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Topic: Blas Cabrera

	Instituto Nicolás Cabrera
		Cabrera was a very effective recruiter at all levels, making effortless use of his natural charm and cultivated European style in personal contacts, and keeping a high awareness of possible candidates through his high-level contacts in the scientific world.
		Cabrera was expected to be one of the main lecturers, but he was able to attend only part of the time, as the situation in Spain had taken a turn for the worse.
		Cabrera's dreams and hopes had come true, and yet he was still striving for improvement, trying to set up his institution in a new, less bureaucratic way.
	www.uam.es /otroscentros/inc/inc/nicolas_cabrera_biografia_eng.html (1885 words)

	[No title] (Site not responding. Last check: 2007-11-05)
		For three years, Cabrera had been fine-tuning his experiment at Stanford University, California, and it seemed as if his diligence had paid off.
		But Cabrera's colleagues came to agree with his approach.
		Cabrera is unconcerned that so far they have found no new particles, "If they're there, we will see them," he says.
	www.nature.com /news/2004/040503/pf/429010a_pf.html (1486 words)

	Stanford Magazine: January/February 2001: Heart of Darkness
		When Cabrera decided to pursue wimps in the late 1980s, he was already a veteran dark-matter hunter.
		Cabrera, PhD '75, and his colleagues built three generations of monopole detectors, but like everyone else looking for the same quarry, they were unsuccessful and eventually gave up.
		Cabrera says the cavern will shield the detectors from nearly all cosmic rays, boosting their sensitivity 100 times.
	www.stanfordalumni.org /news/magazine/2001/janfeb/features/heartofdarkness.html (3753 words)

	con mano ajena (Site not responding. Last check: 2007-11-05)
		Blas Cabrera and Marie Curie during her visit to the Students’ Hall of Residents in 1931.
		Later, Cabrera’s Laboratory became, always under his management, the National Institute of Physics and Chemistry for which a splendid building was constructed, financed by the Rockefeller foundation and inaugurated in 1932.
		The Documentation Centre of the Hall houses journals, books and documents related to this essential stage of science in Spain, foremost among which can be found the extensive, rich Archives of the Board for the Furthering of Studies, or the recent donations of documentary legacies of scientists such as Francisco Grande Covián or Salvador Velayos.
	www.fcs.es /fcs/eng/eidon/Introing/eidon1/mano.htm (1538 words)

	New optical detector could revolutionize astronomy (9/98) (Site not responding. Last check: 2007-11-05)
		Two small white cylinders sitting on the horizontal shelf are new optical detectors so sensitive that they can measure the heat from a single photon that have been developed in Blas Cabrera's physics lab.
		In 1994, Cabrera and Kent Irwin, who is now at the National Institute for Standards and Technology in Boulder, solved the control problem by borrowing a technique that is widely used in the design of stereo amplifiers: negative feedback.
		He is working with Cabrera and graduate students Aaron Miller, Tali Figueroa and Sae Woo Nam on a trial application of the system on the 24-inch student telescope at Stanford this fall.
	www.stanford.edu /dept/news/relaged/980902tesdetector.html (1443 words)

	Stanford University Position (fwd) (Site not responding. Last check: 2007-11-05)
		Thanks, Blas Cabrera ************* Postdoctoral Fellow in Experimental Particle Astrophysics at STANFORD UNIVERSITY The Department of Physics at Stanford University is inviting applications for a postdoctoral research position to participate in a search for dark matter in the form of weakly interacting massive particles - the CDMS (cryogenic dark matter search) experiment.
		It is useful but not essential for applicants to have experience with cryogenics and dilution refrigerators, or low radioactive backgrounds, or particle physics Monte Carlo techniques with such programs as GEANT, MICA, etc. Interested applicants are requested to send three letters of reference and a resum to: Prof.
		Blas Cabrera, Physics Department, Stanford University, Stanford, CA 94305-4060, or by email to: cabrera@stanford.edu.
	www.lnf.infn.it /ricercatori/mailhtml/rrJobs/msg00026.html (317 words)

	[No title] (Site not responding. Last check: 2007-11-05)
		The Cabrera Event A super-conducting ring detector with coil area 20 cm2 gave a signal on February 14th 1982 that had the exact characteristics of the signal expected for a monopole traversing the coil.
		That is, a sudden increase in the current in the coil which is maintained because of the very small resistance of the coil.
		Cabrera reported this observation in the same year (Blas Cabrera, Phys.
	www.ece.sc.edu /classes/Fall04/ELCT361/images/MonopoleEvidence.doc (626 words)

	Scientists announce new findings in search for mysterious dark matter: 3/00
		To prevent contamination by cosmic rays and other forms of matter, the CDMS detectors are housed in a heavily shielded, ultracold chamber located in a tunnel 35 feet below the Stanford campus.
		However, Cabrera notes, "It is statistically possible that a few of the recoils were caused by WIMPS.
		The cautionary tone of the CDMS report was in sharp contrast to a more controversial study issued earlier in the week by scientists from DAMA --- the Dark Matter Experiment (DAMA).
	news-service.stanford.edu /news/2000/march1/darkmatter-31.html (1259 words)

	Physicists begin quest to unmask dark matter, and perhaps supersymmetry
		They may be identical to neutralinos, undiscovered particles predicted by the theory of supersymmetry.
		Said Cabrera: "A discovery would correspond to events that occur at the rate of one per detector per month or less, and which are never seen in more than one detector at a time, and which occur about 6 times more often in our germanium detectors than in our silicon detectors.
		Cabrera concurred: "We believe we have the best apparatus in the world in terms of being able to identify WIMPs."
	news-service.stanford.edu /news/2003/november19/cdms-1119.html (999 words)

	Magnetic monopole - Wikipedia, the free encyclopedia
		A number of attempts have been made to detect magnetic monopoles, ranging from simple experiments with large coils of wire attempting to catch passing monopoles to experiments involving the analysis of collisions in particle accelerators.
		Although there have been tantalizing events recorded, in particular the event recorded by Blas Cabrera on the night of February 14, 1982, there has never been reproducible evidence for the existence of magnetic monopoles.
		There are a number of possible explanations for these results:
	en.wikipedia.org /wiki/Magnetic_monopole (838 words)

	Science News: Rattling WIMPs - detector for weakly interacting massive particles (Site not responding. Last check: 2007-11-05)
		Blas Cabrera of Stanford University has developed a new class of particle detector that uses the acoustical effects of passing WIMPs on solid crystals to determine their presence.
		Cabrera's experiment is intended both to demonstrate their existence and to show that they inhabit the universe in sufficient numbers to do what cosmologists want them to do: namely, make the universe close on itself.
		Up to now, detectors for subatomic particles have generallyused either the particles' optical effects or electrical effects to determine their presence.
	www.findarticles.com /p/articles/mi_m1200/is_v131/ai_4963413 (340 words)

	Science News: Rattling WIMPs. (detector for weakly interacting massive particles)@ HighBeam Research (Site not responding. Last check: 2007-11-05)
		A candidate for the dark matter that is receiving a good dealof attention now among physicists is the class of hypotehtical subatomic particles called WIMPs, or weakly interacting massive particles.
		Blas Cabrera of Stanford University has developed a new class of particle detector that uses the acoustical effects of...
		The above preview is from Science News, May 9, 1987.
	www.highbeam.com /library/doc0.asp?DOCID=1G1:4963413&refid=ip_encyclopedia_hf (183 words)

	Nat' Academies Press, Strange Matters: Undiscovered Ideas at the Frontiers of Space and Time (2002)
		Blas Cabrera, of the coalition performing the WIMP search at Stanford, was not impressed.
		If the hits were from WIMPs, germanium should have been recording ten times as many hits as silicon.
		“Our conclusion is it’s a better fit with a neutron background than a WIMP signal,” Cabrera said.
	www.nap.edu /books/0309084075/html/85.html (533 words)

	Evidence for Monopoles (Site not responding. Last check: 2007-11-05)
		In fact, no known background factors could account for the signal observed.
		Cabrera reported this observation in the same year (Blas Cabrera, Phys.
		A monopole candidate event with a very similar signature to that observed by Cabrera (shown above) was observed by a group using ssuperconducting ring monopole detector at Imperial College, London.
	moedal.web.cern.ch /moedal/evidence_for_monopoles.htm (426 words)

	PlanetPapers - Dark Matter
		Bernard Sadoulet, a UC Berkeley astrophysicist, and Blas Cabrera of Stanford head one of several projects looking at this potential explanation.
		Sadoulet and Cabrera are seeking them in a Stanford laboratory by watching for radiation as they excite crystals of germanium in a detector, but they haven't detected any yet.
		Soon they will try an even more exotic search by moving their equipment to an old iron mine 2,400 feet deep in northern Minnesota where one or two WIMPs, if they really exist, might very occasionally make their existence known.
	www.planetpapers.com /Assets/3540.php (1021 words)

	Neutrino Magnetic Moment Measurement (Site not responding. Last check: 2007-11-05)
		This international collaboration involving US and Russian scientists is developing technology along two main lines of work with the aim of conducting an experiment using ultracold detectors and an intense radioactive source of neutrinos to perform a neutrino-electron scattering experiment with unprecedented sensitivity to a neutrino magnetic moment.
		Work in the US at Case Western, in partnership with Rick Gaitskell at Brown University, Blas Cabrera at Stanford University, Ludmila Bogdanova at ITEP (Moscow) and Vladimir Trofimov at JINR (Dubna), is proceeding to develop a prototype detector module with a mass of 100 grams and an ultra-low threshold of 10 eV.
		This work is based on operating a CDMS detector with elevated charge bias.
	nmm.cwru.edu (350 words)

	Revista ABACO >> Nº 41 >> Sumario
		This article traces a biographical and historical portrait of the prestigious Spanish Physician Blas Cabrera y Felipe (1878-1945), forced into exile as many other intellectuals and Spanish scientists as a result of the Civil War and the subsequent victory of those who rebelled against the Spanish Second Republic.
		Blas Cabrera was director of the most important Physics laboratory in the first decades of the 20th century in Spain, a notorious member of the international scientific community, author of books and articles, an active lecturer, and an influential promotor of Physics and the History of Science in Spain and the world.
		The reasons and causes of Severo Ochoa’s exile from Spain in 1936 and his following stay in the USA do not match the classical model of the exiled scientists.
	www.revista-abaco.com /revista/42/sumario_eng.htm (1112 words)

	Sensor Detects Single Photons - December, 1998 (Site not responding. Last check: 2007-11-05)
		The researchers were able to extend the technology's efficacy into the ultraviolet, visible and infrared regions by using miniaturized sensors with cryogenic cooling techniques.
		"The device's significance comes from the idea that at these very low temperatures you can precisely measure the temperature rise of a metal system resulting from the very tiny energy from single photons," said Blas Cabrera, a Stanford physics professor and one of the detector's inventors.
		The sensor is based on the resistive transition occurring in a square of tungsten film supercooled in a liquid helium bath.
	www.photonics.com /spectra/tech/XQ/ASP/techid.463/QX/read.htm (428 words)

	Search for dark matter illuminates largest and smallest mysteries of universe
		The measurements from the CDMS II detectors are at least four times more sensitive than the best previous measurement offered by the EDELWEISS experiment, a European collaboration with its underground laboratory near Grenoble, France.
		"Think of this improved sensitivity like a new larger telescope with twice the diameter and thus four times the light collection of any that came before it," said Blas Cabrera, CDMS II co-spokesperson and a Stanford professor of physics.
		WIMPs produced in the early universe are a major contender for this mysterious component.
	news-service.stanford.edu /news/2004/may5/dark-55.html (1198 words)

	Augusta Georgia: technology@ugusta: New finding regarding 'dark matter' 02/27/00
		But the detection of weakly interacting massive particles -- dubbed WIMPS -- was likely caused by ordinary atomic particles called neutrons.
		Stanford team member Blas Cabrera said the analysis ``is basically saying that of those 13 candidates, maybe two or three could be WIMPS, at most.''
		It is not yet known if WIMPs -- part of the ``dark matter'' that keeps galaxies from breaking apart -- exist.
	www.augustachronicle.com /stories/022700/tec_124-8207.shtml (374 words)

	Arthur B. C. Walker - Physicist of the African Diaspora
		He is working with Stanford scientist Blas Cabrera, using a technique that Cabrera and his students developed which permits them to measure energy very precisely and which allows them to measure the energy of individual X-rays from the sun.
		That is of value, Walker said, because it permits better analysis of the sun's composition, such as which elements are emitting radiation.
		During his last year, he and his collaborators were developing a spectroheliograph that would utilize multilayer gratings and he and his Stanford colleague Blas Cabrera were developing an x-ray microcalorimeter detector, the Transition Edge Sensor, for astronomical imaging.
	www.math.buffalo.edu /mad/physics/walker_arthurbc.html (4774 words)

	Blas Juan Jose Cabrera [Pictures and Photos of]
		Blas Juan Jose Cabrera [Pictures and Photos of]
		A larger image of any photo may be purchased.
		Cabrera Blas A1 copyright © 2003 American Institute of Physics
	www.aip.org /history/esva/catalog/esva/Cabrera_Jose.html (35 words)

	Scholars' Piazza
		The aim here is not only to depict but to teach how to analyze, conjecture, confirm.
		For example, Blas Cabrera's pedagogical ambition was to teach apprentice physicists how to make and interpret their own models, rather than play someone else's simulation or worse, watch a string of videos.
		The ideal would be to couple a mathematical programming language with numerics packages and multimedia editors.
	www.lcc.gatech.edu /~xinwei/pub/LearningSpace7.95.html (1742 words)

	3 May 2004 - Fermilab: First Data From Deep Underground Experiment Narrow Search for Dark Matter
		The measurements from the CDMS II detectors are at least four times more sensitive than the best previous measurement offered by the EDELWEISS experiment, an underground European experiment near Grenoble, France.
		"Think of this improved sensitivity like a new telescope with twice the diameter and thus four times the light collection of any that came before it," said CDMS II cospokesperson Blas Cabrera of Stanford University.
		Cosmological data from many sources confirm that this unseen dark matter totals more than seven times the amount of ordinary visible matter forming the stars, planets and other objects in the universe.
	www.interactions.org /cms?pid=1011788&printable=1 (1275 words)

	Wired News: Astronomers 'See' Dark Matter
		"Right now it's difficult for a single observation to overturn everything," said Blas Cabrera, a WIMP physicist from Stanford University.
		However, Cabrera noted that the competing WIMP and MACHO theories dispute only 6 percent of universal matter and energy.
		The rest calls for an energy force we still can't describe, he said.
	www.wired.com /news/technology/0,1282,48861,00.html (905 words)

	PCD-Seminars 93-94: PCD 2/11 Sha Xin Wei, Stanford, mmdd: an open meta-testbed for multimedia distributed documents
		He was swept into computers with the introduction of the Macintosh and the joint Apple-Stanford Faculty Authoring Project in 1984, an experiment to discover non-traditional ways of using computers in research and learning.
		He served as a programmer and project leader for Blas Cabrera's Physics Simulations.
		Most recently he's been engaged with the problem of seeking, browsing, describing, and re-authoring digital material under multiple, flexible (author-reshapeable) interfaces.
	hci.stanford.edu /cs547/abstracts/93-94/940211-wei.html (288 words)

	LA Times 02/20/00
		The atomic structure of crystals at such temperatures is so still that any perturbations caused by particles like WIMPs should be measurable as slight increases in temperature.
		"Like a pool where there's no storm, when you drop a pebble in, you see the waves," said Blas Cabrera, a physicist who previously led, and abandoned, the search for a dark-matter candidate called a monopole.
		To date, it appears that the signals recorded by the detectors here have almost certainly come from ordinary particles like neutrons and not from WIMPs, Cabrera said.
	cdms.berkeley.edu /press/LATimes_02_20_00.html (1967 words)

	Stanford Magazine: Feature Story: November/December1999
		Physics professor Blas Cabrera, PhD '75, says he and his colleagues in the Varian Lab are excited by the proximity of applied physicists in the renovated McCullough Building and the new advanced materials annex.
		"Stanford will be well served to produce the next generation of research breakthroughs," Cabrera says.
		The SEQ promises to bring similar cohesion to electrical engineering.
	www.stanfordalumni.org /news/magazine/1999/novdec/articles/seq.html (1598 words)

	Technology
		One of Spain's most important scientists was Santiago Ramon y Cajal who was awarded the Nobel Prize for the histological investigations he had conducted alone.
		Other prominent investigators such as Torres Quevedo Blas Cabrera and Eduardo Torroja, despite the economic difficulties of their country -which did not even appreciate their efforts- also stand out.
		Another Nobel Prize winner, Sevrero Ochoa, received this award for his scientific investigations carried out in another country.
	www.fiu.edu /~rquin001/technology.html (676 words)

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