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Physical Sciences and Mathematics Commons™
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Articles 1 - 29 of 29
Full-Text Articles in Physical Sciences and Mathematics
Oregon Collaborative For Excellence In The Preparation Of Teachers – An Overview, M. Enneking
Oregon Collaborative For Excellence In The Preparation Of Teachers – An Overview, M. Enneking
Journal of Mathematics and Science: Collaborative Explorations
No abstract provided.
Peer-Led Team Learning In Introductory Biology And Chemistry Courses: A Parallel Approach, A. Tenney, B. Houck
Peer-Led Team Learning In Introductory Biology And Chemistry Courses: A Parallel Approach, A. Tenney, B. Houck
Journal of Mathematics and Science: Collaborative Explorations
Peer-Led Team Learning has been in use in Introductory Biology and Introductory Chemistry since Fall 1999 at the University of Portland. lts effect on improved conceptual understanding, retention of students, and improvement in study skills will be discussed. An ancillary, but no less important benefit in the development of interest in science teaching among the peer leaders, is also addressed.
Journal Of Mathematics And Science: Collaborative Explorations
Journal Of Mathematics And Science: Collaborative Explorations
Journal of Mathematics and Science: Collaborative Explorations
No abstract provided.
The Development Of Instruments For Assessment Of Instructional Practices In Standards-Based Teaching, C. L. Wainwright, L. Flick, P. Morrell
The Development Of Instruments For Assessment Of Instructional Practices In Standards-Based Teaching, C. L. Wainwright, L. Flick, P. Morrell
Journal of Mathematics and Science: Collaborative Explorations
We provide a description and rationale for the development of two instruments: 1) a classroom observation protocol; and, 2) a teacher interview protocol—designed to document the impact of reform-based professional development with undergraduate mathematics and science faculty, and its impact on the resultant preparation of teachers. Constructed upon review of the research on teaching and standards documents in mathematics and science, these instruments form the basis for data collection in a three-year longitudinal study of teaching practice among early career teachers as well as undergraduate college faculty. In addition, we suggest further applications of the observation protocol beyond the original …
A Descriptive Comparison Of One University Instructor's Instruction During Pre-Service Mathematics Courses And The Subsequent Mathematics And Science Instruction Of Three Of His Students During Their Student Teaching Experience, S. Blair
Journal of Mathematics and Science: Collaborative Explorations
No abstract provided.
Persistence In Mathematics By Underrepresented Students: Experiences Of A Math Excel Program, C. M. Hake, M. L. Crow, T. Dick
Persistence In Mathematics By Underrepresented Students: Experiences Of A Math Excel Program, C. M. Hake, M. L. Crow, T. Dick
Journal of Mathematics and Science: Collaborative Explorations
Success in mathematics by underrepresented and nontraditional college students is measured not only by academic performance (grades), but also by the continued participation and persistence of these students in mathematics coursework. The Math Excel program at Oregon State University attempts to build "learning communities" with a sharp academic focus in support of students concurrently taking introductory level mathematics courses. The Math Excel program is based heavily on Uri Treisman's Emerging Scholars Workshop model of collaborative problem solving. In this article, we examine the experience of minority students in the Educational Opportunities Program participating in the Math Excel program. While the …
Lessons Learned From Efforts At Institutional Change: Case Studies Of Six Ocept Institutions, T. G. Chenoweth, M. K. Kinnick, R. D. Walleri
Lessons Learned From Efforts At Institutional Change: Case Studies Of Six Ocept Institutions, T. G. Chenoweth, M. K. Kinnick, R. D. Walleri
Journal of Mathematics and Science: Collaborative Explorations
As one part of a multifaceted evaluation of the Oregon Collaborative for Excellence in the Preparation of Teachers (OCEPT), a case study approach was used to enable a deeper understanding of how a diverse group of six institutions attempted to achieve OCEPT goals and to learn more about factors that facilitated or hindered their efforts. Multiple sources of data were used, with heavy reliance on a series of on-site interviews. The analytical framework included a "depth" and "pervasiveness" typology of institutional change and a view of change as encompassing "meaning," "organization," and "effects." While goals and accomplishment levels, as well …
Geosciences For Elementary Educators: A Course Assessment, M. L. Cummings, M. Goodrich, D. Burmester
Geosciences For Elementary Educators: A Course Assessment, M. L. Cummings, M. Goodrich, D. Burmester
Journal of Mathematics and Science: Collaborative Explorations
Geosciences for Elementary Educators engages future elementary teachers in a hands-on investigation of topics aligned with the third and fifth grade Earth/Space Science and Scientific Inquiry benchmarks of the Oregon Content Standards. The course was designed to develop the content background of elementary teachers within the framework of the science described in the content standards, to provide an opportunity for future teachers to explore the content area in relation to what takes place in the classrooms of elementary schools, and to initiate a community of learners focused on teaching science to elementary students. The course focused on four themes: the …
Methods Of Smile: A Science Seminar Course In "Deliberate Education", E. Davis-Butts, R. Collay
Methods Of Smile: A Science Seminar Course In "Deliberate Education", E. Davis-Butts, R. Collay
Journal of Mathematics and Science: Collaborative Explorations
Oregon State University’s Science and Math Investigative Learning Experiences (SMILE) Program is an enrichment program for minority and underrepresented K-12 students. Through an eight-year iterative process, SMILE has developed and refined a science seminar course that allows undergraduate and master’s degree students to explore science enrichment for youth. Students enrolled in the course are engaged in teaching and learning as a community of learners with a focus on service learning. The intended audience for the course is those students who are interested in working in educational settings with youth—as classroom teachers, science/mathematics professionals engaged in precollege outreach, and the like. …
The Occurrence Of Reform Teaching Practice In Undergraduate Mathematics And Science Classes: The Students' Perspective, P. D. Morrell, J. B. Carroll
The Occurrence Of Reform Teaching Practice In Undergraduate Mathematics And Science Classes: The Students' Perspective, P. D. Morrell, J. B. Carroll
Journal of Mathematics and Science: Collaborative Explorations
No abstract provided.
The Use Of Traditional And Contemporary Instructional Strategies And Materials In The Elementary Mathematics Classroom, J. E. Riley
Journal of Mathematics and Science: Collaborative Explorations
Elementary school teachers were surveyed about the strategies and materials they use to teach elementary school mathematics. A list of twenty strategies and materials derived from the Changes in Content and Emphasis sections of the National Council of Teachers of Mathematics (NCTM) Curriculum and Evaluation Standards for School Mathematics were examined [1]. These strategies represent both contemporary and traditional approaches to the teaching of mathematics. Teachers were asked to respond to each survey item by indicating how often these strategies were used in their classrooms. The findings were compared to the goals of the NCTM Standards to assess how much …
Student Work Section, R. Howard
Student Work Section, R. Howard
Journal of Mathematics and Science: Collaborative Explorations
No abstract provided.
Mathematics From China To Virginia By Way Of Singapore, H. Kim, C. Wu, A. Xue, J. Boyd
Mathematics From China To Virginia By Way Of Singapore, H. Kim, C. Wu, A. Xue, J. Boyd
Journal of Mathematics and Science: Collaborative Explorations
Our article follows from an interesting concurrence of mathematical and educational lines. At least the concurrence seems so to us and we hope that those who read on will agree. The lines or streams are a joint minimester program at St. Catherine’s and St. Christopher‘s Schools, an interest in problem solving, and a Singapore connection. We shall describe the lines first and then describe the mathematics that we found at their intersection.
The Perfect Perspective: A Mathematical Analysis Of Perspective Using Tools Available To Middle School Students, W. Griffin
Journal of Mathematics and Science: Collaborative Explorations
This paper examines the basic properties of perspective drawings, the history of perspective drawings, and the basic mathematics of perspective. Using a side view and a top view of a three-dimensional projection, similar triangles can be used to find distances from the axes and vanishing point in a projection. By breaking the three-dimensional projection into two, two-dimensional planes, one can recreate projections based on actual figures, or create placements of figures in real space based on a projection. Using this method, one 'can change a projection based on the changing position of the vanishing point. This simple approach to perspective …
Aims & Scope
Journal of Mathematics and Science: Collaborative Explorations
No abstract provided.
Magnetic Properties Of Al, V, Mn, And Ru Impurities In Fe–Co Alloys, B. V. Reddy, S. C. Deevi, S. N. Khanna
Magnetic Properties Of Al, V, Mn, And Ru Impurities In Fe–Co Alloys, B. V. Reddy, S. C. Deevi, S. N. Khanna
Physics Publications
Theoretical studies on the magnetic properties of impurities in Fe–Co alloys have been carried out using a molecular-orbital approach within a gradient corrected density functional formalism. The defected alloy is modeled by a large cluster and the calculations on the ordered alloy are used to show that a cluster containing 67 atoms can provide quantitative information on the local magnetic moment. It is found that although bulk Al, V, and Ru are nonmagnetic, all the impurities carry finite moments. While Al and V impurities couple antiferromagnetically, Ru impurities couple ferromagnetically to the host sites. It is shown that the observed …
Nitrogen-Induced Magnetic Transition In Small Chromium Clusters, Q. Wang, Q. Sun, B. K. Rao, P. Jena, Y. Kawazoe
Nitrogen-Induced Magnetic Transition In Small Chromium Clusters, Q. Wang, Q. Sun, B. K. Rao, P. Jena, Y. Kawazoe
Physics Publications
Using density functional theory with generalized gradient approximation for exchange and correlation, we show that otherwise antiferromagnetically coupled chromium atoms in very small chromium clusters couple ferromagnetically when doped with a nitrogen atom, thus leading to giant magnetic moments. For example, the magnetic moment of Cr2N is found to be 9μBwhile that of Cr2 is 0μB. Strong bonding between Cr and N atoms brings about this magnetic transition. The Cr atoms nearest neighbor to N couple ferromagnetically with each other and antiferromagnetically with nitrogen. The significance of these results in understanding the ferromagnetic order in Cr-doped GaN is discussed.
H-Substituted Anionic Carbon Clusters Cnh- (N <= 10): Density Functional Studies And Experimental Observations, L. Pan, B. K. Rao, A. K. Gupta, G. P. Das, P. Ayyub
H-Substituted Anionic Carbon Clusters Cnh- (N <= 10): Density Functional Studies And Experimental Observations, L. Pan, B. K. Rao, A. K. Gupta, G. P. Das, P. Ayyub
Physics Publications
We have studied the interaction of hydrogen with small neutral and anionic carbon clusters using density functional calculations. The geometry, stability, and electronic structure of these clusters show an odd–even alternation originating in the bonding nature of the carbon atoms. Our mass spectrometric measurements of the abundance of CnH− (n⩽10) cluster anions produced by gas-feed Cs sputtering from different crystallographic forms of carbon display similar odd–even alternation with the even-n clusters being relatively more abundant. The calculated trend in the adiabatic electron affinities shows a behavior similar to the experimental abundance pattern. We discuss a possible partial suppression of …
Contents
Journal of Mathematics and Science: Collaborative Explorations
No abstract provided.
Atomic Structure, Binding Energy, And Magnetic Properties Of Iron Atoms Supported On A Polyaromatic Hydrocarbon, L. Senapati, S. K. Nayak, B. K. Rao, P. Jena
Atomic Structure, Binding Energy, And Magnetic Properties Of Iron Atoms Supported On A Polyaromatic Hydrocarbon, L. Senapati, S. K. Nayak, B. K. Rao, P. Jena
Physics Publications
The atomic structure, energetics, and properties of gas-phase cluster complexes containing coronene (C24H12) molecule and up to two iron atoms are studied for the first time using density functional theory and generalized gradient approximation for exchange and correlation. The geometries of the neutral and cationic iron–coronene complexes are optimized without symmetry constraint and by examining the possibility that iron atoms could occupy various sites via individual π or bridging interactions. In both neutral and cationic complexes a single Fe atom is found to preferentially occupy the on-top site above the outer ring, while two Fe atoms dimerize and reside on …
Afm, Cafm, And Efm Studies Of The Gan System, John C. Dickinson
Afm, Cafm, And Efm Studies Of The Gan System, John C. Dickinson
Theses and Dissertations
This thesis discusses a variety of techniques based on the atomic force microscope (AFM), and their application to the GaN materials system. In particular, the local conductivity and contact potential of surfaces have been measured using the techniques of Conductive AFM (CAFM) and Surface Potential Electric Force Microscopy (SPEFM), respectively. CAFM studies of GaN surfaces have revealed that prismatic planes around islands and pits on surfaces can lead to enhanced conductivity, which may be related to leakage problems in device applications. With regard to SP-EFM work, the change in surface potential associated with inversion domains on Ga-polar GaN has been …
Title Page
Journal of Mathematics and Science: Collaborative Explorations
No abstract provided.
Lessons Learned In A Math Excel Workshop: The Importance Of Maintaining High Cognitive Demands, T. Dick
Lessons Learned In A Math Excel Workshop: The Importance Of Maintaining High Cognitive Demands, T. Dick
Journal of Mathematics and Science: Collaborative Explorations
Uri Treisman's Emerging Scholars Workshop model has been implemented on many college campuses over the last twenty years. The Treisman model is based on groups of students meeting regularly in a social atmosphere to work collaboratively in solving challenging mathematics problems related to their introductory coursework. Emerging Scholars Programs (or Math Excel as it is called in many settings, including ours) have been particularly successful in increasing the academic success and participation of underrepresented groups in mathematics. The primary responsibilities of a workshop leader include the design of a session’s worksheet, as well as the facilitation of students' problem solving …
Making Upper Division Mathematics Courses Relevant For Pre-Service Teachers, G. Hill
Making Upper Division Mathematics Courses Relevant For Pre-Service Teachers, G. Hill
Journal of Mathematics and Science: Collaborative Explorations
This article addresses the disconnect that in-service and pre-service secondary school teachers feel between the material presented in upper division mathematics courses and high school classroom practice. Two examples are given from an abstract algebra course in which this problem is addressed.
Visualizing Basic Nuclear Reactions, D. Allen, M. T. Oliver-Hoyo
Visualizing Basic Nuclear Reactions, D. Allen, M. T. Oliver-Hoyo
Journal of Mathematics and Science: Collaborative Explorations
There are few instructional tools available to teach basic nuclear reactions to beginning students. The activity described in this paper can be used to help students visualize and write basic nuclear reactions such as alpha, beta, and positron decay, as well as electron capture. These reactions are represented using the technology of thermochromic paints, which either change color or turn colorless depending upon the temperature. By using a special thermochromic paint that turns colorless upon heating, students are able to visualize nuclear interactions. For instance, when positron decay occurs, the object depicting a proton will "decay" into a neutron by …
Understanding Teacher Reflection As A Significant Tool For Bringing Reform-Based Teaching To College Mathematics, K. Jeon
Journal of Mathematics and Science: Collaborative Explorations
This paper describes a senior mathematics professor’s effort to change his teaching practice in a mathematical analysis course for secondary pre-service teachers in alignment with the current reform movement. Data include semester-long observations and interviews with the professor and his students. The data were analyzed by the use of reflection as the most significant tool for examining his experience of bringing about change. The reflection was used as a bridge from theory to practice by serving as a significant point for the professor to experience the process of professional development in a real sense. Discussions include the role of teacher …
Recruiting More Mathematics Teachers Using Collaboration As The Main Ingredient: An Effective Model From Missouri, L. Kaiser
Journal of Mathematics and Science: Collaborative Explorations
A National Science Foundation grant was designed to develop a series of courses to connect mathematics concepts taught in middle school classes with actual class materials used at the middle school level; however, a second component of the grant focused on efforts to recruit more teachers into the field of mathematics. By collaborating with several groups across Missouri, several strategies were developed that were shown to have positive results, both in increasing awareness of mathematics teacher shortage issues, and in encouraging attendance in Missouri mathematics education programs. The strategies developed were easy to implement and low in cost. The Missouri …
Normal Mixture Models For Gene Cluster Identification In Two Dimensional Microarray Data, Eric Scott Harvey
Normal Mixture Models For Gene Cluster Identification In Two Dimensional Microarray Data, Eric Scott Harvey
Theses and Dissertations
This dissertation focuses on methodology specific to microarray data analyses that organize the data in preliminary steps and proposes a cluster analysis method which improves the interpretability of the cluster results. Cluster analysis of microarray data allows samples with similar gene expression values to be discovered and may serve as a useful diagnostic tool. Since microarray data is inherently noisy, data preprocessing steps including smoothing and filtering are discussed. Comparing the results of different clustering methods is complicated by the arbitrariness of the cluster labels. Methods for re-labeling clusters to assess the agreement between the results of different clustering techniques …
Resonance Two Photon Ionization Study Of Binary Clusters Of Styrene With Polar Molecules, Hatem Ahmed Mahmoud
Resonance Two Photon Ionization Study Of Binary Clusters Of Styrene With Polar Molecules, Hatem Ahmed Mahmoud
Theses and Dissertations
One-color resonance two-photo ionization (R2PI) spectra of mixed clusters of styrene molecule (S) with polar molecules [water (W), methanol (M), ethanol (E), and trifuoroethanol (T)] were measured through the S1←S0 transition of the styrene molecule. The spectra reveal a rapid increase in complexity with the number of polar molecules in the cluster, associated with van der Waal modes and isomeric forms. The spectral shifts of the cluster origins from the S1-S0 transition of the bare styrene molecule reflect the nature of the intermolecular interactions within the binary clusters. The obtained R2PI spectra xv were compared with the spectra of the …