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Displaying 34101 - 34125 of 74175

Microcantilever Torque Magnetometry Study of Patterned Magnetic Films

October 1, 2006
Author(s)
L. Yuan, Lan Gao, R. Sabirianov, Sy-hwang Liou, Michelle Chabot, Dong-Hoon Min, John M. Moreland, Bao Shan Han
Microcantilever torque magnetometry (MTM) is a sensitive tool to measure small magnetization changes in the sample. In this paper, we investigated a process for preparing patterned magnetic films on cantilevers and studied the magnetic interactions of a

Mutation-Biased Adaptation in a Protein NK Model

October 1, 2006
Author(s)
Arlin B. Stoltzfus
Evolutionary trends responsible for systematic differences in genome and proteome composition have been attributed to GC:AT mutation bias in the context of neutral evolution or to selection acting on genome composition. A possibility that has been ignored

Nanoparticle Lithography and Imaging Scanning Probe Microscopy

October 1, 2006
Author(s)
Jaroslaw Grobelny, De-Hao D. Tsai, Doo-In Kim, Pradeep N. Namboodiri, Robert F. Cook, Michael R. Zachariah
Scanning tunnelling microscopy (STM) imaging was performed on goldsurfaces with a large coverage of monodispersed silver nanoparticlessoft-landed on the surface from the gas phase. In both ambient and ultra-highvacuum conditions, STM scanning was found to

Notes on an Information Model for Production Rules

October 1, 2006
Author(s)
Peter O. Denno
Production rules are rules used in production systems, sometimes called production rule engines. Production rule engines are commonly used to implement expert systems. This report describes an information model for the exchange of production rules and for

Phase Velocity in Resonant Structures

October 1, 2006
Author(s)
James R. Baker-Jarvis, Michael D. Janezic, Derik Love, Thomas Mitchell (Mitch) Wallis, Christopher L. Holloway, Pavel Kabos
In this paper we present a simple experimental procedure for studying the phase velocity behavior of a metafilm with tunable material properties. Using this approach we have studied the phase-velocity behavior of a metamaterial under different conditions

Predictability of the Technical Variation in Gene Expression Measurements

October 1, 2006
Author(s)
Walter S. Liggett Jr
Technical variation in whole-genome, single-probe, one-color microarrays has some common properties that are the subject of this paper. One such property, which is evidenced in measurement of different materials in the same laboratory, involves non

Preoxidation as a general approach to suppressing orange-peel coupling in magnetic tunnel junctions

October 1, 2006
Author(s)
William F. Egelhoff Jr., Robert McMichael, Cindi L. Dennis, Mark D. Stiles, Alexander J. Shapiro, Brian B. Maranville, Cedric J. Powell
We have found that preoxidation of the bottom electrode prior to deposition of Al 2O 3 or MgO is very effective as a general approach to suppressing orange-peel coupling in magnetic tunnel junctions. When orange-peel coupling is suppressed, the hard-axis

Programmable Active Services for SIP

October 1, 2006
Author(s)
Jean Deruelle, Mudumbai Ranganathan, Douglas C. Montgomery
We have implemented a quantum key distribution (QKD) system with polarization encoding at 850 nm over 1 km of optical fiber. The high-speed management of the bit-stream, generation of random numbers and processing of the sifting algorithm are all handled

Propagation and Detection of Radio Signals Before, During, and After the Implosion of a Large Convention Center

October 1, 2006
Author(s)
Christopher L. Holloway, Galen H. Koepke, Dennis G. Camell, Catherine A. Remley, Susan A. Schima, M. McKinley, Robert T. Johnk
In this report, we investigate radio communications problems faced by emergency responders (firefighters and police) in disaster situations such as collapsed buildings. A fundamental challenge to communications into and out of large buildings is the strong

Recent Advances in High-Voltage, High-Frequency Silicon-Carbide Power Device

October 1, 2006
Author(s)
Allen R. Hefner Jr., Ryu Sei-Hyung, Hull Brett, David W. Berning, Colleen E. Hood, Jose M. Ortiz-Rodriguez, Angel Rivera-Lopez, Tam H. Duong, Adwoa Akuffo, Madelaine H. Hernandez
The emergence of High-Voltage, High-Frequency (HV-HF) Silicon-Carbide (SiC) power devices is expected to revolutionize commercial and military power distribution and conversion systems. The DARPA Wide Bandgap Semiconductor Technology (WBST) High Power

RFID-Assisted Indoor Localization and Communication for First Responders

October 1, 2006
Author(s)
Jeffrey R. Guerrieri, Michael H. Francis, Perry F. Wilson, Leonard E. Miller, Nelson Bryner, David Stroup, Luke Klien-Berndt
An indoor localization and communication project is described that proposes to use RFID (radio-frequency identification) tags, placed in the building beforehand, as navigation waypoints for an inertial navigation system carried by a first responder. RFID

Simulation Prototypes for Incident Management Training

October 1, 2006
Author(s)
Guodong Shao, Charles R. McLean
First responders and incident management personnel need better training resources to prepare for future disasters. Live training exercises while valuable are often very expensive to organize and conduct. Training using modeling, simulation, and gaming

Spectrally Tunable Sources for Advanced Radiometric Applications

October 1, 2006
Author(s)
Steven W. Brown, Joseph P. Rice, J D. Jackson, Jorge E. Neira, Bettye C. Johnson
A common radiometric platform for the development of application-specific metrics to quantify the performance of sensors and systems is described. Using this platform, systems may be quantified in terms of the accuracy of measurements of standardized sets

Study of BGP Peering Session Attacks and Their Impacts on Routing Performance

October 1, 2006
Author(s)
Kotikalapudi Sriram, Douglas C. Montgomery, Oliver Borchert, Okhee Kim, David R. Kuhn
We present a detailed study of the potential impact of BGP peering session attacks and the resulting exploitation of Route Flap Damping (RFD) that cause network-wide routing disruptions. We consider canonical grid as well as down-sampled realistic

The Interface Development for Machine Shop Simulation

October 1, 2006
Author(s)
Yan Luo, Yung-Tsun T. Lee
Modeling and simulation technology is recognized for facilitating training, reducing production cost, improving product quality, and shortening development time. However, this technology remains largely underutilized by industry today. This is because

Three-Antenna Extrapolation Gain Measurement System at Millimeter Wave Frequencies

October 1, 2006
Author(s)
Katherine MacReynolds, Jeffrey R. Guerrieri, Michael H. Francis, Douglas T. Tamura
This paper describes the new tabletop millimeter wave extrapolation range which will provide on-axis gain services up to 110GHz. A discussion of the extrapolation measurement method [1], as presented at the Antenna Measurements Techniques Association (AMTA

Time-correlated single-photon counting with superconducting single-photon detectors

October 1, 2006
Author(s)
Martin Stevens, Robert Hadfield, Robert E. Schwall, Sae Woo Nam, Richard Mirin
We report use of a niobium nitride superconducting single-photon detector in a time-correlated single-photon counting experiment. The detector has a timing jitter of 68 +/- 3 ps full-width at half-maximum with a Gaussian temporal profile. The detector's

Unsupervised Anomaly Detection System Using Next-Generation Router Architecture

October 1, 2006
Author(s)
Richard A. Rouil, Nicolas Chevrollier, Nada T. Golmie
Unlike many intrusion detection systems that rely mostly on labeled training data, we propose a novel technique for anomaly detection based on unsupervised learning and we apply it to counter denial-of-service attacks. Initial simulation results suggest

Advancing Towards Factory-Wide Data Quality for APC Applications

September 30, 2006
Author(s)
Harvey Wohlwend, Gino Crispieri, Ya-Shian Li-Baboud
Advancing to the next levels of Advanced Process Control (APC) requires the ability to intelligently merge existing and new data sources in order to refine semiconductor manufacturing. To fully exploit the acquired data points for analyses in APC
Displaying 34101 - 34125 of 74175
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