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Displaying 34751 - 34775 of 73832

Universal Gradient Substrates for Click Biofunctionalization

February 22, 2006
Author(s)
Nathan D. Gallant, Kristopher Lavery, Eric J. Amis, Matthew Becker
In order to facilitate research on biomimetic and tissue engineered medical products we have developed a novel and versatile method for fabricating continuously variable concentration gradients of surface conjugated biomolecules. This technology utilizes

Comment on the paper Metrologia 42 49-57 (2005) by K. Szymaniec et al,

February 21, 2006
Author(s)
Steven R. Jefferts, F Levi
A recent evaluation of the accuracy of National Physical Laboratory (NPL) primary frequency standard NPL CsF1 gives an overall frequency uncertainty of δŅ/Ņ 0 = 1 × 10 -15. This stated uncertainty includes a correction of a frequency bias of δŅ/Ņ 0 = 8 ×

Spin Transfer Torque for Continuously Variable Magnetization

February 21, 2006
Author(s)
J Xiao, A Zangwill, Mark D. Stiles
We report quantum and semi-classical calculations of spin current and spin-transfer torque in a free-electron Stoner model for systems where the magnetization varies continuously in one dimension. Analytic results are obtained for an infinite spin spiral

An Empirical Analysis of IPv6 Transition Mechanism

February 20, 2006
Author(s)
M K. Shin, Darrin J. Santay, Douglas Montgomery
We examine the performance of multimodal biometric authentication systems using state-of-the-art Commercial Off-the-Shelf (COTS) fingerprint and face biometric systems on a population approaching 1,000 individuals. Majority of prior studies of multimodal

Nonlinearity of high-power optical fiber power meters at 1480 nm

February 20, 2006
Author(s)
Igor Vayshenker, Shao Yang, Ralph Swafford
We describe a calibration system that measures the nonlinearity of optical fiber power meters (OFPMs) at a maximum power of 0.6 W and a minimum power of 0.2 mW at 1480 nm. The system is based on the triplet superposition method. This system measures the

Simple Spectral Stray Light Correction Method for Array Spectroradiometers

February 20, 2006
Author(s)
Yuqin Zong, Steven W. Brown, Bettye C. Johnson, Keith R. Lykke, Yoshihiro Ohno
In many applications, the measurement accuracy of spectroradiometers, particularly instruments with a single dispersive element, is limited by the presence of stray radiation within the instrument. A simple, practical method has been developed to correct a

Dissolution Fundamentals of 193-nm Methacrylate Based Photoresists

February 19, 2006
Author(s)
Ashwin Rao, Shuhui Kang, B D. Vogt, Vivek Prabhu, Eric K. Lin, Wen-Li Wu, Karen Turnquest, W D. Hinsberg
The dissolution of partially deprotected chemically amplified photoresists is the final step in printing lithographic features. Since this process step can be tuned independently from the design of the photoresist chemistry, fundamental measurements of the

TREC: An Overview

February 17, 2006
Author(s)
Donna K. Harman, Ellen M. Voorhees
The Text REtrieval Conference (TREC) is a workshop series designed to build the infrastructure necessary for large-scale evaluation of text retrieval technology. Participants in the workshops (over 100 groups in the latest TREC) have been drawn from the

Phenomenology of Passive Broadband Terahertz Images

February 15, 2006
Author(s)
Charles Dietlein, A. Luukanen, Francois Meyer, Zoya Popovic, Erich N. Grossman
Images acquired by a 105-mK noise equivalent temperature difference (NETD) scanned single-pixel broadband 0.1-1 THz passive system are analyzed with two specific parameters of interest in mind. First, the minimum system noise level for clothing feature

Preliminary Face Recognition Grand Challenge Results

February 15, 2006
Author(s)
P J. Phillips, P J. Flynn, W T. Scruggs, K W. Bowyer, W Worek
The goal of the Face Recognition Grand Challenge (FRGC) is to improve the performance of face recognition algorithms by an order of magnitude over the best results in Face Recognition Vendor Test (FRVT) 2002. The FRGC is designed to achieve this

Terahertz circular variable filters

February 15, 2006
Author(s)
Erich N. Grossman, Charles Dietlein, A. Luukanen
We describe a novel class of millimeter-wave and terahertz monochrometers based on adiabatically tuned frequency-selective surfaces. They are analogous to the circular-variable filters commonly used in the infrared for low to moderate resolution

The Distillation and Volatility of Ionic Liquids

February 15, 2006
Author(s)
Martyn J. Earle, Jose M. Esperanca, Manuela A. Gilea, Luis P. Rebelo, Kenneth R. Seddon, Joe W. Magee, Jason A. Widegren
The distillation of a variety of ionic liquids is demonstrated for the first time. The distillations are performed at moderate to high temperatures and at reduced pressure.
Displaying 34751 - 34775 of 73832
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