A letter report issued by the General Accounting Office with an abstract that begins "The Department of Housing and Urban Development (HUD) assists nearly 30,000 privately owned and operated multifamily properties to provide affordable housing for low and moderate income persons. HUD is responsible for ensuring that the owners of HUD-assisted properties provide housing that is decent, safe, sanitary, and in good repair. HUD began its Real Estate Assessment Center (REAC) in 1998 to inspect multifamily properties, and rate their condition. This report addresses whether: (1) HUD field offices are complying with the procedures HUD established to ensure that the physical deficiencies at these properties are corrected, (2) all physical deficiencies have been corrected at properties that HUD classified as repaired, and (3) HUD staff and property owners are meeting the Department's timeliness goals and requirements for addressing physical deficiencies. GAO found that HUD's field offices often did not follow the Department's procedures for ensuring that property owners are correcting all physical deficiencies. GAO visited properties that HUD said had been repaired and found that about half of them had not been corrected. Furthermore, HUD's staff and property owners are not meeting timeliness goals and requirements for addressing physical deficiencies."

Testimony issued by the General Accounting Office with an abstract that begins "The Government Paperwork Elimination Act (GPEA) requires that by 2003 federal agencies provide the public the option of submitting, maintaining, and disclosing required information--such as employment records, tax forms, and loan applications--electronically, instead of on paper. In October 2000, federal agencies submitted GPEA implementation plans to the Office of Management and Budget (OMB), which is responsible for executive branch oversight of GPEA. The plans submitted by the the Department of the Treasury and the Environmental Protection Agency (EPA) generally provide the kind of information that was specified in OMB's July 2000 guidance. However, the Department of Defense's (DOD) plan did not describe the department's overall GPEA strategy and, in some cases, the data provided for specific information collections may be inaccurate, incomplete or duplicative. Officials at all three agencies said that they faced challenges in complying with GPEA, particularly with regard to implementing adequate security assurances for sensitive electronic transactions and in planning for and implementing computer network infrastructures. Furthermore, OMB will be challenged in providing oversight of agency GPEA activities because the plans submitted by the agencies go not document key strategic actions, nor do they specify …

Testimony issued by the General Accounting Office with an abstract that begins "Research and Development (R&D) is vital to the long-term health of industry and the national economy. To join the ideas and resources of the research institutions--universities and colleges, federal laboratories, and nonprofit research centers--with the commercialization experience of small businesses, Congress authorized the Small Business Technology Transfer (STTR) Pilot Program in 1992 and reauthorized it in 1997. The STTR program is closely modeled on the Small Business Innovation Research (SBIR) Program. In preparation for the review and potential reauthorization of the STTR program, GAO obtained information from companies participating in the program. The companies reported that both they and the research institutions made considerable contributions to the R&D, such as knowledge or expertise essential to the project. They also created new partnerships that helped achieve technical objectives. However, the companies reported that they played a substantially greater role than the research institutions in originating the key ideas for the R&D. The companies further reported various results from the R&D, including the sales of products, processes, or services; the receipt of additional developmental funding beyond the original STTR funding; and patents granted. Finally, when asked for their view of …

Zircaloy cladding tubes strain in-situ during service life in the corrosive environment of a Pressurized Water Reactor for a variety of reasons. First, the tube undergoes stress free growth due to the preferential alignment of irradiation induced vacancy loops on basal planes. Positive strains develop in the textured tubes along prism orientations while negative strains develop along basal orientations (Reference (a)). Second, early in life, free standing tubes will often shrink by creep in the diametrical direction under the external pressure of the water environment, but potentially grow later in life in the diametrical direction once the expanding fuel pellet contacts the cladding inner wall (Reference (b)). Finally, the Zircaloy cladding absorbs hydrogen as a by product of the corrosion reaction (Reference (c)). Once above the solubility limit in Zircaloy, the hydride precipitates as zirconium hydride (References (c) through (j)). Both hydrogen in solid solution and precipitated as Zirconium hydride cause a volume expansion of the Zircaloy metal (Reference (k)). Few studies are reported on that have investigated the influence that in-situ clad straining has on corrosion of Zircaloy. If Zircaloy corrosion rates are governed by diffusion of anions through a thin passivating boundary layer at the oxide-to-metal interface (References …

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, John Cornyn, regarding a legal question submitted for clarification; Whether an individual employed by a company that recieves all of its revenue from a contract with the State of Texas may be compensated as a director of a municipal utility district (RQ-0351-JC)

A simple, approximate analysis of the effect of differing cathode and anode areas on the measurement of cell performance on anode-supported solid oxide fuel cells, wherein the cathode area is smaller than the anode area, is presented. It is shown that the effect of cathode area on cathode polarization, on electrolyte contribution, and on anode resistance, as normalized on the basis of the cathode area, is negligible. There is a small but measurable effect on anode polarization, which results from concentration polarization. Effectively, it is the result of a greater amount of fuel transported to the anode/electrolyte interface in cases wherein the anode area is larger than the cathode area. Experiments were performed on cells made with differing cathode areas and geometries. Cathodic and anodic overpotentials measured using reference electrodes, and the measured ohmic area specific resistances by current interruption, were in good agreement with expectations based on the analysis presented. At 800 C, the maximum power density measured with a cathode area of {approx}1.1 cm{sup 2} was {approx}1.65 W/cm{sup 2} compared to {approx}1.45 W/cm{sup 2} for cathode area of {approx}2 cm{sup 2}, for anode thickness of {approx}1.3 mm, with hydrogen as the fuel and air as the oxidant. At …

SnadiOpt is a package that supports the use of the automatic differentiation package ADIFOR with the optimization package Snopt. Snopt is a general-purpose system for solving optimization problems with many variables and constraints. It minimizes a linear or nonlinear function subject to bounds on the variables and sparse linear or nonlinear constraints. It is suitable for large-scale linear and quadratic programming and for linearly constrained optimization, as well as for general nonlinear programs. The method used by Snopt requires the first derivatives of the objective and constraint functions to be available. The SnadiOpt package allows users to avoid the time-consuming and error-prone process of evaluating and coding these derivatives. Given Fortran code for evaluating only the values of the objective and constraints, SnadiOpt automatically generates the code for evaluating the derivatives and builds the relevant Snopt input files and sparse data structures.

In this paper, by systematically treating the integrals involved in the piezoelectric inclusion problem, explicit results were obtained for the piezoelectric Eshelby tensors for a spheroidal inclusion aligned along the axis of the anisotropy in a transversely isotropic piezoelectric material. This problem was first treated by Dunn and Wienecke (1996) using a Green's function approach, which closely follows Withers' approach (1989) for an ellipsoidal inclusion problem in a transversely isotropic elastic medium. The same problem was recently treated by Michelitsch and Levin (2000) also using a Green's function approach. In this paper, a different method was used to obtain the explicit results for the piezoelectric Eshelby tensors for a spheroidal inclusion. The method is a direct extension of a more unified approach, which has been recently developed by Mikata (2000), which is based on Deeg's results (1980) on a piezoelectric inclusion problem. The main advantage of this method is that it is more straightforward and simpler than Dunn and Wienecke (1996), or Michelitsch and Levin (2000), and the results are a little bit more explicit than their solutions. The key step of this paper is an analytical closed form evaluation of several integrals, which was made possible after a careful …

An integrated code system consisting of RELAP5-3D and a multiphase CFD program has been created through the use of a generic semi-implicit coupling algorithm. Unlike previous CFD coupling work, this coupling scheme is numerically stable provided the material Courant limit is not violated in RELAP5-3D or at the coupling locations. The basis for the coupling scheme and details regarding the unique features associated with the application of this technique to a four-field CFD program are presented. Finally, the results of a verification problem are presented. The coupled code system is shown to yield accurate and numerically stable results.

17th Edition of TOP500 List of World's Fastest Supercomputers Released MANNHEIM, GERMANY; KNOXVILLE, TENN.; BERKELEY, CALIF. In what has become a much-anticipated event in the world of high-performance computing, the 17th edition of the TOP500 list of the world's fastest supercomputers was released today (June 21). The latest edition of the twice-yearly ranking finds IBM as the leader in the field, with 40 percent in terms of installed systems and 43 percent in terms of total performance of all the installed systems. In second place in terms of installed systems is Sun Microsystems with 16 percent, while Cray Inc. retained second place in terms of performance (13 percent). SGI Inc. was third both with respect to systems with 63 (12.6 percent) and performance (10.2 percent).

The effort to define guidance for authentication of software for arms control and nuclear material transparency measurements draws on a variety of disciplines and has involved synthesizing established criteria and practices with newer methods. Challenges include the need to protect classified information that the software manipulates as well as deal with the rapid pace of innovation in the technology of nuclear material monitoring. The resulting guidance will shape the design of future systems and inform the process of authentication of instruments now being developed. This paper explores the technical issues underlying the guidance and presents its major tenets.

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Newsletter of the Texas Agricultural Extension Service discussing topics related to economic aspects of raising dairy cows, dairy production, and managing dairy operations.

The Very Large Hadron Collider (or Eloisatron) represents what may well be the final step on the energy frontier of accelerator-based high energy physics. While an extremely high luminosity proton collider at 100-200 TeV center of mass energy can probably be built in one step with LHC technology, that machine would cost more than what is presently politically acceptable. This talk summarizes the strategies of collider design including staged deployment, comparison with electron-positron colliders, opportunities for major innovation, and the technical challenges of reducing costs to manageable proportions. It also presents the priorities for relevant R and D for the next few years.

In partnership with the City of San Diego, the U.S. Department of Energy funded a study to determine the feasibility of developing up to a 1 MW Brightfield on a landfill.

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