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Search Publications

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Displaying 31076 - 31100 of 73697

A Computational Model of the Human Visual Cortex

March 20, 2008
Author(s)
James S. Albus
The brain is first and foremost a control system that is capable of building an internal representation of the external world, and using this representation to make decisions, set goals and priorities, formulate plans, and control behavior with intent to

Aluminum UPD and Alloy Formation on (111)-Textured Au in AlCl_{3}-EMImCl

March 20, 2008
Author(s)
Gery R. Stafford, G Haarberg
The kinetics of Al-Au surface alloy formation was examined during Al underpotential deposition (upd) onto (111)-texture Au from Lewis acidic aluminum chloride-1-ethyl-3-methlimidazolium chloride (AlCl_{3}-EMImCl)using linear sweep stripping voltammetry

Performance Analysis for Stable Mobile Robot Navigation Solutions

March 20, 2008
Author(s)
Christopher J. Scrapper Jr, Rajmohan Madhavan, Stephen B. Balakirsky
Robot navigation in complex, dynamic and unstructured environments demands robust mapping and localization solutions. One of the most popular methods in recent years has been the use of scan-matching schemes where temporally correlated sensor data sets are

ASTM E-57 3D Imaging Systems Committee: An Update

March 19, 2008
Author(s)
Alan M. Lytle, Geraldine S. Cheok, Kamel S. Saidi
In 2006, ASTM committee E57 was established to develop standards for the performance evaluation of 3D imaging systems. The committee's initial focus is on standards for 3D imaging systems typically used for applications including, but not limited to

ASTM E57 3D Imaging Systems Committee: An Update

March 19, 2008
Author(s)
Geraldine S. Cheok, Alan M. Lytle, Kamel S. Saidi
In 2006, an ASTM committee (E57) was established to develop standards for the performance evaluation of 3D imaging systems. The initial focus for the committee is on standards for 3D imaging systems typically used for applications including, but not

Density and Speed of Sound Measurements of Methyl- and Propylcyclohexane

March 19, 2008
Author(s)
Arno D. Laesecke, Stephanie L. Outcalt, Karin Brumback
The density and speed of sound of liquid methylcyclohexane and propylcyclohexane were measured with two vibrating-tube densimeters and a time-of-flight method, respectively. The combined range of the data is from 270 K to 470 K with pressures to 40 MPa

Modified Predictive Formula for the Electron Stopping Power

March 19, 2008
Author(s)
Aleksander Jablonski, S Tanuma, Cedric J. Powell
We report an improved predictive formula for the electron stopping power (SP) based on an analysis and fit of SPs and electron inelastic mean free paths (IMFPs) calculated from optical data for 37 elemental solids and energies between 200 eV and 30 keV

Imaging with modular linear arrays of cryogenic Nb microbolometers

March 17, 2008
Author(s)
Erich N. Grossman, Charles Dietlein, Jon E. Bjarnason, Mabel Ramirez, M. Leivo, J. A. Penttila, P. Helisto, A. Luukanen
We present ultrawideband imagery obtained with modular, 8-element, superconducting Nb microbolometer arrays. Conically scanned images are presented and compared with raster-scanned images obtained on the same arrays and from similar NbN arrays at VTT

On Test Collections for Adaptive Information Retrieval

March 17, 2008
Author(s)
Ellen M. Voorhees
Traditional Cranfield test collections represent an abstraction of a retrieval task that Sparck Jones calls the core competency of retrieval: a task that is necessary, but not sufficient, for user retrieval tasks. The abstraction facilitates research by

CALCULATED REGENERATOR PERFORMANCE AT 4 K WITH HELIUM-4 AND HELIUM-3

March 16, 2008
Author(s)
Ray Radebaugh, Yonghua Huang, Agnes O?Gallagher, John Gary
The helium-4 working fluid in regenerative cryocoolers operating with the cold end near 4 K deviates considerably from an ideal gas. As a result, losses in the regenerator, given by the time-averaged enthalpy flux, are increased and are strong functions of

Measurement Issues in Single-Wall Carbon Nanotubes

March 15, 2008
Author(s)
S Arepalli, Stephen W. Freiman, Stephanie A. Hooker, Kalman D. Migler
Recommended Practice Guide for Single Wall Carbon Nanotube Characterization consisting of five chapters: Introduction; Thermogravimetric Analysis (TGA) ; Near-IR Spectroscopy (NIR), Raman Spectroscopy, Optical, Electron, and Scanned Probe Microscopy.

Liposome-Templated Supramolecular Assembly of Responsive Alginate Nanogels

March 14, 2008
Author(s)
Jennifer S. Hong, Wyatt N. Vreeland, Silvia H. De Paoli Lacerda, Laurie E. Locascio, Michael Gaitan, Srinivasa R. Raghavan
Nanosized gel particles (nanogels) are of interest for a variety of applications, including controlled release of drugs and single-molecule encapsulation. Here, we employ the cores of nanoscale liposomes as reaction vessels to template the assembly of

Optical Lattice Induced Light Shifts in a Yb Atomic Clock

March 14, 2008
Author(s)
Zeb Barber, Jason Stalnaker, Nathan D. Lemke, Christopher W. Oates, Tara M. Fortier, Scott A. Diddams, Leo W. Hollberg, C Hoyt
We present an experimental study of the lattice induced light shifts on the $^1S_0\rightarrow\,^3P_0$ clock transition of ytterbium. The ``magic'' frequency for the $^{174}$Yb isotope was determined to be $u_{magic} = 394\,799\,475(35)$MHz. The

Quantitative Measurement of Outgas Products From EUV Photoresists

March 14, 2008
Author(s)
Charles S. Tarrio, Bruce A. Benner Jr, Robert E. Vest, Steven E. Grantham, Shannon B. Hill, Thomas B. Lucatorto, Jay H. Hendricks, Patrick J. Abbott, Greg Denbeaux, Alin Antohe, Chimaobi Mbanaso, Kevin Orbek
The photon-stimulated emission of organic molecules from the photoresist during exposure is a serious problem for extreme- ultraviolet lithography (EUVL) because the adsorption of the outgassing products on the EUV optics can lead to carbonization and

Spin Transfer Precessional Dynamics in Co 60 Fe 20 B 20 Nanocontacts

March 14, 2008
Author(s)
William H. Rippard, Matthew R. Pufall, Michael L. Schneider, Kevin Garello, Stephen E. Russek
We report on the precessional dynamics in spin transfer oscillators having Co 60Fe 20B 20 free layers as a function of annealing time at 225 °C. Repeated annealing reduces the critical current I c by roughly a factor of 3 and increases the tunability of

ADHESION TEST METHOD FOR SPRAYED APPLIED FIRE RESISTANT MATERIALS

March 12, 2008
Author(s)
Christopher C. White, Kar T. Tan, Donald L. Hunston
Fire resistive materials are exceptional at providing an effective thermal barrier to structural steel from the heat flux from a fire, provided it is in close proximity to the steel during the fire event. The adhesion of the fire resistive materials is
Displaying 31076 - 31100 of 73697
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