Elimination of electromagnetic radiation in plasma simulation: the Darwin or magnetoinductive approximation (open access)

Elimination of electromagnetic radiation in plasma simulation: the Darwin or magnetoinductive approximation

For many astrophysical and most magnetic fusion applications, the purely electromagnetic modes generated by real as well as simulation ''plasma'' fluctuations are a source of high frequency radiation that is often irrelevant to the physics of interest. Unfortunately, a numerical CFL stability limit prevents either making c infinite or deltat large while using the usual explicit Maxwell's equations for the fields. A modification of Maxwell's equations, which provides implicitly the field components, circumvents this problem. The solution is to neglect retardation effects so that the electromagnetic propagation speed is effectively infinite. The purely electromagnetic modes in this limit evolve ''instantly'' to a time-asymptotic configuration about the macroscopic plasma configuration at each new time level. The Darwin or magnetoinductive approximation effectively provides infinite propagation speeds for purely electromagnetic modes by converting Maxwell's equations from hyperbolic to elliptic in character. In practice, this is accomplished by neglecting the solenoidal part of the displacement current. The elimination of the CFL time step constraint more than offsets the substantially more complicated field solution that is required. The details of a numerical implementation of this model will be presented. Numerical examples will be given and extentions of the Darwin field solution to other plasma models …
Date: February 21, 1985
Creator: Hewett, D.W.
Object Type: Article
System: The UNT Digital Library
Hydrogen absorption by YNi/sub 5/, LaPt/sub 5/, and ThNi/sub 5/ intermetallics (open access)

Hydrogen absorption by YNi/sub 5/, LaPt/sub 5/, and ThNi/sub 5/ intermetallics

The absorption of H by YNi/sub 5/, LaPt/sub 5/ and ThNi/sub 5/ at pressures above those reported in the literature were studied. These alloys were reported to absorb no significant H/sub 2/ at low pressures. (FS)
Date: February 21, 1980
Creator: Lakner, J. F. & Takeshita, T.
Object Type: Report
System: The UNT Digital Library
On-line monitoring of toxic materials in sewage at the Lawrence Livermore Laboratory (open access)

On-line monitoring of toxic materials in sewage at the Lawrence Livermore Laboratory

It is becoming increasingly important for industry to prevent releases of potentially toxic material to the environment. The Lawrence Livermore Laboratory has developed a system to monitor its sewage effluent on a continuous basis. A representative fraction of the total waste stream leaving the Plant is passed through a detection assembly consisting of an x-ray fluorescence unit which detects high levels of metals, sodium iodide crystal detectors that scan the sewage for the presence of elevated levels of radiation, and an industrial probe for pH monitoring. With the aid of a microprocessor, the data collected is reduced and analyzed to determine whether levels are approaching established environmental limits. Currently, if preset pH or radiation levels are exceeded, a sample of the suspect sewage is automatically collected for further analysis, and an alarm is sent to a station where personnel can be alerted to respond on a 24-hour basis. In the same manner, spectral data from the x-ray fluorescence unit will be routed through the 24-hour alarm system as soon as evaluation of the unit is complete. The design of the system and operational experience is discussed.
Date: February 21, 1980
Creator: Auyong, M.; Cate, J.L. Jr. & Rueppel, D.W.
Object Type: Article
System: The UNT Digital Library
International Impacts of Global Climate Change: Testimony to House Appropriations Subcommittee on Foreign Operations, Export Financing and Related Programs (open access)

International Impacts of Global Climate Change: Testimony to House Appropriations Subcommittee on Foreign Operations, Export Financing and Related Programs

International impacts of global climate change are those for which the important consequences arise because of national sovereignty. Such impacts could be of two types: (1) migrations across national borders of people, of resources (such as agricultural productivity, or surface water, or natural ecosystems), of effluents, or of patterns of commerce; and (2) changes to the way nations use and manage their resources, particularly fossil fuels and forests, as a consequence of international concern over the global climate. Actions by a few resource-dominant nations may affect the fate of all. These two types of international impacts raise complex equity issues because one nation may perceive itself as gaining at the expense of its neighbors, or it may perceive itself as a victim of the actions of others. 11 refs., 2 figs., 1 tab.
Date: February 21, 1989
Creator: Fulkerson, W.; Cushman, R.M.; Marland, G. & Rayner, S.
Object Type: Report
System: The UNT Digital Library
Diallyl Phthalate Prepolymer Characterization and Testing in Fiberglass Filled Molding Compounds (open access)

Diallyl Phthalate Prepolymer Characterization and Testing in Fiberglass Filled Molding Compounds

A program was undertaken to identify an acceptable alternative to Dapon 35, an o-diallyl phthalate (DAP) prepolymer no longer available. Three o-DAP prepolymers from the Osaka Soda Company and four laboratory-scale prepolymers from Bendix-Kansas city were characterized and evaluated in DAP-fiberglass molding compounds. Gel permeation chromatography results for the Osaka prepolymers showed all three to be very close to one another in molecular weights (mw) and mw distributions, but slightly lower in both than Dapon 35. They are also slightly higher in monomer content. All three processed readily into DAP-fiberglass molding compounds and passed required physical property tests. One Osaka prepolymer was compounded into both asbestos and Orlon-DAP compounds on a production scale. Both compounds have passed all certification tests. The Bendix prepolymers were deliberately varied in mw and mw distribution and higher in monomer content than Dapon 35. Processing difficulties were encountered with both the lowest and highest molecular weight compounds, and the lowest molecular weight compound failed a number of physical property tests. The two intermediate molecular weight compounds processed readily and passed property tests. Guidelines were established for acceptable o-DAP prepolymers: (1) weight average mw (relative to polystyrene standards): 30,000 to 150,000; (2) mw distribution: 3.0 to …
Date: February 21, 1983
Creator: Whitaker, Ruth B.; Schneider, Robert E. & Schumacher, Roy J.
Object Type: Report
System: The UNT Digital Library
Texas Register, Volume 11, Number 14, Pages 925-968, February 21, 1986 (open access)

Texas Register, Volume 11, Number 14, Pages 925-968, February 21, 1986

A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date: February 21, 1986
Creator: Texas. Secretary of State.
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History
Texas Register, Volume 9, Number 13, Pages 1067-1114, 02-21, 1984 (open access)

Texas Register, Volume 9, Number 13, Pages 1067-1114, 02-21, 1984

A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date: February 21, 1984
Creator: Texas. Secretary of State.
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History
Texas Attorney General Opinion: LO89-15 (open access)

Texas Attorney General Opinion: LO89-15

Letter opinion 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.
Date: February 21, 1989
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Texas Attorney General Opinion: LO89-16 (open access)

Texas Attorney General Opinion: LO89-16

Letter opinion 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 county is liabile for the fee of a law firm employed by the district attorney to represent the state in appeals from the 112th Judicial District Court of Reagan County.
Date: February 21, 1989
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Texas Attorney General Opinion: JM-428 (open access)

Texas Attorney General Opinion: JM-428

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: Expenditure of $27,650 allocated by the legislature for the benefit of the district attorney of the 31st and 223rd judicial districts.
Date: February 21, 1986
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Texas Attorney General Opinion: JM-429 (open access)

Texas Attorney General Opinion: JM-429

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 section 35.4041, Title 110B, V.T.C.S., requires a school district to pay state retirement contribution on all compensation paid by the district and creditable with the retirement system
Date: February 21, 1986
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Texas Attorney General Opinion: JM-430 (open access)

Texas Attorney General Opinion: JM-430

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 county departmental head may authorize a salary increase not approved by the commissioners court
Date: February 21, 1986
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Texas Attorney General Opinion: JM-431 (open access)

Texas Attorney General Opinion: JM-431

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 county commissioner may use his office to collect international aid for earthquake victims
Date: February 21, 1986
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Texas Attorney General Opinion: JM-432 (open access)

Texas Attorney General Opinion: JM-432

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 county may leave the right to cross county right-of-way to a pipeline company
Date: February 21, 1986
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Texas Attorney General Opinion: JM-433 (open access)

Texas Attorney General Opinion: JM-433

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: Validity of Senate Bill No. 454, Acts 1985, 69th Leg., which added three members to the Texas Adult Probation Commission
Date: February 21, 1986
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Texas Attorney General Opinion: JM-434 (open access)

Texas Attorney General Opinion: JM-434

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 county clerk is entitled to receive a fee in connection with administration of trust funds under article 2558a, section 4c(a), V.T.C.S.
Date: February 21, 1986
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Texas Attorney General Opinion: JM-435 (open access)

Texas Attorney General Opinion: JM-435

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: Responsibility for notification of defendants in criminal cases
Date: February 21, 1986
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Texas Attorney General Opinion: JM-436 (open access)

Texas Attorney General Opinion: JM-436

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: Computation of good time credits under article 5118a, V.T.C.S., and manual labor credits under article 43.10, Code of Criminal Procedure
Date: February 21, 1986
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Texas Attorney General Opinion: JM-437 (open access)

Texas Attorney General Opinion: JM-437

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 polygraph examiner is required to display his license at each location where he performs his services
Date: February 21, 1986
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Texas Attorney General Opinion: JM-438 (open access)

Texas Attorney General Opinion: JM-438

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: Validity of article 6166x-1, V.T.C.S., regarding good time credit
Date: February 21, 1986
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Texas Attorney General Opinion: JM-439 (open access)

Texas Attorney General Opinion: JM-439

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; Compliance with section 1A of article 6101h, V.T.C.S. and the dismissal of charges.
Date: February 21, 1986
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Texas Attorney General Opinion: JM-440 (open access)

Texas Attorney General Opinion: JM-440

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 commissioners court may set the office hours of the county auditor.
Date: February 21, 1986
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Texas Attorney General Opinion: JM-441 (open access)

Texas Attorney General Opinion: JM-441

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 administrative fees may be assessed by a justice of the peace or a municipal judge in traffic cases arising under article 6701d, section 143A, V.T.C.S.
Date: February 21, 1986
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Texas Attorney General Opinion: JM-442 (open access)

Texas Attorney General Opinion: JM-442

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 an elected mayor may receive a salary increase at any time during his term.
Date: February 21, 1986
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History