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Topic Area: Physics

Displaying records 91 to 100 of 705 records.
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91. Quasianalytical modal approach for computing Casimir interactions in periodic nanostructures
Topic: Physics
Published: 10/3/2012
Authors: Francesco Intravaia, Paul S Davids, Ricardo Decca, Vladimir A Aksyuk, Daniel Lopez, Diego A. R. Dalvit
Abstract: We present an almost fully analytical technique for computing Casimir interactions between 1D periodic lamellar gratings based on a modal approach. Our method improves on previous work on Casimir modal approaches for nanostructures by using the exa ...

92. Interstellar Carbodiimide (HNCNH) - A New Astronomical Detection from the GBT PRIMOS Survey via Maser Emission Features
Topic: Physics
Published: 10/1/2012
Authors: Brett A. McGuire, Ryan A. Loomis, Cameron M. Charness, Geoffery A. Blake, Jan M. Hollis, Francis John Lovas, Philip R. Jewell, Anthony J. Remijan
Abstract: Historically, searches for new astronomical molecules resulted in the detection of favorable, high line strength transitions based on a thermal approximation to the excitation of these species in interstellar environments. Given the temperatures of ...

93. Microsecond Accuracy at Multiple Locations: Is it possible without GPS?
Topic: Physics
Published: 10/1/2012
Author: Michael A Lombardi
Abstract: The microsecond is the most discussed unit in industrial timing systems, because microsecond accuracy is required to support critical infrastructure. Most critical infrastructure timing systems depend upon GPS, simply because microsecond accuracy is ...

94. Enhanced WWVB Broadcast
Topic: Physics
Published: 9/26/2012
Author: John P Lowe
Abstract: Enhanced WWVB Broadcast for web site.

95. The Habitable-Zone Planet Finder: A Stabilized Fiber-Fed NIR Spectrograph for the Hobby-Eberly Telescope
Topic: Physics
Published: 9/24/2012
Authors: Scott A Diddams, Suvrath Mahadevan, Lawrence W. Ramsey , Chad F. Bender, Ryan Terrien, Jason T. Wright, Samuel Halverson, Fred Hearty, M Nelson, Adam Burton, Stephen Lewis Redman, Steve Osterman, James Kasting, Michael Endl
Abstract: We present the scientific motivation and conceptual design for the recently funded Habitable-zone Planet Finder (HPF), a stabilized fiber-fed near-infrared (NIR) spectrograph for the 10 meter class Hobby-Eberly Telescope(HET) that will be capable of ...

96. Performance of the NIST goniometer with a broad-band source and multichannel CCD based spectrometer
Topic: Physics
Published: 9/20/2012
Authors: Vyacheslav Borisovich Podobedov, Maria E Nadal, Carl C Miller

97. The Need for a Robust Precise Time and Frequency Alternative to Global Navigation Satellite Systems
Topic: Physics
Published: 9/17/2012
Authors: Michael A Lombardi, Mitch Narins, Per Engen, Ben Peterson, Sherman Lo, Dennis Akos
Abstract: Positioning, Navigation, and Timing (PNT) services are key enablers of both essential safety and security applications and economically beneficial capacity and efficiency applications worldwide. Whether users are ground-based, sea-based or in the air ...

98. 100-Fold Reduction of Electric-Field Noise in an Ion Trap Cleanded with In Situ Argon-Ion-Beam Bombardment
Topic: Physics
Published: 9/7/2012
Authors: Dustin Alexander Hite, Yves Colombe, Andrew Colin Wilson, Kenton R. Brown, Ulrich J. Warring, Robert Jordens, John D. Jost, David P Pappas, Dietrich G Leibfried, David J Wineland, Kyle Stephen McKay
Abstract: Anomalous heating of trapped atomic ions is a major obstacle to their use as quantum bits in scalable quantum computers. The physical origin of this electric field noise is not fully understood, but experimental evidence suggests that it emanates fr ...

99. Ultrafast manetization enhancement in metallic multilayers driven by superdiffusive spin current
Topic: Physics
Published: 9/4/2012
Authors: Thomas J Silva, Justin M Shaw, Hans Toya Nembach, Dennis Rudolf, Chan La-O-Vorakiat, Marco Battiato, Roman Adam, Emrah Turgut, Stefan Mathias, Margaret M. Murnane, Henry C. Kapteyn, Claus M. Schneider
Abstract: Uncovering the physical mechanisms that govern ultrafast charge and spin dynamics is crucial for understanding correlated matter as well as the fundamental limits of ultrafast spin-based electronics. Spin dynamics in magnetic materials can be driven ...

100. A Sub-Sampling Digital PM/AM Noise Measurement System
Topic: Physics
Published: 9/1/2012
Authors: Craig W Nelson, David Allan Howe
Abstract: A digital phase/amplitude modulation (PM/AM) noise measurement systems (DNMS) implementing field progammable gate array (FPGA) based digital down converters (DDCs), and 250 MHz analog to digital converters (ADCs) is reported. Measurements in the firs ...

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