Physical Sciences and Mathematics Commons^™

Modeled And Observed Empirical Orthogonal Functions Of Currents In The Yucatan Channel, Gulf Of Mexico, Lie-Yauw Oey, Tal Ezer, Wilton Sturges

CCPO Publications

Candela et al. [2003] have reported empirical orthogonal function (EOF) analyses based on 23-month current-meter and acoustic Doppler current profiler measurements in the Yucatan Channel. Those authors noted the difference between EOFs obtained from observations and their z-level models and EOFs calculated by Ezer et al. [2003] from the results of a terrain-following model. Here a new analysis is reported that explains this difference, and that also suggests the importance of shelf-edge meander mode of the core Loop Current in the channel. We show that the terrain-following model gives EOFs with characteristics similar to those observed when data from the …

Foreland Basins: Lithospheric Flexure, Plate Strength And Regional Stratigraphy, John Londono

LSU Doctoral Dissertations

Foreland basin subsidence through time is reproduced in this study, as the flexure of an elastic beam in an inviscid fluid under the vertical stress, caused by discrete-distributed loads. Thus, seismostratigraphic data from the Timor Sea peripheral foreland basin, in northwestern Australia, and the Putumayo retroarc foreland basin in the Colombian Andes, are forward modeled, at chronostratigraphic intervals, to assess the evolving geodynamic conditions of the basins. Results show that the accommodation in foreland basins varies as the depositional basement is vertically adjusted according to the regionally isostatic compensation of the lithosphere. Distributed tectonic (thrust belts) and sedimentary loads that …

Selected Hydrologic Data For Sand Cove Wash, Washington County, Utah, Aaron Norton, David D. Susong

All U.S. Government Documents (Utah Regional Depository)

Southwestern Utah is one of the most arid and fastest growing regions of Utah. Development of new and existing water resources will be required to meet the water needs of the region. Sand Cove Wash, a tributary of the Santa Clara River that flows into Gunlock Reservoir, was investigated as a potential site for diverting peak runoff from the Santa Clara River in order to delay its arrival at the reservoir or to artificially recharge alluvial sediment or the underlying Navajo aquifer. Hydrologic data collected in this study are described and listed in this report. Six boreholes were drilled in …

Development And Performance Evaluation Of A Real-Time Web Search Engine, Burr S. Watters Iv

UNF Graduate Theses and Dissertations

As the World Wide Web continues to grow, the tools to retrieve the information must develop in terms of locating web pages, categorizing content, and retrieving quality pages. Web search engines have enhanced the online experience by making pages easier to find. Search engines have made a science of cataloging page content, but the data can age, becoming outdated and irrelevant.

By searching pages in real time in a localized area of the web, information that is retrieved is guaranteed to be available at the time of the search. The real-time search engines intriguing premise provides an overwhelming challenge. Since …

Cross-Modal Interface Design In Crisis Control Systems: The Role Of Gender, Pamela B. Sheppard

UNF Graduate Theses and Dissertations

Leading human-computer interaction (HCI) researchers recognize a fundamental difference exists between men and women. Some HCI research has been done regarding gender differences in hand-eye coordination for interactions with computer touch display interfaces, navigation through virtual environments (VE) and language in computer-mediated communication. In these previous studies, gender differences were found in the use of words and language in computer-mediated communication and in navigation strategies for VE but no gender-related differences were found for the hand-eye coordination needed to effectively use a touch display.

The current study used a cross-modal (auditory-visual), dual-task, computer interface to examine gender differences in crisis …

The Radon-Gauss Transform, Vochita Mihai

LSU Doctoral Dissertations

Gaussian measure is constructed for any given hyperplane in an infinite dimensional Hilbert space, and this is used to define a generalization of the Radon transform to the infinite dimensional setting, using Gauss measure instead of Lebesgue measure. An inversion formula is obtained and a support theorem proved.

Quasioptimality Of Some Spectral Mixed Methods, Jay Gopalakrishnan, Leszek Demkowicz

Mathematics and Statistics Faculty Publications and Presentations

In this paper, we construct a sequence of projectors into certain polynomial spaces satisfying a commuting diagram property with norm bounds independent of the polynomial degree. Using the projectors, we obtain quasioptimality of some spectralmixed methods, including the Raviart–Thomas method and mixed formulations of Maxwell equations. We also prove some discrete Friedrichs type inequalities involving curl.

Structural Studies Of The Role Of Iron Oxide In Environmental Catalysis, Aisha Ali Saif Rashid Al-Nayeli

Theses

This thesis presents several fundamental studies of structure-reactivity relationships between pure iron oxides, supported and composite oxides specifically in relation to the decomposition of carbon tetrachloride, CCI₄. A series of iron oxides were synthesized and characterized using infrared (FT-IR) spectroscopy to establish their composition spectroscopically, using BET surface area measurements to determine their surface areas and X-ray diffraction powder (XRD) experiments to measure their structural parameters.

A new method was then developed to decompose CCl₄ at a lower temperature than previously found, choosing the optimum catalyst. The effects of varying the temperature on the CCl₄ decomposition …

On The Empirical Balanced Truncation For Nonlinear Systems, Marissa Condon, Rossen Ivanov

Articles

Novel constructions of empirical controllability and observability gramians for nonlinear systems for subsequent use in a balanced truncation style of model reduction are proposed. The new gramians are based on a generalisation of the fundamental solution for a Linear Time-Varying system. Relationships between the given gramians for nonlinear systems and the standard gramians for both Linear Time-Invariant and Linear Time-Varying systems are established as well as relationships to prior constructions proposed for empirical gramians. Application of the new gramians is illustrated through a sample test-system.

Riemann Tensor Of The Ambient Universe, The Dilaton, And Newton’S Constant, Rossen Ivanov, Emil Prodanov

Articles

We investigate a four-dimensional world, embedded into a five-dimensional spacetime, and find the five-dimensional Riemann tensor via generalisation of the Gauss (--Codacci) equations. We then derive the generalised equations of the four-dimensional world and also show that the square of the dilaton field is equal to the Newton's constant. We find plausable constant and non-constant solutions for the dilaton. Comment: 5 pages, revtex

Magnetite: Raman Study Of The High-Pressure And Low-Temperature Effects, Daniel Arenas

All Volumes (2001-2008)

We report the results of a low-temperature (300K-15K) high-pressure (up to 22GPa) Raman study of the Verwey transition in magnetite (Fe3O4). We use additional Raman modes observed below the Verwey transition to determine how the transition temperature changes with the quasihydrostatic pressure. Increase of the pressure results in the linear decrease of the Verwey transition temperature, with no discontinuity. The corresponding pressure coefficient dTV/dP is found to be -5.16±1.19 K/GPa. Such a decrease is substantially larger than the one predicted by the mean-field Coulomb interaction model of the transition.

Is Mwp 1a Real And Could It Have Originated In The Northern Hemisphere In Response To Bolling Warming, Sean D. Birkel

Electronic Theses and Dissertations

Meltwater Pulse 1A (MWP 1A) is thought to have encompassed an abrupt rise in sea-level of 19 - 24 m ca. 14,000 calendar years B.P. The postulated rate of sea-level rise during the event was 24 - 50 mrnJyr. In contrast, the average rate of change during the overall glacial termination was 13 mrn/yr. Although MWP 1A is commonly accepted at face value, a compilation of all basic data points casts doubts on its validity. The Laurentide Ice Sheet (LIS) is commonly cited as the source of MWP 1A. Accelerated discharge of freshwater from the ice sheet could have weakened …

A 200-Year Sulfate Record From 16 Antarctic Ice Cores And Associations With Southern Ocean Sea Ice Extent, Daniel A. Dixon

Electronic Theses and Dissertations

Data from sixteen, 50m- to 115m-deep, sub-annually dated ice cores are used to examine the recent spatial and temporal concentration variability of sea salt (ss)S04 " and excess (xs)S04 " over West Antarctica for the last 200 years. The preservation of seasonal layers throughout the length of each record results in a dating accuracy of better than one year based on known global scale volcanic events. A dual transport source for West 9 9 Antarctic SSSO4 " and XSSO4 " is observed: lower tropospheric for areas below 1000m elevation and mid-upper tropospheric/stratospheric for areas located above 1000m. The XSSO4 " …

Aesthetic Values Of Five Primary Wood Transporting Methods Common To Northern New England, Michael C. Eckley

Electronic Theses and Dissertations

Throughout northern New England and across the country, increasing populations and the exurbanization of rural forested landscapes have had a tremendous impact on forest management. As forested areas become more populated, society has become more exposed to the sights and sounds associated with different forest operations. As a result, aesthetics are increasingly driving public reaction to and concern about forestry practices, especially timber harvesting. How people perceive forestry harvesting can be significant in defining the future of forest management, particularly in more populated woodlands. The objective of this study was to better understanding public values as they relate to timber …

Evaporation Basin Guidelines For Disposal Of Saline Water, Jda Consultant Hydrologists, Edward Hauck

Agriculture reports

The purpose of this guideline is to provide information and criteria for evaporation basin planning, design, construction, monitoring, and maintenance for purposes of disposal of water and storage of disposed salts in dryland agricultural areas of Western Australia. The application of the guidelines will assist in the management of saline discharge and the protection of natural resources. The guidelines have been tailored specifically for saline evaporation disposal sites located in the wheatbelt areas of Western Australia.

Spectacular Recovery In The Ord River Catchment, A L. Payne, I W. Watson, P E. Novelly

Agriculture reports

Regeneration work on severely damaged country in what is now known as the Ord River Regeneration Reserve (ORRR) commenced in 1960. The ORRR is in the East Kimberley area of Western Australia with an associated small area in the Northern Territory. The work included strip contour cultivation and seeding (which proceeded at various levels of intensity during the 1960s, 1970s and 1980s), fencing and destocking of cattle by mustering over many years, and the eradication of donkeys.

Pastoral Resources And Their Management In The Pilbara Region Of Western Australia, A M E Van Vreeswyk, Alan Payne, K A. Leighton

Agriculture reports

This report is a product of the rangeland survey of the Pilbara area of Western Australia which was conducted jointly by the Department of Agriculture and the Department of Land Administration ... in 1995-1999. This report is primarily intended to be used to assist pastoralists in station management and to assist others involved with the pastoral industry. The survey area includes all of the De Grey, East Pilbara and Roebourne/Port Hedland Land Conservation Districts, part of the Ashburton Land Conservation District.

Statistical Mechanics Of Farey Fraction Spin Chain Models, Jan Fiala

Electronic Theses and Dissertations

This thesis considers several statistical models defined on the Farey fractions. Two of these models, considered first, may be regarded as "spin chains", with long-range interactions, another arises in the study of multifractals associated with chaotic maps exhibiting intermittency. We prove that these models all have the same free energy. Their thermodynamic behavior is determined by the spectrum of the transfer operator (Ruelle-Perron-F'robenius operator), which is defined using the maps (presentation functions) generating the Farey "tree". The spectrum of this operator was completely determined by Prellberg. It follows that all these models have a second-order phase transition with a specific …

Progress At The Heidelberg Ebit, Jose R. Crespo Lopez-Urrutia, Jean Pierre Braun, Gunter Brenner, Hjalmar Bruhns, Christina Dimopoulou, I. N. Draganic, Daniel Fischer, Antonio J. Gonzalez, A. Lapierre, V. Mironov, Robert Moshammer, R. Soria Orts, Hiroyuki Tawara, M. Trinczek, Joachim Hermann Ullrich

Physics Faculty Research & Creative Works

Two years after the relocation of the Heidelberg EBIT, several experiments are already in operation. Spectroscopic measurements in the optical region have delivered the most precise reported wavelengths for highly charged ions, in the case of the forbidden transitions of Ar XIV and Ar XV. The lifetimes of the metastable levels involved in those transitions has been determined with an error of less than 0.2%. A new, fully automatized x-ray crystal spectrometer allows systematic measurements with very high precision and reproducibility. Absolute measurements of the Lyman series of H-like ions are currently underway. Dielectronic recombination studies have yielded information on …

Ninebanded Armadillo (Dasypus Novemcinctus), Michael T. Mengak

United States Department of Agriculture Wildlife Services: Staff Publications

Scientists classify armadillos with anteaters and sloths. This tells us that they have poorly developed teeth and limited mobility. In fact, armadillos have small, peg-like teeth that are useful for grinding their food but of little value for capturing prey. No other mammal in Georgia has bony skin plates or a “shell”, which makes the armadillo easy to identify. Just like a turtle, the shell is called a carapace. Armadillos are common in central and southern Georgia and are moving northward. Only one species of armadillo lives in Georgia and the southeastern U.S. However, 20 recognized species are found throughout …

Book Review Of Chromatography Of Natural, Treated And Waste Waters Edited By T. R. Crompton, John J. Johnston

United States Department of Agriculture Wildlife Services: Staff Publications

T. R. Crompton has accomplished a significant task, summarizing the literature (up to 1998) for the determination of organic and inorganic compounds in a variety of water substrates (surface/natural water, treated water, and waste water). Overall, the book is relatively easy to read; the manuscript produced by the author contains clear tables, figures, and font. The first chapter presents a brief overview of the techniques presented in the book. The author assumes that the reader has a general understanding of chromatography and the basic components of a chromatographic system. The remainder of the book is organized into chapters by chromatographic …

Prevalence Of Neurotoxic Clostridium Botulinum Type C In The Gastrointestinal Tracts Of Tilapia (Oreochromis Mossambicus) In The Salton Sea, P. P. Nol, T. E. Rocke, K. Gross, T. M. Yuill

United States Department of Agriculture Wildlife Services: Staff Publications

Tilapia (Oreochromis mossambicus) have been implicated as the source of type C toxin in avian botulism outbreaks in pelicans (Pelecanus erythrorhynchos, Pelecanus occidentalis californicus) at the Salton Sea in southern California (USA). We collected sick, dead, and healthy fish from various sites throughout the Sea during the summers of 1999 through 2001 and tested them for the presence of Clostridium botulinum type C cells by polymerase chain reaction targeting the C1 neurotoxin gene. Four of 96 (4%), 57 of 664 (9%), and five of 355 (1%) tilapia tested were positive for C. botulinum type C …

Safety Of Brucella Abortus Strain Rb51 In Black Bears, Steven C. Olsen, Jack Rhyan, T. Gidlewski, Jesse Goff, W. C. Stoffregen

United States Department of Agriculture Wildlife Services: Staff Publications

In two studies conducted from October 1999 to March 2000 and December 2000 to April 2001, adult black bears (Ursus americanus) were orally inoculated with 1.4–3.1X10¹⁰ colony-forming units (CFU) of Brucella abortus strain RB51 (SRB51, n=12) or 2 ml of 0.15 M NaCl solution (saline, n=11). We did not detect a difference (P>0.05) in antibody titers to SRB51 in serum obtained before vaccination, at 8 wk after vaccination, or at necropsy at 21 or 23 wk after vaccination between SRB51-vaccinated and nonvaccinated bears. The SRB51 vaccine strain was recovered from tissues obtained at …

Bird Depredation, James F. Glahn, D. Tommy King

United States Department of Agriculture Wildlife Services: Staff Publications

A survey of catfish producers by the United States Department of Agriculture, Centers for Epidemiology and Animal Health (CEAH) in 1996 indicated that the two primary sources of catfish losses in commercial operations were disease (45%) and wildlife (37%) (CEAH 1997a). A variety of avian and mammalian predators are amracred to aquaculture facilities in the United States (Parkhurs: er al. 1992) because ponds and open raceways provide a constant and readily accessible food supply for these animals. However, the mere presence of these predators arcund aquaculture faciliries does not necessarily mean that significant depredation problems are occurring. At catfish farms, …

Coyote And Wolf Habitat Use In Northwestern Montana, Wendy M. Arjo, Daniel H. Peltscher

United States Department of Agriculture Wildlife Services: Staff Publications

Being a habitat generalist is an adaptation suategy that has allowed the coyote to expand its range. As wolves reestablish, or are reintroduced, resident populations of coyotes may change habitat use. We compared habitat use between coyotes and wolves in Glacier National Park after successful recolonization by wolves. Two wolf oacks and nine coyotes were monitored from June 1994 throueh June 1997 to determine habitat use in northwestern Montana. Wolves used habitat types within their home ranges in proportion to availability during the winter, but not the summer when more open areas and burned forests were used. Most coyotes used …

Managing Wolf Depredation In The United States: Past, Present, And Future, Stewart W. Breck, Tom Meier

United States Department of Agriculture Wildlife Services: Staff Publications

With the successful recolonization and reintroduction of wolves (Canis lupus) in parts of the western United States (Bangs and Fritts, 1996; Bangs et al., 1998) and the natural expansion of wolves in the upper Midwest (Fuller et al., 1992; Thiel, 2001), managing conflicts between wolves and livestock is a growing issue for livestock producers, resource professionals, and the general public (Mech, 1996). Unlike the coyote, (Canis latrans) where a great deal is known regarding the biology and ecology of depredation and methods for managing it (Knowlton et al., 1999), very little is known regarding patterns and processes of wolves preying …

Usda Wildlife Services Image Collection: Creating An Online Database Of Digital Images Using Contentdmtmso Rware, Diana L. Dwyer

United States Department of Agriculture Wildlife Services: Staff Publications

Photographic images are valuable assets in wildlife damage management research. Photographs are used in ~resentation.s ~.. u bublicationsw, ehsites. and wsters to illustrate dama-ge mblems. the mcies involved and management solutions. & - 'However, organizing phot&aphic &llecions is time consuming, requires special storage, and locating individual images becomes difficult as collections grow. This article demonstrates the USDA Wildlife Senices Image Collection Database and describes the steps taken in creatingthe database, scanning the images, developing a conwolled vocabulary and metadata, and Internet search screens. The database allows users to search by keyword, +lay search results, and download selected images hectly into …

Monetary Valuation Of Rare Species And Imperiled Habitats As A Basis For Economically Evaluating Conservation Approaches , Richard M. Engeman, Stephanie A. Shwiff, Henry T. Smith, Bernice Constantin

United States Department of Agriculture Wildlife Services: Staff Publications

Management actions directed towards the conservation of species or habitats are usually measured in resource improvement. Nevertheless, the decision to select and carry out such actions are rooted in the available funding. Therefore, to truly evaluate the benefit/costs of a conservation-directed management action, the resource improvement should be in the same metric as the expenditures. To this end, we describe here a variety of methods for attaching monetary values to rare species and habitats. We also give examples of applications with which we have been involved to demonstrate how such species and habitat valuations have allowed economic analyses of conservation …

Solutions Through Science: Protecting Sunflowers From Blackbirds

United States Department of Agriculture Wildlife Services: Staff Publications

In late summer, large flocks of blackbirds gather in the northern Great Plains to prepare for their strenuous migration to southern wintering grounds in the United States and Mexico. The birds acquire energy for their trip by feasting on energy-rich seeds and berries. Unfortunately for farmers, many of those seeds come from agricultural crops. Red-winged blackbirds, common grackles, and yellow-headed blackbirds cause most of the damage to commercial crops. Sunflower producers in North Dakota, South Dakota, and Minnesota suffer millions of dollars’ worth of losses annually due to blackbirds.

Reducing blackbird damage to sunflower crops continues to be a challenge …

The Effects Of The Cognitive Tutor Algebra On Student Attitudes And Achievement In A 9th Grade Algebra Course, Gary S. Plano

Seton Hall University Dissertations and Theses (ETDs)

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