Digital Commons Network^™

J-Resolved He I Emission Predictions In The Low-Density Limit, R. P. Bauman, R. L. Porter, Gary J. Ferland, K. B. Macadam

Physics and Astronomy Faculty Publications

Determinations of the primordial helium abundance are used in precision cosmological tests. These require highly accurate He I recombination rate coefficients. Here we reconsider the formation of He I recombination lines in the low-density limit. This is the simplest case, and it forms the basis for the more complex situation in which collisions are important. The formation of a recombination line is a two-step process, beginning with the capture of a continuum electron into a bound state and followed by radiative cascade to ground. The rate coefficient for capture from the continuum is obtained from photoionization cross sections and detailed …

The Perceptions Of High School Physical Educators On The Benefits Of Block Scheduling In The State Of Utah, Marilyn Miller

Theses and Dissertations

The purpose of this research was to examine the extent to which the block schedule is being used in Utah high school physical education, and determine teacher's perceptions of block scheduling in teaching physical education. Block scheduling is a new and more efficient way of organizing the school day. NASPE has found the following positive effects in block scheduling: a better learning environment, more access to stronger curriculum, detailed instruction and demonstrations, and more variety in assessment (NASPE, 2000). Although there were several different forms of the block schedule reported, it appears that a majority of physical educators have discovered …

Cosmic Rays From Gamma-Ray Bursts In The Galaxy, Charles Dennison Dermer, Jeremy M. Holmes

Aerospace, Physics, and Space Science Faculty Publications

The rate of terrestrial irradiation events by Galactic gamma-ray bursts (GRBs) is estimated using recent standard-energy results. We assume that GRBs accelerate high-energy cosmic rays, and we present results of three-dimensional simulations of cosmic rays moving in the Galactic magnetic field and diffusing through pitch-angle scattering. An on-axis GRB extinction event begins with a powerful prompt γ-ray and neutron pulse, followed by a longer lived phase from cosmic-ray protons and neutron-decay protons that diffuse toward Earth. Our results force a reinterpretation of reported ∼10¹⁸ eV cosmic-ray anisotropies and offer a rigorous test of the model in which high-energy cosmic rays …

Preservice Teachers’ Belief Development While Learning To Teach Writing In An Elementary Writing Methods Course, Karen S. Kelley

USF Tampa Graduate Theses and Dissertations

My study examined the belief development of three preservice teachers as they learned to teach writing in a one-semester elementary writing methods course. I also sought to identify significant episodes that contributed to the preservice teachers’ belief development. Two questions guided my inquiry: How do preservice teachers’ beliefs about writing and the teaching of writing develop while enrolled in an elementary writing methods course? and What episodes do preservice teachers, who are enrolled in an elementary writing methods course, view as significant in helping them negotiate their beliefs about writing and writing instruction? I collected survey data, conducted a series …

Fibonacci Vectors, Ena Salter

USF Tampa Graduate Theses and Dissertations

By the n-th Fibonacci (respectively Lucas) vector of length m, we mean the vector whose components are the n-th through (n+m-1)-st Fibonacci (respectively Lucas) numbers. For arbitrary m, we express the dot product of any two Fibonacci vectors, any two Lucas vectors, and any Fibonacci vector and any Lucas vector in terms of the Fibonacci and Lucas numbers. We use these formulas to deduce a number of identities involving the Fibonacci and Lucas numbers.

It's Happening At State: July 20, 2005

It's Happening at State

Provides summary information of news and events of interest to the faculty and staff of NDSU.

Sheep Updates 2005 - Part 6, Sarah Pugh, Giles Glasson, Ed Barrett-Lennard, Hayley Norman, Matt Wilmot, Meir Altman, Kelly Pearce, Sally Phelan, David Masters, Nadine Eva, Brad Wooldridge, Stephen Gherardi, Lucy Anderton, Gonzalo Mata, P. Sanford, J Young, Tim Wiley, Richard Quinlan, Chris Oldham, Mike Hyder, Mandy Curnow, Samantha Giles, Andrew Thompson

Sheep Updates

This session covers seven papers from different authors:

PASTURES/GRAZING

1. New annual pastures - quality and quantity for fodder conservation?, Sarah Pugh and Giles Glasson, Department of Agriculture Western Australia

2. Saltland Pastures: Dispelling some Myths, Ed Barrett-Lennard^1,3, Hayley Norman^2,3, Matt Wilmat^2,3, Meir Altman,³, Kelly Pearce^2,3, Sally Phelan⁴, David Masters^2,3, ^1. Department of Agriculture, Western Australia, ² CSIRO Livestock Industries, Floreat, WA, ³. CRC for Plant-based Management of Dryland Salinity ⁴. Saltland Pastures Association

3. Pastures: Putting profit back into sandplain, Nadine Eva, Department …

The Discretized Schr ¨ Odinger Equation For The Finite Square Well And Its Relationship To Solid-State Physics, Timothy B. Boykin, Gerhard Klimeck

Birck and NCN Publications

The discretized Schr¨odinger equation is most often used to solve onedimensional quantum mechanics problems numerically. While it has been recognized for some time that this equation is equivalent to a simple tightbinding model and that the discretization imposes an underlying bandstructure unlike free-space quantum mechanics on the problem, the physical implications of this equivalence largely have been unappreciated and the pedagogical advantages accruing from presenting the problem as one of solid-state physics (and not numerics) remain generally unexplored. This is especially true for the analytically solvable discretized finite square well presented here. There are profound differences in the physics of …

The Discretized Schroedinger Equation For The Finite Square Well And Its Relationship To Solid-State Physics, Timothy B. Boykin, Gerhard Klimeck

Other Nanotechnology Publications

The discretized Schr¨odinger equation is most often used to solve onedimensional quantum mechanics problems numerically. While it has been recognized for some time that this equation is equivalent to a simple tightbinding model and that the discretization imposes an underlying bandstructure unlike free-space quantum mechanics on the problem, the physical implications of this equivalence largely have been unappreciated and the pedagogical advantages accruing from presenting the problem as one of solid-state physics (and not numerics) remain generally unexplored. This is especially true for the analytically solvable discretized finite square well presented here. There are profound differences in the physics of …

The Discretized Schrödinger Equation For The Finite Square Well And Its Relationship To Solid-State Physics, Timothy B. Boykin, Gerhard Klimeck

Birck and NCN Publications

The discretized Schrödinger equation is most often used to solve onedimensional quantum mechanics problems numerically. While it has been recognized for some time that this equation is equivalent to a simple tightbinding model and that the discretization imposes an underlying bandstructure unlike free-space quantum mechanics on the problem, the physical implications of this equivalence largely have been unappreciated and the pedagogical advantages accruing from presenting the problem as one of solid-state physics (and not numerics) remain generally unexplored. This is especially true for the analytically solvable discretized finite square well presented here. There are profound differences in the physics of …

Investigation Of Geometrical Effects On Microneedle Geometry For Transdermal Applications, Smitha Shetty

USF Tampa Graduate Theses and Dissertations

Hollow biocompatible microneedle arrays were designed and fabricated using two different bulk micromachining techniques-Deep Reactive Ion Etching and Coherent Porous Silicon technology to investigate their reliability for transdermal applications. An in-house experimental setup was developed for microneedle fracture and split thickness penetration force measurements. Out of plane needle array configurations (100and#956;m needle length) with intra array geometric variations including needle shape, diameter, intra-array pitch and density (1a 625) were characterized on cadaver skin to predict skin barrier penetration without fracture. Use of microneedle array as transdermal patch necessitates reliable penetration and not just pushing against stratum corneum like a bed …

Red Rock Desert Learning Center Core Group Meeting: July 19, 2005, Red Rock Desert Learning Center

Reports (RRLC)

1. Introductions & Announcements (5 min.)
2. Approval of Minutes from May 17, 2005 Meeting (5 min.)
3. Update on NEPA Process – Michael Johnson & Otak (30 min.)
   A. Overview of NEPA Process C. Status of interim EA report
   B. EA Timeline Schedule D. Status of cultural treatment plan
4. Matrix of Project Concerns and Resolutions – Michael Reiland (15 min.)
5. Review of Project Timeline Schedule – Michael Reiland (10 min.)
   A. Status of Request for Proposals C. Status of Nevada Power Grid
   B. Status of Water Options
6. Curriculum Development – Jeannie Klockow (10 min.)
   A. Wild Horse & Burro Curriculum
7. Community Outreach …

Probability Theory On Semihypergroups, Norbert Youmbi

USF Tampa Graduate Theses and Dissertations

Motivated by the work of Hognas and Mukherjea on semigroups,we study semihypergroups, which are structures closer to semigroups than hypergroups in the sense that they do not require an identity or an involution. Dunkl[Du73] calls them hypergroups (without involution), and Jewett[Je75] calls them semiconvos. A semihypergroup does not assume any algebraic operation on itself. To generalize results from semigroups to semihypergroups, we first put together the fundamental algebraic concept a semihypergroup inherits from its measure algebra. Among other things, we define the Rees convolution product, and prove that if X; Y are non-empty sets and H is a hypergroup, then …

Linear Regression Of Censored Length-Biased Lifetimes, Ying Qing Chen, Yan Wang

UW Biostatistics Working Paper Series

Length-biased lifetimes may be collected in observational studies or sample surveys due to biased sampling scheme. In this article, we use a linear regression model, namely, the accelerated failure time model, for the population lifetime distributions in regression analysis of the length-biased lifetimes. It is discovered that the associated regression parameters are invariant under the length-biased sampling scheme. According to this discovery, we propose the quasi partial score estimating equations to estimate the population regression parameters. The proposed methodologies are evaluated and demonstrated by simulation studies and an application to actual data set.

Structure And Development Of Pitch Canker Infected Monterey Pine Stands At Año Nuevo, California, Douglas D. Piirto, Sauli Valkonen

Natural Resources Management and Environmental Sciences

The sustainability of indigenous Monterey pine (Pinus radiata D. Don)at Ano Nuevo stands in the central coast of California was examined. The foremost management objective in these stands is to establish and maintain stand structures that ensure a sustainable presence of the species in terms of uneven-aged management. The major threats are the proliferation of shade-tolerant tree species and the pitch canker ( Fusarium circinatum) disease. The study was based on data from 17 systematically placed sample plots, measured once, in one stand with a very high degree of variation in stand structure and species composition. The results …

Relationship Between Course-Taking Behavior, Gender, And Mathematics Achievement On The Missouri Assessment Program (Map), Geraldine Dressel Baumgart

Dissertations

This study examined the relationship between student course taking, specifically the year of Algebra completion (grade 8, 9, 10, or not completed), and performance on the Missouri Assessment Program (MAP) mathematics test in grades 8 and 10. Data collected were student scores on the MAP tests, TerraNova tests in Communication Arts and Mathematics, student math grades, and demographic factors of gender and race. The sample of 512 students was taken from one school district in east central Missouri.

The MAP mathematics tests contain 3 item types. Item type was statistically significant with both males and females scoring highest on Multiple …

Grand Valley Forum, Volume 030, Number 02, July 18, 2005, Grand Valley State University

2005-2006, Volume 30

Grand Valley Forum is Grand Valley State's faculty and staff newsletter, published from 1976 to the present.

July 18 2005 Reporter, University Of Alabama At Birmingham

eReporter (campus newsletter)

No abstract provided.

Hard-Sphere Radial Distribution Function Again, Andrij Trokhymchuk, Douglas Henderson, Ivo Nezbeda, Jan Jirsak

Faculty Publications

A theoretically based closed-form analytical equation for the radial distribution function, g(r), of a fluid of hard spheres is presented and used to obtain an accurate analytic representation. The method makes use of an analytic expression for the short- and long-range behaviors of g(r), both obtained from the Percus-Yevick equation, in combination with the thermodynamic consistency constraint. Physical arguments then leave only three parameters in the equation of g(r) that are to be solved numerically, whereas all remaining ones are taken from the analytical solution of the Percus-Yevick equation.

Dose Time Response Modeling Of Neurobehavioral Screening Data: Application Of Physiologically Relevant Parameters To Allow For Dose Dependent Time Of Peak Effects, Michael Raymond Wessel

USF Tampa Graduate Theses and Dissertations

In collaboration with the United States Environmental Protection Agency (USEPA), the University of South Florida Health Risk Methodology Group has developed dose-time-response models to characterize neurobehavioral response to chemical exposure. The application of dose-time-response models to neurobehavioral screening tests on laboratory animals allows for benchmark dose estimation to establish exposure limits in environmental risk assessment. This thesis has advanced dose-time-response modeling by generalizing a published toxico diffusion model to allow for dose dependent time of peak effects. To accomplish this, a biphasic model was developed which adopted the effect compartment model paradigm used in pharmacokinetics/pharmacodynamics to estimate a distributional rate …

Reconstructing Writer Identities, Student Identities, Teacher Identities, And Gender Identities: Chinese Graduate Students In America, Peiling Zhao

USF Tampa Graduate Theses and Dissertations

The increasing presence of Chinese international graduate students in American higher education has mandated a closer examination of their multifaceted lives against stereotypes that hinder their efforts to find, transform, or assert their identities in the dominant discourses of American academia and culture.

Cross cultural studies of Chinese international students tend to reinforce stereotypes of their writer identities, learner identities, and teacher identities. Examining these various identities discloses dichotomies that read Chinese students’ traits and behaviors as handicaps and thus characterize them as “abnormal” in relation to the “normal” traits and behaviors of Chinese students’ Western counterparts. Whereas Western student …

The Murray Ledger And Times, July 18, 2005, The Murray Ledger And Times

The Murray Ledger & Times

No abstract provided.

Peer-To-Peer Discovery Of Semantic Associations, Matthew Perry, Maciej Janik, Cartic Ramakrishnan, Conrad Ibanez, I. Budak Arpinar, Amit P. Sheth

Kno.e.sis Publications

The Semantic Web vision promises an extension of the current Web in which all data is annotated with machine understandable metadata. The relationship-centric nature of this data has led to the definition of Semantic Associations, which are complex relationships between resources. Semantic Associations attempt to answer queries of the form “how are resource A and resource B related?” Knowing how two entities are related is a crucial question in knowledge discovery applications. Much the same way humans collaborate and interact to form new knowledge, discovery of Semantic Associations across repositories on a peer-to-peer network can allow peers to share their …

Visible And Near-Infrared Responsivity Of Femtosecond Laser-Structured Photodiodes, J. E. Carey, Catherine Hirshfeld Crouch, M. Y. Shen, E. Mazur

Physics & Astronomy Faculty Works

We investigated the current-voltage characteristics and responsivity of photodiodes fabricated with silicon that was microstructured by use of femtosecond-laser pulses in a sulfur-containing atmosphere. The photodiodes that we fabricated have a broad spectral response ranging from the visible to the near infrared (400-1600 nm). The responsivity depends on substrate doping, microstructuring fluence, and annealing temperature. We obtained room-temperature responsivities as high as 100 A/W at 1064 nm, 2 orders of magnitude higher than for standard silicon photodiodes. For wavelengths below the bandgap we obtained responsivities as high as 50 mA/W at 1330 nm and 35 mA/W at 1550 nm.

Ua1b2/1/5 Oral History, Paula Trafton, Charles Anderson

WKU Administration Documents

Interview conducted by Paula Trafton with Charles Anderson, retired Vice President for Information Technology.

Alphabetical Index To Vertebrate Pest Conference Proceedings, Volumes 1–21 (1962–2004)

Vertebrate Pest Conference Proceedings: Indexes

This is a 62-page (searchable) document. Listings show all authors (arranged by 1st author), full titles, and complete citations.

Date Index To Vertebrate Pest Conference Proceedings, Volumes 1–21 (1962–2004)

Vertebrate Pest Conference Proceedings: Indexes

This is a 64-page (searchable) document. Listings are by conference year, alphabetical by 1st author, and show all authors, full titles, and complete citations.

Subject Index To Vertebrate Pest Conference Proceedings, Volumes 1–21 (1962–2004)

Vertebrate Pest Conference Proceedings: Indexes

This is a 409-page (searchable) document. Listings are by subjects, arranged alphabetically, and show all authors, full titles, and complete citations.

High Speed Flight At Low Altitude: Hazard To Commercial Aviation ?, Paul F. Eschenfelder , Capt.

Bird Strike Committee-USA/Canada Joint Annual Meeting: 7th (2005)

Commercial aircraft are capable of, and in fact, do, operate at high speed (>250 knots indicated airspeed [KIAS]) at low altitude (below 10,000’ above ground level) worldwide. Design, construction and certification standards for these aircraft were developed over 40 years ago. Since the development of these standards populations of large flocking birds have increased dramatically in many parts of the world. Yet neither design/construction standards nor operational practice have changed to reflect the new threat. Subsequent serious damage resulting from recent collisions indicates change is necessary. Since 2003, flight rules in Canada and the United States have been amended, …

Biofilm Removal Using Bubbles And Sound, Michael R. Parini

Theses and Dissertations

Bacteria in biofilms adhere well to surfaces and are quite difficult to remove. Oral plaque is one example of a biofilm. Many researchers have studied ways to remove plaque and bacteria from surfaces. It has been found that the passage of a bubble across a surface to which bacteria has adhered can remove the bacteria from the surface. Biofilms of Streptococcus mutans were grown on glass coverslips as a simple model for oral plaque. The coverslips were mounted in a Plexiglas chamber filled with artificial saliva. A bubble stream was directed at the mounted biofilm. The velocity, gas fraction, median …