230 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Atmospheric Pressure"  
Results: 1 - 24 next
open access

Further study of the variability in the frequency of typhoon formation over the West Pacific ocean

Description: This paper presents a study of the variability in the frequency of typhoon formation over the West Pacific ocean, emphasizing the effects of the large-scale sea-air system on the activity of typhoons. Some important relationships between typhoon formation and the climatological aspect of air-sea interaction are pointed out.
Date: 1980~
Creator: Ding, Yi-Hui & Reiter, Elmar R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Reservoir response to tidal and barometric effects

Description: Solid earth tidal strain and surface loading due to fluctuations in barometric pressure have the effect, although extremely minute, of dilating or contracting the effective pore volume in a porous reservoir. If a well intersects the formation, the change in pore pressure can be measured with sensitive quartz pressure gauges. Mathematical models of the relevant fluid dynamics of the well-reservoir system have been generated and tested against conventional well pumping results or core data at the… more
Date: May 29, 1980
Creator: Hanson, J.M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Investigation of radon-222 emissions from underground uranium mines. Progress report No. 2

Description: A reliable estimate of radon emissions to the environment from underground uranium mines was obtained through measurements of radon in ventilation exhaust air at 24 uranium mines and estimates of radon release from ore piles and waste piles at mines and in water pumped from mines. Three additional mines sampled in 1978 but not in 1979 were included in the overall results. Total production of U/sub 3/O/sub 8/ from the mines thus far sampled represent about 63% of total 1978 US production from un… more
Date: February 1, 1980
Creator: Jackson, P. O.; Glissmeyer, J. A.; Enderlin, W. I.; Schwendiman, L. C.; Wogman, N. A. & Perkins, R. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Fixed-bed gasification research using US coals. Volume 18. Program data summary and correlations. [C/sub 2/ and C/sub 3/ hydrocarbons]

Description: A single-staged, fixed-bed, Wellman-Galusha gasifier coupled with a hot, raw gas combustion system and scrubber has been used to gasify numerous coals from throughout the United States. The gasification test program is organized as a cooperative effort by private industrial participants and government agencies. The consortium of participants is organized under the Mining and Industrial Fuel Gas Group (MIFGa). This report is the eighteenth volume in a series of reports describing the atmospheric… more
Date: December 1, 1985
Creator: Thimsen, D.; Maurer, R. E.; Lannto, O.; Pui, D. & Yeh, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Simulation of the steady-state transport of radon from soil into houses with basements under constant negative pressure

Description: A theoretical model was developed to simulate this phenomenon, under some specific assumptions. The model simulates: the generation and decay of radon within the soil; its transport throughout the soil due to diffusion and convection induced by the pressure disturbance applied at a crack in the basement; its entrance into the house through the crack; and the resultant indoor radon concentration. The most important assumptions adopted in the model were: a steady-state condition; a house with a b… more
Date: May 1, 1987
Creator: de Oliveira Loureiro, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Barometric pressure transient testing applications at the Nevada Test Site: formation permeability analysis. Final report

Description: The report evaluates previous investigations of the gas permeability of the rock surrounding emplacement holes at the Nevada Test Site. The discussion sets the framework from which the present uncertainty in gas permeability can be overcome. The usefulness of the barometric pressure testing method has been established. Flow models were used to evaluate barometric pressure transients taken at NTS holes U2fe, U19ac and U20ai. 31 refs., 103 figs., 18 tabs. (ACR)
Date: December 1, 1984
Creator: Hanson, J.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Experimental and theoretical studies of particle generation afterlaser ablation of copper with background gas at atmosphericpressure

Description: Laser ablation has proven to be an effective method for generating nanoparticles; particles are produced in the laser induced vapor plume during the cooling stage. To understand the in-situ condensation process, a series of time resolved light scattering images were recorded and analyzed. Significant changes in the condensation rate and the shape of the condensed aerosol plume were observed in two background gases, helium and argon. The primary particle shape and size distribution were measured… more
Date: May 31, 2007
Creator: Wen, Sy-Bor; Mao, Xianglei; Greif, Ralph & Russo, Richard E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

SIEMENS ADVANCED QUANTRA FTICR MASS SPECTROMETER FOR ULTRA HIGH RESOLUTION AT LOW MASS

Description: The Siemens Advanced Quantra Fourier Transform Ion Cyclotron Resonance (FTICR) mass spectrometer was evaluated as an alternative instrument to large double focusing mass spectrometers for gas analysis. High resolution mass spectrometers capable of resolving the common mass isomers of the hydrogen isotopes are used to provide data for accurate loading of reservoirs and to monitor separation of tritium, deuterium, and helium. Conventional double focusing magnetic sector instruments have a resolut… more
Date: July 8, 2008
Creator: Spencer, W & Laura Tovo, L
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development of Materials Resistant to Metal Dusting Degradation.

Description: The deposition of carbon from carbonaceous gaseous environments is prevalent in many chemical and petrochemical processes such as, hydrogen-, ammonia-, and methanol-reforming systems, syngas production systems, and iron-ore reduction plants. One of the major consequences of carbon deposition is the degradation of structural materials by a phenomenon known as ''metal dusting''. There are two major issues of importance in metal dusting. First is formation of coke and subsequent deposition of coke… more
Date: December 7, 2007
Creator: Natesan, K. & Zeng, Z.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Comparison Between Research-Grade and Commercially Available SnO2 for Thin-Film CdTe Solar Cells: Preprint

Description: Compared to commercial SnO2 (with similar film thickness and sheet resistance), research-grade SnO2 has higher optical transmittance and higher electron mobility. Based on our study, changing the glass substrate and improving the SnO2 quality could improve the optical properties of commercial SnO2.
Date: May 1, 2008
Creator: Li, X.; Pankow, J.; To, B. & Gessert, T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Conceptual Design of a MEDE Treatment System for Sodium Bonded Fuel

Description: Unirradiated sodium bonded metal fuel and casting scrap material containing highly enriched uranium (HEU) is stored at the Materials and Fuels Complex (MFC) on the Idaho National Laboratory (INL). This material, which includes intact fuel assemblies and elements from the Fast Flux Test Facility (FFTF) and Experimental Breeder Reactor-II (EBR-II) reactors as well as scrap material from the casting of these fuels, has no current use under the terminated reactor programs for both facilities. The D… more
Date: May 1, 2008
Creator: Baily, Carl E.; Moore, Karen A.; Knight, Collin J.; Wells, Peter B.; Petersen, Paul J.; Siahpush, Ali S. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Laser Drilling - Drilling with the Power of Light

Description: Gas Technology Institute (GTI) has been the leading investigator in the field of high power laser applications research for well construction and completion applications. Since 1997, GTI (then as Gas Research Institute- GRI) has investigated several military and industrial laser systems and their ability to cut and drill into reservoir type rocks. In this report, GTI continues its investigation with a 5.34 kW ytterbium-doped multi-clad high power fiber laser (HPFL). When compared to its competi… more
Date: February 28, 2007
Creator: Salehi, Iraj A.; Gahan, Brian C. & Batarseh, Samih
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Validation Testing of Hydrogen Generation Technology

Description: This report describes the results of testing performed by ORNL for Photech Energies, Inc. The objective of the testing was to evaluate the efficacy of Photech's hydrogen generation reactor technology, which produces gaseous hydrogen through electrolysis. Photech provided several prototypes of their proprietary reactor for testing and the ancillary equipment, such as power supplies and electrolyte solutions, required for proper operation of the reactors. ORNL measured the production of hydrogen … more
Date: December 1, 2007
Creator: Smith, Barton & Toops, Todd J
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Physical property changes in hydrate-bearingsediment due to depressurization and subsequent repressurization

Description: Physical property measurements of sediment cores containing natural gas hydrate are typically performed on material exposed at least briefly to non-in situ conditions during recovery. To examine effects of a brief excursion from the gas-hydrate stability field, as can occur when pressure cores are transferred to pressurized storage vessels, we measured physical properties on laboratory-formed sand packs containing methane hydrate and methane pore gas. After depressurizing samples to atmospheric… more
Date: June 1, 2008
Creator: Kneafsey, Timothy; Waite, W.F.; Kneafsey, T.J.; Winters, W.J. & Mason, D.H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Six-week time series of eddy covariance CO2 flux at Mammoth Mountain, California: performance evaluation and role of meteorological forcing

Description: CO{sub 2} and heat fluxes were measured over a six-week period (09/08/2006 to 10/24/2006) by the eddy covariance (EC) technique at the Horseshoe Lake tree kill (HLTK), Mammoth Mountain, CA, a site with complex terrain and high, spatially heterogeneous CO{sub 2} emission rates. EC CO{sub 2} fluxes ranged from 218 to 3500 g m{sup -2} d{sup -1} (mean = 1346 g m{sup -2} d{sup -1}). Using footprint modeling, EC CO{sub 2} fluxes were compared to CO{sub 2} fluxes measured by the chamber method on a gr… more
Date: October 15, 2007
Creator: Lewicki, Jennifer; Lewicki, J. L.; Fischer, M. L. & Hilley, G. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Analysis of crude oil vapor pressures at the U.S. Strategic Petroleum Reserve.

Description: Crude oil storage caverns at the U.S. Strategic Petroleum Reserve (SPR) are solution-mined from subsurface salt domes along the U.S. Gulf Coast. While these salt domes exhibit many attractive characteristics for large-volume, long-term storage of oil such as low cost for construction, low permeability for effective fluids containment, and secure location deep underground, they also present unique technical challenges for maintaining oil quality within delivery standards. The vapor pressures of … more
Date: August 1, 2005
Creator: Rudeen, David Keith (GRAM, Inc., Albuquerque, NM) & Lord, David L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Apparatus and Method for Increasing the Diameter of Metal Alloy Wires Within a Molten Metal Pool

Description: In a dip forming process the core material to be coated is introduced directly into a source block of coating material eliminating the need for a bushing entrance component. The process containment vessel or crucible is heated so that only a portion of the coating material becomes molten, leaving a solid portion of material as the entrance port of, and seal around, the core material. The crucible can contain molten and solid metals and is especially useful when coating core material with reacti… more
Date: January 29, 2002
Creator: Hartman, Alan D.; Argetsinger, Edward R.; Hansen, Jeffrey S.; Paige, Jack I.; King, Paul E. & Turner, Paul C.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
open access

Comparison Between Research-Grade SnO2 and Commercial Available SnO2 for Thin-Film CdTe Solar Cell (Poster)

Description: A comparison between research-grade, tin-oxide (SnO{sub 2}) thin films and those available from commercial sources is performed. The research-grade SnO{sub 2} film is fabricated at NREL by low-pressure metal-organic chemical vapor deposition. The commercial SnO{sub 2} films are Pilkington Tec 8 and Tec 15 fabricated by atmospheric-pressure chemical vapor deposition. Optical, structural, and compositional analyses are performed. From the optical analysis, an estimation of the current losses due … more
Date: May 1, 2008
Creator: Li, X.; Pankow, J.; To, B. & Gessert, T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

ARM Mobile Facility Surface Meteorology Handbook - October 2008

Description: The ARM Mobile Facility Surface Meteorology station (AMF MET) uses mainly conventional in situ sensors to obtain 1-minute statistics of surface wind speed, wind direction, air temperature, relative humidity, barometric pressure, and rain-rate. Additional sensors may be added to or removed from the base set of sensors depending upon the deployment location, climate regime or programmatic needs. Additionally, sensor types may change depending upon the climate regime of the deployment. These chang… more
Date: October 30, 2008
Creator: Ritsche, M. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Ambient pressure photoelectron spectroscopy: a new tool for surface science and nanotechnology

Description: Progress in science often follows or parallels the development of new techniques. The optical microscope helped convert medicine and biology from a speculative activity in old times to today's sophisticated scientific disciplines. The telescope changed the study and interpretation of heavens from mythology to science. X-ray diffraction enabled the flourishing of solid state physics and materials science. The technique object of this review, Ambient Pressure Photoelectron Spectroscopy or APPES f… more
Date: March 12, 2008
Creator: Salmeron, Miquel; Salmeron, Miquel & Schlogl, Robert
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Experimental study of radium partitioning between anorthite and melt at 1 atm

Description: We present the first experimental radium mineral/melt partitioning data, specifically between anorthite and a CMAS melt at atmospheric pressure. Ion microprobe measurement of coexisting anorthite and glass phases produces a molar D{sub Ra} = 0.040 {+-} 0.006 and D{sub Ra}/D{sub Ba} = 0.23 {+-} 0.05 at 1400 C. Our results indicate that lattice strain partitioning models fit the divalent (Ca, Sr, Ba, Ra) partition coefficient data of this study well, supporting previous work on crustal melting an… more
Date: March 8, 2007
Creator: Miller, S.; Burnett, D.; Asimow, P.; Phinney, D. & Hutcheon, I.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Fixed-bed gasification research using US coals. Volume 17. Gasification and liquids recovery of four US coals

Description: A single-staged, fixed-bed Wellman-Galusha gasifier coupled with a hot, raw gas combustion system and scrubber has been used to gasify numerous coals from throughout the United States. The gasification test program is organized as a cooperative effort by private industrial participants and government agencies. The consortium of participants is organized under the Mining and Industrial Fuel Gas (MIFGa) group. This report is the seventeenth in a series of reports describing the atmospheric pressu… more
Date: December 1, 1985
Creator: Thimsen, D.; Maurer, R. E.; Pooler, A. R.; Pui, D.; Liu, B. & Kittelson, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Fixed-bed gasification research using US coals. Volume 12. Gasification of Absaloka/Robinson subbituminous coal

Description: A single-staged, fixed-bed Wellman-Galusha gasifier coupled with a hot, raw gas combustion system and scrubber has been used to gasify numerous coals from throughout the United States. The gasification test program is organized as a cooperative effort by private industrial particpants and governmental agencies. The consortium of participants is organized under the Mining and Industrial Fuel Gas (MIFGa) Group. This report is the twelfth volume in a series of reports describing the atmospheric pr… more
Date: May 1, 1985
Creator: Thimsen, D.; Maurer, R. E.; Pooler, A. R.; Pui, D.; Liu, B. & Kittelson, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Fixed-bed gasification research using US coals. Volume 5. Gasification of Stahlman Stoker bituminous coal

Description: A single-staged, fixed-bed Wellman-Galusha gasifier coupled with a hot, raw gas combustion system and scrubber has been used to gasify numerous coals from throughout the United States. The gasification test program is organized as a cooperative effort by private industrial participants and governmental agencies. The consortium of participants is organized under the Mining and Industrial Fuel Gas (MIFGa) Group. This report is the fifth volume in a series of reports describing the atmospheric pre… more
Date: March 31, 1985
Creator: Thimsen, D.; Maurer, R. E.; Pooler, A. R.; Pui, D.; Liu, B. & Kittelson, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen