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2009

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Articles 6541 - 6570 of 7616

Full-Text Articles in Physical Sciences and Mathematics

Problems Of Equity And Efficiency In The Design Of International Greenhouse Gas Cap-And-Trade Schemes, Jason S. Johnston Jan 2009

Problems Of Equity And Efficiency In The Design Of International Greenhouse Gas Cap-And-Trade Schemes, Jason S. Johnston

All Faculty Scholarship

This article argues that international greenhouse gas (GHG) cap-and-trade schemes suffer from inherent problems of enforceability and verifiability that both cause significant inefficiencies and create inevitable tradeoffs between equity and efficiency. A standard result in the economic analysis of international GHG cap and trade schemes is that an allocation of initial permits that favors poor, developing countries (making such countries net sellers in equilibrium) may be necessary not only to further redistributive goals but also the efficiency of the GHG cap and trade scheme. This coincidence of equity and efficiency is, however, unlikely to be realized under more realistic assumptions …

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Utk Geography Newsletter 9 (2008-2009), Department Of Geography Jan 2009

Utk Geography Newsletter 9 (2008-2009), Department Of Geography

UTK Geography Newsletter

No abstract provided.

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Multiple Linear Regression Model Of Visceral Leishmaniasis In Bihar, India, Darren Sheets Jan 2009

Multiple Linear Regression Model Of Visceral Leishmaniasis In Bihar, India, Darren Sheets

Mathematics Theses

Visceral Leishmaniasis (VL) is one of the world's worst parasitic killers, second only to Malaria, claiming nearly 500,000 lives each year. The disease attacks the spleen, liver, and bone marrow, and if left untreated is nearly always fatal. Whilst the disease is found all around the world, it is primarily prevalent in developing countries, in particular India. The most affected state in India is Bihar, where the disease is endemic. While other research has been conducted with emphasis on the effect of climate variables on the disease incidence rate, this analysis focuses on socio-economic variables such as literacy rate, housing …

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Geochemistry Of Molybdenum In The Aquia Aquifer, Maryland, Usa, Teresa Iafelice Valle Jan 2009

Geochemistry Of Molybdenum In The Aquia Aquifer, Maryland, Usa, Teresa Iafelice Valle

Earth & Environmental Sciences Theses

The present study contributes to the understanding of controls on and behavior of molybdenum (Mo) in an aquifer, and its potential as an indicator of changing redox conditions along the groundwater flowpath. The central hypothesis of the present work is that the hydrogeochemical evolution along two separate groundwater flowpaths of the Aquia Aquifer, Maryland, USA, one each on the Eastern and Western Shore of Chesapeake Bay, consists of chemical weathering and oxidation-reduction reactions that dictate the degree of Mo mobilization, as well as mineral co-precipitation/re-adsorption reactions that dictate the degree of Mo immobilization (i.e., scavenging). This hypothesis is evaluated by …

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Complementary Responses To Mean And Variance Modulations In The Perfect Integrate-And-Fire Model, Joanna R. Wares, Todd W. Troyer Jan 2009

Complementary Responses To Mean And Variance Modulations In The Perfect Integrate-And-Fire Model, Joanna R. Wares, Todd W. Troyer

Department of Math & Statistics Faculty Publications

In the perfect integrate-and-fire model (PIF), the membrane voltage is proportional to the integral of the input current since the time of the previous spike. It has been shown that the firing rate within a noise free ensemble of PIF neurons responds instantaneously to dynamic changes in the input current, whereas in the presence of white noise, model neurons preferentially pass low frequency modulations of the mean current. Here, we prove that when the input variance is perturbed while holding the mean current constant, the PIF responds preferentially to high frequency modulations. Moreover, the linear filters for mean and variance …

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Scorpionate Supported And Unsupported Carbonyl And Ethylene Complexes Of Group 11 Metals, Mauro Fianchini Jan 2009

Scorpionate Supported And Unsupported Carbonyl And Ethylene Complexes Of Group 11 Metals, Mauro Fianchini

Chemistry & Biochemistry Dissertations

Carbon monoxide (CO) and small olefins represent perhaps the simplest, but most important ligand systems in coordination/organometallic chemistry. Simple carbonyl and ethylene compounds have started to appear in the field since the early nineteen century. Due to their peculiar electronic properties, strong bonds to late transition metal cations such as Cu¹, Ag¹, and Au¹ are generally discouraged. However, intermediates involving M-CO or M-olefin (where M = Cu¹, Ag¹, Au¹) have been claimed to be key-steps in reactions and industrial processes involving coinage metals. Unfortunately, experimental data on coinage metal complexes with CO and olefins are scarce due to the difficulty …

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Removal Of Butylene And Propylene Gas Using Biofiltration, Madhu Rani Jan 2009

Removal Of Butylene And Propylene Gas Using Biofiltration, Madhu Rani

Earth & Environmental Sciences Theses

Air pollutants are produced from a variety of anthropogenic activities such as food production, wastewater treatment plants, painting, industrial activities, and biomass combustion. Such pollutants are becoming a cause of concern worldwide because of their harmful effects on ecosystems, human health, and the atmosphere. One technology for treatment of these hazardous, odorous, and ozone-forming compounds is biofiltration. Biofilters are relatively inexpensive to install and operate, and can achieve high pollution removal efficiencies. This research was carried out to determine the removal efficiency of pollutants propylene and butylene using biofilter technology. In a biofilter column, air is passed through a packed …

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Biology In Mathematics At The University Of Richmond, Lester Caudill Jan 2009

Biology In Mathematics At The University Of Richmond, Lester Caudill

Department of Math & Statistics Faculty Publications

In an effort to meet the needs of science students for modeling skills, three new courses have been created at the University of Richmond: Scientific Calculus I and II, and Mathematical Models in Biology and Medicine. The courses are described, and lessons learned and future directions are discussed.

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A Nonlinear Extremal Problem On The Hardy Space, William T. Ross, Stephan Ramon Garcia Jan 2009

A Nonlinear Extremal Problem On The Hardy Space, William T. Ross, Stephan Ramon Garcia

Department of Math & Statistics Faculty Publications

We relate some classical extremal problems on the Hardy space to norms of truncated Toeplitz operators and complex symmetric operators

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Moment Calculations For Low Energy Ions In Jupiter's Magnetotail From Nasa's New Horizons Mission, Debrup Hui Jan 2009

Moment Calculations For Low Energy Ions In Jupiter's Magnetotail From Nasa's New Horizons Mission, Debrup Hui

Physics Theses

Jupiter's magnetosphere and magnetotail is the largest cohesive structure in our solar system which extends to the orbit of Saturn. One of NASA's objectives is to understand how universal bodies interact with its surroundings. The New Horizons (NH) mission is the first satellite to traverse axially through the Jovian magnetotail and obtain in-situ data. The Solar Wind Around Pluto (SWAP) instrument onboard NH measured low energy ions from 35eV to 7.5 keV in the Jovian magnetotail during its fly-by. We analyzed SWAP data from 500-1750 Jovian radii (RJ) when the spacecraft was spinning. A 3D phase-space density fitting procedure was …

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A Study Of Ejection Times Of Terrestrial Planets From The Habitable Zones Of The Solar Twins Hd 20782 And Hd 188015, Katherine Elizabeth Yeager Jan 2009

A Study Of Ejection Times Of Terrestrial Planets From The Habitable Zones Of The Solar Twins Hd 20782 And Hd 188015, Katherine Elizabeth Yeager

Physics Theses

We provide a detailed statistical study of the ejection of Earth-mass planets from the habitable zones of the solar twins HD 20782 and HD 188015. These systems possess a giant planet that crosses into the stellar habitable zone, thus effectively thwarting the possibility of habitable Earth-mass planets. In the case of HD 188015, the orbit of the giant planet is essentially circular, whereas in the case of HD 20782, it is extremely elliptical. As starting positions for the giant planets, we consider both the apogee and perigee position, whereas the starting positions of the Earth-mass planets are widely varied. For …

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Analysis Of Calorimeter/Itc Cosmic Ray Data From The Atlas Detector, And Preparation For Supersymmetry Searches, Carlos Francisco Medina Hernandez Jan 2009

Analysis Of Calorimeter/Itc Cosmic Ray Data From The Atlas Detector, And Preparation For Supersymmetry Searches, Carlos Francisco Medina Hernandez

Physics Theses

The Large Hadron Collider is the largest most ambitious experiment in high energy physics history. It involves the greatest number of scientists from around the world. The first collisions will start being produced in late 2009 and we expect that the information collected will help us understand the physics behind the standard model such as higgs physics and the supersymmetric theories. The Department of Physics at University of Texas at Arlington, and more specifically the high energy physics group is actively involved with the design, construction and commissioning process of the ATLAS Tile Calorimeter. The group is also participating in …

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Creep Behavior Of Natural Fiber Reinforced Polymer Composites, Yanjun Xu Jan 2009

Creep Behavior Of Natural Fiber Reinforced Polymer Composites, Yanjun Xu

LSU Doctoral Dissertations

Creep behavior of natural fiber/polymer composites (NFPCs) was studied in response to the increasing application of this material as structural building products. Factors that influence creep behavior of the composites were investigated by analyzing creep curves of several different NFPC systems, which were designed for overall performance of the composites. Among different models, the 4-element Burgers type was mostly used for quantitative characterization of the creep curves to compare the properties of different composites. The parameters from the 4-element Burgers model were easily interpretable due to their physical meanings. Generalized Burgers models provided better fit by introducing extra Kelvin units, …

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Teacher Knowledge And Statistics: What Types Of Knowledge Are Used In The Primary Classroom?, Tim Burgess Jan 2009

Teacher Knowledge And Statistics: What Types Of Knowledge Are Used In The Primary Classroom?, Tim Burgess

The Mathematics Enthusiast

School curricula are increasingly advocating for statistics to be taught through investigations. Although the importance of teacher knowledge is acknowledged, little is known about what types of teacher knowledge are needed for teaching statistics at the primary school level. In this paper, a framework is described that can account for teacher knowledge in relation to statistical thinking. This framework was applied in a study that was conducted in the classrooms of four second-year teachers, and was used to explore the teacher knowledge used in teaching statistics through investigations. As a consequence, descriptions of teacher knowledge are provided and give further …

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Enhancing Statistics Instruction In Elementary Schools: Integrating Technology In Professional Development, Maria Meletiou-Mavrotheris, Efi Paparistodemou, Despina Stylianou Jan 2009

Enhancing Statistics Instruction In Elementary Schools: Integrating Technology In Professional Development, Maria Meletiou-Mavrotheris, Efi Paparistodemou, Despina Stylianou

The Mathematics Enthusiast

The research discussed in this article comes from an ongoing multifaceted program for the teaching and learning of early statistical reasoning in Cyprus. The initial stage of the program was concerned with the design of a line of instructional materials for the development of statistical reasoning. Central to this design was the functional integration with existing core curricular ideas of the recently developed dynamic statistics software Tinkerplots@, which provides young students with the opportunity to model and investigate real world problems of statistics. Next, professional development seminars for the teaching of statistics with the use of Tinkerplots® were designed and …

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Sedimentation On A Mixed Siliciclastic/Carbonate Continental Margin Over Decadal To Millennial Timescales: Gulf Of Papua, Zahid Muhammad Jan 2009

Sedimentation On A Mixed Siliciclastic/Carbonate Continental Margin Over Decadal To Millennial Timescales: Gulf Of Papua, Zahid Muhammad

LSU Doctoral Dissertations

Sediments from the Gulf of Papua were examined to estimate particle flux and sediment mass accumulation rates on multiple timescales. Patterns of sediment mass accumulation and inventory-derived 210Pb fluxes display regional variations, decreasing seaward, and along isobaths seaward from the northeastern shelf edge. The amount of terrigenous sediment load being discharged annually from the shelf and accumulating in Pandora Trough is approximately 7-14×106 tonnes. The existence of possible turbidity-current transport and deposition have been documented in deeper parts of the Gulf of Papua. High excess 210Pb fluxes estimated from seabed inventories at the shelf edge and upper slope are consistent …

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Benchmarking Biodiversity: Land Resource Mapping In The Ord River Catchment., Tricia Handasyde, Peter J. Tille, Noel R. Schoknecht, Karen Carnes Jan 2009

Benchmarking Biodiversity: Land Resource Mapping In The Ord River Catchment., Tricia Handasyde, Peter J. Tille, Noel R. Schoknecht, Karen Carnes

All other publications

This 2009 report describes the mapping of landform, vegetation and soils undertaken in the Ord River Catchment in the East Kimberley of Western Australia in order to provide a basis for biodiversity benchmarking. The project: • brought together and standardised existing Ord River catchment land resource mapping held by the Department of Agriculture and Food (DAFWA) and Department of Environment and Conservation (DEC) in a format compatible with adjoining mapping in the Northern Territory • mapped to land unit level an additional 4400 sq km of the Ord River catchment. • re-digitised 2200 sq km of vegetation mapping previously not …

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Qualitative Thm-Gc-Ms Analysis Of Proteins And Amino Acids In Rock Painting Binders, Melissa Doolin Jan 2009

Qualitative Thm-Gc-Ms Analysis Of Proteins And Amino Acids In Rock Painting Binders, Melissa Doolin

Senior Honors Theses and Projects

A vital step to radiocarbon dating rock paintings involves the characterization of organic material in the paint. Using THM-GC-MS we have created a library of mass spectrometric data on possible organic binders, to compare to authentic paint samples. To reduce interference from contaminants and the mineral background, we are developing a simple purification technique to extract proteins and carbohydrates from these samples. Separating the organics can greatly enhance our results for GC-MS identification and subsequent radiocarbon analysis by accelerator mass spectroscopy.

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A Density Functional Study Of The Relative Stability Of Intermediates In A Mcmurry Coupling Reaction, Andrew Jozef Livingston Jan 2009

A Density Functional Study Of The Relative Stability Of Intermediates In A Mcmurry Coupling Reaction, Andrew Jozef Livingston

Senior Honors Theses and Projects

Reductive cyclization via McMurry coupling is a common way to form pyrrolizidine rings. In this work we investigate the titanium-catalyzed McMurry coupling reaction leading to a pyrrolizidine alkaloid using density functional methods. Specifically, we compare the relative energies of all possible pinacolate intermediates at the UB3LYP/6-31G level of theory. The most stable intermediate is found to be the one resulting from C-O bond insertion in the ester group. The McMurry product is not predicted to form.

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Advances In The Study Of Marine Mammal Predator-Prey Interactions: A Novel Real-Time Visualization Of Independently Collected Echosounder Data Using Geozui4d, Roland J. Arsenault, Ari S. Friedlaender, Elliott L. Hazen, Colin Ware, David N. Wiley Jan 2009

Advances In The Study Of Marine Mammal Predator-Prey Interactions: A Novel Real-Time Visualization Of Independently Collected Echosounder Data Using Geozui4d, Roland J. Arsenault, Ari S. Friedlaender, Elliott L. Hazen, Colin Ware, David N. Wiley

Center for Coastal and Ocean Mapping

No abstract provided.

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The Vertical Structure Of Shallow Water Flow In The Surf Zone And Inner Shelf, Thomas C. Lippmann Jan 2009

The Vertical Structure Of Shallow Water Flow In The Surf Zone And Inner Shelf, Thomas C. Lippmann

Center for Coastal and Ocean Mapping

No abstract provided.

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Effects Of A Large Fishing Closure On Benthic Communitites In The Western Gulf Of Maine: Recovery From The Effects Of Gillnets And Otter Trawls, Raymond E. Grizzle, Larry G. Ward, Larry A. Mayer, Mashkoor A. Malik, Andrew B. Cooper, Holly Abeels, Jennifer K. Greene, Melissa Brodeur, Andrew A. Rosenberg Jan 2009

Effects Of A Large Fishing Closure On Benthic Communitites In The Western Gulf Of Maine: Recovery From The Effects Of Gillnets And Otter Trawls, Raymond E. Grizzle, Larry G. Ward, Larry A. Mayer, Mashkoor A. Malik, Andrew B. Cooper, Holly Abeels, Jennifer K. Greene, Melissa Brodeur, Andrew A. Rosenberg

Center for Coastal and Ocean Mapping

The recovery of benthic communities inside the western Gulf of Maine fishing closure area was evaluated by comparing invertebrate assemblages at sites inside and outside of the closure four to six years after the closure was established. The major restriction imposed by the closure was a year-round prohibition of bottom gillnets and otter trawls. A total of 163 seafloor sites (~half inside and half outside the closure) within a 515-km2 study area were sampled with some combination of Shipek grab, Wildco box corer, or underwater video. Bottom types ranged from mud (silt and clay) to boulders, and the effects of …

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Mid-Ocean Ridge Transform Faults, Margaret S. Boettcher Jan 2009

Mid-Ocean Ridge Transform Faults, Margaret S. Boettcher

Center for Coastal and Ocean Mapping

No abstract provided.

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Investigation Of The Interactions Between Selected Nanoparticles And Human Lung Carcinoma Cells At The Single Cell And Single Particle Level, Isaac Stayton Jan 2009

Investigation Of The Interactions Between Selected Nanoparticles And Human Lung Carcinoma Cells At The Single Cell And Single Particle Level, Isaac Stayton

Doctoral Dissertations

"The recent advances in nanomaterials development and applications have sparked concerns regarding the safety of these materials in living organisms. This body of work investigates specific interactions between chosen nanoparticles and living human lung carcinoma (A549) cells"--Abstract, page iv.

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Electrodeposition Of Inorganic Materials With Tailored Shapes And Chiral Morphologies, Elizabeth A. Kulp Jan 2009

Electrodeposition Of Inorganic Materials With Tailored Shapes And Chiral Morphologies, Elizabeth A. Kulp

Doctoral Dissertations

"This dissertation investigates the electrodeposition of metal oxide films and biomaterial deposits on polycrystalline and single crystal substrates. Paper I describes the mechanisms and the characterization of an electrodeposited polycrystalline insulator, ceria (CeO₂), on Hastelloy substrates produced by the electrochemical oxidation of Ce(III) acetate complexes. In Paper II, epitaxial films of magnetite (Fe₃O₄) and ferrihydrite (Fe₁₀O₁₄(OH)₂) are deposited on gold single crystals. Paper III reports the electrodeposition of epitaxial Fe₃O₄ and zinc ferrite (ZnFe₂O₄) periodic nanostructures known as superlattices by pulsing between two potentials. Papers IV and V describe chiral electrodeposition. In Paper IV, epitaxial, chiral orientations of cupric oxide …

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2009 Astragalus Barrii Barneby (Barr’S Milkvetch) Survey On The Oglala National Grassland For The Nebraska Game And Parks Commission And Nebraska National Forest, Grace M. Kostel Jan 2009

2009 Astragalus Barrii Barneby (Barr’S Milkvetch) Survey On The Oglala National Grassland For The Nebraska Game And Parks Commission And Nebraska National Forest, Grace M. Kostel

Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts

Astragalus barrii Barneby (Barr’s milkvetch) is ranked globally vulnerable (G3) by NatureServe and critically imperiled (S1) by the Nebraska Natural Heritage Program. A. barrii is designated a sensitive species by the USDA Forest Service (USFS) Region 2 (R2). The Oglala National Grassland (ONG), located in northwestern Nebraska in Dawes and Sioux County, is within the USFS R2 jurisdiction. The purpose of this survey was to: (1) search for and document all A. barrii present on designated areas of the ONG and (2) collect data on rare plant species and high quality native plant community occurrences.

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Keeping Up-To-Date With Bayes (Abstract), Kristin Duncan Jan 2009

Keeping Up-To-Date With Bayes (Abstract), Kristin Duncan

Undergraduate Mathematics Day: Programs, Lectures, Promotional Materials

Bayes’ theorem, a rule for updating probabilities as new information is obtained, may be over two centuries old but it has been the driving force behind many of the most significant recent advances in statistics and other sciences.

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2009 Undergraduate Mathematics Day Poster, University Of Dayton. Department Of Mathematics Jan 2009

2009 Undergraduate Mathematics Day Poster, University Of Dayton. Department Of Mathematics

Undergraduate Mathematics Day: Programs, Lectures, Promotional Materials

No abstract provided.

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2009 Program And Abstracts,, University Of Dayton. Department Of Mathematics Jan 2009

2009 Program And Abstracts,, University Of Dayton. Department Of Mathematics

Undergraduate Mathematics Day: Programs, Lectures, Promotional Materials

No abstract provided.

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These Aren't Your Mothers And Fathers Experiments (Abstract), Thomas J. Santner Jan 2009

These Aren't Your Mothers And Fathers Experiments (Abstract), Thomas J. Santner

Kenneth C. Schraut Memorial Lectures

Informal experimentation is as old as humankind. Statisticians became seriously involved in the conduct of experiments during the early 1900s when they devised methods for the design of efficient field trials to improve agricultural yields. During the 1900s statistical methodology was developed for many complicated sampling settings and a wide variety of design objectives.

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