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Displaying 18526 - 18550 of 74220

High Sensitivity Optomechanical Reference Accelerometer Over 10 kHz

June 5, 2014
Author(s)
Felipe Guzman, Lee M. Kumanchik, Jon R. Pratt, Jacob M. Taylor
We present an optically detected mechanical accelerometer that achieves a sensitivity of 100 ng/√Hz over a bandwidth of 10 kHz and is traceable. We have incorporated a Fabry-Perot fiber-optic micro-cavity that is currently capable of measuring the test

ITL Forensic Science Program

June 5, 2014
Author(s)
Barbara Guttman, Martin Herman, Michaela Iorga, Larry Feldman, Kim Quill
Forensic science provides the methodologies for understanding crime scenes. It is used for analyzing evidence, identifying suspects, and prosecuting and convicting criminals while exonerating innocent people. To maintain the integrity of the U.S. criminal

Transport Properties of Fluids near Critical Points

June 5, 2014
Author(s)
Jan V. Sengers, Richard A. Perkins
This chapter reviews the currently available information concerning the behavior of transport properties near the vapor-liquid critical point of fluids and fluid mixtures. Special attention is devoted to the behavior of the thermal conductivity which

A study of shear banding in polymer solutions

June 4, 2014
Author(s)
Michael E. Cromer, Glenn Fredrickson, Gary Leal
In a recent letter (Cromer et al. Phys. Fluids 2013) we showed, for the first time, the existence of a steady shear-banded velocity profile for a polymer solution with an underlying monotonic constitutive curve. The driving mechanism is the coupling of the

Chemical Fume Hoods and Biological Safety Cabinets

June 4, 2014
Author(s)
Thomas J. Bruno
Engineered safety equipment is preferred over the reliance on personal protective equipment, and the fume hood is one such engineered safety device that is nearly ubiquitous in laboratories. Laboratories concerned with biological specimens (microbes

Common Symbols Used in Gas and Liquid Chromatographic Schematic Diagrams

June 4, 2014
Author(s)
Thomas J. Bruno
The literature of gas and liquid chromatography frequently contains schematic diagrams that depict analytical apparatus and peripherals. The interpretation of such diagrams can be facilitated by the following graphics that show the most common symbols used

Figures of Merit

June 4, 2014
Author(s)
Thomas J. Bruno
In the interpretation of results from a particular technique, one often must evaluate the performance of the measurement on the basis of objective measures that are called figures of merit. The following table provides a description of the more common

Neutron Interferometric Measurement of the Scattering Length Difference Between the Triplet and Singlet States of N-3 He.

June 4, 2014
Author(s)
Michael G. Huber, Muhammad D. Arif, Wei-Chen N. Chen, Thomas R. Gentile, Daniel S. Hussey, T C. Black, Dimitry A. Pushin, F. E. Wiefeldt, C.B Shahi, L Yang
We report a new determination of the n-Helium-3 scattering length difference Δ b = (−5.411 ± 0.031 (statistical) ± 0.039 (systematic) ) fm between the triplet and singlet states using a neutron interferometer. This revises our previous result Δ b = (−5.610

Organic Analytical Reagents for the Determination of Inorganic Ions

June 4, 2014
Author(s)
Thomas J. Bruno, Paris D. Svoronos
The table entitled Organic Analytical Reagents for the Determination of Inorganic Substances, by G. Ackermann, L. Sommer, and D. Thorburn Burns, has been revamped and considerably expanded for this edition. The many recent advancements in this area have

Varieties of Hyphenated Gas Chromatography with Mass Spectrometry

June 4, 2014
Author(s)
Thomas J. Bruno
Because of the very powerful and common application of mass spectrometry with gas chromatography, the various technologies warrant more detailed consideration.[1-4] The following table provides basic information on the capabilities and applicability of the

Algorithmic Framework for Quality Assessment of Phase Equilibrium Data

June 3, 2014
Author(s)
Vladimir Diky, Robert D. Chirico, Joe W. Magee, Chris D. Muzny, Andrei F. Kazakov, Kenneth G. Kroenlein, Michael D. Frenkel, Jeongwon J. Kang
Data quality assessment procedures for various types of phase equilibrium data are reviewed and analyzed. Experimental data for vapor-liquid equilibrium (VLE), liquid-liquid equilibrium (LLE), solid-liquid equilibrium (SLE), infinite dilution activity

CCQM-K83 Draft A Report: International Comparison CCQM-K83 Halocarbons in Dry Whole Air

June 3, 2014
Author(s)
George C. Rhoderick, Franklin R. Guenther, David L. Duewer, Jeongsoon Lee, Jin Seog Kim, Dongmin Moon, Jinbok Lee
The growing awareness of climate change/global warming and continuing concerns regarding stratospheric ozone depletion will require future measurements and standards for many compounds, in particular halocarbons that are linked to these issues. In order to

Quantifying Crystallinity in High Molar Mass Poly(3-hexylthiophene)

June 3, 2014
Author(s)
Chad R. Snyder, Ryan C. Nieuwendaal, Dean M. DeLongchamp, Christine K. Luscombe, Prakash Sista, Shane D. Boyd
We extend a recent comprehensive study of 3-hexylthiophene oligomers to high molar mass poly(3-hexylthiophene) (P3HT) fractions, such as those used in organic photovoltaic devices. Through a combination of differential scanning calorimetry (DSC) and 13C

Resource Allocation for Selection Decisions with Measurement Uncertainty

June 3, 2014
Author(s)
Dennis D. Leber, Jeffery W. Herrmann
Before selecting an alternative based on attribute values that have been determined through a measurement process that has error, a decision-maker can, in some cases, collect additional data to reduce uncertainty. Unlike previous work in the area of

BPMN Profile for Operational Requirements

June 2, 2014
Author(s)
Conrad E. Bock, Raphael Barbau, Anantha Narayanan Narayanan
An important aspect of systems and products is how they interact with their environment, including how they are operated. Behaviors external to systems usually involve people not trained in the details of how systems are designed and built, but who need to

Method for combined biometric and chemical analysis of human fingerprints

June 2, 2014
Author(s)
Jessica L. Staymates, Shahram Orandi, Matthew E. Staymates, John G. Gillen
This paper describes a method for combining direct chemical analysis of latent fingerprints with subsequent biometric analysis within a single sample. The method described here uses ion mobility spectrometry (IMS) as a chemical detection method for
Displaying 18526 - 18550 of 74220