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51,400 Matching Results
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3 V manganese oxide electrode materials for lithium batteries.
None
Date:
June 20, 2000
Creator:
Johnson, C. S. & Thackeray, M. M.
Object Type:
Article
System:
The UNT Digital Library
The 4.8 GHz LHC Schottky pick-up system
The LHC Schottky observation system is based on traveling wave type high sensitivity pickup structures operating at 4.8 GHz. The choice of the structure and operating frequency is driven by the demanding LHC impedance requirements, where very low impedance is required below 2 GHz, and good sensitivity at the selected band at 4.8 GHz. A sophisticated filtering and triple down -mixing signal processing chain has been designed and implemented in order to achieve the specified 100 dB instantaneous dynamic range without range switching. Detailed design aspects for the complete systems and test results without beam are presented and discussed.
Date:
June 1, 2007
Creator:
Caspers, Fritz; Jimenez, Jose Miguel; Jones, Rhodri Owain; Kroyer, Tom; Vuitton, Christophe; Hamerla, Timothy W. et al.
Object Type:
Article
System:
The UNT Digital Library
4-D High-Resolution Seismic Reflection Monitoring of Miscible CO2 Injected into a Carbonate Reservoir
The objective of this research project was to acquire, process, and interpret multiple high-resolution 3-D compressional wave and 2-D, 2-C shear wave seismic data in the hopes of observing changes in fluid characteristics in an oil field before, during, and after the miscible carbon dioxide (CO{sub 2}) flood that began around December 1, 2003, as part of the DOE-sponsored Class Revisit Project (DOE No.DE-AC26-00BC15124). Unique and key to this imaging activity is the high-resolution nature of the seismic data, minimal deployment design, and the temporal sampling throughout the flood. The 900-m-deep test reservoir is located in central Kansas oomoldic limestones of the Lansing-Kansas City Group, deposited on a shallow marine shelf in Pennsylvanian time. After 30 months of seismic monitoring, one baseline and eight monitor surveys clearly detected changes that appear consistent with movement of CO{sub 2} as modeled with fluid simulators and observed in production data. Attribute analysis was a very useful tool in enhancing changes in seismic character present, but difficult to interpret on time amplitude slices. Lessons learned from and tools/techniques developed during this project will allow high-resolution seismic imaging to be routinely applied to many CO{sub 2} injection programs in a large percentage of shallow carbonate …
Date:
June 30, 2007
Creator:
Miller, Richard D.; Raef, Abdelmoneam E.; Byrnes, Alan P. & Harrison, William E.
Object Type:
Report
System:
The UNT Digital Library
4 kW Test of Solid Oxide Electrolysis Stacks with Advanced Electrode-Supported Cells
A new test stand has been developed at the Idaho National Laboratory for multi-kW testing of solid oxide electrolysis stacks. This test stand will initially be operated at the 4 KW scale. The 4 kW tests will include two 60-cell stacks operating in parallel in a single hot zone. The stacks are internally manifolded with an inverted-U flow pattern and an active area of 100 cm2 per cell. Process gases to and from the two stacks are distributed from common inlet/outlet tubing using a custom base manifold unit that also serves as the bottom current collector plate. The solid oxide cells incorporate a negative-electrode-supported multi-layer design with nickel-zirconia cermet negative electrodes, thin-film yttria-stabilized zirconia electrolytes, and multi-layer lanthanum ferrite-based positive electrodes. Treated metallic interconnects with integral flow channels separate the cells and electrode gases. Sealing is accomplished with compliant mica-glass seals. A spring-loaded test fixture is used for mechanical stack compression. Due to the power level and the large number of cells in the hot zone, process gas flow rates are high and heat recuperation is required to preheat the cold inlet gases upstream of the furnace. Heat recuperation is achieved by means of two inconel tube-in-tube counter-flow heat exchangers. …
Date:
June 1, 2012
Creator:
O'Brien, J. E.; Zhang, X.; Housley, G. K.; Moore-McAteer, L. & Tao, G.
Object Type:
Article
System:
The UNT Digital Library
4$pi$ detector for correlation experiments
None
Date:
June 12, 1975
Creator:
Thorndike, A. M.
Object Type:
Report
System:
The UNT Digital Library
A 4 to 0.1 nm FEL Based on the SLAC Linac
The author show that using existing electron gun technology and a high energy linac like the one at SLAC, it is possible to build a Free Electron Laser operating around the 4 nm water window. A modest improvement in the gun performance would further allow to extend the FEL to the 0.1 nm region. Such a system would produce radiation with a brightness many order of magnitude above that of any synchrotron radiation source, existing or under construction, with laser power in the multigawatt region and subpicosecond pulse length.
Date:
June 5, 2012
Creator:
Pellegrini, C.
Object Type:
Article
System:
The UNT Digital Library
5. 8 GHz ophthalmic microwave applicator for treatment of choroidal melanoma
We report on the use of a 5.8 GHz microwave applicator to treat choroidal melanoma (Greene) in rabbits. The physical requirements needed to treat these intraocular tumors are quite different from those encountered elsewhere in the body. From a trans-scleral approach the penetration needed is minimal (5 to 10 mm.). The fibrous sclera is the only structure between the heat source and the tumor. The sclera has a relatively low water content when compared to tumor. This fact in addition to the frequency dependent interactions of tissue and electromagnetic radiation, results in an advantage to the use of the 5.8 GHz microwave device in treating intraocular malignancies.
Date:
June 1983
Creator:
Finger, Paul T.; Packer, Samuel; Svitra, Paul; Paglione, Robert W.; Albert, Daniel M. & Chess, Jeremy
Object Type:
Article
System:
The UNT Digital Library
5. annual clean coal technology conference: powering the next millennium. Volume 2
The Fifth Annual Clean Coal Technology Conference focuses on presenting strategies and approaches that will enable clean coal technologies to resolve the competing, interrelated demands for power, economic viability, and environmental constraints associated with the use of coal in the post-2000 era. The program addresses the dynamic changes that will result from utility competition and industry restructuring, and to the evolution of markets abroad. Current projections for electricity highlight the preferential role that electric power will have in accomplishing the long-range goals of most nations. Increase demands can be met by utilizing coal in technologies that achieve environmental goals while keeping the cost- per-unit of energy competitive. Results from projects in the DOE Clean Coal Technology Demonstration Program confirm that technology is the pathway to achieving these goals. The industry/government partnership, cemented over the past 10 years, is focused on moving the clean coal technologies into the domestic and international marketplaces. The Fifth Annual Clean Coal Technology Conference provides a forum to discuss these benchmark issues and the essential role and need for these technologies in the post-2000 era. This volume contains technical papers on: advanced coal process systems; advanced industrial systems; advanced cleanup systems; and advanced power generation systems. …
Date:
June 1, 1997
Creator:
unknown
Object Type:
Article
System:
The UNT Digital Library
5 kWe reactor power distributions
None
Date:
June 26, 1972
Creator:
Bost, D.S.
Object Type:
Report
System:
The UNT Digital Library
5-level polysilicon surface micromachine technology: Application to complex mechanical systems
The authors recently reported on the development of a 5-level poly-ilicon surface micromachine fabrication process consisting of four levels of mechanical poly plus an electrical interconnect layer. They are now reporting on the first components designed for and fabricated in this process. These are demonstration systems, which definitively show that five levels of polysilicon provide greater performance, reliability, and significantly increased functionality. This new technology makes it possible to realize levels of system complexity that have so far only existed on paper, while simultaneously adding to the robustness of many of the individual subassemblies.
Date:
June 1, 1998
Creator:
Rodgers, M. S. & Sniegowski, J. J.
Object Type:
Article
System:
The UNT Digital Library
5 MW pulsed spallation neutron source, Preconceptual design study
This report describes a self-consistent base line design for a 5 MW Pulsed Spallation Neutron Source (PSNS). It is intended to establish feasibility of design and as a basis for further expanded and detailed studies. It may also serve as a basis for establishing project cost (30% accuracy) in order to intercompare competing designs for a PSNS not only on the basis of technical feasibility and technical merit but also on the basis of projected total cost. The accelerator design considered here is based on the objective of a pulsed neutron source obtained by means of a pulsed proton beam with average beam power of 5 MW, in {approx} 1 {mu}sec pulses, operating at a repetition rate of 60 Hz. Two target stations are incorporated in the basic facility: one for operation at 10 Hz for long-wavelength instruments, and one operating at 50 Hz for instruments utilizing thermal neutrons. The design approach for the proton accelerator is to use a low energy linear accelerator (at 0.6 GeV), operating at 60 Hz, in tandem with two fast cycling booster synchrotrons (at 3.6 GeV), operating at 30 Hz. It is assumed here that considerations of cost and overall system reliability may favor …
Date:
June 1, 1994
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
A 6.3 T Bend Magnet for the Advanced Light Source
The Advanced Light Source (ALS) is a 1.5 to 1.9 GeV high-brightness electron storage ring operating at Lawrence Berkeley Laboratory (LBL) that provides synchrotron radiation for a large variety of users. It Is proposed to replace three of the thirty six 1.5T, one meter long bend magnets with very sbort high-field superconductlng (SC) dipoles. These magnets would provide bend-magnet synchrotron radiation to six bcamlines with a critical energy of at least 6 keV that is much better suited for protein crystallography and other small-sample x-ray diffraction and adsorption studies, than is currently available at the ALS. The magnet design is described, including coil, yoke, magnetic field analysis, and cyrostat. A prototype magnet is under construction at LBL.
Date:
June 7, 1995
Creator:
Taylor, C. E. & Caspi, S.
Object Type:
Report
System:
The UNT Digital Library
An 8 GeV H- multi-turn injection system for the Fermilab Main Injector
An 8 GeV superconducting linear accelerator (SCL) has been proposed [1] as a single stage H{sup -} injector into the Main Injector (MI) synchrotron . This would be the highest energy H{sup -} multi-turn injection system in the world. The conceptual design of an injection system has been further refined by addressing transverse phase space painting issues, chicane dipole fields and foil location, foil temperature issues, and initial longitudinal phase space painting simulations. We present the current state of design.
Date:
June 1, 2007
Creator:
Johnson, D. E.; Yoon, P.; Liaw, C. J.; Raparia, D. & Bebee-Wang, J.
Object Type:
Article
System:
The UNT Digital Library
An 8 GeV H- multi-turn injection system for the Fermilab Main Injector
None
Date:
June 1, 2007
Creator:
Johnson, D. E.; Yoon, P.; Liaw, C. J.; Raparia, D. & Bebee-Wang, J.
Object Type:
Article
System:
The UNT Digital Library
An 8-GeV Synchrotron-Based Proton Driver
In January 2002, the Fermilab Director initiated a design study for a high average power, modest energy proton facility. Such a facility is a possible candidate for a construction project in the U.S. starting in the middle of this decade. The key technical element is a new machine, dubbed the ''Proton Driver,'' as a replacement of the present Booster. The study of an 8-GeV synchrotron-based proton driver has been completed and published. This paper will give a summary report, including machine layout and performance, optics, beam dynamics issues, technical systems design, civil construction, cost estimate and schedule.
Date:
June 4, 2003
Creator:
Chou, Weiren
Object Type:
Article
System:
The UNT Digital Library
The 8-GeV transfer line injection into main ring
Included in this report are a brief review of the design lattice of the 8-GeV beam transfer line and the Main Ring, the recent measurements on the 8-GeV line lattice function as well as that of the Main Ring at 8-GeV. The injection matching is a very important part of the MR operation. Mismatches such as energy, timing, or position are easily corrected because they cause oscillations which are visible on the Turn-By-Turn (TBT) TV monitor display. Mis-matches due to beta and dispersion functions are detected only by using the Flying Wire or by doing measurements during beam study. A new method which makes use of the available data from TBT hardware was used to obtain the beam phase space ellipse. Data taken from Main Ring at injection gives the beta function needed for transfer matching from 8-GeV line. The result of this measurement is also presented here.
Date:
June 1, 1995
Creator:
Yang, M. J.
Object Type:
Report
System:
The UNT Digital Library
8 steps in grading soybeans : under revised standards, effective September 1, 1949.
An explanation of the process used by U.S. federal grain inspectors to grade soybeans. Factors include odor, weevil or garlic infestation, moisture, weight per bushel, foreign material, mixed colors, splits, and damage.
Date:
June 1949
Creator:
United States. Extension Service.
Object Type:
Book
System:
The UNT Digital Library
9-11 Commission Hearing #12, June 16, 2004, Part 1
Recording of the twelfth public hearing held by the National Commission on Terrorist Attacks upon the United States on June 16, 2004 at the NTSB Conference Center in Washington, D.C. The two-day hearing focused on two distinct topics: the 9-11 Plot and the federal government's immediate response to the attacks on September 11, 2001. This section includes the staff statement entitled overview of the enemy in addition to the first panel on Al-Qaeda with testimony from Mary Deborah Doran and Patrick J. Fitzgerald.
Date:
June 16, 2004
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-11 Commission Hearing #12, June 16, 2004, Part 2
Recording of the twelfth public hearing held by the National Commission on Terrorist Attacks upon the United States on June 16, 2004 at the NTSB Conference Center in Washington, D.C. The two-day hearing focused on two distinct topics: the 9-11 Plot and the federal government's immediate response to the attacks on September 11, 2001. This section includes the staff statement entitled outline of the 9/11 plot, in addition to the second panel on the outline of the outline of the 9/11 plot with testimony from Jacqueline Maguire, James N. Fitzgerald, and Adam B. Drucker.
Date:
June 16, 2004
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-11 Commission Hearing #12, June 17, 2004, Part 1
Recording of the twelfth public hearing held by the National Commission on Terrorist Attacks upon the United States on June 17, 2004 at the NTSB Conference Center in Washington, D.C. The two-day hearing focused on two distinct topics: the 9-11 Plot and the federal government's immediate response to the attacks on September 11, 2001. This section includes the staff statement entitled improvising a homeland defense in addition to the panel on military response on 9/11, with testimony from Richard Myers, Charles Joseph Leidig, and Ralph E. Eberhart.
Date:
June 17, 2004
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-11 Commission Hearing #12, June 17, 2004, Part 2
Recording of the twelfth public hearing held by the National Commission on Terrorist Attacks upon the United States on June 17, 2004 at the NTSB Conference Center in Washington, D.C. The two-day hearing focused on two distinct topics: the 9-11 Plot and the federal government's immediate response to the attacks on September 11, 2001. This section concludes the hearing, and includes the panel on FAA response on 9/11, with testimony from Monte Belger, Jeff Griffith, John White, and Benedict Sliney.
Date:
June 17, 2004
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-{beta}-arabinofuranosyladenine preferentially sensitizes radioresistant squamous cell carcinoma cell lines to x-rays
The effect of 9-{beta}-arabinofuranosyladenine (ara-A) on sensitivity to the deleterious effects of x-rays was studied in six squamous cell carcinoma cell lines. Three lines were relatively radioresistant, having D{sub 0} values of 2.31 to 2.89 Gy, and the other three lines were relatively radiosensitive, having D{sub 0} values of between 1.07 and 1.45 Gy. Ara-A (50 or 500 {mu}M) was added to cultures 30 min prior to irradiation and removed 30 min after irradiation, and sensitivity was measured in terms of cell survival. The radiosensitizing effect of ara-A was very dependent on the inherent radiosensitivity of the tumor cell line. Fifty micromolar concentrations of ara-A sensitized only the two most radioresistant lines, SCC-12B.2 and JSQ-3. Five hundred micromolar concentrations of ara-A sensitized the more sensitive cell lines, SQ-20B and SQ-9G, but failed to have any effect on the radiation response of the two most sensitive cell lines, SQ-38 and SCC-61. Concentrations of ara-A as low as 10 {mu}M were equally efficient in inhibiting DNA synthesis in all six cell lines. These results suggest that the target for the radiosensitizing effect of ara-A is probably related to the factor controlling the inherent radiosensitivity of human tumor cells. Therefore, ara-A might be …
Date:
June 1, 1992
Creator:
Heaton, D.; Mustafi, R. & Schwartz, J. L.
Object Type:
Report
System:
The UNT Digital Library
10 (micro)m and 5 (micro)m Pinhole-Assisted Point-Projection Backlit Imaging for NIF
Pinhole-assisted point-projection backlighting with 10{micro}m and 5 {micro}m pinholes placed a small distance of order 1 mm away from the backlighter produces images with large field of view and high resolution. Pinholes placed closely to high-power backlighter sources can vaporize and close due to x-ray driven ablation, thereby limiting the usefulness of this method. A study of streaked 1-D backlit imaging of 25 {micro}m W wires using the OMEGA laser is presented. The pinhole closure timescale for 10 {micro}m pinholes placed 0.45 mm and 1 mm distant from the backlighter is 1.3 ns and 2.2 ns, respectively. Similar timescales for 5 {micro}m pinholes is also presented. Successful wire imaging prior to pinhole closure is clearly demonstrated.
Date:
June 5, 2001
Creator:
Bullock, A. B.; Landen, O. L. & Bradley, D. K.
Object Type:
Article
System:
The UNT Digital Library
10 microsecond time resolution studies of Cygnus X-1
Time variability analyses have been applied to data composed of event times of X-rays emitted from the binary system Cygnus X-1 to search for unique black hole signatures. The X-ray data analyzed was collected at ten microsecond time resolution or better from two instruments, the High Energy Astrophysical Observatory (HEAO) A-1 detector and the Rossi X-ray Timing Explorer (XTE) Proportional Counter Array (PCA). HEAO A-1 and RXTE/PCA collected data from 1977--79 and from 1996 on with energy sensitivity from 1--25 keV and 2--60 keV, respectively. Variability characteristics predicted by various models of an accretion disk around a black hole have been searched for in the data. Drop-offs or quasi-periodic oscillations (QPOs) in the Fourier power spectra are expected from some of these models. The Fourier spectral technique was applied to the HEAO A-1 and RXTE/PCA data with careful consideration given for correcting the Poisson noise floor for instrumental effects. Evidence for a drop-off may be interpreted from the faster fall off in variability at frequencies greater than the observed breaks. Both breaks occur within the range of Keplerian frequencies associated with the inner edge radii of advection-dominated accretion disks predicted for Cyg X-1. The break between 10--20 Hz is also …
Date:
June 1, 1997
Creator:
Wen, H.C.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library