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Displaying 41301 - 41325 of 73970

Tuning the Response of Magnetic Suspensions

May 1, 2003
Author(s)
M. Chen, L Sun, John E. Bonevich, Daniel H. Reich, C L. Chien, P C. Searson
The magnetic properties of multilayer ferromagnetic/nonmagnetic (FM/NM) nanowires can be tailored by controlling the composition and length of the FM and NM segments. Manipulation of properties such as the magnetic easy axis, Curie temperature (TC)

Ultrafast Dynamics of Gold-Based Nanocomposite Materials

May 1, 2003
Author(s)
Joseph S. Melinger, V D. Kleiman, D McMorrow, Franziska Grohn, Barry J. Bauer, Eric J. Amis
The ultrafast electron dynamics are investigated for small ((2.5 4.0) nm average diameter) Au nanoparticles contained in two different types of organic-inorganic nanocomposites. In one case, an aqueous solution contains Au nanoparticles embedded inside

Updated NIST Photomask Linewidth Standard

May 1, 2003
Author(s)
J Pedulla, James E. Potzick, Michael T. Stocker
NIST is preparing to issue the next generation in its line of binary photomask linewidth standards. Called SRM 2059, it was developed for calibrating microscopes used to measure linewidths on photomasks, and consists of antireflecting chrome line and space

Visualization of Structural Steel Product Models

May 1, 2003
Author(s)
Robert R. Lipman, K A. Reed
A visual interface has been developed to provide a means for users to visualize the steel structure represented by a CIMsteel Integration Standards Release 2 (CIS2) file. Using a web-accessible translator, objects in a user's CIS2 file are mapped to

Vulnerabilities in Quantum Key Distribution Protocols

May 1, 2003
Author(s)
David R. Kuhn
Recently proposed quantum key distribution protocols are shown to be vulnerable to a classic man-in-the-middle attack using entangled pairs created by Eve. The attack could be applied to any protocol that relies on manipulation and return of entangled

Counting Errors in a Voltage-Biased Electron Pump

April 30, 2003
Author(s)
Xavier Jehl, Mark W. Keller, Richard L. Kautz, Joe Aumentado, John M. Martinis
We have measured the counting errors of a 7-junction electron pump when charge is pumped against a voltage difference. At voltages above about 50 υV, we find that the errors increase exponentially with both pump voltage and temperature, in agreement with

Quantitative Analysis and Characterization of DNA Immobilized on Gold

April 30, 2003
Author(s)
D Y. Petrovykh, H Y. Kimura-Suda, L J. Whitman, Michael J. Tarlov
We describe the complementary use of x-ray photoelectron spectroscopy (XPS) and fourier transform infrared (FTIR) spectroscopy to quantitatively characterize the immobilization of thiolated poly(dT)25 single-stranded DNA (ssDNA) on gold. When electron

PSPICE Analysis of the Scanning Capacitance Microscope Sensor

April 27, 2003
Author(s)
Gyoung H. Buh, Chi Tran, Joseph Kopanski
A detailed analysis of the capacitance sensor from a scanning capacitance microscope (SCM) is presented. PSPICE circuit simulations are compared with experimental results. The general behavior of the SCM sensor and practical aspects of the sensor-tuning

A Repository of Sensor Data for Autonomous Driving Research

April 25, 2003
Author(s)
Michael O. Shneier, Tommy Chang, Tsai Hong Hong, Geraldine S. Cheok, Harry A. Scott, Steven Legowik, Alan M. Lytle
We describe a project to collect and disseminate sensor data for autonomous mobility research. Our goals are to provide data of known accuracy and precision to researchers and developers to enable algorithms to be developed using realistically difficult

Ground Truth and Benchmarks for Performance Evaluation

April 25, 2003
Author(s)
A Takeuchi, Michael O. Shneier, Tsai H. Hong, Christopher J. Scrapper Jr, Geraldine Cheok
Progress in algorithm development and transfer of results to practical applications such as military robotics requires the setup of standard tasks, of standard qualitative and quantitative measurements for performance evaluation and validation. Although

Moving Object Prediction for Off-road Autonomous Navigation

April 25, 2003
Author(s)
Rajmohan Madhavan, Craig I. Schlenoff
The realization of on- and off-road autonomous navigation of Unmanned Ground Vehicles (UGVs) requires real-time motion planning in the presence of dynamic objects with unknown trajectories. To successfully plan paths and to navigate in an unstructured

Using A Priori Data for Prediction and Object Recognition in an Autonomous Mobile Vehicle

April 25, 2003
Author(s)
Christopher J. Scrapper Jr, T. Takeuchi, Tommy Chang, Tsai Hong Hong, Michael O. Shneier
A robotic vehicle needs to understand the terrain and features around it if it is to be able to navigate complex environments such as road systems. By taking advantage of the fact that such vehicles also need accurate knowledge of their own location and

Broadband Permittivity and Loss Tangent Measurements Using a Split-Cylinder Resonator

April 24, 2003
Author(s)
Michael D. Janezic, Edward Kuester, James R. Baker-Jarvis
We summarize a theoretical model for the split-cylinder resonator, based on the mode-matching method, for performing nondestructive permittivity and loss tangent measurements with the split-cylinder resonator. This new model properly takes into account the

Heat Release Rate Tests of Plastic Trash Containers

April 24, 2003
Author(s)
D W. Stroup, Daniel M. Madrzykowski
Two experiments were conducted to characterize the potential hazard from ignition of nominal 136 L (30 gal) trash containers made from high density polyethylene (HDPE) and loaded with cellulosic debris. Heat release rate was measured as a function of time

Evaluation of Extraction Methodologies for Corn Kernal (Zea Mays) DNA for Detection of Trace Amounts of Biotechnology-Derived DNA

April 23, 2003
Author(s)
Marcia J. Holden, J L. Blasic, L Bussjaeger, C Kao, Luke A. Shokere, D C. Kendall, L Freese, G. Ronald Jenkins
Sensitivity and accurate testing for trace amounts of biotechnology-derived DNA from plant material requires pure, high-quality genomic DNA as template for subsequent amplification using the polymerase chain reaction (PCR). Six methodologies were evaluated
Displaying 41301 - 41325 of 73970
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