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Crystalline Particle Packings On A Sphere With Long Range Power Law Potentials, Mark Bowick, Angelo Cacciuto, David R. Nelson, Alex Travesset

Physics - All Scholarship

The original Thomson problem of "spherical crystallography" seeks the ground state of electron shells interacting via the Coulomb potential; however one can also study crystalline ground states of particles interacting with other potentials. We focus here on long range power law interactions of the form 1/r^gamma (0 < \gamma < 2), with the classic Thomson problem given by gamma=1. At large R/a, where R is the sphere radius and a is the particle spacing, the problem can be reformulated as a continuum elastic model that depends on the Young's modulus of particles packed in the plane and the universal (independent of the pair potential) geometrical interactions between disclination defects. The energy of the continuum model can be expressed as an expansion in powers of the total number of particles, M sim (R/a)^2, with coefficients explicitly related to both geometric and potential-dependent terms. For icosahedral configurations of twelve 5-fold disclinations, the first non-trivial coefficient of the expansion agrees with explicit numerical evaluation for discrete particle arrangements to 4 significant digits; the discrepancy in the 5th digit arises from a contribution to the energy that is sensitive to the particular icosadeltahedral configuration and that is neglected in the continuum calculation. In the limit of a very large number of particles, an instability toward grain boundaries can be understood in terms of a "Debye{--}Huckel" solution, where dislocations have continuous Burgers' vector "charges". Discrete dislocations in grain boundaries for intermediate particle numbers are discussed as well.

Expanding The Use Of Cellular Automata, Joseph Bertles

Computer Science Honors Theses

Cellular automata are a type of simulation based upon dividing space into cells. More specifically, cellular automata are characterized by parallelism, locality, and homogeneity. A simulation is run by conducting a series of updates, consisting of running a set of rules that all cells follow. The rules typically consist of looking at a cell's immediate neighbors and/or itself to determine what will be in the cell at the next step. The rules are applied to all the cells at exactly the same time in exactly the same manner. The use of cellular automata has been limited to computer scientists, those …

Wsu Board Of Trustees Meeting Minutes, September 29-30, 2005

Board of Trustees Minutes

Minutes from the Wright State University Board of Trustees Meeting held on September 29-30, 2005.

The Importance Of Mental Calculation Skills: A Review Of The Literature, Robert Gusty

Theses

This paper reviewed research related to phonological awareness in deaf and hearing individuals. A number of studies showed that individuals skilled in memory tasks and reading achievement utilize a phonological voice. Often referred to as inner voice or the articulatory loop, phonology was used by both hearing and deaf individuals considered to be skilled readers. The evidence also shows that the use of phonology for coding information is related to the ability to use memory efficiently. As reading achievement is very important in a deaf child's education, so is mathematics. Compared to hearing students, deaf students do not perform at …

Third Grade Retention And The Florida Comprehensive Assessment Test: An Exploratory Study, Heather A. Powell

USF Tampa Graduate Theses and Dissertations

Literacy is a growing national concern, resulting in federal legislation (e.g., No Child Left Behind Act) instituting higher accountability for states and schools with regard to reading instruction and remediation. As a result, Floridas statewide measure of achievement, the Florida Comprehensive Assessment Test (FCAT) is now tied to retention decisions in third grade as part of the new pupil progression plan in the state. In its first year of implementation (2003), 23% of third-grade students failed the FCAT and over 28,000 were retained.

Research has consistently shown retention to be a negative experience for children; even when academic gains are …

The Montclarion, September 29, 2005, The Montclarion

The Montclarion

Student Newspaper of Montclair State University

The George-Anne, Georgia Southern University

The George-Anne

• What Could Make this Crosswalk Safer?
• News
• National News
• Sports
• Classifieds
• Hiatus

The Murray Ledger And Times, September 29, 2005, The Murray Ledger And Times

The Murray Ledger & Times

No abstract provided.

Preparing Teachers To Create A Mainstream Science Classroom Conducive To The Needs Of English-Language Learners: A Feminist Action Research Project, Gayle A. Buck, Colette Mast, Nancy Ehlers, Elizabeth Franklin

Department of Teaching, Learning, and Teacher Education: Faculty Publications

A feminist action research team, which consisted of a science educator, an English-language learner (ELL) educator, a first-year science teacher, and a graduate assistant, set a goal to work together to explore the process a beginning teacher goes through to establish a classroom conducive to the needs of middle-level ELL learners. The guiding questions of the study were answered by gathering a wealth of data over the course of 5 months and taken from the classroom, planning sessions, and researchers and students. These data were collected by observations, semistructured interviews, and written document reviews. The progressive analysis ultimately revealed that: …

A Forced March For Failing Schools: Lessons From The New York City Chancellor's District, Deinya Phenix, Dorothy Siegel, Ariel Zaltsman, Norm Fruchter

Education Policy Analysis Archives (EPAA)

In the mid-nineties, the New York City Schools Chancellor created a citywide improvement zone to take over a significant proportion of the city’s lowest performing schools whose local community school districts had failed to improve them. This “Chancellor’s District” defined centralized management, rather than local control, as the critical variable necessary to initiate, enforce and ensure the implementation of school improvement. This large-scale intervention involved both a governance change and a set of capacity-building interventions presumably unavailable under local sub-district control. Our study retrospectively examined the origins, structure and components of the Chancellor’s District, and analyzed the characteristics and outcomes …

Senate Meeting, September 28. 2005, Academic Senate

Academic Senate Minutes

No abstract provided.

Final Remarks At The Coordinating Board, George C. Wright

President Emeritus George C. Wright Speeches

No abstract provided.

Education Policy Analysis Archives 13/40 , Arizona State University, University Of South Florida

College of Education Publications

Forced march for failing schools : lessons from the New York City Chancellor's district / Deinya Phenix, Dorothy Siegel, Ariel Zaltsman [and] Norm Fruchter.

The Weekly Challenger, September 28, 2005, The Weekly Challenger, Et Al

Weekly Challenger Newspaper Collection

The September 28, 2005, issue of The Weekly Challenger.

Limits Of Quintessence, R. R. Caldwell, Eric V. Linder

Dartmouth Scholarship

We present evidence that the simplest particle-physics scalar-field models of dynamical dark energy can be separated into distinct behaviors based on the acceleration or deceleration of the field as it evolves down its potential towards a zero minimum. We show that these models occupy narrow regions in the phase plane of w and w′, the dark energy equation of state and its time derivative in units of the Hubble time. Restricting an energy scale of the dark energy microphysics limits how closely a scalar field can resemble a cosmological constant. These results, indicating a desired measurement resolution of order σ(w′)≈(1+w), …

The Bates Student - Volume 135 Number 03 - September 27, 2005, Bates College

The Bates Student

No abstract provided.

Development Of Database And Web Site For D3multisport, Jay Garrison

Regis University Student Publications (comprehensive collection)

Before this project, D3Multisport.com did not have a software application to track and monitor personal and progress information on athletes training for triathlon events. The previous process was manual, and although it helped provide a training schedule for an athlete it required the data be updated by hand. The process of developing a training program on an excel spreadsheet provided a good basis for the athlete to start the program, but was not suited to make dynamic adjustments if not optimally suited for the athlete. The application created in this project was designed to keep a coach updated on the …

Faculty Senate Meeting Minutes, 09/27/2005, P 131-142, Unm Faculty Senate

Faculty Senate Meeting Minutes, 1920 - 2013

No abstract provided.

Faculty Senate Summarized Minutes, 9/27/2005, Unm Faculty Senate

Faculty Senate Meeting Minutes, 1920 - 2013

No abstract provided.

Mammalogy At Texas Tech University: A Historical Perspective, Lisa C. Bradley, John R. Suchecki, Brian R. Amman, Joel G. Brant, Hugh H. Genoways, L. Rex Mcaliley, Robert J. Baker, Francisca Mendez-Harclerode, Robert D. Bradley

University of Nebraska State Museum: Mammalogy Papers

The mammalogy program at Texas Tech University officially was established in 1962, when Robert L. Packard joined the faculty of the Department of Biological Sciences. As the institution's first mammalogist, Packard took the initiative to develop a strong program of mammalian research and education. Influenced by the successful program built by his mentor, E. Raymond Hall, at the University of Kansas, Packard modeled similar goals for Texas Tech University. Those goals included a strong emphasis on both undergraduate and graduate education and research, with several mammalogy faculty members, and the establishment and growth of a large and active mammal collection.

Hs 2331+3905: The Cataclysmic Variable That Has It All, S. Araujo-Betancor, B. T. Gänsicke, H.-J. Hagen, T. R. Marsh, E T. Harlaftis, J Thorstensen

Dartmouth Scholarship

We report detailed follow-up observations of the cataclysmic variable HS 2331+3905, identified as an emission- line object in the Hamburg Quasar Survey. An orbital period of 81.08 min is unambiguously determined from the detection of eclipses in the light curves of HS 2331+3905. A second photometric period is consistently detected at P ≃ 83.38 min, ∼2.8% longer than Porb, which we tentatively relate to the presence of permanent superhumps. High time resolution photometry exhibits short-timescale variability on time scales of ≃5−6 min which we interpret as non-radial white dwarf pulsations, as well as a coherent signal at 1.12 min, which …

Minutes_05_09_27, Unm Faculty Senate

Faculty Senate Meeting Minutes, 1920 - 2013

Minutes from the September 27th, 2005 Faculty Senate meeting.

Arbiter, September 26, Students Of Boise State University

Student Newspapers

No abstract provided.

Marginal Regression Modeling Under Irregular, Biased Sampling, Petra Buzkova, Thomas Lumley

UW Biostatistics Working Paper Series

In longitudinal studies observations are often obtained at continuous subject-specific times. Frequently the availability of outcome data may be related to the outcome measure or other covariates that are related to the outcome measure. Under such biased sampling designs unadjusted regression analysis yield biased estimates. Building on the work of Lin & Ying (2001) that integrates counting processes techniques with longitudinal data settings we propose a class of estimators that can handle biased sampling. We call those estimators ``inverse--intensity--rate--ratio--weighted'' (IIRR) estimators. Of major focus is a mean--response model where we examine the marginal effect of the covariate X at time …

Longitudinal Data Analysis For Generalized Linear Models Under Irregular, Biased Sampling: Situations With Follow-Up Dependent On Outcome Or Auxiliary Outcome-Related Variables, Petra Buzkova, Thomas Lumley

UW Biostatistics Working Paper Series

In longitudinal studies, observations are often obtained at subject-specific observation times. Those times can be continuous times, not at a set of prespecified times. Frequently the observation times may be related to the outcome measure or other auxiliary variables that are related to the outcome measure but undesirable to condition upon in the regression model for outcome. Regression analysis unadjusted for such sampling designs yield biased estimates. Based on estimating equations, we propose a class of estimators in generalized linear regression models that can handle biased sampling under continuous observation times. We call those estimators ``inverse--intensity rate--ratio--weighted'' (IIRR) estimators. The …

Semiparametric Loglinear Regression For Longitudinal Measurements Subject To Irregular, Biased Follow-Up, Petra Buzkova, Thomas Lumley

UW Biostatistics Working Paper Series

We propose a method for analysis of loglinear regression models for longitudinal data that are subject to continuous and irregular follow-up. Frequently, if the follow-up is irregular, the availability of outcome data may be related to the outcome measure or other covariates that are related to the outcome measure. Under such biased sampling designs unadjusted regression analysis yield biased estimates. We examine the marginal association of the covariates X at time t and the logarithm of the mean of response Y at time t. We focus on semiparametric regression with unspecified baseline function of time. To predict the follow-up times …

The Statesman, V. 49, I. 08, Stony Brook University

Stony Brook Statesman-Sucolian

v. 49, i. 08

Continuations From Generalized Stack Inspection, Greg Pettyjohn, John Clements, Joe Marshall, Shriram Krishnamurthi, Matthias Felleisen

Computer Science and Software Engineering

Implementing first-class continuations can pose a challenge if the target machine makes no provisions for accessing and re-installing the run-time stack. In this paper, we present a novel translation that overcomes this problem. In the first half of the paper, we introduce a theoretical model that shows how to eliminate the capture and the use of first-class continuations in the presence of a generalized stack inspection mechanism. The second half of the paper explains how to translate this model into practice in two different contexts. First, we reformulate the servlet interaction language in the PLT Web server, which heavily relies …

A Facile Synthesis Of (Tert-Alkoxy)Amines, Hasan Palandoken, Chris M. Bocian, Michelle R. Mccombs, Michael H. Nantz

Chemistry and Biochemistry

Tertiary alcohols react with stoichiometric BF₃·Et₂O and N-hydroxyphthalimide to yield N-alkoxyphthalimides. Subsequent hydrazinolyses afford the title compounds.

Metal Hybridization And Electronic Structure Of Tris(8-Hydroxyquinolato)Aluminum (Alq3), Anthony N. Caruso, D. L. Schulz, Peter A. Dowben

Peter Dowben Publications

The metal-organic complex Tris(8-hydroxyquinolato)aluminum (Alq₃) has been studied by energy and light polarization dependent photoemission. Resonant photoemission was used to identify the molecular orbitals involved in metal chelation. When adsorbed on cobalt and gold surfaces, marked differences in the Alq₃ metal-to-ligand bonds were observed. The results indicate intramolecular aluminum-to-ligand bonding through the oxygen heteroatom when Alq₃ is adsorbed on gold, but through the nitrogen heteroatom when on cobalt. These results indicate that substrate interfacial complex formation plays an important role in the Alq₃ molecular configuration and intramolecular bonding.