2002 Gordon Research Conference on Molecular Evolution (open access)

2002 Gordon Research Conference on Molecular Evolution

Emphasis was placed on current unpublished research and discussion of the future target areas in this field.
Date: January 18, 2002
Creator: unknown
Object Type: Article
System: The UNT Digital Library
Anomalous Capacitive Sheath with Deep Radio Frequency Electric Field Penetration (open access)

Anomalous Capacitive Sheath with Deep Radio Frequency Electric Field Penetration

A novel nonlinear effect of anomalously deep penetration of an external radio-frequency electric field into a plasma is described. A self-consistent kinetic treatment reveals a transition region between the sheath and the plasma. Because of the electron velocity modulation in the sheath, bunches in the energetic electron density are formed in the transition region adjusted to the sheath. The width of the region is of order V(subscript T)/omega, where V(subscript T) is the electron thermal velocity, and w is frequency of the electric field. The presence of the electric field in the transition region results in a cooling of the energetic electrons and an additional heating of the cold electrons in comparison with the case when the transition region is neglected.
Date: January 18, 2002
Creator: Kaganovich, Igor D.
Object Type: Report
System: The UNT Digital Library
Appropriations for FY2002: Labor, Health and Human Services, and Education (open access)

Appropriations for FY2002: Labor, Health and Human Services, and Education

Appropriations are one part of a complex federal budget process that includes budget resolutions, appropriations (regular, supplemental, and continuing) bills, rescissions, and budget reconciliation bills. This report is a guide to one of the 13 regular appropriations bills that Congress passes each year. It is designed to supplement the information provided by the House and Senate Labor, Health and Human Services, and Education Appropriations Subcommittees.
Date: January 18, 2002
Creator: Irwin, Paul M.
Object Type: Report
System: The UNT Digital Library
Best Practices: Taking a Strategic Approach Could Improve DOD's Acquisition of Services (open access)

Best Practices: Taking a Strategic Approach Could Improve DOD's Acquisition of Services

A letter report issued by the General Accounting Office with an abstract that begins "GAO studied several leading companies in the private sector that have made dramatic changes to their process for acquiring services. GAO found that these changes generally began with a corporate decision to pursue a more strategic approach to acquiring services--from developing a better picture of what the company was actually spending on services to developing new ways of doing business. The Defense Department (DOD), the government's largest purchaser of services, already has some elements in place that are essential to such a strategic approach, such as a commitment by top management to adopting best practices. However, DOD has yet to conduct a comprehensive analysis of its spending on services or thoroughly assess it's current structure, processes, and roles. DOD's size, the range and complexity of the services that it acquires, the capacity of its information and financial systems, and the unique requirements of the federal government are among the factors that DOD will need to consider as it tailors a strategic approach to its diverse needs."
Date: January 18, 2002
Creator: United States. General Accounting Office.
Object Type: Report
System: The UNT Digital Library
The Budget for Fiscal Year 2001 (open access)

The Budget for Fiscal Year 2001

This report is about the budget for the fiscal year 2001.
Date: January 18, 2002
Creator: Winters, Philip D.
Object Type: Report
System: The UNT Digital Library
Campaign Finance Bills in the 107th Congress: Comparison of S. 27 (McCain-Feingold), H.R. 2356 (Shays-Meehan), H.R. 2630 (Ney-Wyn), and Current Law (open access)

Campaign Finance Bills in the 107th Congress: Comparison of S. 27 (McCain-Feingold), H.R. 2356 (Shays-Meehan), H.R. 2630 (Ney-Wyn), and Current Law

S. 27 (McCain-Feingold), the Bipartisan Campaign Reform Act of 2001, was introduced January 22, 2001 in a form similar to prior versions of the last two Congresses. On April 2, after a two-week debate and adoption of 22 amendments, the Senate passed S. 27 by a vote of 59-41. That measure’s companion Shays-Meehan bill, the Bipartisan Campaign Finance Reform Act of 2001, was initially introduced as H.R. 380 in a form similar to House-passed versions of the prior two Congresses; on June 28, the bill was modified and offered as H.R. 2356. H.R. 2360 (Ney-Wynn), the Campaign Finance Reform and Grassroots Citizen Participation Act of 2001, was introduced and ordered reported favorably by the House Administration Committee on June 28. (Shays-Meehan was ordered reported unfavorably at the same time.) The two primary features of the bills are restrictions on party soft money and issue advocacy.
Date: January 18, 2002
Creator: Cantor, Joseph E. & Whitaker, L. Paige
Object Type: Report
System: The UNT Digital Library
The CDF-II silicon tracking system (open access)

The CDF-II silicon tracking system

The CDFII silicon tracking system, SVX, for Run II of the Fermilab Tevatron has up to 8 cylindrical layers with average radii spanning from {approx} (1.5 to 28.7) cm, and lengths ranging from {approx} (90 to 200) cm for a total active-area of {approx} 6 m{sup 2} and {approx} 7.2 x 10{sup 5} readout channels. SVX will improve the CDFII acceptance and efficiency for both B and high-Pt physics dependent upon b-tagging. Along with the description of the SVX we report some alignment survey data from the SVX assembly phase and the actual status of the alignment as it results from the offline data analysis. The problems encountered are also reviewed.
Date: January 18, 2002
Creator: al., F. Palmonari et
Object Type: Article
System: The UNT Digital Library
Characterization of prototype BTeV silicon pixel sensors before and after irradiation (open access)

Characterization of prototype BTeV silicon pixel sensors before and after irradiation

We report on measurements performed on silicon pixel sensor prototypes exposed to a 200 MeV proton beam at the Indiana University Cyclotron Facility. The sensors are of n{sup +}/n/p{sup +} type with multi-guard ring structures and p-stop electrode isolation. Electrical characterization of such devices was performed before and after irradiation up to proton fluence of 4 x 10{sup 14} p cm{sup -2}. We tested pixel sensors fabricated from normal and oxygen-enriched silicon wafers and with two different p-stop isolation layouts: common p-stop and individual p-stop.
Date: January 18, 2002
Creator: al., Maria Rita Coluccia et
Object Type: Article
System: The UNT Digital Library
Charitable Choice: Overview of Research Findings on Implementation (open access)

Charitable Choice: Overview of Research Findings on Implementation

A briefing report issued by the General Accounting Office with an abstract that begins "Charitable choice provisions require states and localities to allow religious organizations to compete for federal funding on the same basis as other social service providers, without impairing the religious character of such organizations. Congress has been considering legislation to expand charitable choice provisions to other government programs. At least 19 states have contracted with faith-based organizations (FBOs) to provide some welfare services. Moreover, states are using various approaches to implement charitable choice legislation. For example, some states have created state faith-based liaisons to promote greater awareness of charitable choice provisions or removed barriers to contracting with FBOs. Several factors have limited the establishment of collaborations between FBOs and states, including some FBOs' lack of awareness and understanding of charitable choice provisions, their reluctance to partner with government, and the limited financial and administrative capacity of some FBOs. Once collaborations have occurred, some small FBOs have had problems (1) covering ongoing costs while awaiting government reimbursement or (2) managing the performance-based contracts because of limited technological and management systems. GAO found no information with which to assess the effectiveness of FBOs as providers of social services. Although …
Date: January 18, 2002
Creator: United States. General Accounting Office.
Object Type: Report
System: The UNT Digital Library
Chemistry and Processing of Nanostructured Materials (open access)

Chemistry and Processing of Nanostructured Materials

Nanostructured materials can be formed through the sol-gel polymerization of inorganic or organic monomer systems. For example, a two step polymerization of tetramethoxysilane (TMOS) was developed such that silica aerogels with densities as low as 3 kg/m{sup 3} ({approx} two times the density of air) could be achieved. Organic aerogels based upon resorcinol-formaldehyde and melamine-formaldehyde can also be prepared using the sol-gel process. Materials of this type have received significant attention at LLNL due to their ultrafine cell sizes, continuous porosity, high surface area and low mass density. For both types of aerogels, sol-gel polymerization depends upon the transformation of these monomers into nanometer-sized clusters followed by cross-linking into a 3-dimensional gel network. While sol-gel chemistry provides the opportunity to synthesize new material compositions, it suffers from the inability to separate the process of cluster formation from gelation. This limitation results in structural deficiencies in the gel that impact the physical properties of the aerogel, xerogel or nanocomposite. In order to control the properties of the resultant gel, one should be able to regulate the formation of the clusters and their subsequent cross-linking. Towards this goal, we are utilizing dendrimer chemistry to separate the cluster formation from the gelation so …
Date: January 18, 2002
Creator: Fox, G A; Baumann, T F; Hope-Weeks, L J & Vance, A L
Object Type: Report
System: The UNT Digital Library
Combating Terrorism: Are There Lessons to Be Learned from Foreign Experiences? (open access)

Combating Terrorism: Are There Lessons to Be Learned from Foreign Experiences?

As the United States braces for possible repeated incidents of international terrorism in the United States, there may be lessons to be learned from the experiences of other countries which have suffered prolonged onslaughts of terrorism. The utility of each approach, as well as of specific measures, can depend on a variety of factors, including the nature and organization of a terrorist group, public attitudes toward it, and the depth of support for it. This paper looks briefly at some cases where judgments have been made on the effectiveness of different policy measures, and raises questions relating those outcomes to the current situation.
Date: January 18, 2002
Creator: Serafino, Nina M.
Object Type: Report
System: The UNT Digital Library
Commissioning and operation of the CDF silicon detector (open access)

Commissioning and operation of the CDF silicon detector

The CDF-II silicon detector has been partially commissioned and used for taking preliminary physics data. This paper is a report on commissioning and initial operations of the 5.8m{sup 2} silicon detector. This experience can be useful to the large silicon systems that are presently under construction.
Date: January 18, 2002
Creator: D'Auria, S.
Object Type: Article
System: The UNT Digital Library
The Debt Limit: The Need to Raise It After Four Years of Surpluses (open access)

The Debt Limit: The Need to Raise It After Four Years of Surpluses

This report discusses the need to raise the debt limit after Four Years of Surpluses.Due to the continuing rise in government account held debt and the expectation of a government deficit in fiscal year 2002, the Administration requested, in December 2001, that Congress increase the limit.
Date: January 18, 2002
Creator: Winters, Philip D.
Object Type: Report
System: The UNT Digital Library
Defense Acquisitions: Collection and Reporting of Information Technology Purchases (open access)

Defense Acquisitions: Collection and Reporting of Information Technology Purchases

A letter report issued by the General Accounting Office with an abstract that begins "Recent legislation requires that, beginning in October 2001, the Defense Department (DOD) collect procurement data on purchases of information technology (IT) products and services worth more than $100,000. DOD is required to issue its first annual report to Congress by March 2001. GAO found that DOD is making good progress in meeting the requirements of the legislation. DOD has modified data collection systems to enable them to collect and report mandated data. DOD officials see no obstacles to issuing their first report on IT data collection efforts by the March 2002 deadline."
Date: January 18, 2002
Creator: United States. General Accounting Office.
Object Type: Report
System: The UNT Digital Library
Development of NOx Sensors for Heavy Vehicle Applications (open access)

Development of NOx Sensors for Heavy Vehicle Applications

A DOE CRADA was initiated in February 2000 between Ford Motor Company and the US Department of Energy's Oak Ridge National Laboratory (ORNL). The overall objective of the research agreement was to characterize the performance of emission sensors and identify potential areas of improvement and to develop improved insulating materials with a lower capacitance to minimize radio frequency (RF) interference. A bench-scale device was developed at ORNL to evaluate sensor performance. The test stand was designed to enable control of the gas composition, flow rate, and temperature. An air-actuated three-way valve was used to control the injection of the test gas in order to elucidate the transient behavior of the sensor. The major finding from the studies was that transient test results showed that response time of the sensor to NO was highly dependent on the temperature. The time constant decreased with increasing gas temperature and achieved a constant valve of 610 ms for temperatures greater than or equal to 350 C. The steady-state valves O{sub 2} and NO{sub x} pumping currents were measured under steady-state conditions using a picoammeter. The measured pumping currents were extremely low and required an electrically quiet environment for accurate readings. ORNL developed also modified …
Date: January 18, 2002
Creator: Armstrong, T. R. & Soltis, R. E.
Object Type: Report
System: The UNT Digital Library
District of Columbia: Status of the New Convention Center Project (open access)

District of Columbia: Status of the New Convention Center Project

Testimony issued by the General Accounting Office with an abstract that begins "Since GAO issued its November 2001 report (GAO-02-182R) on the new Washington Convention Center, the Washington Convention Center Authority (WCCA) and the construction manager have made significant progress in their negotiations to reset the Guaranteed Maximum Price (GMP). The two parties have agreed on the two most critical components of the GMP proposal: price and time frames for completing the new convention center. A special meeting of WCCA's board of directors has been scheduled for early to mid-February to review and officially act on the proposed GMP agreement. The revised GMP amount of $590.7 million represents a $71.3 million, or 13.7 percent, increase over the estimated GMP amount of $519.4 million cited in GAO's report."
Date: January 18, 2002
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Education Research: Education Should Improve Assessments of R&D Centers, Regional Labs, and Comprehensive Centers (open access)

Education Research: Education Should Improve Assessments of R&D Centers, Regional Labs, and Comprehensive Centers

A letter report issued by the General Accounting Office with an abstract that begins "Research and Development (R&D) Centers, Regional Labs, and Comprehensive Centers support the Department of Education's research agenda to various degrees. Because statutes define different missions and activities for these programs, the amount and focus of the research and other research-based activities they support varies. Education shapes the priorities that guide the research done by the R&D Centers and targets the technical assistance provided by the Comprehensive Centers through requirements in agreements with these entities. However, Education has little control over the activities of the Regional Labs because, unlike most federal education programs, neither federal nor state governments have oversight responsibility for their programs. The R&D Centers, Regional Labs, and Comprehensive Centers reported collaborating and coordinating with each other and Education and cited various factors that have either facilitated or hindered such activities. They said that they were most likely to engage in these activities when they shared a common interest in a specific student population, such as English language learners, or in a specific topic, such as assessment. Current evaluation practices for assessing the R&D Centers, Regional Labs, and Comprehensive Centers have provided only limited information …
Date: January 18, 2002
Creator: United States. General Accounting Office.
Object Type: Report
System: The UNT Digital Library
Further studies on hydration of alkynes by the PtCl4-CO catalyst (open access)

Further studies on hydration of alkynes by the PtCl4-CO catalyst

Under CO atmosphere, between 80 and 120 C, a glyme solution of PtCl{sub 4} forms a carbonyl compound that promotes hydration of internal as well as terminal alkynes to give aldehyde-free ketones. The catalytic process depends strongly on the electronic and steric nature of the substrates. Part of the carbonyl functions of the catalyst can be replaced by phosphine ligands. Chiral DIOP reacts with the PtCl{sub 4}-CO compound to give a catalyst that promotes partial kinetic resolution of a racemic alkyne. Replacement of part of the CO by polystyrene-bound diphenylphosphine enables to attach the catalyst to the polymeric support. Upon entrapment of the platinum compound in a silica sol-gel matrix, it reacts as a partially recyclable catalyst. A reformulated mechanism for the PdCl{sub 4}-CO catalyzed hydration is suggested on the basis of the present study.
Date: January 18, 2002
Creator: Israelsohn, Osnat; Vollhardt, K. Peter C. & Blum, Jochanan
Object Type: Article
System: The UNT Digital Library
Industrial Hygiene Concerns during the Decontamination and Decommissioning of the Tokamak Fusion Test Reactor (open access)

Industrial Hygiene Concerns during the Decontamination and Decommissioning of the Tokamak Fusion Test Reactor

A significant industrial hygiene concern during the Decontamination and Decommissioning (D and D) of the Tokamak Fusion Test Reactor (TFTR) was the oxidation of the lead bricks' surface, which were utilized for radiation shielding. This presented both airborne exposure and surface contamination issues for the workers in the field removing this material. This paper will detail the various protection and control methods tested and implemented to protect the workers, including those technologies deployed to decontaminate the work surfaces. In addition, those techniques employed to recycle the lead for additional use at the site will be discussed.
Date: January 18, 2002
Creator: Lumia, M.E. & Gentile, C.A.
Object Type: Report
System: The UNT Digital Library
Internet Commerce and State Sales and Use Taxes (open access)

Internet Commerce and State Sales and Use Taxes

In theory, state sales and use taxes are based on the destination principle, which prescribes that taxes should be paid where the consumption takes place. States are concerned because they anticipate gradually losing more tax revenue as the growth of Internet commerce allows more residents to buy products from vendors located out-of-state and evade use taxes. The size of the revenue loss from Internet commerce and subsequent tax evasion is uncertain. Congress is involved in this issue because commerce conducted by parties in different states over the Internet falls under the Commerce Clause of the Constitution. The degree of congressional involvement is an open question.
Date: January 18, 2002
Creator: Maguire, Steven
Object Type: Report
System: The UNT Digital Library
Internet Commerce and State Sales and Use Taxes (open access)

Internet Commerce and State Sales and Use Taxes

State governments rely on sales and use taxes for approximately one-third (32.3%) of their total tax revenue – or approximately $174 billion in FY2000. Local governments derived 16.4% of their tax revenue or $51.6 billion from local sales and use taxes in FY1999. Both state and local sales taxes are collected by vendors at the time of transaction and are levied at a percentage of a product’s retail price. Alternatively, use taxes are not collected by vendors if they do not have nexus (loosely defined as a physical presence) in the consumer’s state. Consumers are required to remit use taxes to their taxing jurisdiction. However, compliance with this requirement is quite low. Because of the low compliance, many observers suggest that the expansion of the internet as a means of transacting business across state lines, both from business to consumer (B to C) and from business to business (B to B), threatens to diminish the ability of state and local governments to collect sales and use taxes. Congress has a role in this issue because commerce between parties in different states conducted over the Internet falls under the Commerce Clause of the Constitution. Congress can either take an active or …
Date: January 18, 2002
Creator: Maguire, Steven
Object Type: Report
System: The UNT Digital Library
Internet Commerce and State Sales and Use Taxes (open access)

Internet Commerce and State Sales and Use Taxes

State governments rely on sales and use taxes for approximately one-third (32.3%) of their total tax revenue – or approximately $174 billion in FY2000. Local governments derived 16.4% of their tax revenue or $51.6 billion from local sales and use taxes in FY1999. Both state and local sales taxes are collected by vendors at the time of transaction and are levied at a percentage of a product’s retail price. Alternatively, use taxes are not collected by vendors if they do not have nexus (loosely defined as a physical presence) in the consumer’s state. Consumers are required to remit use taxes to their taxing jurisdiction. However, compliance with this requirement is quite low. Because of the low compliance, many observers suggest that the expansion of the internet as a means of transacting business across state lines, both from business to consumer (B to C) and from business to business (B to B), threatens to diminish the ability of state and local governments to collect sales and use taxes. Congress has a role in this issue because commerce between parties in different states conducted over the Internet falls under the Commerce Clause of the Constitution. Congress can either take an active or …
Date: January 18, 2002
Creator: Maguire, Steven
Object Type: Report
System: The UNT Digital Library
Isomerization of linear to angular [3]phenylene and PAHs under flash vacuum pyrolysis conditions (open access)

Isomerization of linear to angular [3]phenylene and PAHs under flash vacuum pyrolysis conditions

None
Date: January 18, 2002
Creator: Dosa, Peter I.; Schleifenbaum, Andreas & Vollhardt, K. Peter C.
Object Type: Article
System: The UNT Digital Library
Magnetic Field Generation through Angular Momentum Exchange between Circularly Polarized Radiation and Charged Particles (open access)

Magnetic Field Generation through Angular Momentum Exchange between Circularly Polarized Radiation and Charged Particles

The interaction between circularly polarized (CP) radiation and charged particles can lead to generation of magnetic field through an inverse Faraday effect. The spin of the circularly polarized electromagnetic wave can be converted into the angular momentum of the charged particles so long as there is dissipation. We demonstrate this by considering two mechanisms of angular momentum absorption relevant for laser-plasma interactions: electron-ion collisions and ionization. The precise dissipative mechanism, however, plays a role in determining the efficiency of the magnetic field generation.
Date: January 18, 2002
Creator: Shvets, G.; Fisch, N. J. & Rax, J.-M.
Object Type: Report
System: The UNT Digital Library