A letter report issued by the Government Accountability Office with an abstract that begins "The Department of Homeland Security (DHS) has made several changes to its criteria for including assets on the National Critical Infrastructure Prioritization Program (NCIPP) list of the nation's highest-priority infrastructure, but has not identified the impact of these changes or validated its approach. In 2009, DHS changed the criteria to make the list entirely consequence based--that is, based on the effect of an event on public health and safety, and economic, psychological, and government mission impacts. Subsequent changes introduced specialized criteria for some sectors and assets. For example, infrastructure that has received a specific, credible threat, but otherwise does not meet NCIPP criteria, may be included on the list. DHS's changes to the NCIPP criteria have changed the composition of the NCIPP list, which has had an impact on users of the list, such as the Federal Emergency Management Agency. However, DHS has not reviewed the impact of changes on users nor validated its approach to developing the list. While the change to an entirely consequence-based list created a common approach to identify infrastructure and align the program with applicable laws and the National Infrastructure Protection …

This report provides background information on the child tax credit. Specifically, this report provides an overview of the child tax credit under current law, as well as a legislative history of this tax benefit, which helps explain its purpose and current structure.

Several authorities govern the daily chamber work of the Senate: its standing rules, standing orders, unanimous consent agreements, precedent, and tradition. Because these authorities have different influence at certain times, no Senate session day is truly typical. This report discusses procedures and business that usually occur every session day, and refers to certain business items that may occur less frequently.

Methods and algorithms are developed to enable the accurate analysis of problems that exhibit interacting physical processes with uncertainties. These uncertainties can pertain either to each of the physical processes or to the manner in which they depend on each others. These problems are cast within a polynomial chaos framework and their solution then involves either solving a large system of algebraic equations or a high dimensional numerical quadrature. In both cases, the curse of dimensionality is manifested. Procedures are developed for the efficient evaluation of the resulting linear equations that advantage of the block sparse structure of these equations, resulting in a block recursive Schur complement construction. In addition, embedded quadratures are constructed that permit the evaluation of very high-dimensional integrals using low-dimensional quadratures adapted to particular quantities of interest. The low-dimensional integration is carried out in a transformed measure space in which the quantity of interest is low-dimensional. Finally, a procedure is also developed to discover a low-dimensional manifold, embedded in the initial high-dimensional one, in which scalar quantities of interest exist. This approach permits the functional expression of the reduced space in terms of the original space, thus permitting cross-scale sensitivity analysis.

The objectives of the confirmatory activities were to provide independent contractor field data reviews and to generate independent radiological data for use by the NRC in evaluating the adequacy and accuracy of the contractor�s procedures and FSS results. ORAU reviewed ABB CE�s decommissioning plan, final status survey plan, and the applicable soil DCGLs, which were developed based on an NRC-approved radiation dose assessment. The surveys include gamma surface scans, gamma direct measurements, and soil sampling.

With international efforts to limit anthropogenic carbon in the atmosphere, various CO{sub 2} sequestration methods have been studied by various facilities worldwide. Basalt rock in general has been referred to as potential host material for mineral carbonation by various authors, without much regard for compositional variations due to depositional environment, subsequent metamorphism, or hydrothermal alteration. Since mineral carbonation relies on the presence of certain magnesium, calcium, or iron silicates, it is necessary to study the texture, mineralogy, petrology, and geochemistry of specific basalts before implying potential for mineral carbonation. The development of a methodology for the characterization of basalts with respect to their susceptibility for mineral carbonation is proposed to be developed as part of this research. The methodology will be developed based on whole rock data, petrography and microprobe analyses for samples from the Caledonia Mine in Michigan, which is the site for a proposed small-scale demonstration project on mineral carbonation in basalt. Samples from the Keweenaw Peninsula will be used to determine general compositional trends using whole rock data and petrography. Basalts in the Keweenaw Peninsula have been subjected to zeolite and prehnite-pumpellyite facies metamorphism with concurrent native copper deposition. Alteration was likely due to the circulation of …

N/A

This report surveys existing law for legal issues that have arisen, or may arise in the future, on account of climate change and government responses thereto.

Summary of research carried out under Interagency Agreement DE-AI02-07ER64355 with the USDA Forest Service at the Howland Forest AmeriFlux site in central Maine. Includes a list of publications resulting in part or whole from this support.

None