Digital Commons Network^™

Selective Multivariate Applications In Forensic Science, Caitlin Rinke

Electronic Theses and Dissertations

A 2009 report published by the National Research Council addressed the need for improvements in the field of forensic science. In the report emphasis was placed on the need for more rigorous scientific analysis within many forensic science disciplines and for established limitations and determination of error rates from statistical analysis. This research focused on multivariate statistical techniques for the analysis of spectral data obtained for multiple forensic applications which include samples from: automobile float glasses and paints, bones, metal transfers, ignitable liquids and fire debris, and organic compounds including explosives. The statistical techniques were used for two types of …

Structure, Stability, Vibrational, Thermodynamic, And Catalytic Properties Of Metal Nanostructures: Size, Shape, Support, And Adsorbate Effects, Farzad Behafarid

Electronic Theses and Dissertations

Recent advances in nanoscience and technology have provided the scientific community with new exciting opportunities to rationally design and fabricate materials at the nanometer scale with drastically different properties as compared to their bulk counterparts. A variety of challenges related to nanoparticle (NP) synthesis and materials characterization have been tackled , allowing us to make more homogenous, well defined, size- and shape-selected NPs, and to probe deeper and more comprehensively into their distinct properties. In this dissertation, a variety of phenomena relevant to nanosized materials are investigated, including the thermal stability of NPs and coarsening phenomena in different environments, the …

A Study Of The Degradative Capabilities Of The Bimetallic System: Mg(Pd/C) As Applied In The Destruction Of Decafluoropentane, An Environmental Contaminant, Douglas Tomlin

Electronic Theses and Dissertations

Pollution from hydrofluorocarbons (HFC) poses a serious challenge to the environmental community. Released from industrial operations, they have contaminated both the atmosphere and groundwater and are considered persistent in both media.1 For over the past 20 years, the practice of synthesizing hydrofluorocarbons as alternatives to chlorofluorocarbons (CFC) has been conducted in an effort to reverse the effects of stratospheric ozone layer depletion. 2,3 However, in doing so these new fluorinated compounds exhibited an unexpected property as a potent global warming greenhouse gas (GHG) with radiative forcing potentials in the range of 100 to 10,000 equivalents greater than carbon dioxide.4 Conversely, …

Probing Space: Formative Assessment In A Middle School Inquiry-Based Science Classroom, Clinton W. Anderson

Electronic Theses and Dissertations

This action research thesis was performed to explore the research questions: How did the use of formative assessment affect student performance data in understanding the concepts of the Sun-Earth-Moon system?, How did the use of learning scales as formative techniques impact student self-assessment of their knowledge of the Sun-Earth-Moon system?, How did the implementation of formative assessment techniques affect student discourse on the topic of the Sun-Earth-Moon system? Formative assessment techniques including "talk-friendly" probes, sticky bars, and agree-disagree statements were used in the classroom to expose gaps in knowledge, to facilitate discourse, and promote self-assessment. A triangulation of data included …

The Utility Of Verbal Display Redundancy In Managing Pilot's Cognitive Load During Controller-Pilot Voice Communications, Daniela Kratchounova

Electronic Theses and Dissertations

Miscommunication between controllers and pilots, potentially resulting from a high pilot cognitive load, has been a causal or contributing factor in a large number of aviation accidents. In this context, failure to communicate can be attributed, among other factors, to an inadequate human-system interface design, the related high cognitive load imposed on the pilot, and poor performance reflected by a higher error rate. To date, voice radio remains in service without any means for managing pilot cognitive load by design (as opposed to training or procedures). Such an oversight is what prompted this dissertation. The goals of this study were …

The Influence Of Components Of Positive Psychology On Student Development, Yo Sang Ha

Electronic Theses and Dissertations

Considering a wide range of student's delinquencies and problems, preventive intervention in school is strongly required for healthy student development. American School counselor Association (ASCA) has focused on three areas, academic development, career development, and personal/social development to provide various skills and learning opportunities for the successful life of students. During the past 50 years, psychologists have concentrated on the disease treatment model. However, unlike this psychological trend, positive psychology has paid attention to prevent school violence and delinquency. Further, Positive psychologists have discovered not only to prevent problems but also to facilitate human strengths and virtues to live successful …

Conservation And Population Biology: Genetics, Demography And Habitat Requirements Of The Atlantic Coast Beach Mice, Haakon Myklevoll Kalkvik

Electronic Theses and Dissertations

The conservation biology field seeks to preserve biodiversity and the processes shaping that variation. Conservation biology is intimately tied to evolutionary research, in order to identify evolutionary distinct lineages that may be in danger of disappearing. Interestingly, patterns and processes of lineage divergence and persistence change with respect to spatial and temporal scale. I seek to evaluate biodiversity, the factors that have shaped this heterogeneity, and how this variability persists. To accomplish this I used a phylogeographic approach as well as niche and population modeling on the Peromyscus maniculatus species group found widely distributed in North America. My emphasis was …

The Antecedents And Consequences Of Teacher Professional Discretion Over Curriculum And Instruction: A Grounded Theory Inquiry, Marc Spittler

Electronic Theses and Dissertations

With the ever-changing requirements of a secondary level of education and the application of standardized testing criteria to determine proficiency in mastery of the subject matter, the attempt to create a standard and acceptable curriculum for all school sites has left the control of the schools. Now classrooms are scrambling for focus, guidance and support with curriculum development and implementation. Over the last three decades, there have been numerous research studies that have examined the place of the classroom teacher in the process of creating curriculum for their classroom with mixed results. The efforts to reform secondary education, from the …

The Comradeship Of The Open Road: The Identity And Influence Of The Tin Can Tourists Of The World On Automobility, Florida, And National Tourism, David Michael Burel

Electronic Theses and Dissertations

The identity of the Tin Can Tourists of the World, the first recreation automobile organization, has been poorly defined in the historical discourse, the factors contributing to the 1919 formation of the organization in Tampa, Florida represents a landmark shift in tourism in America towards the automobile. The group’s subsequent solidification of a distinct identity gives insight beyond their organization. The thesis defines their identity as well as looks at their impact on American automobility and tourism. The thesis therefore focuses on the previously undefined concept of recreational automobility giving it definition and showing how the group helped to define …

Why Do Individuals Act Fairly Or Unfairly? An Examination Of Psychological And Situational Antecedents Of Organizational Justice, Deshani B. Ganegoda

Electronic Theses and Dissertations

Most studies on organizational justice have focused on individuals’ reactions to justice. As such, a key question has been left largely unanswered: Why do individuals act fairly or unfairly? The present research adopted a person-situation interactionist approach (Trevino, 1986) to examine psychological and situational antecedents of individuals’ fair behavior. The social identity model of deindividuation (SIDE; Reicher, Spears, & Postmes, 1995) and side-bet theory of continuance commitment (Becker, 1960) was used to examine how organizational identification and continuance commitment might influence employees’ fair or unfair behavior depending on an organization’s justice climate. Based on SIDE, it was hypothesized that organizational …

Laser Filamentation Interaction With Materials For Spectroscopic Applications, Matthew Weidman

Electronic Theses and Dissertations

Laser filamentation is a non-diffracting propagation regime consisting of an intense core that is surrounded by an energy reservoir. For laser ablation based spectroscopy techniques such as Laser Induced Breakdown Spectroscopy (LIBS), laser filamentation enables the remote delivery of high power density laser radiation at long distances. This work shows a quasiconstant filament-induced mass ablation along a 35 m propagation distance. The mass ablated is sufficient for the application of laser filamentation as a sampling tool for plasma based spectroscopy techniques. Within the scope of this study, single-shot ablation was compared with multi-shot ablation. The dependence of ablated mass on …

Somatechnologies Of Body Size Modification: Posthuman Embodiment And Discourses Of Health, Meghan Griffin

Electronic Theses and Dissertations

This project focuses on persistent gaps in philosophies of the body: the enduring mindbody divide in accounts of phenomenology, the unfulfilled promises of representing and inhabiting the body in online and virtual spaces, and the difference between health as quantified in medical discourse versus health as lived experience. These tensions are brought to light through the electronic food journal genre where the difficulty in capturing pre-noetic, outsideconsciousness aspects of experience and embodied health are thrown into relief against circulating cultural discourses surrounding health, body size, self-surveillance, and self-care. The electronic food journal genre serves as a space for users to …

Maritime Pirates And Foreign Terrorist Organizations: Complicit Against The United States And Nato?, William Lusk

Electronic Theses and Dissertations

Maritime piracy, a phenomenon which has plagued free maritime trade for thousands of years, has entered a new age of sophistication and global reverberation. These acts of illegal criminal activity in the late twentieth and early twenty-first centuries yield a significant profit margin for the perpetrators while creating considerable cost for ransom payments, security measures, capital, and human life. The classification of maritime pirates, as either criminals hoping to gain financial income or terrorists hoping to usher in political change, is warranted and compelling. If maritime pirates conduct their operations to institute political change, it is possible that flags of …

Medical School Prerequisite Courses Completed At Two-Year Colleges By Medical School Matriculants: An Analysis At The University Of Central Florida, Erin Myszkowski

Electronic Theses and Dissertations

Many medical school admissions personnel and pre-health advisors advise premedical students not to take the medical school prerequisite courses at two-year colleges because they believe the courses are less academically rigorous than the same courses at four-year institutions (Losada, 2009; Marie, 2009; Thurlow, 2008, 2009a, 2009b). According to this belief, premedical students who complete the medical school prerequisite courses at a two-year college could be at a disadvantage in regard to medical school admission compared to those students who complete the medical school prerequisite courses at a four-year institution. In an effort to analyze these perceptions, this study examined factors …

Parametric Study Of The Frequency-Domain Thermoreflectance Technique, C. Xing, C. Jensen, Z. Hua, Heng Ban, D. H. Hurley, M. Khafizov, J. R. Kennedy

Mechanical and Aerospace Engineering Faculty Publications

Without requiring regression for parameter determination, one-dimensional (1D) analytical models are used by many research groups to extract the thermal properties in frequency-domain thermoreflectance measurements. Experimentally, this approach involves heating the sample with a pump laser and probing the temperature response with spatially coincident probe laser. Micron order lateral resolution can be obtained by tightly focusing the pump and probe lasers. However, small laser beam spot sizes necessarily bring into question the assumptions associated with 1D analytical models. In this study, we analyzed the applicability of 1D analytical models by comparing to 2D analytical and fully numerical models. Specifically, we …

Microwave-Assisted Wet Chemical (Mawc) Synthesis Of Lithium Iron Phosphate, Shangzhao Shi

Dissertations, Master's Theses and Master's Reports - Open

LiFePO4 is a Co-free battery material. Its advantages of low cost, non-toxic and flat discharge plateau show promising for vehicle propulsion applications. A major problem associated with this material is its low electrical conductivity. Use of nanosized LiFePO4 coated with carbon is considered a solution because the nanosized particles have much shorter path for L+ ions to travel from the LiFePO4 crystal lattice to electrolytes. As other nano material powders, however, nano LiFePO4 could have processing and health issues.

In order to achieve high electrical conductivity while maintaining a satisfactory manufacturability, the particles should possess both of the nano- and …

Online Distribution Management Framework By Incorporating Wind Generation, Bhairavi Pandya

Dissertations, Master's Theses and Master's Reports - Open

In distribution system operations, dispatchers at control center closely monitor system operating limits to ensure system reliability and adequacy. This reliability is partly due to the provision of remote controllable tie and sectionalizing switches. While the stochastic nature of wind generation can impact the level of wind energy penetration in the network, an estimate of the output from wind on hourly basis can be extremely useful. Under any operating conditions, the switching actions require human intervention and can be an extremely stressful task. Currently, handling a set of switching combinations with the uncertainty of distributed wind generation as part of …

Robustness Of Speckle Imaging Techniques Applied To Horizontal Imaging Scenarios, Jeremy P. Bos

Dissertations, Master's Theses and Master's Reports - Open

Atmospheric turbulence near the ground severely limits the quality of imagery acquired over long horizontal paths. In defense, surveillance, and border security applications, there is interest in deploying man-portable, embedded systems incorporating image reconstruction methods to compensate turbulence effects. While many image reconstruction methods have been proposed, their suitability for use in man-portable embedded systems is uncertain. To be effective, these systems must operate over significant variations in turbulence conditions while subject to other variations due to operation by novice users. Systems that meet these requirements and are otherwise designed to be immune to the factors that cause variation in …

Life-Patterns On The Periphery : A Humanities Base For Development Imperatives And Their Application In The Chicago City-Region, Kevin Hodur

Dissertations, Master's Theses and Master's Reports - Open

Life-Patterns on the Periphery: A Humanities Base for Development Imperatives and their Application in the Chicago City-Region is informed by the need to bring diverse fields together in order to tackle issues related to the contemporary city-region. By honouring the long-term economic, social, political, and ecological imperatives that form the fabric of healthy, productive, sustainable communities, it becomes possible to setup political structures and citizen will to develop distinct places that result in the overlapping of citizen life patterns, setting the stage for citizen action and interaction.

Based in humanities scholarship, the four imperatives act as checks on each other …

Charge And Spin Transport In Nanoscale Junction From First Principles, Subhasish Mandal

Dissertations, Master's Theses and Master's Reports - Open

Recently nanoscale junctions consisting of 0-D nanostructures (single molecule) or 1-D nanostructures (semiconducting nanowire) sandwiched between two metal electrodes are successfully fabricated and characterized. What lacks in the recent developments is the understanding of the mechanism behind the observed phenomena at the level of atoms and electrons. For example, the origin of observed switching effect in a semiconducting nanowire due to the influence of an external gate bias is not yet understood at the electronic structure level. On the same context, different experimental groups have reported different signs in tunneling magneto-resistance for the same organic spin valve structure, which has …

Invasion Patterns Of Emerald Ash Borer And European Earthworms In Forested Ecosystems, Lindsey M. Shartell

Dissertations, Master's Theses and Master's Reports - Open

Invasive and exotic species present a serious threat to the health and sustainability of natural ecosystems. These species often benefit from anthropogenic activities that aid their introduction and dispersal. This dissertation focuses on invasion dynamics of the emerald ash borer, native to Asia, and European earthworms. These species have shown detrimental impacts in invaded forest ecosystems across the Great Lakes region, and continue to spread via human-assisted long distance dispersal and by natural modes of dispersal into interior forests from areas of introduction. Successful forest management requires that the impact and effect of invasive species be considered and incorporated into …

The Impact Of Balsamo (Myroxylon Balsamum L. Harms) On Coffee Yield And Household Income In El Balsamar, El Salvador, Evan A. Anderson

Dissertations, Master's Theses and Master's Reports - Open

El Balsamar is a community that relies upon coffee trees intercropped with the balsamo tree (Myroxylon balsamum L. Harms) for a substantial portion of household income. The balsamo tree is valued for its resin which is used as medicine in the community and sold commercially. Farmers believe that the shade from the balsamo tree decreases coffee yield compared to the shade from non balsamo species. Thirty coffee farms were studied, each set up as a paired plot. When cover type was balsamo, coffee yield was more likely to decrease. Plots with higher basal area were more likely to be …

Biofilm Responses To Salmon Carcass Analog Addition In Central Idaho Streams, Jonathan D. Ebel

Dissertations, Master's Theses and Master's Reports - Open

Pacific salmon populations have declined due to human activity in the Pacific Northwest, resulting in decreased delivery of marine-derived nutrients to streams. Managers use artificial nutrient additions to increase juvenile salmon growth and survival and assume that added nutrients stimulate biofilm production, which propagates up the food web to juvenile salmon. We assessed biofilm responses (standing crop, nutrient limitation, and metabolism) to experimental additions of salmon carcass analog in tributaries of the Salmon River, Idaho in 2010 and 2011. Biofilm standing crop and nutrient limitation did not respond to analog, but primary productivity and respiration increased in the subset of …

Berry-Esseen Bounds For Nonlinear Statistics, And Asymptotic Relative Efficiency Between Correlation Statistics, Raymond E. Molzon

Dissertations, Master's Theses and Master's Reports - Open

Four papers, written in collaboration with the author’s graduate school advisor, are presented. In the first paper, uniform and non-uniform Berry-Esseen (BE) bounds on the convergence to normality of a general class of nonlinear statistics are provided; novel applications to specific statistics, including the non-central Student’s, Pearson’s, and the non-central Hotelling’s, are also stated. In the second paper, a BE bound on the rate of convergence of the F-statistic used in testing hypotheses from a general linear model is given. The third paper considers the asymptotic relative efficiency (ARE) between the Pearson, Spearman, and Kendall …

Geophysical And Geological Analysis Of The Collingwood Member Of The Trenton Formation, Ryan M. Banas

Dissertations, Master's Theses and Master's Reports - Open

The Collingwood Member is a mid to late Ordovician self-sourced reservoir deposited across the northern Michigan Basin and parts of Ontario, Canada. Although it had been previously studied in Canada, there has been relatively little data available from the Michigan subsurface. Recent commercial interest in the Collingwood has resulted in the drilling and production of several wells in the state of Michigan.

An analysis of core samples, measured laboratory data, and petrophysical logs has yielded both a quantitative and qualitative understanding of the formation in the Michigan Basin. The Collingwood is a low permeability and low porosity carbonate package that …

Comparing Satellite And Ground-Based Observations Of Paroxysmal Degassing Events At Etna Volcano, Italy, Céline L. Mandon

Dissertations, Master's Theses and Master's Reports - Open

Mount Etna, Italy, is one of the most active volcanoes in the world, and is also regarded as one of the strongest volcanic sources of sulfur dioxide (SO₂) emissions to the atmosphere. Since October 2004, an automated ultraviolet (UV) spectrometer network (FLAME) has provided ground-based SO₂ measurements with high temporal resolution, providing an opportunity to validate satellite SO₂ measurements at Etna. The Ozone Monitoring Instrument (OMI) on the NASA Aura satellite, which makes global daily measurements of trace gases in the atmosphere, was used to compare SO₂ amount released by the volcano during paroxysmal lava-fountaining …

Slope Stability Analysis Of The Pacaya Volcano, Guatemala, Using Limit Equilibrium And Finite Element Method , Patrick. Manzoni

Dissertations, Master's Theses and Master's Reports - Open

The Pacaya volcanic complex is part of the Central American volcanic arc, which is associated with the subduction of the Cocos tectonic plate under the Caribbean plate. Located 30 km south of Guatemala City, Pacaya is situated on the southern rim of the Amatitlan Caldera. It is the largest post-caldera volcano, and has been one of Central America’s most active volcanoes over the last 500 years. Between 400 and 2000 years B.P, the Pacaya volcano had experienced a huge collapse, which resulted in the formation of horseshoe-shaped scarp that is still visible. In the recent years, several smaller collapses have …

Understanding "Just Enough" Computer Users: Motivation Style And Proficiency, Harriet Cook King

Dissertations, Master's Theses and Master's Reports - Open

Among daily computer users who are proficient, some are flexible at accomplishing unfamiliar tasks on their own and others have difficulty. Software designers and evaluators involved with Human Computer Interaction (HCI) should account for any group of proficient daily users that are shown to stumble over unfamiliar tasks. We define "Just Enough" (JE) users as proficient daily computer users with predominantly extrinsic motivation style who know just enough to get what they want or need from the computer. We hypothesize that JE users have difficulty with unfamiliar computer tasks and skill transfer, whereas intrinsically motivated daily users accomplish unfamiliar tasks …

Multimodal Performance And Reliability Analysis Of The Pierre Auger Observatory North Site, Maira Maskevics

Dissertations, Master's Theses and Master's Reports - Open

The Pierre Auger Cosmic Ray Observatory North site employs a large array of surface detector stations (tanks) to detect the secondary particle showers generated by ultra-high energy cosmic rays. Due to the rare nature of ultra-high energy cosmic rays, it is important to have a high reliability on tank communications, ensuring no valuable data is lost. The Auger North site employs a peer-to-peer paradigm, the Wireless Architecture for Hard Real-Time Embedded Networks (WAHREN), designed specifically for highly reliable message delivery over fixed networks, under hard real-time deadlines.

The WAHREN design included two retransmission protocols, Micro- and Macro- retransmission. To fully …

Coordination Chemistry Of Bis(Benzyl)Phosphinate, John S. Maass

Dissertations, Master's Theses and Master's Reports - Open

The work presented in this dissertation deals with the coordination chemistry of the bis(benzyl)phosphinate ligand with vanadium, tungsten and cobalt. The long term goal of this project was to produce and physically characterize high oxidation state transition metal oxide phosphinate compounds with potential catalytic applications.

The reaction of bis(benzyl)phosphinic acid with VO(acac)₂ in the presence of water or pyridine leads to the synthesis of trimeric vanadium(IV) clusters (V₃(µ₃-O)O₂)(µ₂-O₂P(CH₂C6H5)₂)₆(H2O) and (V₃(µ₃-O)O₂)(µ₂-O₂P(CH₂C_{6 …}