Digital Commons Network^™

Jack Butler Donates Collection To J. D. Williams Library, Elaine Pugh, Lydia Hailman

University of Mississippi News

OXFORD, Miss. - Mississippi has a tradition of producing fine writers, and one of its native sons recently donated his collection of literary materials to the University of Mississippi.

Msbayes: Pipeline For Testing Comparative Phylogeographic Histories Using Hierarchical Approximate Bayesian Computation, Michael J. Hickerson, Eli Stahl, Naoki Takebayashi

Publications and Research

Background Although testing for simultaneous divergence (vicariance) across different population-pairs that span the same barrier to gene flow is of central importance to evolutionary biology, researchers often equate the gene tree and population/species tree thereby ignoring stochastic coalescent variance in their conclusions of temporal incongruence. In contrast to other available phylogeographic software packages, msBayes is the only one that analyses data from multiple species/population pairs under a hierarchical model. Results msBayes employs approximate Bayesian computation (ABC) under a hierarchical coalescent model to test for simultaneous divergence (TSD) in multiple co-distributed population-pairs. Simultaneous isolation is tested by estimating three hyper-parameters that …

An Integrated Water Quality Modeling System With Dynamic Remote Sensing Feedback, Yan Li

Theses

A coupled hydrodynamic-optical water quality modeling system based on Dynamic Data Driven Applications Systems (DDDAS) concepts that assimilates remote sensing data into a hydrodynamic model was developed and tested. The modeling system includes the hydrodynamic model (ALGE), a radiative transfer model (Hydrolight), and remote imagery (MODIS) as a dynamic feedback. The DDDAS was implemented through an Ensemble Kalman Filter (EnKF) with a small ensemble space. Large scale thermal structure and circulation patterns in Lake Ontario were simulated during the spring and summer seasons. High-resolution stream plume studies were performed in Conesus Lake and for the plume of the Niagara River …

A Censored Multinomial Regression Model For Perinatal Mother To Child Transmission Of Hiv, Charlotte C. Gard, Elizabeth R. Brown

UW Biostatistics Working Paper Series

In studies designed to estimate rates of perinatal mother to child transmission of HIV, HIV assays are scheduled at multiple points in time. Still infection status for some infants at some time points is often unknown, particularly when interim analyses are conducted. Logistic regression and Cox proportional hazards regression are commonly used to estimate covariate-adjusted transmission rates, but their methods for handling missing data may be inadequate. Here, we propose using censored multinomial regression models to estimate cumulative and conditional rates of HIV transmission. Through simulation, we show that the proposed methods perform better than standard logistic models in terms …

Interview With Rabbi Bernie Raskas, Professor Of Religious Studies, Bernie Raskas

Religious Studies Department Oral Histories

No abstract provided.

Semantic Web: Promising Technologies And Current Applications In Health Care & Life Sciences, Amit P. Sheth

Kno.e.sis Publications

No abstract provided.

Bette And Will White Oral History Interview With Spencer Fleury And Todd Chavez, July 25, 2007, Elizabeth L. White (Interviewee), William B. White (Interviewee), Spencer Fleury (Interviewer), Todd Chavez (Interviewer)

Environmental Sustainability Oral Histories

The Drs. White take turns discussing how they became interested in karst science. They reflect on the days when public opinion marginalized karst science and offer what they perceive as the historical factors which have allowed it to become established as a stand-alone scientific discipline. They then discuss students who have worked with them on various karst projects. Dr. Will White tells the story of the haunted telephone from Crystal Cave in Kentucky. The interviewees then discuss the relationship between professional karst scientists and the amateur, recreational caving community. They also discuss the future of karst science specifically with relation …

Explaining Subjective Risks Of Hurricanes And The Role Of Risks In Intended Moving And Location Choice Models, Justin Baker Et Al.

2007

In this manuscript we report on findings from a quasi-field experiment of a small group of subjects displaced by the 2005 hurricanes, Katrina and Rita. The sampled group, though small, is remarkable in that they all were deeply and personally affected by the hurricanes. All of the people in our sample evacuated from their homes and were still away months after the hurricane. The homes of a majority of the sample were severely damaged and almost a third of the sample lost a family member in the hurricane. Our research evaluates the risk perceptions and explains stated intentions to move …

Interview With Kathy & Matt Unger, Unger Farms, 2007 (Audio), Kathy Unger, Matt Unger

All Sustainability History Project Oral Histories

Interview of Kathy and Matt Unger by Alix Lefler at Cornelius, Oregon on July 25th, 2007.

The interview index is available for download.

Polarization Control Of Direct (Non-Sequential) Two-Photon Double Ionization Of He, Evgeny A. Pronin, N. L. Manakov, S. I. Marmo, Anthony F. Starace

Anthony F. Starace Publications

An ab initio parametrization of the doubly-differential cross section (DDCS) for two-photon double ionization (TPDI) from an s² subshell of an atom in a ¹S₀-state is presented. Analysis of the elliptic dichroism (ED) effect in the DDCS for TPDI of He and its comparison with the same effect in the concurrent process of sequential double ionization shows their qualitative and quantitative differences, thus providing a means to control and to distinguish sequential and non-sequential processes by measuring the relative ED parameter.

Exohedral Silicon Fullerenes: SiNPtN/2 (20≤N≤60), Yong Pei, Yi Gao, Xiao Cheng Zeng

Xiao Cheng Zeng Publications

Using density functional theory method we show that hollow silicon fullerene cages, Si_N(20≤N≤60), can be fully stabilized by exohedrally coated platinum atoms (Pt_N/2), denoted as Si_NPt_N/2. The exohedral coating Pt_N/2 passivates the dangling bonds of the silicon cages, thereby making the silicon cages Si_N to retain the symmetry and structure of homologous carbon fullerenes C_N. In particular, the I_h symmetrical, 60-atom silicon buckminsterfullerene cage (Si60) can be fully stabilized by exohedrally coated 30 Pt atoms. Properties of Si_NPt_{N/2 …}

Bedrock Channel Geometry Along An Orographic Rainfall Gradient In The Upper Marsyandi River Valley In Central Nepal, William Craddock, Douglas Burbank, Bodo Bookhagen, Emmanuel Gabet

Faculty Publications

Pronounced rainfall gradients combined with spatially uniform exhumation of rocks at Quaternary timescales and uniform rock strength make the upper Marsyandi River valley in central Nepal a useful natural laboratory in which to explore variations in bedrock channel width. We focus on small catchments (0.6–12.4 km2) along a more than tenfold gradient in monsoon rainfall. Rainfall data are gathered from a dense weather network and calibrated satellite observations, the pattern of Quaternary exhumation is inferred from apatite fission track cooling ages, and rock compressive strength is measured in the field. Bedrock channel widths, surveyed at high scour indicators, scale as …

Relaxin As A Diagnostic Tool For Pregnancy In The Coyote (Canis Latrans), Debra A. Carlson, Eric M. Gese

United States Department of Agriculture Wildlife Services: Staff Publications

The diagnosis of pregnancy in the domestic dog (Canis familiaris) often employs specialized equipment, experienced staff, and the cooperation of the bitch. These procedures can be challenging when the subject is a wild canid, particularly in a field setting. In addition, reproductive hormone assays are unreliable as a diagnostic tool because the estrous profiles of pregnant and pseudopregnant canines are similar. However, research has demonstrated that the hormone relaxin can be detected in maternal blood after embryonic implantation, but remains negligible in non-pregnant females. We investigated the use of relaxin as a diagnostic marker of pregnancy in the …

An Example Of How To Write The Statistical Section Of A Bioequivalence Study Protocol For Fda Review, William F. Mccarthy

COBRA Preprint Series

This paper provides a detailed example of how one should write the statistical section of a bioequivalence study protocol for FDA review. Three forms of bioequivalence are covered: average bioequivalence (ABE), population bioequivalence (PBE) and individual bioequivalence (IBE). The method of analysis is based on Jones and Kenward (2003) and a modification of their SAS Macro is provided.

Empirical Efficiency Maximization, Daniel B. Rubin, Mark J. Van Der Laan

U.C. Berkeley Division of Biostatistics Working Paper Series

It has long been recognized that covariate adjustment can increase precision, even when it is not strictly necessary. The phenomenon is particularly emphasized in clinical trials, whether using continuous, categorical, or censored time-to-event outcomes. Adjustment is often straightforward when a discrete covariate partitions the sample into a handful of strata, but becomes more involved when modern studies collect copious amounts of baseline information on each subject.

The dilemma helped motivate locally efficient estimation for coarsened data structures, as surveyed in the books of van der Laan and Robins (2003) and Tsiatis (2006). Here one fits a relatively small working model …

Determination Of The Relationship Between Precipitation And Return Periods To Assess Flood Risks In The City Of Juarez, Mexico, Héctor Quevedo Urías, Humberto Garcia, Jorge Salas Plata Mendoza

2007

This hydrology study applied the Hazen plotting position method to estimate precipitation, return periods and its probability of occurrence, to assess flood risks in Ciudad Juárez, México.

Trigonometry Unit Based On Brain Research, Cynthia Tait

Regis University Student Publications (comprehensive collection)

Trigonometry Unit Based on Brain Research The purpose of this project was to provide the teachers of high school geometry students with a unit on trigonometry that uses strategies that work with the natural brain process to promote successful learning. The trigonometry unit also serves as a sample unit in which brain compatible teaching strategies have been applied. Teachers can increase their effectiveness by transferring the strategies discussed in this project to other mathematics units, other subjects, or other grade levels. The unit was developed based on the findings from the current research on: (a) brain physiology, (b) adolescent learning, …

Sheep Updates 2007 - Part 1, Richard Gunner, Anthony Clarke, Kevin Bell, Hugh Dove, H. M. Burrow, Kevin Goss

Sheep Updates

This session covers six papers from different authors:

PLENARY

1. Life beyond the farmgate - the meat perspective, Richard Gunner – Principal:- Richard Gunner’s Fine Meats

2. Do you need to worry about climate change?, Anthony Clark, Centre for Resource and Environmental Studies, Australian National University and Bureau of Rural Sciences.

3. Ruminant nutrition panel session - The impact of nutrition on animal health and welfare, Kevin Bell, School of Veterinary and Biomedical Studies, Murdoch University

4. Ruminant nutrition panel session - Pasture/animal interactions, Hugh Dove, Chief Research Scientist, CSIRO Plant Industry

5. Precision Cattle Breeding for …

Sheep Updates 2007 - Part 3, Andrew Ritchie, Edward Riggall, James Hall, Gus Rose, Johan Greeff, John Young, M. Alchin, M. Young, T. Johnson, John Lucy, Martin Staines, Tim Wiley, Rob Grima, Sandra Prosser, Matt Ryan, Geoff Moore, Tony Albertsen, Phil Barrett-Lennard, George Woolston, John Titerington, Sarah Knight, Brianna Peake

Sheep Updates

This session covers seven papers from different authors:

PROFITABILITY

1. Benchmarking demonstrates both the potential and realised productivity gains in the sheep and wool industry, Andrew Ritchie, Edward Riggall and James Hall, ICON Agriculture, Darkan

2. Improving sheep genetics will increase farm profitability, Gus Rose, Johan Greeff Department of Agriculture and Food Western Australia, John Young Farming Systems Analysis Service, WA

3. Meat, Merinos and making money in WA Pastoral Zone, M. Alchin, M. Young and T. Johnson, Department of Agriculture and Food Western Australia,

GRAZING

4. Nitrogen - farmers' friend or foe? John Lucy and Martin Staines, Department …

Sheep Updates 2007 - Part 4, Dean Thomas, Dominique Blache, Dean Revell, Hayley Norman, Phil Vercoe, Zoey Durmic, Serina Digby, Di Mayberry, Megan Chadwick, Martin Sillence, David Masters, R. Silberstein, F. Byrne, P. G. H. Nichols, J. Young, L. Aitkins, M. G. Wilmot, A. J. Rintoul, T. Lambert, D. R. Mcclements, P. Raper, P. Ward, C. Walton, T. York, David Pethick, David Hopkins, Malcolm Mcphee, D. B. Savage, J. V. Nolan, I. R. Godwin, A. Aoetpah, T. Nguyen, N. Baillie, C. Lawler, Ken Geenty, John Smith, Darryl Smith, Tim Dyall, Grant Uphill, John Young, Michael Paton, John Dorrian

Sheep Updates

This session covers eight papers from different authors:

GRAZING

1. The impact of high dietary salt and its implications for the management of livestock grazing saline land, Dean Thomas, Dominique Blache, Dean Revell, Hayley Norman, Phil Vercoe, Zoey Durmic, Serina Digby, Di Mayberry, Megan Chadwick, Martin Sillence and David Masters, CRC for Plant-based Management of Dryland Salinity, Faculty of Natural & Agricultural Sciences, The University of Western Australia, WA.

2. Sustainable Grazing on Saline Lands - outcomes from the WA1 research project, H.C. Norman^1,2, D.G. Masters^1,2, R. Silberstein^1,2, F. Byrne^2,3, P.G.H. Nichols …

Gis Analysis Of Lightning Strikes Within A Tornadic Environment, Richard Snow, Mary Snow, Nicole Kufa

Publications

Recent research suggests that a maximum rate of lightning strikes occurs at least 15 to 20 minutes prior to tornado formation within a supercell storm. These maxima are associated with strengthening updrafts as they appear in radar measurements. An increase in lightning rates correlates with an increase of shear in the lower part of the storm. In combination with a strong updraft or downdraft, this shear can provide the ingredients for rotation and possibly a tornado. Polarity reversal of lightning around the time of tornado touchdown also has been examined. Thus, increasing lightning flash rates and reversal of lightning strike …

Vacuum Energy And Repulsive Casimir Forces In Quantum Star Graphs, S. A. Fulling, L. Kaplan, J. H. Wilson

Faculty Publications

Casimir pistons are models in which finite Casimir forces can be calculated without any suspect renormalizations. It has been suggested that such forces are always attractive, but we present several counterexamples, notably a simple type of quantum graph in which the sign of the force depends upon the number of edges. We also show that Casimir forces in quantum graphs can be reliably computed by summing over the classical orbits, and study the rate of convergence of the periodic orbit expansion. In generic situations where no analytic expression is available, the sign and approximate magnitude of Casimir forces can often …

Muscle Activation In Coupled Scapulohumeral Motions In The High Performance Tennis Serve, William B. Kibler, T. Jeff Chandler, Robert Shapiro, Michael Conuel

Research, Publications & Creative Work

Objective: To evaluate muscle activation patterns in selected scapulohumeral muscles in the tennis serve. These patterns of muscle activation have not been evaluated in other studies of the tennis serve. Fine wire and surface EMG was used to calculate onset and offset timing of muscle activation.

Design: Controlled laboratory study.

Setting: Biomechanical laboratory.

Subjects: 16 tennis players (age 18–40) with rated skills (National Tennis Rating Program (NTRP) rating 4.5– 6.5; club tournament level or higher) were subjects.

Main outcomes measure: Dependent variables of muscle activation onset and offset as well as sequencing of the stabilising muscles of the scapula (upper …

A High-Resolution Ultraviolet Absorption Spectrum Of Supernova Ejecta In Sn1006, Andrew J. S. Hamilton, Robert A. Fesen, William P. Blair

Dartmouth Scholarship

We report a high-resolution, far-ultraviolet, Space Telescope Imaging Spectrograph (STIS) E140M spectrum of the strong, broad Siii, iii and iv features produced by the ejecta of the supernova of 1006 ad (SN1006) seen in absorption against the background Schweizer–Middleditch OB subdwarf star. The spectrum confirms the extreme sharpness of the red edge of the redshifted Si ii 1260 Å feature, supporting the idea that this edge represents the location of the reverse shock moving into the freely expanding Si-rich ejecta. The expansion velocity of ejecta at the reverse shock is measured to be 7026 ± 3(relative) ±10(absolute) km s^{−1 …}

The Design And Use Of Simulation Computer Games In Education, Brett E. Shelton, David A. Wiley

Instructional Technology and Learning Sciences Faculty Publications

This book, edited by Brett Shelton and David Wiley, is a view of models and simulations for education and research.

Table of Contents

1. In Praise of Epistemology - David Shaffer

2. Six Ideas in Search of a Discipline - Richard Van Eck

3. Building Bridges Between Serious Game Design and Instructional Design - Jamie Kirkley, Sonny Kirkley and Jerry Heneghan

4. Layered Design in an Instructional Simulation - Andrew S. Gibbons and Stefan Sommer

5. Designing Educational Games for Activity-Goal Alignment - Brett E. Shelton

6. "The Peripatos Could Not have Looked Like That," and Other Educational Outcomes From …

Variable Selection For Nonparametric Varying-Coefficient Models For Analysis Of Repeated Measurements, Lifeng Wang, Hongzhe Li

UPenn Biostatistics Working Papers

Nonparametric varying-coefficient models are commonly used for analysis of data measured repeatedly over time, including longitudinal and functional responses data. While many procedures have been developed for estimating the varying-coefficients, the problem of variable selection for such models has not been addressed. In this article, we present a regularized estimation procedure for variable selection for such nonparametric varying-coefficient models using basis function approximations and a group smoothly clipped absolute deviation penalty (gSCAD). This gSCAD procedure simultaneously selects significant variables with time-varying effects and estimates unknown smooth functions using basis function approximations. With appropriate selection of the tuning parameters, we have …

Greedy Signal Recovery And Uncertainty Principles, Deanna Needell, Roman Vershynin

CMC Faculty Publications and Research

This paper seeks to bridge the two major algorithmic approaches to sparse signal recovery from an incomplete set of linear measurements – L1-minimization methods and iterative methods (Matching Pursuits). We find a simple regularized version of the Orthogonal Matching Pursuit (ROMP) which has advantages of both approaches: the speed and transparency of OMP and the strong uniform guarantees of the L1-minimization. Our algorithm ROMP reconstructs a sparse signal in a number of iterations linear in the sparsity, and the reconstruction is exact provided the linear measurements satisfy the Uniform Uncertainty Principle. In the case of inaccurate measurements and approximately sparse …

Jeanne Gurnee Oral History Interview With Beth Fratesi And Todd Chavez, July 23, 2007, Jeanne Gurnee (Interviewee), Sarah Elizabeth (Beth) Fratesi (Interviewer), Todd Chavez (Interviewer)

Environmental Sustainability Oral Histories

Jeanne Gurnee, speleologist, explorer, writer, editor, conservationist, and land-use planner, discusses how she developed her lifelong interest in caving, how she met her husband Russell, and how they began their involvement with the National Speleological Society (NSS) as a professional pair. She gives an in-depth, chronological discussion of her professional involvement with caving groups and organizations, specifically the founding of fifty or more grottos, as well as her cave projects in Puerto Rico, Barbados, and Angola. Jeanne Gurnee speaks of her love of "show caves", their importance, her reception as an ecological lecturer, and her advice to young women beginning …

William Halliday Oral History Interview With Spencer Fleury And Todd Chavez, July 23, 2007, William Halliday (Interviewee), Spencer Fleury (Interviewer), Todd Chavez (Interviewer)

Environmental Sustainability Oral Histories

Dr. William Halliday, medical surgeon and karst terrain authority, relates segments of his life story back to the development of his interest in karst and caving. Dr. Halliday recounts his involvement as a charter member of the National Speleological Society (NSS), founding several grottos, and the political activism in which he participated on their behalf. He describes a few of his international caving adventures, the difference between karst and pseudo-karst, and his impressions on whether there exists an attitudinal divide between geologists and amateur sport cavers. The interview ends with Dr. Halliday's personal belief that Mars exploration should be pivotal …

Secure Cryptographic Precomputation With Insecure Memory, Patrick P. Tsang, Sean W. Smith

Computer Science Technical Reports

Precomputation dramatically reduces the execution latency of many cryptographic algorithms. To sustain the reduced latency over time during which these algorithms are routinely invoked, however, a pool of precomputation results must be stored and be readily available. While precomputation is an old and well-known technique, how to securely and yet efficiently store these precomputation results has largely been ignored. For instance, requiring tamper-proof memory would be too expensive, if not unrealistic, for precomputation to be cost-effective. In this paper, we propose an architecture that provides secure storage for cryptographic precomputation using only insecure memory, which may be eavesdropped or even …