Newsletter focusing on pecan disease and pest control in Texas, including prevention, identification, treatment, and educational opportunities.

Quarterly newsletter of the Community Resource Coordination Groups of Texas discussing news and events, work of the CRCGs, and other information related to the coordination of medical and social services for juveniles who need specialized care.

We present results from searches for top quark production in p[bar p] collisions at the Tevatron collider based on an integrated luminosity of 7.5 pb[sup [minus]1] obtained during the 1992--1993 ran. The present results are confined to decay modes where both the top and anti-top quarks in the event decay semi-leptonically to the ee and e[mu] channels. A lower limit of 103 (99) GeV/c[sup 2] is obtained at 95% confidence level for the top quark mass from the absence of events consistent with standard model top quark decays with background subtraction (no background subtraction). We do however observe one event in the e[mu] channel which cannot be explained by the known backgrounds. While we make no claim that this event is due to top quark decay, it is not inconsistent with a top quark mass in the range 130--170 GeV/c[sup 2]

The goal of this research is to characterize the mechanism by which a protein encoded by mitochondrial genome of cms-T maize (URF13) interacts with a family of the compounds produced by certain fungi (T-toxins) to permeabilize biological membranes. The research carried out during the current funding period has focused on the structure of URF13, and the results support the validity of the three-helix model of URF13 and provide direct evidence for the oligomeric nature of at least some of the URF13 molecules in the membrane. In addition, the toxin binding studies have provided insight into the dynamic nature of the T-toxin:URF13 interaction and the extent to which Asp-39 is crucial to the interaction that leads to membrane pore formation. Additional knowledge of the structure of URF13 is needed if the nature of the interaction between URF13 and T-toxin to produce a hydrophilic pore within the membrane is to ultimately be understood.

The US Department of Energy (DOE) is sponsoring SUNRAYCE 93 to advance tile technology and use of photovoltaics and electric vehicles. Participants will use cars powered by photovoltaic modules and lead-acid storage batteries. This brochure, prepared for students and faculty participating in this race, outlines the health hazards presented by these electrical systems, and gives guidance on strategies for their safe usage. At the outset, it should be noted that working with photovoltaic systems and batteries requires electric vehicle drivers and technicians to have [open quotes]hands-on[close quotes] contact with the car on a daily basis. It is important that no one work near a photovoltaic energy system or battery, either in a vehicle or on the bench, unless they familiarize themselves with the components in use, and know and observe safe work practices including the safety precautions described in the manuals provided by the various equipment vendors and this document.

Newsletter of the Texas Department of Health discussing the news, activities, and events of the organization and other information related to health in Texas.

Newsletter of the Texas Department of Health discussing the news, activities, and events of the organization and other information related to health in Texas.

The FHP lattice gas model is extended to include a temperature variable in order to study thermohydrodynamics. The compressible Navier-Stokes equations are derived using a Chapman-Enskog expansion. Heat conduction and convention problems are investigated, including Benard convention. It is shown that the usual FHP rescaling procedure can be avoided by controlling the temperature. 20 refs., 12 figs.

PETC has implemented a number of advanced combustion research projects that will lead to the establishment of a broad, commercially acceptable engineering data base for the advancement of coal as the fuel of choice for boilers, furnaces, and process heaters. Vortec Corporation's Phase III development contract DE-AC22-91PC91161 for a Coal-Fired Combustion System for Industrial Process Heating Applications'' is project funded under the DOE/PETC advanced combustion program. This advanced combustion system research program is for the development of innovative coal-fired process heaters which can be used for high temperature melting, smelling and waste vitrification processes. The process heater concepts to be developed are based on advanced glass melting and ore smelting furnaces developed and patented by Vortec Corporation. The process heater systems to be developed have multiple use applications; however, the Phase III research effort is being focused on the development of a process heater system to be used for producing value added vitrified glass products from boiler/incinerator ashes and industrial wastes. The primary objective of the Phase III project is to develop and integrate all the system components, from fuel through total system controls, and then test the complete system in order to evaluate its potential marketability. During the current …

The ''Cold War'' was not fought only by soldiers but by scientists and engineers in Laboratories and plants located throughout the world. With the fall of the Berlin Wall, the ''Cold War'' was effectively over, but the weapons of nuclear war remained. Following signing of START 2 (Strategic Arms Reduction Treaty) in 1993, up to 100 tonnes of weapons usable plutonium is expected to be declared excess by the Super Powers. Steps must be taken to address the proliferation risks associated with this plutonium. Again the scientist and engineers, who were the ''Cold War'' warriors, are being asked to develop methods to disposition this plutonium such that it can never again be used for weapons. Will we burn the plutonium in reactors or immobilize the plutonium either in a glass or ceramic matrix? Interesting challenges face chemists and chemical engineers developing immobilization techniques to render the plutonium both environmentally benign, and proliferation resistant.

Featured in "Science to Support DOE Site Cleanup: The Pacific Northwest National Laboratory Environmental Science Program Awards"

AQUATECH Systems, a business unit of Allied-Signal Inc., proposes to demonstrate the technical viability and cost effectiveness of the SOXAL process a combined SO{sub x}/NO{sub x} control process on a 3 MW equivalent flue gas slip stream from Niagara Mohawk Power Corporation, Dunkirk Steam Station Boiler No. 4, a coal fired boiler. The SOXAL process combines 90+% sulfur dioxide removal from the flue gas using a sodium based scrubbing solution and regeneration of the spent scrubbing liquor using AQUATECH Systems` proprietary bipolar membrane technology. This regeneration step recovers a stream of sulfur dioxide suitable for subsequent processing to salable sulfur or sulfuric acid. Additionally 90+% control of NO{sub x} gases can be achieved in combination with conventional urea/methanol injection of NO{sub 2} gas into the duct. The SOXAL process is applicable to both utility and industrial scale boilers using either high or low sulfur coal. The SOXAL demonstration Program began September 10, 1991 and is approximately 22 months in duration.

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A method is described to increase the yield of Anti-Protons/cycle by about a factor of five, without building new storage rings. In this method, the full circumference of the Main Injector is filled and accelerated. Existing RF cavities are then used to perform ``snap coalescing`` which clumps the charge in azimuth to produce 28 large RF bunches {approximately}5ns long. These are then extracted and targeted in a single 11{mu}sec turn of the Main Injector. The resulting P-bars are injected into six turns of the Debuncher using a resonant kicker which injects every 21st RF bucket The result is that every 3rd RF bucket in the Debuncher is occupied. After an h=30 rotation in the Debuncher, ESME simulations indicate a final momentum spread of {plus_minus}0.25%. This is comparable to the current momentum spread after debunching. It is superior to the momentum spreads of {plus_minus}1.2% and {plus_minus}2% which would be produced by the Compressor Ring and Linear Debuncher.

This paper presents an analysis of the mean time between failures (MTBF) and availability history of the Varian VGT8140, 400 Watt, 140 GHz Gyrotron that was operated on the Microwave Tokamak Experiment (MTX) at the Lawrence Livermore National Laboratory (LLNL).

The requirements and design of a laser system to generate a sodium- layer beacon is presented. Early results of photometry and wavefront sensing are given.

The authors have implemented a particle-in-cell method on a 32 transputer computing network. The tests have shown that the performance of this system reaches 1/8 of the equivalent one for the code optimized for a CRAY Y-MP/2E. The system performance analysis shows that this network remains cost-effective until expanded approximately up to 100 transputers. This transputer equipment has provided an efficient computational tool for investigating a novel physical phenomenon -- a collisionless mechanism for separation of different elements in colliding plasma beams.

The objective of this program is the experimental study of interactions of low energy, highly charged ions with other atomic species. The Cornell superconducting solenoid, cryogenic electron beam ion source CEBIS designed and built in our laboratory is the major piece of apparatus used in these investigations. This progress report describes the work accomplished during the period April 16, 1994 and August 1, 1994. This includes both finished experiments and preparatory work for planned future experiments using the source. During this time, we have completed measurements of the angular distributions and energy gains in Ar{sup q+} (11{le}q{le}14) on Ar collisions at 72 qeV laboratory energy. In particular, energy gain spectra at different laboratory scattering angles were obtained for Ar({sup q-1}){sup +} projectiles, i.e. projectiles whose final charge state had decreased by one unit. The experimental technique used, and the method of analysis are described elsewhere. The raw spectra are similar to those observed for Ar{sup 8+} and Ar{sup l0+} on Ar at comparable energies, as well as those described in the last progress report for Ar{sup l2+} on Ar.

The goal of this research is to characterize the mechanism by which a protein encoded by mitochondrial genome of cms-T maize (URF13) interacts with a family of the compounds produced by certain fungi (T-toxins) to permeabilize biological membranes. The research carried out during the current funding period has focused on the structure of URF13, and the results support the validity of the three-helix model of URF13 and provide direct evidence for the oligomeric nature of at least some of the URF13 molecules in the membrane. In addition, the toxin binding studies have provided insight into the dynamic nature of the T-toxin:URF13 interaction and the extent to which Asp-39 is crucial to the interaction that leads to membrane pore formation. Additional knowledge of the structure of URF13 is needed if the nature of the interaction between URF13 and T-toxin to produce a hydrophilic pore within the membrane is to ultimately be understood.

Three methods for simplifying FAST Diagrams are described which can encourage its use in construction-type value studies and bridge the gap between Information and Creativity. ``Project-FAST,`` ``Dormant- FAST`` and ``Quick-FAST`` are explained by examples which illustrate how the problem-solving capabilities of Function Analysis can be derived even from shorthand versions of FAST.

Puncturing of aerosol cans is performed in the Waste Receiving and Processing Facility Module 1 (WRAP 1) process as a requirement of the waste disposal acceptance criteria for both transuranic (TRU) waste and low-level waste (LLW). These cans have contained such things as paints, lubricating oils, paint removers, insecticides, and cleaning supplies which were used in radioactive facilities. Due to Westinghouse Hanford Company (WHC) Fire Protection concerns of the baseline system`s fire/explosion proof characteristics, a study was undertaken to compare the baseline system`s design to commercially available puncturing devices. While the study found no areas which might indicate a risk of fire or explosion, WHC Fire Protection determined that the puncturing system must have a demonstrated record of safe operation. This could be obtained either by testing the baseline design by an independent laboratory, or by substituting a commercially available device. As a result of these efforts, the commercially available Aerosolv can puncturing device was chosen to replace the baseline design. Two concerns were raised with the system. Premature blinding of the coalescing/carbon filter, due to its proximity to the puncture and draining operation; and overpressurization of the collection bottle due to its small volume and by blinding of the …

On August 11 - 13,1999, Cheng Saw and I collected WAXS and SAXS data on Kel-F 800 and poly(chlorotrifluoroethane) (pCTFE) polymer samples using the Advanced Polymer Beamline at the National Synchrotron Light Source at Brookhaven National Laboratory. The purpose of these experiments was to attempt to gain insight into the structure of the polymer in both amorphous and crystalline states. Developing this understanding is important if we are to (1) adequately understand the changing per cent crystallinity aging signature seen in LX-17 and (2) to be able to appropriately prepare ''aged'' samples of LX-17. One of the key questions we hoped to answer concerns the origin of the fairly sharp WAXS peak seen at a correlation length of about 5.6 {angstrom}. It is known that the crystalline peaks of pCTFE and Kel-F 800 occur at this position, but they are superimposed on a much stronger amorphous peak at exactly the same position. I had previously suggested that the relatively sharp amorphous peak was due to a possible helical structure of the chain backbone. As will be described below, experiments to test this idea conclusively showed it not to be correct. In addition the preliminary results from molecular dynamics modeling studies …

Consider the free creeping viscous plane flow in a region, bounded by a simple smooth closed curve and driven solely by surface tension. The shape evolution may in principle, and often in practice, be described by a time-dependent mapping z = {Omega}({zeta},t) of the unit circle, conformal on {vert_bar}{zeta}{vert_bar} {le} 1. It is shown that the path lines of fluid elements at the surface are determined by a first-order ordinary differential equation involving {Omega}({zeta},t), together with an initial condition. Typically, this must be integrated numerically. Velocities are not needed. The analogous theory for maps from the half-plane Im {zeta} {ge} 0 is presented. Surface path lines of a collapsing elliptic hole, in two reference frames, are calculated.

This document identifies the essential and supporting engineering drawings for the Central Waste Complex (CWC). The purpose of the document is to describe the criteria used to identify and the plan for updating and maintaining their accuracy. This document supports Engineering Practices (EP) 1.3 and 2.2. This revision includes drawings that were not included in the original revision and updates our upgrade plans. Information presented describes the implementation plan of the essential drawing system. Because the accuracy of many of the essential and support drawings is in question, a major effort is required to upgrade them. Solid Waste Engineering Services is providing the design and drawing effort with technical input from the CWC Cognizant Engineer.