Digital Commons Network^™

A Reversible Three-Phase Step Up/Down Switching Mode Rectifier, Jenn-Jong Shieh

Journal of Marine Science and Technology–Taiwan

In this paper, focus on the null space vector duty cycle control, a reversible three-phase step up/down switching mode rectifier is proposed attain clean sinusoidal input current, unity power factor, bidirectional power flow, step up/down output DC voltage and insensitivity for a voltage input. In addition, a precise simulation model is proposed to simulation by using PC software tools. Finally, some simulation and experimental results are presented for verification.

Mathematical Modeling And Prediction Method Of Concrete Carbonation And Its Applications, Ming Te Liang, Wenjun Qu, Chih-Hsin Liang

Journal of Marine Science and Technology–Taiwan

The carbonation process of concrete is principally a diffusion phenomenon. The penetration rate of carbon dioxide depends mainly on the concrete quality and the exposure condition. Based on both Fick’s first and second laws of linear diffusion equations, the threedimensional equation of conservation of mass is expressed. This equation can be reduced to two- and one- dimensional equations of conservation of mass which can predict the carbonation depth beneath corners and the general surface of concrete structures, respectively. The objectives of this investigation are to measure the depth of carbonation from the free surface of a concrete member and to …

On The Permeability Inside The Granular Media, Chen-Yuan Chen, Chung-Pan Lee, Cheng-Wu Chen

Journal of Marine Science and Technology–Taiwan

The permeability and resistance characteristics in porous structures with different grain size and shape have been studied experimentally in the paper. Two materials used in the study are crushed gravels and spherical glass balls with four sizes of 5.2 mm, 7. 4 mm, 12.2 mm, and 31.7 mm for gravels and 13.0 mm, 16.0 mm, 25. 0 mm, and 35.0 mm for balls, respectively. The permeability determined from linear Darcy Law shows a strong dependence on flow velocity in addition to grain sizes and shapes. This is not consistent to the traditional definition of permeability that is only a function …

Monitoring Of Sandstorms With Rocsat-1 Oci Data, Shih-Jen Huang, Gin-Rong Liu, Tsung-Hua Kuo, Tang-Huang Lin, Chih-Kang Liang

Journal of Marine Science and Technology–Taiwan

The Ocean Color Imager (OCI) onboard the ROCSAT-1 Satellite was employed to demonstrate its capability in monitoring sandstorm events around Mongolia and northwestern China where they have been occurring in great frequency over these past few years. The OCI measures the radiance from the visible to near infrared regions in six spectral channels. The radiance can be used to calculate the aerosol optical depth (AOD) of the atmosphere through an atmospheric correction algorithm. The variation in the AOD during January and February of 2001 is investigated in this study. A set of OCI images covering the Yellow Sea was selected …

Feline Immunodeficiency Virus Integration In B-Cell Lymphoma Identifies A Candidate Tumor Suppressor Gene On Human Chromosome 15q151, Julia Beatty, Anne Terry, Julie Macdonald, Elizabeth Gault, Stanley Cevario, Stephen J. O'Brien, Ewan Cameron, James C. Neil

Biology Faculty Articles

Infection with immunosuppressive lentiviruses is associated with increased cancer risk,but most studies have implicated indirect mechanisms as the tumor cells generally lack integrated viral sequences.An exception wasfound in a B-cell lymphoma (Q254) where the tumor cells contained a single integrated feline immunodeficiency virus genome. Additional analysis now indicates that feline immunodeficiency virus integration in lymphoma Q254 resulted in promoter insertion and truncation of a conserved gene on feline chromosome B3, whereas the unaffected allele of the gene appeared to be transcriptionally down-regulated. The orthologous human gene (FLJ12973), is expressed ubiquitously and encodes a WD-repeat protein with structural similarity …

Experimental Nonlinear Modeling Of A Rotating Machine With An Oil Film Bearing, Chiou-Fong Chung, Pi-Cheng Tung, Chiang-Nan Chang

Journal of Marine Science and Technology–Taiwan

In this study the system identification method is applied to obtain a nonlinear equation for an oil film rotating system. The centrifugal force induced by an unbalanced mass is used as the input signal for identification, and the phase between the input signal and the measured output vibration amplitude is calculated to perform the identification. Stability analysis and system performance are evaluated by using the root locus and the Floquet-Liapunov theorem. Based on the model, the oil whirl of the journal bearing can be predicted. A comparison between the simulation results and some experimented data shows the feasibility of the …

Riding The Active Learning Wave: Using Problem-Based Learning As A Catalyst For Creating Faculty-Librarian Partnerships, Michael Fosmire, Alexius Macklin

Libraries Research Publications

With higher education shifting its emphasis from teaching to learning and inputs to outcomes, active learning techniques are gaining prominence. Research has shown that students learn better when they actively engage the course content, rather than passively absorb lecture material. However, many faculty are unsure of how to take advantage of these new techniques to improve the learning outcomes for their students. For one active learning technique, problem-based learning, librarians are well positioned to facilitate its adoption into course curriculum. In order to effect a high-quality problem-based learning experience, a true collaboration of efforts needs to take place between the …

South Dakota State University Graduation Exercises, December 14, 2002, Brookings, South Dakota, South Dakota State University

Commencement Programs

Please be advised that the names listed in the program do not constitute official confirmation of meeting the graduation requirements. The 2002 Graduation Exercises at South Dakota State University will commence with an introduction by University President Peggy Gordon Miller. Serving as honorary marshals for the occasion are Lowell Amiotte, Associate Professor Emeritus of Education and Counseling and Coordinator of American Indian Activities, along with Dr. Mary Ellen Aamot, Professor Emerita of Cooperative Extension Service. Delivering the graduation address titled "Remember the Future" will be Dr. Allen Branum, Professor Emeritus of Psychology and Acting Director of Diversity Enhancement. Dr. Carol …

Fall Commencement Program, December 14, 2002, Coastal Carolina University

Commencement Programs

Program of Commencement Exercises at Coastal Carolina University.

2002 Academic Hooding Ceremony For Juris Doctor Graduates, Nova Southeastern University

NSU Commencement Programs

No abstract provided.

Ua45/6 Commencement Program, Wku Registrar

WKU Administration Documents

Commencement program listing graduates.

Desired Characteristics Of Ethical Leaders In Business, Educational, Political And Religious Organizations From East Tennessee: A Delphi Investigation., Jeff Moorhouse

Electronic Theses and Dissertations

Leadership is the moving of people towards specified goals. Leaders come in all shapes and sizes. The leadership dynamic of human interaction is one of the most studied and least understood phenomena. More attention is currently being given to the ethics of leadership in light of recent situations involving misconduct in the White House, illeagal accounting practices amoung top corporations, and misuse of power in religous organizations.

In this study, I sought to identify and prioritize characteristics of ehtical leadership with the assistance of leaders in four distinct groups; the business, religious, political, and educational communities within a six county …

Determining Standards For Sources Of Free Information On The Internet For Inclusion In Academic Library Holdings By 2010., Doug D. Cross

Electronic Theses and Dissertations

The purpose of this study was to develop a consensus from a panel of experts composed of library deans/directors, reference librarians, and instructors with online teaching experience. The panel developed the methodology necessary for evaluating free sources of information on the Internet for inclusion in academic library holdings by the year 2010. The following areas were explored as they related to the forecast: 1) The changes in higher education institutions that will be necessary to prepare students to deal with free sources of information on the Internet; 2) The procedures that librarians need to develop and implement to ensure that …

Commencement Convocation Exercises - December 2002, Prairie View A&M University

Commencement and Convocation Exercises

No abstract provided.

2002-12-14 Minutes And Appendicies, Longwood University

Board of Visitors Meeting Minutes 1964-

No abstract provided.

Depth-Varying Constitutive Properties Observed In An Isothermal Glacier, H. P. Marshall, Joel T. Harper, W. Tad Pfeffer, Neil Humphrey

Geosciences Faculty Publications

Detailed three-dimensional in-situ measurements of deformation at depth are used to examine the rheology of a 6 x 10⁶ m³ block of temperate glacier ice. Assuming that the viscosity of this ice is primarily dependent on stress, the relationship between inferred stress and measurements of strain-rate above about 115 m depth suggest a constitutive relationship with a stress exponent n about 1. Deformation below 115 m is described by a non-linear flow law with a power exponent of approximately 3-4. A sharp transition between the two flow regimes is likely caused by a change in the dominant mechanism …

The Effects Of Character Education On Student Behavior., William G. Thompson

Electronic Theses and Dissertations

Character education has been a part of public schooling in the United States since its beginning. It has undergone dramatic changes over the years, from didactic instruction to service learning; it continues to evolve as more and more schools become involved in teaching students right from wrong. The current emphasis on character education in schools began in the early 1990s as an attempt to alleviate the increasingly violent behavior of students as reported in the media.

The purpose of this study was to determine how character education affected the behavior of students. The study involved: observing student behavior; interviewing teachers, …

A Qualitative Study Of Effective School Discipline Practices: Perceptions Of Administrators, Tenured Teachers, And Parents In Twenty Schools., Faye Nelson

Electronic Theses and Dissertations

Many educators and parents are gravely concerned about disorder and danger in school environments. In addition to school discipline issues, American classrooms are frequently plagued by minor infractions of misbehavior that disrupt the flow of classroom activities and interfere with learning.

The purpose of this qualitative study was to investigate common threads of effective school discipline practices as perceived by administrators, tenured teachers, and parents in 20 schools in East Tennessee. I also attempted to determine if the views of administrators, tenured teachers, and parents are consistent with published research on school discipline practices. Data were collected from administrators, tenured …

The Effects Of Prescribed Fire On Millipede And Salamander Populations In A Southern Appalachian Deciduous Forest., Alison Baird Gagan

Electronic Theses and Dissertations

Prescribed fire has increased as a forest management practice in southern Appalachia, but investigations into the effects of this silvicultural treatment on non-game wildlife inhabiting the region is limited. This study investigated the effects of prescribed fire on millipede and salamander populations. Seventeen sites within the Cherokee National Forest in east Tennessee that were treated once with prescribed fire between 1998 and 2002 were examined in the spring of 2002. Each burned plot was paired with an adjacent unburned plot.

The number of individual millipedes and salamanders collected from burned plots was compared to the corresponding control plot. Millipedes declined …

Relationship Between Text Display Method And College Student Short Term Knowledge Retention During Self-Study., Jeff W. Church

Electronic Theses and Dissertations

This purpose of this study was to determine if a significant difference existed in the short-term knowledge retention of college freshmen reading informational stimulus materials presented through one of three different text display modes; 1) traditional printed text, 2) computer-displayed linear text, and 3) computer-displayed hypertext. The sample consisted of 267 college freshmen at a southern regional university. The 267 students were randomly selected from the entire population of entering freshmen during Fall 2002. These students were then randomly assigned to one of the three treatment groups. After reading the stimulus materials for a specified amount of time, students completed …

Sr-02-03-(14) 44 Ec, Marshall University

Recommendations

No abstract provided.

Program Of Distinction Awarded To Usf St. Petersburg, December 13, 2002, University Of South Florida St. Petersburg

USF St. Petersburg Campus News and Press Releases

No abstract provided.

Study Published In Science Finds Freshwater Runoff Into Arctic Ocean On The Rise, Amy Seif

Media Relations

No abstract provided.

The Bg News December 13, 2002, Bowling Green State University

BG News (Student Newspaper)

The BGSU campus student newspaper. December 13, 2002. Volume 91-Issue 72.

Daily Eastern News: December 13, 2002, Eastern Illinois University

December

No abstract provided.

Effects Of Brain Region And Gender On Proton Magnetic Resonance Spectroscopy In Normal Subjects, Marlyanne Pol-Rodriguez

Yale Medicine Thesis Digital Library

The purpose of this study was to acquire spectra using proton magnetic resonance spectroscopy (MRS) with a long echo time (TE) to measure clinically important brain metabolites in normal subjects. We aimed to determine whether these metabolites vary across brain regions and between men and women. The results of this study will constitute a normative database that will be used as a reference for MRS studies of patients with neurological disease. Single voxel proton (1H) spectra were acquired in seventy-two subjects ranging in age from twenty to forty-four years. Ten brain regions were examined. Six gray matter sites in the …

Dean Named To New School Of Applied Sciences, Elaine Pugh

University of Mississippi News

UNIVERSITY, Miss. - Linda Chitwood, who began her career as a high school physical education teacher, is new dean of the University of Mississippi's School of Applied Sciences.

Whalesong 2002-12-13 (V.24 No.7), N/A N/A

Whalesong

No abstract provided.

Soundings 2002-12-13 (V.15 No.24), N/A N/A

Soundings

No abstract provided.

University Of Central Florida Commencement, December 13 & 14, 2002, University Of Central Florida

Commencement Programs

No abstract provided.