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Displaying 29676 - 29700 of 74303

Efficient Error Concealment for the Whole-frame Loss Based on H.264/AVC

October 15, 2008
Author(s)
Hamid Gharavi, Bo Yan
For low bit-rate video communications, each video frame usually fills the payload of a single network packet. In this situation, the loss of a packet may result in loosing the entire video frame. Currently, most existing error concealment algorithms can

Gradient Nanofiber Scaffold Libraries for Tissue Regeneration by Electrospinning

October 15, 2008
Author(s)
Carl G. Simon Jr., Murugan Ramalingam, Marian F. Young, Vinoy Thomas
Functional tissue engineering is a rapidly emerging biomedical field that holds great potential for healthcare in addressing the gap between need and availability of donor tissues and organs. The dogma in the field of tissue engineering is to harvest a

Strong Low-Frequency Quantum Correlations From a Four-Wave Mixing Amplifier

October 15, 2008
Author(s)
C F. McCormick, Alberto M. Marino, V Boyer, Paul D. Lett
Quantum-correlated light displays sub-classical noise fluctuations between frequency sidebands on a single beam (quadrature squeezing) or between the intensities or phases of different beams (two-mode squeezing). Exploiting this noise reduction can improve

Towards Information Networks to Support Composable Manufacturing

October 15, 2008
Author(s)
Mahesh Mani, Albert W. Jones, Jun H. Shin, Ram D. Sriram
Rigid, supply-chain organizational structures are giving way to highly dynamic collaborative partnerships. These partnerships will develop rapidly by composing global manufacturing resources in response to open market opportunities; and, they will disband

Tradeoffs in Building a Generic Supply Chain Simulation Capability

October 15, 2008
Author(s)
Sanjay Jain
Building a simulation model for any large complex sys-tem requires high expertise and effort. These requirements can be reduced through building generic simulation capability that includes artifacts for facilitating the development of the simulation model

Impact of Sucrose Level on Storage Stability of Proteins in Freeze-Dried Solids: II. Correlation of Aggregation Rate with Protein Structure and Molecular Mobility

October 13, 2008
Author(s)
Bingquan S. Wang, Serguei Tchessalov, Marcus T. Cicerone, Nicholas W. Warne, Michael Pikal
The purpose of this study is to investigate the impact of sucrose level on storage stability of dried proteins and thus better understand the mechanism of protein stabilization by disaccharides in lyophilized products. Three IgG1 fusion proteins and two

Single Molecule Analysis of Electrodynamically Stretched DNA in Nanochannels

October 13, 2008
Author(s)
Samuel M. Stavis, Christian H. Reccius, John T. Mannion, Larry P. Walker, Harold G. Craighead
A rapid (~20 ms) and precise (~110 nm) analytical method is presented for stretching and interrogating single DNA molecules. Conformation, length, speed and fluorescence intensity measurements are obtained simultaneously. This confluence is a step forward

Contactless Differential Conductivity Detection

October 12, 2008
Author(s)
Gordon A. Shaw, David J. Ross, Steven E. Fick, Wyatt N. Vreeland
We propose a new technique, contactless differential conductivity detection (CDCD,) to improve the detection limit of contactless conductivity detection for capillary and microchannel electrophoresis. By exploiting a 3-electrode differential configuration

Oxide Reliability of SiC MOS Devices

October 12, 2008
Author(s)
Liangchun (. Yu, Kin P. Cheung, Jason P. Campbell, John S. Suehle, Kuang Sheng
Silicon carbide possesses excellent material properties for high temperature, high frequency and high power applications. Among all the device structures, MOSFET has advantages such as low gate leakage current, easier device control etc., and therefore

Bilateral comparison on polarization mode dispersion between KRISS and NIST

October 10, 2008
Author(s)
Seung-kwan Kim, Paul A. Williams
We made an international bilateral comparison on polarization mode dispersion between KRISS and NIST. Three mode-coupled artifacts were used for comparison. The average values of differential group delay measured by both institutes agreed well within their

Reanalysis of BASE Ventilation Data

October 10, 2008
Author(s)
Andrew K. Persily
In 2004, the National Institute of Standards and Technology (NIST) published an analysis of the ventilation data collected as part of the U.S. EPA Building Assessment Survey and Evaluation (BASE) study [1]. That analysis provided a unique dataset of office

Sounds of Atoms: Life in Science

October 10, 2008
Author(s)
Stephan J. Stranick
Early in setting up our nanoscience laboratory at Penn State, we were frustrated because we could not peer into the tunneling junctions of our scanning tunneling microscopes (STMs) to see what the atoms were doing. We were particularly vexed when singular

Calibration of a Radiance Standard for the NPP/OMPS Instrument

October 9, 2008
Author(s)
Bettye C. Johnson, James J. Butler, Scott J. Janz, Robert D. Saunders, John W. Cooper, Matthew G. Kowalewski, R Barnes
In June 2007, a spherical integrating source was calibrated in the National Aeronautics and Space Administration(NASA) Goddard Space Flight Center’s (GSFC) Calibration Facility as part of the prelaunch characterization program for the NPOESS Preparatory

Multichannel Decomposition and Isomerization of Octyl Radicals

October 9, 2008
Author(s)
Wing Tsang, William S. McGivern, Jeffrey A. Manion
The thermal cracking patterns from the decomposition and isomerization of octyl-1 radicals have been determined from the pyrolysis of n-octyl iodide in single pulse shock tube experiments at temperatures in the 850-1000 K range and pressures near 2 bar

Reference Ballistic Chronograph for Personal Armor Characterization

October 9, 2008
Author(s)
Nicholas Paulter, Donald R. Larson
Ballistic armor is evaluated using a V50 parameter, which describes the velocity above which half the shots are expected to penetrate a given type of body armor. The greater the error and uncertainty in measuring the velocity of the bullet, the greater the

Linking Accelerated Laboratory Test with Outdoor Performance Results for a Model Epoxy Coating System

October 8, 2008
Author(s)
Xiaohong Gu, Deborah S. Jacobs, Walter E. Byrd, Brian Dickens, Iliana Vaca-Trigo, William Meeker, Tinh Nguyen, Jonathan W. Martin
Laboratory and field exposure results have been successfully linked for a model epoxy coating system. The mathematical model used in making this linkage only assumed that the total effective dosage, additivity law, and reciprocity laws were valid. In this

THz Investigations of Condensed Phase Biomolecular Systems

October 8, 2008
Author(s)
Kevin O. Douglass, Hailiang Zhang, Susan K. Gregurick, Karen M. Siegrist, David F. Plusquellic
Terahertz (THz) spectroscopic investigations of crystalline dipeptide nanotubes are discussed in the frequency region from 0.6 THz (2 cm-1) to 3 THz (100 cm-1). The THz region provides access to collective modes of biomolecular systems and is therefore

Shape and Size Analysis and Standards

October 6, 2008
Author(s)
Afzal A. Godil, Sanford P. Ressler
The field of anthropometry is the science of measurement of the human body from which comparisons and characterizations of the size and shape of the body in different postures can take place. The size and shape of human bodies are important in many
Displaying 29676 - 29700 of 74303