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Displaying 47626 - 47650 of 73969

Ferromagnetic Resonance Spectroscopy with a Micromechanical Calorimeter Sensor

August 1, 2000

Author(s)

John M. Moreland, M. Loehndorf, Pavel Kabos, Robert McMichael

We describe a new type of ferromagnetic resonance (FMR) spectroscopy that is based on a calorimeter sensor. We use an atomic force microscopy cantilever coated with a ferromagnetic thin film as a bimaterial sensor to measure absorption of microwaves at 9

Flame inhibition by ferrocene and blends of inert and catalytic agents

August 1, 2000

Author(s)

Gregory T. Linteris, M D. Rumminger, Valeri I. Babushok, Wing Tsang

Function-to-Form Mapping: Model, Representation and Applications in Design Synthesis

August 1, 2000

Author(s)

Sudarsan Rachuri

Design of a new artifact begins with incomplete knowledge about the final product and the design evolves as it progresses from the conceptual design stage to a more detailed design. In this paper, an effort has been made to give a structural framework

Guide for the Selection of Drug Detectors for Law Enforcement Applications

August 1, 2000

Author(s)

Alim A. Fatah

This document surveys the field of contraband drug detection, with emphasis on different types of drug detection methods available and current commercial sources for detection equipment. The introduction includes background information on the problem of

Guide to Test Methods, Performance Requirements, and Installation Practices for Electronic Sirens Used on Law Enforcement Vehicles

August 1, 2000

Author(s)

Randall P. Wagner

Sirens are devices that produce warning sounds. Siren sounds are intended to help alert the public that an emergency vehicle (e.g., police car, ambulance, fire truck) is nearby and responding to an emergency. These sounds should be recognized as the call

Guidelines to Federal Organizations on Security Assurance and Acquisition/Use of Tested/Evaluated Products

August 1, 2000

Author(s)

E Roback

Computer security assurance provides a basis for one to have confidence that security measures, both technical and operational, work as intended. Use of products with an appropriate degree of assurance contributes to security and assurance of the system as

High Frequency Response of Optical Magnetic Field Sensors Using Rare-Earth Iron Garnet Films

August 1, 2000

Author(s)

N. Itoh, Kent B. Rochford, H. Minemoto, S. Ishizuka

We have measured the high frequency response of optical magnetic field sensors using bismuth-substituted rare-earch iron garnet films up to 1 GHz.

High-Throughput Measurement of Polymer Blend Phase Behavior

August 1, 2000

Author(s)

J C. Meredith, Alamgir Karim, Eric J. Amis

Two-dimensional combinatorial thin film libraries are used to rapidly measure the LCST phase boundary of polystyrene and poly (vinylmethyl ether) blends in compositin-temperature space. The film libraries with continuous gradients in polymer blend

Immobilization of Nucleic Acids at Solid Surfaces: Effect of Oligonucleotide Length on Layer Assembly

August 1, 2000

Author(s)

A B. Steel, R Levicky, T M. Herne, Michael J. Tarlov

This report investigates the effect of DNA length and the presence of an anchoring group on the assembly of pre-synthesized oligonucleotides at a gold surface. The work seeks to advance fundamental insight into issues that impact the structure and behavior

Impact of Elevated Ambient Temperatures on Capacity and Energy Input to a Vapor Compression System -- Literature Review

August 1, 2000

Author(s)

S F. Yana Motta, Piotr A. Domanski

Operation of a system at elevated ambient temperatures inherently results in a lower coefficient of performance (COP). This conclusion comes directly from examining the Carnot cycle. The COP relation, COP=T evap/(T cond-T evap) indicates that the COP

Implications for Earthquake Risk Reduction in the United States From the Kocaeli, Turkey, Earthquake of August 17, 1999

August 1, 2000

Author(s)

John L. Gross, Long T. Phan

The moment magnitude (MW) 7.4 Kocaeli, Turkey, earthquake struck the Kocaeli province of northwestern Turkey on Tuesday, August 17, 1999 at 3:02 a.m. local time and caused extensive damage to buildings (an estimated 250,000 building units suffered from

Improving the Analytical Accuracy in the Analysis of Particles by Employing Low Voltage Analysis

August 1, 2000

Author(s)

John A. Small, J T. Armstrong

The energy of the electron beam, in conventional electron probe microanalysis, is generally in the range of 15-25 keV which provides the necessary overvoltage to excite efficiently the K and L x-ray lines for elements with atomic numbers in the range of

Inductively Coupled Plasmas in Low Global Warming Potential Gases

August 1, 2000

Author(s)

Amanda N. Goyettes, Yicheng Wang, James K. Olthoff

Many high density discharges used in microelectronics fabrication use fluorocarbon gases with coincidentally high global-warming potentials (GWPs). We have determined the identities, fluxes, and energy distributions of ions produced in high density

Information Models for Design Tolerancing: From Conceptual to the Detailed Design

August 1, 2000

Author(s)

Sudarsan Rachuri, Utpal Roy

Tolerance design is the process of deriving a description of geometric tolerance specifications for a product from a given set of desired properties of the product. Existing approaches to tolerance analysis and synthesis entail detailed knowledge of

Intercombination and Forbidden Transition Rates in C- and N-Like Ions (O 2+ , F 3+ and S 9+ ) Measured at a Heavy-Ion Storage Ring

August 1, 2000

Author(s)

E Trabert, A G. Calamai, John D. Gillaspy, G Gwinner, X Tordoir, A Wolf

Rates of an intercombination transition and of several electric-dipole forbidden transitions between the levels of the ground state in C-like ions of O and F and in N-like ions of S have been measured optically at a heavy-ion storage ring. The lifetime

ISO/IS 10303-227; Product Data Representation and Exchange Application Protocol: Plant Spatial Configuration

August 1, 2000

Author(s)

Mark E. Palmer, M Gilbert

This document specifies the application protocol for the exchange of the spatial configuration of plant systems with a central emphasis on piping systems. This part specifies the information required to construct a piping system, including the shape

Linear Procedures for Structures with Velocity-Dependent Dampers

August 1, 2000

Author(s)

Fahim Sadek, B Mohraz, Michael A. Riley

Passive energy dissipation devices are used to reduce the damaging effects of earthquakes. These devices can absorb a portion of the earthquake-induced energy in structures and thus reduce the energy demand on structural members. Wide acceptance of these

Lispix: A Public Domain Scientific Image Analysis Program for the PC and Macintosh

August 1, 2000

Author(s)

David S. Bright, K G Milan

Lispix is a public domain image processing system designed for use by microscopists. It runs on both Windows and Macintosh. Some of its features are described.

Magnetic Behavior of Atomically Engineered NiO-Co-Cu-based Giant Magnetoresistance Spin Valves Pb as a Surface Modifier

August 1, 2000

Author(s)

H D. Chopra, E J. Repetski, H J. Brown, P J. Chen, L Swartzendruber, William F. Egelhoff Jr.

The present study illustrates the efficacy of using surface modifiers, or simply surfactants, to alter, modify, or control the nature of interfaces and film morphology in order to control physical properties in magnetic multilayers. In particular, the

Mapping Chemically Heterogeneous Polymer System Using Chemical Modification and Atomic Force Microscopy

August 1, 2000

Author(s)

D T. Raghavan, Tinh Nguyen, Mark R. VanLandingham, Xiaohong Gu

Polymer coatings are heterogeneous and often contain nanoscale degradation -susceptible regions. Therefore, mapping and identification of these regions would provide essential information for understanding the mechanism of the degradation of polymeric

Microcalorimeter EDS for Low Voltage Microanalysis

August 1, 2000

Author(s)

David A. Wollman, Dale Newbury, Sae Woo Nam, Gene C. Hilton, Kent D. Irwin, David A. Rudman, Steven Deiker, Norman F. Bergren, John M. Martinis

Microcalorimeter EDS: Benefits and Drawbacks

August 1, 2000

Author(s)

David A. Wollman, Dale Newbury, Sae Woo Nam, Gene C. Hilton, Kent D. Irwin, David A. Rudman, Steven Deiker, Norman F. Bergren, John M. Martinis

The commercial introduction of high-count-rate, near-room-temperature silicon drift detectors (presently available) and high-energy-resolution cryogenic microcalorimeters (forthcoming) is an exciting development in x-ray microanalysis, in which detector

Microwave Dielectric Characterization of Unpatterned Thin Films Using a TE 0gN Dielectric Resonator Technique Theory

August 1, 2000

Author(s)

Richard G. Geyer, Clifford Krowne

An axially-layered cylindrical dielectric resonator comprised of substrate and thin film is placed into a parallel plate waveguide and operated in axi-symmetric TE 0γŅ resonant mode structure for microwave dielectric thin film characterization. With this

Model of Particle Growth in Silane Discharges

August 1, 2000

Author(s)

Alan Gallagher

The growth of silicon particles in the neutral plasma region of pure silane, rf capacitively coupled, steady-state discharges is calculated with a homogenous, plasma-chemistry model. Plasma conditions are typical of those used in hydrogenated amorphous

Molecular Orientation of Single and Two-Armed Monodendron Semifluorinated Chains on Soft and Hard Surfaces Studied Using NEXAFS

August 1, 2000

Author(s)

Jan Genzer, E Sivaniah, E K. Kramer, J G. Wang, M Xiang, K Char, Christopher K. Ober, Robert A. Bubeck, Daniel A. Fischer, M Graupe, R Colorado, O E. Shmakova, T R. Lee

Near-edge absorption fine structure (NEXAFS) measurements are used to probe the molecular orientation of semifluorinated (SF) mesogens, -(CH 2)x(CF 2)yF, which are attached to I) the isoprene backbone of polyisoprene or a styrene-isoprene diblock copolymer

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