Fuse holder damage investigation

The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file.Title from title screen of research.pdf file (viewed on August 29, 2007)Includes bibliographical references.Thesis (M.S.) University of Missouri-Columbia 2006.Dissertations, Academic -- University of Missouri--Columbia -- Electrical engineering.The explosion of fuse holders at a certain 161 kV: 34.5 kV Ameren UE substation in the Potosi area was investigated. The Alternative Transients Program -Electromagnetic Transients Program (ATP-EMTP) was used to model and simulate the electrical behavior of transient overcurrents and overvoltages created by switching events in an effort to identify the cause of damage to a certain fuse holder used to protect the 4.5 MVAR capacitor bank on the 34.5 kV side of the transformer. Simulation results indicated that switching can increase the peak of the transient overcurrent from the normal current operation by up to9.33 p.u. Thus, the switching phenomenon may play a role in fuse holder damage

Composite-semiconductor-based micro power source

Title from PDF of title page (University of Missouri--Columbia, viewed on July 30, 2013).The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file.Dissertation advisor: Dr. Jae Wan KwonIncludes bibliographical references.Vita.Ph. D. University of Missouri--Columbia 2012."July 2012"This work covers the development of a radioisotope loaded micropower source from the initial stages of design, simulation and fabrication through the characterization and performance optimization of the device. Various mechanisms causing losses in conventional betavoltaic conversion were investigated. A new betavoltaic device was introduced that shows efficiency improvement over traditional betavoltaics through the use of a semiconductor infused with a beta source. Specifically, radioactive material sulfur (35S) was blended with a semiconductor material (selenium), effectively encapsulating the radioisotope within the semiconductor. By eliminating or reducing potential loss factors by optimizing the device geometry, fabrication techniques, and other factors, more efficient energy conversion was achieved. This approach enabled more effective conversion of energy emitted from the radioisotope without the need for additional shielding structures. The prototype devices (first and second generation) were fabricated and tested with current-voltage measurement at room temperature. A maximum output power of 687 nW was obtained from the micro power source using 1.24 GBq (33.61 mCi) of 35S. An open-circuit voltage of 410 mV and short-circuit current of 6.44 A were also observed. The overall efficiency of the prototype device was 7.05 %. This is a distinct improvement over traditional betavoltaic sources, whose maximum efficiencies are around 2.7%.Includes bibliographical reference

A STUDY OF THE FOURIER-ANALYSIS METHOD OF OBTAINING ELECTROMAGNETIC FIELDFROM A GIVEN CURRENT DISTRIBUTION

Abstract not availabl

Radioisotope micorbattery [sic] based on liquid semiconductors [abstract]

The solid state semiconductors in state of the art betavoltaic micro batteries result in poor coupling between the rectified junction and the semiconductor junction and degradation of the conversion device, which has been the major challenge of commercializing betavoltaic micro batteries. This invention reports a novel technique using liquid semiconductors for a microbattery based on MEMS technology. The specially designed microbattery is provided with high efficiency and a long life time. Potential Areas of Applications: * Any field that requires a reliable small power source with a long life * Particularly well suited for powering sensors in inaccessible environments * Micro electro mechanical systems (MEMS) such as: o Thermal, magnetic and optical sensors and actuators o Micro chemical analysis systems o Wireless communication systems o Biomedical devices * Normal and extreme environments Patent Status: Non provisional patent application on file Inventor(s): Jae W. Kwon, Tongtawee Wacharasin Contact Info: Dr. Wayne McDaniel, Ph.D. ; [email protected] ; 573-884-330

TSH-Secreting Pituitary Macroadenoma in a Girl with Lingual Thyroid

Patients with long-standing hypothyroid are, in some cases, reported to develop pituitary gland hyperplasia due to loss of feedback inhibition of thyroxine in hypothalamus—the condition of which typically regresses after thyroxine replacement. Herein, a 15-year-old girl—with long-standing untreated lingual hypothyroid—presents with a pathologically proven TSH pituitary macroadenoma and bilateral large ovarian cysts. Although MR imaging may differentiate between hyperplasia and macroadenoma of the pituitary gland, pathological examination is still a cornerstone to correct diagnosis

DKA with Severe Hypertriglyceridemia and Cerebral Edema in an Adolescent Boy: A Case Study and Review of the Literature

A 13-year-old adolescent boy with type 1 diabetes mellitus (1b) presented with diabetic ketoacidosis (DKA) and cerebral edema. Grossly lipemic serum and lipemia retinals due to extremely high triglyceride (TG) level were observed without evidence of xanthoma or xanthelasma. Cerebral edema was treated by appropriate ventilation and mannitol administration. Normal saline was carefully given and regular insulin was titrated according to blood sugar levels. Triglyceride levels were reduced from 9,800 mg/dL to normal range within 9 days after conventional treatment was commenced without antilipid medication. Based on our review of the literature, this is the first reported case of confirmed pediatric DKA with severe hypertriglyceridemia and cerebral edema. In patients with DKA and hypertriglyceridemia, clinicians should be mindful of the possibility of associated acute pancreatitis and cerebral edema

Synthesis, Characterization and Biological Evaluation of Succinate Prodrugs of Curcuminoids for Colon Cancer Treatment

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