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2009

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General Theory Of Oscillon Dynamics, Marcelo Gleiser, David Sicilia Dec 2009

General Theory Of Oscillon Dynamics, Marcelo Gleiser, David Sicilia

Dartmouth Scholarship

We present a comprehensive, nonperturbative analytical method to investigate the dynamics of time-dependent oscillating scalar field configurations. The method is applied to oscillons in a φ4 Klein-Gordon model in two and three spatial dimensions, yielding high accuracy results in the characterization of all aspects of the complex oscillon dynamics. In particular, we show how oscillons can be interpreted as long-lived perturbations about an attractor in field configuration space. By investigating their radiation rate as they approach the attractor, we obtain an accurate estimate of their lifetimes in d = 3 and explain why they seem to be perturbatively stable …

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Probabilistic Remediation Evaluation Model For Chlorinated Solvents Considering Uncertainty, Hailian Liang Dec 2009

Probabilistic Remediation Evaluation Model For Chlorinated Solvents Considering Uncertainty, Hailian Liang

All Dissertations

The complex processes and expensive costs of source and plume remediation of dense, non-aqueous phase liquid (DNAPL) complicate the decision-making process for site remediation. Selection of remediation alternatives has been a big challenge due to the lack of tools that simultaneously evaluate the effectiveness of source and plume remediation and access the uncertainties in all major parameters. In this research, a new probabilistic remediation model, Probabilistic Remediation Evaluation Model for Chlorinated solvents sites (PREMChlor), has been developed. This is achieved through linking the analytical model REMChlor to a Monte Carlo modeling simulation package GoldSim via a FORTRAN Dynamic Link Library …

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A Scanpath Comparison Of The Salient Features Of Weather Among General Aviation Pilots Based On Training And Experience, Michael Sawyer Dec 2009

A Scanpath Comparison Of The Salient Features Of Weather Among General Aviation Pilots Based On Training And Experience, Michael Sawyer

All Dissertations

Over the last 20 years the number of annual accidents in general aviation has seen a steady decline. The annual number of fatal accidents, however, has remained relatively stable. Adverse weather is consistently cited as a leading cause of fatal accidents in general aviation; weather accidents have a fatality rate nearly four times that of other general aviation accidents. Reviews of accident data reveal that often these accidents occur when inexperienced pilots who are certified only for visual flight rules flight continue into adverse weather. The Situation Assessment Hypothesis suggests these accidents occur when pilots fail to accurately recognize weather …

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Visuohaptic Simulation Of A Borescope For Aircraft Engine Inspection, Deepak Vembar Dec 2009

Visuohaptic Simulation Of A Borescope For Aircraft Engine Inspection, Deepak Vembar

All Dissertations

Consisting of a long, fiber optic probe containing a small CCD camera controlled by hand-held articulation interface, a video borescope is used for remote visual inspection of hard to reach components in an aircraft. The knowledge and psychomotor skills, specifically the hand-eye coordination, required for effective inspection are hard to acquire through limited exposure to the borescope in aviation maintenance schools. Inexperienced aircraft maintenance technicians gain proficiency through repeated hands-on learning in the workplace along a steep learning curve while transitioning from the classroom to the workforce.
Using an iterative process combined with focused user evaluations, this dissertation details the …

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Ninth Grade Academies In South Carolina: Early Adopters Versus Late Adopters, Daniel Mullis Dec 2009

Ninth Grade Academies In South Carolina: Early Adopters Versus Late Adopters, Daniel Mullis

All Dissertations

The addition of ninth graders to the high school level brought administrative challenges: increased failure rate, truancy, and disciplinary infractions; as a solution, the Ninth Grade Academy concept evolved. This study's purpose was to examine South Carolina schools' academies to determine if early adopters were more effective than late adopters. The study's research was based on Institutional Theory with its main focus as Institutional Isomorphism. This qualitative study used survey results to determine how much administrators used data from existing academies before beginning their own implementation process. The study used institutional theory to assess whether new academies were a form …

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Field Evaluation Of The Immunocontraceptive Gonacontm In Reducing Eastern Gray Squirrel Fecundity In Urban Areas, Murali Pai Dec 2009

Field Evaluation Of The Immunocontraceptive Gonacontm In Reducing Eastern Gray Squirrel Fecundity In Urban Areas, Murali Pai

All Dissertations

The purpose of this study was to evaluate the immunocontraceptive GonaConTM in reducing fecundity in Eastern gray squirrel (EGS) (Sciurus carolinensis) in urban areas. Using a modified box trap design, 317 EGS were captured during four trapping sessions on a 5.66 ha site on Clemson University's main campus. EGS were handled using a restraint cone and sexed, weighed, ear-tagged and implanted with a microchip at the nape of the neck on all 'original' captures and later identified in subsequent captures as 'recaptures.' Blood samples and morphometric data were obtained on EGS before the immunocontraceptive GonaConTM was administered by …

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Synthesis, Modification Of Mesoporous Carbons And Their Application In Polymer Electrolyte Membrane Fuel Cells, Bing Liu Dec 2009

Synthesis, Modification Of Mesoporous Carbons And Their Application In Polymer Electrolyte Membrane Fuel Cells, Bing Liu

All Dissertations

Mesoporous carbon materials of carbon xerogel (CX) and silica-templated carbon (MC) were synthesized and explored as catalyst supports alternative to the most-commonly-used carbon black (CB) support, for polymer-electrolyte-membrane fuel cell (PEMFC) application. Pt catalyst was loaded on these carbons and electrodes were fabricated from them. These Pt-loaded carbon supports were characterized with XRD, TEM, ex-situ and in-situ cyclic voltammetry, etc. The fabricated electrodes were evaluated in single-cell testing in comparison with commercial CB-supported Pt catalyst fabricated electrodes. The experimental results showed that CX-supported Pt catalyst had close or better performance than that of CB-supported Pt, possibly due to CX's 3-D …

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Examining The Dynamics Of Managing Information Systems Development Projects: A Control Loss Perspective, Ravi Narayanaswamy Dec 2009

Examining The Dynamics Of Managing Information Systems Development Projects: A Control Loss Perspective, Ravi Narayanaswamy

All Dissertations

The failure rate of information systems development (ISD) projects continues to pose a big challenge for organizations. The success rate of ISD projects is less then forty percent. Factors such as disagreements and miscommunications among project manager and team members, poor monitoring and intermediary problems contribute to project failure.
Agency theory and leader member exchange (LMX) theories offer potential explanations for project failure. In particular, three monitoring strategies - control strategy, decision rights, and influence tactics were found to be effective in promoting project success. LMX theorists suggest that achieving congruence between the manager and subordinate regarding each other actions …

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Branchings And Time Evolution Of Reaction Networks, Changyuan Wang Dec 2009

Branchings And Time Evolution Of Reaction Networks, Changyuan Wang

All Dissertations

In this thesis I analyze flows in reaction networks in terms of branchings
in a digraph. If the coupled differential equations governing the rate
of change of probabilities X of a state or species are finite-differenced in time, a matrix equation (I + Adt)X(t+dt) = X(t) results, where X(t) is a vector giving the probabilities at time t and X(t+dt) is a vector giving the probabilities at time t + dt. I demonstrate that the matrix (I + Adt) may be written as the product of an incidence matrix and a weight matrix for a directed graph (digraph) representing the …

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Term Rewriting With Built-In Numbers And Collection Data Structures, Stephan Falke Dec 2009

Term Rewriting With Built-In Numbers And Collection Data Structures, Stephan Falke

Computer Science ETDs

Term rewrite systems have been extensively used in order to model computer programs for the purpose of formal verification. This is in particular true if the termination behavior of computer programs is investigated, and automatic termination proving for term rewrite systems has received increased interest in recent years. Ordinary term rewrite systems, however, exhibit serious drawbacks. First, they do not provide a tight integration of natural numbers or integers. Since the pre-defined semantics of these primitive data types cannot be utilized, reasoning about termination of ordinary term rewrite systems operating on numbers is often cumbersome or even impossible. Second, ordinary …

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Reconfigurable Middleware Architectures For Large Scale Sensor Networks, Sean M. Brennan Dec 2009

Reconfigurable Middleware Architectures For Large Scale Sensor Networks, Sean M. Brennan

Computer Science ETDs

Wireless sensor networks, in an effort to be energy efficient, typically lack the high-level abstractions of advanced programming languages. Though strong, the dichotomy between these two paradigms can be overcome. The SENSIX software framework, described in this dissertation, uniquely integrates constraint-dominated wireless sensor networks with the flexibility of object-oriented programming models, without violating the principles of either. Though these two computing paradigms are contradictory in many ways, SENSIX bridges them to yield a dynamic middleware abstraction unifying low-level resource-aware task reconfiguration and high-level object recomposition. Through the layered approach of SENSIX, the software developer creates a domain-specific sensing architecture by …

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Supervised Manifold Distance Segmentation, Guany Wang Dec 2009

Supervised Manifold Distance Segmentation, Guany Wang

Computer Science ETDs

In this paper, I will propose a simple and robust method for image and volume data segmentation based on manifold distance metrics. In this approach, pixels in an image are not considered as points with color values arranged in a grid. In this way, a new data set is built by a transform function from one traditional 2D image or 3D volume to a manifold in higher dimension feature space. Multiple possible feature spaces like position, gradient and probabilistic measures are studied and experimented. Graph algorithm and probabilistic classification are involved. Both time and space complexity of this algorithm is …

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Observations Of Badgers Preying On Black-Tailed Prairie Dogs, Daniel S. Licht Dec 2009

Observations Of Badgers Preying On Black-Tailed Prairie Dogs, Daniel S. Licht

The Prairie Naturalist

American badgers (Taxidea taxus) often visit black-tailed prairie dog (Cynomys ludovicianus) colonies, most likely in search of prey (Lomolino and Smith 2004, Shaughnessy and Cifelli 2004). Badgers are well suited to hunting fossorial prey such as prairie dogs by excavating burrows and capturing individuals belowground (Lindzey 2003). However, the ecological literature is sparse regarding details of how badgers hunt and capture prairie dogs underground. Eads and Biggins (2008) documented three occurrences of a badger excavating prairie dogs. That badger (apparently the same individual) had a den within the prairie dog town where captures occurred. This note …

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Mortality Of Cranes (Gruidae) Associated With Powerlines Over A Major Roost On The Platte River, Nebraska, Gregory D. Wright, Timothy J. Smith, Robert K. Murphy, Jeffery T. Runge, Robert R. Harms Dec 2009

Mortality Of Cranes (Gruidae) Associated With Powerlines Over A Major Roost On The Platte River, Nebraska, Gregory D. Wright, Timothy J. Smith, Robert K. Murphy, Jeffery T. Runge, Robert R. Harms

The Prairie Naturalist

Two 69-kilovolt powerlines spanning the Platte River in south central Nebraska are suspected to cause substantial mortality to sandhill cranes (Grus canadensis) and pose a threat to endangered whooping cranes (G. americana) that roost overnight on the river during spring and fall migrations. Most studies of crane collisions with powerlines in the region have focused on counts of carcasses away from night roosts on the river and none have accounted for potential biases in detecting carcasses. We found 61 carcasses of sandhill cranes below over-river segments of the two powerlines during 4 March to 7 April …

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Bed Site Selection Of Fawn Pronghorn In Custer State Park, South Dakota, Chad P. Lehman, Jamin D. Hartland, Barbara J. Keller, Joshua J. Millspaugh, Gary C. Brundige Dec 2009

Bed Site Selection Of Fawn Pronghorn In Custer State Park, South Dakota, Chad P. Lehman, Jamin D. Hartland, Barbara J. Keller, Joshua J. Millspaugh, Gary C. Brundige

The Prairie Naturalist

We evaluated pronghorn (Antilocapra americana) fawn bedding site characteristics on a prairie and ponderosa pine (Pinus ponderosa) landscape interface in Custer State Park, South Dakota. We radio-marked 16 adult female pronghorn and collected bed site information from their fawns during 2007~2008. We compared bed site selection with random sites (n = 74) during 2 periods; the early hiding phase when fawns were 1 ~28 days of age (n = 23 bed sites) and the later group phase when fawns were 29~60 days of age (n = 52 bed sites). During the hiding phase fawns selected dry …

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The Effectiveness Of A School-Wide Differentiated Home Room Academic Extension Re-Teaching Initiative On The Achievement And Proficiency Categories Of 8th-Grade Students With Varying Levels Of Cognitive Skills, Tamara J. Williams Dec 2009

The Effectiveness Of A School-Wide Differentiated Home Room Academic Extension Re-Teaching Initiative On The Achievement And Proficiency Categories Of 8th-Grade Students With Varying Levels Of Cognitive Skills, Tamara J. Williams

Student Work

The purpose of the study was to measure the effectiveness of a school-wide differentiated home room academic extension re-teaching initiative on the academic achievement and criterion-referenced assessment proficiency categories of 8th-grade students with varying levels of measured cognitive skills. Achievement measures were reading and math criterion-referenced assessment scores, core subject grades, and the reading and math Terra Nova Normal Curve Equivalent Norm Referenced Achievement Test subtest scores. At the conclusion of the research year 20 students moved into the highest measured criterion referenced reading test proficiency group (beyond proficient) and 33 students moved into the highest measured criterion referenced math …

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The Capabilities Conception Of The Individual, John B. Davis Dec 2009

The Capabilities Conception Of The Individual, John B. Davis

Economics Faculty Research and Publications

This paper advances a capabilities conception of the individual, and considers some of the problems involved in developing such a conception. It also makes claims about the nature of the capability space as a whole, frames personal development in terms of the idea of moving though the capability space, and argues that people are alike in being increasingly heterogeneous. A key problem for a capabilities conception of the individual is that some capabilities, such as belonging to social groups and having social identities, can undermine individuality. The paper discusses an example in which people can have social identities but can …

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December 2009 Commencement Program, Bowling Green State University Dec 2009

December 2009 Commencement Program, Bowling Green State University

Commencement Programs

No abstract provided.

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Substance Dualism, Richard Swinburne Dec 2009

Substance Dualism, Richard Swinburne

Faith and Philosophy: Journal of the Society of Christian Philosophers

No abstract provided.

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Volition And The Function Of Consciousness, Hakwan Lau Dec 2009

Volition And The Function Of Consciousness, Hakwan Lau

Faith and Philosophy: Journal of the Society of Christian Philosophers

No abstract provided.

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Dr. Strange Drug, Or: How I Learned To Stop Worrying And Love Authorized Generics, John M. Rebman Dec 2009

Dr. Strange Drug, Or: How I Learned To Stop Worrying And Love Authorized Generics, John M. Rebman

DePaul Journal of Health Care Law

No abstract provided.

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Aspirations And Expectations In Latino Youth: The Role Of Barriers And Support In The Transition Out Of High School, Rachel M. Feuer Dec 2009

Aspirations And Expectations In Latino Youth: The Role Of Barriers And Support In The Transition Out Of High School, Rachel M. Feuer

College of Liberal Arts & Social Sciences Theses and Dissertations

This study uses a possible selves framework to examine the future aspirations and expectation of Latino youth in the transition from high school. A mixed-methods design was used to explore the nature of youth's educational and occupational aspirations and expectations, including the gaps between expectations and aspirations and the gaps between expectations and behavior, and to examine the role of barriers and social support in youth's aspirations and expectations. Thirty-two Latino adolescents completed a quantitative survey while seniors in high school and then participated in one-on-one qualitative interviews on year later during their transition from high school. Results supported the …

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A Longitudinal Study Of The Outcomes From Participation In Wilderness Adventure Education Programs, Jason Phillip Cummings Dec 2009

A Longitudinal Study Of The Outcomes From Participation In Wilderness Adventure Education Programs, Jason Phillip Cummings

Master's Theses

The results from this study suggest that participants of wilderness adventure education programs offered by Outward Bound and the National Outdoor Leadership School felt challenged by many of the experiences from their programs. Interactions with their group helped in dealing with the challenges presented by the experience. The development of hard skills gave participants a confidence in their abilities to survive and feel safe in these wilderness environments, which allowed them to relax and enjoy the experience, develop new perspectives, become motivated and inspired, and develop a sense of independence. Participants developed a sense of growth and maturity from their …

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Evaluating Head Gestures For Panning 2-D Spatial Information, Matthew O. Derry Dec 2009

Evaluating Head Gestures For Panning 2-D Spatial Information, Matthew O. Derry

Master's Theses

New, often free, spatial information applications such as mapping tools, topological imaging, and geographic information systems are becoming increasingly available to the average computer user. These systems, which were once available only to government, scholastic, and corporate institutions with highly skilled operators, are driving a need for new and innovative ways for the average user to navigate and control spatial information intuitively, accurately, and efficiently. Gestures provide a method of control that is well suited to navigating the large datasets often associated with spatial information applications. Several different types of gestures and different applications that navigate spatial data are examined. …

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Nutrient Removal By Algae Grown In Co2-Enriched Wastewater Over A Range Of Nitrogen-To-Phosphorus Ratios, Laura Michelle Fulton Dec 2009

Nutrient Removal By Algae Grown In Co2-Enriched Wastewater Over A Range Of Nitrogen-To-Phosphorus Ratios, Laura Michelle Fulton

Master's Theses

In conventional wastewater treatment, biological nutrient removal (BNR) depends on bacterial assimilation for phosphorus removal and nitrification+denitrification for nitrogen removal, with the resulting loss of the fixed nitrogen resource. Alternatively, treatment by microalgae allows for assimilative removal of both phosphorus (P) and nitrogen (N) thereby avoiding the oxygen demand of nitrification and preserving fixed N for fertilizer use. Paddle wheel mixed high-rate ponds have much higher algal productivity than typical oxidation ponds, but even high-rate ponds often cannot grow sufficient algae to completely assimilate the N and P in domestic wastewater. Algae growth in high-rate ponds is usually limited by …

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Latent Semantic Web Service Discovery And Composition Framework, (Winnie) Yuki Yick Dec 2009

Latent Semantic Web Service Discovery And Composition Framework, (Winnie) Yuki Yick

Master's Theses

A web service is a software system that supports interoperable machine to machine interaction over the network. It can be any kind of service provided on the web that can exchange data between applications. In simple terms, it is any program that is callable by another program across the web using standard protocols. Web services are special because they are independent of the platform, programming language, and model design. In current web applications, more businesses are gradually publishing their business as services over the web. This growing number of web services available within an organization and on the Web raises …

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A Computational Model Of Apoptotic Osteocyte Correlation To Cortical Bone Remodeling Parameters, Michael Stephen Alexander Dec 2009

A Computational Model Of Apoptotic Osteocyte Correlation To Cortical Bone Remodeling Parameters, Michael Stephen Alexander

Master's Theses

The onset of osteoporosis caused by aging, disease states, and post-menopausal conditions significantly impacts patient quality of life, required healthcare funding, personal autonomy losses from increased fracture risk and the subsequent corrective surgery. Research has indicated that osteocyte apoptosis may be a key parameter in bone remodeling, raising the possibility of remodeling rate modulation for the mitigation of bone mass resorption. By developing therapies that target osteocyte apoptosis, it may be possible to prevent undesired bone remodeling activity while maintaining a healthy balance between damage formation in the form of microcracks induced by the strain environment and the removal of …

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A Neural Network Approach To Border Gateway Protocol Peer Failure Detection And Prediction, Cory B. White Dec 2009

A Neural Network Approach To Border Gateway Protocol Peer Failure Detection And Prediction, Cory B. White

Master's Theses

The size and speed of computer networks continue to expand at a rapid pace, as do the corresponding errors, failures, and faults inherent within such extensive networks. This thesis introduces a novel approach to interface Border Gateway Protocol (BGP) computer networks with neural networks to learn the precursor connectivity patterns that emerge prior to a node failure. Details of the design and construction of a framework that utilizes neural networks to learn and monitor BGP connection states as a means of detecting and predicting BGP peer node failure are presented. Moreover, this framework is used to monitor a BGP network …

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A Comparison Of Three Computational Procedures For Solving The Number Of Factors Problem In Exploratory Factor Analysis, Adam Vincent Piccone Dec 2009

A Comparison Of Three Computational Procedures For Solving The Number Of Factors Problem In Exploratory Factor Analysis, Adam Vincent Piccone

Dissertations

Three computational solutions to the number of factors problem were investigated over a wide variety of typical psychometric situations using Monte Carlo simulated population matrices with known characteristics. The standard error scree, the minimum average partials test, and the technique of parallel analysis were evaluated head-to-head for accuracy. The question of using principal components-based eigenvalues versus common factors-based eigenvalues in the analyses was also investigated. As a benchmark, the commonly used eigenvalues-greater-than-one criterion was included. Across all conditions, the principal components-based version of parallel analysis was found to most accurately recover dimensionality using sample correlation matrices drawn from populations with …

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Side-Effects Of Pesticides On The Life Cycle Of The Mite Pathogenic Fungus Neozygites Floridana, V. W. Wekesa, M. Knapp, I. Delalibera Dec 2009

Side-Effects Of Pesticides On The Life Cycle Of The Mite Pathogenic Fungus Neozygites Floridana, V. W. Wekesa, M. Knapp, I. Delalibera

All Peer-Reviewed Publications

The tomato red spider mite, Tetranychus evansi Baker and Pritchard, is an invasive species in Africa causing considerable damage to Solanaceous crops. The fungal pathogen Neozygites floridana Weiser and Muma from Brazil has been considered a potential candidate for introduction into Africa for the control of T. evansi. To be incorporated in the tomato production system, N. floridana has to be compatible with the pesticides used for the control of other pests and diseases. Pesticides used in tomatoes that might affect the fungus were therefore studied by the use of different methods. Two insecticides (Lambda-cyhalothrin and Methomyl), two acaricides (Propargite …

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