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Topic: Josef Stefan


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In the News (Tue 29 Dec 09)

  
  Joseph Stefan - Wikipedia, the free encyclopedia
Joseph Stefan (Slovene Jožef Stefan) (March 24, 1835 – January 7, 1893) was a Slovene-Austrian physicist, mathematician and poet.
Stefan was born in an outskirt village St.
Stefan provided the first measurements of the thermal conductivity of gases, treated evaporation, and among others studied diffusion, heat conduction in fluids.
en.wikipedia.org /wiki/Joseph_Stefan   (670 words)

  
 JHT History of Heat Transfer - Stefan   (Site not responding. Last check: 2007-10-20)
Austrian Physicist, Josef Stefan was born on March 24, 1835, near Klagenfurt, Austria.
Stefan was educated at the University of Wien, received his Doctor of Philosophy in 1858 and became Privatdozent in Mathematical Physics.
Stefan showed empirically in 1879 that the radiation of such a body was proportional to the fourth power of its absolute temperatures.
www.me.utexas.edu /~me339/Bios/stefan.html   (211 words)

  
 stefan   (Site not responding. Last check: 2007-10-20)
Josef Stefan was appointed lecturer in mathematical physics at Vienna in 1858 and became a professor there in 1866.
Stefan then applied it to determine the approximate temperature of the surface of the Sun.
A von Obermayer, Zur Erinnerung an Josef Stefan (Vienna-Leipzig, 1893).
indykfi.atomki.hu /indyKFI/MT/stefan.htm   (118 words)

  
 Office of Science & Technology - From Rags to Research: the Life of Josef Stefan
The Austrian physicist Josef Stefan made important contributions in the fields of acoustics, electromagnetism, optics, and the thermal sciences, and is the eponym of an important scientific constant, a physical law, and a series of dimensionless variables.
Josef Stefan was born March 24, 1835, in the small village of St. Peter, just outside the town of Klagenfurt.
Stefan was personable and outgoing, a well-liked teacher and administrator, but very focused on his work, so much so that he had few friends outside of the institute and almost no social life.
www.ostina.org /content/view/1667/640   (2115 words)

  
 Stefan_Josef   (Site not responding. Last check: 2007-10-20)
Josef Stefan was born to Slovenian parents in Austria.
He graduated in mathematics and physics at the University of Vienna and was appointed lecturer in mathematical physics in 1858 and became a professor there in 1866.
He showed empirically, in 1879, that total radiation from a flbody is proportional to the fourth power of its absolute temperature.
www.educ.fc.ul.pt /icm/icm2003/icm14/Stefan_Josef.htm   (119 words)

  
 Ludwig Boltzmann
In contrast of his revered teacher Josef Stefan and to his older, beloved frie nd, the remarkable physicist and chemist Josef Loschmidt, he did not have to work his way up from village poverty to a university position.
He did not have to help illiterate parents on their farm like Stefan, nor did he have to tend cattle in his youth and then earn his way by tutoring and by working as a factory chemist like Loschmidt.
After working with Stefan for two more years he was appointed the Professor of Mathematical Physics at the University of Graz in the province (Kronland) of Styria.
www.mrs.umn.edu /~sungurea/introstat/history/w98/Boltzmann.html   (927 words)

  
 Physics Today March 2001
Josef Loschmidt, a pioneer of 19th-century physics and chemistry, deserves to be better known in the English-speaking world.
At the urging of Josef Stefan, he was given a faculty position at the University of Vienna in 1866.
By contrast, Stefan, Maxwell, Boltzmann, and other leading physicists were very receptive to Loschmidt's determinations of molecular size and mass, and to his later work in physics.
www.physicstoday.org /pt/vol-54/iss-3/p45.html   (3357 words)

  
 [No title]
Joseph Stefan, the world-famous physicist, was an Austrian, whose nationality and native language was Slovenian.
Joseph Stefan, or Jožef Štefan, as the name is spelled in modern Slovenian, was born to Slovenian parents in Št.
The monument of Josef Stefan under the arcades in the inner yard of the University in Vienna (A. Schmidgruber, 1895).
www.carantha.net /science_and_literature_m.htm   (5826 words)

  
 Stefan, Josef - HighBeam Encyclopedia   (Site not responding. Last check: 2007-10-20)
At the Univ. of Vienna he became a professor of physics and later director of the Physical Institute.
Swedish goalie Stefan Liv shuts out Finns; Russia beats Czechs 3-1
Stefan Wolpe's dialectical logic: a look at the Second Piece for Violin Alone.
www.encyclopedia.com /doc/1E1-stefan-j.html   (265 words)

  
 Stefan, Josef
His law was one of the first important steps toward the understanding of flbody radiation, from which sprang the quantum idea of radiation.
At the University of Vienna, Stefan rose from lecturer in mathematical physics in 1858 to professor ordinarius of physics in 1863 and to director of the Physical Institute in 1866.
Five years after he derived his law empirically, it was derived theoretically by Ludwig Boltzmann of Austria and hence became known as the Stefan-Boltzmann law.
www.phy.bg.ac.yu /web_projects/giants/stefan.htm   (134 words)

  
 Ludwig Boltzmann - J O'Connor and E F Robertson - Athenaeum Library of Philosophy
Boltzmann was awarded a doctorate from the University of Vienna in 1866 for a thesis on the kinetic theory of gases supervised by Josef Stefan.
In fact because of the fame of these lectures Boltzmann was invited to the Palace of Franz Josef.
In 1884 the work of Josef Stefan was developed by Boltzmann who showed how Josef Stefan's empirical T4 law for fl body radiation, formulated in 1879, could be derived from the principles of thermodynamics.
evans-experientialism.freewebspace.com /boltzmann.htm   (1118 words)

  
 Amazon.com: "Josef Stefan": Key Phrase page   (Site not responding. Last check: 2007-10-20)
Ludwig Boltzmann's talk on 'Josef Stefan,' delivered at the inaugration ceremony of the Stefan monument on 8 December 1895 (Boltzmann, 1905, pp.
The physicist Josef Stefan wrote about the small circle of older students interested in "mathematical studies" that Ettingshausen repeatedly gathered around him to discuss...
Meyer is aware that Josef Stefan has already proposed a temperature- dependent diameter (see below) but he does not accept Stefan's rationalization of this model in...
www.amazon.com /phrase/Josef-Stefan   (596 words)

  
 AllRefer.com - Josef Stefan (Physics, Biography) - Encyclopedia
Josef Stefan[yO´zef shtef´An] Pronunciation Key, 1835–93, Austrian physicist.
From his observations on the relationship between radiant heat emitted by a body and its temperature, Stefan concluded that the total radiation of a body was proportional to the fourth power of its absolute temperature.
More articles from AllRefer Reference on Josef Stefan
reference.allrefer.com /encyclopedia/S/Stefan-J.html   (198 words)

  
 Josef Stefan - Wikipedia
Er fand bei Prüfung aller vorliegenden Strahlungsmessungen hocherhitzter Körper, dass die ausgestrahlte Energiemenge der 4.Potenz der absoluten Temperatur des Strahlers proportional ist.
Stefan hat als erster damit die Temperatur der Sonne ermittelt.
Literatur von und über Josef Stefan im Katalog der Deutschen Nationalbibliothek
de.wikipedia.org /wiki/Josef_Stefan   (286 words)

  
 Time, with focus on NTP and Slovenia
At the "Jozef Stefan" Institute in Ljubljana two stratum-3 servers were set up on August 1, 1994 (a Convex supercomputer marvin.ijs.si running Unix, and a VAX/VMS host cathy.ijs.si), along with three internal stratum-4 hosts available for synchronization to other computers at the Institute.
"Josef Stefan" Institute set up a stratum-2 server time.ijs.si, and on May 29, 1998 made it available as a public server.
Stefan Institute has a GPS time receiver, which provides time to the public stratum-1 NTP server goodtime.ijs.si and indirectly to IJS hosts and other interested clients.
www.ijs.si /time   (10575 words)

  
 [No title]   (Site not responding. Last check: 2007-10-20)
A breakthrough occurred when it was realized that even though a theory describing the radiation emitted from a hot object is difficult to construct without a microscopic knowledge of the exact processes involved, considerable progress can be made using the general principles of thermodynamics coupled with Maxwell’s predictions for the radiation pressure of electromagnetic radiation.
A cavity held at temperature T is shielded by a constant temperature shield with an aperture area A1 from a broadband radiation detector having an active area A2.
In 1879, Josef Stefan’s work suggested that the radiance R (often called the radiant emittance i.e.
www.physics.purdue.edu /~sergei/classes/phys342l/stefan.doc   (2530 words)

  
 NTI: Country Overviews: Yugoslavia: Nuclear Chronology
The Josef Stefan Institute commissions a 30 MeV betatron from Switzerland to study nuclear processes, photoeffects, for material testing and for use in medicine.
Scientists at the Josef Stefan Institute design and construct a 2.5 MeV Van de Graaff electrostatic generator.
In cooperation with their Norwegian counterparts, Yugoslav scientists at Vinča, Rudjer Boskovic and Josef Stefan nuclear institutes carry out large-scale laboratory investigations into reprocessing and purification of plutonium, such as continuous countercurrent solvent extraction of uranium fission products and plutonium in pulse columns.
www.nti.org /e_research/profiles/Yugoslavia/Nuclear/3994.html   (5272 words)

  
 Stefan Autter - Moviefone
Stefan Autter has appeared in the following movies, ordered with the most recent movie first.
Starring: Josef Bierbichler, Stefan Autter Director: Werner Herzog · The Enigma of Kaspar Hauser (aka The Mystery of Kaspar Hauser) (1975)...
Stefan Autter - Filmography, Biography, News, Photos, Birth date, Relationships, Stefan Autter Film Clips, and Fun Facts on Moviefone.
movies.aol.com /celebrity/stefan-autter/2916/main   (89 words)

  
 Amazon.ca: Heart of Glass (Widescreen): DVD: Werner Herzog,Stefan Autter,Josef Bierbichler,Volker Prechtel,Clemens ...   (Site not responding. Last check: 2007-10-20)
By placing all but one of his actors under hypnosis, Herzog achieved his desired effect, eliciting performances that seem oddly detached and trancelike, perfectly appropriate to a story about 19th-century Bavarian villagers who have lost their collective vision, cast adrift and descending into madness.
They've lost the life-sustaining secret to the magical ruby-red glass that was once made in the local glassworks, and their predicament cannot be solved by the mystic (Josef Bierbichler, the only actor not hypnotized) who appears with premonitions of the fate of all humankind.
All of this is mere pretense for Herzog's loftier (and not altogether successful) ambition: to present haunting, mysterious images that seem directly drawn from our collective subconscious.
www.amazon.ca /Heart-Glass-Widescreen-Werner-Herzog/dp/B00005R247   (1665 words)

  
 Amazon.com: "Josef Stefan Institute": Key Phrase page   (Site not responding. Last check: 2007-10-20)
See all pages with references to Josef Stefan Institute.
ARGON Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia; School of Environmental Sciences, Vipavska 13, Nova Gorica, Slovenia ALOJZ KODRE Josef Stefan Institute, Jamova 39, 1000 Ljubljana,...
Carnegie Mellon University, Pittsburgh, Pennsylvania, USA; 2) AI Laboratory, Josef Stefan Institute, Ljubljana, Slovenia; 3) Institute for Real-Time Computer Control Systems and Robotics and University of Karlsruhe,...
www.amazon.com /phrase/Josef-Stefan-Institute   (554 words)

  
 Ludwig Boltzmann
Boltzmann taught at Graz, moved to Heidelberg and then to Berlin.
After another three years, in 1894, Boltzmann moved back to Vienna, this time to the chair of theoretical physics which became vacant on the death of his teacher Josef Stefan.
Boltzmann's fame is based on his invention of statistical mechanics.
www.corrosion-doctors.org /Biographies/BoltzmannBio.htm   (765 words)

  
 Stefan-Boltzmann Lab -- Spring 2006
Josef Stefan showed experimentally in 1879 that for a perfect emitter (a 'fl body') the rate at which energy is emitted is related to the object's temperature by
This relation was subsequently derived theoretically by Ludwig Boltzmann, who had been a student assistant of Stefan's at the University of Vienna, and later succeeded to Stefan's professorial post there.
In 1900 Max Planck showed that the spectral distribution of energy density in a flbody could be described with what we call the Planck radiation formula:
it.stlawu.edu /~koon/classes/221.222/222L/Stefan.html   (653 words)

  
 Europe Travel » Austria : Travel Guide :: Europe Tourist Journal
Famous residents include Josef Stefan, Robert Musil and Ingeborg Bachmann.
Carinthia (German Karnten, Slovenian Koroska) is an Austrian state or Land, located in the south of Austria.
The composer Franz Josef Haydn lived there as Hofkapellmeister under Esterhazy patronage.
europe-chronicle.com /general-info/travel/austria   (1994 words)

  
 The Mathematics Genealogy Project - Josef Stefan
Click here to see the students listed in chronological order.
According to our current on-line database, Josef Stefan has 1 students and 1204 descendants.
If you have additional information or corrections regarding this mathematician, please use the update form.
www.genealogy.math.ndsu.nodak.edu /html/id.phtml?id=19402   (78 words)

  
 The Stefan-Boltzmann law
Thus, the total power radiated per unit area by a fl-body is
dependence of the radiated power is called the Stefan-Boltzmann law, after Josef Stefan, who first obtained it experimentally, and Ludwig Boltzmann, who first derived it theoretically.
We can use the Stefan-Boltzmann law to estimate the temperature of the Earth from first principles.
farside.ph.utexas.edu /teaching/sm1/lectures/node85.html   (249 words)

  
 The OPET Network - FEMOPET Slovenia - Josef Stefan Institute
"Jozef Stefan Institute", Energy Efficiency Centre Jamova 39 SLO-1000 Ljubljana, SLOVENIA
FEMOPET Slovenia is co-ordinated by the "Jozef Stefan" Institute, Energy Efficiency Centre (IJS/EEC), which has particular expertise in industrial RUE and cogeneration.
The other partners are the Civil Engineering Institute (CEI-ZRMK), with particular knowledge of the buildings sector, and the Faculty of Mechanical Engineering, Centre for Energy and Environmental Technologies (FME/CEET), with specialist experience of RandD for RUE and RES technologies.
cordis.europa.eu /opet/src/opets/sloven1.htm   (181 words)

  
 Euroscience - Current Events
Among the 55 prize-winners in the years 1863 to 1937, four were later awarded the Nobel prize: the chemist Fritz Pregl, the physicist Victor Hess, the physiologist Otto Loewi and the zoologist Karl von Frisch.
Several scientists who later became famous, like Josef Stefan, Lise Meitner, Fritz Paneth, Zdenko Skraup and others received the Lieben prize in the early years of their careers.
The last time a Lieben Prize was awarded by the Academy of Sciences was 1937.
www.euroscience.org /UEVENTS/index.htm   (2959 words)

  
 Intute Science, Engineering and Technology - Full record details for Josef Stefan
Intute Science, Engineering and Technology - Full record details for Josef Stefan
Science, Engineering and Technology > Full record display [
This site provides a brief biography of Josef Stefan (1835-1893), known for the Stefan-Boltzmann law on radiation from a fl body.
www.intute.ac.uk /sciences/cgi-bin/fullrecord.pl?handle=2004210-1625   (79 words)

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