Digital Commons Network^™

Shaping The Future Of Teacher Preparation In Science And Mathematics, M. George

Journal of Mathematics and Science: Collaborative Explorations

No abstract provided.

Aims & Scope

Journal of Mathematics and Science: Collaborative Explorations

No abstract provided.

An Undergraduate Intern Model For Mathematics Teacher Preparation, R. Ford, W. Fisher

Journal of Mathematics and Science: Collaborative Explorations

No abstract provided.

The Use Of Research To Inform The Evaluation Of The Maryland Collaborative For Teacher Preparation, J. Mcginnis, T. Watanabe

Journal of Mathematics and Science: Collaborative Explorations

No abstract provided.

Free Market Policies And Public Education: At What (Opportunity) Cost?, Kim K. Metcalf

Mid-Western Educational Researcher

Presidential Address

Front Matter, Deborah L. Bainer, Gene A. Kramer, Richard M. Smith

Mid-Western Educational Researcher

Front Matter

The Value Of Multimethod Qualitative/Quantitative Research Methodology In An Educational Program Evaluation: A Case Study, Catharine C. Knight, Walter J. Kuleck

Mid-Western Educational Researcher

This paper presents the case of an evaluation of a literacy-based public school classroom intervention that had been implemented without initial regard for subsequent evaluation, to examine the value of a multimethod qualitative and quantitative approach. We show how this evaluation challenge was ad-dressed using both techniques, and how they complement each other to create richer understandings. Given the small number of participants in and the brevity of the intervention, the finding of quantitative results that support the very positive qualitative results is encouraging. Thus, the multimethod qualitative/ quantitative approach appears to have been a useful and informative one in …

Multimethod Analysis Of Mathematics Achievement Tests, Dimiter M. Dimitrov

Mid-Western Educational Researcher

Multimethod analysis of mathematics achievement tests is illustrated by combining psychometric and statistical methods in the analysis of results from the California Achievement Test-Mathematics administered to seventh-graders from North-East Ohio.

The Status Of High School Scheduling In Illinois, Donald G. Hackmann

Mid-Western Educational Researcher

The purposes of this descriptive study were to determine the types of scheduling models being used in Illinois high schools, identify scheduling trends, and determine reasons for adopting scheduling changes. The principals of Illinois’ 635 public high schools were surveyed, and a 100% response rate was achieved after two rounds of questionnaires were mailed and telephone surveys were conducted of remaining nonrespondents. Nearly three-fourths of Illinois high schools utilize a traditional daily- period schedule, but trends indicate increasing numbers of schools are adopting or considering block-of-time models. Principals implementing block-of-time schedules noted a variety of reasons for this change, including …

The Relationship Between Culture And Cognitive Style: A Review Of The Evidence And Some Reflections For The Classroom, Joan Thrower Timm

Mid-Western Educational Researcher

This column summarizes factors in cultural experience that affect approaches to learning and problem solving. It reviews the evidence over the past thirty years on cognitive style differences in culturally diverse groups in the United States including Asian, African, Latino, and Native Americans and reports recent research findings on the Hmong. Finally, it raises some issues to consider when working with students from different cultural backgrounds.

Index Of Articles: 1999, Deborah L. Bainer, Gene A. Kramer, Richard M. Smith

Mid-Western Educational Researcher

Index of Articles

The Impact Of Tariff And Non-Tariff Barriers To Trade In Agricultural Commodities: A Disaggregated Approach, Jon Haveman, Jerry G. Thursby

Purdue CIBER Working Papers

No abstract provided.

Reforming Undergraduate Economics Instruction In The Former Soviet Union, Michael Watts, Alexander Kovzik

Purdue CIBER Working Papers

No abstract provided.

Gasturbnlab Pse Design, Sanford Fleeter, Elias N. Houstis, John R. Rice, Chem Zhou

Department of Computer Science Technical Reports

No abstract provided.

Mechanics Of Cpr Performed With The Patient On A Soft Bed Versus A Hard Surface, John M. Boe, Charles F. Babbs

Weldon School of Biomedical Engineering Faculty Publications

Objective: To study the effects of underlying bed softness versus stiffness on the effectiveness of chest compressions in CPR. Methods: For a wide range of bed stiffness constants, mathematical models describing compression of the human chest supported by a hospital bed were created for an adult thorax experiencing either a sinusoidal compressive force or a sinusoidal sternal displacement. Results: With 5 cm peak displacement, sternum-to-spine compression fell from 4.3 to 1.0 cm, and peak power fell from 59 to 23 Watts, as bed stiffness decreased from 50,000 to 5,000 N/m. Less than 35% of maximal chest compression occurred at a …

Computer-Assisted Kinematic Tolerance Analysis Of A Gear Selector Mechanism With The Configuration Space Method, Elisha P. Sacks, Leo Joskowicz, Ralf Schultheiss, Uwe Hinze

Department of Computer Science Technical Reports

No abstract provided.

Heuristics And A Mathematical Framework For Scheduling Data Requests In A Distributed Communication Network , Mitchell D. Theyst, Min Tan, Noah B. Beck, H. J. Siegel Purdue University School Of Electrical And Computer Engineering, Michael Jurczyk

Department of Electrical and Computer Engineering Technical Reports

Providing up-to-date input to users' applications is an important data managemerit problem for a distributed computing environment, where each data storage location and intermediate node may have specific clata available, storage limitations, and communication links available. Sites in the network request data items and each request has an associated deadline and priority. In a military situation, the data staging problem involves positioning data for facilitating a faster access time when it is, needed by programs that will aid in decision making. This work concentrates on solving a basic version of the clata staging problem in which all parameter values for …

A Framework For Building Collaborative Network Agents, Ladislau Bölöni, Dan C. Marinescu

Department of Computer Science Technical Reports

No abstract provided.

Nightly And Seasonal Movements Of Boiga Irregularis On Guam, Mark Tobin, Robert Sugihara, Patricia Pochop, Michael Linnell

United States Department of Agriculture Wildlife Services: Staff Publications

Brown tree snakes (Boiga irregularis, BTS), inadvertently introduced to the island of Guam shortly after World War II, have had catastrophic effects on the native fauna of this U.S. territory. We used radio-telemetry to monitor daytime refugia and nightly movements of 60 BTS (30 during each of two seasonal periods) to determine the extent of nightly, weekly, and monthly movements. Eighty-three percent of subadult daytime sightings were in trees, compared to only 49% of adult daytime sightings. Most measures of movement did not vary with seasonal period, sex, or age class. BTS moved an average of 64 m …

Nexus / By Melinda Rye, Melinda Rye

Electronic Theses and Dissertations

No abstract provided.

Gene Flow Among Habitat Patches On A Fragmented Landscape In The Spider Argiope Trifasciata (Araneae: Araneidae), Martina G. Ramirez, Kirsten E. Haakonsen

Biology Faculty Works

The banded garden spider (Argiope trifasciata) is a common orb weaver of old field habitats in the United States. In this study, we determined levels of genetic variability and gene flow among seven populations in central Pennsylvania, based on variation at eight allozyme loci. Mean heterozygosity (observed) per population was 7.5% and mean polymorphism was 39.3%, consistent with levels of variability in other arthropods. Values of GST for the four polymorphic loci (mean G_ST=0.011) suggest that gene flow prevents the genetic differentiation of these populations. The average number of migrants per generation (Nm) among …

Modeling Of Channel Planform Evolution / By Fernando Toro, Fernando Toro

Electronic Theses and Dissertations

No abstract provided.

From Euclid, Through Chebychev, Toward The Prime Number Theorem / By Kimberly Rose Smith, Kimberly Rose Smith

Electronic Theses and Dissertations

No abstract provided.

Economic And Environmental Benefits Of Soil/Water Nitrogen Testing: The Case Of Central Nebraska, C. S. Kim, Harold Taylor, Carmen Sandretto

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

This research presents a competitive dynamic model to evaluate the economic and groundwater quality benefits resulting from the adoption of soil/water nitrogen testing. The model is applied to an irrigated corn production county in the Nebraska Mid-State area where the groundwater contamination level from nitrates is reported to be, on average 18.7 parts per million (ppm). Adoption of nutrient management practices would result in increased economic benefits to farmers and reduced nitrate stocks in groundwater.

Enterprise Business Objects : Design And Implementation Of A Business Object Framework, Kai-Uwe Schafer

Theses

Software components representing business entities like customer or purchase order introduce a new way of Online Transaction Processing to business applications. Collaborating business objects allow to complete whole business processes as a single distributed transaction, instead of dividing it into queued steps, which sometimes even require user intervention. This IS due to the fact that business objects contain both business data and logic and that they incorporate multiple databases from different vendors and different geographic locations in a single transaction.

Business objects cannot be used as stand-alone components, but require a framework of services that manage persistence, concurrent transactions, and …

Characterisation And Optimisation Of Gypsum Crystallization, Catherine H. Shannon

Theses

Gypsum is produced as a by-product during the citric acid production process at ADM Ringaskiddy. The particle size and filterability of the gypsum has a critical bearing on the overall citric acid production rate. Prior to August 1996, research in the area of gypsum crystal optimisation at ADM had concentrated on the application of vortex mixing to perform the gypsum formation reaction. While the gypsum crystals produced with vortex mixing were found to be desirably clear of microcrystalline gypsum, the crystals were considerably smaller and more difficult to filter and wash. This research project sought to retain the advantages conferred …

The Atomic Force Microscope In The Elucidation Of Leukocyte Abnormality, Derbrenn O'Connor

Theses

The aim of this project was to investigate the novel use of the atomic force microscope (AFM) as a technique in the elucidation of leukocyte abnormality. To this end, comparative AFM imaging and elasticity studies were performed on normal and myeloid leukaemic leukocytes.

Initially, an evaluation of techniques for the isolation of specific leukocyte (e.g. lymphocytes, granulocytes, etc.) populations from whole blood or leukocyte concentrates, was carried out. It was found that a silanised glass surface failed to select and immobilise a leukocyte population. However, centrifugation of whole blood in an Isopaque-ficoll gradient solution yielded a viable mixed leukocyte population …

The Influence Of Trunk Modelling In 3d Biomechanical Analysis Of Simple And Complex Lifting Tasks, Christian Larivière, Denis Gagnon

Études primaires

No abstract provided.

New Polyether Toxins From Shellfish And Marine Phytoplankton: Isolation Studies And Development Of Analytical Methods, Alan G. Bishop

Theses

There are three classes of polyether toxins responsible for Diarrhetic Shellfish Poisoning (DSP) world-wide. The causative toxins are okadaic acid (OA) and derivatives (DTXs), pectenotoxins (PTXs) and yessotoxins (YTXs). The origin of these toxins are phytoplankton from Dinophysis or Prorocentrum spp. OA has been demonstrated for most outbreaks in Europe and more recently a new isomer DTX-2 has been reported in Ireland.

Marine phytoplankton biomass samples consisting predominantly of Dinophysis acuta, were acquired using a large double plankton net from waters off the South-west coast of Ireland. Analysis of unialgal samples using high performance liquid chromatography (HPLC) with fluorescence and …

Computer Based Methodologies For On-Line Scanning Force Microscopic Detection Of Immunological Binding Events, Patrick Joseph O'Mahony

Theses

The overall aim of this work was to develop computer based methodologies for the on-line scanning force microscopic detection of immunological binding events. To achieve this aim it was necessary to develop a rapid, high-resolution data acquisition system to digitise scanning force microscope (SFM) data on-line and then to develop an effective method for extracting the scanner induced background curvature from this data to reveal the nanoscale height binding events. Four techniques were investigated in terms of operational speed and performance accuracy; namely, polynomial interpolation; least squares approximation; real-time recursive least squares approximation; and wavelet approximation.

It was found that …