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Displaying records 321 to 330 of 460 records.
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321. A Superconducting Microwave Power Limiter for Protection of High-Performance Superconducting Electronics
Topic: Bioscience & Health
Published: 7/11/2003
Authors: James C Booth, Kenneth Leong, Susan Schima
Abstract: We report on the development of a microwave power limiter based on high temperature superconductor technology. The power limiter takes the form of a 50 Ω coplanar waveguide transmission line that can be reversibly driven into the normal state as ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=31362

322. Kinetic Inductance Contributions to the Nonlinear Response of Superconductors at Microwave Frequencies
Topic: Bioscience & Health
Published: 7/11/2003
Authors: James C Booth, Kenneth Leong, Susan Schima
Abstract: We demonstrate how nonlinear effects in high temperature superconducting thin films can be quantified based on a current-dependent penetration depth {lambda}(J). Using an assumed form for {lambda}(J), we calculate the expected third-order harmonic si ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=31363

323. A Self-Attenuating Superconducting Transmission Line for Use as a Microwave Power Limiter
Topic: Bioscience & Health
Published: 6/1/2003
Authors: James C Booth, David A Rudman, Ronald H. Ono
Abstract: We have designed, fabricated, and tested a microwave power limiter based on high temperature superconductor thin film technology. The signal limiter takes the form of a 50 {Ohm} coplanar waveguide transmission line that is reversibly driven from the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=30581

324. Description of the Nonlinear Behavior of Superconductors Using a Complex Conductivity
Topic: Bioscience & Health
Published: 6/1/2003
Authors: James C Booth, Susan Schima, Donald C. DeGroot
Abstract: The origin of the detrimental nonlinear response in the high Tc superconductor (HTS) microwave devices is currently not well understood. In order to help elucidate the origin of these nonlinear effects, we have performed phase-sensitive measurements ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=30580

325. Influence of Impedance Mismatch Effects on Measurements of Unloaded Q Factors of Transmission Mode Dielectric Resonators
Topic: Bioscience & Health
Published: 6/1/2003
Authors: Kenneth Leong, James C Booth, Sang Yo Lee
Abstract: Precise measurements of the surface resistance of high temperature superconducting thin films using transmission mode dielectric resonators requires accurate knowledge of the unloaded Q factor. So far, the most accurate method of unloaded Q factor de ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=30577

326. Microwave Surface Impedance and Nonlinear Properties of MgB^d2^ Films
Topic: Bioscience & Health
Published: 6/1/2003
Authors: James C Booth, Sang Yo Lee, Kenneth Leong, J. H. Lee, J. Lim, H. N. Lee, S. H. Moon, B. Oh
Abstract: We have measured the temperature dependence of the microwave surface impedance and the nonlinear response of high-quality MgB^d2^ films on c-cut sapphire at temperatures below 40 K. MgB^d2^ films with surface resistance (Rs) as low as 0.09 m{Ohm} at ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=30582

327. Tandem Isotachophoresis-Zone Electrophoresis via Base-Mediated Destacking for Increased Detection Sensitivity in Microfluidic Systems
Topic: Bioscience & Health
Published: 5/21/2003
Authors: Wyatt N Vreeland, S J Williams, A E Barron, A P Sassi
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903411

328. Choosing a Cantilever for In Situ Atomic Force Microscopy
Topic: Bioscience & Health
Published: 4/1/2003
Author: John Taylor Woodward IV
Abstract: This manuscript is a non-peer reviewed, invited tutorial for Microscopy Today. It describes the issues involved in choosing a cantilever for atomic force microscope (AFM) imaging under fluids. In situ AFM imaging is an increasingly popular techniqu ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830338

329. Thermodynamics of Enzyme-Catalyzed Reactions
Topic: Bioscience & Health
Published: 3/1/2003
Authors: Robert Nathan Goldberg, Yadu D. Tewari
Abstract: This review, which has been prepared for the McGraw-Hill 2003 Yearbook of Science and Technology, gives an overview of the thermodynamics of enzyme-catalyzed reactions. Topics include the thermodynamic formalism(s) used in this field, computational ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830319

330. The Influence of Agarose Concentration in Gels on the Electrophoretic Trapping of Circular DNA
Topic: Bioscience & Health
Published: 1/1/2003
Authors: Kenneth D Cole, B. Akerman
Abstract: The concentration of agarose in electrophoresis gels was found to have significant effects on the apparent density and release characteristics of the electrophoretic traps for circular DNA. Agarose gels were cast in a range of concentrations from 0. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830330



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