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Journals

MORPHOLOGY AND FRACTURE OF ENAMEL

September 16, 2009

Author(s)

Sang-Won Myoung, James J. Lee, Paul Constantino, Peter Lucas, Brian R. Lawn

Teeth are remarkable biological structures, brittle but resilient. Here we examine the inter-relation between enamel morphology and crack resistance by...

Rectification of the Ionic Current through Carbon Nanotubes by Electrostatic Assembly of Polyelectrolytes

September 16, 2009

Author(s)

Neal R. Scruggs, Joseph W. Robertson, John J. Kasianowicz, Kalman D. Migler

Rectification of the ionic current flowing through nanotubes embedded in a polymeric membrane is achieved by selective adsorption of polycations to the...

Synthesis and Characterization of Elastin Mimetic Hybrid Polymers with Alternating Molecular Architecture and Elastomeric Properties

September 15, 2009

Author(s)

Sheng Lin-Gibson, Sarah E. Grieshaber, Alexandra J. Farran, Kristi L. Kiick, Xinqiao Jia

We are interested in developing elastin mimetic hybrid polymers (EMHPs) that capture the multiblock molecular architecture of tropoelastin as well as the...

Effective three-body interactions of neutral atoms in optical lattices

September 15, 2009

Author(s)

Philip Johnson, Eite Tiesinga, James V. Porto, Carl J. Williams

We show that virtual excitations of neutral bosons to higher vibrational states in a three dimensional optical lattice generate effective, tunable, attractive...

INSTRUMENT FOR DETERMINING THE COMPLEX SHEAR MODULUS OF SOFT-TISSUE-LIKE MATERIALS FROM 10 TO 300 Hz

September 15, 2009

Author(s)

Ernest L. Madsen, G R. Frank, M A. Hobson, Sheng Lin-Gibson, T J. Hall, J Jiang, T A. Stiles

Accurate determination of the complex shear modulus of soft-tissue-like materials in the 10 to 300 Hz frequency range is very important to researchers in MR...

Observation of the C2H2-N2O van der Waals Complex in the Overtone Range Using CW-CRDS

September 14, 2009

Author(s)

Walter J. Lafferty

A slit nozzle supersonic expansion containing acetylene (0.246l/min) and nitrous oxide (0.355l/min) seeded into Ar (1.26l/min) is investigated using CW cavity...

Ultracold Atom Spin Field Effect Transistor

September 14, 2009

Author(s)

Jay Vaishnav, Julius Ruseckas, Charles W. Clark, Gediminas Juzelunas

We propose a method of constructing cold atom analogs of the spintronic device known as the Datta-Das transistor (DDT), which despite its seminal conceptual...

Elastic modulus of low-k dielectric thin films measured by load-dependent contact-resonance atomic force microscopy

September 14, 2009

Author(s)

Gheorghe Stan, Sean King, Robert F. Cook

Correlated force and contact-resonance versus displacement responses have been resolved using load-dependent contact-resonance atomic force microscopy (AFM) to...

Contact and Stress Anisotropies in Start Up Flows of Collodial Suspensions

September 11, 2009

Author(s)

Nicos Martys, William L. George, Didier Lootens, Pascal Hebraud

Spatio-temporal correlations in start-up flows of attractive colloids are explored by numerical simulations. The suspension is first allowed to flocculate...

Thermal Decomposition Kinetics of Kerosene-based Rocket Propellants. 1. Comparison of RP-1 and RP-2

September 11, 2009

Author(s)

Jason A. Widegren, Thomas J. Bruno

The decomposition kinetics of the kerosene-based rocket propellants RP-1 and RP-2 was studied. For RP-2, decomposition reactions were performed at 375, 400, 425...

A Practical and Systematic Review of Weibull Statistics for Reporting Strengths of Dental Materials

September 11, 2009

Author(s)

Janet Quinn, George D. Quinn

Objective: To review the history, theory and current applications of Weibull analysis sufficient to make informed decisions regarding practical use of the...

Condensed Matter Astrophysics A Prescription for Determining the Species-Specific Composition and Quantity of Interstellar Dust using X-rays

September 10, 2009

Author(s)

Bruce D. Ravel, Julia C. Lee, Jingen Xiang, Jeffrey Kortright, Kathryn Flanagan

We present a new technique for determining the quantity and composition of dust in astrophysical environments using < 6 keV X-rays. We argue that high...

Thermal Decomposition Kinetics of Kerosene-based Rocket Propellants. 2. RP-2 with Three Additives

September 9, 2009

Author(s)

Jason A. Widegren, Thomas J. Bruno

The thermal decomposition of RP-2 with three potential stabilizing additives was investigated. The additives were 1,2,3,4-tetrahydroquinoline (THQ), 1,2,3,4...

False Characteristic Functions and Other Pathologies in Variational Blind Deconvolution. A Method of Recovery.

September 9, 2009

Author(s)

Alfred S. Carasso

Given a blurred image g(x, y), variational blind deconvolution seeks to reconstruct both the unknown blur k(x, y), and the unknown sharp image f(x, y), by...

Collisional cooling of ultra-cold atom ensembles using Feshbach resonances

September 8, 2009

Author(s)

Ludwig G. Mathey, Eite Tiesinga, Paul S. Julienne, Charles W. Clark

We propose a new type of cooling mechanism for ultra-cold fermionic atom ensembles, which capitalizes on the energy dependence of inelastic collisions in the...

Electrochemical Micromachining of Hastelloy B-2 with Ultrashort Voltage Pulses

September 8, 2009

Author(s)

Gordon A. Shaw, Joseph J. Maurer, Steven E. Fick, Thomas P. Moffat, J. J. Mallett, John L. Hudson

Electrochemical micromachining (ECMM) with ultrashort voltage pulses, a maskless all-electrochemical micro and nanofabrication technique, has been used to...

Heat-Assisted Argon Electrospray Interface for Low-Flow Rate Liquid Sample Introduction in Plasma Spectrometry

September 4, 2009

Author(s)

Ryan G. Brennan, Savelas A. Rabb, Gregory C. Turk, Kaveh Jorabchi, William Rutkowski, Akbar Montaser

A heated ({approximately equal}90 °C) laminar flow interface has been designed to assist in the development of an electrospray sample introduction system for...

Complete Methods Set for Scalable Ion Trap Quanum Information Processing

September 4, 2009

Author(s)

Jonathan Home, David Hanneke, John D. Jost, Jason Amini, Dietrich G. Leibfried, David J. Wineland

Building a quantum information processor capable of outperforming classical devices will require many quantum bits (qubits) and very large numbers of logical...

Scaling analysis of the magnetocaloric effect in Gd5Si2Ge1.9X0.1 (X= Al, Cu, Ga, Mn, Fe, Co)

September 4, 2009

Author(s)

V. Franco, A. Conde, Virgil Provenzano, Robert D. Shull

The field dependence of the magnetic entropy change has been studied for a series of doped Gd5Si2Ge2 alloys, which possess a magnetic phase transition that is...

Quantum Correlated Light Beams from NonDegenerate FourWave Mixing in an Atomic Vapor: the D1 and D2 Lines of ^85Rb and ^87Rb

September 3, 2009

Author(s)

Raphael C. Pooser, Alberto M. Marino, Vincent N. Boyer, Kevin M. Jones, Paul D. Lett

We present experimental results showing that quantum correlated light can be produced using non-degenerate, off-resonant, four-wave mixing (4WM) on both the D1...

Optical Properties of Rod-like Metallic Nanostructures: Insight from Theory and Experiment

September 3, 2009

Author(s)

Jinsong Duan, Kyoungweon Park, Robert I. MacCuspie, Richard A. Vaia, Ruth Pachter

In this work, we combined synthesis of metal Au and Au-Ag core-shell NRs, of high-purity and for a broad range of NR aspect ratios, with theoretical prediction...

Generalized temperature measurement equations for rhodamine B dye solution and its application to microfluidics

September 2, 2009

Author(s)

Jayna J. Shah, Michael Gaitan, Jon C. Geist

Contact-less mapping of temperature distributions based on ratios of fluorescent signals is a ubiquitous temperature detection technique. However, application...

Uncalibrated Helium-Neon Lasers in Length Metrology

September 1, 2009

Author(s)

Jack A. Stone Jr.

The vacuum wavelength of a gas laser cannot vary from its central value by more than a few parts in 10^6. Consequently, an uncertainty of this magnitude can be...

The Fundamental Relationships Between Deformation-Induced Surface Roughness, Critical Strain Localization, and Failure in AA5754-O

September 1, 2009

Author(s)

Mark R. Stoudt, Joseph B. Hubbard

The apparent clustering observed in localized strain maps constructed from deformation-induced surface topographies generated in AA5754-O by three in-plane...

Gradient Elution Moving Boundary Electrophoresis (GEMBE) with Channel Current Detection

September 1, 2009

Author(s)

David J. Ross, Eugenia F. Romantseva

Gradient elution moving boundary electrophoresis (GEMBE) is a recently described technique for electrophoretic separations in short (1 cm 3 cm) capillaries or...

Microwave Spectrum of 1,2-Propanediol

September 1, 2009

Author(s)

Francis J. Lovas, David F. Plusquellic, Brooks Pate, Justin L. Neill, Matt T. Muckle, Anthony J. Remijan

The microwave spectrum of the sugar alcohol 1,2-propanediol (CH3CHOHCH2OH) has been measured over the frequency range 6.5 GHz to 25.0 GHz with several pulsed...

Thermophysical Properties Measurements of Rocket Propellants RP-1 and RP-2

September 1, 2009

Author(s)

Stephanie L. Outcalt, Arno R. Laesecke, Karin Brumback

The density, speed of sound, and viscosity of two rocket propellants (RP-1 and RP-2) have been measured. The combined range of the data is from 270 K to 470 K...

High-efficiency photon-number resolving detectors based on hafnium transition-edge sensors

September 1, 2009

Author(s)

Adriana E. Lita, Brice R. Calkins, Lenson Pellouchoud, Aaron J. Miller, Sae Woo Nam

Generation of non-classical states of light is at the foundation of numerous quantum optics experiments and optical quantum information processing...

Early-Age Properties of Cement-Based Materials: II. Influence of Water-to-Cement Ratio

September 1, 2009

Author(s)

Dale P. Bentz, Max A. Peltz, John A. Winpigler

The influence of water-to-cement mass ratio (w/c) on early-age properties of cement-based materials is investigated using a variety of experimental techniques...

Annual Report on Technology Transfer: Approach and Plans, Fiscal Year 2008 Activities and Achievements

September 1, 2009

Author(s)

Paul R. Zielinski

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