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6,071 Matching Results

Start Over Access Open Access Month May Day 28th Language English

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Results: 1 - 24 of 6,071 next

(open access)

Combustible radioactive waste treatment by incineration and chemical digestion

A review is given of present and planned combustible radioactive waste treatment systems in the US. Advantages and disadvantages of various systems are considered. Design waste streams are discussed in relation to waste composition, radioactive contaminants by amount and type, and special operating problems caused by the waste.

Date: May 28, 1980

Creator: Stretz, L. A.; Crippen, M. D. & Allen, C. R.

Object Type: Article

System: The UNT Digital Library

$Broadband diffractive lens$ (open access)

Broadband diffractive lens

Significant progress has been made toward solving the century-old problem of chromatic aberrations in diffractive optics. Our approach exploits modern materials and microfabrication technology and is very different from the purely diffractive strategy,'' which is commonly employed and which results in multiple diffractive elements separated by a finite distance. We have developed a Fresnel zone plate lens comprised of a serial stack of patterned minus-filters which allows broadband radiation to be focused (or imaged) without longitudinal or transverse chromatic aberrations. 7 refs., 4 figs.

Date: May 28, 1991

Creator: Ceglio, N. M.; Hawryluk, A. M.; London, R. A.; Seppala, L. G. (Lawrence Livermore National Lab., CA (USA)) & Gaines, D. P. (Brigham Young Univ., Provo, UT (USA))

Object Type: Article

System: The UNT Digital Library

(open access)

Instrumentation for two-phase geothermal flow

None

Date: May 28, 1975

Creator: Calder, C. A.

Object Type: Report

System: The UNT Digital Library

(open access)

Data acquisition system for the HHIRF spin spectrometer

The Spin Spectrometer at the Holifield Heavy Ion Research Facility (HHIRF) is a multidetector ..gamma..-ray spectrometer consisting of 72 separate NaI detector elements closely packed in a 4..pi.. geometry. The basic apparatus was constructed at Washington University and has been installed and implemented at the HHIRF at Oak Ridge National Laboratory. The spectrometer was designed especially for the investigation of the mechanisms of heavy-ion induced nuclear reactions and of the structure of nuclei with high angular momentum. The data acquisition system is described. (WHK)

Date: May 28, 1981

Creator: Hensley, D.C.

Object Type: Article

System: The UNT Digital Library

(open access)

Studies of the Formation of Field Reversed Plasma by a Magnetized Co-Axial Plasma Gun

The gun injects axially into a drift tank followed by a magnetic mirror. For the experiments reported here, only the guide coils outside the vacuum vessel and solenoids on the plasma gun electrodes were used; the mirror coil was not energized. A stainless steel flux conserver is placed in the mirror throat to prevent the plasma from contacting the nonconducting vacuum wall in the region of the mirror. An axis encircling array of magnetic loop probes includes four diamagnetic loops and a loop which measures the azimuthally averaged outward pointing radial component of magnetic field. These loop probes are stainless steel jacketed and form a flux conserving boundary (at a radius = 30 cm) for plasma emitted from the gun. A five tip probe that can be positioned anywhere along the axis of the experiment is used to measure internal components of magnetic field.

Date: May 28, 1980

Creator: Turner, W. C.; Granneman, E. H. A.; Hartman, C. W.; Prono, D. S.; Taska, J. & Smith, A. C., Jr.

Object Type: Article

System: The UNT Digital Library

(open access)

Movable Genetic Elements: Detection of Changes in Maize DNA at the Shrunken Locus Due to the Intervention of Ds Elements

This report describes our initial attempts at the molecular characterization of a maize controlling element. We have prepared a cDNA probe and used it to detect changes at a locus where Ds elements are found. Evidence of their presence are indicated by changes in the restriction patterns, but there is as yet no information on the physical nature of the controlling elements nor on the kinds of rearrangements they cause.

Date: May 28, 1980

Creator: Burr, B. & Burr, F.A.

Object Type: Article

System: The UNT Digital Library

(open access)

Feasibility study: Application of RCM techniques for substation maintenance at the Bonneville Power Administration. [Reliability Centered Maintenance (RCM)]

This feasibility study examines reliability centered maintenance (RCM) as it applies to Bonneville Power Administrations (BPA) substation maintenance program. Reliability techniques are examined in evaluated. Existing BPA equipment maintenance procedures are documented. Equipment failure history is considered. Economic impacts are estimated. Various equipment instrumentation methods are reviewed. Based on this analysis a prototype system is proposed. The prototype will be implemented in two phases. Phase 1 is to be completed in 1992, it includes instrumenting one power transformer and one oil circuit breaker. Software development will focus on displaying data. Phase 2 is to be completed the following year. The remaining transformers and breakers will be instrumented during the second phase. Software development will focus on predictive maintenance techniques and maintenance decision support.

Date: May 28, 1992

Creator: Purucker, S. L.; Tonn, B. E.; Goeltz, R. T.; James, R. D.; Kercel, S.; Rizy, D. T. et al.

Object Type: Report

System: The UNT Digital Library

(open access)

Performance of two-phase nozzles for total flow geothermal impulse turbines

None

Date: May 28, 1975

Creator: Alger, T.W.

Object Type: Article

System: The UNT Digital Library

(open access)

Photogenerated carrier-induced reactions on uhv semiconductor surfaces

The objective for this experimental work was to examine the reaction mechanisms, half-collision dynamics, and other optically induced chemical effects, that are operable on a well characterized single-crystal semiconductor surface. Of particular interest were reactions induced by charge transfer from the semiconductor surface including hot carrier and thermalized carrier processes. The primary technique to measure the desorbed fragment translational energies was time-of-flight mass-spectroscopy, used in conjunction with a pulsed tunable laser source. The work was carried out in ultrahigh vacuum, thus other surface spectroscopies such as temperature-programmed desorption, (TPD), (LEED), etc. were used as needed. In the project, the photoreactions of several halogen-containing molecules on GaAs(110) surfaces have been investigated. The studies have made the first observations of several new photochemical processes on uhv prepared surfaces including intermolecular charge transfer; desorption by thermal-carrier-induced reactions (including the measurement of coverage-dependent changes in the translational energies of the desorbed products); interferometric oscillation of photoinduced reactions; and self-quenching of thermal carrier reactions on surfaces.

Date: May 28, 1992

Creator: Osgood, R.M. Jr.

Object Type: Report

System: The UNT Digital Library

(open access)

The Mangum Star. (Mangum, Okla. Terr.), Vol. 15, No. 47, Ed. 1 Thursday, May 28, 1903

Weekly newspaper from Mangum, Oklahoma that includes local, territorial, and national news along with advertising.

Date: May 28, 1903

Creator: Echols, R. C. & Townsend, G. B.

Object Type: Newspaper

System: The Gateway to Oklahoma History

(open access)

The Mangum Star. (Mangum, Okla.), Vol. 20, No. 48, Ed. 1 Thursday, May 28, 1908

Weekly newspaper from Mangum, Oklahoma that includes local, state, and national news along with advertising.

Date: May 28, 1908

Creator: Taylor, J. E.

Object Type: Newspaper

System: The Gateway to Oklahoma History

(open access)

The Oklahoma Democrat. (Altus, Okla.), Vol. 2, No. 10, Ed. 1 Thursday, May 28, 1908

Weekly newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.

Date: May 28, 1908

Creator: Williams, Bob & Ruthruff, C. E.

Object Type: Newspaper

System: The Gateway to Oklahoma History

(open access)

Oklahoma State Register. (Guthrie, Okla.), Vol. 12, No. 23, Ed. 1 Thursday, May 28, 1903

Weekly newspaper from Guthrie, Oklahoma Territory that includes local, territorial, and national news along with advertising.

Date: May 28, 1903

Creator: Golobie, John

Object Type: Newspaper

System: The Gateway to Oklahoma History

(open access)

The Oklahoma Democrat (Altus, Okla.), Vol. 7, No. 13, Ed. 1 Thursday, May 28, 1914

Weekly newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.

Date: May 28, 1914

Creator: unknown

Object Type: Newspaper

System: The Gateway to Oklahoma History

(open access)

The Logan County News. (Crescent, Okla.), Vol. 12, No. 29, Ed. 1 Friday, May 28, 1915

Weekly newspaper from Crescent, Oklahoma that includes local, state, and national news along with advertising.

Date: May 28, 1915

Creator: Frishman, Joseph

Object Type: Newspaper

System: The Gateway to Oklahoma History

(open access)

Guthrie Daily News. (Guthrie, Okla. Terr.), Vol. 5, No. 1497, Ed. 1 Monday, May 28, 1894

Daily newspaper from Guthrie, Oklahoma Territory that includes local, territorial, and national news along with advertising.

Date: May 28, 1894

Creator: Stevens, T.

Object Type: Newspaper

System: The Gateway to Oklahoma History

(open access)

The Greer County Democrat (Mangum, Okla.), Vol. 24, No. 37, Ed. 1 Thursday, May 28, 1914

Weekly newspaper from Mangum, Oklahoma that includes local, state, and national news along with advertising.

Date: May 28, 1914

Creator: Watt, W. O.

Object Type: Newspaper

System: The Gateway to Oklahoma History

(open access)

Spectrum Policy in the Age of Broadband: Issues for Congress

This report discusses some of the commercial and federal radio frequency spectrum policy changes required by the Middle Class Tax Relief and Job Creation Act of 2012. It also summarizes new policy directions for spectrum management under consideration in the 112th Congress, such as the encouragement of new technologies that use spectrum more efficiently.

Date: May 28, 2013

Creator: Moore, Linda K.

Object Type: Report

System: The UNT Digital Library