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The Brand (Abilene, Tex.), Vol. 92, No. 2, Ed. 1, Tuesday, August 31, 2004 (open access)

The Brand (Abilene, Tex.), Vol. 92, No. 2, Ed. 1, Tuesday, August 31, 2004

Weekly student newspaper from Hardin-Simmons University in Abilene, Texas that includes local, state and campus news along with advertising.
Date: August 31, 2004
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History
North Texas Daily (Denton, Tex.), Vol. 89, No. 1, Ed. 1 Tuesday, August 31, 2004 (open access)

North Texas Daily (Denton, Tex.), Vol. 89, No. 1, Ed. 1 Tuesday, August 31, 2004

Weekly student newspaper from the University of North Texas in Denton, Texas that includes local, state and campus news along with advertising.
Date: August 31, 2004
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History

Faculty Recital: 2004-08-31 - James Scott, flute, Leonid Yanovskiy, violin, and Natalia Yuryghina, piano

Access: Use of this item is restricted to the UNT Community
Recital performed at UNT College of Music Concert Hall on August 31, 2004 at 8:00 pm.
Date: August 31, 2004
Creator: Scott, James Copeland; Yanovskiy, Leonid & Yuryghina, Natalia
Object Type: Sound
System: The UNT Digital Library
Federal-Aid Highways: Trends, Effect on State Spending, and Options for Future Program Design (open access)

Federal-Aid Highways: Trends, Effect on State Spending, and Options for Future Program Design

A letter report issued by the Government Accountability Office with an abstract that begins "In 2004, both houses of Congress approved separate legislation to reauthorize the federal-aid highway program to help meet the Nation's surface transportation needs, enhance mobility, and promote economic growth. Both bills also recognized that the Nation faces significant transportation challenges in the future, and each established a National Commission to assess future revenue sources for the Highway Trust Fund and to consider the roles of the various levels of government and the private sector in meeting future surface transportation financing needs. This report (1) updates information on trends in federal, state, and local capital investment in highways; (2) assesses the influence that federal-aid highway grants have had on state and local highway spending; (3) discusses the implications of these trends for the federal-aid highway program; and (4) discusses options for the federal-aid highway program."
Date: August 31, 2004
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
Architect of the Capitol: Midyear Status Report on Implementation of Management Review Recommendations (open access)

Architect of the Capitol: Midyear Status Report on Implementation of Management Review Recommendations

A letter report issued by the Government Accountability Office with an abstract that begins "The Conference Report on the Consolidated Appropriations Resolution, 2003, directed GAO to monitor AOC's progress in implementing recommendations contained in GAO's management review of AOC's operations, issued in January 2003. This is the second status report in which GAO examines the actions taken by AOC to implement selected GAO recommendations. Additionally, the Consolidated Appropriations Resolution, 2003, mandated GAO to assess AOC's Chief Operating Officer's (COO) action plan. This report provides that assessment."
Date: August 31, 2004
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
FBI Transformation: Data Inconclusive on Effects of Shift to Counterterrorism-Related Priorities on Traditional Crime Enforcement (open access)

FBI Transformation: Data Inconclusive on Effects of Shift to Counterterrorism-Related Priorities on Traditional Crime Enforcement

A letter report issued by the Government Accountability Office with an abstract that begins "As a result of the terrorist attacks of September 11, 2001, the Federal Bureau of Investigation (FBI) has committed to a transformation to increase its focus on national security. The FBI has shifted agent resources to its top priorities of counterterrorism, counterintelligence, and cyber crime. Some of these agent resources were shifted away from drug, white-collar, and violent crime enforcement programs. The FBI's drug program has sustained, by far, the largest reduction in FBI agent workforce--about 550 positions, or more than 80 percent of the nonsupervisory field agents who were permanently reprogrammed. In addition, the FBI has had a continuing need to temporarily redirect agents from drug, white-collar, and violent crime enforcement to address counterterrorism-related workload demands. While GAO and other organizations have focused considerable attention on the progress of the FBI's transformation, this report addresses questions about the extent to which the shift in resources has affected federal efforts to combat drug, white-collar, and violent crime and whether other agencies, including the Drug Enforcement Administration (DEA) in the drug enforcement area, are filling gaps created by FBI resource shifts."
Date: August 31, 2004
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
Small Business Administration: SBA Followed Appropriate Policies and Procedures for September 11 Disaster Loan Applications (open access)

Small Business Administration: SBA Followed Appropriate Policies and Procedures for September 11 Disaster Loan Applications

A letter report issued by the Government Accountability Office with an abstract that begins "The Small Business Administration (SBA) played a key role in assisting small businesses affected by the September 11, 2001 terrorist attacks by providing over $1 billion in disaster loans to businesses that sustained physical damage or economic injury. Small businesses in the immediate areas of the attacks and others nationwide that suffered related economic injury were eligible to apply for disaster loans. SBA declined or withdrew about half of these loan applications. SBA's disaster loans are direct federal government loans provided at a subsidized interest rate. In response to concerns that more small businesses impacted by September 11 could have benefited from SBA's disaster loans, GAO conducted a review of its Disaster Loan Program. Specifically, GAO addressed the following questions: (1) Are the disaster program policies consistent with the law and the overall mission of SBA's Disaster Loan Program? (2) What were SBA's underwriting policies and criteria for September 11 Economic Injury Disaster Loans (EIDL) and how did they compare with those applied by nonprofit lenders that were active in New York City after September 11? (3) Did SBA correctly apply its policies and procedures in …
Date: August 31, 2004
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
Tax Administration: IRS Needs to Consider Options for Revising Regulations to Increase the Accuracy of Social Security Numbers on Wage Statements (open access)

Tax Administration: IRS Needs to Consider Options for Revising Regulations to Increase the Accuracy of Social Security Numbers on Wage Statements

A letter report issued by the Government Accountability Office with an abstract that begins "Inaccurate social security numbers (SSN) on wage statements contribute to growth in the Social Security Administration's (SSA) Earnings Suspense File, increase the Internal Revenue Service's (IRS) workload to ensure that wages are properly identified for those earning them, and burden individuals who must work with SSA and IRS to resolve disputes that may affect their social security benefits and tax obligations. IRS's ability to penalize employers for submitting inaccurate SSNs on wage statements is intended to promote SSN accuracy. Items GAO was asked to describe included: (1) the statutory provisions authorizing IRS to penalize employers who file wage statements with inaccurate SSNs; (2) IRS's program to penalize such employers; and (3) the extent IRS's program meets legislative requirements, the likelihood of any penalties, and any program changes being considered."
Date: August 31, 2004
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
Palladium/Copper Alloy Composite Membranes for High Temperature Hydrogen Separation Progress Report (open access)

Palladium/Copper Alloy Composite Membranes for High Temperature Hydrogen Separation Progress Report

This report summarizes progress made during the first year of research funding from DOE Grant No. DE-FG26-03NT41792 at the Colorado School of Mines. The period of performance was September 1, 2003 through August of 2004. Composite membranes, consisting of a thin Pd alloy film supported on a porous substrate have been investigated as a means of reducing the membrane cost and improving H{sub 2} flux. An electroless plating technique was utilized to deposit subsequent layers of palladium and copper over zirconia and alumina-based microfilters. The composite membranes thus made were annealed and tested at temperatures ranging from 250 to 500 C, under very high feed pressures (up to 450 psig) using pure gases and gaseous mixtures containing H{sub 2}, CO, CO{sub 2}, H{sub 2}O and H{sub 2}S, with the purpose of determining the effects these variables had on the H{sub 2} permeation rate, selectivity and percent recovery. The inhibition caused by CO/CO{sub 2} gases on a 7 {micro}m thick Pd-Cu composite membrane was less than 17% over a wide range of compositions at 350 C. H{sub 2}S caused a strong inhibition of the H{sub 2} flux of the same Pd-Cu composite membrane, which is accentuated at levels of 100 ppm …
Date: August 31, 2004
Creator: Way, J. Douglas
Object Type: Report
System: The UNT Digital Library
Pharmacokinetics of Genetically Engineered Antibody Forms Using Positron Emission Tomography (open access)

Pharmacokinetics of Genetically Engineered Antibody Forms Using Positron Emission Tomography

In the last grant period we have focused on multi-step targeting methodologies (MST), as a method for delivery of high dose to the tumor, with low dose to the bone marrow. We have explored uptake in colorectal, pancreatic and prostate cancer, using an special preparation, developed in collaboration with NeoRex A high tumor/bone marrow ratio is clearly achieved with MST, but with a cost, namely the higher dose to normal kidney. For this reason, we have in particular, (a) looked dosimetry for both tumor and normal organ, and especially renal dosimetry, which appears to be the target organ, for Y-90. (b) In parallel with this we have explored the dosimetry of very high dose rate radionuclides, including Holmium-166. (c) In addition, with NaiKong Cheung, we have developed a new MST construct based on the anti-GD2 targeting 5F11; (d) we have successfully completed development of s-factor tables for mice. In summary, renal dosimetry is dominated by about 4-5% of the injected dose being held long-term in the renal cortex, probably in the proximal tubule, due to the universal uptake of small proteins. This appears to be a function of a biotynlated protein binding of the strept-avidin construct, to HSP70. This cortical …
Date: August 31, 2004
Creator: Steven M. Larson, M.D. Nai-Kong Cheung, M.D., Ph.D.
Object Type: Report
System: The UNT Digital Library
DOWNHOLE VIBRATION MONITORING & CONTROL SYSTEM (open access)

DOWNHOLE VIBRATION MONITORING & CONTROL SYSTEM

The deep hard rock drilling environment induces severe vibrations into the drillstring, which can cause reduced rates of penetration (ROP) and premature failure of the equipment. The only current means of controlling vibration under varying conditions is to change either the rotary speed or the weight-on-bit (WOB). These changes often reduce drilling efficiency. Conventional shock subs are useful in some situations, but often exacerbate the problems. The objective of this project is development of a unique system to monitor and control drilling vibrations in a ''smart'' drilling system. This system has two primary elements: (1) The first is an active vibration damper (AVD) to minimize harmful axial, lateral and torsional vibrations. The hardness of this damper will be continuously adjusted using a robust, fast-acting and reliable unique technology. (2) The second is a real-time system to monitor drillstring vibration, and related parameters. This monitor adjusts the damper according to local conditions. In some configurations, it may also send diagnostic information to the surface via real-time telemetry. The AVD is implemented in a configuration using magnetorheological (MR) fluid. By applying a current to the magnetic coils in the damper, the viscosity of the fluid can be changed rapidly, thereby altering the …
Date: August 31, 2004
Creator: Cobern, Martin E.
Object Type: Report
System: The UNT Digital Library
A NEW APPROACH TO RADIONUCLIDE ANALYSIS IN GROUNDWATERS (open access)

A NEW APPROACH TO RADIONUCLIDE ANALYSIS IN GROUNDWATERS

A method using liquid scintillation spectral analysis (LSSA) for analyzing mixtures of radionuclides in groundwater samples, which is fast, simple, and inexpensive, was developed and bench-tested. Samples can be measured in a field laboratory with a new commercial portable liquid scintillation instrument that provides advanced analysis, display, and computational features previously found only in large expensive laboratory models. Results can be available within hours from the time samples are collected. The analysis provides a good measure of total sample activity and a spectral index value that may detect changes in radionuclide distributions from previous analyses when counting statistic are adequate. If a sample shows no change, further analytical costs for it may be avoided. A method that rapidly and quantitatively concentrates very low levels of activity from liter-size samples in minutes was also tested. With some modest improvements in this step, this work offers a completely new methodology and approach to groundwater remediation, which can dramatically reduce analytical costs and speed monitored cleanup and closure in many types of radiological work programs.
Date: August 31, 2004
Creator: HOCHEL, ROBERTC.
Object Type: Article
System: The UNT Digital Library
Vortices, Reconnection and Turbulence in High Electron-Beta Plasmas (open access)

Vortices, Reconnection and Turbulence in High Electron-Beta Plasmas

Plasmas in which the kinetic energy exceeds the magnetic energy by a significant factor are common in space and in the laboratory. Such plasmas can convect magnetic fields and create null points in whose vicinity first the ions become unmagnetized, then the electrons. This project focuses on the detailed study of the transition regime of these plasmas.
Date: August 31, 2004
Creator: Stenzel, R. L.
Object Type: Report
System: The UNT Digital Library
Demonstrating the Feasibility of Molten Aluminum for Destroying Polymeric Encapsulants in SNG-Bearing Metallographic Mounts (open access)

Demonstrating the Feasibility of Molten Aluminum for Destroying Polymeric Encapsulants in SNG-Bearing Metallographic Mounts

DOE-owned spent nuclear fuel (SNF) rods have been cross sectioned and mounted for metallography throughout the history of nuclear reactors. Many hundreds of these ''met mounts'' have accumulated in storage across the DOE complex. However, because of potential hydrogen generation from radiolysis of the polymeric encapsulants, the met mounts are problematic for eventual disposal in a geologic repository.
Date: August 31, 2004
Creator: Stout, Dan & Ploger, Scott
Object Type: Report
System: The UNT Digital Library
Preferred Waterflood Management Practices for the Spraberry Trend Area (open access)

Preferred Waterflood Management Practices for the Spraberry Trend Area

The naturally fractured Spraberry Trend Area is one of the largest reservoirs in the domestic U.S. and is the largest reservoir in area extent in the world. Production from Spraberry sands is found over a 2,500 sq. mile area and Spraberry reservoirs can be found in an eight county area in west Texas. Over 150 operators produce 65,000 barrels of oil per day (bopd) from the Spraberry Trend Area from more than 9,000 production wells. Recovery is poor, on the order of 7-10% due to the profoundly complicated nature of the reservoir, yet billions of barrels of hydrocarbons remain. We estimate over 15% of remaining reserves in domestic Class III reservoirs are in Spraberry Trend Area reservoirs. This tremendous domestic asset is a prime example of an endangered hydrocarbon resource in need of immediate technological advancements before thousands of wells are permanently abandoned. This report describes the final work of the project, ''Preferred Waterflood Management Practices for the Spraberry Trend Area.'' The objective of this project is to significantly increase field-wide production in the Spraberry Trend in a short time frame through the application of preferred practices for managing and optimizing water injection. Our goal is to dispel negative attitudes …
Date: August 31, 2004
Creator: Schechter, David S.
Object Type: Report
System: The UNT Digital Library
Finding of No Significant Impact for the Environmental Assessment for the Strategic Petroleum Reserve West Hackberry Facility Raw Water Intake Pipeline Replacement Cameron and Calcasieu Parishes, Louisiana (open access)

Finding of No Significant Impact for the Environmental Assessment for the Strategic Petroleum Reserve West Hackberry Facility Raw Water Intake Pipeline Replacement Cameron and Calcasieu Parishes, Louisiana

DOE has prepared an Environmental Assessment (EA), DOE/EA-1497, for the proposed replacement of the existing 107 centimeter (cm) [42 inch (in)] 6.87 kilometer (km) [4.27 mile (mi)] raw water intake pipeline (RWIPL). This action is necessary to allow for continued, optimum operations at the West Hackberry facility (main site/facility). The EA described the proposed action (including action alternatives) and three alternatives to the proposed action. The EA evaluated only the potential environmental consequences of the proposed action (one action alternative), and Alternative 3, which consisted of the No Build Action that is required by 10 CFR 1021.321(c). Based on the analysis in DOE/EA-1497, DOE has determined that the proposed action does not constitute a major Federal action significantly affecting humans or the natural environment within the meaning of the National Environmental Policy Act of 1969 (NEPA), 42 USC 4321 et seq. Therefore, an Environmental Impact Statement (EIS) is not required, and DOE is issuing this Finding of No Significant Impact (FONSI). To further minimize impacts to environmental media, the DOE will also implement a Mitigation Action Plan (MAP) for this action. The MAP is included as Appendix F of this EA, which is appended to this FONSI. The Energy Policy …
Date: August 31, 2004
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Development of numerical Grids for UZ Flow and Transport Modeling (open access)

Development of numerical Grids for UZ Flow and Transport Modeling

This report describes the methods used to develop numerical grids of the unsaturated hydrogeologic system beneath Yucca Mountain, Nevada. Numerical grid generation is an integral part of the development of the unsaturated zone (UZ) flow and transport model, a complex, three-dimensional (3-D) model of Yucca Mountain. This revision contains changes made to improve the clarity of the description of grid generation. The numerical grids, developed using current geologic, hydrogeologic, and mineralogic data, provide the necessary framework to: (1) develop calibrated hydrogeologic property sets and flow fields, (2) test conceptual hypotheses of flow and transport, and (3) predict flow and transport behavior under a variety of climatic and thermal-loading conditions. The technical scope, content, and management for the current revision of this report are described in the planning document ''Technical Work Plan for: Unsaturated Zone Flow Analysis and Model Report Integration'' (BSC 2004 [DIRS 169654], Section 2). Grids generated and documented in this report supersede those documented in Revision 00 of this report, ''Development of Numerical Grids for UZ Flow and Transport Modeling'' (BSC 2001 [DIRS 159356]). The grids presented in this report are the same as those developed in Revision 01 (BSC 2003 [DIRS 160109]); however, the documentation of the …
Date: August 31, 2004
Creator: Dobson, P.
Object Type: Report
System: The UNT Digital Library
Users' Guide to ADIC 1.1. (open access)

Users' Guide to ADIC 1.1.

This guide describes the use of the Automatic Differentiation in C (ADIC) system. ADIC is a suite of tools and libraries that automates the process of generating derivatives for scientific programs. In the context of solving PDEs, optimizations, sensitivity analysis, and inverse problems, researchers often require the derivatives {partial_derivative}f/{partial_derivative}x of a function f expressed as a program with respect to some input parameter(s) x. Automatic differentiation (AD) techniques augment the program with derivative computation by applying the chain rule of calculus to elementary operations in an automated fashion. ADIC uses sophisticated compiler techniques to augment the input C programs with derivative computation capability in an automatic fashion. It also provides a finer control of derivative code generation process via control scripts and pragmas. Another significant capability of ADIC is its component architecture, AIF, that allows ADIC's capability to be extended via plug-in modules.
Date: August 31, 2004
Creator: Hovland, P. D. & Norris, B.
Object Type: Report
System: The UNT Digital Library
21st Century Locomotive Technology: Quarterly Technical Status Report 6 DOE/AL68284-TSR06 (open access)

21st Century Locomotive Technology: Quarterly Technical Status Report 6 DOE/AL68284-TSR06

Experimental work to map the performance of the High Pressure Common Rail (HPCR) system on a locomotive is in progress. The experimental trends agree with KIVA modeling predictions. Injection optimization is in progress. Electrically-assisted turbocharger modeling was used to study passenger locomotive performance improvements. Energy storage cycling life testing began, and an improved battery state algorithm was determined. The hybrid locomotive energy storage was prepared for energy management system algorithm testing. Progress in reliable methods for computing optimal driving plans, and methods to reduce the complexity of the necessary optimization are reported.
Date: August 31, 2004
Creator: Salasoo, Lembit; Topinka, Jennifer & Houpt, Paul K.
Object Type: Report
System: The UNT Digital Library
Impermeable Thin Al2O3 Overlay for TBC Protection From Sulfate and Vanadate Attack in Gas Turbines Quarterly Report (open access)

Impermeable Thin Al2O3 Overlay for TBC Protection From Sulfate and Vanadate Attack in Gas Turbines Quarterly Report

To improve the hot corrosion resistance of YSZ thermal barrier coatings, a 25 {micro}m and a 2 {micro}m thick Al{sub 2}O{sub 3} overlay were deposited by HVOF thermal spray onto to the surface of YSZ coating. Oxidation at high temperature and hot corrosion tests showed that Al{sub 2}O{sub 3} overlay deposited on the YSZ TBCs surface can not only reduce the hot corrosion rate, but also significantly prevents the bond coat from oxidation.
Date: August 31, 2004
Creator: Mao, Scott X.
Object Type: Report
System: The UNT Digital Library
Architecture independent performance characterization andbenchmarking for scientific applications (open access)

Architecture independent performance characterization andbenchmarking for scientific applications

A simple, tunable, synthetic benchmark with a performance directly related to applications would be of great benefit to the scientific computing community. In this paper, we present a novel approach to develop such a benchmark. The initial focus of this project is on data access performance of scientific applications. First a hardware independent characterization of code performance in terms of address streams is developed. The parameters chosen to characterize a single address stream are related to regularity, size, spatial, and temporal locality. These parameters are then used to implement a synthetic benchmark program that mimics the performance of a corresponding code. To test the validity of our approach we performed experiments using five test kernels on six different platforms. The performance of most of our test kernels can be approximated by a single synthetic address stream. However in some cases overlapping two address streams is necessary to achieve a good approximation.
Date: August 31, 2004
Creator: Strohmaier, Erich & Shan, Hongzhang
Object Type: Article
System: The UNT Digital Library
CROSS-ROLL FLOW FORMING OF ODS ALLOY HEAT EXCHANGER TUBES FOR HOOP CREEP ENHANCEMENT (open access)

CROSS-ROLL FLOW FORMING OF ODS ALLOY HEAT EXCHANGER TUBES FOR HOOP CREEP ENHANCEMENT

Mechanically alloyed oxide dispersion strengthened (ODS) Fe-Cr-Al alloy thin walled tubes and sheets, produced via powder processing and consolidation methodologies, are promising materials for eventual use at temperatures up to 1200 C in the power generation industry, far above the temperature capabilities of conventional alloys. Target end-uses range from gas turbine combustor liners to high aspect ratio (L/D) heat exchanger tubes. Grain boundary creep processes at service temperatures, particularly those acting in the hoop direction, are the dominant failure mechanisms for such components. The processed microstructure of ODS alloys consists of high aspect ratio grains aligned parallel to the tube axis, a result of dominant axial metal flow which aligns the dispersoid particles and other impurities in the longitudinal direction. The dispersion distribution is unaltered on a micro scale by recrystallization thermal treatments, but the high aspect ratio grain shape typically obtained limits transverse grain spacing and consequently the hoop creep response. Improving hoop creep in ODS-alloy components will require understanding and manipulating the factors that control the recrystallization behavior, and represents a critical materials design and development challenge that must be overcome in order to fully exploit the potential of ODS alloys. The objectives of this program are to …
Date: August 31, 2004
Creator: Kad, Bimal K.
Object Type: Report
System: The UNT Digital Library
Impact of the FY 2005 Building Technologies Program on United States Employment and Earned Income (open access)

Impact of the FY 2005 Building Technologies Program on United States Employment and Earned Income

The Department of Energy (DOE) Office of Energy Efficiency and Renewable Energy (EERE) is interested in assessing the potential economic impacts of its portfolio of subprograms on national employment and income. A special purpose version of the IMPLAN input-output model called ImBuild II is used in this study of all 21 Building Technologies Program subprograms in the EERE final FY 2005 budget request to the Office of Management and Budget on February 2, 2004. Energy savings, investments, and impacts on U.S. national employment and earned income are reported by subprogram for selected years to the year 2030. Energy savings and investments from these subprograms have the potential of creating a total of 396,000 jobs and about $5.6 billion in earned income (2003$) by the year 2030.
Date: August 31, 2004
Creator: Scott, Michael J.; Anderson, Dave M.; Belzer, David B.; Cort, Katherine A.; Dirks, James A.; Elliott, Douglas B. et al.
Object Type: Report
System: The UNT Digital Library
Breeding pond selection and movement patterns by eastern spadefoot toads (Scaphiopus holbrookii) in relation to weather and edaphic conditions. (open access)

Breeding pond selection and movement patterns by eastern spadefoot toads (Scaphiopus holbrookii) in relation to weather and edaphic conditions.

Cathryn H. Greenberg and George W. Tanner. 2004. Breeding pond selection and movement patterns by eastern spadefoot toads (Scaphiopus holbrookii) in relation to weather and edaphic conditions. J. Herp. 38(4):569-577. Abstract: Eastern Spadefoot Toads (Scaphiopus holbrookii) require fish-free, isolated, ephemeral ponds for breeding but otherwise inhabit the surrounding uplands, commonly xeric longleaf pine (Pinus palustris) –wiregrass (Aristida beyrichiana). Hence both pond and upland conditions can potentially affect their breeding biology, and population persistence. Hardwood invasion due to fire suppression in sandhills could alter upland and pond suitability by higher hardwood density and increased transpiration. In this paper we explore breeding and neonatal emigration movements in relation to weather, hydrological conditions of ponds, and surrounding upland matrices. We use 9 years of data from continuous monitoring with drift fences and pitfall traps at 8 ephemeral ponds in 2 upland matrices: regularly-burned, savanna-like sandhills (n = 4), and hardwood-invaded sandhills (n = 4). Neither adult nor neonate captures differed between ponds within the 2 upland matrices, suggesting that they are tolerant of upland heterogeneity created by fire frequency. Explosive breeding occurred during 9 periods and in all seasons; adults were captured rarely otherwise. At a landscape-level rainfall, maximum change in barometric pressure, …
Date: August 31, 2004
Creator: Greenberg, Cathyrn, H. & Tanner, George, W.
Object Type: Article
System: The UNT Digital Library