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Displaying 37976 - 38000 of 74220

W-band dual channel PM/AM noise measurement system

August 23, 2004
Author(s)
Archita Hati, Craig Nelson, J Nava, David A. Howe, Fred L. Walls
We discuss the performance of a W-band (92 to 96 GHz) PM and AM noise measurement system. The system uses two nearly identical channels to measure the AM or P M noise added by an amplifier or any passive component. It is principally designed to measure

Transport Coefficients of the Lennard-Jones Model Fluid. I. Viscosity

August 22, 2004
Author(s)
J Meier, Arno D. Laesecke, Stephan Kabelac
In an extensive computer simulation study, the transport coefficients of the Lennard-Jones model were determind with high accuracy from equilibrium molecular-dynamics simulations. In the frame of time correlation function theory, the generalized Einstein

Reversible Proton Transfer Dynamics in Bacteriorhodopsin

August 20, 2004
Author(s)
Y. S. Lee, Morris Krauss
Proton transfer in bacteriorhodopsin from the cytoplasm to the extracellular side is initiated from protonated asp96 in the cytoplasmic region towards the deprotonated Schiff base. This occurs in the transition from the photocycle late M state to the N

Large Area Pt/n-GaN Schottky Photodiodes With Extremely Low Leakage Current

August 19, 2004
Author(s)
A Shahid, Robert E. Vest, D Franz, F Yan, Y Zhao, D B. Mott
Pt/n-type GaN Schottky photodiodes with very large active areas (0.25 cm 2 and 1 cmu2 ) which exhibit extremely low leakage currents at low reverse bias are reported. The Schottky photodiodes were fabricated from n-/n+ epitaxial layers grown by low

Nanotechnology in Integrative Systems: Introduction to Integrative Systems

August 17, 2004
Author(s)
Michael Gaitan
These days it's hard to imagine life without the benefits of integration, computers, and the internet. Even simple tasks such as shopping for food have gone 'high tech' with computerized checkout, laser scanners, digital scales, and electronic transactions

Significant papers from the first 50 years of the Boulder Labs

August 16, 2004
Author(s)
Mary E. DeWeese, Margaret Luebs, Heather McCullough
The Department of Commerce Boulder Labs were dedicated on September 14, 1954, in the shadow of World War II, and the of a bright future. This volume presents a snapshot of our research accomplishments in the half century since then. During this time, the

Lumped-Parameter Thermal Modeling of an IPEM using Thermal Component Models

August 15, 2004
Author(s)
J J. Rodriguez, Allen R. Hefner Jr., David W. Berning, M Velez-Reyes, Madelaine H. Hernandez, Jorge Gonz?lez
A thermal model for the CPES IPEM Gen. II is presented. The selected approach is the simulation of the thermal behavior of an experimental IPEM testbed using the 1D finite difference method. An equivalent electrical network representation of the thermal

Fatigue Sensitivity of Y-TZP to Microscale Sharp-Contact Flaws

August 14, 2004
Author(s)
Yu Zhang, Brian R. Lawn
The strength degrading effects of sharp-contact damage are examined for Y-TZP ceramic plates bonded to a plastic substrate. Microscale contacts are made with Vickers and Berkovich diamond indenters at low loads (0.01 N to 10 N) in the ceramic lower

Conducting atomic force microscopy for Nanoscale tunnel barrier characterization

August 13, 2004
Author(s)
Kristine Lang, Dustin Hite, Raymond Simmonds, Robert McDermott, David P. Pappas, John M. Martinis
Increasing demands on nanometer scale properties of oxide tunnel barriers necessitate a consistent means to assess them at these lengths. Here we use conducting atomic force microscopy (CAFM) to characterize aluminum oxide (AlOx)barriers to be used in

Decoherence in Josephson Qubits from Junction Resonances

August 13, 2004
Author(s)
Raymond Simmonds, Kristine Lang, Dustin Hite, David P. Pappas, John M. Martinis
We present experimental data that demonstrates a large reduction in the coherence of a Josephson phase qubit from spurious microwave resonances. These resonances are believed to arise from resonant fluctuators in the tunnel junction that couple to the

Helical Porous Protein Mimics

August 12, 2004
Author(s)
Virgil Percec, A E. Dulcey, Y Miura, U Edlund, V S. Balagurusamy, Steven Hudson, Paul A. Heiney, H Duan, S N. Magonov
Pore forming proteins, peptides and their remodeled structures perform a diversity of biological and biologically inspired functions. They include viral helical coats,1 transmembrane channels2,3, mediated protein folding4 and reversible encapsulation5

Contribution to the Zn-Rich Part of the Zn-Zr Phase Diagram

August 11, 2004
Author(s)
Maureen E. Williams, William J. Boettinger, Ursula R. Kattner
The reaction of zinc vapor with Zircaloy-4 and nuclear grade zirconium was investigated with various analytical techniques: optical metallography, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction. Based on

Micro-Electroplating Silver on Sharp Edges for Fabrication of Solid-State Nanopores

August 11, 2004
Author(s)
Brian J. Polk, Melanie Bernard, John J. Kasianowicz, Martin Misakian, Michael Gaitan
Electrodeposition of silver was investigated as a fabrication tool for infilling large (103 mm2) vias in silicon substrates. Silver reduction from ammoniacal silver nitrate was studied at electrodes of novel geometry, i.e. the edge of the vias, with

Single photon sources based on single quantum dots

August 8, 2004
Author(s)
Richard P. Mirin
We describe temperature-dependent photon antibunching measurements from single InGaAs/GaAs quantum dots. The second order intensity correlation demonstrates single emitter emission up to 120 K and nonclassical light emission to 135 K.
Displaying 37976 - 38000 of 74220