Digital Commons Network^™

Adjusting For Non-Ignorable Verification Bias In Clinical Studies For Alzheimer’S Disease, Xiao-Hua Zhou, Pete Castelluccio

UW Biostatistics Working Paper Series

A common problem for comparing the relative accuracy of two screening tests for Alzheimer’s disease (D) in a two-stage design study is verification bias. If the verification bias can be assumed to be ignorable, Zhou and Higgs (2000) have proposed a maximum likelihood approach to compare the relative accuracy of screening tests in a two-stage design study. However, if the verification mechanism also depends on the unobserved disease status, the ignorable assumption does not hold. In this paper, we discuss how to use a profile likelihood approach to compare the relative accuracy of two screening tests for AD without assuming …

Marine Science Journal Prices : A Case Study, Judith B. Barnett

Technical Services Faculty Publications

Approximately 350 English-language journals in the interdisciplinary field of marine science are published. Two groups, one of fity titles, and one of fourteen are analyzed for price increases between 1997 and 2003. Within the larger context of escalating journal prices in all scientific fields, the marine science journals have increased in price approximately 71% during this period, while general science titles have increased 34%.

Generalized Q-Deformed Symplectic Sp(4) Algebra For Multi-Shell Applications, K. D. Sviratcheva, A. I. Georgieva, J. P. Draayer

Faculty Publications

A multi-shell generalization of a fermion representation of the q-deformed compact symplectic spq(4) algebra is introduced. An analytic form for the action of two or more generators of the Spq (4) symmetry on the basis states is determined and the result used to derive formulae for the overlap between number-preserving states as well as for matrix elements of a model Hamiltonian. A second-order operator in the generators of Sp q(4) is identified that is diagonal in the basis set and that reduces to the Casimir invariant of the sp(4) algebra in the non-deformed limit of the theory. The results can …

Volume 40, Number 40: July 11, 2003, University Of North Dakota

University Letter Archive

No abstract provided.

Soundings 2003-07-11 (V.16 No.13), N/A N/A

Soundings

No abstract provided.

Dermal Absorption Of A Dilute Aqueous Solution Of Malathion, John E. Scharf Md

USF Tampa Graduate Theses and Dissertations

Malathion is a commonly used organophosphate pesticide on field crops, fruits, nut trees, vegetables, livestock, agricultural premises, and land. The approved uses also include mosquito and medfly control. These uses can result in human skin contact. The purpose of this study is to evaluate the human skin absorption of malathion for the purpose of assessing the risks associated with aqueous solution exposures following applications. Aerial applications can result in solubilized malathion in swimming pools and other waters that may be contacted. Human volunteers were selected and exposed to aqueous solutions of malathion at various concentrations. Participants submerged their arms and …

Development Of Advanced High Temperature Heat Exchangers: Proposal, University Of Nevada, Las Vegas. Research Foundation

Publications (NSTD)

A research team led by the University of Nevada, Las Vegas (UNLV) Research Foundation proposes a project to develop advanced high temperature heat exchangers (HTHX) for hydrogen production and electrical energy conversion from advanced nuclear reactor concepts. This project will also support the development of Generation IV reactors. The research team includes researchers from UNLV, General Atomics (GA), Sandia National Laboratories (SNL), The University of California, Berkeley UCB) and Oak Ridge National Laboratory (ORNL).

The proposed project will be administered by the University of Nevada Las Vegas Research Foundation (UNLVRF). UNLVRF will provide the overall contract administration and is the …

Vol.31 N.19 July 10th 2003, Brown Publishing Company

Black Voice News

No abstract provided.

Minutes, Juvenile Welfare Board, July 10, 2003, Janet Caramello

Juvenile Welfare Board Agendas, Minutes, and Historical Audits

Minutes from the July 10, 2003, meeting of the Juvenile Welfare Board. Attached as supplemental files are previous meeting minutes and reports to review before the meeting.

Exploring Links Between Physical And Probabilistic Models Of Volcanic Eruptions: The Soufriere Hills Volcano, Montserrat, Charles B. Connor, R. S. J. Sparks, R. M. Mason, Costanza Bonadonna, S. R. Young

Geology Faculty Publications

Probabilistic methods play an increasingly important role in volcanic hazards forecasts. Here we show that a probability distribution characterized by competing processes provides an excellent statistical fit (>99% confidence) to repose intervals between 75 vulcanian explosions of Soufrière Hills Volcano, Montserrat in September–October, 1997. The excellent fit is explained by a physical model in which there are competing processes operating in the upper volcano conduit on different time scales: pressurization due to rheological stiffening and gas exsolution, and depressurization due to development of permeability and gas escape. Our experience with the Soufrière Hills Volcano eruption sequence suggests that volcanic …

Campus Chronicle (Vol. 6, No. 1), Valparaiso University

Campus Chronicle

No abstract provided.

On The Intrinsic Complexity Of Learning Recursive Functions, Sanjay Jain, Efim Kinber, Christophe Papazian, Carl Smith, Rolf Wiehagen

School of Computer Science & Engineering Faculty Publications

The intrinsic complexity of learning compares the difficulty of learning classes of objects by using some reducibility notion. For several types of learning recursive functions, both natural complete classes are exhibited and necessary and sufficient conditions for completeness are derived. Informally, a class is complete iff both its topological structure is highly complex while its algorithmic structure is easy. Some self-describing classes turn out to be complete. Furthermore, the structure of the intrinsic complexity is shown to be much richer than the structure of the mind change complexity can behave “orthogonally”.

Early Quintessence In Light Of Thewilkinson Microwave Anisotropy Probe, Robert R. Caldwell, Michael Doran, Christian M. Mller, Gregor Schfer, Christof Wetterich

Dartmouth Scholarship

We examine the cosmic microwave background (CMB) anisotropy for signatures of early quintessence dark energy—a nonnegligible quintessence energy density during the recombination and structure formation eras. Only very recently does the quintessence overtake the dark matter and push the expansion into overdrive. Because the presence of early quintessence exerts an influence on the clustering of dark matter and the baryon-photon fluid, we may expect to find trace signals in the CMB and the mass fluctuation power spectrum. In detail, we demonstrate that suppressed clustering power on small length scales, as suggested by the combined Wilkinson Microwave Anisotropy Probe/CMB/large-scale structure …

Learning To Fly, Laura H. Capes

Digitized Theses and Dissertations (prior to 2008)

This is to certify that the Master of Education Portlolio of Laura H. Capes has been approved by the Supervising Committee for the portfolio requirement for the Master of Education in Special Education in the Department of Special Education

Computer Aided Diagnosis In Digital Mammography: Classification Of Mass And Normal Tissue, Monika Shinde

USF Tampa Graduate Theses and Dissertations

The work presented here is an important component of an on going project of developing an automated mass classification system for breast cancer screening and diagnosis for Digital Mammogram applications. Specifically, in this work the task of automatically separating mass tissue from normal breast tissue given a region of interest in a digitized mammogram is investigated. This is the crucial stage in developing a robust automated classification system because the classification depends on the accurate assessment of the tumor-normal tissue border as well as information gathered from the tumor area. In this work the Expectation Maximization (EM) method is developed …

A Visual Framework Invites Human Into The Clustering Process, Keke Chen, Ling Liu

Kno.e.sis Publications

Clustering is a technique commonly used in scientific research. The task of clustering inevitably involves human participation - the clustering is not finished when the computer/algorithm finishes but the user has evaluated, understood and accepted the patterns. This defines a human involved "clustering-analysis/evaluation" iteration. Instead of neglecting this human involvement, we provide a visual framework (VISTA) with all power of algorithmic approaches (since their result can be visualized), and in addition we allow the user to steer/monitor/refine the clustering process with domain knowledge. The visual-rendering result also provides a precise pattern for fast post-processing.

Central Florida Future, Vol. 35 No. 71, July 9, 2003

Central Florida Future

Pumped up performance: Grade inflation could be the culprit fir rising GPAs; New provost Hickey sweats comfortably through his first week; Bush gets an 'F' grade on environmental report card.

Multienergetic External-Beam Pixe As A Means Of Stydying The Surface Enrichment Effect In Coins, Scott Evans Perry

Theses and Dissertations

This thesis paper examines the feasibility of using external-beam PIXE to study the surface enrichment effect in metal artifacts. By varying the energy of the incident proton beam, we penetrated the artifact's surface to different levels and were able to produce a depth profile of the elemental composition of the sample. In this study, the sample set we chose to examine consisted of ancient and modern coins. This paper first describes the surface enrichment effect and theoretically how PIXE can be used to study it. It then details the construction of the components of the external-beam setup. Many of the …

The Daily Egyptian, July 09, 2003, Daily Egyptian Staff

July 2003

No abstract provided.

Murray Ledger And Times, July 9, 2003, Murray Ledger And Times

The Murray Ledger & Times

No abstract provided.

A Multilevel, Longitudinal Analysis Of Middle School Math And Language Achievement, Keith Zvoch, Joseph J. Stevens

Education Policy Analysis Archives (EPAA)

The performance of schools in a large urban school district was examined using achievement data from a longitudinally matched cohort of middle school students. Schools were evaluated in terms of the mean achievement and mean growth of students in mathematics and language arts. ...

Education Policy Analysis Archives 11/20 , Arizona State University, University Of South Florida

College of Education Publications

Multilevel, longitudinal analysis of middle school math and language achievement / Keith Zvoch [and] Joseph J. Stevens.

Chess: A Tool For Cdfg Extraction And High-Level Synthesis Of Vlsi Systems, Ravi K. Namballa

USF Tampa Graduate Theses and Dissertations

In this thesis, a new tool, named CHESS, is designed and developed for control and data-flow graph (CDFG) extraction and the high-level synthesis of VLSI systems. The tool consists of three individual modules for:(i) CDFG extraction, (ii) scheduling and allocation of the CDFG, and (iii) binding, which are integrated to form a comprehensive high-level synthesis system. The first module for CDFG extraction includes a new algorithm in which certain compiler-level transformations are applied first, followed by a series of behavioral-preserving transformations on the given VHDL description. Experimental results indicate that the proposed conversion tool is quite accurate and fast. The …

The Daily Egyptian, July 08, 2003, Daily Egyptian Staff

July 2003

No abstract provided.

Interferometer With Optical Fiber Interconnected Dual Arm Sampler., Aristide Dogariu, Gabriel Popescu

UCF Patents

An interferometric system includes first, second and third optical fibers with first and second couplers. The first coupler is configured to receive radiation through the first fiber, provide a first radiation portion through the second fiber and provide a second radiation portion through the third fiber to the second coupler. The system also includes fourth and fifth optical fibers each configured to receive radiation from the second coupler and transmit radiation for receipt by the other.

A Study Of The Critical Condition Of A Battened Column And A Frame By Classical Methods, Jamal A.H Bekdache

USF Tampa Graduate Theses and Dissertations

Knowledge of structural stability theory is of paramount importance to the practicing structural engineer. In many instances, buckling is the primary consideration in the design of various structural configurations. The first chapter introduces a simplified treatment of the elastic stability of a battened column using classical methods without getting involved with lengthy and complicated mathematical operations. In chapter two, a treatment of the elastic stability of a frame is presented, including effects of elastic restraints. In this study, a theoretical treatment is given which although approximate, is believed to constitute a satisfactory solution of the structure.

Teaching Mathematics In Australia : Results From The Timss 1999 Video Study, Jan Lokan, Barry Mcrae, Hilary Hollingsworth

TIMSS 1999

The broad purpose of the Third International Mathematics and Science Study (TIMSS) Video Study was to investigate and describe Year 8 mathematics and science teaching practices in a variety of countries. More specific aims included : development of objective, observational measures of classroom instruction to serve as quantitative indicators of teaching practices; comparison of teaching practices to identify similar or different lesson features across countries; and development of methods for reporting results of the study, including preparation of video cases for both research and professional development purposes. Australia's goals for participating in the study emphasised : obtaining authentic and rich …

Does Information Technology Provide Competitive Advantage And Improve Performance? An Empirical Study Of Trading Companies In Brazil, Ruth Clarke, Marcilio Machado

HCBE Faculty Presentations

Growing investment in information technology applications creates a need to understand the proper integration of these tools into strategic decision making of the firm. This study discusses the impact of global information and communication technologies on competitiveness and performance of Brazilian trading companies. Using resource based theory as a starting point, we examine how information technology, as an internal resource, can provide competitive advantage and what impact information technology produces on competitiveness of Brazilian export intermediaries. The study implements a replicable model (CAPITA) developed by Sethi and King (1994), to investigate these relationships in the emerging market of Brazil. The …

Lethal Control Of Red-Winged Blackbirds To Manage Damage To Sunflower: An Economic Evaluation, Bradley F. Blackwell, Eric Huszar, George M. Linz, Richard A. Dolbeer

United States Department of Agriculture Wildlife Services: Staff Publications

In the northern Great Plains of the United States, conflicts between red-winged blackbirds (Agelaius phoeniceus) and sunflower (Helianthus annuus) growers have intensified since the late 1960s due to the expanded commercial production of sunflowers. We studied the potential population effects of the removal of up to 2 million red-winged blackbirds annually under a 5-year program of baiting during spring with DRC-1339 (3-choloro-4-methalalanine)-treated rice. We also examined whether lethal control, in combination with current levels of breeding-habitat management, would be cost-effective in decreasing depredation of sunflower crops during late summer. We evaluated the cost-benefit ratio for 4 …

Deafdigest: Blue Edition, July 6, 2003, Barry Strassler

DeafDigest Blue 2003

No abstract provided.