Resource Type

Degree Department

States

Titanium-Alloy Power Capacitor: High-Power Titanate Capacitor for Power Electronics (open access)

Titanium-Alloy Power Capacitor: High-Power Titanate Capacitor for Power Electronics

ADEPT Project: There is a constant demand for better performing, more compact, lighter weight, and lower cost electronic devices. Unfortunately, the materials traditionally used to make components for electronic devices have reached their limits. Case Western is developing capacitors made of new materials that could be used to produce the next generation of compact and efficient high-powered consumer electronics and electronic vehicles. A capacitor is an important component of an electronic device. It stores an electric charge and then discharges it into an electrical circuit in the device. Case Western is creating its capacitors from titanium, an abundant material extracted from ore which can be found in the U.S. Case Western's capacitors store electric charges on the surfaces of films, which are grown on a titanium alloy electrode that is formed as a spinal column with attached branches. The new material and spine design make the capacitor smaller and lighter than traditional capacitors, and they enable the component to store 300% more energy than capacitors of the same weight made of tantalum, the current industry standard. Case Western's titanium-alloy capacitors also spontaneously self-repair, which prolongs their life.
Date: September 1, 2010
Creator: unknown
System: The UNT Digital Library
Utility-Scale Silicon Carbide Semiconductor: Monolithic Silicon Carbide Anode Switched Thyristor for Medium Voltage Power Conversion (open access)

Utility-Scale Silicon Carbide Semiconductor: Monolithic Silicon Carbide Anode Switched Thyristor for Medium Voltage Power Conversion

ADEPT Project: GeneSiC is developing an advanced silicon-carbide (SiC)-based semiconductor called an anode-switched thyristor. This low-cost, compact SiC semiconductor conducts higher levels of electrical energy with better precision than traditional silicon semiconductors. This efficiency will enable a dramatic reduction in the size, weight, and volume of the power converters and electronic devices it's used in.GeneSiC is developing its SiC-based semiconductor for utility-scale power converters. Traditional silicon semiconductors can't process the high voltages that utility-scale power distribution requires, and they must be stacked in complicated circuits that require bulky insulation and cooling hardware. GeneSiC's semiconductors are well suited for high-power applications like large-scale renewable wind and solar energy installations.
Date: September 1, 2010
Creator: unknown
System: The UNT Digital Library
Soluble Lead Flow Battery: Soluble Lead Flow Battery Technology (open access)

Soluble Lead Flow Battery: Soluble Lead Flow Battery Technology

GRIDS Project: General Atomics is developing a flow battery technology based on chemistry similar to that used in the traditional lead-acid battery found in nearly every car on the road today. Flow batteries store energy in chemicals that are held in tanks outside the battery. When the energy is needed, the chemicals are pumped through the battery. Using the same basic chemistry as a traditional battery but storing its energy outside of the cell allows for the use of very low cost materials. The goal is to develop a system that is far more durable than today’s lead-acid batteries, can be scaled to deliver megawatts of power, and which lowers the cost of energy storage below $100 per kilowatt hour.
Date: September 1, 2010
Creator: unknown
System: The UNT Digital Library
Utility-Scale Power Router: Dynamic Control of Grid Assets Using Direct AC Converter Cells (open access)

Utility-Scale Power Router: Dynamic Control of Grid Assets Using Direct AC Converter Cells

ADEPT Project: Georgia Tech is developing a cost-effective, utility-scale power router that uses an enhanced transformer to more efficiently direct power on the grid. Existing power routing technologies are too expensive for widespread use, but the ability to route grid power to match real-time demand and power outages would significantly reduce energy costs for utilities, municipalities, and consumers. Georgia Tech is adding a power converter to an existing grid transformer to better control power flows at about 1/10th the cost of existing power routing solutions. Transformers convert the high-voltage electricity that is transmitted through the grid into the low-voltage electricity that is used by homes and businesses. The added converter uses fewer steps to convert some types of power and eliminates unnecessary power storage, among other improvements. The enhanced transformer is more efficient, and it would still work even if the converter fails, ensuring grid reliability.
Date: September 1, 2010
Creator: unknown
System: The UNT Digital Library
Voltage Regulator Chip: Power Supplies on a Chip (open access)

Voltage Regulator Chip: Power Supplies on a Chip

ADEPT Project: CPES at Virginia Tech is finding ways to save real estate on a computer's motherboard that could be used for other critical functions. Every computer processor today contains a voltage regulator that automatically maintains a constant level of electricity entering the device. These regulators contain bulky components and take up about 30% of a computer's motherboard. CPES at Virginia Tech is developing a voltage regulator that uses semiconductors made of gallium nitride on silicon (GaN-on-Si) and high-frequency soft magnetic material. These materials are integrated on a small, 3D chip that can handle the same amount of power as traditional voltage regulators at 1/10 the size and with improved efficiency. The small size also frees up to 90% of the motherboard space occupied by current voltage regulators.
Date: September 1, 2010
Creator: unknown
System: The UNT Digital Library
SECA Coal-Based Systems (open access)

SECA Coal-Based Systems

This report documents the results of Cooperative Agreement DE-FC26-05NT42613 between Siemens Energy and the U.S. Department of Energy for the period October 1, 2008 through September 30, 2010. The Phase I POCD8R0 stack test was successfully completed as it operated for approximately 5,300 hrs and achieved all test objectives. The stack test article contained twenty-four 75 cm active length Delta8 scandia-stabilized zirconia cells. Maximum power was approximately 10 kWe and the SOFC generator demonstrated an availability factor of 85% at 50% power or greater. The Phase II POCD8R1 stack test operated for approximately 410 hrs before being aborted due to a sudden decrease in voltage accompanied by a rapid increase in temperature. The POCD8R1 test article contained forty-eight 100 cm active length Delta8 scandia-stabilized zirconia cells arranged in an array of six bundles, with each bundle containing eight cells. Cell development activities resulted in an approximate 100% improvement in cell power at 900°C. Cell manufacturing process improvements led to manufacturing yields of greater than 40% for the Delta8 cells. Delta8 cells with an active length of 100 cm were successfully manufactured as were cells with a seamless closed end. A pressurized cell test article was assembled, installed into the pressurized …
Date: September 1, 2010
Creator: Pierre, Joseph
System: The UNT Digital Library
Regenerative Fuel Cells: Renewable Energy Storage Devices Based on Neutral Water Input (open access)

Regenerative Fuel Cells: Renewable Energy Storage Devices Based on Neutral Water Input

GRIDS Project: Proton Energy Systems is developing an energy storage device that converts water to hydrogen fuel when excess electricity is available, and then uses hydrogen to generate electricity when energy is needed. The system includes an electrolyzer, which generates and separates hydrogen and oxygen for storage, and a fuel cell which converts the hydrogen and oxygen back to electricity. Traditional systems use acidic membranes, and require expensive materials including platinum and titanium for key parts of the system. In contrast, Proton Energy Systems’ new system will use an inexpensive alkaline membrane and will contain only inexpensive metals such as nickel and stainless steel. If successful, Proton Energy Systems’ system will have similar performance to today’s regenerative fuel cell systems at a fraction of the cost, and can be used to store electricity on the electric grid.
Date: September 1, 2010
Creator: unknown
System: The UNT Digital Library
Transistors for Electric Motor Drives: High-Performance GaN HEMT Modules for Agile Power Electronics (open access)

Transistors for Electric Motor Drives: High-Performance GaN HEMT Modules for Agile Power Electronics

ADEPT Project: Transphorm is developing transistors with gallium nitride (GaN) semiconductors that could be used to make cost-effective, high-performance power converters for a variety of applications, including electric motor drives which transmit power to a motor. A transistor acts like a switch, controlling the electrical energy that flows around an electrical circuit. Most transistors today use low-cost silicon semiconductors to conduct electrical energy, but silicon transistors don’t operate efficiently at high speeds and voltage levels. Transphorm is using GaN as a semiconductor material in its transistors because GaN performs better at higher voltages and frequencies, and it is more energy efficient than straight silicon. However, Transphorm is using inexpensive silicon as a base to help keep costs low. The company is also packaging its transistors with other electrical components that can operate quickly and efficiently at high power levels—increasing the overall efficiency of both the transistor and the entire motor drive.
Date: September 1, 2010
Creator: unknown
System: The UNT Digital Library
[First AIDS Memorial Riderless Horse] (open access)

[First AIDS Memorial Riderless Horse]

9 pages of "First AIDS Memorial Riderless Horse," a personal account by Marion Hayes about the horse, Jackson.
Date: September 1, 2013
Creator: Hayes, Marion
System: The UNT Digital Library
Utility-Scale Silicon Carbide Power Transistors: 15 kV SiC IGBT Power Modules for Grid Scale Power Conversion (open access)

Utility-Scale Silicon Carbide Power Transistors: 15 kV SiC IGBT Power Modules for Grid Scale Power Conversion

ADEPT Project: Cree is developing silicon carbide (SiC) power transistors that are 50% more energy efficient than traditional transistors. Transistors act like a switch, controlling the electrical energy that flows through an electrical circuit. Most power transistors today use silicon semiconductors to conduct electricity. However, transistors with SiC semiconductors operate at much higher temperatures, as well as higher voltage and power levels than their silicon counterparts. SiC-based transistors are also smaller and require less cooling than those made with traditional silicon power technology. Cree's SiC transistors will enable electrical circuits to handle higher power levels more efficiently, and they will result in much smaller and lighter electrical devices and power converters. Cree, an established leader in SiC technology, has already released a commercially available SiC transistor that can operate at up to 1,200 volts. The company has also demonstrated a utility-scale SiC transistor that operates at up to 15,000 volts.
Date: September 1, 2010
Creator: unknown
System: The UNT Digital Library
Semi-Solid Flowable Battery Electrodes: Semi-Solid Flow Cells for Automotive and Grid-Level Energy Storage (open access)

Semi-Solid Flowable Battery Electrodes: Semi-Solid Flow Cells for Automotive and Grid-Level Energy Storage

BEEST Project: Scientists at 24M are crossing a Li-Ion battery with a fuel cell to develop a semi-solid flow battery. This system relies on some of the same basic chemistry as a standard Li-Ion battery, but in a flow battery the energy storage material is held in external tanks, so storage capacity is not limited by the size of the battery itself. The design makes it easier to add storage capacity by simply increasing the size of the tanks and adding more paste. In addition, 24M's design also is able to extract more energy from the semi-solid paste than conventional Li-Ion batteries. This creates a cost-effective, energy-dense battery that can improve the driving range of EVs or be used to store energy on the electric grid.
Date: September 1, 2010
Creator: unknown
System: The UNT Digital Library
Oral History Interview with Ken Barhite, September 1, 2012 (open access)

Oral History Interview with Ken Barhite, September 1, 2012

The National Museum of the Pacific War presents an oral interview with Ken Barhite. Barhite was born in Alden, Iowa on 9 January 1921. Graduating from junior college, he was drafted into the Army and sent to Fort Wolters, Texas for thirteen weeks of basic training. He was then sent to Chenango, Pennsylvania for four weeks of advanced training prior to being sent to San Francisco where he boarded a liberty ship for a twenty-two day voyage to a replacement center in New Caledonia. After four weeks he was sent to Fiji where he joined the 23rd Infantry Division (Americal) in July 1943. The unit was sent to Bougainville where they performed patrols and were involved in some combat. He witnessed friends killed and wounded during these actions. While there, he was selected to attend 18 weeks of Officer’s Candidate School (OCS) in Australia. Upon his graduation in June 1945 he received his commission as a second lieutenant. He reported to the 158th Regimental Combat Team in Manila to prepare for the invasion of Japan. After the war, the unit boarded a ship for Japan as part of the occupation forces. Barhite returned to the United States in November 1945 …
Date: September 1, 2012
Creator: Barhite, Ken
System: The Portal to Texas History
Oral History Interview with Kenneth Spray, September 1, 2011 (open access)

Oral History Interview with Kenneth Spray, September 1, 2011

The National Museum of the Pacific War presents an oral interview with Kenneth Spray. Spray joined the Navy in 1943 and received basic training at Great Lakes. During sonar training, he developed a system to cheat the tests; however, on patrol in Florida he was the first to detect an enemy submarine. In 1944, he deployed to the Pacific aboard the USS Sierra (AD-18) and completed his shellback initiation just before a torpedo attack. In Manus, Spray worked around the clock repairing radar, sonar, and depth-finding equipment on numerous ships. He survived relentless kamikaze attacks while working on the USS Howard (DD-179) at Lingayen Gulf. In 1945, he received orders to Pearl Harbor for radar school. Experiencing engine trouble 400 miles out, the crew threw their personal belongings overboard to lighten the load. When the war ended, Spray was stationed on Guam for three months before being discharged. He earned a master's degree in material science and metallurgic engineering and enjoyed a lengthy career with the Clark Equipment Company.
Date: September 1, 2011
Creator: Spray, Kenneth
System: The Portal to Texas History
Oral History Interview with George S. Nelson, September 1, 2017 (open access)

Oral History Interview with George S. Nelson, September 1, 2017

The National Museum of the Pacific War presents an interview with George S Nelson. Nelson joined the Navy in December of 1942. He served as a machinist mate aboard a merchant ship. They traveled to New Caledonia and boarded the USS President Adams (APA-19), then headed to Guadalcanal. There they helped the Army and Marines unload food supplies. Then they headed to Tulagi, where Nelson took over as port director. He describes his job responsibilities as director. He participated in the Battle of Okinawa. He then served as Motor Machinist Mate aboard the USS YMS-429, sweeping mines off the coast of Kyushu. Nelson provides details of that experience. He was discharged in July of 1946. He rejoined the Navy in October of 1946 and retired as Chief Permanent Engineman 1970.
Date: September 1, 2017
Creator: Nelson, George S
System: The Portal to Texas History
Oral History Interview with Sarah Kay Dukote, September 1, 2015 (open access)

Oral History Interview with Sarah Kay Dukote, September 1, 2015

The National Museum of the Pacific War presents an interview with Sarah Kay Dukote. Dukote decided to become a neruse after having her appendix removed when she was a teenager. She finished high school in 1938 and went to nursing school in Kentucky, completing the course in September 1941. She joined the Army the day after he attack on Pearl Harbor. Her first assignment was at Fort Knox in the tuberculosis ward and the venereal disease ward. In late 1942, Dukote was transferred to a hospital in Hawaii at Schofield Barracks. She stayed there a few years and returned to the US just before the war ended. SHe opted for discharge when the war ended.
Date: September 1, 2015
Creator: Dukote, Sarah Kay
System: The Portal to Texas History
Transcription: Traditional story about Ruunu and the Squirrel by Farngam Shilshi (open access)

Transcription: Traditional story about Ruunu and the Squirrel by Farngam Shilshi

Transcription of a retelling of Ruunu leh theipaa paomin (The Story of Ruunuu and the Squirrel), as narrated by Farngam Shilshi. Ruunu collects figs in the forest and meets a squirrel, who asks for a ride in the fig basket. The squirrel eats all the figs, leaving only the skins, and Ruunu curses
Date: September 1, 2017
Creator: Lamkang Literature and Education Committee
System: The UNT Digital Library
Transcription: Traditional story about the Boy and the Tiger (open access)

Transcription: Traditional story about the Boy and the Tiger

Transcription of a retelling of Buurling le humpii paa paomin (the Story of the Boy and the Tiger), as narrated by Kangten Shakhila. The elder brother's wife tells her husband to kill his younger brother. At first he just pretends to do so, and then he abandons his younger brother in a tree. There the younger brother meets a tiger who wants to eat fruit from the tree. The boy offers to feed the tiger but stabs him instead. [INCOMPLETE.]
Date: September 1, 2017
Creator: Chelliah, Shobhana Lakshmi
System: The UNT Digital Library
Transcription: Traditional story about She-frog and He-tiger (open access)

Transcription: Traditional story about She-frog and He-tiger

Transcription of a retelling of Uitxok nuu le humpii paa paomin (the Story of She-frog and He-tiger), as narrated by Rengting Shilshi. Monkeys lead a tiger to a she-frog, who threatens to eat the tiger. The tiger proposes that the two of them race, and that the winner eat the other. The frog rides on the tiger's tail and jumps off at the end, beating the tiger. The tiger proposes that they vomit to see who has eaten more meat. The tiger asks how it is that the frog vomits tiger fur, and she claims it is from all the tigers she has eaten. Frightened, the tiger flees. The story is collected during the LLEC workshop at Mantripantha Village.
Date: September 1, 2017
Creator: Shilshi, Rengting & Khular, Sumshot
System: The UNT Digital Library
Correctional Officer Recruiting Flyer (open access)

Correctional Officer Recruiting Flyer

Flyer advertising availability for correctional officer positions, describing requirements, salary, and benefits of the position.
Date: September 1, 2014
Creator: Texas. Department of Criminal Justice.
System: The Portal to Texas History
DART's Gary Thomas Named Outstanding Public Transit Manager (open access)

DART's Gary Thomas Named Outstanding Public Transit Manager

News release about DART's president/executive director, Gary Thomas, being honored by the APTA as an outstanding public transportation manager.
Date: September 1, 2016
Creator: Lyons, Morgan & Ball, Mark
System: The Portal to Texas History
Texas SAR Chapter Officers Report: Sunday, September 1, 2019 (open access)

Texas SAR Chapter Officers Report: Sunday, September 1, 2019

Document containing a list of officers for each Texas Society, Sons of the American Revolution chapter. Personal information for each officer has been redacted.
Date: September 1, 2019
Creator: unknown
System: The UNT Digital Library
Lone Star Ink: Texas NDNP 2021 (open access)

Lone Star Ink: Texas NDNP 2021

Data management plan for the grant "Texas Digital Newspaper Project." This project includes the digitization of 100,000 pages of Texas newspapers dating from 1836 to 1922, as part of the state's participation in the National Digital Newspaper Program (NDNP). The University of North Texas plans to digitize and make available to Chronicling America 100,000 pages of historic Texas newspapers. The selected titles will reflect the political and economic history of the state; provide coverage for major regions of the state, including most major population areas; and have a broad chronological span. Additionally, titles selected during this project will focus on non-English newspapers important to the history of Texas which, for several reasons, have been overlooked and are underrepresented in national digital newspaper holdings. Pulling on the strengths and knowledge gained in previous years as an awardee, the UNT Libraries recognize the challenges involved in an undertaking of this scope and possesses the knowledge and management skills to achieve success.
Date: 2016-09-01/2023-08-31
Creator: Phillips, Mark Edward & Krahmer, Ana
System: The UNT Digital Library