The performance of NIF target designs is simulated in three dimensions using the HYDRA multiphysics radiation hydrodynamics code. In simulations of a cylindrical NIF hohlraum that include an imploding capsule, the motion of the wall material inside the hohlraum shows a high degree of axisymmetry. Laser radiation is able to propagate through the entrance hole for the required duration of the pulse. Gross hohlraum energetics in the simulation mirror the results from an axisymmetric simulation. A simulation of a copper-doped beryllium ablator NIF capsule carried out over large solid angle resolved the full spectrum of the most dangerous modes that grow from surface roughness. Hydrodynamic instabilities evolve into the weakly nonlinear regime. There is no evidence of low mode jetting driven by nonlinear mode coupling.

The thermal-hydrologic (TH) and coupled process models describe the evolution of a potential geologic repository as heat is released from emplaced waste. The evolution (thermal, hydrologic, chemical, and mechanical) of the engineered barrier and geologic systems is heavily dependent on the heat released by the waste packages and how the heat is transferred from the emplaced wastes through the drifts and through the repository host rock. The essential elements of this process are extracted (or abstracted) from the process-level models that incorporate the basic energy and mass conservation principles and applied to the total system models used to describe the overall performance of the potential repository. The process of total system performance assessment (TSPA) abstraction is the following. First is a description of the parameter inputs used in the process-level models. A brief description is given hereof past inputs for the viability assessment (e.g., for TSPA-VA) and current inputs for the site recommendation (TSPA-SR). This is followed by a highlight of the process-level models from which the abstractions are made. These include descriptions of TH, thermal-hydrologic-chemical (THC), and thermal-mechanical (TM) processes used to describe the performance of individual waste packages and waste emplacement drifts as well as the repository as …

A letter report issued by the General Accounting Office with an abstract that begins "Data sharing among federal agencies that run federal benefit and loan programs is important for determining the eligibility of applicants and beneficiaries. A GAO symposium on data sharing highlighted various issues facing federal agencies in their efforts to prevent abuse of federal programs. Symposium speakers focused on the number of program dollars saved by interagency data exchanges. Agencies using computer matching have detected undisclosed income and welfare recipients who receive benefits from more than one state. Improved technologies offer agencies the opportunity to expand their data sharing efforts. Such technologies include computer systems that can communicate directly with other systems and computer networks that can obtain information directly from financial institutions. Symposium speakers agreed that applicants' privacy should be protected when personal information is shared among agencies, but they disagreed about the extent to which data sharing threatens it. Privacy laws and security-related technology provide individuals with some protection against the possible misuse of personal information, but symposium participants differed on whether these protections are adequate."

Jefferson Lab, Hampton University and the Riverside Regional Medical Center are collaborating in a clinical study employing a dual modality imaging system utilizing scintimammography and digital radiography. The purpose of the study is to obtain clinical data on the reliability of scintimammography in predicting the malignancy of suspected breast lesions with the ultimate goal to reduce the number of false positives associated with conventional x-ray mammography. The scintimammography gamma camera is a custom built mini gamma camera with an active area of 5.3 cm x 5.3 cm based on a 2x2 array of Hamamatsu R7600-C8 position sensitive photomultiplier tubes. The spatial resolution of the gamma camera at the collimator surface is <4 mm FWHM and the sensitivity is 4000 cps/mCi. Preliminary results are that of the six cases that indicated a lesion with high uptake of MiraLuma ({sup 99m}Tc-sestamibi) five were positive for cancer. Out of a total of 25 patients in the study, all cases negative for MiraLuma uptake were confirmed negative via the biopsy pathology. The scintimammography results indicate that the lesions become visible with the mini gamma camera within 3 minutes post injection of MiraLuma.

This article describes the design rationale, a C implementation, and conformance testing of a subset of the new Standard for the BLAS (Basic Linear Algebra Subroutines): Extended and Mixed Precision BLAS. Permitting higher internal precision and mixed input/output types and precisions allows us to implement some algorithms that are simpler, more accurate, and sometimes faster than possible without these features. The new BLAS are challenging to implement and test because there are many more subroutines than in the existing Standard, and because we must be able to assess whether a higher precision is used for internal computations than is used for either input or output variables. We have therefore developed an automated process of generating and systematically testing these routines. Our methodology is applicable to languages besides C. In particular, our algorithms used in the testing code will be valuable to all other BLAS implementors. Our extra precision routines achieve excellent performance--close to half of the machine peak Megaflop rate even for the Level 2 BLAS, when the data access is stride one.

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The purpose of this section of the welding manual is to: (1) Provide a general description of the major responsibilities of the organizations involved with welding. (2) Provide general guidance concerning the application of codes related to welding. This manual contains requirements for welding for all Fluor Hanford (FH) welding operators working on the W460 Project, in the Plutonium Finishing Plant (PFP) at the U. S. Department of Energy (DOE) Hanford facilities. These procedures and any additional requirements for these joining processes can be used by all FH welding operators that are qualified. The Welding Procedure Specifications (WPS) found in this document were established from Procedure Qualification Records (PQR) qualified by FH specifically for the W460 Project. PQRs are permanent records of the initial testing and qualification program and are used to backup, and support, the WPS. The identification numbers of the supporting PQR(s) are recorded on each WPS. All PQRs are permanently stored under the supervision of the Fluor Hanford Welding Engineer (FHWE). New PQRs and WPSs will continue to be developed as necessary. The qualification of welders, welding operators and welding procedures will be performed for FH under supervision and concurrent of the FHWE. All new welding procedures …

A letter report issued by the General Accounting Office with an abstract that begins "The Environmental Protection Agency (EPA) proposed several amendments to its 1993 Corrective Action Management Unit (CAMU) rule. The CAMU rule currently allows agencies to set aside part of their hazardous waste site to deposit wastes without triggering the requirements of the Recovery Conservation and Recovery Act (RCRA). EPA's action is in response to a lawsuit alleging that the CAMU rule would allow for the management of wastes in violation of RCRA's land disposal restrictions. The 1993 rule and recently proposed rules governing the treatment, storage, and disposal of hazardous waste onsite in CAMUs differ primarily in the requirements for waste treatment and facility design. According to EPA, the proposed rules will increase the time and the costs of site cleanups using CAMUs because it is less flexible than the 1993 rule and adds technical and process requirements. Several state representatives expressed concern that the proposed requirements could be applied to cleanups done under their programs, regardless of whether they were using CAMUs, thereby deterring the progress states have been making in cleaning up sites."

In this paper a two pronged approach is taken to investigating the energy required for ignition of inertial confinement fusion capsules. A series of one dimensional LASNEX simulations is performed to create a database of barely ignited capsules that span the parameter regime Of interest. This database is used to develop scaling laws for the ignition energy in terms of both the stagnated capsule parameters and the inflight capsule parameters, and explore the connection between these two parameter sets. The second part of this paper examines how much extra energy is required to overcome the effect of the inevitable surface imperfections that are amplified during the implosion process and can lead to capsule break up in flight or to mix of cold fuel into the hotspot, both of which can cause the capsule to fail to ignite. By means of an example, the optimization of a capsule with fixed adiibat, drive pressure, and absorbed energy is performed; the capsule that is maximally robust to these failure modes is found.

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Correspondence issued by the General Accounting Office with an abstract that begins "The Haitian Refugee Immigration Fairness Act of 1998 authorizes Haitian nationals and their dependents to apply to change their status to legal permanent residence. This report, the fourth done in response to the act, contains a breakdown on the numbers of Haitians who applied and the number who were approved as asylum applicants, parolees, children without parents, orphaned children, abandoned children, or as the eligible dependents of these applicants (i.e., spouses, children, and unmarried sons or daughters). The Immigration and Naturalization Service had received a total of 35,257 applications under the act and had approved 263 of these applications. The Executive Office for Immigration Review had 95 applications filed and had approved 65 of them."

Correspondence issued by the General Accounting Office with an abstract that begins "A cookie is a short string of text, not a program, that is sent from a web server to a web browser when the browser accesses a web page. GAO reviewed 65 federal web sites to determine: (1) which of the selected federal sites were using cookies, (2) the type of cookies used, and (3) whether the privacy policy disclosed that the site may or does use cookies."

This report summarizes work on the development of a process to produce LNG (liquefied methane) for heavy vehicle use from landfill gas (LFG) using Acrion's CO{sub 2} wash process for contaminant removal and CO{sub 2} recovery. Work was done in the following areas: (1) production of natural gas pipeline methane for liquefaction at an existing LNG facility, (2) production of LNG from sewage digester gas, (3) the use of mixed refrigerants for process cooling in the production of LNG, liquid CO{sub 2} and pipeline methane, (4) cost estimates for an LNG production facility at the Arden Landfill in Washington PA.

This report summarizes work on the development of a process to produce LNG (liquefied methane) for heavy vehicle use from landfill gas (LFG) using Acrion's CO{sub 2} wash process for contaminant removal and CO{sub 2} recovery.

A letter report issued by the General Accounting Office with an abstract that begins "Through the Government Performance and Results Act (GPRA), Congress has sought to improve federal management and instill a greater focus on results. Congress and the executive branch recognize, however, that performance improvements do not take place merely because a set of management requirements has been put in place. In 1997 and 2000, GAO surveyed agencies' progress towards establishing a focus on results. GAO found that progress has been uneven in building the organizational cultures to create and sustain a focus on results governmentwide. A significantly higher percentage of managers in 2000 than in 1997 reported that their agencies had provided, arranged, or paid for training that would help them accomplish two results-oriented management-related tasks: setting performance goals and implementing the requirements of GPRA. Overall, the survey results show that, in some keys areas, agencies may be losing ground in their efforts towards building organizational cultures that support a focus on results. In GAO's view, the Senate confirmation process must ensure that political nominees have the appropriate management and leadership skills needed to continue to transform federal agencies into high-performing organizations."

For many nuclei beyond the proton drip line in the Z>72, N>82 region, both proton and a emission are energetically allowed. In the case of some proton emitters, there are {alpha}-decay chains emanating from both parent and daughter nuclei. This means that if the mass excess of one member of an {alpha}-decay chain is known, then the mass excesses for all members of both chains can be obtained. In addition, proton separation energies may be derived for nuclei in the {alpha}-decay chain of the proton emitter. The method of time- and space-correlations also allows the identification of isomeric states in these nuclei. As an example, a large number of mass excesses and proton separation energies for ground and metastable states have been derived from Q{sub a} and Q{sub p} values obtained from the proton emitters {sup 165,166,167}Ir, {sup 171}Au, {sup 177}Tl, and their daughters.

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In this paper an optimization-based method of drift prevention is presented for learning control of underdetermined linear and weakly nonlinear time-varying dynamic systems. By defining a fictitious cost function and the associated model-based sub-optimality conditions, a new set of equations results, whose solution is unique, thus preventing large drifts from the initial input. Moreover, in the limiting case where the modeling error approaches zero, the input that the proposed method converges to is the unique feasible (zero error) input that minimizes the fictitious cost function, in the linear case, and locally minimizes it in the (weakly) nonlinear case. Otherwise, under mild restrictions on the modeling error, the method converges to a feasible sub-optimal input.

This study identifies the applicable requirements for procurement and installation of a coating intended for tank farm valve and pump pit interior surfaces. These requirements are intended to be incorporated into project specification documents and design media. This study also evaluates previously recommended coatings and identifies requirement-compliant coating products.

POLIDENT (POint LIbraries of Data from ENDF/B Tapes) is an AMPX module that accesses the resonance parameters from File 2 of an ENDF/B library and constructs the continuous-energy cross sections in the resonance energy region. The cross sections in the resonance range are subsequently combined with the File 3 background data to construct the cross-section representation over the complete energy range. POLIDENT has the capability to process all resonance reactions that are identified in File 2 of the ENDF/B library. In addition, the code has the capability to process the single- and multi-level Breit-Wigner, Reich-Moore and Adler-Adler resonance formalisms that are identified in File 2. POLIDENT uses a robust energy-mesh-generation scheme that determines the minimum, maximum and points of inflection in the cross-section function in the resolved-resonance region. Furthermore, POLIDENT processes all continuous-energy cross-section reactions that are identified in File 3 of the ENDF/B library and outputs all reactions in an ENDF/B TAB1 format that can be accessed by other AMPX modules.

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