Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

2007

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 91 - 120 of 12475

Full-Text Articles in Entire DC Network

Director Of Unh Research Institute Will Lead New Climate Initiative, Kim Billings Dec 2007

Director Of Unh Research Institute Will Lead New Climate Initiative, Kim Billings

Media Relations

No abstract provided.

Go to article

Adolescent Girls' Perception Of Residential Treatment Centers: A Qualitative Study Of How Treatment Works, Tyler Adam Money Dec 2007

Adolescent Girls' Perception Of Residential Treatment Centers: A Qualitative Study Of How Treatment Works, Tyler Adam Money

Theses and Dissertations

RTCs play an increasingly significant role in the continuum of treatment of emotionally disturbed adolescents. However, outcome research in this area has lagged behind the growth of treatment centers. More specifically, there has been very little investigation of the relative efficacy of the many different aspects of residential treatment, which are referred to as mechanisms of change in other research. The present study attempts to develop a phenomenological understanding of RTC patients' experience of all of the interventions that make up residential treatment. Results suggest that patients view social support, non-therapist staff members, family involvement and family therapy, as most …

Go to article

Pyridinium Bisretinoids: Synthesis And Photoactivated Cytotoxicity, Junping Gao Dec 2007

Pyridinium Bisretinoids: Synthesis And Photoactivated Cytotoxicity, Junping Gao

Theses and Dissertations

This thesis discusses pyridinium bisretinoid compounds (PBRs), which were prepared for two purposes: 1) to use them as standards for detection of novel fluorophores in human RPE cells, which may be involved in age-related macular degeneration (AMD), and 2) to use them in the development of a targeted and triggered drug delivery system for cancer therapy. We prepared a selection of PBRs using a one-pot biomimetic method; synthesis, mechanisms for formation, and characterization of these compounds is described. We also explored the photoreactivity of three novel PBR compounds and found that these PBRs form oxidation products under blue-light irradiation. The …

Go to article

Cal Poly Professor To Discuss How The Physically Impaired Are Undoing Social Stereotypes Jan. 17, Public Affairs Office Dec 2007

Cal Poly Professor To Discuss How The Physically Impaired Are Undoing Social Stereotypes Jan. 17, Public Affairs Office

Press Releases

No abstract provided.

Go to article

Total Synthesis Of (+/-)-Goniomitine Via A Formal Nitrile/Donor-Acceptor Cyclopropane [3 + 2] Cyclization., Christian L Morales, Brian L Pagenkopf Dec 2007

Total Synthesis Of (+/-)-Goniomitine Via A Formal Nitrile/Donor-Acceptor Cyclopropane [3 + 2] Cyclization., Christian L Morales, Brian L Pagenkopf

Chemistry Publications

The total synthesis of (+/-)-goniomitine has been accomplished in 17 linear steps with 5.2% overall yield starting from commercially available delta-valerolactam. A synthetic highlight includes the first application of a formal [3 + 2] cycloaddition between a highly functionalized nitrile and a donor-acceptor cyclopropane to prepare an indole nucleus. The use of a microwave reactor is shown to greatly improve the reaction times for two steps.

Go to article

Interfacial Coherency And Ferroelectricity Of Batio3/Srtio3 Superlattice Films, Y. L. Li, S. Y. Hu, Dmitri Tenne, A. Soukiassian, D. G. Schlom, X. X. Xi, K. J. Choi Dec 2007

Interfacial Coherency And Ferroelectricity Of Batio3/Srtio3 Superlattice Films, Y. L. Li, S. Y. Hu, Dmitri Tenne, A. Soukiassian, D. G. Schlom, X. X. Xi, K. J. Choi

Physics Faculty Publications and Presentations

We studied the phase transitions, domain morphologies, and polarizations in BaTiO3/SrTiO3 superlattices grown on SrTiO3 substrates. Using the phase field approach, we discovered the remarkable influence of film/substrate interfacial coherency on the ferroelectricity of the SrTiO3 layers within a superlattice: it is an orthorhombic ferroelectric for an incoherent interface while it exhibits only induced polarization by the adjacent BaTiO3 layers for a coherent interface. We presented the domain morphologies within individual BaTiO3 and SrTiO3 layers which have different ferroelectric symmetries. The results are compared to ultraviolet Raman spectroscopy and variable temperature x-ray …

Go to article

Commencement Convocation Program, St. Petersburg Campus, December 18, 2007, University Of South Florida St. Petersburg Dec 2007

Commencement Convocation Program, St. Petersburg Campus, December 18, 2007, University Of South Florida St. Petersburg

USF St. Petersburg Graduations and Commencements

Regional Chancellor's Award for Civic Leadership: Roy Harrell

Go to article

Commencement Convocation Program, St. Petersburg Campus, December 18, 2007, University Of South Florida Dec 2007

Commencement Convocation Program, St. Petersburg Campus, December 18, 2007, University Of South Florida

USF Graduation and Convocation Programs

Regional Chancellor's Award for Civic Leadership - Roy Harrell; Outstanding Graduate - Brenda Mettetal

Go to article

Commencement Convocation Program, Lakeland Campus, December 17, 2007, University Of South Florida Dec 2007

Commencement Convocation Program, Lakeland Campus, December 17, 2007, University Of South Florida

USF Graduation and Convocation Programs

Outstanding Senior - Tara Crum; Distinguished Service Award - Commissioner Jack Myers

Go to article

Existence And Nonexistence Results For A Class Of Quasilinear Elliptic Systems, Said El Manouni Dec 2007

Existence And Nonexistence Results For A Class Of Quasilinear Elliptic Systems, Said El Manouni

Mathematics and System Engineering Faculty Publications

Using variational methods, we prove the existence and nonexistence of positive solutions for a class of -Laplacian systems with a parameter.

Go to article

Analysis Of A Chemically-Bonded Phosphate Ceramic As An Alternative Oilfield Cementing System For Arctic Regions, Nilesh Limaye Dec 2007

Analysis Of A Chemically-Bonded Phosphate Ceramic As An Alternative Oilfield Cementing System For Arctic Regions, Nilesh Limaye

Engineering

Novel chemically bonded phosphate ceramic borehole sealant, i.e. Ceramicrete, has many advantages over conventionally used permafrost cement at Alaska North Slope (ANS). However, in normal field practices when Ceramicrete is mixed with water in blenders, it has a chance of being contaminated with leftover Portland cement. In order to identify the effect of Portland cement contamination, recent tests have been conducted at BJ services in Tomball, TX as well as at the University of Alaska Fairbanks with Ceramicrete formulations proposed by the Argonne National Laboratory. The tests conducted at BJ Services with proposed Ceramicrete formulations and Portland cement contamination have …

Go to article

Investigation Of Phase Behavior And Reservoir Fluid Properties In Support Of Enhanced Oil Recovery Of Alaska North Slope (Ans) Viscous Oils, Kaustubh D. Alurkar Dec 2007

Investigation Of Phase Behavior And Reservoir Fluid Properties In Support Of Enhanced Oil Recovery Of Alaska North Slope (Ans) Viscous Oils, Kaustubh D. Alurkar

Engineering

Declining light oil production on Alaska North Slope (ANS) has attracted oil producers to develop viscous oil resources of ANS that range between 20 to 25 billion barrels. These oils are viscous, flow sluggishly in the formations, and are difficult to transport through unconsolidated formations and are hard to produce by conventional methods. Viscous oil recovery entails neatly designed enhanced oil recovery processes and the success of these processes is critically dependent on accurate knowledge of phase behavior and fluid properties of these oils under variety of pressure and temperature conditions. An experimental study was conducted to quantify the phase …

Go to article

Modeling Of Wax Precipitation, Amit Y. Bhangale Dec 2007

Modeling Of Wax Precipitation, Amit Y. Bhangale

Engineering

Due to increasing oil demand, oil companies are moving into deep water and arctic environments for oil production. In these regions, due to lower temperature, wax starts depositing when the temperature in wellbore falls below Wax Appearance Temperature (WAT). This leads to reduced production rates and larger pressure drops. Wax problems in production wells are very costly due to production down time and removal of wax. Therefore, it is necessary to develop the solution to overcome wax deposition. Wax precipitation is one of the most important phenomena in wax deposition, and hence, it needs to be modeled. There are various …

Go to article

From Twisted Supersymmetry To Orbifold Lattices, Simon Catterall Dec 2007

From Twisted Supersymmetry To Orbifold Lattices, Simon Catterall

Physics - All Scholarship

We show how to derive the supersymmetric orbifold lattices of Cohen et al. \cite{Cohen:2003xe,Cohen:2003qw} and Kaplan et al. \cite{Kaplan:2005ta} by direct discretization of an appropriate twisted supersymmetric Yang-Mills theory. We examine in detail the four supercharge two dimensional theory and the theory with sixteen supercharges in four dimensions. The continuum limit of the latter theory is the well known Marcus twist of {\cal N}=4 Yang-Mills. The lattice models are gauge invariant and possess one exact supersymmetry at non-zero lattice spacing.

Go to article

The Role Of Fire In The Carbon Dynamics Of The Boreal Forest, Michael S. Balshi Dec 2007

The Role Of Fire In The Carbon Dynamics Of The Boreal Forest, Michael S. Balshi

Biological Sciences

The boreal forest contains large reserves of carbon, and across this region wildfire is a common occurrence. To improve the understanding of how wildfire influences the carbon dynamics of this region, methods were developed to incorporate the spatial and temporal effects of fire into the Terrestrial Ecosystem Model (TEM). The historical role of fire on carbon dynamics of the boreal region was evaluated within the context of ecosystem responses to changing atmospheric CO₂ and climate. These results show that the role of historical fire on boreal carbon dynamics resulted in a net carbon sink; however, fire plays a major role …

Go to article

Rhinoceros Auklet Developmental Responses To Moderate Food Restriction, Justine Sears Dec 2007

Rhinoceros Auklet Developmental Responses To Moderate Food Restriction, Justine Sears

Biological Sciences

Seabird nestlings are vulnerable to food restriction because their parents may not buffer them from prey shortages. I conducted a captive study to explore how rhinoceros auklet chicks (Cerorhinca monocerata) may cope with food restriction and avoid long-term fitness consequences. I predicted auklet nestlings would be adapted to moderate levels of food-stress, and investigated how morphological allocation, glucocorticoid stress response, and fledging behavior change under conditions of a 50% calorie restriction. I also investigated effects of growth and food restriction on carbon and nitrogen stable isotope ratios ([delta]¹³C and [delta]¹⁵N) in auklet tissues. I found that food-restricted auklets allocated resources …

Go to article

Post-Breeding Habitat Use By Adult Boreal Toads (Bufo Boreas) After Wildfire In Glacier National Park, Usa, C. Gregory Guscio, Blake R. Hossack, Lisa A. Eby, Paul Stephen Corn Dec 2007

Post-Breeding Habitat Use By Adult Boreal Toads (Bufo Boreas) After Wildfire In Glacier National Park, Usa, C. Gregory Guscio, Blake R. Hossack, Lisa A. Eby, Paul Stephen Corn

United States Geological Survey: Staff Publications

Effects of wildfire on amphibians are complex, and some species may benefit from the severe disturbance of stand-replacing fire. Boreal Toads (Bufo boreas boreas) in Glacier National Park, Montana, USA increased in occurrence after fires in 2001 and 2003. We used radio telemetry to track adult B. boreas in a mosaic of terrestrial habitats with different burn severities to better understand factors related to the post-fire pulse in breeding activity. Toads used severely burned habitats more than expected and partially burned habitats less than expected. No toads were relocated in unburned habitat, but little of the study area …

Go to article

Wildfire Effects On Water Temperature And Selection Of Breeding Sites By The Boreal Toad (Bufo Boreas) In Seasonal Wetlands, Blake R. Hossack, Paul Stephen Corn Dec 2007

Wildfire Effects On Water Temperature And Selection Of Breeding Sites By The Boreal Toad (Bufo Boreas) In Seasonal Wetlands, Blake R. Hossack, Paul Stephen Corn

United States Geological Survey: Staff Publications

Disturbances can significantly affect the thermal regime and community structure of wetlands. We investigated the effect of a wildfire on water temperature of seasonal, montane wetlands after documenting the colonization of recently burned wetlands by the Boreal Toad (Bufo boreas boreas). We compared the daily mean temperature, daily maximum temperature, and accumulated growing degree·days measured on the north shore of three classes of wetlands: unburned wetlands, burned wetlands that were colonized by breeding toads, and burned wetlands that were not colonized. We hypothesized that toads colonized burned wetlands because they were warmer than unburned wetlands and selected specific …

Go to article

The Distribution And Phylogeography Of The Alaska Marmot (Marmota Broweri), Aren M. Gunderson Dec 2007

The Distribution And Phylogeography Of The Alaska Marmot (Marmota Broweri), Aren M. Gunderson

Biological Sciences

The taxonomic and distributional status of the Marmota broweri has been the subject of much debate and confusion since it was first described as a subspecies of the hoary marmot (M caligata). Through a review of all museum specimens, published accounts of this species, field surveys, and the identification of previously unidentified marmot specimens we have determined the current distribution of the Alaska marmot to include the Brooks Range, the Ray Mountains, and the Kokrines Hills of northern Alaska. The Yukon River forms the boundary between the peripatric distributions of M broweri and M caligata in Alaska. Since M broweri …

Go to article

Chemical And Microbial Characterization Of North Slope Viscous Oils For Meor Application, Ashish L. Ghotekar Dec 2007

Chemical And Microbial Characterization Of North Slope Viscous Oils For Meor Application, Ashish L. Ghotekar

Engineering

Viscous oil reservoirs tend to be low-energy, low-gas/oil-ratio systems with high viscosities and are difficult to produce, transport and refine by conventional methods. Some of the commonly considered viscous oil recovery methods include processes such as steam flooding, in-situ combustion and miscible gas injection. The large viscous oil deposits in the ANS cannot be produced entirely by conventional methods like pressure displacement or waterflooding. Other methods such as miscible (gas injection and water alternating gas (WAG) also have limited success. Microbial enhanced oil recovery (MEOR) is one of the techniques for improving the oil recovery for viscous deposits. This method …

Go to article

Analysis And Comparison Of Age-Structured Assessment Models For Two Pacific Herring Populations, Peter-John F. Hulson Dec 2007

Analysis And Comparison Of Age-Structured Assessment Models For Two Pacific Herring Populations, Peter-John F. Hulson

Fisheries

Substantial research has been devoted to identify causes for decline the of Prince William Sound (PWS) Pacific herring in the early 1990's because of the proximity to the 1989 Exxon Valdez oil spill (EVOS). A potential source for decline has been identified with the isolation of disease in the PWS population. There have been limited investigations of PWS Pacific herring population dynamics related to other stocks in the Gulf of Alaska. The objective of this thesis was to compare observations and age-structured assessment (ASA) model results between PWS and Sitka Sound Pacific herring. Data conflicts were evaluated in the PWS …

Go to article

A Unified Framework For Solving Multiagent Task Assignment Problems, Kevin Cousin Dec 2007

A Unified Framework For Solving Multiagent Task Assignment Problems, Kevin Cousin

Theses and Dissertations

Multiagent task assignment problem descriptors do not fully represent the complex interactions in a multiagent domain, and algorithmic solutions vary widely depending on how the domain is represented. This issue is compounded as related research fields contain descriptors that similarly describe multiagent task assignment problems, including complex domain interactions, but generally do not provide the mechanisms needed to solve the multiagent aspect of task assignment. This research presents a unified approach to representing and solving the multiagent task assignment problem for complex problem domains. Ideas central to multiagent task allocation, project scheduling, constraint satisfaction, and coalition formation are combined to …

Go to article

Total Depletion Of Hg° In The Upper Troposphere-Lower Stratosphere, R. Talbot, Huiting Mao, Jack E. Dibb, M A. Avery Dec 2007

Total Depletion Of Hg° In The Upper Troposphere-Lower Stratosphere, R. Talbot, Huiting Mao, Jack E. Dibb, M A. Avery

Earth Sciences

Our current understanding of atmospheric mercury lacks fundamental details. Gas phase elemental mercury (Hg°) was measured aboard the NASA DC-8 research aircraft during the Intercontinental Chemical Transport Experiment-Phase B (INTEX-B) conducted in spring 2006 over the North Pacific. Our data confirm efficient chemical cycling of Hg° in the tropopause region and show that it is strongly anti-correlated with O3 there, yielding a tropospheric-stratospheric mixing curve of ∼−0.20 ppqv Hg°/ppbv O3. In addition, we found frequent total depletion of Hg° in upper tropospheric (8–12 km) air masses impacted by stratospheric influence. When O3 mixing ratios were >300 …

Go to article

Backbone Of Classroom Instruction, Bilqees Patel Dec 2007

Backbone Of Classroom Instruction, Bilqees Patel

Institute for Educational Development, Karachi

No abstract provided.

Go to article

Fall 2007 Commencement Program, University Of Alabama In Huntsville Dec 2007

Fall 2007 Commencement Program, University Of Alabama In Huntsville

Commencement Programs

No abstract provided.

Go to article

Illinois State University, One Hundred And Forty-Seventh Annual Commencement, December 16, 2006, Illinois State University Dec 2007

Illinois State University, One Hundred And Forty-Seventh Annual Commencement, December 16, 2006, Illinois State University

Commencement Programs

Normal, Illinois
Illinois State University
One Hundred and Forty-Seventh Annual Commencement
December 16, 2006

Go to article

South Dakota State University Graduation Exercises, December 15, 2007, Brookings, South Dakota, South Dakota State University Dec 2007

South Dakota State University Graduation Exercises, December 15, 2007, Brookings, South Dakota, South Dakota State University

Commencement Programs

Please be advised that the names listed in the program do not represent official confirmation of meeting the graduation requirements. The Graduation Exercises ceremony will commence with introductions by University President David L. Chicoine. Honorary Marshals for the event are Allen R. Branum, Acting Director of Diversity Enhancement and Professor Emeritus of Psychology, and Virginia Norris, Professor and Head of Psychology. Delivering the graduation address titled, "Knowledge Workers in Tomorrow's Economy," will be Aelred Kurtenbach, Cofounder of Daktronics, Inc. and Chairman of the Board of Directors. Dr. Carol J. Peterson, Provost and VIce Presidednt for Academic Affairs, will acknowledge faculty …

Go to article

Fall Commencement Program, December 15, 2007, Coastal Carolina University Dec 2007

Fall Commencement Program, December 15, 2007, Coastal Carolina University

Commencement Programs

Program of Commencement Exercises at Coastal Carolina University.

Go to article

Commencement Convocation Program, Usf, Graduate, December 15, 2007, University Of South Florida Dec 2007

Commencement Convocation Program, Usf, Graduate, December 15, 2007, University Of South Florida

USF Graduation and Convocation Programs

President's Fellow Medallion - David Ward

Go to article

Commencement Convocation Program, Tampa Campus, December 15, 2007, University Of South Florida Dec 2007

Commencement Convocation Program, Tampa Campus, December 15, 2007, University Of South Florida

USF Graduation and Convocation Programs

Outstanding Senior - Amanda Day; Global Leadership Award - Carol Bellamy and Juan Vázquez; King O'Neal Scholars - Michelle Denise Frey and Steven Martin Wilson

Go to article

First Prev Next Last