The discovery that ultra-intense laser pulses (I > 10{sup 18} W/cm{sup 2}) can produce short pulse, high energy proton beams has renewed interest in the fundamental mechanisms that govern particle acceleration from laser-solid interactions. Experiments have shown that protons present as hydrocarbon contaminants on laser targets can be accelerated up to energies > 50 MeV. Different theoretical models that explain the observed results have been proposed. One model describes a front-surface acceleration mechanism based on the ponderomotive potential of the laser pulse. At high intensities (I > 10{sup 18} W/cm{sup 2}), the quiver energy of an electron oscillating in the electric field of the laser pulse exceeds the electron rest mass, requiring the consideration of relativistic effects. The relativistically correct ponderomotive potential is given by U{sub p} = ([1 + I{lambda}{sup 2}/1.3 x 10{sup 18}]{sup 1/2} - 1) m{sub o}c{sup 2}, where I{lambda}{sup 2} is the irradiance in W{micro}m{sup 2}/cm{sup 2} and m{sub o}c{sup 2} is the electron rest mass.At laser irradiance of I{lambda}{sup 2} {approx} 10{sup 20} W{micro}m{sup 2}/cm{sup 2}, the ponderomotive potential can be of order several MeV. A few recent experiments--discussed in Chapter 3 of this thesis--consider this ponderomotive potential sufficiently strong to accelerate protons from the …

Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.

A weekly student newspaper from the Rice University in Houston, Texas that includes campus news and commentaries along with advertising.

We investigate computationally two recent mathematical findings involving unusual behavior of solutions of the Young-Laplace capillary equation in cylindrical tubes of particular sections. The first concerns a configuration for which smoothing of the boundary curve at a sharp corner leads from existence to non-existence of a solution over the container section in zero gravity. The second describes a discontinuous behavior of relative rise height in nesting tubes placed vertically in an infinite reservoir. The numerical results support and quantify the mathematical predictions.

Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.

Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.

This report discusses policy and legislation regarding fish and marine mammals. These animals are important resources in open ocean and nearshore coastal areas. Commercial and sport fishing are jointly managed by the federal government and individual states. Many laws and regulations guide the management of these resources by federal agencies.

Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.

Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.

Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.

Big computers are icons: symbols of the culture, and of the larger computing infrastructure that exists at Lawrence Livermore. Through the collective effort of Laboratory personnel, they enable scientific discovery and engineering development on an unprecedented scale. For more than three decades, the Computation Directorate has supplied the big computers that enable the science necessary for Laboratory missions and programs. Livermore supercomputing is uniquely mission driven. The high-fidelity weapon simulation capabilities essential to the Stockpile Stewardship Program compel major advances in weapons codes and science, compute power, and computational infrastructure. Computation's activities align with this vital mission of the Department of Energy. Increasingly, non-weapons Laboratory programs also rely on computer simulation. World-class achievements have been accomplished by LLNL specialists working in multi-disciplinary research and development teams. In these teams, Computation personnel employ a wide array of skills, from desktop support expertise, to complex applications development, to advanced research. Computation's skilled professionals make the Directorate the success that it has become. These individuals know the importance of the work they do and the many ways it contributes to Laboratory missions. They make appropriate and timely decisions that move the entire organization forward. They make Computation a leader in helping LLNL achieve …

We present a proposal for lowering the overhead of interface contract checking for science and engineering applications. Run-time enforcement of assertions is a well-known technique for improving the quality of software; however, the performance penalty is often too high for their retention during deployment, especially for long-running applications that depend upon iterative operations. With an efficient adaptive approach the benefits of run-time checking can continue to accrue with minimal overhead. Examples from scientific software interfaces being developed in the high performance computing research community will be used to measure the efficiency and effectiveness of this approach.

The sensitivity of the yield strength of a 70 ksi HSLA steel to changes in processing variables was investigated using a laboratory hot-rolling mill. Along with a detailed examination of the hot-rolled microstructures, auxiliary experiments were conducted to determine how the decomposition of the austenite phase and the occurrence of ultra-fine precipitate formation could account for the yield strength variability. A set of guidelines was recommended for the reduction of the yield strength variability.

The National Museum of the Pacific War presents an interview with Richard Fabian. Fabian joined the Navy in November of 1943. He completed schooling in Engineering, Diesel and Grey Marine Engines. Beginning November of 1944, Fabian served as Fireman First-Class aboard USS LSM-96. From 28 March to 30 June 1945, they participated in the Battle of Okinawa. After the war ended, they traveled to China and participated with the occupation forces. In December, Fabian was transferred to USS LSM-285 and remained in China through January of 1946. He returned to the US and was discharged in May.

The National Museum of the Pacific War presents an interview with Richard Fabian. Fabian joined the Navy in November of 1943. He completed schooling in Engineering, Diesel and Grey Marine Engines. Beginning November of 1944, Fabian served as Fireman First-Class aboard USS LSM-96. From 28 March to 30 June 1945, they participated in the Battle of Okinawa. After the war ended, they traveled to China and participated with the occupation forces. In December, Fabian was transferred to USS LSM-285 and remained in China through January of 1946. He returned to the US and was discharged in May.

Aluminum can promote formation or dissolution of networks in hydroxide solid solutions. When present in large amounts it will act as a network former increasing both the viscosity and the surface tension of melts. This translates into poor free flow properties that affect pour rate of glass production in the Defense Waste Processing Facility (DWPF). To mitigate this situation, DWPF operations limit the amount of aluminum contained in sludge. This study investigated the leaching of aluminum compounds from archived sludge samples. The conclusions found boehmite present as the predominant aluminum compound in sludge from two tanks. We did not identify an aluminum compound in sludge from the third tank. We did not detect any amorphous aluminum hydroxide in the samples. The amount of goethite measured 4.2 percentage weight while hematite measured 3.7 percentage weight in Tank 11H sludge. The recommended recipe for removing gibbsite in sludge proved inefficient for digesting boehmite, removing less than 50 per cent of the compound within 48 hours. The recipe did remove boehmite when the test ran for 10 days (i.e., 7 more days than the recommended baseline leaching period). Additions of fluoride and phosphate to Tank 12H archived sludge did not improve the aluminum …

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Semiweekly newspaper from Sealy, Texas that includes local, state, and national news along with advertising.

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Medicaid is a joint federal-state entitlement program that pays for medical services on behalf of certain groups of low-income persons. It is the third largest social program in the federal budget, exceeded only by Social Security and Medicare and is typically the second largest spending item for states. This report discusses prescription drug policies under the program.

In 1994, 34 Western Hemisphere nations met at the first Summit of the Americas, envisioning a plan for a Free Trade Area of the Americas (FTAA) by January 2005. Nine years later, the third draft text of the agreement was presented at the Miami trade ministerial held November 20-21, 2003. Deep differences remain unresolved, however, and, as reflected in the Ministerial Declaration, have taken the FTAA in a new direction. It calls for a two-tier framework comprising a set of “common rights and obligations” for all countries, augmented by voluntary plurilateral arrangements with country benefits related to commitments. A follow-up meeting in Puebla, Mexico was unable to clarify the details of this arrangement and negotiations will continue in late April 2004, when it is hoped that specific commitments will be defined. This report provides background and analysis for Congress on the proposed FTAA and will be updated.

Much evidence has been presented in favor of and against the existence of two distinct populations of quasars, radio-loud and radio-quiet. The SDSS differs from earlier optically selected quasar surveys in the large number of quasars and the targeting of FIRST radio source counterparts as quasar candidates. This allows a qualitatively different approach of constructing a series of samples at different redshifts which are volume-limited with respect to both radio and optical luminosity. This technique avoids any biases from the strong evolution of quasar counts with redshift and potential redshift-dependent selection effects. We find that optical and radio luminosities of quasars detected in both SDSS and FIRST are not well correlated within each redshift shell, although the fraction of radio detections among optically selected quasars remains roughly constant at 10% for z {le} 3.2. The distribution in the luminosity-luminosity plane does not appear to be strongly bimodal. The optical luminosity function is marginally flatter at higher radio luminosities.

Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.

Newspaper article about the Design Industries Foundation Fighting AIDS charitable runway show.