A letter report issued by the General Accounting Office with an abstract that begins "The Social Security Administration (SSA) has had difficulty in conducting timely reviews of beneficiaries' cases to ensure they are still eligible for disability benefits. SSA has been taking steps to improve the cost-effectiveness of its review process. SSA has linked the review process to eligibility for a new benefit that provides return-to-work services. This report looks at SSA's ability to stay current with future reviews, identifies potential improvements to the review process, and assesses the review process--return-to-work link."

Testimony issued by the General Accounting Office with an abstract that begins "The Department of Defense (DOD) faces many risks in its use of globally networked computer systems to perform operational missions--such as identifying and tracking enemy targets--and daily management functions--such as paying soldiers and managing supplies. Weaknesses in these systems, if present, could give hackers and other unauthorized users the opportunity to modify, steal, inappropriately disclose, and destroy sensitive military data. GAO was asked, among other things, to discuss DOD's efforts to protect its information systems and networks from cyber attack, focusing on its reported progress in implementing statutory information security requirements."

A letter report issued by the General Accounting Office with an abstract that begins "The Federal Law Enforcement Training Center (FLETC) provides federal law enforcement training for 75 Partner Organizations (agencies) primarily at four domestic facilities located at Glynco, Ga; Artesia, N. Mex.; Charleston, S.C.; and Cheltenham, Md.. Given the post-terrorist attack security environment, coupled with the increased demand for training, concerns have been raised about FLETC's continued ability to meet this training demand. Because of these concerns, GAO was asked to issue a report on (1) how FLETC plans to meet the projected demand for training; (2) FLETC's ability to efficiently coordinate and schedule training activities; and (3) whether oversight and governance structures provide the guidance it needs to address its capacity and planning challenges."

Testimony issued by the General Accounting Office with an abstract that begins "In May 2003, the Office of Management and Budget (OMB) released a revised Circular A-76, which represents a comprehensive set of changes to the rules governing competitive sourcing--one of five governmentwide items in the President's Management Agenda. Determining whether to obtain services in-house or through commercial contracts is an important economic and strategic decision for agencies, and the use of Circular A-76 is expected to grow throughout the federal government. In the past, however, the A-76 process has been difficult to implement, and the impact on the morale of the federal workforce has been profound. Concerns in the public and private sectors were also raised about the timeliness and fairness of the process for public-private competitions. It was against this backdrop that the Congress enacted legislation mandating a study of the A-76 process, which was carried out by the Commercial Activities Panel, chaired by the Comptroller General of the United States. This testimony focuses on how the new Circular addresses the Panel's recommendations reported in April 2002, the challenges agencies may face in implementing the new Circular A-76, and the need for effective workforce practices to help ensure …

Testimony issued by the General Accounting Office with an abstract that begins "The Social Security Administration (SSA) has had difficulty in conducting timely reviews of beneficiaries' cases to ensure they are still eligible for disability benefits. SSA has been taking steps to improve the cost-effectiveness of its review process. SSA has linked the review process to eligibility for a new benefit that provides return-to-work services. This testimony looks at SSA's ability to stay current with future reviews, identifies potential improvements to the review process, and assesses the review process--return-to-work link."

Testimony issued by the General Accounting Office with an abstract that begins "Providing benefits to disabled individuals is one of the Social Security Administration's (SSA) most important service delivery obligations--touching the lives of about 10 million individuals. In recent years, however, providing this benefit in a timely and efficient manner has become an increasing challenge for the agency. This past January, in fact, GAO designated SSA's disability programs as highrisk. Following a prior unsuccessful attempt, the agency is now in the midst of a major initiative to automate its disability claims functions, taking advantage of technology to improve this service. Seeking immediate program improvements, SSA is using an accelerated approach--called AeDib--to develop an electronic disability claims processing system. At the request of the Subcommittee on Social Security, House Committee on Ways and Means, GAO is currently assessing the strategy that underlies SSA's latest initiative to develop the electronic disability system. For this testimony, GAO was asked to discuss its key observations to date regarding the AeDib initiative, including strategy, risks, and stakeholder involvement. GAO plans to discuss more fully the results of this continuing review in a subsequent report"

A letter report issued by the General Accounting Office with an abstract that begins "In fiscal year 2002, the Veterans Benefits Administration (VBA) paid about $22.4 billion in disability compensation to over 2.6 million veterans and their survivors and about $3.3 billion in pension benefits to about 581,000 veterans and their survivors. To ensure that VBA makes proper payments under these programs, we reviewed the effectiveness of VBA efforts to prevent payments to deceased veterans by matching its Compensation and Pension (C&P) Master Records database of current beneficiaries with the Social Security Administration's (SSA) Death Master File."

Concurrent resolution introduced by the Texas House of Representatives and Senate relating to recognizing October 24, 2003, as Presbyterian Children's Homes and Services Day in Texas.

Concurrent resolution introduced by the Texas House of Representatives and Senate relating to granting the legislature the permission to adjourn for more than three days during the period beginning on Thursday, July 10, 2003, and ending on Tuesday, July 15, 2003.

Concurrent resolution introduced by the Texas House of Representatives and Senate relating to congratulating Carly Bender on being crowned Preteen Miss Majorette of Texas and recognizing July 21-27, 2003, as National Baton Twirling Week.

Percutaneous vapor toxicity guidelines are provided for assessment and selection of chemical protective ensembles (CPEs) to be used by civilian and military first responders operating in a chemical warfare agent vapor environment. The agents evaluated include the G-series and VX nerve agents, the vesicant sulfur mustard (agent HD) and, to a lesser extent, the vesicant Lewisite (agent L). The focus of this evaluation is percutaneous vapor permeation of CPEs and the resulting skin absorption, as inhalation and ocular exposures are assumed to be largely eliminated through use of SCBA and full-face protective masks. Selection of appropriately protective CPE designs and materials incorporates a variety of test parameters to ensure operability, practicality, and adequacy. One aspect of adequacy assessment should be based on systems tests, which focus on effective protection of the most vulnerable body regions (e.g., the groin area), as identified in this analysis. The toxicity range of agent-specific cumulative exposures (Cts) derived in this analysis can be used as decision guidelines for CPE acceptance, in conjunction with weighting consideration towards more susceptible body regions. This toxicity range is bounded by the percutaneous vapor estimated minimal effect (EME{sub pv}) Ct (as the lower end) and the 1% population threshold effect …

Practical tokamak reactors will need to maintain high ion temperature and nD approximately equal to nT in the core for long durations. These conditions will necessitate low energy transport, low impurity concentrations, and high bootstrap current. Large extrapolations from present experiments are needed to predict performance. A number of approaches are being used for these extrapolations including: (1) dimensionless scaling arguments, (2) empirical scaling, and (3) physics-based simulations of anomalous transport.

A fast X-ray system based on a Micro Pattern Gas Detector has been used, for the first time, to investigate emission from the plasma core of the National Spherical Tokamak eXperiment (NSTX) at the Princeton Plasma Physics Laboratory. The results presented in this work demonstrate the capability of such a device to measure with a time resolution of the order of 1 ms the curvature and the elongation of the X-ray iso-emissivity contours, under various plasma conditions. Also, comparisons with the magnetic surface structure calculated by the EFIT code show good agreement between reconstructed flux surface and the soft X-ray emissions (SXR) for poloidal beta values up to 0.6. For greater values of beta, X-ray iso-emissivity contours become circular, while magnetic flux surface reconstructions yield elongation 1.5 < k < 2.2. The X-ray images have been acquired with a (statistical) signal to noise ratio (SNR) per pixel of about 30. Thanks to the direct and efficient X-ray conversion and its operation in a photon counting mode, this new diagnostic tool allows the routine investigation of the plasma core with a sampling rate of 1 kHz and extremely high SNR under all experimental conditions in NSTX.

Recent calculations by Quataert et al. (2002) found that the growth rates of the magnetorotational instability (MRI) in a collisionless plasma can differ significantly from those calculated using MHD. This can be important in hot accretion flows around compact objects. In this paper, we study the transition from the collisionless kinetic regime to the collisional MHD regime, mapping out the dependence of the MRI growth rate on collisionality. A kinetic closure scheme for a magnetized plasma is used that includes the effect of collisions via a BGK operator. The transition to MHD occurs as the mean free path becomes short compared to the parallel wavelength 2*/k(sub)||. In the weak magnetic field regime where the Alfven and MRI frequencies w are small compared to the sound wave frequency k(sub)||c(sub)0, the dynamics are still effectively collisionless even if omega << v, so long as the collision frequency v << k(sub)||c(sub)0; for an accretion flow this requires n less than or approximately equal to *(square root of b). The low collisionality regime not only modifies the MRI growth rate, but also introduces collisionless Landau or Barnes damping of long wavelength modes, which may be important for the nonlinear saturation of the MRI.

A new method was developed to determine both diameters and indices of refraction and hence the birefringence of cylindrical textile and industrial fibers and bundles by measuring intensity patterns of the scattered light over an interval of scattering angles. The measured intensity patterns are compared with theoretical predictions (Mie theory) to determine fiber diameter and index of refraction. It is shown that the method is simple and accurate and may be useful as an on-line, noncontact diagnostic tool in real time.

The objective of this project is to develop improved seismic event location techniques that can be used to generate more and better quality reference events using data from local and regional seismic networks. Their approach is to extend existing methods of multiple-event location with more general models of the errors affecting seismic arrival time data, including picking errors and errors in model-based travel-times (path corrections). Toward this end, they are integrating a grid-search based algorithm for multiple-event location (GMEL) with a new parameterization of travel-time corrections and new kriging method for estimating the correction parameters from observed travel-time residuals. Like several other multiple-event location algorithms, GMEL currently assumes event-independent path corrections and is thus restricted to small event clusters. The new parameterization assumes that travel-time corrections are a function of both the event and station location, and builds in source-receiver reciprocity and correlation between the corrections from proximate paths as constraints. The new kriging method simultaneously interpolates travel-time residuals from multiple stations and events to estimate the correction parameters as functions of position. They are currently developing the algorithmic extensions to GMEL needed to combine the new parameterization and kriging method with the simultaneous location of events. The result will …

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In this paper, the adaptive optics (AO) system at Keck Observatory is characterized. The AO system is described in detail. The physical parameters of the lenslets, CCD and deformable mirror, the calibration procedures and the signal processing algorithms are explained. Results of sky performance tests are presented: the AO system is shown to deliver images with an average Strehl ratio of up to 0.37 at 1.59 {micro}m using a bright guide star. An error budget that is consistent with the observed image quality is presented.

The growing processor/memory performance gap causes the performance of many codes to be limited by memory accesses. If known to exist in an application, strided memory accesses forming streams can be targeted by optimizations such as prefetching, relocation, remapping, and vector loads. Undetected, they can be a significant source of memory stalls in loops. Existing stream-detection mechanisms either require special hardware, which may not gather statistics for subsequent analysis, or are limited to compile-time detection of array accesses in loops. Formally, little treatment has been accorded to the subject; the concept of locality fails to capture the existence of streams in a program's memory accesses. The contributions of this paper are as follows. First, we define spatial regularity as a means to discuss the presence and effects of streams. Second, we develop measures to quantify spatial regularity, and we design and implement an on-line, parallel algorithm to detect streams - and hence regularity - in running applications. Third, we use examples from real codes and common benchmarks to illustrate how derived stream statistics can be used to guide the application of profile-driven optimizations. Overall, we demonstrate the benefits of our novel regularity metric as a low-cost instrument to detect potential …

Since its discovery in the 1960's the {sup 178m2}Hf isomer has garnered high attention from both the basic and applied communities in nuclear science. It's combination of high spin (16+), long half life (31 yrs), and high excitation energy (2.446 MeV) offer unique possibilities as an energy storage medium. Interest in the isomer was rekindled beginning in 1999 when a series of publications began to appear from a group (referred to here as the ''Texas collaboration'') primarily based at the University of Texas, Dallas [1]. They reported observations that some of the stored energy could be released (''triggered'') when the isomer was exposed to a fluence of photons in the energy range {approx}10 to {approx}60 keV. The implications of this observation are profound. Even though the claimed cross section for the process was {approx}7 orders of magnitude greater than would be predicted from the known systematics of photon absorption by nuclei in this mass range [2], such a highly efficient method for triggering the isomeric deexcitation immediately suggested applications utilizing the explosive or the controlled gradual energy release from a very compact source. The prospect of such applications has focused considerable interest on realizing the promise that is implicit in …

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Edge data from plasmas in the National Spherical Torus Experiment (NSTX) [S. Kaye et al., Fusion Technology 36 (1999) 16] have been compared to theories of transport suppression that have been used to develop a physics framework for low-confinement (L) to high-confinement (H) mode transitions. The NSTX data were obtained in low aspect ratio (R/a approximately equal to 1.3) discharges taken from a variety of discharge phases, including L-modes, L-H transitions, and H-modes with and without edge localized modes (ELMs). The comparisons show that the group of points taken just before the L-H mode transition are well mixed with the purely L-mode group to within the measurement uncertainties, indicating that changes in these parameters leading up to the transition are subtle. One of the theory parameters, alpha{sub MHD} = -R{sub q}{sup 2}dbeta{sub t/dr}, does show a clear threshold alpha{sub MHD} = 1 to 2 between the H-mode grouping of points and those remaining in the L-mode or taken just prior to the transition. Additionally, there is no evidence for an edge temperature threshold necessary for transitioning into the H-mode. NSTX data indicate further a possible connection between L-H transitions and non-ambipolar beam ion losses.

Over 160 acres of tree seedlings were planted during the last quarter. This quarter marked the beginning of the installation of new instrumentation and the inspection and calibration of previously installed recording devices. Sampling systems were initiated to quantify initial seedling success as well as height measurements. Nursery seedlings have been inoculated to produce mycorrhizal treated stock for 2004 spring plantings to determine the effects on carbon sequestration. All planting areas in western Kentucky have been sampled with the recording cone penetrometer and the nuclear density gauge to measure soil density.

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