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Journals

Detection Of Ketenimine (CH₂CNH) in SGRB2(N) Hot Cores

June 28, 2006

Author(s)

Francis J. Lovas, J M. Hollis, A Remijan, P R. Jewell

Ketenimine (CH2CNH) has been detected in absorption toward the star-forming region Sagittarius B2(N) with the 100-m Green Bank Telescope (GBT) by means of three...

Performance Evaluation of Temporal Range Registration for Autonomous Vehicle Navigation

June 28, 2006

Author(s)

Rajmohan (. Madhavan, Elena R. Messina

In this article, we evaluate the performance of an iterative registration algorithm for position estimation of Unmanned Ground Vehicles (UGVs) operating in...

Obstacle Detection using a Time-of -Flight Range Camera for Automated Guided Vehicle Safety and Navigation

June 28, 2006

Author(s)

Roger V. Bostelman, Tsai H. Hong, Rajmohan (. Madhavan

The performance evaluation of an obstacle detection and segmentation algorithm for Automated Guided Vehicle (AGV) navigation in factory-like environments using...

Towards a Tool for Performance Evaluation of Autonomous Vehicle Navigation in Dynamic, On-Road Environments

June 26, 2006

Author(s)

Craig I. Schlenoff, Jerome G. Ajot, Rajmohan Madhavan

We are developing a novel framework, PRIDE (PRediction In Dynamic Environments), to perform moving object prediction (MOP) to assist unmanned ground vehicles in...

Making Interoperability Happen

June 26, 2006

Author(s)

John A. Horst

Learning in a Hierarchical Control System: 4D/RCS in the DARPA LAGR Program

June 26, 2006

Author(s)

James S. Albus, Roger V. Bostelman, Tommy Chang, Tsai H. Hong, William P. Shackleford, Michael O. Shneier

The Defense Applied Research Projects Agency (DARPA) Learning Applied to Ground Vehicles (LAGR) program aims to develop algorithms for autonomous vehicle...

Using 4D/RCS to Address AI Knowledge Integration

June 26, 2006

Author(s)

Craig I. Schlenoff, James S. Albus, Elena R. Messina, Tony Barbera, Rajmohan (. Madhavan, Stephen B. Balakirsky

In this paper, we show how 4D/RCS incorporates and integrates multiple types of disparate knowledge representation techniques into a common, unifying...

Probe-Based Micro-Scale Manipulation and Assembly Using Force Feedback

June 26, 2006

Author(s)

Jason J. Gorman, Nicholas Dagalakis

Repeatable manipulation and assembly of micro-scale components is a critical capability for future developments in opto-electronics, hybrid...

Effect of Copolymer Composition on Acid Catalyzed Deprotection Reaction Kinetics in Model Photoresists

June 25, 2006

Author(s)

Shuhui Kang, Vivek M. Prabhu, B D. Vogt, Eric K. Lin, Wen-Li Wu, Karen Turnquest

The kinetics of an acid-catalyzed deprotection reaction in model photoresist materials was studied as a function of copolymer composition with Fourier Transform...

Advanced Neutron and X-ray Techniques for Insights into the Microstructure of EB-PVD Thermal Barrier Coatings

June 25, 2006

Author(s)

A Kulkarni, A N. Goland, H Herman, Andrew J. Allen, T A. Dobbins, F DeCarlo, J Ilavsky, Gabrielle G. Long, S Fang, P Lawton

Phase Formation, Crystal Chemistry, and Properties in the Magnetic Dielectric System Bi₂O_3-Fe₂O_3-Nb₂O₅

June 22, 2006

Author(s)

M W. Lufaso, Terrell A. Vanderah, I M. Pazos, Igor Levin, Juan C. Nino, Virgil Provenzano, Peter K. Schenck, Robert S. Roth

Subsolidus phase relations have been determined for the Bi2O3-Fe2O3-Nb2O5 system in air (900-1075 C). Three new ternary phases were observed Bi3Fe0.5Nb1.5O9...

Facilitating the Culture of Mammalian Nerve Cells with Polyelectrolyte Multilayers

June 20, 2006

Author(s)

Samuel Forry, D. R. Reyes, Michael Gaitan, Laurie E. Locascio

Natural Linewidth of the 401-nm Laser-Cooling Transition in Er I

June 20, 2006

Author(s)

Jabez McClelland

A measurement of the natural linewidth of the 401 nm 4f 126s 2 ( 3H 6) rarr} 4f 12( 3H)6s6p ( 1P o 1) (6,1) 7 o transition in Er I is presented. Using laser...

Large-Scale Calculation of Dielectronic Recombination Parameters for Mg-Like Fe

June 20, 2006

Author(s)

I Murakami, T Kato, D Kato, U I. Safronova, T E. Cowan, Yuri Ralchenko

Energy levels, radiative transition probabilities, and autoionization rates for $1s^22s^22p^63l'nl$ ($n$=3-12, $l \le n-1$) and $1s^22s^22p^64l'nl$ ($n$=4-7, $l...

In Situ Stress and Nanogravimetric Measurements During Underpotential Deposition of Pb on (111)-Textured Au

June 16, 2006

Author(s)

Gery R. Stafford, Ugo Bertocci

The surface stress associated with the underpotential deposition (upd) of lead on (111)-textured Au is examined, using the wafer curvature method, in acidic...

Quantum dots a versatile tool in plant science?

June 15, 2006

Author(s)

F. Mueller, A. Houben, Peter E. Barker, Yan Xiao, J. Kas, M. Melzer

Subsolidus Phase Relationships of the BaO-R2O3-CuOz (R=Eu, Dy, and Ho) Systems under Carbonate-Free Conditions at T = 810 ?C and pO2 = 100 Pa.

June 15, 2006

Author(s)

Winnie K. Wong-Ng, Zhi Yang, Lawrence P. Cook, Julia Frank, Mario Loung

For applications of phase equilibria to second-generation coated-conductor high Tc superconductor processing, phase diagrams constructed under carbonate-free...

X-Ray Topography for Fractography of Single-Crystal Components

June 15, 2006

Author(s)

David R. Black, George D. Quinn

X-ray diffraction topography, which is sensitive to local strain and/or crystallographic orientation, provides a unique view of single-crystal samples both...

Atom-based stabilization for laser-pumped atomic clocks

June 15, 2006

Author(s)

Vladislav Gerginov, V Shah, Svenja A. Knappe, Leo W. Hollberg, John E. Kitching

We describe a novel technique for stabilizing frequency shifts in laser-interrogated vapor-cell atomic clocks. The method suppresses frequency shifts due to...

Stable isotopic analysis of atmospheric methane by infrared spectroscopy by use of diode laser difference-frequency generation

June 10, 2006

Author(s)

M. E. Trudeau, Pin Chen, G de Andreade Garcia, Leo W. Hollberg, P P. Tans

An infrared absorption spectrometer has been constructed to measure the stable isotopic composition of atmospheric methane samples. The spectrometer employs...

Soft X-Ray Absorption Spectroscopy of the MgB₂ Boron K Edge in an MgB₂/Mg Composite

June 8, 2006

Author(s)

Daniel A. Fischer, A R. Moodenbaugh, Q Li, G Gu, Y Zhu, J W. Davenport, D O. Welch, H Su

Soft x-ray absorption (XAS), using fluorescence yield, was used to study the boron K near edge in MgB2 superconductor. The sample consists of MgB2 crystallites...

Correlating Molecular Design to Microstructure in Thermally Convertible Oligothiophenes: The Effect of Branched versus Linear End Groups

June 8, 2006

Author(s)

Dean M. DeLongchamp, Youngsuk Jung, Daniel A. Fischer, Eric K. Lin, P C. Chang, V Subramanian, A R. Murphy, J M. Frechet

The thin film microstructure development of functionalized oligothiophenes with branched, thermally removable groups at each end of conjugated cores with five...

Correlating molecular design to microstructure in thermally convertible oligothiophenes: the effect of branched versus Linear End Groups

June 8, 2006

Author(s)

Dean M. DeLongchamp, Yeon-Gil Jung, Daniel A. Fischer, Eric K. Lin, Paul C. Chang, V Subramanian, A R. Murphy, J M. Frecher

Energy Levels and Spectral Lines of Ne VIII

June 7, 2006

Author(s)

Alexander Kramida, M-C Buchet-Poulizac

All experimental data on the valence-shell-excited and inner-shell-excited spectra of Li-like neon, including previously unpublished beam-foil spectroscopy data...

Improvements in the Measurement of Distillation Curves - Part 1: A Composition-Explicit Approach

June 7, 2006

Author(s)

Thomas J. Bruno

The distillation (or boiling) curve of a complex fluid is a critically important indicator of the bulk behavior or response of the fluid. For this reason, the...

Improvements in the Measurement of Distillation Curves - Part 2: Application to Aerospace/Aviation Fuels RP-1 and S-8

June 7, 2006

Author(s)

Thomas J. Bruno, Beverly L. Smith

In a previous paper, a number of improvements in the method and apparatus used for the measurement of distillation curves for complex hydrocarbon fluid mixtures...

Solution and Surface Composition Gradients via Microfluidic Confinement: Fabrication of a Statistical-Copolymer-Brush Composition Gradient

June 6, 2006

Author(s)

Chang Xu, Susan E. Barnes, Tao Wu, Daniel A. Fischer, Dean M. DeLongchamp, J Batteas, Kathryn L. Beers

A simple method to generate solution gradients through microfluidic confinement is described. The solution gradient inside a microchannel was formed by varying...

An Octagonal Architecture for High Strength PIT Nb₃Sn Conductors

June 6, 2006

Author(s)

L. R. Motowidlo, E Barzi, D. Turrioni, Najib Cheggour, Loren F. Goodrich

Powder-in-Tube (PIT) Nb 3Sn conductors have been fabricated utilizing a low-cost intermetallic Cu 5Sn 4 powder as the tin source. A novel octagonal PIT design...

Kinetics Governing Phase Separation of Nanostructured Sn(x)Ge(1a 'x) Alloys.

June 5, 2006

Author(s)

Regina Regan, Harry A. Atwater, Jonathan E. Guyer, Erik Meserole, Mark S. Gorrsky

We have studied the dynamic phenomenon of SnxGe1a 'x/Ge phase separation during deposition by molecular beam epitaxy on Ge(001) substrates.Phase-separation...

Nature of the Transient BaF2-Related Phases in the -BaF2- Processing of Ba2YCu3O7-x Superconductors

June 3, 2006

Author(s)

Winnie K. Wong-Ng, Lawrence P. Cook, Ron Feenstra

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