Digital Commons Network^™

Development Of Novel Backscatter Communication Systems Using A Multi-Hop Framework And Distributed Beamforming, Vikram Reddy Surendra

Masters Theses

"The goal of this thesis it to develop a wireless networking framework for battery-free devices based on passive, backscatter communication. In contrast to traditional, active communication systems, where the radio signal has to be generated using large amount of energy from batteries, the passive systems reflect the RF signal. The information is encoded by modulating the reflected signal, which consumes significantly less energy than active transmission. The existing passive, backscatter systems have limited communication capabilities. For example, the Radio Frequency Identification (RFID) systems support short-distance, direct communication between active reader and passive tags. The communication range is limited due to …

Analysis And Occurrence Of Disinfection By-Products In Fresh And Salt Water, Honglan Shi

Doctoral Dissertations

"Haloacetic acids, trihalomethanes, and bromate are important toxic water disinfection by-products (DBPs) that the US Environmental Protection Agency (USEPA) regulates in drinking water. Iodoacetic acids and halonitromethanes (HNMs) are the unregulated emerging DBPs that have been recently found in the disinfected drinking waters, and which have much higher toxicity than the regulated DBPs. The purpose of this study was to develop new analytical methods for analysis of these emerging DBPs, to study their occurrence in Missouri drinking water systems, and to investigate the occurrence and formation of these DBPs in saltwater and seawater based marine park aquaria. A new rapid …

C.S.I. Bulls#!T: The National Academy Of Sciences, Melendedez-Diaz V. Massachusetts, And Future Challenges To Forensic Science And Forensic Evidence,, Joelle A. Moreno

Faculty Publications

No abstract provided.

Unf Journal Winter 2010, University Of North Florida

UNF Journal

A university periodical for alumni and friends of the University of North Florida.

Missouri County Profiles: Adult Tobacco Use And Smoke-Free Policies, Center For Public Health Systems Science

Center for Public Health Systems Science

This report book provides county-specific tobacco data to use in policy advocacy efforts. Data included are from the largest special survey ever conducted in Missouri. This data set is envisioned to be a catalyst for change in Missouri, identifying and describing the health of communities to better inform health professionals and policy makers.

Private Schools: Baseline Policy Assessment, Center For Public Health Systems Science, Sarah Moreland-Russell, Bobbi Carothers, Laura Brossart

Center for Public Health Systems Science

This report presents the findings from a baseline assessment of tobacco policies in private schools in St. Louis County Districts 1 through 4. These findings were provided to the St. Louis County Department of Health and other CPPW stakeholders, including the Leadership Team and initiative grantees, to help inform intervention efforts for strengthening school tobacco policies.

The Hematopoietic Compartment Regulates Osteoblast Differentiation And Apoptosis During Cytokine Treatment, Matthew Christopher

All Theses and Dissertations (ETDs)

Adult hematopoiesis normally occurs in bone marrow, where hematopoietic stem cells: HSC) reside within a specialized microenvironment. At steady state, hematopoiesis state is regulated such that immature hematopoietic stem and progenitor cells: HSPC) are restricted to the bone marrow and are rarely observed in peripheral blood. Under certain circumstances, however, this regulation is loosened and significant numbers of HSPC are released to the circulation, a process termed "mobilization." Mobilization can be induced pharmacologically by a wide range of agents. Of these, the best characterized and most widely used mobilizing agent is Granulocyte-colony stimulating factor: G-CSF). G-CSF is widely used clinically …

La Vanguardia Y Sus Retornos: Confabulaciones Del Presente En Cuatro Escritores Latinoamericanos, Maria De Los Angeles Donoso Macaya

All Theses and Dissertations (ETDs)

La vanguardia y sus retornos: confabulaciones del presente en cuatro escritores latinoamericanos [The Avant-garde and its Returns: Confabulating the Present in Four Latin American Writers] When reading contemporary Latin American writers from different countries and distinct cultural backgrounds, the relevance of the avant-garde in their work becomes apparent. By placing close readings of texts by C├⌐sar Aira, Mario Bellatin, Roberto Bola├▒o, and Diamela Eltit, in dialogue with theoretical and philosophical works by Bergson, Nietzsche, Spinoza, and Deleuze, I argue that it is possible to recognize an unexpected and engaging return to the avant-garde in a present which has been commonly …

Local And Systemic Consequences Of Reducing Notch Signaling In Skin Keratinocytes, Shadmehr Demehri

All Theses and Dissertations (ETDs)

Notch is a transmembrane receptor that mediates short-range signaling between neighboring cells. Notch signaling has been implicated in various cellular and developmental processes essential in the life of metazoans. Specifically, Notch signaling plays a critical role in mammalian skin. Removal of Notch alleles in skin keratinocytes has been associated with an array of phenotypes with varying severity based on the identity and number of remaining Notch receptors. Phenotypes include carcinogenesis: in the case of Notch1 loss), transformation of hair follicles to epidermal cysts and neonatal lethality, the latter seen in the absence of all Notch signaling. Although these phenotypes were …

A Laboratory-Based Study Of Mood And Eating Behavior In Overweight Children, Andrea Goldschmidt

All Theses and Dissertations (ETDs)

Loss of control over eating refers to the sense that one cannot control what or how much one is eating. Loss of control eating is prevalent among overweight children and is associated with psychosocial impairment. Self-report data suggest that pediatric loss of control eating may be related to the experience of aversive emotions, with investigators theorizing that loss of control eating is a maladaptive means of alleviating negative mood. However, these data need to be substantiated using more objective methodology. The current study utilized a feeding laboratory paradigm to further explore the relation between mood and eating in 46 overweight …

Roles Of Inhibitory Interneurons In Cerebellar Cortical Processing For Oculomotor Control, Shane Heiney

All Theses and Dissertations (ETDs)

The cerebellar cortex is usually offered up as the prime example of a well-worked out circuit; indeed, its basic neuronal composition and organization has been known for over one hundred years. Yet mysteries still abound about the computations that are performed within its layers, and how these computations contribute to sensation and behavior. This project was an effort to look inside the cerebellar cortical circuit during behavior to see if I could shed some light on the computations being performed. The dissertation is divided into three main sections. In the first, I present the results of preliminary work performed by …

Conservation Of The Intracellular Bacterial Community Pathogenic Pathway In Urinary Tract Infection, David Rosen

All Theses and Dissertations (ETDs)

Urinary tract infections: UTIs) affect 13 million women annually in the United States. Uropathogenic Escherichia coli: UPEC) is the predominant etiologic agent of UTI; however, several other uropathogens, including Klebsiella pneumoniae, are also significant causative agents. In a murine cystitis model, UPEC utilize a multistep pathogenic pathway in which they invade and form intracellular bacterial communities: IBCs) within bladder facet cells. Type 1 pili, adhesive fimbriae, are necessary for UPEC binding and invasion of urothelial cells and formation of IBCs. UPEC ultimately disperse from the IBC, many with filamentous morphology, and proceed to infect other host urothelial cells. This work …

The Mechanisms And Roles Of Neural Feedback Loops For Visual Processing, Debajit Saha

All Theses and Dissertations (ETDs)

Feedback pathways are widely present in various sensory systems transmitting time-delayed and partly-processed information from higher to lower visual centers. Although feedback loops are abundant in visual systems, investigations focusing on the mechanisms and roles of feedback in terms of micro-circuitry and system dynamics have been largely ignored. Here, we investigate the cellular, synaptic and circuit level properties of a cholinergic isthmic neuron: Ipc) to understand the role of isthmotectal feedback loop in visual processing of red-ear turtles, Trachemys scripta elegans. Turtle isthmotectal complex contains two distinct nuclei, Ipc and Imc, which interact exclusively with the optic tectum, but are …

High-Speed Photoacoustic Microscopy In Vivo, Liang Song

All Theses and Dissertations (ETDs)

The overarching goal of this research is to develop a novel photoacoustic microscopy: PAM) technology capable of high-speed, high-resolution 3D imaging in vivo. PAM combines the advantages of optical absorption contrast and ultrasonic resolution for deep imaging beyond the quasi-ballistic regime. Its high sensitivity to optical absorption enables the imaging of important physiological parameters, such as hemoglobin concentration and oxygen saturation, which closely correlate with angiogenesis and hypermetabolism--two hallmarks of cancer. To translate PAM to the clinic, both high imaging speed and high spatial resolution are desired. With high spatial resolution, PAM can detect small structural and functional changes early; …

Virtue, Practical Guidance, And Practices, Carrie Vodehnal

All Theses and Dissertations (ETDs)

No abstract provided.

Pacemaker Heterogeneity In The Suprachiasmatic Nucleus: Origins And Network Implications, Alexis Webb

All Theses and Dissertations (ETDs)

In mammals, the suprachiasmatic nuclei: SCN) in the ventral hypothalamus function as a circadian pacemaker, controlling daily rhythms in behavior and physiology. Together the SCN contain approximately 20,000 neurons that maintain rhythms in firing rate and gene expression. Previous studies led to the assumption that single SCN neurons are capable of self-sustained circadian rhythms. Whether and which SCN neurons can maintain cell-autonomous daily oscillations has not been extensively tested. We measured PERIOD2::LUCIFERASE expression in isolated SCN neurons over multiple days to determine if all SCN neurons were circadian. We then examined neuropeptide content of the recorded neurons. We found that …

Dissolution, Formation, And Transformation Of The Lead Corrosion Product Pbo2: Rates And Mechanisms Of Reactions That Control Lead Release In Drinking Water Distribution Systems, Yanjiao Xie

All Theses and Dissertations (ETDs)

As one of the major lead corrosion products in lead service lines, lead(IV) oxide: PbO₂) can react with water through reductive dissolution, resulting in elevated lead concentrations in tap water. Limited data are available on the rates and mechanisms of PbO₂ dissolution. Information regarding the impact of water chemistry on the rates and mechanisms of PbO₂ dissolution can provide potential strategies to control the release of lead from corrosion products to drinking water. The present study investigated effects of water chemistry on the rates and mechanisms of PbO₂ dissolution, the equilibrium solubility of PbO_{2 …}

Antimicrobial Effect Of Transition Metal Oxide Nanoparticles, Zhipeng Wang

All Theses and Dissertations (ETDs)

No abstract provided.

The Impact Of Therapeutic Alliance On Outcomes In Parent-Child Dyadic Interventions, Ryan M. Smith

Antioch University Dissertations & Theses

An infant’s attachment relationship with primary caregivers has been demonstrated to have a long-term relationship to an individual’s social and emotional functioning throughout the lifespan. Recognizing the critical importance of this period, interventions to facilitate secure attachment are now being evaluated for treatment efficacy. Evaluation of these treatments has typically focused on the components of treatment, examining changes in maternal sensitivity, parental attachment representations, and concrete support to address basic needs, housing, or other contextual factors, and evidence has been found to support the inclusion of these factors. However, little is known regarding what elements of treatment impact the effectiveness …

Missouri County Profiles: Characteristics Of Missouri Tobacco Users, Center For Public Health Systems Science, Sarah Shelton, Amy Sorg, Stephanie Herbers

Center for Public Health Systems Science

This report is the first in a series of Missouri County Profiles. These reports were disseminated to tobacco control stakeholders throughout Missouri to support programmatic efforts and inform strategic planning of tobacco control activities. This report presents results from the first analysis, which sought to highlight characteristics of Missouri tobacco users and gather knowledge about tobacco use among Missourians.

Not So Black And White: The Color Of Perception In Corporate Layoffs, Carole A. Isom

Antioch University Dissertations & Theses

This research addressed the question of whether or not the perception exists that African Americans are disproportionately impacted during layoff periods within corporations. Portraiture was the selected method of inquiry for this research as it captures the experience of the participants and enables storytelling which is based upon perception as opposed to hard, quantitative data. Additionally, portraiture’s autobiographical roots supported my autoethnographic position, encouraging the artistic process while including aesthetic aspects. Portraiture allowed for the voice of the researcher everywhere: in the assumptions, preoccupations, and frameworks brought to the inquiry; in the questions asked; in the data gathered; in the …

The Art Of Caring: Woman And Restorative Justice, Peggy Lobb

Antioch University Dissertations & Theses

The process of restorative justice involves the caring compassion of others by providing support for the peaceful resolution of the conflict. The term restorative justice is used to describe a justice practice that has been in existence for hundreds of years in many indigenous communities. Recently, it is emerging in modern criminal justice systems as a way to obtain fair reparation for the victim and to offer an opportunity for the victim and the offender to mediate and reconcile after the offense to restore balance and peace to the community. The process involves the participation of the victim, offender, and …

Citizen Professionals: The Effective Practices Of Experts Helping Community Organizations, Sarah Hippensteel Hall

Antioch University Dissertations & Theses

Although numerous local, state, and federal laws and policies address water pollution, many problems remain. To address these problems thousands of groups of citizens, who are concerned with their water resources - rivers, streams, lakes, ponds, and groundwater - organized around the U.S. over the past several decades. To succeed, these community organizations need the resources and capacity to reach their goals. To gain capacity, some community organizations turn to people outside the organization for assistance. Citizen professionals are helpers who work jointly with an organization to help develop an organization's adaptive capacity to deal with challenges and achieve goals. …

Special Education Teacher Tenacity: The Leadership And Commitment Of Those Who Stay In The Field, Marilyn Shea

Antioch University Dissertations & Theses

Those who choose to teach special education have accepted some of the most challenging jobs teaching has to offer. Unfortunately for their students, almost half of special education teachers leave the profession within their first five years (Singer, 1992). Finding and keeping qualified special education teachers in positions working with more challenging students has become a national problem. Through qualitative interviews, this study examines the stories of 14 Colorado special educators. These teachers have demonstrated their commitment to the field by teaching for four or more years. Their stories give valuable insight into the issue of teacher commitment in difficult …

Capillary Electrophoresis Of Pteridines In Urine And Plants And Quantification Of Pharmaceutical And Personal Care Products In Missouri Waste Water, Stephen E. Gibbons

Doctoral Dissertations

"Capillary electrophoresis (CE) is a powerful technique that separates molecules based on their respective charge and hydrodynamic size. The major advantages of CE are high separation efficiency, small sample volume requirements, simple to no sample preparation and often organic solvents are not required for the separation.

The work presented in this dissertation utilized capillary electrophoresis for the analysis two different classes of compounds in different matrices. The first project investigated pteridines in urine and plants. The second project investigated pharmaceutical and personal care products (PPCP's) in Missouri waste water.

As cancer continues to be one of the top three causes …

The Potential For Conditional Cash Transfers To Influence Outcomes, Dawn Dziuba

All Theses and Dissertations (ETDs)

No abstract provided.

Change Your Mind: Neuroplasticity & Buddhist Transformation, Laura Vollmer

All Theses and Dissertations (ETDs)

No abstract provided.

The Struggle For Freedom, Justice, And Equality: The History Of The Journey Of Iranian Women In The Last Century, Poupak Tafreshi

All Theses and Dissertations (ETDs)

No abstract provided.

Surface Reactivity And Dissolution Rate Of Galena: Potential Impact Of Co2 Leakage From Geological Carbon Sequestration On Groundwater Quality, Kathleen O'Malley

All Theses and Dissertations (ETDs)

Geological carbon sequestration is one promising solution to mitigating CO2 emissions and curtailing global

Female Humpback Whale (Megaptera Novaeangliae) Reproductive Class And Male-Female Interactions During The Breeding Season, Meagan E. Jones

Antioch University Dissertations & Theses

This study examined whether female reproductive class (i.e., presence or absence of a calf) in humpback whales (Megaptera novaeangliae) affects female behavior and male-female interactions on the Hawaiian breeding grounds. From 2003-2008, 295 female-calf groups (with or without a male escort) and 256 female no-calf groups (with a male) were observed. Forty-one female no-calf groups were confirmed male-female pairs by genetic sexing or photo-identification. Focal follows of 36 male-female pairs and 50 female-calf groups (29 escorted and 21 unescorted female-calf groups) were analyzed for time budget and movement estimates. Relative fluke size (fluke photogrammetry, n=30) and sighting histories …