In September 2010, media reports emerged about a new form of cyber attack that appeared to target Iran, although the actual target, if any, is unknown. This report discusses this cyber attack, a malicious software program known as Stuxnet, which infected computer systems that were used to control the functioning of a nuclear power plant. Once inside the system, Stuxnet had the ability to degrade or destroy the software on which it operated. Although early reports focused on the impact on facilities in Iran, researchers discovered that the program had spread throughout multiple countries worldwide.

A letter report issued by the Government Accountability Office with an abstract that begins "In the absence of underground nuclear weapons testing, the National Nuclear Security Administration (NNSA) relies on its supercomputing operations at its three weapons laboratories to simulate the effects of changes to current weapons systems, calculate the confidence of future untested systems, and ensure military requirements are met. GAO was requested to assess the extent to which (1) NNSA has implemented contingency and disaster recovery planning and testing for its classified supercomputing systems, (2) the laboratories are able to share supercomputing capacity for recovery operations, and (3) NNSA tracks the costs for contingency and disaster recovery planning for supercomputing assets. To do this work, GAO examined contingency and disaster recovery planning policies and activities, and analyzed classified supercomputing capabilities at the weapons laboratories, and NNSA budgetary data."

The Navy is procuring a new type of surface combatant called the Littoral Combat Ship (LCS). The Navy wants to procure a total of 55 LCSs. This report details the 2007 restructuring of the LCS program, as well as various financial information relating to the program. The issue for Congress is whether to approve, reject, or modify the Navy's plans for the LCS program. The LCS program raises potential oversight issues for Congress relating to various aspects of the program, all of which are explored within this report.

Free weekly newspaper that includes business and classified advertising.

Free weekly newspaper that includes business and classified advertising.

Weekly newspaper from Port Aransas, Texas on Mustang Island that includes local, state and national news along with extensive advertising.

Application materials submitted to the Texas Historical Commission requesting a historic marker for the Ludwig Doebbler House, in Fredericksburg, Texas. The materials include the inscription text of the marker, original application, narrative, floor plans, and photographs.

Weekly Jewish newspaper from Fort Worth, Texas that includes local, state and national news along with extensive advertising.

The American impeachment process places in the legislative branch the authority to remove the President, Vice President, and other federal civil officers in the executive and judicial branches upon a determination that such officers have engaged in treason, bribery, or other high crimes and misdemeanors. It is one of the checks and balances grounded in the American constitutional structure. This report summarizes impeachment proceedings in the 111th Congress, examines relevant constitutional provisions, and provides a brief historical overview.

This work is at a relatively early stage, however it has been demonstrated that we can reliably probe basic network architectures using the MQ-NMR technique. The initial results are in good agreement with what is known from standard network theory and will serve as a basis for the study of progressively increasing structural complexity in Siloxane network systems.

The Main Injector Particle Production Experiment at Fermilab uses particle beams of charged pions, kaons, proton and anti-proton with beam momenta of 5 to 90 GeV/c and thin targets spanning the periodic table from (liquid) hydrogen to uranium to measure particle production cross sections in a full acceptance spectrometer with charged particle identification for particles from 0.1 to 120 GeV/c using Time Projection Chamber, Time of Flight, multicell Cherenkov, and Ring Imaging Cherenkov detectors and Calorimeter for neutrons. Particle production using 120 GeV/c protons from Main Injector on the MINOS target was also measured. We describe the physics motivation to perform such cross section measurements and highlight the impact of hadronic interaction data on neutrino physics. Recent results on forward neutron cross sections and analysis of MINOS target data are also presented.

Three simulated waste solutions representing wastes from tanks SY-102 (high nitrate, modified to exceed guidance limits), AN-107, and AY-102 were supplied by PNNL. Out of the three solutions tested, both optical and electrochemical results show that carbon steel samples corroded much faster in SY-102 (high nitrate) than in the other two solutions with lower ratios of nitrate to nitrite. The effect of the surface preparation was not as strong as the effect of solution chemistry. In areas with pristine mill-scale surface, no corrosion occurred even in the SY-102 (high nitrate) solution, however, corrosion occurred in the areas where the mill-scale was damaged or flaked off due to machining. Localized corrosion in the form of pitting in the vapor space of tank walls is an ongoing challenge to overcome in maintaining the structural integrity of the liquid waste tanks at the Savannah River and Hanford Sites. It has been shown that the liquid waste condensate chemistry influences the amount of corrosion that occurs along the walls of the storage tanks. To minimize pitting corrosion, an effort is underway to gain an understanding of the pitting response in various simulated waste solutions. Electrochemical testing has been used as an accelerated tool in …

The liquid waste chemistry control program is designed to reduce the pitting corrosion occurrence on tank walls. The chemistry control program has been implemented, in part, by applying engineering judgment safety factors to experimental data. However, the simple application of a general safety factor can result in use of excessive corrosion inhibiting agents. The required use of excess corrosion inhibitors can be costly for tank maintenance, waste processing, and in future tank closure. It is proposed that a probability-based approach can be used to quantify the risk associated with the chemistry control program. This approach can lead to the application of tank-specific chemistry control programs reducing overall costs associated with overly conservative use of inhibitor. Furthermore, when using nitrite as an inhibitor, the current chemistry control program is based on a linear model of increased aggressive species requiring increased protective species. This linear model was primarily supported by experimental data obtained from dilute solutions with nitrate concentrations less than 0.6 M, but is used to produce the current chemistry control program up to 1.0 M nitrate. Therefore, in the nitrate space between 0.6 and 1.0 M, the current control limit is based on assumptions that the linear model developed from …

Progress in the last few decades has left neutrino physics with several vexing issues. Among them are the following questions: (1) Why are lepton mixing angles so different from those in the quark sector? (2) What is the most probable range of the reactor mixing angle? (3) Is the atmospheric mixing angle maximal? (4) What is the number of fermion generations? These are some of the issues that neutrino science hopes to study; this article will explore these questions as part of a more general scientific landscape, and will discuss the part MiniBooNE might play in this exploration. We discuss the current state of measurements taken by MiniBooNE, and emphasize the uniqueness of neutrino oscillations as an important probe into the 'Windows on the Universe.'

Parent map for Cass County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:21,000.

Parent map for Cass County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:21,000.

Parent map for Collin County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:7,000.

Parent map for Collin County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:7,000.

Parent map for Burleson County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:17,000.

Parent map for Chambers County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:18,000.

Parent map for Collin County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:7,000.

Parent map for Collin County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:7,000.

Parent map for Collin County, Texas showing the area of one geographic block for which the U.S. Census Bureau collected data. The plotted map scale is 1:7,000.

Inset map for Chambers County, Texas showing detail within a census block for which the U.S. Census Bureau collected data. The plotted map scale is 1:5,778.