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100 LPW 800 Lm Warm White LED
An illumination grade warm white (WW) LED, having correlated color temperature (CCT) between 2800 K and 3500K and capable of producing 800 lm output at 100 lm/W, has been developed in this program. The high power WW LED is an ideal source for use as replacement for incandescent, and Halogen reflector and general purpose lamps of similar lumen value. Over the two year period, we have made following accomplishments: developed a high power warm white LED product and made over 50% improvements in light output and efficacy. The new high power WW LED product is a die on ceramic surface mountable LED package. It has four 1x1 mm{sup 2} InGaN pump dice flip chip attached to a ceramic submount in 2x2 array, covered by warm white phosphor ceramic platelets called Lumiramic⢠and an overmolded silicone lens encapsulating the LED array. The performance goal was achieved through breakthroughs in following key areas: (1) High efficiency pump LED development through pump LED active region design and epi growth quality improvement (funded by internal programs). (2) Increase in injection efficiency (IE) represented by reduction in forward voltage (V{sub f}) through the improvement of the silver-based p-contact and a reduction in spreading resistance. The …
Date:
October 31, 2010
Creator:
Sun, Decai
Object Type:
Report
System:
The UNT Digital Library
The Altus Times (Altus, Okla.), Vol. 112, No. 235, Ed. 1 Sunday, October 31, 2010
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
October 31, 2010
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Baytown Sun (Baytown, Tex.), Vol. 90, No. 217, Ed. 1 Sunday, October 31, 2010
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
October 31, 2010
Creator:
Halter Gray, Janie
Object Type:
Newspaper
System:
The Portal to Texas History
Ion acceleration and cooling in gasless self-sputtering
Copper plasma with hyperthermal directed velocity (8.8 eV) but very low temperature (0.6 eV) has been obtained using self-sputtering far above the runaway threshold. Ion energy distribution functions (IEDFs) were simultaneously measured at 34 locations. The IEDFs show the tail of the Thompson distribution near the magnetron target. They transform to shifted Maxwellians with the ions being accelerated and cooled. We deduce the existence of a highly asymmetric, pressure-driven potential hump which acts as a controlling"watershed" between the ion return flux and the expanding plasma.
Date:
October 31, 2010
Creator:
Horwat, David & Anders, Andre
Object Type:
Article
System:
The UNT Digital Library
Isotopic Tracking of Hanford 300 Area Derived Uranium in the Columbia River
Our objectives in this study are to quantify the discharge rate of uranium (U) to the Columbia River from the Hanford Site's 300 Area, and to follow that U down river to constrain its fate. Uranium from the Hanford Site has variable isotopic composition due to nuclear industrial processes carried out at the site. This characteristic makes it possible to use high-precision isotopic measurements of U in environmental samples to identify even trace levels of contaminant U, determine its sources, and estimate discharge rates. Our data on river water samples indicate that as much as 3.2 kg/day can enter the Columbia River from the 300 Area, which is only a small fraction of the total load of dissolved natural background U carried by the Columbia River. This very low-level of Hanford derived U can be discerned, despite dilution to < 1 percent of natural background U, 350 km downstream from the Hanford Site. These results indicate that isotopic methods can allow the amounts of U from the 300 Area of the Hanford Site entering the Columbia River to be measured accurately to ascertain whether they are an environmental concern, or are insignificant relative to natural uranium background in the Columbia …
Date:
October 31, 2010
Creator:
Christensen, John N.; Dresel, P. Evan; Conrad, Mark E.; Patton, Gregory W. & DePaolo, Donald J.
Object Type:
Article
System:
The UNT Digital Library
Low Probability Tail Event Analysis and Mitigation in the BPA Control Area
This report investigated the uncertainties with the operations of the power system and their contributions to tail events, especially under high penetration of wind. A Bayesian network model is established to quantify the impact of these uncertainties on system imbalance. The framework is presented for a decision support tool, which can help system operators better estimate the need for balancing reserves and prepare for tail events.
Date:
October 31, 2010
Creator:
Lu, Shuai; Brothers, Alan J.; McKinstry, Craig A.; Jin, Shuangshuang & Makarov, Yuri V.
Object Type:
Report
System:
The UNT Digital Library
Macroalgae for CO{sub 2} Capture and Renewable Energy - A Pilot Project
The objective of this project was to demonstrate, at a pilot scale, the beneficial use of carbon dioxide (CO{sub 2}) through a technology designed to capture CO2 from fossil-fuel fired power plant stack gas, generating macroalgae and converting the macroalgae at high efficiency to renewable methane that can be utilized in the power plant or introduced into a natural gas pipeline. The proposed pilot plant would demonstrate the cost-effectiveness and CO{sub 2}/ NO{sub x} flue-gas removal efficiency of an innovative âalgal scrubberâ technology where seaweeds are grown out of water on specially-designed supporting structures contained within greenhouses where the plants are constantly bathed by recycled nutrient sprays enriched by flue gas constituents. The work described in this document addresses Phase 1 of the project only. The scope of work for Phase 1 includes the completion of a preliminary design package; the collection of additional experimental data to support the preliminary and detailed design for a pilot scale utilization of CO{sub 2} to cultivate macroalage and to process that algae to produce methane; and a technological and economic analysis to evaluate the potential of the system. Selection criteria for macroalgae that could survive the elevated temperatures and potential periodic desiccation of …
Date:
October 31, 2010
Creator:
Wiley, Kristine
Object Type:
Report
System:
The UNT Digital Library
Master's Recital: 2010-10-16 - Jesse Orth, tuba
Access:
Use of this item is restricted to the UNT Community
Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Master of Music (MM) degree.
Date:
October 31, 2010
Creator:
Orth, Jesse
Object Type:
Sound
System:
The UNT Digital Library
Micro-fluidic (Lab-on the- Chip) PCR Array Cartridge for Biological Screening in a Hand Held Device: FInal Report for CRADA no 264. PNNL-T2-258-RU with CombiMatrix Corp
The worldwide emergence of both new and old diseases resulting from human expansion and also human and materials mobility has and will continue to place stress on both medical and clinical diagnostics. The classical approach to bioagents detection involves the use of differential metabolic assays to determine species type in the case of most bacteria, or the use of cell culture and electron microscopy to diagnose viruses and some bacteria that are intracellular parasites. The long-term goal in bioagent detection is to develop a hand-held instrument featuring disposable cartridges which contain all the necessary reagents, reaction chambers, waste chambers, and micro-fluidics to extract, concentrate, amplify, and analyze nucleic acids. This GIPP project began development of a sensory platform using nucleic-acid based probes. Although research was not completed, initial findings indicated that an advanced sensing device could theoretically be built on a DNA/RNA-based technology platform.
Date:
October 31, 2010
Creator:
Rainina, Evguenia I.
Object Type:
Report
System:
The UNT Digital Library
The Panola Watchman (Carthage, Tex.), Vol. 138, No. 87, Ed. 1 Sunday, October 31, 2010
Semiweekly newspaper from Carthage, Texas that includes local, state, and national news along with advertising.
Date:
October 31, 2010
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Polk County Enterprise (Livingston, Tex.), Vol. 128, No. 87, Ed. 1 Sunday, October 31, 2010
Semi-weekly newspaper from Livingston, Texas that includes local, state and national news along with advertising.
Date:
October 31, 2010
Creator:
Reddell, Valerie
Object Type:
Newspaper
System:
The Portal to Texas History
QuickSim Analysis Report
In software tools such as COMcheck, use of the EnergyPlus simulation engine for performance-based code compliance raises a concern about simulation runtime which impacts the dynamic feedback of compliance results to the user. EnergyPlus annual simulations for proposed and code base line building models, and the mechanical equipment sizing runs together increase the annual simulation runtime beyond unacceptable duration, for example, to 5 minutes for a typical small commercial building. This report presents a study undertaken to compare the results of a shortened simulation time period, using 4 weeks of weather data to do a simulation of a full 52 weeks of data. Three representative building types and three climate zones were used for determining the validity of using shortened simulation run period. Further sensitivity analysis and run time comparisons were made to evaluate the robustness and run time savings of using this approach. The results of this analysis show that the shortened simulation run period provides compliance index calculations within 1% of that predicted using annual simulation results, and typically saves about 75% of simulation runtime.
Date:
October 31, 2010
Creator:
Athalye, Rahul A.; Gowri, Krishnan; Glazer, Jason & Schultz, Robert W.
Object Type:
Report
System:
The UNT Digital Library
Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 96, No. 35, Ed. 1 Sunday, October 31, 2010
Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.
Date:
October 31, 2010
Creator:
Harmon, C. L.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Student Recital: 2010-10-31 - Woon-Tyen (Tammy) Lim, clarinet
Recital presented at the UNT College of Music Recital Hall.
Date:
October 31, 2010
Creator:
Lim, Woon-Tyen (Tammy)
Object Type:
Sound
System:
The UNT Digital Library
Sweetwater Reporter (Sweetwater, Tex.), Vol. 112, No. 296, Ed. 1 Sunday, October 31, 2010
Daily newspaper from Sweetwater, Texas that includes local, state, and national news along with advertising.
Date:
October 31, 2010
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Velocity Data Collection in the Corpus Christi Bay Ship Channel
Report documenting velocity data collected from the main shipping channel and in non-channelized portions of Corpus Christi Bay. The study was designed to provide data that can be used to better understand how the wind-driven flow through the main basin is coupled or decoupled from the tidally-driven flow in the ship channel.
Date:
October 31, 2010
Creator:
Gundlach, Laura C. & Hodges, Ben R.
Object Type:
Report
System:
The Portal to Texas History
[24-Hour Film Feast with Melvin Van Peebles tape 1]
Video footage from The Black Academy of Arts and Letters recorded during TBAALs 34th season 24-Hour Filmfeast featuring director Melvin Van Peebles. The footage features a live Q&A discussion with the director where he takes questions from the audience while going into detail about his early life and career.
Date:
October 30, 2010
Creator:
Peebles, Melvin Van
Object Type:
Video
System:
The UNT Digital Library
[24-Hour Film Feast with Melvin Van Peebles tape 2]
Video footage from The Black Academy of Arts and Letters recorded during TBAALs 34th season 24-Hour Filmfeast featuring director Melvin Van Peebles. The footage features a live Q&A discussion with the director where he takes questions from the audience while going into detail about his early life and career.
Date:
October 30, 2010
Creator:
Peebles, Melvin Van
Object Type:
Video
System:
The UNT Digital Library
[Concert Poster: We Shot JR is Dead]
Poster advertising a concert hosted by Fred Holston commemorating the end of the Denton blog We Shot JR. Bands performing include One Baptist General, White Drugs, Orange Coax, Early Lines, Fur, Geistheistler, Vulgar Fashion, Fungi Girls, Lychgate, Stelan Gonzalez, Cuckoo Byrds and Cygnus on October 30, 2010 at Rubber Gloves Rehearsal Studios in Denton, TX. Poster shows a painting of the lower half of a white horse with the stomach cut open and intestines showing against a stylized backdrop of the Dallas skyline. Colors are primarily red and white with blue accents.
Date:
October 30, 2010
Creator:
Hill, Nevada
Object Type:
Poster
System:
The UNT Digital Library
Dense Metal Plasma in a Solenoid for Ion Beam Neutralization
Space-charge neutralization is required to compress and focus a pulsed, high-current ion beam on a target for warm dense matter physics or heavy ion fusion experiments. We described approaches to produce dense plasma in and near the final focusing solenoid through which the ion beam travels, thereby providing an opportunity for the beam to acquire the necessary space-charge compensating electrons. Among the options are plasma injection from pulsed vacuum arc sources located outside the solenoid, and using a high current (> 4 kA) pulsed vacuum arc plasma from a ring cathode near the edge of the solenoid. The plasma distribution is characterized by photographic means, by an array of movable Langmuir probes, by a small single probe, and by evaluating Stark broadening of the Balmer H beta spectral line. In the main approach described here, the plasma is produced at several cathode spots distributed azimuthally on the ring cathode. It is shown that the plasma is essentially hollow, as determined by the structure of the magnetic field, though the plasma density exceeds 1014 cm-3 in practically all zones of the solenoid volume if the ring electrode is placed a few centimeters off the center of the solenoid. The plasma is …
Date:
October 30, 2010
Creator:
Anders, Andre; Kauffeldt, Marina; Oks, Efim M. & Roy, Prabir K.
Object Type:
Article
System:
The UNT Digital Library
Doctoral Recital: 2010-10-30 - Joseph Rinaldi, baritone
Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree.
Date:
October 30, 2010
Creator:
Rinaldi, Joseph
Object Type:
Sound
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Saturday, October 30, 2010
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
October 30, 2010
Creator:
Wray, Kelly
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Fiber-Optic Defect and Damage Locator System for Wind Turbine Blades
IFOS in collaboration with Auburn University demonstrated the feasibility of a Fiber Bragg Grating (FBG) integrated sensor system capable of providing real time in-situ defect detection, localization and quantification of damage. In addition, the system is capable of validating wind turbine blade structural models, using recent advances in non-contact, non-destructive dynamic testing of composite structures. This new generation method makes it possible to analyze wind turbine blades not only non-destructively, but also without physically contacting or implanting intrusive electrical elements and transducers into the structure. Phase I successfully demonstrated the feasibility of the technology with the construction of a 1.5 kHz sensor interrogator and preliminary instrumentation and testing of both composite material coupons and a wind turbine blade.
Date:
October 30, 2010
Creator:
Sotoudeh, Dr. Vahid; Black, Dr. Richard J.; Moslehi, Dr. Behzad & Plavsic, Mr. Aleks
Object Type:
Report
System:
The UNT Digital Library
Master's Recital: 2010-10-30 - Angelene Shultz, violin
Access:
Use of this item is restricted to the UNT Community
Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Master of Music (MM) degree.
Date:
October 30, 2010
Creator:
Shultz, Angelene
Object Type:
Sound
System:
The UNT Digital Library