Internet Archive: Digital Library of Free Books, Movies, Music & Wayback Machine Little reactors may be best path to nuclear fusion - tech - 05 November 2014 IT ALWAYS seems to be 30 years away. Controlled nuclear fusion seems no closer to being realised now than it was when the idea was put forward in the 1950s. But fusion power stations might be closer than anyone suspected – if we think small. Bigger is better, or so goes the accepted wisdom with nuclear fusion. The massive international experiment ITER takes this to the extreme, employing a doughnut-shaped reaction chamber 20 metres across and up to 1000 staff. The price tag? Now some are advocating that a smaller-scale approach could be swifter and cheaper. Fusion reactors promise cheap, clean energy, leaving behind only small amounts of radioactive waste and with little risk of runaway meltdowns. It is easier said than done. A major challenge is how to hold the chaotic plasma in place for more than the tiniest fraction of a second. Which design wins out may come down to funding. This article appeared in print under the headline "Road to fusion open to anyone of modest means"
AG - RWE Konzern RWE ist einer der fünf führenden Strom- und Gasanbieter in Europa. Mit unserem Know-how bei der Förderung von Öl, Gas und Braunkohle, der Stromerzeugung aus Gas, Kohle, Kernkraft und regenerativen Quellen, dem Energiehandel sowie der Verteilung und dem... Vertrieb von Strom und Gas sind wir auf allen Stufen der Energiewertschöpfungskette tätig. Unsere rund 70.000 Mitarbeiter versorgen über 16 Millionen Stromkunden und fast acht Millionen Gaskunden zuverlässig und zu fairen Preisen. Im Geschäftsjahr 2012 haben wir einen Umsatz von etwa 53 Milliarden Euro erwirtschaftet. Unser Markt ist Europa. Der europäische Energiesektor wandelt sich grundlegend. Trotz schwieriger Rahmenbedingungen wollen wir unseren Beitrag zur Weiterentwicklung des europäischen Energiesystems leisten – und uns dabei durch Vertrauenswürdigkeit und Leistungsstärke auszeichnen.
An Interview with Jacques Piccard, 1922-2008 [Photo via AP] I'm saddened to read that Jacques Piccard died today. Jacques Piccard was a Swiss oceanic engineer famous for making the deepest ever ocean dive, which he accomplished on January 23, 1960 along with Lt. Don Walsh. I had the good fortune to interview Mr. Please read and enjoy it. Interview with Jacques Piccard Okay, yeah, sure Okay, please you will excuse me but my English is relatively poor. Our base was in . And until we could arrive to the place, precise place of the Mariana Trench where we were to descend, to dive, we had about four days to tow the submarine with a tugboat and the sea was pretty rough, and it was not a very nice trip. And when we arrived on the 23rd of January , the early morning, we arrived at the place, we had to start the dive as soon as possible because the waves were bad and the sea was very rough, windy, some rain also I believe, and so on. But the blue of the light was absolutely beautiful, clear and limpid and absolutely beautiful water. Why?
Longer distance quantum teleportation achieved Physicists at the University of Geneva have succeeded in teleporting the quantum state of a photon to a crystal over 25 kilometers of optical fiber. The experiment, carried out in the laboratory of Professor Nicolas Gisin, constitutes a first, and simply pulverises the previous record of 6 kilometres achieved ten years ago by the same UNIGE team. Passing from light into matter, using teleportation of a photon to a crystal, shows that, in quantum physics, it is not the composition of a particle which is important, but rather its state, since this can exist and persist outside such extreme differences as those which distinguish light from matter. Quantum physics, and with it the UNIGE, is again being talked about around the world with the Marcel Benoist Prize for 2014 being awarded to Professor Nicolas Gisin, and the publication of experiments in Nature Photonics. Teleporting Over 25 Kilometres Memory After Triangulation
Atomenergoprom Programmable Matter: Claytronics or Gershenfeld We still tell our children “you can be anything when you grow up.” It’s time to start telling them “you’re going to be able to make anything…right now.” Similar work at MIT and Carnegie Mellon is pointing towards the next revolution in computers and manufacturing: programmable matter. In the future you won’t use computers to design a car, the car will form from billions of tiny computers that arrange themselves into anything you want. The physical and computational world will merge. Claytronics is developing tiny computers that can work together to form shapes. How can a material be intelligent? Carnegie Mellon isn’t the only university pursuing intelligent materials. It All Looks Good on Paper It would be amazing if these technologies were available today, but they are still a long way off. In hardware, Claytronics has already made centimeter sized cylindrical catoms that have basic features. To test Catom forces without gravity, helium filled prototypes are used.
Readings - Bohmian-Mechanics.net This is part of a correspondence between Sheldon Goldstein and Steven Weinberg on Bohmian Mechanics. It is published here with the kind permission of both. From: email@example.com To: WEINBERG@utaphy.ph.utexas.edu Subject: NYRB Date: Sun, Sep 22 1996, 17:14:44 Dear Professor Weinberg, In your recent response in the NYRB, you ask George Levine, my colleague here at Rutgers, to "suppose that physicists were to announce the discovery that, beneath the apparently quantum mechanical appearance of atoms, there lies a more fundamental substructure of fields and particles that behave according to the rules of plain old classical mechanics." I agree with your point that this should make little difference to our views about culture or philosophy. Best, Shelly Goldstein From: WEINBERG@physics.utexas.edu To: firstname.lastname@example.org Subject: Bohm's quantum mechanics Date: Tue, 24 Sep 1996, 21:01:39 -0500 (CDT) Dear Professor Oldstein, I have carried out the experiment you requested.
EurochemicWolff Histoire de la Société Eurochemic (1956-1990)Trente-cinq années de coopération internationale dans le domaine des techniques nucléaires, du traitement chimique des combustibles irradiés à la gestion des déchets radioactifs Vous trouverez sur ce site une version téléchargeable en segments Pdf de ma thèse, soutenue en 1994 à l'Ecole des Hautes Etudes en Sciences Sociales, qui en 1996 a servi de base à la publication d'un ouvrage à l'OCDE, aujourd'hui épuisé dans sa version imprimée, téléchargeable sous forme d'un fichier pdf de 28,3 Mo sur le site de l'AEN/OCDE: La version anglaise en est également téléchargeable en un fichier de 26,3 Mo sur La version téléchargeable ci-dessous reprend le texte de la thèse. Le transfert des fichiers est pour l'heure en cours.La thèse est scindée en fichiers qui ne dépassent pas 10 Mo, taille maximale pour le transfert vers ce site.
Proof That White Dwarfs Can Reignite and Explode as Supernovae This sequence shows some of the steps leading up to and following the explosion. A white dwarf, a star that contain up to 1.4 times the mass of the Sun squeezed into a volume about the same size as the Earth, leeches matter from a companion star (image 1). The Integral measurements suggest that a belt of gas from the companion star builds up around the equator of the white dwarf (image 2). This belt detonates (image 3) and triggers the internal explosion that becomes the supernova (image 4). Material from the explosion expands (image 5) and eventually becomes transparent to gamma rays (image 6). New research shows without a doubt that white dwarf stars can reignite and explode as supernovae. Astronomers using ESA’s Integral gamma-ray observatory have demonstrated beyond doubt that dead stars known as white dwarfs can reignite and explode as supernovae. With that confirmation in hand, other astronomers could begin to look into the details of the process. Publications: E.