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1,280 Matching Results

Start Over Access Open Access Year 1990 Month July Language English

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(open access)

[Letter Template from Sharon Warwick to TAEA Colleagues, July 15, 1990]

Photocopy of a letter template from Sharon Warwick, Chair of the Elementary Division of the Texas Art Education Association, to her colleagues. Warwick is seeking help to formulate new ideas and ways to put together a UIL Picture Memory Contest for the elementary students. Enclosed in the letter is a list that Warwick asks her colleagues to fill out with further suggestions and to send them back to her before the school year.

Date: July 15, 1990

Creator: Warwick, Sharon

Object Type: Letter

System: The UNT Digital Library

(open access)

Establishment and maintenance of a coal sample bank and data base

In this Project Status Report for 7/9/89--10/8/89, results of a comparative study of coal sample deterioration in several container types were presented. In April 1990, one year after the initial analyses, the set of analyses was repeated on the most important container types. The new results are included in Table 2. During the current reporting period a total of 42 data printouts were distributed. In addition, 7 special data requests were fulfilled by either search/sort and printout or creation of a data disk, resulting in distribution of limited information on 2083 samples. Several preliminary requests for Sample Bank and Data Base information and price quotations have also been handled.

Date: July 11, 1990

Creator: Davis, A.

Object Type: Report

System: The UNT Digital Library

(open access)

Vertical bridgman and gradient freeze growth of III-V compound semiconductors

Major improvements in the structural and electrical perfection of single crystals of III-V compound semiconductors have been achieved by using new vertical Bridgman-type and vertical gradient freeze techniques. A general review of experimental set-ups used for growth of large diameter crystals of GaP, InP and GaAs is presented. Crystal properties and characteristic features are discussed to illustrate advantages and disadvantages of the vertical Bridgman-type growth techniques. 22 refs., 5 figs.

Date: July 1, 1990

Creator: Bourret, E.D.

Object Type: Article

System: The UNT Digital Library

(open access)

Po-210 as long-term integrating radon indicator in the indoor environment

The general objective is to improve the knowledge about the transferring processes leading from airborne radon/radon daughters to embedded Po-210 in hard surfaces in the indoor environment. The specific goal of the research is to identify situations in which the surface activity of Po-210 can be used as a long-term indicator of lung cancer risk from past or future radon exposures.

Date: July 1, 1990

Creator: Samuelsson, C.

Object Type: Report

System: The UNT Digital Library

(open access)

Enhancing the use of coals by gas reburning-sorbent injection

The objective of this project is to evaluate and demonstrate a cost effective emission control technology for acid rain precursors, oxides of nitrogen (NO{sub x}) and sulfur (SO{sub x}), on two coal fired utility boilers in Illinois. The units selected are representative of pre-NSPS design practices: tangential and cyclone fired. Work on a third unit, wall fired, is on hold'' because of funding limitations. The specific objectives are to demonstrate reductions of 60 percent in NO{sub x} and 50 percent in SO{sub x} emissions, by a combination of two developed technologies, gas reburning (GR) and sorbent injection (SI). With GR, about 80{endash}85 percent of the coal fuel is fired in the primary combustion zone. The balance of the fuel is added downstream as natural gas to create a slightly fuel rich environment in which NO{sub x} is converted to N{sub 2}. The combustion process is completed by overfire air addition. SO{sub x} emissions are reduced by injecting dry sorbents (usually calcium based) into the upper furnace. The sorbents trap SO{sub x} as solid sulfates that are collected in the particulate control device.

Date: July 19, 1990

Creator: unknown

Object Type: Report

System: The UNT Digital Library

(open access)

Kesterson crisis: Sorting out the facts

The Kesterson Reservoir was planned as a regulating facility to control drainage water discharges into the San Joaquin-Scaramento River Delta from the San Luis Drain'' which was to dispose of salt-ladin agricultural water. Anticipated environmental impacts of the Kesterson operations focused almost exclusively on problems related to seepage and water-logging of nearby lands. Reuse of drainage water for wetlands focused on excessive salinity. Drainage water entered the reservoir in 1978. By 1983 elevated levels of selenium were found with selenium poisoning causing deformed embryos of water birds, adult bird mortality and their poor reproductive success. An estimated 9000 kg of selenium was delivered to Kesterson between 1981 to 1986. This paper details the chronology of the Kesterson crisis and environmental remediation. 20 refs., 1 fig. (BJN)

Date: July 1, 1990

Creator: Benson, S.M. (Lawrence Berkeley Lab., CA (United States)); Delamore, M. & Hoffman, S. (Bureau of Reclamation, Sacramento, CA (United States). Mid-Pacific Region)

Object Type: Article

System: The UNT Digital Library

(open access)

Advanced Neutron Sources: Plant Design Requirements

The Advanced Neutron Source (ANS) is a new, world class facility for research using hot, thermal, cold, and ultra-cold neutrons. At the heart of the facility is a 350-MW{sub th}, heavy water cooled and moderated reactor. The reactor is housed in a central reactor building, with supporting equipment located in an adjoining reactor support building. An array of cold neutron guides fans out into a large guide hall, housing about 30 neutron research stations. Office, laboratory, and shop facilities are included to provide a complete users facility. The ANS is scheduled to begin operation at the Oak Ridge National Laboratory at the end of the decade. This Plant Design Requirements document defines the plant-level requirements for the design, construction, and operation of the ANS. This document also defines and provides input to the individual System Design Description (SDD) documents. Together, this Plant Design Requirements document and the set of SDD documents will define and control the baseline configuration of the ANS.

Date: July 1, 1990

Creator: unknown

Object Type: Report

System: The UNT Digital Library

(open access)

The puzzles of surface science and recent attempts to explain them

Surfaces have several unique properties that remain unexplained on the atomic level. These include (1) the unique chemical activity of rough surfaces, (2) the breaking of chemical bonds in narrow temperature ranges; and (3) the role of co-adsorption and strongly adsorbed monolayers during catalysis and tribological change (friction, lubrication). The dynamic surface restructuring model and surface structure induced variations in local density of states that have been suggested to rationalize the surface behavior await experimental confirmation. 24 refs., 10 figs., 2 tabs.

Date: July 1, 1990

Creator: Somorjai, G.A.

Object Type: Article

System: The UNT Digital Library

(open access)

Physics Division Annual Review: April 1, 1989-March 31, 1990

Annual report of activities of the Argonne National Laboratory Physics Division, including research at ATLAS, medium-energy nuclear physics and weak interactions, theoretical nuclear physics, and atomic and molecular physics.

Date: July 1990

Creator: Argonne National Laboratory. Physics Division.

Object Type: Report

System: The UNT Digital Library

(open access)

Development of the LICADO coal cleaning process

Development of the liquid carbon dioxide process for the cleaning of coal was performed in batch, variable volume (semi-continuous), and continuous tests. Continuous operation at feed rates up to 4.5 kg/hr (10-lb/hr) was achieved with the Continuous System. Coals tested included Upper Freeport, Pittsburgh, Illinois No. 6, and Middle Kittanning seams. Results showed that the ash and pyrite rejections agreed closely with washability data for each coal at the particle size tested (-200 mesh). A 0.91 metric ton (1-ton) per hour Proof-of-Concept Plant was conceptually designed. A 181 metric ton (200 ton) per hour and a 45 metric ton (50 ton) per hour plant were sized sufficiently to estimate costs for economic analyses. The processing costs for the 181 metric ton (200 ton) per hour and 45 metric ton (50 ton) per hour were estimated to be $18.96 per metric ton ($17.20 per ton) and $11.47 per metric ton ($10.40 per ton), respectively for these size plants. The costs for the 45 metric ton per hour plant are lower because it is assumed to be a fines recovery plant which does not require a grinding circuit of complex waste handling system.

Date: July 31, 1990

Creator: unknown

Object Type: Report

System: The UNT Digital Library

(open access)

Fermilab Physics Department TVC chip

The Electronics Group in the Physics Department at Fermilab has designed and has had produced 20 prototypes of a full custom four channel time to voltage converter using the ES2 direct write 2 {mu}m CMOS process. The actual implementation of the design was performed under contract by ASIC designs Inc. of Naperville, Illinois. Each channel has two hit capability and one level of input buffering: that is, up to four voltages representing time internals can be stored from each input for later ADC conversion. The chip produces an edited list of hits and presents the appropriate analog value on its output for each digital value on its hit address lines. The next hit address and analog voltage in the event is presented in response to an external strobe. One current sum proportional to the number of inputs hit for each input buffer is also provided. The chip has been designed to be used on a fastbus TDC card developed here, but it is our belief that it could be adapted to many TDC applications. 2 refs., 8 figs.

Date: July 1, 1990

Creator: Hansen, S. & Cotta-Ramusino, A.

Object Type: Report

System: The UNT Digital Library

(open access)

Cylinder yard inspections and corrective actions

Inspection of valves on stored uranium hexafluoride (UF{sub 6}) cylinders was initiated at the three diffusion plant sites in Oak Ridge, Tennessee, Paducah, Kentucky, and Portsmouth, Ohio as the result of the discovery of valve defects and evidence of valve leaks at the Oak Ridge K-25 plant. The coordinated inspection culminated in the identification of additional factors related to long-term safe storage of UF{sub 6}, and plans for correction of such deficiencies are presently being developed and implemented. These corrective actions supplement existing programs aimed at assurance of safe storage as summarized in the report.

Date: July 31, 1990

Creator: Barlow, C.R. (Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States)); Ziehlke, K.T. (MJB Technical Associates (United States)) & Pryor, W.A. (PAI Corp., Oak Ridge, TN (United States))

Object Type: Report

System: The UNT Digital Library

(open access)

Confused Minds, Burdened Families: Finding Help for People With Alzheimer's and Other Dementias

This OTA report analyzes the problem of locating and arranging services for people with dementia, presents a framework for an effective system to connect them to appropriate services, and discusses congressional policy options for establishing such a system. One of the main policy issues is whether the system should serve people with dementia exclusively or serve people with other diseases and conditions as well.

Date: July 1990

Creator: United States. Congress. Office of Technology Assessment.

Object Type: Report

System: The UNT Digital Library

(open access)

Forest Service Planning: Setting Strategic Direction Under RPA

This report evaluates past RPA efforts, reviews the process used by the Forest Service in preparing the 1989 RPA Assessment and the Draft 1990 RPA Program, and identities options for improving RPA’s contribution to long-range planning and to policy and budget deliberations. The second OTA report on Forest Service planning will review national forest planning, and will examine the relationship between national planning under RPA and forest planning under NFMA.

Date: July 1990

Creator: United States. Congress. Office of Technology Assessment.

Object Type: Report

System: The UNT Digital Library

(open access)

Evaluating Defense Department Research

This paper discusses briefly (1) the purposes of research directed toward support of the defense science and technology base and (2) criteria for judging government-supported, military oriented research portfolios. It will not cover, except tangentially, research into science and technology directed to civilian uses or the more advanced development phase of military weapons and systems.

Date: July 1990

Creator: United States. Congress. Office of Technology Assessment.

Object Type: Report

System: The UNT Digital Library

(open access)

Genetic Witness: Forensic Uses of DNA Tests

OTA prepared this report with the assistance of a panel of advisors and reviewers selected for their expertise and diverse points of view on the issues covered by the assessment. These authorities were drawn from academia, industry, and professional societies, as well as Federal, State, and local agencies. They included members of the scientific, law enforcement, forensic, and legal communities. OTA gratefully acknowledges the contribution of each of these individuals; as with all OTA reports, responsibility for the content is OTA’s alone.

Date: July 1990

Creator: United States. Congress. Office of Technology Assessment.

Object Type: Report

System: The UNT Digital Library

(open access)

[Informational document: New Infromation on didanosine]

A note to physicians from the Division of Acquired Immunodeficiency Syndrome (AIDS) at the National Institute of Health requesting for doctors and clinics to refer HIV positive patients to didanosine (ddI) trials as promptly as possible.

Date: July 30, 1990

Creator: National Institutes of Health (U.S.)

Object Type: Text

System: The UNT Digital Library

(open access)

[Letter: City of Dallas to Dallas Tavern Guild]

Letter from City of Dallas to the Dallas Tavern Guild about a plaque for the organization's work on city parks and research about introduction of diseases into the park system.

Date: July 30, 1990

Creator: Dallas (Tex.)

Object Type: Letter

System: The UNT Digital Library