Digital Commons Network^™

Closed Form Solution Of The Wave Equation For Piles, Don C. Warrington

Masters Theses and Doctoral Dissertations

This thesis details the research into the one-dimensional wave equation as applied to piles used in the support of structures for civil works and driven using impact equipment. Since the 1950's, numerical methods, both finite difference and finite element, have been used extensively for the analysis of piles during driving and are the most accepted method of analysis for the determination of driving stresses, dynamic and static resistance of piles. In this thesis the wave equation is solved in a relatively simple closed form without recourse to numerical methods. A review of past efforts to solve the wave equation in …

University Of Central Florida Undergraduate Catalog, 1997 - 1998, University Of Central Florida

UCF Catalogs

No abstract provided.

Factors Affecting Use Of E-Mail By Public School Principals Of The Central Appalachian Region, Micheal T. Carter

Electronic Theses and Dissertations

The purposes of this study were to determine the factors that influence the use of e-mail by principals, the purposes for which e-mail messages were sent and received, and the impact of experience and training in the areas of computers and e-mail. A survey was sent to a stratified random sample of 620 elementary, middle/junior high, and high school principals of the Central Appalachian Region. Respondents were asked to provide data regarding demographics, accessibility to hardware and software, computer and e-mail experience and training, uses of e-mail, and items that influence e-mail use. Eleven research questions and 10 hypotheses were …

Single Row Routing: Theoretical And Experimental Performance Evaluation, And New Heuristic Development, David A. Hysom

Computer Science Theses & Dissertations

The Single Row Routing Problem (SRRP) is an abstraction arising from real-world multilayer routing concerns. While NP-Complete, development of efficient SRRP routing heuristics are of vital concern to VLSI design. Previously, researchers have introduced various heuristics for SRRP; however, a comprehensive examination of SRRP behavior has been lacking.

We are particularly concerned with the street-congestion minimization constraint, which is agreed to be the constraint of greatest interest to industry. Several theorems stating lower bounds on street congestion are known. We show that these bounds are not tight in general, and argue they may be in error by at least 50% …

Advanced Brushless Spindle Motors In Computer Hard Disk Drives, Bao Trinh

Master's Projects

The trend of increasing storage capacity and decreasing form factor is still a key challenge in hard disk drive (HDD) development. The next generation models of high performance hard drives will require spindle motors of higher speed with low cogging torque and ripples to reduce vibration and be able to pack more data tracks. The main causes of vibration in the spindle motor, which results in acoustic noise in the drive are the defects of rolling ball bearing and magnet-pole/stator-slot configurations. This thesis project focuses on the slotless stator and non-contact bearing in the spindle motor. Some fundamental aspects of …

Nickel Doping Of Boron–Carbon Alloy Films And Corresponding Fermi Level Shifts, Seong-Don Hwang, N. Remmes, Peter A. Dowben, D.N. Mcilroy

Peter Dowben Publications

We have grown nickel doped boron–carbon alloy films by the technique of plasma enhanced chemical vapor deposition. The source gas closo-1,2-dicarbadodecaborane (orthocarborane) was used to grow the boron–carbon alloy, while nickelocene [Ni(C₅H₅)₂] was used as the dopant source for nickel. With sufficient levels of Ni doping, diodes with characteristic tunnel diode behavior can be fabricated. The doping of nickel transformed a B₅C p-type material, relative to lightly doped n-type silicon, to a strongly n-type material. In order to gain insight into the shift of the Fermi level of the …

Application Of Intelligent Agent Techniques In Manufacturing Integration, Prithish Negi

Master's Projects

This project presents an object-oriented model for manufacturing integration utilizing Intelligent Agent techniques. The integration requirements are determined by increasing productivity, flexibility and quality demand. The model is based on the concept of Intelligent agents supporting various activities. The complex manufacturing functions are broken down into elemental tasks. An agent then automates the task. An Intelligent Agent is an autonomous software program that can operate independently and usually remotely. Agents can communicate with each other, human beings, machines and other resources such as databases. The use of standardized means of communication through widely accepted protocols is recommended. Agents have been …

Study On The Parasites Of Falcons In The United Arab Emirates, Mohammad Ismail M. A Sultan Al-Ulama

Theses

Sakers Falco cherrug, Gyrfalcons Falco rusticolus, Peregrines Falco peregrilllls, in addition to Hybrids (saker X gyrfalcon, or gyrfalcon X peregrine), were found to be the most popular species of falcons in United Arab Emirates (UAE).

The importance of falcons and falconry in Arabia was highlighted with a brief history of falconry in Arabia.

The study focused on the prevalence of intestinal parasites (coccidia, helminthes and nematodes) and blood parasites (Haemoproteus sp. and Leucocytozoon sp.) as well as ecto-parasites (Ticks and Mites) of these falcons, with discussion on the possible sources of infection in view of the …

Computerized Brainstorming And Decision Making, Virginia Louise Collins

Student Work

Abstract Computers are widely used in business and industry toda y and are frequently considered essential to efficient job performance. A great deal of research has been generated over the past decade regarding computer use in the work place. However, research has lagged regarding computer technology and group performance. The purpose of this study is to determine empirically if there are enhancements in the performance of groups and individuals when they use a computer to facilitate the problem solving process. It is hypothesized that the quality of solutions generated to a complex problem will be a function of the interaction …

Predicting Resistance And Stability Of Vegetation In Floodplains, David E. Werth Jr.

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

To calculate flow or depth in a waterway, it is necessary to accurately determine the flow resistance. Past research has made considerable progress in predicting the roughness of nonvegetated uniform channels based on both theoretical and experimental investigations. However, to determine the flow resistance associated with vegetated compound flow channels and floodplains, the effects of the vegetation must be considered.

Recent advancements have led to greater understanding of the effects of partially submerged uniform vegetation in a waterway. However, to accurately determine flow resistance, it is imperative that the effects of both submerged and partially submerged vegetation be taken into …

Evaluation Of Methods Used In Meat Iron Analyses And Iron Content Of Raw, Cooked, And Cured Meats, Eldred Merlyn Clark

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This research project was divided into three parts. In the first part, heme, nonheme, and total iron methodologies for meats were evaluated. The accuracy, precision, and specificity of each method were determined by spike recoveries of heme and nonheme iron, and by analysis of National Institute of Science and Technology standard reference materials. The most reliable and practical methods were then used to determine the total, nonheme, and heme iron contents of various meats before and after cooking. The meats analyzed were beef, pork, lamb, chicken, and turkey. The wet-ashing technique was a novel procedure in which nitric acid was …

Modelling Vegetation Cover Types Using Multiseasonal Remotely Sensed Data To Compare Ecotones At Multiple Spatial And Spectral Resolutions, Kimberly Patraw

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Army National Guard Bureau has implemented a cooperative project with Utah State University to help with the use, display, and evaluation of environmental data for maintaining land condition. Camp Grayling, Michigan, is comprised of deciduous and evergreen forest types. Use of remote sensing for classification has been limited in this region due to the difficulty of species-level classification using single-date remote-sensing techniques. Also, remote sensing has traditionally focused on mapping homogenous zones rather than vegetation boundaries, while one of the concerns for land managers is the nature of vegetation edges (ecotones).

This study analyzed each season and band from …

A Slow-Release Nitrogen Fertilizer: Ammonium-Loaded Clinoptilolite, T. Scott Perrin

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Crops grown in sandy soils require frequent irrigation. As a result, nitrogen (N) fertilizers. such as ammonium sulfate((NH₄)₂SO₄), are leached from the rooting zone of crops. This loss of N increases N fertilizer use and the potential for nitrate (NO₃^-) contamination of water. Ammonium-loaded clinoptilolite (NH₄⁺-Cp) may reduce this N leaching, increase N fertilizer use-efficiency, and prevent NO₃- contamination of water while sustaining normal crop growth.

The potential of NH₄⁺-Cp as a N fertilizer was assessed in three leaching experiments without plants and …

Binding Of Cobalt (Iii) To Nucleic Acids Via Reaction With [Co(Nh3)5(Oh2)]3+, David M. Calderone

Seton Hall University Dissertations and Theses (ETDs)

No abstract provided.

The Pacifican, May 1,1997, University Of The Pacific

All Issues - Student Newspaper, The Pacifican, Pacific Weekly

No abstract provided.

Pittsburg State University Annual Commencement, May 1997, Pittsburg State University

Commencement, 1903-Present

Program of undergraduate and graduate commencement exercises at Pittsburg State University on May of 1997

Uptake And Metabolism Of Atrazine By Poplar Trees, Joel Gerard Burken, Jerald L. Schnoor

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Hybrid Poplar Trees Can Uptake, Hydrolyze, and Dealkylate Atrazine to Less Toxic Metabolites. in Whole Plant Studies, the Parent Compound Atrazine and 14C Ring-Labeled Metabolites Were Extracted from Poplar Tissues and Analyzed Via High-Pressure Liquid Chromatography (HPLC) with UV and Radiochromatographic Detectors in Series. the Concurrent Separation and Identification of These Metabolites Has Not Been Previously Reported in Higher Plants for Phytoremediation Applications. Unidentified Metabolites Were Also Detected. Metabolism of Atrazine Occurred in Poplar Roots, Stems, and Leaves and Became More Complete with Increased Residence Time in Tissues. in Poplar Cuttings Exposed to Atrazine for 50 Days, the Parent Compound …

Happenings Special Addition, State University Of New York At Stony Brook

Happenings

v. : ill. ; 41 cm (original analog pub.),News for and about the University at Stony Brook campus community

Xenon Isotope Record Of Nucleosynthesis And The Early Solar System, Jauh-Tzuoh Lee, Bin Li, Oliver Manuel

Chemistry Faculty Research & Creative Works

No abstract provided.

1997 May, Office Of Communications & Marketing, Morehead State University.

Morehead State Press Release Archive, 1961 to the Present

Morehead State University press releases for May of 1997.

An Investigation And Evaluation Of Promela/Spin As A Validation Tool For Asynchronous Concurrent Systems, Mark Bezdany

Theses

Historically, the consequences of implementing faulty designs of concurrent/ distributed systems have been well known. There have many documented occasions where the little-known and unaccounted-for situations have caused the loss of human life and limb. This problem can be generalized, nowadays, to systems termed as mission critical. This term has arisen because individuals, businesses, and governments have come to depend on their correct operation. Failures in these systems can have such an adverse impact, that they are simply unacceptable. Although, due to the inherent complexity of these systems, preventing such failures can prove to be a very difficult task. PROMELA/SPIN …

In Situ Observations Of Air Traffic Emission Signatures In The North Atlantic Flight Corridor, Hans Schlager, Paul Konopka, P. Schulte, U. Schumann, H. Ziereis, F. Arnold, M. Klemm, Donald E. Hagen, Philip D. Whitefield, J. Ovarlez

Physics Faculty Research & Creative Works

Focussed aircraft measurements have been carried out over the eastern North Atlantic to search for signals of air traffic emissions in the flight corridor region. Observations include NO, NO₂, HNO₃, SO₂, O₃, H₂O, total condensation nuclei (CN), and meteorological parameters. A flight pattern with constant-altitude north-south legs across the major North Atlantic air traffic tracks was flown. Signatures of air traffic emissions were clearly detected for NO_x, SO₂, and CN with peak concentrations of 2 ppbv, 0.25 ppbv, and 500 cm^-3, respectively, exceeding background …

A Measurement Of Rb Using Mutually Exclusive Tags, R. Barate, Manoj Thulasidas

Research Collection School Of Computing and Information Systems

A measurement of Rb using ve mutually exclusive hemisphere tags has been performed by ALEPH using the full LEP1 statistics. Three tags are designed to select the decay of the Z0 to b quarks, while the remaining two select Z0 decays to c and light quarks, and are used to measure the tagging eciencies. The result, Rb = 0:2159 0:0009(stat) 0:0011(syst), is in agreement with the electroweak theory prediction of 0:21580:0003.

Source-Aware Multidatabase Query Processing, Ee Peng Lim, Yinyan Cao, Roger Hsiang-Li Chiang

Research Collection School Of Computing and Information Systems

We introduce a multidatabase model to represent the information that derives from different local databases. This model, known as Tuple-Source (TS) relational model, accommodates tuples from different local databases by attaching them with their source information in the global relations which are also known as TS-relations. In other words, a source attribute is implicit in every TS-relation. To manipulate the global relations, we have developed the TSSQL query language and implemented a distributed query processor to process such queries. In this paper, we report our distributed query processing architecture and algorithms. Our architecture consists of a query mediator and a …

Post-Middle Miocene Geologic History Of The Tualatin Basin, Oregon With Hydrogeologic Implications, Doyle Coley Wilson

Dissertations and Theses

The geologic history and sedimentary till of the Tualatin Basin after Columbia River Basalt Group (CRBG) emplacement is assessed and related to groundwater characteristics. The 334 m deep HBD-1 core from the Hillsboro Airport, provides the primary information for sediment characterization and is supported by over 2400 well logs and cores, and four seismic lines. The sedimentary section above the 26 m thick paleosol on the CRBG in HBD-I is divided into two main groups: a 25 m thick section of Missoula flood sediments called the Willamette Silt overlies a 263 m thick finegrained sequence of fluvial Neogene sediments.

Pollen, …

Geochemical Characteristics And Correlations Within The Triassic-Jurassic Age Gabbs And Sunrise Formations Of West Central Nevada, Karen Elizabeth Boelling

Dissertations and Theses

Trace and minor element geochemistry was determined using Instrumental Neutron Activation Analysis for ninety-six (96) limestone and calcareous siltstone samples from four stratigraphic sections in the Triassic-Jurassic age Gabbs and Sunrise formations of west central Nevada. Geochemical data support lithologic and faunal interpretations of relative basin positions of the Sunrise Formation stratigraphic sections, as well as basin development (including transgressive­-regressive sequences) during deposition of the Gabbs and Sunrise formations at New York Canyon (Gabbs Valley Range). All sections show characteristics of both oceanic and continental island arc sources. Rare positive Eu anomalies relative to chondrites suggest that the Gabbs Formation …

Predictable File Access Latency For Multimedia, Dan Revel, Crispin Cowan, Dylan Mcnamee, Calton Pu, Jonathan Walpole

Computer Science Faculty Publications and Presentations

Multimedia applications are sensitive to I/O latency and jitter when accessing data in secondary storage. Transparent adaptive prefetching (TAP) uses software feedback to provide multimedia applications with file system quality of service (QoS) guarantees. We are investigating how QoS requirements can be communicated and how they can be met by adaptive resource management. A preliminary test of adaptive prefetching is presented.

Middle School Language-Related Risk Indicators Of A High School Dropout, Joan M. Shaw

Theses and Dissertations

No abstract provided.

Male Involvement In Early Intervention For Young Children With Special Needs Both In Home And Inclusive School Settings, Cheryl Leigh Anderson

Theses and Dissertations

No abstract provided.

Service Learning In The North Dakota Middle School Bridges Project, Theresa Kathryn Weigel

Theses and Dissertations

No abstract provided.