Digital Commons Network^™

The Effects Of Switching Impulses On The Partial Discharge Activity And Breakdown Voltage Of 15 Kv Xlpe And Epr Cables, Jacob C (Jacob Curtis) Fulper

Theses and Dissertations

A growing trend in the electrical industry is to move away from overhead lines and towards underground distribution. The cables necessary for underground distribution are stressed in various ways, and one of the most ignored stresses is that of overvoltage caused by switching. The focus of this research is to determine the effects that high voltage switching impulses have on the electrical strength of medium voltage cable insulation. Accelerated aging was performed on multiple samples of XLPE and EPR cables by applying multitudes of switching impulses. At various stages of the aging process, partial discharge measurements were taken. At the …

Progress Toward The Total Synthesis Of Lyconadin A, Yu Zhang

Theses and Dissertations

Lyconadin A is a pentacyclic Lycopodium alkaloid isolated from the club moss Lycopodium complanatum with antitumor properties. We have developed a novel 7-exo/6-exo acyl radical cascade cyclization as a method of making the bicyclo[5.4.0]undecane ring system of lyconadin A. The model products are trans-fused ring systems, while a cis-fused ring system is needed in lyconadin A. We have discovered a method to convert the trans-fused model cascade cyclization product into the desired cis isomer. Based on Donohoe's pyridone synthesis, we developed a method for the construction of 5-alkyl and 3,5-dialkyl-6-carbomethoxy-2-pyridones, the former of which …

The Association Between Lead Exposure And Respiratory Health In Children, Colleen Coleman

Theses and Dissertations

Purpose: The substantial impact of indoor air quality and environmental hazards in the home on one’s health has long been recognized in the field of public health. This cross-sectional study investigates the risk between home based hazards, specifically lead, and respiratory health in children. The objective of this study is to examine the extent to which children testing positive for blood lead exposure are at an increased risk for having poor respiratory health. Methods: A nationally representative sample of 977 children ages 1- 6 years was obtained from the 2005-2006 National Health and Nutrition Examination Survey (NHANES). Information from the …

Flyer News, Vol. 57, No. 20 (Dec. 11, 2009), University Of Dayton

Flyer News

Student-run newspaper of the University of Dayton.

The Bg News December 11, 2009, Bowling Green State University

BG News (Student Newspaper)

The BGSU campus student newspaper. December 11, 2009. Volume 100-Issue 73.

Solar Technology Innovation Meeting Summary, Solar Innovation And Technology Center

Meetings (SI)

On December 11, 2009, Senator Harry Reid and President Neal Smatresk (UNLV) conveyed a group of approximately 60 people (see attached lists) from the public and private sector to provide input on the structure, focus, and need for a Solar Innovation Technology Center. At this meeting, there were small group discussions followed by a larger group discussion on the needs in the areas of Workforce / Training, Marketing and Finance, Economic and Policy Making, Infrastructure and Manufacturing, Technology Transfer and Commercialization, and Research. The notes below summarize the major comments from the group. This represents individual comments and in other …

Saving Energy In Network Hosts With An Application Layer Proxy: Design And Evaluation Of New Methods That Utilize Improved Bloom Filters, Miguel Jimeno

USF Tampa Graduate Theses and Dissertations

One of the most urgent challenges of the 21st century is to investigate new technologies that can enable a transition towards a society with a reduced CO₂ footprint. Information Technology generates about 2% of the global CO₂, which is comparable to the aviation industry. Being connected to the Internet requires active participation in responding to protocol messages. Billions of dollars worth of electricity every year are used to keep network hosts fully powered-on at all times only for the purpose of maintaining network presence. Most network hosts are idle most of the time, thus presenting a huge …

Modeling Of The Biomass Power Generation And Techno-Economic Analysis, Shireesha Methuku

Theses and Dissertations

Biomass is one of the renewable energy sources being used widely for power generation. This research work includes developing a comprehensive model for a biomass based power generation system as well as analyzing the technical, economical, and environmental impacts. The research objectives include modeling of the system, stability studies, and sensitivity analysis using MATLAB/Simulink. A mathematical model for the gas turbine has been developed and successfully interconnected with the distribution network. Transient stability of the power system has been carried out for four bus and six bus test case systems. Maximum rotor speed deviation, oscillation duration, rotor angle, and mechanical …

12/11/2009, Slutzker Center For International Students

Newsletters from Slutzker Center for International Services - SCIS News

No abstract provided.

Daily Eastern News: December 11, 2009, Eastern Illinois University

December

No abstract provided.

Soundings 2009-12, N/A N/A

Soundings

No abstract provided.

Pension Policy: The Search For Better Solutions, John A. Turner

Upjohn Press

Turner identifies the current problems facing pension policy for U.S. employer-provided pension plans and recommends solutions to those problems based on his examination of pension systems in other industrialized nations.

Analysis Of Electromagnetic And Seismic Geophysical Methods For Investigating Shallow Sub-Surface Hydrogeology, Eric M. Parks

Theses and Dissertations

An integrated electromagnetic (EM) and seismic geophysical study was performed to evaluate non-invasive approaches to estimate depth to shallow groundwater in arid environments with elevated soil salinity where the installation of piezometers would be impractical or prohibited. Both methods were tested in two study areas (semi-arid and arid respectively), one in Palmyra, Utah, USA near the shore of Utah Lake where groundwater is shallow and unconfined in relatively homogeneous lacustrine sediments. The other area is Carson Slough, Nevada, USA near Ash Meadows National Wildlife Refuge in Amargosa Valley. The area is underlain by valley fill, with generally variable shallow depths …

Fall Commencement Ceremonies, University Of North Florida

Commencement Printed Materials

Program for the Fall Commencement.

Novel Techniques For Selective Doping Of Silicon Carbide For Device Applications, Bharat Krishnan

Theses and Dissertations

Superior properties of Silicon Carbide (SiC), such as wide bandgap, high breakdown field and high thermal conductivity, have made it the frontrunner to replace Silicon for applications requiring high breakdown strength, mechanical and radiation hardness. Commercial SiC devices are already available, although their expected performance has not yet been realized due to a few problems related to device fabrication technologies, such as selective doping. This work explores non-traditional techniques for SiC doping (and selective doping in particular) based on previously unknown types of defect reactions in SiC and novel epitaxial growth techniques, which offer advantages over currently available technologies. Recent …

Parallel Viterbi Search For Continuous Speech Recognition On A Multi-Core Architecture, Naveen Parihar

Theses and Dissertations

State-of-the-art speech-recognition systems can successfully perform simple tasks in real-time on most computers, when the tasks are performed in controlled and noiseree environments. However, current algorithms and processors are not yet powerful enough for real-time large-vocabulary conversational speech recognition in noisy, real-world environments. Parallel processing can improve the real-time performance of speech recognition systems and increase their applicability, and developing an effective approach to parallelization is especially important given the recent trend toward multi-core processor design. In this dissertation, we introduce methods for parallelizing a single-pass across-word n-gram lexical-tree based Viterbi recognizer, which is the most popular architecture for Viterbi-based …

Partitioning And Interface Requirements Between System And Application Control For Power Electronic Converter Systems, Anil Kumar Kondabathini

Theses and Dissertations

Applications of power electronics in power systems are growing very rapidly and changing the power system infrastructure in terms of operation speed and control. Even though applications of power electronics are wide spread, the cost and reliability of power electronics are the issues that could hinder their penetration in the utility and industrial systems. The demand for efficient and reliable converter controllers gave rise to modularized converter and controller design. The objective of this dissertation is to determine the appropriate partitioning and interface requirements between the system and application control layers for power electronic converters so that the minimum set …

Implantable Antennas For Wireless Data Telemetry: Design, Simulation, And Measurement Techniques, Tutku Karacolak

Theses and Dissertations

Recent advances in electrical engineering have let the realization of small size electrical systems for in-body applications. Today’s hybrid implantable systems combine radio frequency and biosensor technologies. The biosensors are intended for wireless medical monitoring of the physiological parameters such as glucose, pressure, temperature etc. Enabling wireless communication with these biosensors is vital to allow continuous monitoring of the patients over a distance via radio frequency (RF) technology. Because the implantable antennas provide communication between the implanted device and the external environment, their efficient design is vital for overall system reliability. However, antenna design for implantable RF systems is a …

Information Processing System To Security Standard Compliance Measurement: A Quantitative Approach Using Pathfinder Networks (Pfnets), Elaine Hulitt

Theses and Dissertations

Continuously changing system configurations and attack methods make information system risk management using traditional methods a formidable task. Traditional qualitative approaches usually lack sufficient measurable detail on which to base confident, cost-effective decisions. Traditional quantitative approaches are burdened with the requirement to collect an abundance of detailed asset value and historical incident data and to apply complex calculations to measure the data precisely in work environments where there are limited resources to collect and process it. To ensure that safeguards (controls) are implemented to protect against a majority of known threats, industry leaders are requiring information processing systems to comply …

Small Signal And Transient Stability Analysis Of Mvdc Shipboard Power System, Seetharama Raju Rudraraju

Theses and Dissertations

Recent developments in high power rated Voltage Source Converters (VSCs) have resulted in their successful application in Multi-Terminal HVDC (MTDC) transmission systems and also have potential in the Medium Voltage DC (MVDC) distribution systems. This work presents the findings of stability studies carried out on a zonal MVDC architecture for the shipboard power distribution system. The stability study is confined to rotor angle stability of the power system, i.e. the transient and small signal stability analysis. The MTDC ring structure similar to MVDC shipboard power system was implemented in MATLAB/Simulink to look at the transient behavior of the MVDC system. …

Verification Of A Three-Dimensional Statics Model For Continuum Robotics And The Design And Construction Of A Small Continuum Robot (Scr), Ricky (Ricky Lee) Gray

Theses and Dissertations

Continuum robots are biologically inspired robots that capture the extraordinary abilities of biological structures such as elephant trunks, octopus tentacles, and mamma-lian tongues. They are given the term continuum robots due to their ability to bend conti-nuously rather than at specific joints such as with traditional rigid link robots. They are used in applications such as search and rescue operations, nuclear reactor repairs, colo-noscopies, minimal invasive surgeries, and steerable needles. In this thesis, a model that predicts the shape of a continuum robot is presented and verified. A verification system to verify the validity and accuracy of the model is …

Real Time Modeling, Simulation And Validation Of Protective Relays, Ankush Saran

Theses and Dissertations

The protection system plays an important role in the power system to detect the fault, isolate the faulted zone from the unaulted zone and restore the power supply to the healthy part. In order to validate the developed protection system, hardware in the loop (HIL) tests have been performed on several power system test cases using commercial overcurrent and distance relays from two vendors and a Real Time Digital Simulator (RTDS). Two-bus and eight-bus terrestrial power systems (TPS) as well as a 4-bus shipboard power system (SPS) are developed in RSCAD and used as power system test cases. The simulation …

Statutory Instrument: Credit Institutions Scheme (Eligible Liabilities Guarantee), Brian Lenihan, Patrick Honohan

Documents

Section 6(4) of the Credit Institutions (Financial Support) Act 2008

Clinical Profile, Outcomes And Improvement In Symptoms And Productivity In Rhinitic Patients In Karachi, Pakistan., Taimur Saleem, Umair Khalid, Ubaid Ur Rehman Sherwani, Shehzad Ghaffar

Section of Otolaryngology, Head & Neck Surgery

Background:Rhinitis can cause a heavy toll on Patients because of its bothersome effects on productivity. This retrospective study was conducted to explore the clinical profile, outcomes and improvement in the symptoms and productivity resulting from treatment of allergic rhinitis in Pakistan.

Methods:

We carried out a retrospective file review of all allergic rhinitis Patients who presented to the Ear, Nose, Throat Consulting Clinic from January, 2006 to June, 2008 using a structured proforma especially designed for this Purpose. Data was entered and analyzed using SPSS v. 16.0.

Results:

The charts of 169 Patients were reviewed. The mean age of …

The New Hampshire, Vol. 99 [100], No. 26 (Dec. 11, 2009), The New Hampshire

The New Hampshire Print Edition

An independent student produced newspaper from the University of New Hampshire. This volume was printed as 99, but it is the 100th volume in the series. This was corrected in pencil.

Synthesis Of Local Thermo-Physical Models Using Genetic Programming, Ying Zhang

USF Tampa Graduate Theses and Dissertations

Local thermodynamic models are practical alternatives to computationally expensive rigorous models that involve implicit computational procedures and often complement them to accelerate computation for real-time optimization and control. Human-centered strategies for development of these models are based on approximation of theoretical models. Genetic Programming (GP) system can extract knowledge from the given data in the form of symbolic expressions. This research describes a fully data driven automatic self-evolving algorithm that builds appropriate approximating formulae for local models using genetic programming. No a-priori information on the type of mixture (ideal/non ideal etc.) or assumptions are necessary.

The approach involves synthesis of …

Mobile Computing And Sensor Web Services For Coastal Buoys, Santhosh Kumar Amanchi Rajender

Theses and Dissertations

Mobile device technology with the influence of the Internet is creating a lot of Webbased services so that people can have easy and 24-hour access to the services. Recently, the Google’s Android has revolutionized applications development for the mobile platform. As there is an increasing number of companies exposing their services as Web services, enabling flexible mobile access to distributed Web resources is a relevant challenge. However, the current Web is a collection of human readable pages that are unintelligible to computer programs. Semantic Web and Web services have the potential of overcoming this limitation. For this, a standard ontology …

The Beacon - Vol 8 No. 7 - December 11, 2009, Merrimack College

The Beacon

The Beacon - the student newspaper of Merrimack College. Volume 8, Number 7 - December 11, 2009. 12 pages

Challenges Predicting Ligand-Receptor Interactions Of Promiscuous Proteins: The Nuclear Receptor Pxr., Sean Ekins, Sandhya Kortagere, Manisha Iyer, Erica J. Reschly, Markus A. Lill, Matthew R. Redinbo, Matthew D. Krasowski

Borch Department of Medicinal Chemistry and Molecular Pharmacology Faculty Publications

Transcriptional regulation of some genes involved in xenobiotic detoxification and apoptosis is performed via the human pregnane X receptor (PXR) which in turn is activated by structurally diverse agonists including steroid hormones. Activation of PXR has the potential to initiate adverse effects, altering drug pharmacokinetics or perturbing physiological processes. Reliable computational prediction of PXR agonists would be valuable for pharmaceutical and toxicological research. There has been limited success with structure-based modeling approaches to predict human PXR activators. Slightly better success has been achieved with ligand-based modeling methods including quantitative structure-activity relationship (QSAR) analysis, pharmacophore modeling and machine learning. In this …

The Importance Of Soft Skills In The Workplace As Perceived By Community College Instructors And Industries, Laura Suzanne Tribble

Theses and Dissertations

Soft skills include communication skills, problem-solving skills, conflict resolution, working well with other people, and ensuring customer satisfaction. Employers need employees who have adequate technical skills but who also have soft skills. There is limited information about the perceptions of which soft skills are needed in the workplace. This study attempted to close the gap in the literature concerning the perceptions of instructors and employers in the area of soft skills in the workplace. For this study, the Soft Skills Survey for Instructors and Employers was used to gather the perceptions of information technology instructors and employers in five community …