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Displaying 36151 - 36175 of 74165

The Influence of Clay and Elastomer Concentration on the Morphology and Fracture Energy in Preformed Acrylic Rubber Dispersed Clay Filled Epoxy Nanocomposites

November 1, 2005
Author(s)
G Balakrishnan, P R. Start, D T. Raghavan, Steven Hudson, D Yebassa
The influence of toughener and clay concentration on the morphology and mechanical properties of three-phase, rubber-modified epoxy nanocomposites was studied. Nanocomposite samples were prepared by adding octadecyl ammonium ion exchanged clay to a

Theory of the Frequency Comb Output from a Femtosecond Fiber Laser

November 1, 2005
Author(s)
Nathan R. Newbury, Brian Washburn
The output of a femtosecond fiber laser will form a frequency comb that can be phase-locked through feedback to the cavity length and pump power. A perturbative theory is developed to describe this frequency comb output, in particular for a solitonic fiber

Thermochemistry of Inosine

November 1, 2005
Author(s)
J A. Boerio-Goates, Sarah D. Hopkins, Ricardo A. Monteiro, M D. Ribeiro da Silva, M A. Ribeiro da Silva, Robert N. Goldberg
The formation thermodynamic properties of crystalline and aqueous inosine have been determined by using a combination of calorimetric techniques. Oxygen bomb calorimetric measurements on crystalline inosine yielded a standard molar enthalpy of combustion

Correlation Charts for Ultraviolet-Visible Spectrophotometry

October 31, 2005
Author(s)
Thomas J. Bruno, Paris D. Svoronos
This section provides correlation charts and operational information for the design and interpretation of ultraviolet spectrophotometric (UV-Vis) measurements. While UV-Vis. is perhaps not as information-rich as infrared or nuclear magnetic resonance, it

Infrared Spectrophotometry

October 31, 2005
Author(s)
Thomas J. Bruno, Paris D. Svoronos
In this chapter, we present a series of correlation charts to aid in the interpretation of infrared spectra, and in performing infrared spectroscopic measurements. The correlation charts represent the characteristic absorptions that are produced by

Microfabricated Atomic Magnetometers

October 31, 2005
Author(s)
P Schwindt, John E. Kitching, Leo W. Hollberg, Svenja A. Knappe, V Shah, Li-Anne Liew, John Moreland
Using the techniques of microelectromechanical systems, we are developing chip-scale atomic sensors based on laser excitation of alkali atoms. Recently, we demonstrated a magnetometer physics package that had sensitivity of 50 pT / Hz1/2 at 10 Hz, had a

Nuclear Magnetic Resonance Spectroscopy

October 31, 2005
Author(s)
Thomas J. Bruno, Paris D. Svoronos
This section provides correlation charts and operational information for the design and interpretation of nuclear magnetic resonance (NMR) measurements.

Planning Report 05-2: IPv6 Economic Impact Assessment

October 31, 2005
Author(s)
Gregory C. Tassey
This report presents estimates of the costs and benefits associated with transitioning from Internet Protocol Version 4 (IPv4) to Internet Protocol Version 6 (IPv6). Cost estimates are based on likely development and deployment scenarios provided by

Comparison of Gains Determined from the Extrapolation and Pattern Integration Methods

October 30, 2005
Author(s)
Michael H. Francis, Katherine MacReynolds, Jeffrey R. Guerrieri
Scientists at the National Institute of Standards (NIST) have measured the gain of several antennas using two different methods. The first method is the three-antenna extrapolation method developed at NIST in the early 1970s. The second method is the

Planar Near-Field Measurements Results up to 94 GHz Using Probe Position Correction

October 30, 2005
Author(s)
Jeffrey R. Guerrieri, Katherine MacReynolds, Michael H. Francis, Ronald C. Wittmann, Douglas T. Tamura
This paper presents results of planar near-field measurements at 16, 35 and 94 GHz using probe position correction algorithms. The algorithms correct for position errors of the probe near the scan plane. The probe?s actual position is measured using a

Ab Initio Relativistic Calculation of the RbCs Molecule

October 28, 2005
Author(s)
Svetlana A. Kotochigova, Eite Tiesinga
We apply the relativistic configuration interaction valence bond method to calculate various characteristics of the alkali-metal RbCs dimer. These include the electronic potentials and transition dipole moments between the ground and first excited states

Multichannel Quantum-Defect Theory for Slow Atomic Collisions

October 28, 2005
Author(s)
B Gao, Eite Tiesinga, Carl J. Williams, Paul S. Julienne
We present a multichannel quantum-defect theory for slow atomic collisions that takes advantages of the analytic solutions for the long-range potential, and both the energy and the angular-momentum insensitivities of the short-range parameters. The theory

Cross-Property Correlations and Permeability Estimation in Sandstone

October 26, 2005
Author(s)
C H. Arns, M A. Knackstedt, Nicos Martys
Results from a numerical study examining the cross-property correlations linking fluid permeability to conductive properties and to a number of pore size parameters based on 3D digitized images of sedimentary rock are presented. In particular we focus on
Displaying 36151 - 36175 of 74165
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