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NIST Authors in Bold

Displaying 30951 - 30975 of 73697

High resolution X-ray transition-edge sensor cooled by tunnel junction refrigerators and operated above the transition temperature

April 21, 2008
Author(s)
Nathan A. Tomlin, Galen C. O\'Neil, James A. Beall, Gene C. Hilton, Kent D. Irwin, Daniel R. Schmidt, Leila R. Vale, Joel N. Ullom
We demonstrate cooling of an X-ray transition-edge sensor (TES) using solid-state refrigerators based on normal-metal / insulator / superconductor (NIS) tunnel junctions. We are able to operate the TES at a bath temperature of 260 mK, which is 75 mK above

Infrastructure System Design Methodology for Smart ID Cards Deployment

April 19, 2008
Author(s)
Ramaswamy Chandramouli
With the increasing use of smart cards for identity verification of individuals, it has become imperative for organizations to properly design and engineer the expensive infrastructure system that supports smart card deployment. Apart from sound system

Atoms in a Radio-Frequency-Dressed Optical Lattice

April 18, 2008
Author(s)
Ian B. Spielman, James V. Porto, William D. Phillips, Ben Brown, Patricia Lee, Nathan Lundblad
We load cold atoms into an optical lattice dramatically reshaped by radio-frequency coupling of statedependent lattice potentials. This radio-frequency dressing changes the unit cell of the lattice at a subwavelength scale, such that its curvature and

Interference Avoidance in Rapidly Deployed Wireless Ad hoc Incident Area Networks

April 18, 2008
Author(s)
Mohamed T. Refaei, Nader Moayeri, Michael R. Souryal
A common strategy for responding to indoor emergency scenarios is to rapidly deploy a group of first responders inside the incident area and an incident command center outside of the incident area. First responders are equipped with radios that allow them

Origin of Adhesion in Humid Air

April 18, 2008
Author(s)
Doo-In Kim, Jaroslaw Grobelny, Pradeep N. Namboodiri, Robert F. Cook
The origin of adhesion at nanoscale contacts in humid air is investigated by pull-off force measurements using atomic force microscopes in controlled environments from ultra-high vacuum through various humidity conditions to water. An equivalent work of

Crystal Structure, Stoichiometry, and Dielectric Relaxation in Bi 3.32 Nb 7.09 O 22.7 and Structurally Related Ternary Phases

April 17, 2008
Author(s)
I E. Grey, Terrell A. Vanderah, W G. Mumme, Robert S. Roth, Jorge T. Guzman, Juan C. Nino, Igor Levin
Ceramic materials which exhibit high relative dielectric permittivities and are processible at temperatures in the 1000 C to 1200 C range are of interest for embedded elements such as capacitor, resonators, and filters. Complex titanates, niobates, and

On Maximizing Provider Revenue in Market-based Compute Grids

April 17, 2008
Author(s)
Vladimir V. Marbukh, Kevin L. Mills
Market-based compute grids encompass service providers offering limited resources to potential users with varying demands and willingness to pay. Providers face difficult decisions about which jobs to admit and when to schedule admitted jobs. For this

PIE: An Online Prediction System for Protein-Protein Interactions from Text

April 17, 2008
Author(s)
Sun Kim, Soo-Yong Shin, In-Hee Lee, Soo-Jin Kim, Ram D. Sriram, Byoung-Tak Zhang
bio-text mining area, since the PPI information is critical for understanding biological processes. However, there are very few open systems available on the Web and most of the systems focus on keyword searching based on prede¯ned PPIs. PIE (Protein

Second Preimage Attacks on Dithered Hash Functions

April 17, 2008
Author(s)
Elena Andreeva, Charles Bouillaguet, Pierre-Alain Fouque, Jonathan J. Hoch, John M. Kelsey, Adi Shamir, Sebastien Zimmer
We develop a new generic long-message second preimage attack, based on combining the techniques in the second preimage attacks of Dean Dean99} and Kelsey and Schneier KS05} with the herding attack of Kelsey and Kohno KK06}. We show that these generic

Shear Thinning Near the Critical Point of Xenon

April 17, 2008
Author(s)
Robert F. Berg, Michael R. Moldover, M Yao, G A. Zimmerli
We measured shear thinning, a viscosity decrease ordinarily associated with complex liquids, near the critical point of xenon. The data span the range of reduced shear rates: 0.001 < γτ < 700, where γτ is the shear rate scaled by the relaxation time τ of

Physical characterization methods for iron-oxide contrast agents encapsulated within a targeted liposome-based delivery system

April 16, 2008
Author(s)
John A. Dagata, Natalia Farkas, Cindi L. Dennis, Robert D. Shull, Vincent A. Hackley, Charles W. Yang, Kathleen F. Pirollo, Esther H. Chang
Intact liposome-based targeted nanoparticle delivery systems (NDS) are immobilized by nonselective binding and characterized by scanning probe microscopy (SPM) in a fluid imaging environment. The size, size distribution, functionality, and stability of an

An Evaluation of Description Logic for the Development of Product Models

April 15, 2008
Author(s)
Xenia Fiorentini, Sudarsan Rachuri, Mahesh Mani, Steven J. Fenves, Ram D. Sriram
The languages and logical formalisms developed by information scientists and logicians concentrate on the theory of languages and logical theorem proving. These languages, when used by domain experts to represent their domain of discourse, most often have

Self-Sealing Nanoporous Low-k Dielectric Patterns Created by Nanoimprint Lithography

April 15, 2008
Author(s)
Hyun Wook Ro, H Peng, Ken-ich Nihara, Hae-Jeong Lee, Eric K. Lin, Alamgir Karim, D Gidley, Hiropshi Jinai, Do Y. Yoon, Christopher L. Soles
In this letter we describe how highly porous nanostructures can be directly printed into a poly(methylsilsequioxane) (PMSQ)-based organosilicate film, with high pattern fidelity, and develop the measurement infrastructure to quantitatively evaluate the

A Taxonomy of Homeland Security Modeling, Simulation, and Analysis Applications

April 14, 2008
Author(s)
Charles R. McLean, Sanjay Jain, Yung-Tsun T. Lee
The effective use of modeling, simulation, and analysis (MSA) applications could greatly enhance our ability to carry out the homeland security mission. These applications can be used to evaluate vulnerabilities in the nation s critical infrastructure as

Distribution of time-energy entanglement over 100 km fiber using superconducting single-photon detectors

April 14, 2008
Author(s)
Qiang Zhang, Hiroki Takesue, Sae Woo Nam, Carston Langrock, Xiuping Xie, Burm Baek, Martin M. Fejer, Yoshihisa Yamamoto
In this letter, we report an experimental realization of distributing entangled photon pairs over 100 km of dispersion-shifted fiber. In the experiment, we used a periodically poled lithium niobate waveguide to generate the time-energy entanglement and

Residual Multiparticle Entropy Does Not Generally Change Sign Near Freezing

April 13, 2008
Author(s)
William P. Krekelberg, Vincent K. Shen, Jeffrey R. Errington, Thomas M. Truskett
The residual multiparticle entropy (RMPE) of two- and three-dimensional fluids changes sign near the freezing line, providing a quasi-universal one-phase rule for the location of the liquid-solid transition. We present new simulation results ford

A Study of Users with Visual Disabilities and a Fingerprint Process

April 10, 2008
Author(s)
Mary F. Theofanos, Brian C. Stanton, Charles L. Sheppard
The Department of Homeland Security¿s (DHS) United States Visitor and Immigrant Status Indicator Technology (US-VISIT) program is a biometrically-enhanced identification system primarily situated at border points of entry such as airports and seaports
Displaying 30951 - 30975 of 73697
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