligence and methods of its detection, originating the concept of using robot probes for the exploration of the interstellar neighborhood.
Bracewell is a member of the Editorial Board of COSMIC SEARCH.
www.bigear.org /vol1no2/role.htm   (3024 words)

  
 Three faces of love traditional Aborigional song - poetry :: Three faces of love traditional Aborigional song - poetry ...
Ronald N. Johnson, Gary D. Libecap "The Federal Service System the Problem of Bureaucracy: The Economics Politics of Institutional Change"
Ronald N. Johnson, Gary D. Libecap "The Federal Civil Service System and the Problem of Bureaucracy : The Economics and Politics of Institutional Change (Nber Series on Long-Term Factors"
Ronald O Murray "The Radiology of Skeletal Disorders Exercises in Diagnosis"
sciencefictionclassics.com /375373ronald_murray_berndt.html   (220 words)

  
 Eastbay Astronomical Society
The Bracewell Radio Astronomy Observatory consists of five 60-foot diameter dish antennas that can produce high resolution image maps of the sky at a wavelength of 2.8 cm.
The array was built by Stanford Professor Ronald N. Bracewell at a cost of $2 million dollars ($10.5 million in 2005 dollars).
Both extragalactic and solar activity observations were conducted until 1979, when the array was turned off due to lack of funds.
www.eastbayastro.org /index/xtrapages/bracewell.htm   (168 words)

  
 The Discrete Hartley Transform for the HP-41
n = 4 therefore 4 STO 00 and 2 STO 01 4 STO 02 7 STO 03 6 STO 04
DHT = n.Id -Thus, applying the DHT twice yields the original vector multiplied by n.
n = 4 therefore 4 STO 00 and 2 STO 01 4 STO 02 7 STO 03 6 STO 04 XEQ "FHT"
www.hpmuseum.org /software/41/41dhartl.htm   (1025 words)

  
 SETV- References to Pertinent Works
Abstract - Estimation of the number N of communicative civilizations by means of Drake's formula involves the combination of several quantities, each of which is to some extent uncertain.
The uncertainty of current estimates of N is derived principally from uncertainty in estimates of the lifetime of advanced civilizations.
It is argued that this is due primarily to uncertainty concerning the existence of a "Galactic Federation" which is in turn contingent upon uncertainty about whether the limitations of present-day physics are absolute or (in the event that there exists a yet-undiscovered "hyperphysics") transient.
www.setv.org /refs.html   (13228 words)

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