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600 eV falcon-linac thomson x-ray source
The advent of 3rd generation light sources such as the Advanced Light Source (ALS) at LBL, and the Advanced Photon Source at Argonne, have produced a revolution in x-ray probing of dense matter during the past decade. These machines use electron-synchrotrons in conjunction with undulator stages to produce 100 psec x-ray pulses with photon energies of several kiloelectronvolts (keV). The applications for x-ray probing of matter are numerous and diverse with experiments in medicine and biology, semiconductors and materials science, and plasma and solid state physics. In spite of the success of the 3rd generation light sources there is strong motivation to push the capabilities of x-ray probing into new realms, requiring shorter pulses, higher brightness and harder x-rays. A 4th generation light source, the Linac Coherent Light Source (LCLS), is being considered at the Stanford Linear Accelerator [1]. The LCLS will produce multi-kilovolt x-rays of subpicosecond duration that are 10 orders of magnitude brighter than today's 3rd generation light sources.[1] Although the LCLS will provide unprecedented capability for performing time-resolved x-ray probing of ultrafast phenomena at solid densities, this machine will not be completed for many years. In the meantime there is a serious need for an ultrashort-pulse, high-brightness, …
Date:
December 15, 2000
Creator:
Crane, J. K.; LeSage, G. P.; Ditmire, T.; Cross, R.; Wharton, K.; Moffitt, K. et al.
Object Type:
Report
System:
The UNT Digital Library
Agriculture and the 106th Congress: A Summary of Major Issues
Most congressional interest in agriculture in the 106th Congress was focused on persistent low prices for major commodities and proposals to redress declining farm income. Six emergency farm aid bills were approved, increasing agricultural spending by nearly $27 billion for fiscal years 1999-2001. These bills provided disaster relief along with short term “market loss payments”to farmers to shore up farm income. Some longer term changes also were enacted as part of emergency farm legislation, which this report discusses in brief.
Date:
December 15, 2000
Creator:
Jones, Jean Yavis
Object Type:
Report
System:
The UNT Digital Library
Altus Times (Altus, Okla.), Vol. 101, No. 238, Ed. 1 Friday, December 15, 2000
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 15, 2000
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Analysis of Bulk DKDP Damage Distribution, Obscuration and Pulse Length Dependence
Recent LLNL experiments reported elsewhere at this conference explored the pulselength dependence of 351 nm bulk damage incidence in DKDP. The results found are consistent, in part, with a model in which a distribution of small bulk initiators is assumed to exist in the crystal and the damage threshold is determined by reaching a critical temperature. The observed pulse length dependence can be explained as being set by the most probable defect capable of causing damage at a given pulselength. Analysis of obscuration in side illuminated images of the damaged region yields estimates of the damage site distributions that are in reasonable agreement with the distributions experimentally directly estimated.
Date:
December 15, 2000
Creator:
Feit, M D; Rubenchik, A M & Runkel, M
Object Type:
Article
System:
The UNT Digital Library
Attomole quantitation of protein separations with accelerator mass spectrometry
Quantification of specific proteins depends on separation by chromatography or electrophoresis followed by chemical detection schemes such as staining and fluorophore adhesion. Chemical exchange of short-lived isotopes, particularly sulfur, is also prevalent despite the inconveniences of counting radioactivity. Physical methods based on isotopic and elemental analyses offer highly sensitive protein quantitation that has linear response over wide dynamic ranges and is independent of protein conformation. Accelerator mass spectrometry quantifies long-lived isotopes such as 14C to sub-attomole sensitivity. We quantified protein interactions with small molecules such as toxins, vitamins, and natural biochemicals at precisions of 1-5% . Micro-proton-induced-xray-emission quantifies elemental abundances in separated metalloprotein samples to nanogram amounts and is capable of quantifying phosphorylated loci in gels. Accelerator-based quantitation is a possible tool for quantifying the genome translation into proteome.
Date:
December 15, 2000
Creator:
Vogel, J. S.; Grant, P. G.; Buccholz, B. A.; Dingley, K. & Turteltaub, K. W.
Object Type:
Article
System:
The UNT Digital Library
Aviation Competition: Issues Related to the Proposed United Airlines-US Airways Merger
A letter report issued by the General Accounting Office with an abstract that begins "In May 2000, two of the nation's largest airlines, United Airlines and US Airways, proposed merging. As part of the agreement, United and US Airways also proposed divesting some of the US Airways' assets at Ronald Reagan Washington National Airport to create an airline to be known as DC Air. The Justice Department is now reviewing the proposal to determine if the merger would violate U.S. antitrust laws and, if so, whether the proposed divestiture constitutes an adequate remedy. GAO reviewed the proposed merger and found that it would create an airline so large that it would spur further industry consolidation. The new airline would have more than 25 percent of the total U.S. market and would take in almost $9 billion more than the next largest airline. Although the proposed merger may benefit consumers by boosting competition in some areas, it could also eliminate competition in other areas and reduce consumer choice. DC Air would face significant competitive challenges from other airlines. DC Air would offer smaller aircraft and less frequent service but would seek to compete with other airlines by reducing its fares."
Date:
December 15, 2000
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
The Baytown Sun (Baytown, Tex.), Vol. 79, No. 19, Ed. 1 Friday, December 15, 2000
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
December 15, 2000
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
BioSig: A bioinformatic system for studying the mechanism of intra-cell signaling
Mapping inter-cell signaling pathways requires an integrated view of experimental and informatic protocols. BioSig provides the foundation of cataloging inter-cell responses as a function of particular conditioning, treatment, staining, etc. for either in vivo or in vitro experiments. This paper outlines the system architecture, a functional data model for representing experimental protocols, algorithms for image analysis, and the required statistical analysis. The architecture provides remote shared operation of an inverted optical microscope, and couples instrument operation with images acquisition and annotation. The information is stored in an object-oriented database. The algorithms extract structural information such as morphology and organization, and map it to functional information such as inter-cellular responses. An example of usage of this system is included.
Date:
December 15, 2000
Creator:
Parvin, B.; Cong, G.; Fontenay, G.; Taylor, J.; Henshall, R. & Barcellos-Hoff, M.H.
Object Type:
Article
System:
The UNT Digital Library
The Bladon Lysimeter: An Innovative Environmental Characterization Technology
Chemical analysis of groundwater samples is the baseline method of characterizing and monitoring groundwater contamination in the vadose (unsaturated) zone at most waste sites. Contamination moving from the surface to the water table passes through an unsaturated zone that can range in thickness from a few inches to hundreds of feet at a give site. Lysimeters are samplers that are designed to apply suction to the subsurface and are typically used to collect groundwater in the unsaturated zone.
Date:
December 15, 2000
Creator:
Eddy-Dilek, C.A.
Object Type:
Report
System:
The UNT Digital Library
The Boerne Star (Boerne, Tex.), Vol. 95, No. 100, Ed. 1 Friday, December 15, 2000
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
December 15, 2000
Creator:
Keasling, Edna & Thompson, Mark
Object Type:
Newspaper
System:
The Portal to Texas History
Brady Standard-Herald and Heart O' Texas News (Brady, Tex.), Ed. 1 Friday, December 15, 2000
Semiweekly newspaper from Brady, Texas that includes local, state, and national news along with advertising.
Date:
December 15, 2000
Creator:
Stewart, James E.
Object Type:
Newspaper
System:
The Portal to Texas History
Brownfields: Information on the Programs of EPA and Selected States
A letter report issued by the General Accounting Office with an abstract that begins "The Environmental Protection Agency (EPA) and several states reviewed by GAO have established financial assistance programs to encourage the assessment, cleanup, and redevelopment of brownfields. The programs run by EPA and the states differ in certain aspects, however. Namely, there are differences in the forms of assistance provided, the eligibility criteria, and overall strategies. From fiscal years 1995 through 2000, EPA provided $246.9 million for brownfields assistance while the five states reviewed by GAO provided a combined total of $136 million. GAO found that EPA and the states have difficulty in determining whether their programs are achieving their overall goals. Although EPA maintains a database to track the progress of its program, the data it collects are limited because recipients of EPA's assistance are not required to report on the status of their cleanup projects. The states also have limited information, primarily because they do not track the economic benefits of the assistance they provide or they use forecasted results, rather than actual results, to measure progress."
Date:
December 15, 2000
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
Cityplace Station art reflects geologic & cultural history of urban crossroads
News release about the artistic designs and layout of DART's first subway depot, Cityplace Station.
Date:
December 15, 2000
Creator:
Lyons, Morgan
Object Type:
Text
System:
The Portal to Texas History
The Clifton Record (Clifton, Tex.), Vol. 105, No. 100, Ed. 1 Friday, December 15, 2000
Semi-weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
December 15, 2000
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
Computer Modeling of a Fusion Plasma
Progress in the study of plasma physics and controlled fusion has been profoundly influenced by dramatic increases in computing capability. Computational plasma physics has become an equal partner with experiment and traditional theory. This presentation illustrates some of the progress in computer modeling of plasma physics and controlled fusion.
Date:
December 15, 2000
Creator:
Cohen, B I
Object Type:
Article
System:
The UNT Digital Library
Criticality Safety Evaluation of Hanford Tank Farms Facility
Data and calculations from previous criticality safety evaluations and analyses were used to evaluate criticality safety for the entire Tank Farms facility to support the continued waste storage mission. This criticality safety evaluation concludes that a criticality accident at the Tank Farms facility is an incredible event due to the existing form (chemistry) and distribution (neutron absorbers) of tank waste. Limits and controls for receipt of waste from other facilities and maintenance of tank waste condition are set forth to maintain the margin subcriticality in tank waste.
Date:
December 15, 2000
Creator:
WEISS, E.V.
Object Type:
Report
System:
The UNT Digital Library
Daily Journal (Perry, Okla.), Vol. 107, No. 246, Ed. 1 Friday, December 15, 2000
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 15, 2000
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Dallas Voice (Dallas, Tex.), Vol. 17, No. 33, Ed. 1 Friday, December 15, 2000
Weekly newspaper from Dallas, Texas that includes local, state, and national news and advertising of interest to the Lesbian, Gay, Bisexual, and Transgender (LGBT) community.
Date:
December 15, 2000
Creator:
Vercher, Dennis
Object Type:
Newspaper
System:
The UNT Digital Library
DART making economic impact around Cityplace Station
News release about a study showing the positive economic impact on properties near DART stations in light of the opening of DART's Cityplace station.
Date:
December 15, 2000
Creator:
Lyons, Morgan
Object Type:
Text
System:
The Portal to Texas History
Defense Trade: Observations on Issues Concerning Offsets
Testimony issued by the General Accounting Office with an abstract that begins "Defense offsets are the full range of industrial and commercial benefits that firms provide to foreign governments as inducements or conditions for the purchase of military goods and services. The U.S. government has maintained a "hands off" policy toward defense offsets, viewing them as part of the transaction between the contracting parties. However, offsets are one of the many factors contributing to the globalization of the U.S. industrial base. This testimony presents GAO's observations on (1) the impact of offsets, (2) trends in defense offsets, and (3) the quality and extent of information currently available concerning offsets. Views on the effects of offsets are divided between those who believe that they are both positive and an unavoidable part of doing business overseas and those who believe that they harm the U.S. industrial base. Recently, countries buying U.S. defense items have become increasingly sophisticated in their offset demands. Finally, identifying the effect of offsets on industrial sectors or the U.S. economy as a whole is difficult."
Date:
December 15, 2000
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
Economic Sanctions: Legislation in the 106th Congress
This report tracks legislation relating to the use of economic sanctions in pursuit of foreign policy or national security objectives. Separate sections are given to the areas of greatest activity: sanctions imposed against India and Pakistan; exemptions of food and medicine exports; and sanctions reform. A separate table is included listing sanctions measures that were introduced but received no consideration, including measures pertaining to export controls, nonproliferation, drug certifications, and the sanctions regimes leveled, or proposed to be leveled, against Cuba, Iran, Iraq, Serbia and Montenegro, and other countries.
Date:
December 15, 2000
Creator:
Rennack, Dianne E.
Object Type:
Report
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Friday, December 15, 2000
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 15, 2000
Creator:
Bush, Kent
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Gayly Oklahoman (Oklahoma City, Okla.), Vol. 18, No. 24, Ed. 1 Friday, December 15, 2000
Semi-monthly newspaper from Oklahoma City, Oklahoma that includes local, state, and national news and advertising of interest to the Lesbian, Gay, Bisexual, and Transgender (LGBT) community.
Date:
December 15, 2000
Creator:
Hawkins, Don
Object Type:
Newspaper
System:
The UNT Digital Library
Gender Equity: Men's and Women's Participation in Higher Education
A letter report issued by the General Accounting Office with an abstract that begins "Since Title IX of the Education Amendments was enacted in 1972, women's participation in higher education academic programs has increased significantly. Women's participation in predominantly male fields such as business, law, and medicine has also increased greatly, although changes in other predominantly male fields, such as engineering and physical science, have been smaller. In some predominantly female fields, including elementary education and nursing, there have been increases in the proportion of men receiving degrees. In the 1995-96 school year, first-year college men and women were about as likely to receive financial aid and received about the same average amounts of grant and loan aid. Men continue to outnumber women on faculties in predominantly male fields at colleges and universities. Women's participation in intercollegiate sports at four-year colleges and universities has increased while men's participation has dropped slightly, although they still participate at a higher rate than do women. On average, in the 1998-99 school year, the National Collegiate Athletic Association member schools spent more per male intercollegiate sports participant than female participant in recruiting, coaches' salaries, and operations. However, they spent more on athletic scholarships for …
Date:
December 15, 2000
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library