This report covers the initial year`s effort in the development of an Operational Life Model (OLM) for the SP-100 Space Reactor Power System. The initial step undertaken in developing the OLM was to review all available documentation from GE on their plans for the OLM and on the degradation and failure mechanisms envisioned for the SP-100. In addition, the DEGRA code developed at JPL, which modelled the degradation of the General Purpose Heat Source based Radioisotope Thermoelectric Generator (GPHS-RTG), was reviewed. Based on the review of the degradation and failure mechanisms, a list of the most pertinent degradation effects along with their key degradation mechanisms was compiled. This was done as a way of separating the mechanisms from the effects and allowing all of the effects to be incorporated into the OLM. The emphasis was on parameters which will tend to change performance as a function of time and not on those that are simply failures without any prior degradation.

We have implemented a 2D electrostastic plasma particle in cell (PIC) simulation code on the Caltech/JPL Mark IIIfp Hypercube. The code simulates plasma effects by evolving in time the trajectories of thousands to millions of charged particles subject to their self-consistent fields. Each particle`s position and velocity is advanced in time using a leap frog method for integrating Newton`s equations of motion in electric and magnetic fields. The electric field due to these moving charged particles is calculated on a spatial grid at each time by solving Poisson`s equation in Fourier space. These two tasks represent the largest part of the computation. To obtain efficient operation on a distributed memory parallel computer, we are using the General Concurrent PIC (GCPIC) algorithm previously developed for a 1D parallel PIC code.

Technical report that analyzes Texas rural land sales in 1989 to look at the patterns of land prices.

Newsletter of the Gulf Coast Waste Disposal Authority discussing news and updates related to the organization's meetings and activities, changes to regulations, and other relevant information.

Dynamic load balancing has been implemented in a concurrent one-dimensional electromagnetic plasma particle-in-cell (PIC) simulation code using a method which adds very little overhead to the parallel code. In PIC codes, the orbits of many interacting plasma electrons and ions are followed as an initial value problem as the particles move in electromagnetic fields calculated self-consistently from the particle motions. The code was implemented using the GCPIC algorithm in which the particles are divided among processors by partitioning the spatial domain of the simulation. The problem is load-balanced by partitioning the spatial domain so that each partition has approximately the same number of particles. During the simulation, the partitions are dynamically recreated as the spatial distribution of the particles changes in order to maintain processor load balance.

Compilation of hydrologic data for the Edwards Aquifer, such as groundwater recharge and discharge, water levels, water quality, maps of the San Antonio and Edwards Aquifer area, and data.

The objective of this work is to investigate, in the laboratory, the parameters associated with a chemically assisted in situ recovery procedure, using hydrogen chloride (HCI), carbon dioxide (CO{sub 2}), and steam (H{sub 2}O), to obtain-data useful to develop a process more economic than existing processes and to report all findings. The technical progress of the project is reported. The progress of the project is that experiment preparations are underway. Reactor design, process design, and experiment design have been completed. The laboratory to be used has required extensive clean-up, and is nearly ready. Safety considerations are underway. Finally, an initial literature search has revealed some important aspects that need to be considered.

Compilation of monthly reports from departments in the city of San Antonio, Texas providing statistics, project updates, and other information about services and activities.

Newsletter of the Center for Education and Research in Free Enterprise including analyses, essays, news, and other writing about politics and economics, as well as information about the activities of the Center.

Monthly report of the Texas A & M University Real Estate Center on statistics, recent news, and developments related to real estate.

Newsletter issued by the Texas Council on Vocational Education discussing news, events, and other relevant information related to technical and vocational education for adults in Texas.

Monthly compilation of estimated statistics listed by Texas county for civilian labor force (C.L.F.), employment, unemployment, and overall rate.

Annual report of the Texas Judicial System (the Texas Judicial Council and the Office of Court Administration) describing judicial branch operations, reports and developments, summaries and analyses of court activities, and providing a directory of judges and clerks for the 1990 fiscal year.

Newsletter describing the work the Texas Low-Level Radioactive Waste Disposal Authority and other topics related to radioactive waste for the public.

Newsletter describing the work the Texas Low-Level Radioactive Waste Disposal Authority and other topics related to radioactive waste for the public.

Bimonthly newsletter of the Texas Planning Council for Developmental Disabilities including information about the Council as well as news, events, and other relevant information.

Newsletter of the Texas Rehabilitation Commission discussing information about the Commission as well as news, events, and other relevant information.

Periodic newsletter discussing information related to student drop-out rates, relevant legislative issues, and prevention programs. This issue focuses on mentoring and how it can improve student success.

Periodic newsletter discussing information related to legislation, state finance, and other topics related to Texas government. This issue focuses on higher education in Texas, with a particular focus on the success of community colleges.

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Jim Mattox, regarding a legal question submitted for clarification: Whether a prosecutor may use drug seizure funds to pay bonuses or increases salaries without approval of the commissioners court (RQ-2078)

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Jim Mattox, regarding a legal question submitted for clarification: Whether the awarding of a contract precludes a county from making spot purchases from another supplier (RQ-2015)

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Jim Mattox, regarding a legal question submitted for clarification: Use of municipal revenue bonds to acquire a school building for lease to an independent school district (RQ-1876)

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Jim Mattox, regarding a legal question submitted for clarification: Imposition of fees on motor fuels under House Bill 504, Acts 1989, 71st Leg., ch. 1033, at 4156 (RQ-1904)

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Jim Mattox, regarding a legal question submitted for clarification: Whether a chamber of commerce is a "charitable organization" within the Charitable Immunity and Liability Act of 1987, Civil Practice and Remedies Code chapter 84 (RQ-2054)