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Conferences

A Frequency Stabilized Laser Array for Use in Displacement Metrology

February 1, 2000

Author(s)

J Pedulla, R Deslattes, John R. Lawall

We have developed a frequency stabilized laser system to supply light to measure atomic-scale displacements of a stage moved in real time. Each laser in the...

Δ-Kick and Raman Cooling on a Cesium Atomic Fountain

February 1, 2000

Author(s)

L Lising

Atomic clocks similar to the most precise clocks in existence are presently being developed for installation on the International Space Station. The...

Atomic Force Microscopy of Hybrid Bilayer Membranes

February 1, 2000

Author(s)

John T. Woodward IV

Hybrid bilayer membranes (HBM) are synthetic membrane mimics designed to form a biomimetic surface. The basic HBM system consists of a lipid monolayer adsorbed...

Novel Detection Method for DNA Hybridization Based on Molecular Spotlighting

February 1, 2000

Author(s)

T H. Huang, Michael J. Tarlov

A new platform for monitoring hybridization of thiol-derivatized DNA probes (SH-DNA) immobilized on gold surfaces is currently being developed. The gold surface...

Grazing Incidence X-Ray Photoemission Spectroscopy of Silicon Oxy-Nitride Ultrathin Films

February 1, 2000

Author(s)

E Landree, Terrence J. Jach

Grazing incidence X-ray photoemission spectroscopy (GIXPS) can be used to obtain both chemical and structural information to describe the depth profile for a...

Surface Plasmon Resonance Measurements of DNA Probe/Target Hybridization Reactions on Gold Surfaces

February 1, 2000

Author(s)

G B. Saupe, Michael J. Tarlov

Optimizing and understanding the parameters involved in thin film DNA hybridizations are important to emerging DNA sensor array technologies. We recently...

FT-IR Microspectroscopy and Multivariate Statistics on Plant Cells

February 1, 2000

Author(s)

B M. Allen

Agricultural biotechnology requires methods for the early diagnosis of the effects of environmental stressors such as excessive exposure to ozone, metal and...

Predictions of Environmental Properties of Halogenated Organics by a Computational Chemistry Screening Tool

February 1, 2000

Author(s)

F Louis

The abstraction of hydrogen atoms by hydroxyl radicals is the determining factor in the tropospheric lifetimes of most saturated organic compounds, including...

Development of a Heteroplasmic Mitochondrial DNA Standard Reference Material for Detection of Heteroplasmy and Low Frequency Mutations

February 1, 2000

Author(s)

L A. Tully, Frederick P. Schwarz, Barbara C. Levin

The National Institute of Standards and Technology (NIST) is developing a heteroplasmic human mitochondrial DNA (mtDNA) standard reference material (SRM) to...

Using Chemical Kinetic Effects for Understanding and Developing Chemical Sensors

February 1, 2000

Author(s)

M C. Wheeler, Richard E. Cavicchi, G Poirier, Stephen Semancik

While conductometric gas sensing has been widely studied, the mechanisms are not well understood (particularly for modified oxides). For example, what magnitude...

An Electrochemical Biosensor Sensitive to Structure Changes in an Absorbed Phospholipid Layer: Development of a Phospholipase C Biosensor

February 1, 2000

Author(s)

John T. Elliott

We have fabricated an electrochemical biosensor for detecting structure changes in a phospholipid layer absorbed onto a mixed thioalkyl self-assembled monolayer...

Recognition of Nonnative Polypeptides by the GroEL Chaperonin: How Important Is Hydrophobic Surface Area for Binding?

February 1, 2000

Author(s)

W K. Hartmann, E Eisenstein

The broad range of substrate polypeptides that interact with the GroEL chaperonin has prompted the proposal that hydrophobic interactions provide the primary...

Melting Analysis of DNA Dumbbells with Repeating Dinucleotide Stem Sequences Reveals Evidence for Long Range Sequence Dependent Interactions in Short Duplex DNA

February 1, 2000

Author(s)

Peter M. Vallone, R. Owczarzy, P. V. Riccelli, A. S. Benight

Melting Analysis of DNA Dumbbells with Repeating Dinucleotide Stem Sequences Reveals Evidence for Long Range Sequence Dependent Interactions in Short Duplex DNA...

The Role of Hydrogen Bonding in Transition-State Stabilization by Uracil-DNA Glycosylase

February 1, 2000

Author(s)

A C. Drohat

An important question regarding the mechanism of N-glycosidic bond cleavage by pyrimidine-specific DNA glycosylases is how the enzyme activates the pyrimidine...

Capillary X-Ray Microfluorescence Instrument

February 1, 2000

Author(s)

J R. Swider

Although many techniques for microanalysis exist, few are totally nondestructive, easy to maintain, or portable. Techniques such as Electron Probe Microanalysis...

Improving PDM Testability Through Standards Harmonization

February 1, 2000

Author(s)

Katherine C. Morris

Product Data Management (PDM) is quickly becoming a mainstay technology supporting product development. Several standards are emerging to support...

All-Dielectric Micromachined Calorimeter for High-Resolution Microwave Power Measurement

February 1, 2000

Author(s)

John M. Moreland, Pavel Kabos, Albrecht Jander

We have developed a micromachined bimaterial cantilever with a thin-film ferromagnetic resonance (FMR) sensor to probe rf fields near microwave devices. A...

Imaging of Impact Damage in Composites Using Optical Coherence Tomography

February 1, 2000

Author(s)

Joy Dunkers, D P. Sanders, Donald L. Hunston, M J. Everett

Resistance to impact damage is extremely important for most composites. Such damage can initiate delamination, one of the most common failure modes in...

Structure and Microwave Dielectric Properties in the x Ca₂AlNbO₆: (1-x) Ca₃Nb₂O₈ System

February 1, 2000

Author(s)

Julia Y. Chan, Terrell A. Vanderah, Robert S. Roth, Winnie Wong-Ng, B A. Reisner, Richard G. Geyer

The structure and dielectric properties of bulk ceramics in the xCa2AlNbO6: (1-x)Ca3Nb2O8 system were studied. Ca2AlNbO6 (P21/n, a = 5.3785(1) , b = 5.4158(1)...

Diagnostics for Light Measuring Devices in Flying-spot Display Measurements

January 31, 2000

Author(s)

Paul A. Boynton, Edward F. Kelley, S. Highnote, R. Hurtado

Flying-spot displays, such as some laser projection displays, use a high-energy beam as a light source that scans the image across the display screen. Each...

Design of 3-D Visualization of Search Results: Evolution and Evaluation

January 25, 2000

Author(s)

John V. Cugini, Sharon J. Laskowski, M M. Sebrechts

We discuss the evolution of the NIST Information Retrieval Visualization Engine (NIRVE). This prototype employs modern interactive visualization techniques to...

Assurance Protocols and Small Web Retailers

January 24, 2000

Author(s)

Gordon E. Lyon

Many Web areas are in an early technological period of rapid evolution and intense competitive selection. Nowhere is this truer than with electronic commerce...

International Space Station Utilization for Radiometric Calibration Support to Earth Remote Sensing Program

January 19, 2000

Author(s)

E A. Thompson, Raju V. Datla, Robert D. Saunders, Albert C. Parr

The idea of utilizing the International Space Station (ISS) to provide a platform for manned and maintained NIST/SI traceable standard sensors in the visible...

Automatic Detection of Significant Variation From Designed Intent Utilizing Survey Data CIAMS: Construction Information and Management System.

January 1, 2000

Author(s)

D T. Latimer, O Hammond, R Hallon, C T. Stidsen, S L. Lam

Current practice of providing an "As-built" survey as the completion of work should not be the only mechanism for observation of problems in the construction...

Plastic Microfluid Systems for Clinical Measurements

January 1, 2000

Author(s)

Laurie E. Locascio, Michael Gaitan, J Hong, M Eldefrawi

Surface stress of tin oxide electrode

January 1, 2000

Author(s)

Gintaras Valincius, Vytautas Reipa

Development of the Pulse Tube Refrigerator as an Efficient and Reliable Cryocooler

January 1, 2000

Author(s)

Ray Radebaugh

Flits: Pervasive Computing for Processor and Memory Constrained Systems

January 1, 2000

Author(s)

William J. Majurski, Alden A. Dima, Mary T. Laamanen

Many pervasive computing software technologies are targeted for 32-bit desktop platforms. However, there are innumerable 8, 16, and 32-bit microcontroller and...

Accuracy Results from NIST-F1 Laser-Cooled Cesium Primary Frequency Standard

January 1, 2000

Author(s)

Steven R. Jefferts, D M. Meekhof, Jon H. Shirley, M Stepanovic, Thomas E. Parker

Update on Time and Frequency Activities at NIST

January 1, 2000

Author(s)

Thomas E. Parker, Donald Sullivan

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