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Letter to the Editors of Physics Today

Description: Two points in our recent article on Edward Teller's scientific life (Physics Today, August 2004, page 45) require correction. In our description of Teller's students, we incorrectly stated that Arthur Kantrowitz's thesis was on the generation of hypersonic molecular beams. Actually, his thesis was on heat capacity lags in gas dynamics. Kantrowitz's invention of high intensity sources for molecular beams came later in his career. Maurice Goldhaber has emphasized that the situation with respect t… more
Date: November 11, 2004
Creator: Libby, S B & Weiss, M S
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A Study of the Ion Hose Instability in the DARHT-II Downstream Transport Region

Description: The second axis of the DARHT flash X-ray facility at Los Alamos National Laboratory (''DARHT-II'') is a multiple-pulse, 18.4 MeV, 2 kA induction electron linear accelerator [1]. A train of short ({approx}50 ns) pulses are converted via bremsstrahlung to X-rays, which are then used to make radiographic images at various times (nominally four) during a ''hydrotest'' experiment. The train of pulses is created by carving them out of a two microsecond long macropulse, using a fast switching element … more
Date: November 11, 2004
Creator: McCarrick, J F
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

NotCal04 - Comparison / Calibration 14C records 26-50 cal kBP

Description: The radiocarbon calibration curve, IntCal04, extends back to 26 cal kBP. While several high resolution records exist beyond this limit, these data sets exhibit discrepancies one to another of up to several millennia. As a result, no calibration curve for the time range 26-50 cal kBP can be recommended as yet, but in this paper the IntCal04 working group compares the available data sets and offers a discussion of the information that they hold.
Date: November 11, 2004
Creator: der Plicht, J. V.; Beck, J.; Bard, E. & Baille, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Single-State Electronic Structure Measurements Using Time-Resolved X-Ray Laser Induced Photoelectron Spectroscopy

Description: We demonstrate single-shot x-ray laser induced time-of-flight photoelectron spectroscopy on semiconductor and metal surfaces with picosecond time resolution. The LLNL COMET compact tabletop x-ray laser source provides the necessary high photon flux (>10{sup 12}/pulse), monochromaticity, picosecond pulse duration, and coherence for probing ultrafast changes in the city, chemical and electronic structure of these materials. Static valence band and shallow core-level photoemission spectra are p… more
Date: November 11, 2004
Creator: Nelson, A J; Dunn, J; van Buuren, T & Hunter, J
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Rapid Generation of a Nanocrystal-Labeled Peptide Library for Specific Identification of the Bacterium Clostrium Botulinum

Description: Several peptide libraries containing up to 2 million unique peptide ligands have been synthesized. The peptides are attached onto a 80 micron resin and the length of these peptide ligands ranges from 5 to 9 amino acid residues. Using a novel calorimetric assay, the libraries were screened for binding to the ganglioside-binding domain of Clostridium Tetanus Toxin, a structural similar analog of the Clostridium Botulinum toxin. Several binding peptide sequences were identified, in which the detai… more
Date: November 11, 2004
Creator: Tok, J B
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

[Frank W. Mayborn Award for Community Leadership]

Description: A record on the former and current winners of the Frank W. Mayborn Award for Community Leadership, that dates back to 1992 and goes until 2005. The record names the winner as well as the newspaper company they work for.
Date: November 11, 2004
Creator: Texas Daily Newspaper Association
Item Type: Refine your search to only Text
Partner: UNT Libraries Special Collections
open access

Comparison of Electron Cloud Simulation and Experiments in the High-Current Experiment

Description: Contaminating clouds of electrons are a common concern for accelerators of positive-charged particles, but there are some unique aspects of heavy-ion accelerators for fusion and high-energy density physics which make modeling such clouds especially challenging. In particular, self-consistent electron and ion simulation is required, including a particle advance scheme which can follow electrons in regions where electrons are strongly, weakly, and un-magnetized. We describe our approach to such s… more
Date: November 11, 2004
Creator: Cohen, R H; Friedman, A; Covo, M K; Lund, S M; Molvik, A W; Bieniosek, F M et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Measurement of Thermal Diffusity and Flow Resistance for TCAP Materials

Description: SRS uses the Thermal Cycling Absorption Process (TCAP) to separate isotopes of hydrogen. The frequency of thermal cycles is a limit of the productivity of the process and that frequency is largely determined by the thermal diffusivity of the absorbent material. For a given tube diameter, a larger thermal diffusivity decreases the time required for each cycle. In 1998, the Engineering Development Laboratory measured thermal diffusivity and thermal conductivity for three TCAP materials in helium.
Date: November 11, 2004
Creator: Steimke, John
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A comparative analysis of business structures suitable forfarmer-owned wind power projects in the United States

Description: For years, farmers in the United States have looked with envy on their European counterparts' ability to profitably farm the wind through ownership of distributed, utility-scale wind projects. Only within the past few years, however, has farmer- or community-owned wind power development become a reality in the United States. The primary hurdle to this type of development in the United States has been devising and implementing suitable business and legal structures that enable such projects to t… more
Date: November 11, 2004
Creator: Bolinger, Mark & Wiser, Ryan
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

DOE THREE-DIMENSIONAL STRUCTURE AND PHYSICAL PROPERTIES OF A METHANE HYDRATE DEPOSIT AND GAS RESERVOIR, BLAKE RIDGE

Description: This report contains a summary of work conducted and results produced under the auspices of award DE-FC26-00NT40921, ''DOE Three-Dimensional Structure and Physical Properties of a Methane Hydrate Deposit and Gas Reservoir, Blake Ridge.'' This award supported acquisition, processing, and interpretation of two- and three-dimensional seismic reflection data over a large methane hydrate reservoir on the Blake Ridge, offshore South Carolina. The work supported by this project has led to important ne… more
Date: November 11, 2004
Creator: Holbrook, W. Steven
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department

[Man standing in doorway of train car]

Description: Fotografía de un hombre con sombrero de vaquero, camisa de vestir y vaqueros azules, de pie en la puerta de un tren. El hombre parece estar tomando notas en una hoja de papel sobre sus palmas. A la derecha de la fotografía se ve un montón de sillas de plástico.
Date: November 11, 2004
Creator: Castillo, José L.
Item Type: Refine your search to only Photograph
Partner: UNT Libraries Special Collections

[Room with paneled walls and tiled floor]

Description: Una fotografía de una habitación. Hay varios marcos en la pared, junto con un pato montado y una tira de papel pintado de pato. A la izquierda de la foto hay un sofá estampado con un cojín con un pavo. Junto al sofá hay una mesa con una lámpara iluminada frente a la ventana. Frente al sofá hay una pequeña mesa con varias revistas de Texas. A lo largo de la pared hay un banco con cojines, con material de lectura adicional a un lado. También se pueden ver calabazas decorativas.
Date: November 11, 2004
Creator: Castillo, José L.
Item Type: Refine your search to only Photograph
Partner: UNT Libraries Special Collections

[Display of antiques]

Description: Photograph of wicker chairs stacked on top of a green-tiled and wooden desk. In front of the desk is a matching chair, with a crockpot on top of it. A dark chair to the right holds a few loose books on display.
Date: November 11, 2004
Creator: Castillo, José L.
Item Type: Refine your search to only Photograph
Partner: UNT Libraries Special Collections

[Land with trees]

Description: Aerial photograph of the Texas landscape showing trees and bodies of water. A building is visible near the middle of the photograph and there is a reflection from the window of the airplane.
Date: November 11, 2004
Creator: Castillo, José L.
Item Type: Refine your search to only Photograph
Partner: UNT Libraries Special Collections
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