The Terascale High-Fidelity Simulations of Turbulent Combustion (TSTC) project is a multi-university collaborative effort to develop a high-fidelity turbulent reacting flow simulation capability utilizing terascale, massively parallel computer technology. The main paradigm of the approach is direct numerical simulation (DNS) featuring the highest temporal and spatial accuracy, allowing quantitative observations of the fine-scale physics found in turbulent reacting flows as well as providing a useful tool for development of sub-models needed in device-level simulations. Under this component of the TSTC program the simulation code named S3D, developed and shared with coworkers at Sandia National Laboratories, has been enhanced with new numerical algorithms and physical models to provide predictive capabilities for turbulent liquid fuel spray dynamics. Major accomplishments include improved fundamental understanding of mixing and auto-ignition in multi-phase turbulent reactant mixtures and turbulent fuel injection spray jets.

IKNO (Innovation and KNOwledge) is a proposal for a multi-user facility based on an electron storage ring optimized for the generation of coherent synchrotron radiation (CSR) in the terahertz frequency range, and of broadband incoherent synchrotron radiation (SR) ranging from the IR to the VUV. IKNO can be operated in an ultra-stable CSR mode with photon flux in the terahertz frequency region up to nine orders of magnitude higher than in existing 3rd generation light sources. Simultaneously to the CSR operation, broadband incoherent SR up to VUV frequencies is available at the beamline ports. The main characteristics of the IKNO storage and its performance in terms of CSR and incoherent SR are described in this paper. The proposed location for the infrastructure facility is in Sardinia, Italy.

Little is known about the long-term impacts of metal contamination on the microbiota of anoxic lake sediments. In this study, we examined microbial biomass and metals (arsenic, cadmium, chromium, copper, iron, lead, manganese, and zinc) in the sediments of Lake DePue, a backwater lake located near a former zinc smelter. Sediment core samples were examined using two independent measures for microbial biomass (total microscopic counts and total phospholipid-phosphate concentrations), and for various fractions of each metal (pore water extracts, sequential extractions, and total extracts of all studied metals and zinc speciation by X-ray absorption fine structure (XAFS). Zinc concentrations were up to 1000 times higher than reported for sediments in the adjacent Illinois River, and ranged from 21,400 mg/kg near the source to 1,680 mg/kg near the river. However, solid metal fractions were not well correlated with pore water concentrations, and were not good predictors of biomass concentrations. Instead, biomass, which varied among sites by as much as two-times, was inversely correlated with concentrations of pore water zinc and arsenic as established by multiple linear regression. Monitoring of other parameters known to naturally influence biomass in sediments (e.g., organic carbon concentrations, nitrogen concentrations, pH, sediment texture, and macrophytes) revealed no …

The adsorption and dissociation of water on a Ru(0001) surface containing a small amount ({le} 3 %) of carbon impurities was studied by scanning tunneling microscopy (STM). Various surface species are formed depending on the temperature. These include molecular H{sub 2}O, H{sub 2}O-C complexes, H, O, OH and CH. Clusters of either pure H{sub 2}O or mixed H{sub 2}O-OH species are also formed. Each of these species produces a characteristic contrast in the STM images and can be identified by experiment and by ab initio total energy calculations coupled with STM image simulations. Manipulation of individual species via excitation of vibrational modes with the tunneling electrons has been used as supporting evidence.

This report discusses the AIDS issue in Africa and the Bush administration's call to increase U.S. international funding for AIDS.

Livestock industry groups, animal health officials, and the U.S. Department of Agriculture have been working to establish a nationwide identification system capable of quickly tracking animals from birth to slaughter, in order to combat a serious animal disease and/or to satisfy foreign market specifications. Some consumer groups are among those who believe animal identification also would be useful for food safety or retail labeling purposes. Some producers oppose new programs, fearing they will be costly and intrusive. In the 110th Congress as of 2007, one related bill (H.R. 1018) had been introduced; it would prohibit a mandatory program. Lawmakers could be asked to consider this or other measures on the topic, possibly as part of a 2007 farm bill.

The Central Asian states (Kazakhstan, Tajikistan, Turkmenistan, and Uzbekistan) face common security challenges from crime, corruption, terrorism, and faltering commitments to economic and democratic reforms. This report contains information on Central Asia's external security context, security problems and progress, border tensions, crime and corruption, economic and defense security, implications for U.S. interests, U.S. security assistance, and related issues and figures.

This report details the information related to Country-of-Origin labeling for foods.

This report provides a brief overview of debt-limit legislation within the congressional budget process.

Correspondence issued by the Government Accountability Office with an abstract that begins "The Office of Management and Budget (OMB) establishes for the Department of Defense (DOD) the price DOD will use for pricing crude oil when constructing its budget for upcoming fiscal years. DOD in turn uses OMB's price in establishing the standard price to be used for a barrel of fuel for budgeting purposes by DOD fuel customers such as the military services. Because of the volatility of world petroleum prices, the standard price for a barrel of fuel included in the President's annual budget request for DOD may be lower or higher than the actual price established by the world market at any point in time after DOD's budget request is submitted to the Congress. During the fiscal year, DOD pays for fuel at the actual market rate, which typically varies from the budgeted rate. As a result, if the actual price of crude oil increases above the price DOD charges its customers, more dollars are needed to pay for fuel than originally budgeted. If the actual price is lower than what DOD charges its customers, DOD has more dollars than needed. Additionally, if DOD responds to increases …

Correspondence issued by the Government Accountability Office with an abstract that begins "Since combat operations began in Iraq and Afghanistan, U.S. forces have been subjected to frequent and deadly attacks from insurgents using various weapons such as improvised explosive devices (IED), mortars, rocket launchers, and increasingly lethal ballistic threats. Since 2003, to provide protection from ballistic threats, U.S. Central Command (CENTCOM), which is responsible for operations in Iraq and Afghanistan and other areas, has required service members and Department of Defense (DOD) civilians in its area of operations to be issued the Interceptor Body Armor (IBA) system. Used by all U.S. military service members and DOD civilians in the area of operations, the IBA consists of an outer tactical vest with ballistic inserts or plates that cover the front, back, and sides. As the ballistic threat has evolved, ballistic requirements have also changed. The vest currently provides protection from 9mm rounds, while the inserts provide protection against 7.62mm armor-piercing rounds. Additional protection can also be provided for the shoulder, throat, and groin areas. Concerns also regarding the level of protection and amount of IBA needed to protect U.S. forces have occurred in recent years, prompted by a number of reports, …

This report provides information about the Recommendation of the 9/11 Commission and Related Issues for Detection of Explosives on Airline Passengers. The key issue for congress is balancing various costs of mandating passenger explosives trace detection.

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This report describes evaluation of collapse evolution for selected LLNL underground nuclear tests at the Nevada Test Site (NTS). The work is being done at the request of NSTec and supports the Department of Energy National Nuclear Security Association Nevada Site Office Borehole Management Program (BMP). The primary objective of this program is to close (plug) weapons program legacy boreholes that are deemed no longer useful. Safety decisions must be made before a crater area, or potential crater area, can be reentered for any work. Our statements on cavity collapse and crater formation are input into their safety decisions. The BMP is an on-going program to address hundreds of boreholes at the NTS. Each year NSTec establishes a list of holes to be addressed. They request the assistance of the Lawrence Livermore National Laboratory and Los Alamos National Laboratory Containment Programs to provide information related to the evolution of collapse history and make statements on completeness of collapse as relates to surface crater stability. These statements do not include the effects of erosion that may modify the collapse craters over time. They also do not address possible radiation dangers that may be present. Subject matter experts from the LLNL Containment …

This project involved a multi-faceted approach to the improvement of techniques used in Positron Emission Tomography (PET), from radiochemistry to image processing and data analysis. New methods for radiochemical syntheses were examined, new radiochemicals prepared for evaluation and eventual use in human PET studies, and new pre-clinical methods examined for validation of biochemical parameters in animal studies. The value of small animal PET imaging in measuring small changes of in vivo biochemistry was examined and directly compared to traditional tissue sampling techniques. In human imaging studies, the ability to perform single experimental sessions utilizing two overlapping injections of radiopharmaceuticals was tested, and it was shown that valid biochemical measures for both radiotracers can be obtained through careful pharmacokinetic modeling of the PET emission data. Finally, improvements in reconstruction algorithms for PET data from small animal PET scanners was realized and these have been implemented in commercial releases. Together, the project represented an integrated effort to improve and extend all basic science aspects of PET imaging at both the animal and human level.

Aquaculture — the farming of fish, shellfish, and other aquatic animals and plants in a controlled environment — is expanding rapidly abroad, with more modest advances in the United States. This report discusses the federal laws and regulations that guide the management of resources in open ocean and near-shore coastal areas.

This report provides an overview of the major exceptions to the First Amendment.

This report discusses the high prices of Gasoline and issues for the 110th Congress.

A letter report issued by the Government Accountability Office with an abstract that begins "U.S. government efforts to protect and enforce intellectual property rights are crucial to preventing billions of dollars in economic losses and for mitigating health and safety risks from trade in counterfeit and pirated goods. The Department of Homeland Security's Customs and Border Protection (CBP) leads intellectual property (IP) enforcement activity at the U.S. border. GAO was asked to (1) examine key aspects of CBP's process to carry out border enforcement, (2) analyze CBP's border enforcement outcomes during fiscal years 2001 to 2006, and (3) evaluate CBP's approach for improving border enforcement. GAO examined relevant documents, interviewed agency officials in Washington, D.C. and seven port locations, and analyzed CBP data on trade and IP seizure and penalty activity. This is the public version of a law enforcement sensitive report by the same title (GAO-07-350SU)."

This report discusses the International Space Station (ISS) and efforts to improve shuttles and space exploration after the Columbia failure in 2003. Efforts include new policy from President Bush and funding for National Aeronautics and Space Administration (NASA). Updated April 26, 2007.

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This report provides an overview of the issues in dynamic revenue estimating.

Testimony issued by the Government Accountability Office with an abstract that begins "The United States has a vital national interest in maritime security. The safety and economic security of the United States depend in substantial part upon the secure use of the world's waterways and ports. In an effort to further the progress made through the Maritime Transportation Security Act of 2002, the Security and Accountability for Every Port Act (SAFE Port Act) was passed and became effective in October 2006. This testimony, which is based on past GAO work, synthesizes the results of this work as it pertains to the following: (1) overall port security, (2) facility security at U.S. ports, (3) the international supply chain and cargo container security, and (4) customs revenue collection efforts."

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