Digital Commons Network^™

Sensor Network Coverage And Data Aggregation Problem: Solutions Toward The Maximum Lifetime, Li Yin

Masters Theses

"In the coverage problem, an optimal solution is proposed for the maximum lifetime sensor scheduling problem, which could find the upper bound of a sensor network's lifetime. This research reveals the relationship between the degree of redundancy in sensor deployment and achievable extension on network lifetime, which can be a useful guide for practical sensor network design"--Introduction, page 4.

Barriers And Best Practices For Material Management In The Healthcare Sector, Carlos Callender

Masters Theses

"For many years, the primary focus of the healthcare sector has been to provide patients with the best quality of care. Recently, with the escalating cost of supplies and the severe competition among healthcare providers, the pressure on material managers to operate more cost-efficiently without compromising the high patient care standards has significantly increased. While other sectors have experienced success through the deployment of supply chain management practices, the healthcare sector has not seen major improvements in this area. However, in spite of the uniqueness and complexity of the healthcare supply chain, opportunities for improvements are plentiful. Thus, this thesis …

The Importance And Influence Of Groundwater Fluctuations In Phytoremediation, Jeff A. Weishaar

Masters Theses

"The primary purpose of this research is to study the relationship between microbial degradation and plant uptake of volatile hydrocarbons, such as benzene, toluene, ethylbenzene and xylene. While these compounds are known to biodegrade and are capable of transport into plant tissue, any relationship between the two removal mechanisms remains largely unknown. The goal of this work is to better understand the interactions of these multiple biological processes within a phtytoremediation effort"--Introduction, page 3.

Energy Efficient Processor Operation And Vibration Based Energy Harvesting Schemes For Wireless Sensor Nodes, Phani Kumar Gajjala

Masters Theses

"A wireless Sensor Network (WSN) is a network of spatially distributed autonomous sensors deployed in the environment in order to cooperatively monitor physical or environmental conditions such as temperature, sound, pressure, motion or pollutants at different locations. Each node in a sensor network is equipped with a radio transceiver, a microprocessor and an energy source such as a battery which should be replaced periodically. To increase the lifetime of the network keeping the small size in mind, methods should be put in place to reduce the power consumption of the sensor node or increase the node life and/or to supply …

Cognitive Biases In Risk Management, William Thomas Siefert

Masters Theses

"This thesis contends that most Risk Management/Mitigation programs fail to be as effective as they could be due to a number of mostly overlooked drivers, such as motivation and cognitive biases. The issue of cognitive biases is very seldom addressed. When questioned, most engineers purport to not have any biases. They insist that they use only logic, reasoning, and math to make decisions. A set of data was collected and reviewed for this thesis. The data presented shows that cognitive biases do affect the risk management/mitigation process. Knowledge of these biases and their potential impact on a project will lead …

Toward Improving Performance Measurement In Public Sector Organizations, Matthew Thomas Kutz

Masters Theses

"The objective of this research is to investigate various means of improving the performance measurement methods for public sector organizations. A case study is conducted using data from the Missouri Department of Transportation (MoDOT). As a government organization, MoDOT must publish measurements of its performance for the general public and for the legislators who provide funding. Currently, MoDOT produces a quarterly publication, called the Tracker, for performance measurement reporting. This research hypothesizes that the Tracker is not an effective performance measurement system and stakeholders of MoDOT would benefit from a more concise and pointed report of MoDOT performance. A software …

Manufacturing And Characterization Of Soy-Based Pultruded Polyurethane Composites, Rama Bhadra Raju Vuppalapati

Masters Theses

"In the recent past, composites have been finding various applications in civil infrastructure, marine, transportation, automotive and non-automotive applications by replacing metals in structural components. Pultrusion is considered to be a cost effective method for manufacturing composite materials.

Polyurethane resin systems form a good alternative to the conventional styrene based systems in pultrusion due to their better physical, chemical and mechanical properties. Polyols derived from soybean oil along with isocyanates produce polyurethanes that can match in many aspects with one derived from the petrochemical polyols. Even though, polyurethanes have good properties there are lots of challenges like designing unique material …

Towards A Methodology For Integrated Freeform Manufacturing Systems Development With A Control Systems Emphasis, Jacquelyn K. Stroble

Masters Theses

"A variety of fully integrated Freeform Fabrication (FFF) systems have been developed, a selected group for research and several for commercialization. The design methodology behind most of them is not documented, standardized, or rational. It is important to understand that the final product from any integrated system is affected not only by the unit manufacturing processes themselves, but also by the extent the individual units are assimilated into an integrated process. Thus, a scheme consisting of eight steps and the salient five elements necessary to create or retrofit an existing system to achieve an Integrated Freeform Manufacturing System (FFMS) is …

Compressor Valve Failure Detection And Prognostics, Raghuram Puthali Ramesh

Masters Theses

"Reciprocating compressors are commonly used machinery for industrial applications. Unscheduled downtime and maintenance activity on the compressors causes considerable loss in throughput and efficiency of a plant. Of all the failures that cause unscheduled downtime in reciprocating compressors, valve related causes are predominant. Most of the failures associated with the valves are tracked to the failure of moving elements within the valve. Achieving higher reliability of critical reciprocating systems requires continuously monitoring the system and performing dynamic analysis of the sensory data for valve fault diagnosis. Continuous monitoring will improve the time and cost to repair through keeping a constant …

Enhanced Print Performance Of Water-Based Rotogravure Inks Through Rheological Balance, Rurou Mai

Masters Theses

Water-based inks have been of more and more interest to the printing and ink industry. Compared with solvent-based inks, water-based inks have more complex formulations because of their higher surface tensions, lower drying speed, foaming problems, pH balance, and different rheological properties. This work explores the significant effects of various rheology modifiers, including non-associative and associative thickeners, on the rheological properties of a water-based rotogravure ink system. Particular emphasis is given to thickening efficiency, pH stability, particle size, system compatibility, temperature stability, and printability on vinyl substrates. Wire-wound lab rods and a Moser Sheet-fed Gravure Proofing Press were employed to …

Effects Of Live Music On Pain, Mood, And Exercise Adherence With Rehabilitation Patients, Victoria Storm

Masters Theses

Incorporating music into treatment protocols is a non-pharmacological approach to pain management. Music can aid in mood and motivation, and assists in coordination of movement through rhythmic entrainment. Few studies have looked at the effectiveness of music on pain and mood while actively engaged in exercise. In this study, patients in an inpatient physical rehabilitation facility were provided with rhythmically synchronized music during upper extremities exercises. Self-reported ratings (McGill Pain Questionnaire - Short Form and Feeling Scale) of pain and mood were taken through a pretest post-test between subjects group design. Rate of Perceived Exertion (Borg's RPE) was taken post-test …

Computer Model To Select Leed Certification For Building Projects, Ruba Mirghani Mohammed

Masters Theses

According to the US Green Building Council (USGBC) residential and commercial buildings in the United State consume huge amounts of natural resources; pollute the environment, and generate large amounts of waste, all of which affect the environment, economy, public health, and productivity. As a result, USGBC committees developed the Leadership in Energy and Environmental Design (LEED) rating system to help professionals improve the quality of buildings and lessen their impact on the environment.

The (LEED) Green Building Rating System is a point-based system for certifying the level of a building's sustainability. There are four LEED certification categories: (1) Certified, (2) …

Thermodynamics Of Metals Adsorption Onto Uranium Dioxide, Koi Ling Lim

Masters Theses

Wastes and pollution containing uranium are released to the environment through mining, ore processing, industrial manufacture of nuclear fuel and weapons materials, and the disposal of spent nuclear fuel. There are a wide variety of processes that can affect UO₂ stability. This research focuses on the surface reactivity of UO₂ in reducing aqueous solutions, with an emphasis on assessment of the pH-dependent surface charge, reactive surface area, and the adsorption of dissolved lead (Pb), cadmium (Cd), lanthanum (La) onto UO₂ particles. A surface complexation model was used to explain the adsorption and titration phenomena of UO_{2 …}

Resilience And Depressive Symptoms In Midlife Women, Keverne L. Lehman

Masters Theses

Rates of depression are increasing throughout the world, with women experiencing depression twice as often as men. This study utilized the Neuman Systems Model to examine the relationship in midlife women between depressive symptoms and resilience. Women ages 35-55, selected from four health care settings, completed written surveys on demographic information, life events, depression, and resilience. Results supported depressive symptoms as a health concern for mid-life women: 32% reporting current or previous treatment for depression, and 24% screening positive for depression. Resilience, measured by the Polk Resilience Patterns Scale, was related to education, perceived health, conflict in the living situation, …

Caustic Treatment Of The Pulp: Caustic Recovery By Reverse Osmosis, Miroslav Suchy

Masters Theses

The benefit of caustic treatment on changing cellulose properties has long been known. When the treated pulp is later intended for use in personal or in health care product industries, it is important that all residual chemicals are removed and that the pure cellulose or carbohydrate portion of the pulp remains. The removal is usually facilitated by washing. Due to the low caustic concentration in the washing filtrates the removal of the excess water by standard techniques such as evaporation would not be economical.

The main objective of this investigation was to evaluate the concept of using reverse osmosis for …

Synthesis And Characterization Of Inosamines, Sing Raj Gurung

Masters Theses

This project is concerned with the preparation of scyllo-inosarnine hydrochloride 6, a biologically active compound, which bears six successive stereogenic centers. The synthesis of this compound would help elucidate the involvement of inosamines in biological nitrogen fixation. myo-Inositol served as the starting material to synthesize target compound 6. Regioselective protection and deprotection of myo-inositol provided azide 43 as key intermediate. In the final steps deprotection of five benzyl groups and reduction of azido group was achieved by catalytic hydrogenation. scyllo-Inosamine hydrochloride 6 was fully characterized by m.p., ¹H NMR, ¹³C NMR, IR, EA and via …

Surface Topography Contribution To Rfid’S Tags Efficiency Related To Resistivity, Mario A. Cruz

Masters Theses

The Radio Frequency Identification (RFID) is one of the new technologies with more vision and acceptance oriented to the distribution and storage industries. The RFID is a technology that can be used to identify, track and store information about groups of products, individual items, or product components, using radio waves. The RFID device needs an antenna in order to receive a signal and transmit information. The stamping process applied today to produce the RFID antenna works with foil or copper. These etched metal RFID tags offer good benefits, but the production cost is too high to achieve a widespread implementation. …

The Analysis Of Ceramic Symbolism From The First Street Site In Barbados, Aya Hashimoto

Masters Theses

The expression of race and racism in material culture is of increasing interest in historical archaeology ( e.g., Epperson 1990, 1999, 2000; Mullins 1996, 1999). This study investigates 6 ceramic sherds from one vessel associated with a white urban domestic site on First Street, in Holetown Barbados. This vessel conveys a racist message. A black slave in a loincloth serving tea to a white person is transfer printed on the ceramic. The ceramic seems to be an annular designed pearlware from England in the first half of the 19^th century.

By interpreting the meanings of the ceramic decoration, this …

A Statistical Analysis Of The Distribution Of Roads Salt In Blueberry Farm Soils Of Van Buren County, Michigan, Melissa M. Kovach

Masters Theses

The purpose of this research is to compare and analyze the leaching of road salt (sodium chloride) in soils of blueberry farms. Due to recent events in Ottawa County, Michigan, road salt is increasingly being blamed for blueberry production loss. Sodium chloride is harmful because once a significant amount of salt enters the soil profile the salt is unable to be flushed out, and reduces the chance for nutrients to reach the plant for effective growth. This study tested the farms' soils for salinity before winter (October 2005), during winter (March 2006) and after winter (May 2006) to determine if …

Nonprofit Arts Organizations In Grand Rapids, Michigan: An Exploratory Study, Ruth Terry

Masters Theses

To date little research at the local level has been conducted regarding arts and cultural nonprofits. This information is necessary to determine the future course of this sub-sector in Grand Rapids, Michigan. The purpose of this survey is to create a “snapshot” of area nonprofit 501(c)(3) arts agencies and provide information to arts professionals, arts advocates, and policymakers. Through a review of the literature, questions for an exploratory survey were generated. Findings show that participants in this sample found the local arts community and their own financial systems effective. However, additional findings and other studies show that further investigation is …

Investigation Of The Effects Of A Rapid Response Team On Nurse Satisfaction, Collaboration, And Communication, Jacob William Ainsworth

Masters Theses

The positive effects of Rapid Response Teams (RRTs) on clinical outcomes are well known; however little is known about the effects of the RRT on the registered nurses (RNs) who utilize it. The purpose of this study was to a) examine the overall perceptions of nurses on satisfaction, collaboration, and communication and b) explore the differences in perceptions of satisfaction, collaboration, and communication between RNs who have utilized the RRT versus those who have not using a descriptive design. Data were collected by questionnaires from a sample of 340 RNs who worked at a midwestem institution. The results indicated a …

Human Trafficking: A Theoretical Application Of Anomie On The Tier Placement System Utilized By The U.S. Department Of State’S “Trafficking In Persons” Report, Jennifer L. Melvin

Masters Theses

This study reviews the U.S. Department of State’s Trafficking in Persons Report. Specifically, the purpose of the current study is to utilize data, consistent with anomic theory, in order to assess the validity of the tier plaeement system utilized by the Trafficking in Person’s Report. In order to develop a baseline of information, a review of the literature available on human trafficking was conducted. Subsequently, through the employment of various statistical analyses (i.e. ANOVA, logistic regression), an examination of the Trafficking in Person’s Report was conducted in order to assess the validity of the tier placement system in accordance with …

Identification And Characterization Of Cellular Targets Of The Bacterial Cytotoxin Yopt In Saccharomyces Cerevisiae, Paul David Caccamo

Masters Theses

Human pathogenic Yersinia spp. utilize Type III Secretion to deliver six effector proteins into host cells. The injected proteins resemble eukaryotic signal transduction molecules and are capable of disrupting signaling pathways in order to subvert the functions of the targeted cell or disrupt communication with surrounding cells. As a result, bacterial invaders are not only able to survive the threat of a host immune response, but can thrive despite it. YopT is a cysteine protease that cleaves RhoGTPases, releasing them from the membrane and thus from their role as initiators of signaling pathways, including the nucleation of actin and …

Linear Enamel Hypoplasia And Dental Disease: Implications Of Health And Lifestyle Behaviors Of The Urban Enslaved From Two Burial Grounds In Bridgetown, Barbados, Jennifer Yamazaki

Masters Theses

This project investigates aspects of diet, health, and lifestyles of enslaved Africans of Bridgetown, Barbados during the 17th-19th centuries. The dentition of 10 Pierhead and Fontabelle individuals was examined to provide evidence of stress and coping capacities experienced within the urban context of slavery. Linear enamel hypoplasias (LEH), dental disease, and cultural modifications were noted. The frequencies of the pathologies were calculated and the peak age of stress occurrence for LEH were timed and compared with other New World enslaved populations in order to determine if differences existed in overall health and lifestyle experiences between those enslaved in cities and …

Vertebral Age Estimation: An Examination Of The Seventh Cervical, Seventh Thoracic, And Fourth Lumbar Vertebrae, Holly Hernandez

Masters Theses

This project examines the utility of vertebral osteophyte development to estimate age at death. Skeletal joint degeneration is a common method for estimating individuals' age at death, however studies regarding vertebral degeneration and age estimation are lacking. My study follows the work of Stewart (1958) in comparing stages of osteophytic lipping of vertebral bodies to age at death.

I examined the seventh cervical (C7), seventh thoracic (T7), and fourth lumbar (L4) vertebrae in 100 individuals of known ancestry, sex, and age at death from the Hamann-Todd skeletal collection. Degenerative stages and composite scores were analyzed through descriptive statistics and chi …

Neoliberalism, Hegemony And Community Imaginings, Boone W. Shear

Masters Theses

The idea of "community" evokes many long held, positive imaginings. Community implies neighborliness, togetherness, helping each other, tolerance and understanding. Community is set against modem society and is commonly understood to be a solution to the deleterious impacts of capitalism and the state. Although community can be a site of resistance, I am also interested in the ways in which the ideology of community assists in facilitating capitalist inequalities.

The latter part of the twentieth-century saw a significant restructuring of capital in the United States as privatization and deregulation were accompanied by a decline in the welfare state. These efforts …

Examining The Structural Covariates Of Methamphetamine Use: A Social Disorganization Perspective, Justin Smith

Masters Theses

There have been many anecdotal accounts describing the characteristics of individuals involved in methamphetamine use, trafficking and production. However, prior to the current study there was yet to be a macro-level analysis of methamphetamine use. The extant macro-level literature on drug use has suggested that areas with high levels of social disorganization experience high rates of drug use. It was expected that school-districts with low SES and high rates of ethnic heterogeneity, residential instability and family disruption will experience high rates of methamphetamine use. In addition, it was expected that rural school districts would show higher rates than urban and …

Entry Level Therapists’ Perceived Readiness To Prescribe Low-Technology Adaptive Equipment To Geriatric Populations, Russell Wood

Masters Theses

In this research entry-level therapists' were questioned about their readiness to prescribe low-technology adaptive equipment to geriatric populations. The analysis of 33 returned questionnaires have been discussed, with the overall results indicating that experience, familiarity, and education of specific equipment are all significantly related to the confidence levels of entry-level therapists in prescribing those equipment.

Additionally, the results of specific analysis for the groups of equipment, namely dressing, bathing and toileting were entertained. Open ended questions regarding equipment usage, follow up and trends are also discussed. Finally prediction equations are shared resulting from statistical analysis.

Occupational Stress And Slavery: Evidence From Bridgetown, Barbados, Sarah Muno

Masters Theses

In 1996 and 2000, construction workers uncovered unmarked burial grounds in the Pierhead and Fontabelle sections of Bridgetown, Barbados. The human remains were removed in salvage excavation and are now housed at the University of the West Indies and the Barbados Museum and Historical Society. The associated grave goods, documentary record, and initial osteological analysis indicate these individuals were part of the enslaved workforce during the early to mid- eighteenth century. This thesis will explore the presence of vertebral osteophytosis, vertebral anterior wedge compression fractures, vertebral apophyseal facet remodeling and musculoskeletal stress markers among the human remains from Pierhead and …

Coordination Environment: A New Approach To The Sensing Of Lead (Ii) Itself, Kristina Marie Nespechal

Masters Theses

Lead(II) is a silent poison that has plagued society since 3800 B. C. The average intake of lead in the United States alone is 50 μg per day, which is approximately 100-1000 times greater than that of prehistoric lead levels. Regardless of the banning of lead in paints and gasoline, lead poisoning prevails as a major environmental health risk. Science has the ability to address the concern with this environmental contaminant. The future production of an economical and reliable test kit for lead(II) relies on the luminescence of the heavy metal itself.

The absorption and emission spectra for a series …