Open Access. Powered by Scholars. Published by Universities.®

Physical Sciences and Mathematics Commons™

Open Access. Powered by Scholars. Published by Universities.®

2001

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 1951 - 1980 of 3030

Full-Text Articles in Physical Sciences and Mathematics

Using Manipulatives In Undergraduate Mathematics Courses, D. Moore Jan 2001

Using Manipulatives In Undergraduate Mathematics Courses, D. Moore

Journal of Mathematics and Science: Collaborative Explorations

Students in undergraduate mathematics classes not only benefit from the use of manipulatives in the classroom, but also enjoy them. This paper specifically outlines one successful activity that used manipulatives in a large section of a precalculus course and then explores possibilities in other courses. It also addresses the use of mathematics manipulatives as a platform to introduce both active and cooperative learning in a large lecture setting.

Go to article

The Transition To College Process In Pr-Cetp Scholars, E. Rivera, M. Rosa, A. Santiago, N. Torres, M. Bravo Jan 2001

The Transition To College Process In Pr-Cetp Scholars, E. Rivera, M. Rosa, A. Santiago, N. Torres, M. Bravo

Journal of Mathematics and Science: Collaborative Explorations

This article describes a study about the experiences of a group of students during the transition from high school to college. The students are future teachers who evidenced a high level of academic achievement in high school and received merit scholarships from the Puerto Rico Collaborative for Excellence in Teacher Preparation (PR-CETP). Two groups of students were compared: those who sustained a high GPA during their freshman year, and those who did not and, therefore, no longer qualified for the scholarship. The study was carried out through focused interviews with eight students, from three universities, four of whom maintained the …

Go to article

An Innovative University Course For Cooperating Teachers, M. Aguirre Ortiz, L. Gaspar Jan 2001

An Innovative University Course For Cooperating Teachers, M. Aguirre Ortiz, L. Gaspar

Journal of Mathematics and Science: Collaborative Explorations

The transformation of a course for certifying cooperating teachers in Puerto Rico is described. The course was transformed to strengthen the teaching of science and mathematics and to make the course more congruent with the educational principles of constructivism promoted by the CETP projects at the national level, including Puerto Rico. The 45-hour requirement was distributed over nine days. The Open Space strategy was modified to include multiple active teaching-learning and assessment techniques, which promoted a learning environment based on trust, dedication, and the commitment of all participants to learn and help each other learn. Even more relevant was the …

Go to article

Application Of Biotechnology To Solve Relevant Biological Problems Promotes Understanding Of Underlying Concepts, P. A. Burrowes, G. M. Nazario Jan 2001

Application Of Biotechnology To Solve Relevant Biological Problems Promotes Understanding Of Underlying Concepts, P. A. Burrowes, G. M. Nazario

Journal of Mathematics and Science: Collaborative Explorations

Although some efforts have been made to modify the curriculum of the Introductory Biology laboratories from a passive to a more experimental form, the use of modern biotechnology had not been implemented at our institution. The need to understand the applications of modern technology to real-life situations seems imperative at the turn of the century [1,2]. Because several studies have shown that the study of biotechnology by itself does not increase conceptual understanding, the objective of this research was to determine if the use of biotechnology to solve relevant biological problems increased conceptual understanding among our students. We designed two …

Go to article

The Learning Of Mathematical Concepts And Principles Through The Integration Of Technology In Laboratory Activities, E. Morera Gonzalez Jan 2001

The Learning Of Mathematical Concepts And Principles Through The Integration Of Technology In Laboratory Activities, E. Morera Gonzalez

Journal of Mathematics and Science: Collaborative Explorations

No abstract provided.

Go to article

Understanding Of The Mole Concept Achieved By Students In A Constructivist General Chemistry Course, C. Utria-Echevarria, M. Bravo Jan 2001

Understanding Of The Mole Concept Achieved By Students In A Constructivist General Chemistry Course, C. Utria-Echevarria, M. Bravo

Journal of Mathematics and Science: Collaborative Explorations

The purpose of this research project was to study the conceptual understanding achieved in a general chemistry course based on a constructivist approach. A group of 28 students participated in repeated measures obtained by means of conceptual maps about the mole concept prepared three times during the course: at the beginning the course, immediately after the concept was studied, and after studying other related concepts. In addition, eight students selected from the group of 28 were interviewed. The interviews were carried out focusing on their conceptual maps. The analysis of the repeated measures indicated significant differences among the three times, …

Go to article

The Design, Implementation, And Assessment Of A New Capstone Course Aimed At Science Education Majors, R. Betancourt, J. Arce Jan 2001

The Design, Implementation, And Assessment Of A New Capstone Course Aimed At Science Education Majors, R. Betancourt, J. Arce

Journal of Mathematics and Science: Collaborative Explorations

This paper rationalizes the selection of the concept of energy as the central theme of a new capstone course aimed at science education majors. It describes the goals of the course and the activities that preceded the course design and led to the selection of the topics, of the educational materials, and of the teaching methodologies. It presents a sequential description of the manner in which the conceptual knowledge of energy was to be developed. The specific experiments, interactive demonstrations and other educational materials utilized for the conceptual development of the concept of energy in context are described and referenced. …

Go to article

Program Evaluation In The Context Of Debates In The Field: The Evaluation Of Pr-Cetp, M. Bravo Jan 2001

Program Evaluation In The Context Of Debates In The Field: The Evaluation Of Pr-Cetp, M. Bravo

Journal of Mathematics and Science: Collaborative Explorations

This paper rationalizes the selection of the concept of energy as the central theme of a new capstone course aimed at science education majors. It describes the goals of the course and the activities that preceded the course design and led to the selection of the topics, of the educational materials, and of the teaching methodologies. It presents a sequential description of the manner in which the conceptual knowledge of energy was to be developed. The specific experiments, interactive demonstrations and other educational materials utilized for the conceptual development of the concept of energy in context are described and referenced. …

Go to article

Journal Of Mathematics And Science: Collaborative Explorations Jan 2001

Journal Of Mathematics And Science: Collaborative Explorations

Journal of Mathematics and Science: Collaborative Explorations

No abstract provided.

Go to article

Bridges To The Baccalaureate Program At J. Sargeant Reynolds Community College And Virginia Commonwealth University, D. Neely-Fisher Jan 2001

Bridges To The Baccalaureate Program At J. Sargeant Reynolds Community College And Virginia Commonwealth University, D. Neely-Fisher

Journal of Mathematics and Science: Collaborative Explorations

This paper describes a research apprenticeship to encourage and to inspire minority students to major in disciplines that lead to careers in biomedical research.

Go to article

Educational Research Abstracts, G. Bass Jr. Jan 2001

Educational Research Abstracts, G. Bass Jr.

Journal of Mathematics and Science: Collaborative Explorations

Editors' Note: As noted in previous issues of the Journal of Mathematics and Science: Collaborative Explorations, the purpose of this Educational Research Abstract section is to present current research on issues relevant to math and science teaching at both the K-12 and college levels. Because educational research studies are published in so many different academic journals and presented as so many different professional conferences, it is a rare public school teacher or college professor who is familiar with the range of recent reposts on a particular instructional technique or curricular advancement. Indeed, the uniqueness of various pedagogical strategies has been …

Go to article

Aims & Scope Jan 2001

Aims & Scope

Journal of Mathematics and Science: Collaborative Explorations

No abstract provided.

Go to article

Project Matrix: Identifying The Mathematically Talented And Meeting The Mathematical Needs Of All, M. K. Murray Jan 2001

Project Matrix: Identifying The Mathematically Talented And Meeting The Mathematical Needs Of All, M. K. Murray

Journal of Mathematics and Science: Collaborative Explorations

No abstract provided.

Go to article

Fuzzycast: Media Broadcasting For Multiple Asynchronous Receivers, Marcel Waldvogel, Wei Deng, Ramaprabhu Janakiraman Jan 2001

Fuzzycast: Media Broadcasting For Multiple Asynchronous Receivers, Marcel Waldvogel, Wei Deng, Ramaprabhu Janakiraman

All Computer Science and Engineering Research

When using an on-demand media streaming system on top of a network with Multicast support, it is sometimes more efficient to use broadcast to distribute popular content. There has been a lot of research in broadcasting on-demand content to multiple, asynchronous receivers. In this paper, we propose a family of novel, practical techniques for broadcasting on-demand media, which achieve lowest known server/network bandwidth usage and I/O efficient client buffer management, while retaining the simplicity of a frame-based single channel scheme.

Go to article

Existence Criteria For Singular Initial Value Problems With Sign Changing Nonlinearities, Ravi P. Agarwal, Donal O'Regan, V. Lakshmikantham Jan 2001

Existence Criteria For Singular Initial Value Problems With Sign Changing Nonlinearities, Ravi P. Agarwal, Donal O'Regan, V. Lakshmikantham

Mathematics and System Engineering Faculty Publications

A general existence theory is presented for initial value problems where our nonlinearity may be singular in its dependent variable and may also change sign.

Go to article

Computer Graphics Optique: Optical Superposition Of Projected Computer Graphics, Aditi Majumder Jan 2001

Computer Graphics Optique: Optical Superposition Of Projected Computer Graphics, Aditi Majumder

Link Foundation Modeling, Simulation and Training Fellowship Reports

We present some ideas and demonstrations for a hybrid projector-based rendering and display technique we call Computer Graphics Optique. Instead of partially overlapping projected images to achieve a wide-area display, we completely overlap projected images on top of each other to achieve the addition of light and color in an "optical composition buffer''. The idea is to use the optical composition to replace some analytical computation, to increase rendering speed, gain flexibility, intensity range, and intensity resolution. Where projector-based displays are appropriate, potential uses include the optical realization of certain effects normally requiring a digital accumulation buffer, the optical composition …

Go to article

Enhancing Training And Presence In Virtual Environments Using Passive Haptics, Brent E. Insko Jan 2001

Enhancing Training And Presence In Virtual Environments Using Passive Haptics, Brent E. Insko

Link Foundation Modeling, Simulation and Training Fellowship Reports

One of the worst virtual environment experiences is to virtually contact something and feel nothing. Visual-haptic sensory conflicts are normally dominated by visual perception. Therefore, augmenting a high-fidelity visual virtual environment with low-fidelity haptic objects, called passive haptics, should markedly improve both sense of presence and task training effectiveness. Testing these hypotheses, I found adding a 1.5 inch physical ledge to a visual-cliff virtual environment increased participants' sense of presence as measured by subjective questionnaires, observed participant behaviors, and physiological responses. I next examined memory model creation and training effectiveness for a navigation task in a virtual environment with and …

Go to article

Multiband Microvariability Observations Of Bl Lacertae During The Outburst Of 1997, Sandra D. Clements, Michael T. Carini Jan 2001

Multiband Microvariability Observations Of Bl Lacertae During The Outburst Of 1997, Sandra D. Clements, Michael T. Carini

Aerospace, Physics, and Space Science Faculty Publications

BL Lac was observed in the V and R bands on 11 nights in 1997 July during a major optical outburst. It varied continuously, exhibiting nightly variations ranging from 0.1 to 0.6 mag. Over the course of the 11 nights, BL Lac was seen to vary by 1.8 R magnitudes. Color variations were also observed, with BL Lac becoming bluer as it brightened. The influence of variable seeing conditions on the observed variations was investigated. No correlation was found between the observed microvariability and the local seeing conditions.

Go to article

Complexity As Fitness For Evolved Cellular Automata Update Rules, Em Ward, Doug Blank, Douglas Rolniak, Dale R. Thompson Jan 2001

Complexity As Fitness For Evolved Cellular Automata Update Rules, Em Ward, Doug Blank, Douglas Rolniak, Dale R. Thompson

Computer Science Faculty Research and Scholarship

We investigate the state change behavior of one-dimensional cellular automata during the solution of the binary density-classification task. Update rules of high, low and un- known fitness are applied to cellular au- tomata, thereby providing examples of high and low rates of successful classification. A spread factor, ω, is introduced and investi- gated as a numerical marker of state change behavior. The nature of ω describes complex or particle-like behavior on the part of the cellular automata over the middle region of initial configuration density-distribution, but breaks down at the ends. Because of the lim- itation on ω, a related …

Go to article

A Robot Team That Can Search, Rescue, And Serve Cookies: Experiments In Multi-Modal Person Identification And Multi-Robot Sound Localization., Doug Blank, G. Beavers Jan 2001

A Robot Team That Can Search, Rescue, And Serve Cookies: Experiments In Multi-Modal Person Identification And Multi-Robot Sound Localization., Doug Blank, G. Beavers

Computer Science Faculty Research and Scholarship

A team of three robots placed second in both the Urban Search and Rescue and Hors d’Oeuvres Anyone? events at the 2000 American Association of Artificial Intelligence au- tonomous robot competitions. This paper describes the multi- robot, low-cost sound localization technique, and the multi- sensor, person recognition system used in the AAAI contests by the robot team.

Go to article

Cooperativity Of Dna Object Self-Assembly, Ava Caudill Dykes Jan 2001

Cooperativity Of Dna Object Self-Assembly, Ava Caudill Dykes

Theses, Dissertations and Capstones

In this study, the temperature dependence of self-assembling DNA structures was investigated. Specially designed two-dimensional DNA nanoarrays offer not only structural stability not normally associated with DNA, but also provide several possible sites of interaction, referred to as free ends, which can be easily exploited through conventional Watson-Crick base pairing. The ability to synthesize two-dimensional DNA nanoarrays was corroborated by confirming the presence of the nanoarrays by AFM imaging in air. The physical characteristics of two-dimensional DNA nanoarrays were also studied. DNA nanoarray synthesis occurs via a self-assembly process based on Watson-Crick base pairing. This self-assembly occurs through an annealing …

Go to article

The Effects Of A Low-Intensity Exercise Program On The Fitness Level Of A 22 Year-Old Female With Congenital Univentricular Heart Repair, Alice A. Elkins Jan 2001

The Effects Of A Low-Intensity Exercise Program On The Fitness Level Of A 22 Year-Old Female With Congenital Univentricular Heart Repair, Alice A. Elkins

Theses, Dissertations and Capstones

This case study examined the effects of exercise on a 22 year-old female with a repaired univentricular heart through early, modified Fontan technique. Improvements in oxygen consumption, blood pressure, heart rate and body composition were observed after a 12-week supervised fitness program. This program considers reversing hypoactivity and the subsequent deconditioning and obesity associated with this patient.

Go to article

A Site Specific Impact Study: Valley Fill Construction Impacts On Water Chemistry And Benthic Macroinvertebrate Assemblages, Terry Morton Tomasek Jan 2001

A Site Specific Impact Study: Valley Fill Construction Impacts On Water Chemistry And Benthic Macroinvertebrate Assemblages, Terry Morton Tomasek

Theses, Dissertations and Capstones

Downstream impacts of contour surface mining and valley fill construction were evaluated utilizing both water chemistry and EPA approved Rapid Bioassessment Protocol III. Wiley Branch was sampled in February of 1999 before mining perturbation. Five downstream stations were established with benthic macroinvertebrates and water samples collected seasonally for a period of sixteen months. Water chemistry parameters, pH, total aluminum, iron, and manganese, total suspended solids, total dissolved solids, sulfates, alkalinity, acidity and specific conductivity fluctuated but generally remained within acceptable governmental limits. Initially, benthic macroinvertebrate communities were well balanced within the stream. There was a high abundance of EPT individuals …

Go to article

Rush Hour® And Dijkstra’S Algorithm, Mark Stamp, Brad Engel, Mcintosh Ewell, Victor Morrow Jan 2001

Rush Hour® And Dijkstra’S Algorithm, Mark Stamp, Brad Engel, Mcintosh Ewell, Victor Morrow

Faculty Publications, Computer Science

The game of Rush Hour® includes a 6 × 6 grid and game pieces representing cars and trucks. The object of the puzzle is to move a special car out of a gridlocked “traffic jam.” In this note we apply Dijkstra’s algorithm and a breadth-first search to solve any Rush Hour configuration.

Go to article

Dynamics Of Stars And Globular Clusters In M87, Aaron J. Romanowsky, C. S. Kochanek Jan 2001

Dynamics Of Stars And Globular Clusters In M87, Aaron J. Romanowsky, C. S. Kochanek

Faculty Publications

We examine the dynamics of the stars and globular clusters in the nearby giant elliptical galaxy M87 and constrain the mass distribution, using all the available data over a large range of radii, including higher order moments of the stellar line-of-sight velocity distributions and the discrete velocities of over 200 globular clusters. We introduce an extension of spherical orbit modeling methods that makes full use of all the information in the data and provides very robust constraints on the mass models. We conclusively rule out a constant mass-to-light ratio model and infer that the radial density profile of the galaxy's …

Go to article

A New Species Of Extinct Oryzomyine Rodent From The Quaternary Of Curaçao, Netherlands Antilles, Donald A. Mcfarlane, Adolphe O. Debrot Jan 2001

A New Species Of Extinct Oryzomyine Rodent From The Quaternary Of Curaçao, Netherlands Antilles, Donald A. Mcfarlane, Adolphe O. Debrot

WM Keck Science Faculty Papers

An extinct new species of Oryzomyine rodent, known since 1936 from the cave of Grot van Hato on the island of Curaçao, is described from abundant new specimens collected from owl-pellet deposits at three localities on the island.

Go to article

Privacy-Preserving Cooperative Statistical Analysis, Wenliang Du, Mikhail J. Atallah Jan 2001

Privacy-Preserving Cooperative Statistical Analysis, Wenliang Du, Mikhail J. Atallah

Electrical Engineering and Computer Science - All Scholarship

The growth of the Internet opens up tremendous opportunities for cooperative computation, where the answer depends on the private inputs of separate entities. Sometimes these computations may occur between mutually untrusted entities. The problem is trivial if the context allows the conduct of these computations by a trusted entity that would know the inputs from all the participants; however if the context disallows this then the techniques of secure multi-party computation become very relevant and can provide useful solutions. Statistic analysis is a widely used computation in real life, but the known methods usually require one to know the whole …

Go to article

Secure Multi-Party Computation Problems And Their Applications: A Review And Open Problems, Wenliang Du, Mikhail J. Atallah Jan 2001

Secure Multi-Party Computation Problems And Their Applications: A Review And Open Problems, Wenliang Du, Mikhail J. Atallah

Electrical Engineering and Computer Science - All Scholarship

The growth of the Internet has triggered tremendous opportunities for cooperative computation, where people are jointly conducting computation tasks based on the private inputs they each supplies. These computations could occur between mutually untrusted parties, or even between competitors. For example, customers might send to a remote database queries that contain private information; two competing financial organizations might jointly invest in a project that must satisfy both organizations' private and valuable constraints, and so on. Today, to conduct such computations, one entity must usually know the inputs from all the participants; however if nobody can be trusted enough to know …

Go to article

Inter-Domain Lsp Setup Using Bandwidth Management Points, Ibrahim Taner Okumus, Junseok Hwang, Haci Ali Mantar, Steve J. Chapin Jan 2001

Inter-Domain Lsp Setup Using Bandwidth Management Points, Ibrahim Taner Okumus, Junseok Hwang, Haci Ali Mantar, Steve J. Chapin

Electrical Engineering and Computer Science - All Scholarship

Bandwidth Management Points (BMP) are a necessity to manage the intra and inter-domain resources in the Internet. In this paper we propose a way to setup inter-domain Label Switched Path (LSP) with the help of a BMP in a MultiProtocol Label Switching (MPLS) over DiffServ network. We use extended Simple Inter-domain Bandwidth Broker Signalling Protocol (SIBBS) to distribute the labels inter-domain. We also use a BMP to interact with the MPLS to setup the intra-domain LSP and to provision the intra-domain traffic. With the help of a BMP, we show how end-to-end Quality of Service (QoS) can be achieved.

Go to article

Interdomain Resource Reservation Via Third-Party Agent, Haci Ali Mantar, Junseok Hwang, Ibrahim Taner Okumus, Steve J. Chapin Jan 2001

Interdomain Resource Reservation Via Third-Party Agent, Haci Ali Mantar, Junseok Hwang, Ibrahim Taner Okumus, Steve J. Chapin

Electrical Engineering and Computer Science - All Scholarship

This paper describes interdomain resource reservation through a third-party agent called a Bandwidth Management Point (BMP). The BMP of each domain is responsible for admission control, dynamic bandwidth provisioning, DSCP assignment, policy control, etc. We also propose that each domain be free to choose its own intradomain resource reservation protocol.This model solves two significant problems of today's Internet: interdomain dynamic resource provisioning, and scalability of the backbone. The BMP makes bulk reservations with each possible destination domain on behalf of hosts in its domain, and end hosts can join or leave the reservation without being involved with communication protocol between …

Go to article

First Prev Next Last