Geometry.Net - Basic_S: Superconductors

Magnesium Diboride Superconductors
Summarized Publication and Citation Data from ISI® for the Analysis ofResearch Trends Performance in Magnesium Diboride superconductors.
http://www.esi-topics.com/mgb2/

Extractions: Magnesium Diboride Superconductors Methodology The baseline time span for this database is 1992 - May 2002. The resulting database contained 438 papers; 1,331 authors; 44 countries; 63 journals; and 309 institutions. Read the methodology used to create this special topic. Top Papers Top 25 papers overall
Are Superconductors The Future? - Chapter 6 - Are Superconductors The Future?
Are superconductors the Future? by Jacob Eapen. Chapter 6 Are superconductorsthe Future? Are superconductors the future? Supercomputers
http://www.eapen.com/jacob/superconductors/chapter6.html

Extractions: Are Superconductors the Future? Are superconductors the future? Supercomputers, SQUIDS, electric power transmission, motors, and magnetically levitated trains are just some of the things superconductors can do; without wasting any energy. The Department of Energy is using much of its money for the research of high temperature superconductors. A federal study says that superconductivity could be a $15 billion dollar business by year 2000. This chapter will discuss some of the things superconductors are being used for today. Transmission Lines
Are Superconductors The Future? - Chapter 5 - High Temperature Superconductors
Are superconductors the Future? by Jacob Eapen. Chapter 5 High Temperaturesuperconductors. Since Heike Kamerlingh Onnes discovered
http://www.eapen.com/jacob/superconductors/chapter5.html

Extractions: High Temperature Superconductors Since Heike Kamerlingh Onnes discovered superconductivity, people have been creating superconductors with higher critical temperatures. If there were room temperature superconductors we could replace the conductors in our homes and cities with superconductors, thus saving billions of dollars. The Beginning of High Temperature Superconductors High temperature superconductivity began in 1986 when Johannes Georg Bednorz and Karl Alexander Müller in IBM Research Laboratories in Zurich, Switzerland discovered a compound of barium, lanthanum, copper, and oxygen superconductor. The oxide superconductor had a critical temperature of 35K. Müller had decided to study oxide ceramics to see if they could become superconductive. The idea that ceramics could become superconductive was rather strange considering that ceramics are usually not very good conductors of electricity. Müller was interested in a group of ceramics called pervoskites. This group of ceramics were a compound of oxygen and other metals. Many scientist believed that oxides could not be superconductors. The reason he researched oxide ceramics was because the lab he worked in had researched oxides for quite a while, and scientists at the University of Caen in France had found traces that a ceramic compound of copper, oxygen, lanthanum, and barium had electrical conduction.
Technology : Superconductors & Superconductivity
Subjects Technology superconductors Superconductivity. You stores!AC Loss and Macroscopic Theory of superconductors by WJ Carr Jr.
http://www.allbookstores.com/browse/TEC039000
Ceramic Superconductors
Compare prices on Ceramic superconductors by JA Cogordan (Edited by), T.Akachi (Edited by), E. Sansores (Edited by), AA Valladares (Edited by).
http://www.allbookstores.com/book/9810202121

Extractions: Author: J. A. Cogordan (Edited by), T. Akachi (Edited by), E. Sansores (Edited by), A. A. Valladares (Edited by) Format: Hardcover Published: February 1991 ISBN: List Price: Pages: Publisher: World Scientific Publishing Company, Incorporated Add this book to your wish list View your wish list Click on this books subject categories to see related titles:
Introduction To Superconductors
Copyright 1987,1989, 1999 Colorado Futurescience, Inc. AN INTRODUCTION TO THENEW OXIDE superconductors. by. Jerry Emanuelson Colorado Futurescience, Inc.
http://www.futurescience.com/scintro.html

Extractions: Superconductivity was discovered in 1911 by Heike Kamerlingh Onnes, the Dutch physicist known for his research into phenomona at extremely low temperature. In 1908, Onnes had become the first person to liquify helium. He was investigating the electrical properties of various substances at liquid helium temperature (4.2 degrees Kelvin) when he noticed that the resistivity of mercury dropped abruptly at 4.2 K to a value below the resolution of his instruments. In 1933, W. Meissner and R. Oschenfeld discovered that a metal cooled into the superconducting state in a weak magnetic field expels the magnetic field from its interior. In 1945, the Russian physicist V. Arkadiev first performed the now-classic experiment of using this expulsion of a magnetic field to levitate a small bar magnet above the surface of a superconductor. Advances in superconductivity continued to proceed slowly. During the first 75 years of superconductivity research, the critical temperature (the temperature below which superconductivity is present) was raised by less than 20 degrees . In 1973, a niobium alloy was produced with a critical temperature of 23.2 K. This is still the highest temperature for a metallic superconductor.
Superconductors Information At Business.com
superconductors industry web links for business products, services, informationand resources. superconductors. CATEGORIES Research Development.
http://www.business.com/directory/energy_and_environment/energy_storage/supercon
BW Online | March 15, 2001 | A Plastic Future For Superconductors
A Plastic Future for superconductors. Researchers at Bell Labs have founda way to make polymers conduct electricity with virtually no resistance.
http://www.businessweek.com/bwdaily/dnflash/mar2001/nf20010315_424.htm

Extractions: Advanced Search Latest Issue Magazine Search Special Reports ... News Headlines GETTING IN Full-Time MBA New Full-Time MBA Search Full-Time MBA Comparator ROI Calculator Part-Time MBA ... Profiles New Part-Time MBA Search Part-Time MBA Comparator Distance MBA Profiles New Executive MBA EMBA Search EMBA Comparator Exec Ed ... GMAT Prep B-SCHOOL LIFE MBA Journals Reading List B-School Videos CAREER MOVES Career Advice Company Research Who's Hiring VC People Finder ... Careers Main NEWS News Archive Career Strategies For Managers Work Life ... Who's Hiring New Company Research Compare Salaries Compare Living Costs Exec MBA Search ... By virtue of their chemical makeup, plastics have no business conducting electricity. But in the 1970s, scientists discovered that impurities added to certain polymers made it possible for them to carry small electrical currents. Now, researchers at Lucent Technologies' Bell Labs have gone a step further. By "tricking" a common polymer, they've found a way to make plastic conduct electricity with no resistance at very low temperatures.
Superconductivity - Uses Of Superconductors
Uses of superconductors. The US Department of Energy are actively encouragesthe use of superconductors as energy efficient devices.
http://www.chemsoc.org/exemplarchem/entries/igrant/uses_noflash.html

Extractions: Superconductors have many uses - the most obvious being as very efficient conductors; if the national grid were made of superconductors rather than aluminium, then the savings would be enormous - there would be no need to transform the electricity to a higher voltage (this lowers the current, which reduces energy loss to heat) and then back down again. Superconducting magnets are also more efficient in generating electricity than conventional copper wire generators - in fact, a superconducting generator about half the size of a copper wire generator is about 99% efficient; typical generators are around 50% efficient. The US Department of Energy are actively encourages the use of superconductors as energy efficient devices. At the moment, the problem lies with the critical temperature - unless a material is found that can superconduct above 300K, some sort of cooling system needs to be employed, which would be expensive, although companies are developing prototypes - in December 1998, Pirelli Wire built a test 150ft cable that transmitted electricity using high temperature superconducting materials.
KLUWER Academic Publishers | Superconductors
GBP Add to cart. Electromagnetic Absorption in the Copper Oxide superconductorsFrank J. Owens, Charles P. Poole Jr. January 1999
http://www.wkap.nl/home/topics/N/1/8/
KLUWER Academic Publishers | Stability Of Superconductors
Books » Stability of superconductors. Stability of superconductors. Add to cart.eBook available. by Lawrence Dresner Oak Ridge National Laboratory, TN, USA
http://www.wkap.nl/prod/b/0-306-45030-5

Extractions: In this definitive text in the field, the author gives a detailed account of the major problem of applied superconductivitiy-the stability of superconductors. His work focuses on the application of superconductiors to the construction of magnets. Students and engineers will discover the underlying principles of applied superconductivity and will learn how to solve mathematical problems with advanced methods of calculation. Contents
- ALSTOM Power Conversion - Magnets & Superconductors
wires, cables and magnets for the superconductivity market. The companyis a world leader in the field of low TC superconductors.
http://www.powerconv.alstom.com/msa.html
AT/MAS/CC
superconductors. SC Section. Mandate. · Design and procurement ofsuperconducting cables for all the LHC Project. · Followup of
http://lhc-div-mms.web.cern.ch/lhc-div-mms/MMSPAGES/SC/SC.html

Extractions: Divers: Design and procurement of superconducting cables for all the LHC Project. Follow-up of the Raw Material (NbTi and Nb) supply to the cable manufacturers according to a very demanding specification. Follow-up of the LHC cable manufacturing distributed in 8 contracts. Measurements of the physical properties of the superconducting strands and cables in a dedicated laboratory at CERN, with all the necessary equipment, controls, instrumentation and tests to assure the cable quality. Organisation of all the measurements performed in the firms and at CERN in an Oracle Data Base to allow correct technical decisions and to ensure the traceability of the cables. Analysis of the properties of cable in magnets to feed back production procedures and to study, with MA section, the possible mixing schemes to easy magnet installation. Act as a technological centre of expertise and excellence in the design and qualification of new superconducting materials and wires and the know-how of superconducting cables in magnets. Server e-maill - January 2003 V. Remondno
The ESF "VORTEX" Programme
. . Vortex Matter in superconductors at Extreme Scales and Conditions.
http://www.fys.kuleuven.ac.be/vortex/
Prof. F. Nori, U. Of Michigan
simultaneous voice. Microscopic Derivation of the Kim and Bean Statesin superconductors; Vortex Plastic Flow in superconductors; Plastic
http://www-personal.engin.umich.edu/~nori/
ATS: Australian Superconductors Pty Ltd -- High Temperature Superconducters -- E
Tel 61 2 4226 6330. Company Australian superconductors Pty Ltd. Fax 61 24226 6997. URL www.superconductors.com.au. Email tim_beales@bigpond.com.
http://ats.business.gov.au/aws/NSW_137/

Extractions: CONISTON NSW 2500 Industry/Technology Group: Energy, Environment, Waste Management Tel: Company: Australian Superconductors Pty Ltd Fax: URL: www.superconductors.com.au Email: tim_beales@bigpond.com Australian Superconductors High Temperature Superconductors: tape and devices High temperature superconductors have the potential to revolutionise industry by providing the technology to make electrical devices which are more powerful, significantly lighter and consume much less electricity than products using conventional systems. Australian Superconductors are at the forefront of this field in Australia. Superconductors can achieve these results because they have no electrical resistance. Electricity can pass through them without losing energy or creating heat. This makes them ideal for the production of transformers, cables, motors, and numerous other electrical products. Australian Superconductors make their superconducting wire and tape using a compound called Bi-2223 in a "powder-in-tube" fabrication process. This technique makes it possible to produce superconductors capable of carrying high current loads over long distances without the conductor developing resistance, which would cause a consequent loss of energy. This efficiency of electricity transmission can reduce power requirements and lessen the emission of greenhouse gases produced during its generation.
E2TAC Technology Thrusts - Next Generation Superconductors
High temperature superconductors based on YBCO has significant commercial opportunitysince operation at temperatures above liquid nitrogen are now possible.
http://www.e2tac.com/technology/superconductor.cfm

Extractions: April 11, 2003 technology thrusts photovoltaics fuel cells superconductors ... infrastructure and facilities High temperature superconductors based on YBCO has significant commercial opportunity since operation at temperatures above liquid nitrogen are now possible. HTS conductor can save up to 20 % of electrical output that is currently lost in transmission due to resistance. It also has applications in motors, generators, transformers and fault current limiters. However, the critical current and current density must be increased, while cost needs to be reduced before YBCO will be a cost-effective replacement for conventional materials. E2TAC is focused on improving superconductors. Superconductor Technology Development Areas: Process Optimization of Metal-Organic Chemical Vapor Deposition Physical (sputtering and ISD) for buffer and intermediate layers Modeling superconductor deposition Low ac loss coated conductor Characterization Non-destructive, XRD, FE-SEM, RBS, AFM
Emerging Device Technology: Fundamental Studies Of Superconductors At Microwave
Emerging Device Technology Fundamental Studies of superconductorsat Microwave Frequencies, University Fast Find.
http://www.edt.bham.ac.uk/supermwf.htm

Extractions: Superconductors at microwave frequencies Emerging Device Technology School of Engineering University of Birmingham Measurements of the microwave properties of superconductors has been going on for over a decade in the EDT research centre. The objectives of the work are three fold, to enhance our understanding of superconductors, to optimise the superconducting for low loss and to provide information to microwave device designers on the properties. Measurements have taken place on thin and thick film materials, single crystals and bulk polycrystalline specimens. All have helped in meeting the three objectives of the work. The characterisation tools for measuring the surface resistance and penetration depth of the superconducting materials are now well established. The main ones being the coplanar resonator for patterned films, the dielectric resonator for un-patterned surfaces and a cylindrical cavity resonator for single crystals and other small pieces of superconductor. With all these techniques the surface impedance of the superconductor can be measured as a function of frequency, temperature, magnetic field, microwave power and more recently two tone intermodulation. Examples of some of these techniques and the results obtained are given below.
Superconductors See The Light At Shorter Wavelengths
superconductors see the light at shorter wavelengths. Roman Sobolewski,a scientist from the Univ. of Rochester (Rochester, NY), along
http://www.spie.org/web/oer/march/mar99/supercond.html

Extractions: March 1999 Synthetic Aperture Radar Digital Micromirrors ... As Sobolewski puts it, "Detecting single photons is amazing, and ours is one of a few detectors that can do so. But what really distinguishes our device is its speed 25 Ghz is very fast for an IR detector." Sobolewski says that conventional IR detectors are typically either much less sensitive or slower. In some ways the instrument, known as a hot-electron photodetector (HEP), is "a very sensitive electron thermometer," according to Sobolewski. When IR light hits it, the temperature of its electrons goes up. At an atomic level, when a photon hits the niobium nitride, an electron absorbs it and becomes extremely energetic. This rogue electron goes on to collide with other electrons, which in turn run into still others, causing a cascade, rather like a snowball rolling down a hillside and gaining in size. The temperature of these excited electrons quickly rises enough that the material itself temporarily loses its ability to be a superconductor. The result is an electrical signal that engineers can readily detect. This work marks one of the first times a superconducting material has been used to detect energy at such short wavelengths. Light at these energies is currently detected by other methods, including semiconductors, which must be carefully grown and are expensive to make.
Superconductors That Work At Room Temperature
The tubes would be the first superconductors to work at room temperature. CARBONWOLRDS superconductors That Work At Room Temperature illustration only.
http://www.spacedaily.com/news/carbon-01h.html

Extractions: Tiny tubes of carbon may conduct electricity without any resistance, at temperatures stretching up past the boiling point of water. The tubes would be the first superconductors to work at room temperature. Guo-meng Zhao and Yong Sheng Wang of the University of Houston in Texas found subtle signs of superconductivity. It wasn't zero resistance, but it's the closest anyone's got so far. "I think all the experimental results are consistent with superconductivity," Zhao says. "But I cannot rule out other explanations." At the moment no superconductor will work above about 130 kelvin (-143 ¡C). But if a material could carry current with no resistance at room temperature, no energy would be lost as heat, meaning faster, lower-power electronics. And electricity could be carried long distances with 100 per cent efficiency. Zhao and Wang studied the effects of magnetic fields on hollow fibres of carbon known as "multiwall carbon nanotubes". Each nanotube is typically a millionth of a metre long, several billionths of a metre in diameter and with walls a few atoms thick. The nanotubes cling together in oblong bundles about a millimetre in length. The researchers did not see zero resistance in their bundles. They think this is because the connections between the tiny tubes never become superconducting. But they did see more subtle signs of superconductivity within the tubes themselves.

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

61-80 of 116 Back | 1 | 2 | 3 | 4 | 5 | 6 | Next 20