Airline Competition: Issues Raised by Consolidation Proposals (open access)

Airline Competition: Issues Raised by Consolidation Proposals

A statement of record issued by the General Accounting Office with an abstract that begins "In May 2000, United Airlines proposed to acquire US Airways and divest part of those assets to create a new airline to be called DC Air. More recently, American Airlines has proposed buying Trans World Airlines (TWA), along with certain assets from United. These proposals have raised questions about how such consolidation in the airline industry could affect competition in general and consumers in particular. Congress, the Department of Justice, and the Department of Transportation need to answer several questions in evaluating the proposed mergers. The proposals by American, TWA, United, US Airways, and DC Air constitute the most significant recent changes that have occured in the airline industry, and the outcome of these decisions could have both positive and negative effects for consumers for years to come. This testimony summarized a December GAO report (GAO-01-212)."
Date: February 7, 2001
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
A User’s Guide to the Congressional Record (open access)

A User’s Guide to the Congressional Record

This report provides a user's guide to the proceedings of the House and Senate, the proceedings of the House and Senate.
Date: February 7, 2001
Creator: Amer, Mildred
Object Type: Report
System: The UNT Digital Library
Cuba: An Economic Primer (open access)

Cuba: An Economic Primer

This report provides an overview of the Cuban economy.
Date: February 7, 2001
Creator: Fergusson, Ian F.
Object Type: Report
System: The UNT Digital Library
STRONTIUM ISOTOPE EVOLUTION OF PORE WATER AND CALCITE IN THE TOPOPAH SPRING TUFF, YUCCA MOUNTAIN , NEVADA (open access)

STRONTIUM ISOTOPE EVOLUTION OF PORE WATER AND CALCITE IN THE TOPOPAH SPRING TUFF, YUCCA MOUNTAIN , NEVADA

Yucca Mountain, a ridge of Miocene volcanic rocks in southwest Nevada, is being characterized as a site for a potential high-level radioactive waste repository. One issue of concern for the future performance of the potential repository is the movement of water in and around the potential repository horizon. Past water movement in this unsaturated zone is indicated by fluid inclusions trapped in calcite coatings on fracture footwall surfaces and in some lithophysal cavities. Some of the fluid inclusions have homogenization temperatures above the present-day geotherm (J.F. Whelan, written communication), so determining the ages of the calcite associated with those fluid inclusions is important in understanding the thermal history of the potential repository site. Calcite ages have been constrained by uranium-lead dating of silica polymorphs (opal and chalcedony) that are present in most coatings. The opal and chalcedony ages indicate that deposition of the calcite and opal coatings in the welded part of the Topopah Spring Tuff (TSw hydrogeologic unit) spanned nearly the entire history of the 12.8-million-year-old rock mass at fairly uniform overall long-term rates of deposition (within a factor of five). Constraining the age of a layer of calcite associated with specific fluid inclusions is complicated. Calcite is commonly …
Date: February 7, 2001
Creator: Marshall, B.D. & Futa, K.
Object Type: Report
System: The UNT Digital Library
Association of ventilation system type with SBS symptoms in office workers (open access)

Association of ventilation system type with SBS symptoms in office workers

This paper provides a review and synthesis of current knowledge about the associations of ventilation system types in office buildings with sick building syndrome symptoms and discusses potential explanations for the associations. Relative to natural ventilation, air conditioning, with or without humidification, was consistently associated with a statistically significant increase in the prevalence of one or more SBS symptoms. Prevalences were typically higher by approximately 30% to 200% in the air conditioned buildings. In two of three assessments from a single study, symptom prevalences were also significantly higher in air conditioned buildings than in buildings with simple mechanical ventilation and no humidification. In approximately half of assessments, SBS symptom prevalences were significantly higher in buildings with simple mechanical ventilation than in buildings with natural ventilation. Insufficient information was available for conclusions about the potential increased risk of SBS symptoms with humidification. The statistically significant associations of mechanical ventilation and air conditioning with SBS symptoms are much more frequent than expected from chance and also not likely to be a consequence of confounding by several potential personal, job, or building related confounders. The reasons for the increases in symptom prevalences with mechanical ventilation and particularly with air conditioning remain unclear. Multiple …
Date: February 7, 2001
Creator: Seppanen, Olli & Fisk, William J.
Object Type: Article
System: The UNT Digital Library
ISCR fiscal year 2000 annual report (open access)

ISCR fiscal year 2000 annual report

None
Date: February 7, 2001
Creator: Keyes, D.
Object Type: Report
System: The UNT Digital Library
Enabling Interoperation of High Performance, Scientific Computing Applications: Modeling Scientific Data with the Sets & Fields (SAF) Modeling System (open access)

Enabling Interoperation of High Performance, Scientific Computing Applications: Modeling Scientific Data with the Sets & Fields (SAF) Modeling System

This paper describes the Sets and Fields (SAF) scientific data modeling system. It is a revolutionary approach to interoperation of high performance, scientific computing applications based upon rigorous, math-oriented data modeling principles. Previous technologies have required all applications to use the same data structures and/or meshes to represent scientific data or lead to an ever expanding set of incrementally different data structures and/or meshes. SAF addresses this problem by providing a small set of mathematical building blocks--sets, relations and fields--out of which a wide variety of scientific data can be characterized. Applications literally model their data by assembling these building blocks. A short historical perspective, a conceptual model and an overview of SAF along with preliminary results from its use in a few ASCI codes are discussed.
Date: February 7, 2001
Creator: Miller, M C; Reus, J F; Matzke, R P; Arrighi, W J; Schoof, L A; Hitt, R T et al.
Object Type: Article
System: The UNT Digital Library
Congressional Record: Its Production, Distribution, and Accessibility (open access)

Congressional Record: Its Production, Distribution, and Accessibility

This report provides information about the Production, Distribution, and Accessibility of Congressional Record. The Congressional Record is the most widely published account of the debates and activities in congress.
Date: February 7, 2001
Creator: Amer, Mildred
Object Type: Report
System: The UNT Digital Library
Labor Standards and International Competition: Section 4(e) of the Fair Labor Standards Act (open access)

Labor Standards and International Competition: Section 4(e) of the Fair Labor Standards Act

This report briefly sketches the origins of Section 4(e), examines its provisions, and the potential for its implementation.
Date: February 7, 2001
Creator: Whittaker, William G.
Object Type: Report
System: The UNT Digital Library
Evidence Against Instanton Dominance of Topological Charge Fluctuations in QCD (open access)

Evidence Against Instanton Dominance of Topological Charge Fluctuations in QCD

The low-lying eigenmodes of the Dirac operator associated with typical gauge field configurations in QCD encode, among other low-energy properties, the physics behind the solution to the U{sub A}(1) problem (i.e. the origin of the {eta}{prime} mass), the nature of spontaneous chiral symmetry breaking, and the physics of string-breaking, quark-antiquark pair production, and the OZI rule. Moreover, the space-time chiral structure of these eigenmodes reflects the space-time topological structure of the underlying gauge field. We present evidence from lattice QCD on the local chiral structure of low Dirac eigenmodes leading to the conclusion that topological charge fluctuations of the QCD vacuum are not instanton-dominated. The result supports Witten's arguments that topological charge is produced by confinement-related gauge fluctuations rather than instantons.
Date: February 7, 2001
Creator: Horvath, Ivan; Isgur, Nathan; McCune, John & Thacker, H. B.
Object Type: Article
System: The UNT Digital Library
Demand Activated Manufacturing Architecture (open access)

Demand Activated Manufacturing Architecture

Honeywell Federal Manufacturing & Technologies (FM&T) engineers John Zimmerman and Tom Bender directed separate projects within this CRADA. This Project Accomplishments Summary contains their reports independently. Zimmerman: In 1998 Honeywell FM&T partnered with the Demand Activated Manufacturing Architecture (DAMA) Cooperative Business Management Program to pilot the Supply Chain Integration Planning Prototype (SCIP). At the time, FM&T was developing an enterprise-wide supply chain management prototype called the Integrated Programmatic Scheduling System (IPSS) to improve the DOE's Nuclear Weapons Complex (NWC) supply chain. In the CRADA partnership, FM&T provided the IPSS technical and business infrastructure as a test bed for SCIP technology, and this would provide FM&T the opportunity to evaluate SCIP as the central schedule engine and decision support tool for IPSS. FM&T agreed to do the bulk of the work for piloting SCIP. In support of that aim, DAMA needed specific DOE Defense Programs opportunities to prove the value of its supply chain architecture and tools. In this partnership, FM&T teamed with Sandia National Labs (SNL), Division 6534, the other DAMA partner and developer of SCIP. FM&T tested SCIP in 1998 and 1999. Testing ended in 1999 when DAMA CRADA funding for FM&T ceased. Before entering the partnership, FM&T discovered …
Date: February 7, 2001
Creator: Bender, T.R. & Zimmerman, J.J.
Object Type: Report
System: The UNT Digital Library
SHORT HISTORY OF THE 1996 WELFARE REFORM LAW (open access)

SHORT HISTORY OF THE 1996 WELFARE REFORM LAW

None
Date: February 7, 2001
Creator: Richardson, Joe & Burke, Vee
Object Type: Report
System: The UNT Digital Library