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139
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53
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46
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9
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Early Childhood Programs: The Use of Impact Evaluations to Assess Program Effects
A letter report issued by the General Accounting Office with an abstract that begins "This report examines the use of impact evaluations to determine program effectiveness for early childhood programs. GAO (1) describes the value of conducting impact evaluations, (2) describes their current use in evaluating selected early childhood education and care programs and (3) discusses the value of other types of early childhood education and care studies the Department of Health and Human Services (HHS) and Education promote and sponsor. GAO found that many researchers consider impact evaluations to be the best method of determining the extent to which the program itself is causing participant outcomes. Two federal programs that focus on early childhood education--Head Start and Even Start--are now being studied using impact evaluations. Both of these programs are intended to improve children's school readiness and educational outcomes, including enhanced literacy. HHS is conducting two studies on its Head Start program, which will cost about $28.3 million, and Education will conduct a $21 million study on its Even Start program. Finally, HHS and Education promote and sponsor many types of research and evaluation studies. The value of a varied study agenda is that it provides agencies with answers …
Date:
April 16, 2001
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
Federal Real Property: Better Governmentwide Data Needed for Strategic Decisionmaking
A letter report issued by the General Accounting Office with an abstract that begins "For 50 years, the General Services Administration (GSA) has maintained the federal government's real property assets, including military installations, office buildings, laboratories, courthouses, postal facilities, and embassies. Separately, the Department of the Treasury produces annual financial information on these assets. GSA's worldwide inventory is the only central source of detailed information on on the government's real property inventory, such as addresses, square footage, acquisition dates, and property type. GAO found that GSA's inventory contains unreliable data. The inventory lacks key data for budgeting and strategic management, such as space utilization, facility condition, historical significance, security, and facility age. Poor communication between GSA and the reporting agencies, technical difficulties with agency data, and resource constraints contributed to the problems. GSA lacks the authority to require agencies to submit data and has been pursuing real property reform legislation. The agency has also begun to improve the effectiveness of the worldwide inventory as a decisionmaking tool. With OMB's concurrence, GSA suspended the reporting process for fiscal year 2001 and plans to develop an enhanced database with real-time capabilities to complement the yearly inventory reports."
Date:
April 16, 2002
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
Highlights of a Forum Convened by the Comptroller General of the United States: Improving the Federal Government's Financial Management Systems
Other written product issued by the Government Accountability Office with an abstract that begins "Since the enactment of key financial management reforms, such as the Chief Financial Officers (CFO) Act of 1990 and the Federal Financial Management Improvement Act of 1996 (FFMIA), the federal government has devoted significant resources to improving financial management activities and practices. At the same time, continuing attention is needed to address persistent, long-standing accountability problems and to redefine success for federal financial management. Successfully implementing financial management systems has been a particular challenge to the federal government. Many agency financial management systems do not routinely produce the accurate, timely, and meaningful information needed for management decision making. This forum brought together knowledgeable and recognized financial management leaders from the federal government, including the CFO, Chief Information Officer, and Inspector General communities, and selected other officials with extensive experience in financial management from both the public and private sectors. The forum addressed (1) the future of federal financial management, (2) applying lessons learned from federal financial management system implementations, and (3) strategies for transforming federal financial management culture. These highlights do not necessarily represent the views of the organizations that the participants represent, including GAO."
Date:
April 16, 2008
Creator:
United States. Government Accountability Office.
Object Type:
Text
System:
The UNT Digital Library
St. Elizabeths Hospital: Real Property Issues Related to the West Campus
A letter report issued by the General Accounting Office with an abstract that begins "The west campus of St. Elizabeths hospital is a unique property that is generally acknowledged to be in poor condition. GAO concludes that a significant sum of money and much work would be needed to prepare the west campus for reuse. This work would include stabilizing and mothballing the buildings for the period of time when the excess and disposal process will take place, developing plans for protection and maintenance, addressing environmental and historic preservation issues, studying potential uses for the property, and identifying user(s). The historic significance of the property, as well as the economic implications of its reuse for the District of Columbia will be key factors to be considered in determining the property's future. A successful outcome that is agreeable to all the interested stakeholders and is in the government's best interest will be a challenging and complex task."
Date:
April 16, 2001
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
Solar heating system for the First Baptist Church, 1500 E. Melgaard Road, Aberdeen, South Dakota 57401. Final report
This report includes the following: (1) acceptance test plan, (2) systems performance data, (3) pictures of completed system, (4) problems in building the system, (5) description of the system, (6) major maintenance problems, (7) revised blueprints, (8) installation, operation, and maintenance manuals, and (9) recommendations.(MOW)
Date:
April 16, 1979
Creator:
Salem, H.E.
Object Type:
Report
System:
The UNT Digital Library
Summary Cost Data for Federally-Facilitated Exchanges, 2014
This report discusses the Patient Protection and Affordable Care Act (ACA, P.L. 111-148, as amended), which contains a number of provisions that affect the individual health insurance market.
Date:
April 16, 2014
Creator:
Elan, Nicholas; Fernandez, Bernadette & Mach, Annie L.
Object Type:
Report
System:
The UNT Digital Library
Who Pays for Long-Term Services and Supports? A Fact Sheet
This report discusses the long-term services and supports (LTSS) that refer to a broad range of health and health-related services and supports needed by individuals over an extended period of time.
Date:
April 16, 2014
Creator:
Colello, Kirsten J.
Object Type:
Report
System:
The UNT Digital Library
Homeland Defense: U.S. Northern Command Has Made Progress but Needs to Address Force Allocation, Readiness Tracking Gaps, and Other Issues
A letter report issued by the Government Accountability Office with an abstract that begins "It has been 5 years since the Department of Defense (DOD) established U.S. Northern Command (NORTHCOM) to conduct homeland defense and civil support missions in the United States. Planning operations in the United States poses unique challenges for traditional military planning. GAO was asked to assess (1) the status of NORTHCOM's plans and the challenges it faces in planning and conducting operations, (2) the number, experience, and training of planning personnel, and (3) the extent to which NORTHCOM coordinates with other federal agencies. To do this, GAO reviewed available NORTHCOM plans, compared them to joint operational planning criteria, compared planning staff with those at other commands, and reviewed documentation and mechanisms for interagency coordination."
Date:
April 16, 2008
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Aviation Safety: FAA Efforts Have Improved Safety, but Challenges Remain in Key Areas
Testimony issued by the Government Accountability Office with an abstract that begins "The Federal Aviation Administration (FAA) is responsible for approving the design and airworthiness of new aircraft and equipment before they are introduced into service. FAA approves changes to aircraft and equipment based on evaluation of industry submissions against standards set forth in federal aviation regulations and related guidance documents. In September 2011, we reported that, overall, FAA did a good job following its certification processes in assessing the composite fuselage and wings of Boeing's 787 against its airworthiness standards. However, the approval process--referred to as certification--presents challenges for FAA in terms of resources and maintaining up-to-date knowledge of industry practices, two issues that may hinder FAA's efforts to conduct certifications in an efficient and timely manner. FAA is currently assessing its certification process and identifying opportunities to streamline it."
Date:
April 16, 2013
Creator:
United States. Government Accountability Office.
Object Type:
Text
System:
The UNT Digital Library
Federal Support for Renewable and Advanced Energy Technologies
Testimony issued by the Government Accountability Office with an abstract that begins ""
Date:
April 16, 2013
Creator:
United States. Government Accountability Office.
Object Type:
Text
System:
The UNT Digital Library
Tax Credit Bonds: Overview and Analysis
Tax Credit Bonds (TCBs) are a type of bond that offers the holder a federal tax credit instead of interest. This report explains the tax credit mechanism and describes the market for the bonds. It also discusses related pieces of legislation and what the most common uses of the proceeds from TCBs are.
Date:
April 16, 2009
Creator:
Maguire, Steven
Object Type:
Report
System:
The UNT Digital Library
LOWER BOUNDS ON SELF-FOCUSING SO AS TO MAINTAIN RING INTEGRITY NEAR THE INITIATION OF ACCELERATION IN AN ELECTRON RING ACCELERATOR
Relationships necessary for ring stability are derived between the self-focusing forces of an electron ring and the magnetic field gradient defocusing forces present near and just subsequent to the start of ring acceleration.
Date:
April 16, 1970
Creator:
Pellegrini, Claudio & Sessler, Andrew.
Object Type:
Article
System:
The UNT Digital Library
Strings on AdS2 and the high-energy limit of noncritical M-theory
Abstract. Noncritical M-theory in 2+1 dimensions has been defined as a double-scaling limit of a nonrelativistic Fermi liquid on a flat two-dimensional plane. Here we study this noncritical M-theory in the limit of high energies, analogous to the alpha' --> infinity limit of string theory. In the related case of two-dimensional Type 0A strings, it has been argued that the conformal alpha' --> infinity limit leads to AdS_2 with a propagating fermion whose mass is set by the value of the RR flux. Here we provide evidence that in the high-energy limit, the natural ground state of noncritical M-theory similarly describes the AdS_2 x S1 spacetime, with a massless propagating fermion. We argue that the spacetime effective theory in this background is captured by a topological higher-spin extension of conformal Chern-Simons gravity in 2+1 dimensions, consistently coupled to a massless Dirac field. Intriguingly, the two-dimensional plane populated by the original nonrelativistic fermions is essentially the twistor space associated with the symmetry group of the AdS_2 x S1 spacetime; thus, at least in the high-energy limit, noncritical M-theory can be nonperturbatively described as a"Fermi liquid on twistor space.''
Date:
April 16, 2007
Creator:
Horava, Petr; Horava, Petr & Keeler, Cynthia A.
Object Type:
Article
System:
The UNT Digital Library
The Use Of Scanning Probe Microscopy To Investigate Crystal-Fluid Interfaces
Over the past decade there has been a natural drive to extend the investigation of dynamic surfaces in fluid environments to higher resolution characterization tools. Various aspects of solution crystal growth have been directly visualized for the first time. These include island nucleation and growth using transmission electron microscopy and scanning tunneling microscopy; elemental step motion using scanning probe microscopy; and the time evolution of interfacial atomic structure using various diffraction techniques. In this lecture we will discuss the use of one such in situ method, scanning probe microscopy, as a means of measuring surface dynamics during crystal growth and dissolution. We will cover both practical aspects of imaging such as environmental control, fluid flow, and electrochemical manipulation, as well as the types of physical measurements that can be made. Measurements such as step motion, critical lengths, nucleation density, and step fluctuations, will be put in context of the information they provide about mechanistic processes at surfaces using examples from metal and mineral crystal growth.
Date:
April 16, 2007
Creator:
Orme, C. A. & Giocondi, J. L.
Object Type:
Book
System:
The UNT Digital Library
Meteorological Monitoring Program, Particulate Matter Ambient Air Quality Monitoring Report, January Through December 1996
None
Date:
April 16, 1997
Creator:
TRW Environmental Safety Systems, Inc.
Object Type:
Report
System:
The UNT Digital Library
EVALUATION OF RADIONUCLIDE ACCUMULATION IN SOIL DUE TO LONG-TERM IRRIGATION
Radionuclide accumulation in soil due to long-term irrigation is an important part of the model for predicting radiation dose in a long period of time. The model usually assumes an equilibrium condition in soil with a constant irrigation rate, so that radionuclide concentration in soil does not change with time and can be analytically solved. This method is currently being used for the dose assessment in the Yucca Mountain project, which requires evaluating radiation dose for a period of 10,000 years. There are several issues associated with the method: (1) time required for the equilibrium condition, (2) validity of constant irrigation rate, (3) agricultural land use for a long period of time, and (4) variation of a radionuclide concentration in water. These issues are evaluated using a numerical method with a simple model built in the GoldSim software. Some key radionuclides, Tc-99, Np-237, Pu-239, and Am-241 are selected as representative radionuclides. The results indicate that the equilibrium model is acceptable except for a radionuclide that requires long time to accumulate in soil and that its concentration in water changes dramatically with time (i.e. a sharp peak). Then the calculated dose for that radionuclide could be overestimated using the current equilibrium …
Date:
April 16, 2006
Creator:
Wu, De Wesley
Object Type:
Article
System:
The UNT Digital Library
Measurement of the Branching Fractions of the Rare Decays B0 to Ds(*)+pi-,B0 to Ds(*)+rho-, and B0 to Ds(*)-K(*)+
The authors report the measurement of the branching fractions of the rare decays B{sup 0} {yields} D{sub s}{sup (*)+} {pi}{sup -}, B{sup 0} {yields} D{sub s}{sup (*)+} {rho}{sup -}, and B{sup 0} {yields} D{sub s}{sup (*)-} K{sup (*)+} in a sample of 381 x 10{sup 6} {Upsilon}(4S) decays into B{bar B} pairs collected with the BABAR detector at the PEP-II asymmetric-energy e{sup +}e{sup -} storage ring. They present evidence for the decay B{sup 0} {yields} D{sub s}{sup -} K*{sup +} and the vector-vector decays B{sup 0} {yields} D{sub s}{sup *+} {rho}{sup -} and B{sup 0} {yields} D{sub s}{sup *-} K{sup *+}, as well as the first measurement of the vector meson polarization in these decays. They also determine the ratios of the CM-suppressed to CKM-favored amplitudes r(D{sup (*)}{pi}) and r(D{sup (*)}{rho}) in decays B{sup 0} {yields} D{sup (*)}{sup {+-}}{pi}{sup {-+}} and B{sup 0} {yields} D{sup (*)}{sup {+-}}{rho}{sup {-+}}, and comment on the prospects for measuring the Cp observable sin(2{beta} + {gamma}).
Date:
April 16, 2008
Creator:
Aubert, B.; Bona, M.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prencipe, E. et al.
Object Type:
Article
System:
The UNT Digital Library
Search for New Physics Beyond the Standard Model at BaBar
A review of selected recent BaBar results are presented that illustrate the ability of the experiment to search for physics beyond the standard model. The decays B {yields} {tau}{nu} and B {yields} s{gamma} provide constraints on the mass of a charged Higgs. Searches for Lepton Flavour Violation could provide a clear signal for beyond the standard model physics. Babar does not observe any signal for New Physics with the current dataset.
Date:
April 16, 2008
Creator:
Barrett, Matthew & U., /Brunel
Object Type:
Article
System:
The UNT Digital Library
CALCULATION OF DEMONSTRATION BULK VITRIFICATION SYSTEM MELTER INLEAKAGE AND OFF-GAS GENERATION RATE
The River Protection Project (RPP) mission is to safely store, retrieve, treat, immobilize, and dispose of the Hanford Site tank waste. The Demonstration Bulk Vitrification System (DBVS) is a research and development project whose objective is to demonstrate the suitability of Bulk Vitrification treatment technology waste form for disposing of low-activity waste from the Tank Farms. The objective of this calculation is to determine the DBVS melter inleakage and off-gas generation rate based on full scale testing data from 38D. This calculation estimates the DBVS melter in leakage and gas generation rate based on test data. Inleakage is estimated before the melt was initiated, at one point during the melt, and at the end of the melt. Maximum gas generation rate is also estimated.
Date:
April 16, 2008
Creator:
TH, MAY
Object Type:
Report
System:
The UNT Digital Library
Making Amines Strong Bases: Thermodynamic Stabilization ofProtonated Guests in a Highly-Charged Supramolecular Host
A highly-charged, cavity-containing supramolecular assembly formed by metal-ligand interactions acts as a host to dramatically shift the effective basicity of encapsulated protonated amine guests. The scope of encapsulated protonated amine and phosphine guests shows size selectivity consistent with a constrained binding environment. Protonation of the encapsulated guests is confirmed by {sup 31}P NMR studies, mass spectrometry studies, and the pH dependence of guest encapsulation. Rates of guest self-exchange were measured using the Selective Inversion Recovery method and were found to correlate with the size rather than the basicity of the guests. The activation parameters for guest self-exchange are consistent with the established mechanism for guest exchange. The binding constants of the protonated amines are then used to calculate the effective basicity of the encapsulated amines. Depending on the nature of the guest, shifts in the effective basicities of the encapsulated amines of up to 4.5 pK{sub a} units are observed, signifying a substantial stabilization of the protonated form of the guest molecule and effectively making phosphines and amines strong bases.
Date:
April 16, 2007
Creator:
Pluth, Michael D.; Bergman, Robert G. & Raymond, Kenneth N.
Object Type:
Article
System:
The UNT Digital Library
Correlation between Strand Stability and Magnet Performance
Magnet programs at BNL, LBNL and FNAL have observed instabilities in high J{sub c} Nb{sub 3}Sn strands and magnets made from these strands. This paper correlates the strand stability determined from a short sample-strand test to the observed magnet performance. It has been observed that strands that carry high currents at high fields (greater than 10T) cannot sustain these same currents at low fields (1-3T) when the sample current is fixed and the magnetic field is ramped. This suggests that the present generation of strand is susceptible to flux jumps (FJ). To prevent flux jumps from limiting stand performance, one must accommodate the energy released during a flux jump. To better understand FJ this work has focused on wire with a given sub-element diameter and shows that one can significantly improve stability by increasing the copper conductivity (higher residual resistivity ratio, RRR, of the Cu). This increased stability significantly improves the conductor performance and permits it to carry more current.
Date:
April 16, 2005
Creator:
Dietderich, Daniel R.; Bartlett, Scott E.; Caspi, Shlomo; Ferracin, Paolo; G ourlay, Stephen A.; Higley, Hugh C. et al.
Object Type:
Article
System:
The UNT Digital Library
Optimization of sparse matrix-vector multiplication on emerging multicore platforms
We are witnessing a dramatic change in computer architecture due to the multicore paradigm shift, as every electronic device from cell phones to supercomputers confronts parallelism of unprecedented scale. To fully unleash the potential of these systems, the HPC community must develop multicore specific optimization methodologies for important scientific computations. In this work, we examine sparse matrix-vector multiply (SpMV)--one of the most heavily used kernels in scientific computing--across a broad spectrum of multicore designs. Our experimental platform includes the homogeneous AMD dual-core and Intel quad-core designs, as well as the highly multithreaded Sun Niagara and heterogeneous STI Cell. We present several optimization strategies especially effective for the multicore environment, and demonstrate significant performance improvements compared to existing state-of-the-art serial and parallel SpMV implementations. Additionally, we present key insights into the architectural tradeoffs of leading multicore design strategies, in the context of demanding memory-bound numerical algorithms.
Date:
April 16, 2007
Creator:
Williams, S.; Oliker, L.; Vuduc, R.; Shalf, J.; Yelick, K. & Demmel, J.
Object Type:
Article
System:
The UNT Digital Library
Asymmetric Intramolecular Alkylation of Chiral Aromatic Imines via Catalytic C-H Bond Activation
The asymmetric intramolecular alkylation of chiral aromatic aldimines, in which differentially substituted alkenes are tethered meta to the imine, was investigated. High enantioselectivities were obtained for imines prepared from aminoindane derivatives, which function as directing groups for the rhodium-catalyzed C-H bond activation. Initial demonstration of catalytic asymmetric intramolecular alkylation also was achieved by employing a sterically hindered achiral imine substrate and catalytic amounts of a chiral amine.
Date:
April 16, 2007
Creator:
Watzke, Anja; Wilson, Rebecca; O'Malley, Steven; Bergman, Robert & Ellman, Jonathan
Object Type:
Article
System:
The UNT Digital Library
Radiological Contingency Planning for the Mars Science Laboratory Launch
This paper describes the contingency planning for the launch of the Mars Science Laboratory scheduled for the 21-day window beginning on September 15, 2009. National Security Technologies, LLC (NSTec), based in Las Vegas, Nevada, will support the U.S. Department of Energy (DOE) in its role for managing the overall radiological contingency planning support effort. This paper will focus on new technologies that NSTec’s Remote Sensing Laboratory (RSL) is developing to enhance the overall response capability that would be required for a highly unlikely anomaly. This paper presents recent advances in collecting and collating data transmitted from deployed teams and sensors. RSL is responsible to prepare the contingency planning for a range of areas from monitoring and assessment, sample collection and control, contaminated material release criteria, data management, reporting, recording, and even communications. The tools RSL has available to support these efforts will be reported. The data platform RSL will provide shall also be compatible with integration of assets and field data acquired with other DOE, National Aeronautics and Space Administration, state, and local resources, personnel, and equipment. This paper also outlines the organizational structure for response elements in radiological contingency planning.
Date:
April 16, 2008
Creator:
Paul Guss, Robert Augdahl, Bill Nickels, Cassandra Zellers
Object Type:
Article
System:
The UNT Digital Library