Monthly report providing tabular statistical information about motor vehicle accidents in Texas during 1993, with data broken out by various criteria including number of persons, locations, types of accidents, time of day, and other factors.

Newsletter of the Texas Agricultural Extension Service discussing topics related to raising dairy cows, dairy production, and managing dairy operations.

The machine parameters (I[sub p], P[sub heat], R) required for ignition in ITER have generally been extrapolated from power-law regression fits to global [tau][sub E] measurements on existing tokamaks. There remain important choices to be made in the form of the scaling relation which have not yet been resolved by theory. In particular, power flow Q(r) through a magnetic flux surface should scale as Q(r) = Q[sub Bohm]F where F = F([rho]*,[beta],[nu]*,s,T[sub e]/T[sub i],...) is a function of local, nondimensional plasma parameters and Q[sub Bohm] [proportional to] [n[sub e]T[sub e][sup 2]a/eB]. Projections to ITER can be reduced to establishing the dependence of F on [rho]* = [rho][sub i]/a, because one can create plasmas in today's tokamaks which have similar values of the other nondimensional parameters. Two common scalings suggested by theory are Bohm (F independent of [rho]*) and gyroBohm (F [proportional to] [rho]*). Experiments have been carried out on TFTR to ascertain the dependence of F on [rho]*, [nu]*, and [beta] in L-mode plasmas, holding the other nondimensional parameters fixed. The observed variation of heat flow with [rho]* was observed to be better described by Bohm scaling than gyroBohm. Comparisons with the critical gradient temperature transport model, which is gyroBohm …

Effect of heat treatments and quenching with no change in oxygen content was studied for a polycrystalline sample of YBCO. Quenching the sample changes the specific heat and resistivity, showing that nonsuperconducting regions, some of which are not associated with Cu{sup 2+} moments, can be created in YBCO by heat treatment alone.

The ``Pen`` computer program has been developed for the analysis of penetration by shaped charge jets. In addition to standard methods for calculating the depth of penetration and the radius of the hole produced by a stretching jet, Pen contains new methods for treating the onset of particulation and for calculating the depth of penetration by a particulated jet. A Pen analysis was compared with a detailed calculation carried out with the LLNL Arbitrary Lagrangian-Eulerian code CALE. Pen was also applied to the analysis of two shaped charge jet penetration experiments. Pen reproduced the CALE hole profile and the experimental profiles when the effective strength in the steel targets was set to 1.2--1.3 times the yield strength. An experimental value of 1.44 {plus_minus} 0.19 GPa was obtained for the effective strength of hardened A4340 steel under jet impact.

Raman scattering is a coherent, inelastic, two-photon process, which shifts the frequency of an outgoing photon according to the vibrational structure of the irradiated species, thereby providing a unique fingerprint of the molecule. When involving an allowed electronic transition (resonance Raman), this scattering cross section can be enhanced by 10{sup 4} to 10{sup 6} and provides the basis for a viable technique that can monitor and detect trace quantities of hazardous wastes and toxic chemicals. Resonance Raman spectroscopy (RRS) possesses many of the ideal characteristics for monitoring and detecting of hazardous waste and toxic chemicals. Some of these traits are: (1) very high selectivity (chemical specific fingerprints); (2) independence from the excitation wavelength (ability to monitor in the solar blind region); (3) chemical mixture fingerprints are the sum of its individual components (no spectral cross-talk); (4) near independence of the Raman fingerprint to its physical state (very similar spectra for gas, liquid, solid and solutions -- either bulk or aerosols); and (5) insensitivity of the Raman signature to environmental conditions (no quenching). Data from a few chemicals will be presented which illustrate these features. In cases where background fluorescence accompanies the Raman signals, an effective frequency modulation technique has been …

We have used a bolometric technique to obtain accurate low temperature loss data for epitaxial thin films of Ba[sub 0.6]K[sub 0.4]BiO[sub 3] from 30 to 700 cm[sup [minus]1]. These films were grown on MgO and SrTiO[sub 3] substrates by MBE, off-axis sputtering and laser deposition techniques. All films show a strong absorption onset near the BCS tunneling gap of 3.5k[sub B]T[sub c]. We have analyzed these data using a Kramers-Kronig transformation and have corrected for finite film thickness effects. Results indicate that the absorption onset is consistent with a superconducting energy gap. Comparison is made with predictions based on strong coupling Eliashberg theory using [alpha][sup 2]F([omega]) spectra obtained from the literature. While we are able to fit the overall measured absorptivity, we are unable to fit the structure observed in our data.

Whole-arm obstacle avoidance is needed for a variety of robotic applications in the Environmental Restoration and Waste Management (ER&WM) Program. Typical industrial applications of robotics involve well-defined workspaces, allowing a predetermined knowledge of collision-free paths for manipulator motion. In the unstructured or poorly defined hazardous environments of the ER&WM Program, the potential for significant problems resulting from collisions between manipulators and the environment in which they are utilized is great. The conceptual design for a sensing system that will provide protection against such collisions is described herein. The whole-arm obstacle avoidance system consists of a set of sensor ``bracelets,`` which cover the surface area of the manipulator links to the maximum extent practical, and a host processor. The host processor accepts commands from the robot control system, controls the operation of the sensors, manipulates data received from the bracelets, and makes the data available to the manipulator control system. The bracelets consist of a subset of the sensors, associated sensor interface electronics, and a bracelet interface. Redundant communications links between the host processor and the bracelets are provided, allowing single-point failure protection. The system allows reporting of 8-bit data from up to 1000 sensors at a minimum of 50 Hz. …

Newsletter of the Texas Parks & Wildlife Conservation Passport program, discussing news and events, announcements related to the program, and other information of interest to park visitors.

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

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

This report summarizes the progress made during the period July 1, 1992 to April 30, 1993. The study of rotational structure at moderate spins in odd-odd nuclei (Section 1) has continued into the A [approximately] 80 region. Recent experimental data for the positive parity band in [sup 82]Y, including absolute BM1 and BE2 values, are rather well described with a prolatish'' triaxial shape and a [pi]g[sub 9/2] [direct product] [nu]g[sub 9/2] configuration. Little effect from a protonneutron interaction has been found so far. Current studies of odd mass nuclei (Section 2) are mainly focussing on low spin, low energy states in the A [approximately] 130 region as a probe to the evolving collectivity. These projects involve direct collaboration with experimental colleagues. Finally, a view of the microscopic foundation of particle-core coupling models approached from the equation of motion method is presented (Section 3).

A reduction of the relativistic Boltzmann-Langevin Equation (BLE), to a stochastic two-fluid model is presented, and transport coefficients associated with fluid dynamical variables are extracted. The approach is applied to investigate equilibration in a counter-streaming nuclear system.

This report summarizes the progress made during the period July 1, 1992 to April 30, 1993. The study of rotational structure at moderate spins in odd-odd nuclei (Section 1) has continued into the A {approximately} 80 region. Recent experimental data for the positive parity band in {sup 82}Y, including absolute BM1 and BE2 values, are rather well described with a ``prolatish`` triaxial shape and a {pi}g{sub 9/2} {direct_product} {nu}g{sub 9/2} configuration. Little effect from a protonneutron interaction has been found so far. Current studies of odd mass nuclei (Section 2) are mainly focussing on low spin, low energy states in the A {approximately} 130 region as a probe to the evolving collectivity. These projects involve direct collaboration with experimental colleagues. Finally, a view of the microscopic foundation of particle-core coupling models approached from the equation of motion method is presented (Section 3).

This report describes the environmental radiological monitoring program conducted by TVA in the vicinity of Browns Ferry Nuclear Plant (BFN) in 1992. The program includes the collection of samples from the environment and the determination of the concentrations of radioactive materials in the samples. Samples are taken from stations in the general area of the plant and from areas not influenced by plant operations. Station locations are selected after careful consideration of the weather patterns and projected radiation doses to the various areas around the plant. Material sampled includes air, water, milk, foods, vegetation, soil, fish, sediment, and direct radiation levels. Results from stations near the plant are compared with concentrations from control stations and with preoperational measurements to determine potential impacts of plant operations. Small amounts of Co-60 and Cs-134 were found in sediment samples downstream from the plant. This activity in stream sediment would result in no measurable increase over background in the dose to the general public.

This report describes the preoperational environmental radiological monitoring program conducted by TVA in the vicinity of the Watts Bar Nuclear Plant (WBN) in 1992. The program includes the collection of samples from the environment and the determination of the concentrations of radioactive materials in the samples. Samples are taken from stations in the general area of the plant and from areas that will not be influenced by plant operations. Material sampled includes air, water, milk, foods, vegetation, soil, fish, sediment, and direct radiation levels. During plant operations, results from stations near the plant will be compared with concentrations from control stations and with preoperational measurements to determine potential impacts to the public. Exposures calculated from environmental samples were contributed by naturally occurring radioactive materials, from materials commonly found in the environment as a result of atmospheric fallout, or from the operation of other nuclear facilities in the area. Since WBN has not operated, there has been no contribution of radioactivity from the plant to the environment.

Bimonthly newsletter of the Texas Department of State Health Services about topics related to the Women, Infants and Children (WIC) program. WIC is a nutritional program that provides education and counselling, nutritious foods, and help accessing health care to low-income women, infants, and children.