Digital Commons Network^™

Remote Sensing Solutions For Estimating Runoff And Recharge In Arid Environments, Adam M. Milewski

Dissertations

Efforts to understand and to quantify the interplay between precipitation, runoff, and recharge are often hampered by the paucity of appropriate monitoring systems. We developed methodologies for rainfall-runoff and groundwater recharge computations that heavily rely on observations extracted from a wide-range of global remote sensing data sets (TRMM, SSM/I, AVHRR, and AMSR-E,) using the arid Sinai Peninsula (SP; area: 61,000 km²) and the Eastern Desert (ED; area: 220,000 km²) of Egypt as our test sites. A two-fold exercise was conducted. Temporal remote sensing data (TRMM, AVHRR and AMSR-E) were extracted from global data sets over the …

The Impact Of Telemonitoring On Self-Efficacy, Emotional Well-Being, And Clinical Outcomes In Patients With Chronic Obstructive Pulmonary Disease Or Heart Failure, Jaclyn West-Frasier

Dissertations

Telemonitoring is the remote monitoring of patients' health status using telecommunications and information processing technologies. This pilot study analyzed data collected through a parent study that randomized 46 home health patients to either standard care (SC) or standard care with the addition of telemonitoring (TM). The telemonitoring device used in this study provided daily transmission of physiologic data and patients responses to questions about their disease and symptom management. Data analysis was completed to address the question whether telemonitoring, as part of standard home care for patients with chronic obstructive pulmonary disease (COPD) and patients with heart failure (HF), has …

Exploration Of The Chemical And Biological Processes Through Molecular Dynamics Simulation And Blocklocalized Wavefunction Method, Yuchun Lin

Dissertations

Computer simulation plays a crucial role in interpreting, unifying and guiding experimental observations. In this dissertation, molecular dynamics (MD) simulations and the block-localized wavefunction (BLW) method have been used to explore the chemical and biological processes.

Detailed MD simulations were performed to study the transportation of NH₄⁺, NH₃ and H₂O through the Escherichia coli ammonium transporter (AmtB) membrane protein. A periplasmic recruitment vestibule was identified and the entrance of an NH₄⁺ into this vestibule requires only 3.1 kcal/mol. In the end of this vestibule, the phenyl ring of Phe107 dynamically opens and …

A Comparison Of Three Training Methods On The Acquisition And Retention Of Automotive Product Knowledge, Rhiannon M. Fante

Dissertations

The purpose of this study was to compare the effects of a traditional (non-fluency) web-based training program with and without study objectives with a web-based fluency-building training program on the acquisition and retention of automotive product knowledge. The effects of the training conditions were assessed by how accurately and quickly participants responded on a product knowledge test immediately after training, four weeks after training, and eight weeks after training. A three-group between subjects design was used with 20 college students in each group. Results indicated that participants in the fluency training group were more accurate and fluent immediately after training, …

A Qualitative Study Of Buddhist Informed Psychotherapists, Michael Sean Harris

Dissertations

The field of psychology has a history of distancing itself, if not outright dismissing, both religion and spirituality. In recent years, however, psychology has come to move more toward an embrace of religious and spiritual experience. Buddhism, often expressed as a philosophical system without regard to theistic or nontheistic underpinnings, has been integrated with psychological theory in recent scholarly literature. This dissertation is an exploratory study regarding howBuddhist psychological perspectives are applied in actual psychotherapeutic practice. A participant pool of ten psychotherapists who self-identified as utilizing Buddhism in their work was studied along a variety of dimensions. Demographic questionnaires, audiotaped …

Disruptive Effects Of Aβ Oligomers To The Radial-Arm Maze Performance Of Rats, Kineta Lynn Morgan-Paisley

Dissertations

Converging lines of research have implicated a causal relationship between oligomers of amyloid-β and the cognitive impairments associated with Alzheimer's disease (AD); however, very few studies have provided direct experimental evidence of this relationship and none of those studies have used an established model of working memory. The present study used an established model of working memory, the radial-arm maze, to examine the effects of amyloid-β oligomers on the memory of two groups of rats. The experimental group received ICV injections of the culture media (CM) of Chinese Hamster Ovary (CHO) cells transfected with a human mutation of APP containing …

The Effect Of Substrate Properties On Print Attributes For Gravure Printing - From Proof To Press, Yu Ju Wu

Dissertations

Gravure is the major printing process used for publication printing. In gravure printing processes, color proofing is for the purpose of checking the color to ensure that it is as desired. There is no doubt that paper properties have significant effects on the image reproduction for either printing or proofing processes. In order to achieve uniformity of printing and obtain good color reproduction performance, it is important that the all paper properties are well defined and controlled. This study investigates the correlations between paper properties and print quality/color reproduction for gravure publication printing and ink jet printing used in digital …

Mindfulness In Childbirth: An Investigation Of The Effects Of Mindfulness Training On Maternal Satisfaction With Childbirth And Obstetric Outcomes, Brenda L. Bratton

Dissertations

This study investigated the effects of mindfulness training on obstetric outcomes and maternal satisfaction with childbirth. We were interested in whether mindfulness training was more effective than a control group receiving psychoeducation on stress reduction. The goal of the intervention group was to increase participants' moment-to-moment awareness of thoughts, feelings, and body sensations during childbirth so that they would respond to these experiences rather than react to them in an automatic manner. These strategies were hypothesized to help a laboring woman minimize fear or anxiety associated with pain and complications and be more adaptive to whatever circumstances arose. Repeated measures …

Intimacy, Elizabeth Knapp

Dissertations

In one of his finest poems, "Asphodel, That Greeny Flower," William Carlos Williams writes: "It is difficult / to get the news from poems / but men die miserably everyday / for lack / of what is found there." Earlier, his contemporary, W.H. Auden, had made his famous claim that "poetry makes nothing happen." While the views of the two great modernists appear to be at odds with each other, they are in fact two sides of the same argument, the yin and yang at the center of all true art. For what these poets saw as critical to both …

Synthesis, Characterization, And Catalytic Application Of Gold Nanoparticles, Junhyung Kim

Dissertations

Properties of nanometer-sized gold(Au) particles, especially those that are protected by a monolayer coating of thiolate ligands, called 'Monolayer Protected Clusters' (MPCs), are of rigorous multidisciplinary interest for their potential applications in catalysis and electronics due to their variation with size.

In larger core diameter sizes (>1.5nm) AuMPCs show metallic behavior as observed from electrochemical measurements. On the other hand, sub-nanometer ([approximate]1.1nm) AuMPCs exhibit molecule-like electronic behavior which is typical of Au38 nanoparticles. The various alkane chain thiols(C4 S-C12 S) capped Au38 MPCs have been examined with independent analytical tools, producing a remarkably consistent picture of these materials.

The …

Collective Bargaining In Public Schools: Superintendents' Perspective, Kyle W. Mayer

Dissertations

The purpose of this study was to explore how selected superintendents are experiencing the collective bargaining process. Exploration included an examination of the various roles that selected superintendents have played in the collective bargaining process within rural and suburban school districts in Michigan.

Furthermore, exploration included thematic areas of greatest challenges facing superintendents in recent collective bargaining negotiations. Particular emphasis was given to the style of collective bargaining environment that superintendents reported as most conducive to successful contract negotiations. In addition, the rising cost of health care benefits was a significant point of emphasis within this study.

Twenty-six superintendents from …

Between The City And The Bush: Suburbia In The Contemporary Australian Novel, Nathanael David O'Reilly

Dissertations

Australia's most important national narratives take place in the bush, the outback, and overseas. The dominant representations of Australia, both within the nation and abroad, focus on the outback, the bush and the cities. However, Australia is one of the most suburban societies in the world, and has been since the mid-nineteenth-century. Nevertheless, Australian novels are rarely set in suburbia. Between the City and the Bush examines representations of suburbia in contemporary Australian novels. Focusing on the relationship between colonialism, the physical development of suburbia and the anti-suburban intellectual tradition, my chapters address a number of issues, including immigration, environmental …

Self-Solicited Feedback: Effects Of Hourly Pay And Individual Monetary Incentive Pay, Julie M. Slowiak

Dissertations

The frequency of feedback solicitation under hourly pay and individual monetary incentive pay conditions was examined. A two-group between-subjects design was used with 30 college students in each group. Participants attended three experimental sessions and entered the cash value of simulated bank checks presented on a computer screen. Results indicated that (a) participants who were paid individual monetary incentives did not self-solicit feedback more often than those who were paid an hourly wage, (b) feedback solicitation was not related to individual differences in levels of competition with one's self or competition with others, (c) task performance was higher for individuals …

Differences By Degrees: Providing Services To Adult Students Based On Degree Level Pursued, Kathy L. Rix

Dissertations

This study examined the perception of adult students pursuing different degree levels (bachelor, master, doctoral) to determine if there are differences in their needs for support services. A two-part, mixed methods design was used, consisting of an online survey and follow-up interviews with a small subset (13) of the survey respondents.

A survey instrument was developed with 44 dependent variables covering services, as determined from the literature, that could be most important to adult students. The online survey was distributed to 2,029 adult students at a Midwestern, doctoral, research intensive university. Criteria for selection as part of the population required …

Online Teaching Self-Efficacy Of Nurse Faculty Teaching In Public, Accredited Nursing Programs In The State Of Michigan, Kristi Adair Robinia

Dissertations

Nurse educators are being challenged to adapt to rapidly changing educational and health care environments. Higher education is under pressure to facilitate more web-based learning courses to reach wider markets of students. Nurse faculties are also being pressured to incorporate more technology into theory courses as a possible solution to a looming nation-wide nurse and nurse faculty shortage. Some faculty have enthusiastically embraced the new technology behind online teaching, while others remain concerned about online teaching effectiveness and course quality.

The purpose of this study was to examine variables that affect nurse faculty self-efficacy levels and participation in online teaching. …

The Role Of Short Term Synamptic Plasticity In Temporal Coding Of Neuronal Networks, Lakshmi Chandrasekaran

Dissertations

Short term synaptic plasticity is a phenomenon which is commonly found in the central nervous system. It could contribute to functions of signal processing namely, temporal integration and coincidence detection by modulating the input synaptic strength. This dissertation has two parts. First we study the effects of short term synaptic plasticity in enhancing coincidence detecting ability of neurons in the avian auditory brainstem. Coincidence detection means a target neuron has a higher firing rate when it receives simultaneous inputs from different neurons as opposed to inputs with large phase delays. This property is used by birds in sound localization. When …

Projecting Land Use Changes Using Parcel-Level Data : Model Development And Application To Hunterdon County, New Jersey, Florencio C. Ballesteros Jr.

Dissertations

This dissertation is to develop a parcel-based spatial land use change prediction model by coupling various machine learning and interpretation algorithms such as cellular automata (CA) and decision tree (DT). CA is a collection of cells that evolves through a number of discrete time steps according to a set of transition rules based on the state of each cell and the characteristics of its neighboring cells. DT is a data mining and machine learning tool that extracts the patterns of decision process from observed cell behaviors and their affecting factors. In this dissertation, CA is used to predict the future …

Density Relaxation Of Granular Matter Through Monte Carlo And Granular Dynamics Simulations, Oleksandr M. Dybenko

Dissertations

Granular materials are the principal ingredients of the industrial complex involved with the handling and processing of bulk solids including pharmaceuticals, chemicals, agricultural and mining materials. Despite the enormous importance of these materials in society, their behavior is not well-understood; in fact, there is no known model available that is capable of predicting the wide range of phenomenon that have been observed. One of the most important of these is known as density relaxation. Here, a granular material undergoes an increase in solids fraction as a result of the application of discrete taps or continuous vibrations.

In this dissertation, the …

Roles Of Gap Junctions In Neuronal Networks, Joon Ha

Dissertations

This dissertation studies the roles of gap junctions in the dynamics of neuronal networks in three distinct problems. First, we study the circumstances under which a network of excitable cells coupled by gap junctions exhibits sustained activity. We investigate how network connectivity and refractory length affect the sustainment of activity in an abstract network. Second, we build a mathematical model for gap junctionally coupled cables to understand the voltage response along the cables as a function of cable diameter. For the coupled cables, as cable diameter increases, the electrotonic distance decreases, which cause the voltage to attenuate less, but the …

Synthesis And Characterization Of Plasma Enhanced Chemically Vapor Deposited Tantalum Films, Weizhong Chen

Dissertations

A low temperature inorganic plasma-enhanced chemical vapor deposition (PECVD) process has been developed for the growth of Ta using tantalum pentachloride (TaC15) as the preferred precursor and hydrogen as the reactant gas. Ta coatings were deposited at substrate temperature of 370-400 °C, reactor working pressures of 0.7-2 Ton, hydrogen carrier flow rate of 10-20 sccm, hydrogen reactant flow rates of 500 sccm, and plasma power ranging from 60 to 100W. Ta coatings were characterized with respect to their chemical, structural, and morphological properties by Auger electron spectroscopy (AES), x-ray diffraction (XRD), atomic force microscopy (AFM), x-ray photoelectron spectroscopy (XPS), scanning …

Appropriation Of Privacy Management Within Social Networking Sites, Catherine Dwyer

Dissertations

Social networking sites have emerged as one of the most widely used types of interactive systems, with memberships numbering in the hundreds of millions around the globe. By providing tools for their members to manage an ever-changing set of relationships, social networking sites push a constant expansion of social boundaries. These sites place less emphasis on tools that limit social boundaries to enable privacy.

The rapid expansion of online social boundaries has caused privacy shockwaves. Privacy offline is enabled by constraints of time and space. Online, powerful search engines and long term digital storage means private data have no expiration …

Instabilities Of Volatile Films And Drops, Nebojsa Murisic

Dissertations

We report on instabilities during spreading of volatile liquids, with emphasis on the novel instability observed when isopropyl alcohol (IPA) is deposited on a monocrystalline silicon (Si) wafer. This instability is characterized by emission of drops ahead of the expanding front, with each drop followed by smaller, satellite droplets, forming the structures which we nickname “octopi” due to their appearance. A less volatile liquid, or a substrate of larger heat conductivity, suppress this instability. In addition, we examine the spreading of drops of water (DJW)-JPA mixtures on both Si wafers and plain glass slides, and describe the variety of contact …

Signal Transmission In Epithelial Layers, Filippo Posta

Dissertations

Cell signaling is at the basis of many biological processes such as development, tissue repair, and homeostasis. It can be carried out by different mechanisms. Here we are focusing on ligand mediated cell-to-cell signaling in which a molecule (ligand) is free to move into the extra-cellular medium. On the cell layer surface, it can bind to its molecule-specific receptors located on the cell plasma membrane. This mechanism is the subject of many experimental and theoretical studies on many model biological systems, such as the follicular epithelium of the Drosophila egg, which motivates this work.

Here, we present a general mathematical …

Data Allocation In Disk Arrays With Multiple Raid Levels, Jun Xu

Dissertations

There has been an explosion in the amount of generated data, which has to be stored reliably because it is not easily reproducible. Some datasets require frequent read and write access. like online transaction processing applications. Others just need to be stored safely and read once in a while, as in data mining. This different access requirements can be solved by using the RAID (redundant array of inexpensive disks) paradigm. i.e., RAIDi for the first situation and RAID5 for the second situation. Furthermore rather than providing two disk arrays with RAID 1 and RAID5 capabilities, a controller can be postulated …

Production Of Nanocrystalline Rdx By Ress : Development And Material Characterization, Victor Stepanov

Dissertations

The aim of the present work was to address the hazardous vulnerability of energetic materials to accidental initiation. An improved form of the explosive RDX with a significantly reduced sensitivity to stimuli including shock and impact was sought. The direction of this research was to investigate the effect of RDX crystal size reduction down to nano-scale dimensions on the sensitivity characteristics. Although size reduction of energetic crystals has been demonstrated often to result in a sensitivity reduction, the effect at the nano-scale particle size has not been investigated.

To generate nanocrystalline RDX a recrystallization process was developed based on rapid …

Optimal Allocation Of Blood Products, Godson A. Tetteh

Dissertations

The high cost of collection and the short shelf life of apheresis platelets demand efficient inventory management to reduce outdates and shortages. Apheresis platelets are licensed for seven days, and blood centers are keen on knowing the consequences of various product collection and distribution strategies. To reduce outdates, inventory managers typically distribute the older units first, thereby following first-in first-out (FIFO) policy; however, hospital blood banks would prefer that the blood center issues out the freshest units first, equivalent to a last-in first-out (LIFO) policy. This study addresses the optimal distribution policy to achieve a desired outdate, shortage and average …

Optical Properties And Carrier Transport In Si/ Si1-Xgex Nanostructures, Eun Kyu Lee

Dissertations

Defect-free epitaxial growth of Ge on a ~4 % lattice-mismatched single-crystal Si substrate is achieved using reduced dimension nanoscale heterostructures, where efficient structural relaxation might occur due to an enhanced adatom migrations and high surface-to-volume ratio. For development of novel electronic or optical devices based on these novel structures, understanding of their electrical and optical properties is crucial. This study explores the optical properties and carrier transport in two different types of Si/Si _1-xGe _xnanostructures: Ge nanowires (NWs) forming nanoscale heterojunctions with Si substrates and multilayers of SiGe clusters embedded into a Si matrix.

Micron-long Ge nanowires grown …

Micro, Meso And Macro Materials Processing Using High-Speed Liquid Projectiles, Veljko Samardzic

Dissertations

The objective of this research is developmentof aknowledge base of materials processing by the impact of high-speed liquid projectiles. The work involved experimental study of generation and applications of high-speed liquid projectiles. The projectiles were generated by the launchers, which used gunpowder as an energy source. The experiments were carried out at the low (O.35g of the powder), middle (1.2g) and high (10g to 70g) levels of energy consumptions and at several different launchers modification.

Experimental investigation of effect of gun powder mass on energy of projectile was conducted for ductile and brittle targets. An array of experimental …

Dynamics Of Online Chat, Mihai Moldovan

Dissertations

Millions of people use online synchronous chat networks on a daily basis for work, play and education. Despite their widespread use, little is known about their user dynamics. For example, one does not know how many users are typically co-present and actively engaged in public interaction in the individual chat rooms of any of the numerous public Internet Relay Chat (IRC) networks found on the Internet; or what are the factors that constrain the boundaries of user activity inside those chat rooms. Failure to collect and present such data means there is a lack of a good understanding of the …

Perception Gaps And The Adoption Of Information Technology In The Clinical Healthcare Environment, Karen Hare

Dissertations

Implementation of information systems has lagged in many areas of clinical healthcare for a variety of reasons. Economics, data complexity and resistance are among the often quoted roadblocks. Research suggests that physicians play a major part in the adoption, use and diffusion of information technology (IT) in clinical settings. There are also other healthcare professionals, clinical and non-clinical, who play important roles in making decisions about the acquisition of information technology. In addition to these groups there are information technology professionals providing the services required within the healthcare field. Finally within this group are those IT professionals who have sufficient …