Digital Commons Network^™

Olivine Ca Content Measured By Icp-Oes To Estimate P-T, Bradley Benavides

Open Access Theses & Dissertations

Ca is a trace element in olivine and its concentration is pressure and temperature dependent, providing a rare opportunity to estimate pressure conditions at which mantle-derived rocks (xenoliths) last equilibrated. This P-T dependence has previously been calibrated for mantle xenoliths, and we applied this technique to samples from Jasper Seamount (Jasper Seamount), an oceanic intraplate volcano (OIV) off the coast of the Baja California Peninsula of Mexico. Preliminary compositions for xenoliths from this location appear to define a magmatic plumbing system that features magma storage near the bottom of the crust. A more detailed analysis of the samples is required …

Reduction Of Onu Buffering For Pon/Vdsl Hybrid Access Networks, Elliott Ivan Gurrola

Open Access Theses & Dissertations

Today's growing internet traffic requires service providers to offer customers faster transmission rates. To keep up with such high transmission rates, service providers need to deploy fiber optical networks. However, due to the high cost involved in deploying the fiber media, this may not prove to be a feasible solution. Instead, service providers can deploy fiber media up to a distribution point, such as a customer's block, and continue the last few hundred feet using the already deployed legacy copper wire media.

In our study we investigate downstream/upstream transmission coordination for passive optical network (PON) / Digital Subscriber Line (DSL) …

Determination Of The Effects Of Zno And Ceo2 Nanoparticles In Mesquite (Prosopis Juliflora) And Soybean (Glycine Max): Synchrotron And Spectroscopic Approaches, Jose Angel Hernandez Viezcas

Open Access Theses & Dissertations

The rapid growth of nanotechnology is exposing the environment to abnormal concentrations of engineered nanoparticles (NPs). There is concern about the unknown consequences of NPs on the environment and human health. This Dissertation has relied significantly on Synchrotron and other spectroscopic techniques to give insights on the effects, speciation and distribution of two metal oxide nanoparticles (ZnO, CeO2) on two plant species (Mesquite and Soybean). We evaluated the effects of ZnO (10 nm) and CeO2 (8 nm) NPs on a plant species native to the semi-arid regions of North America, Mesquite (Prosopis juliflora velutina). Mesquite plants grown in hydroponic culture …

Structural, Optical And Electrical Properties Of Yttrium-Doped Hafnium Oxide Nanocrystalline Thin Films, Abhilash Kongu

Open Access Theses & Dissertations

Hafnium oxide (HfO2) has emerged as the most promising high-k dielectric for Metal-Oxide-Semiconductor (MOS) devices and has been highlighted as the most suitable dielectric materials to replace silicon oxide because of its comprehensive performance. In the present research, yttrium-doped HfO2 (YDH) thin films were fabricated using RF magnetron sputter deposition onto Si (100) and quartz with a variable thickness. Cross-sectional scanning electron microscopy coupled with Filmetrics revealed that film thickness values range from 700 A° to 7500 A°. Electrical properties such as AC Resistivity and current-voltage (I-V) characteristics of YDH films were studied. YDH films that were relatively thin (<1500 A°) crystallized in monoclinic phase while thicker films crystallized in cubic phase. The band gap (Eg) of the films was calculated from the optical measurements. The band gap was found to be ∼5.60 eV for monoclinic while it is ∼6.05 eV for cubic phase of YDH films. Frequency dependence of the electrical resistivity (ρac) and the total conductivity of the films were measured. Resistivity decreased (by three orders of magnitude) with increasing frequency from 100 Hz to 1 MHz, attributed due to the hopping mechanism in YDH films. Whereas, while ρac∼1Ω-m at low frequencies (100 Hz), it decreased to ∼ 104 Ω-cm at higher frequencies (1 MHz). Aluminum (Al) metal electrodes were deposited to fabricate a thin film capacitor with YDH layer as dielectric film thereby employing Al-YDH-Si capacitor structure. The results indicate that the capacitance of the films decrease with increasing film thickness. A detailed analysis of the electrical characteristics of YDH films is presented.

Toward New Data And Information Management Solutions For Data-Intensive Ecological Research, Christine Marie Laney

Open Access Theses & Dissertations

Ecosystem health is deteriorating in many parts of the world due to direct and indirect anthropogenic pressures. Generating accurate, useful, and impactful models of past, current, and future states of ecosystem structure and function is a complex endeavor that often requires vast amounts of data from multiple sources and knowledge from collaborating researchers. Ecological data collection has improved rapidly over the past few decades due to the development, innovation, and large scale deployment of automated sensors, which are capable of measuring a gamut of ecosystem properties over broad spatiotemporal scales. Although complex ecosystem models and analyses are increasingly parameterized with …

The Effects Of Charismatic Leadership And Religion On Decision Making, Brandt A. Smith

Open Access Theses & Dissertations

We examined the effects of leadership and religious priming on decision-making in a resource allocation task involving a decision between funding hydro-fracture mining research and/or solar energy research. We found strong main effects for charismatic v. non-charismatic leadership, and for religious priming v. non-religious priming. Further, we found a significant interaction in that the effects of religious priming on economic decision-making in a resource allocation task was stronger in the non-charismatic condition than in the charismatic condition. Implications of this research and recommendations for future studies are discussed.

Estimating Variations In Locking Depth For The Mojave Segment Of The San Andreas Fault Over The Past 1500 Years From Paleoseismic Stress Drop, Teira Solis

Open Access Theses & Dissertations

The most fundamental model for characterizing earthquake occurrence [Reid, 1910] assumes a constant stress accumulation rate on a locked fault segment, which eventually fails at a threshold stress level. While this model provides a conceptual framework for investigating the conditions that prepare a fault for failure, there is little evidence that faults rupture periodically or at a uniform threshold stress. Moreover, this model fails to explain the large differences in earthquake recurrence intervals and paleoseismic slip for segments of major fault systems: why do some faults rupture on the order of 10's of years, while others require 100's of years …

Political Corruption: Accountability And Party System Institutionalization, Susan Achury

Open Access Theses & Dissertations

Providing a definition built on the agency relationship between voters and public officials, this study presents an institutional approach to the causes of political corruption. I argue that higher levels of political party institutionalization reduce political corruption. Institutionalized political party systems help to overcome collective problems among voters within democracies. By increasing levels of accountability, institutionalized political party systems alter public officials' incentives towards a cleaner exercise of the public power. Focusing on different strategies adopted by political parties, I analyze the effectiveness of the constraints imposed on public officials' corrupt behavior within democracies. On the one hand, institutionalization of …

Determinants Of Condom Use And Hiv Prevention Among East-African Immigrants In Minnesota, Mahamud Ahmed

Open Access Theses & Dissertations

your words

A Systematic Approach To Manage Missing Data In Pavement Management Systems, Mazin M. Al-Zou'bi

Open Access Theses & Dissertations

Pavements are an important part of the highway transportation infrastructure, accounting for the largest share of the overall investment. A tremendous amount of time and money is spent each year on the construction of new pavements, as well as on the maintenance and rehabilitation of existing pavements.

Transportation agencies use pavement management systems (PMS) for their maintenance and rehabilitation planning, programming, and budgeting. PMS are used to make decisions regarding when maintenance and rehabilitation should be applied. The systems also select what type of treatment should be applied for each pavement section in the network with clear estimations of the …

The Investigation Of The Practice Of Frugal Innovation Across Cultures And The Introduction Of An Instructional Model For Streamlining The Design Process, Andres Efren Bolanos

Open Access Theses & Dissertations

The central objectives of this dissertation are to analyze frugal innovation, apply foundational methodologies that contribute to product design, and discover the important contextual information for successful development. This dissertation describes a systematic procedure in designing frugally innovated products. The institutional design will encompass environmental, social, and economic impacts into the entire products' life cycle. Also, a comparison is made between two developing nations' contextual factors to reveal the formulation of frugal innovation.

Comprehensive, Powerful, Academic Database (Cpad): An Evaluative Study Of A Predictive Tool Designed For Elementary School Personnel In Identifying At-Risk Students Through Progress, Curriculum, And Performance Monitoring, Sarah Jo Chavez-Gibson

Open Access Theses & Dissertations

The purpose of this study is to exam in-depth, the Comprehensive, Powerful, Academic Database (CPAD), a data decision-making tool that determines and identifies students at-risk of dropping out of school, and how the CPAD assists administrators and teachers at an elementary campus to monitor progress, curriculum, and performance to improve student skills and academic assessment results. This study provides an in-depth examination and evaluation of the Comprehensive, Powerful, Academic Database (CPAD) as the predictive modeling tool utilized at each of the campuses researched. Predictive modeling tools utilized at various educational institutions throughout the United States, reviewed within the study, facilitate …

Evaluation Of Language Of Intervention On Expressive-Receptive Lexical Skills For Preschool Bilingual Children, Blanca Estela Cisneros

Open Access Theses & Dissertations

The purpose of the study was to evaluate the expressive-receptive lexical skills gained in bilingual preschool children for both their native language (L1) and second language (L2) when provided a bilingual vocabulary intervention and compared to contrasting monolingual and controlled conditions. This group study assessed four treatment conditions: monolingual English intervention, monolingual Spanish intervention, bilingual English-Spanish intervention, and a controlled intervention condition receiving math instruction. English and Spanish expressive and receptive lexical skills were the dependent variables measured at pretest and posttest. After a brief 4 week intervention block, the bilingual group achieved greater gains in Spanish expressive lexical skills …

Examining Articulatory Kinematics Using Diadochokinesis In Concussed And Non-Concussed Individuals, Lindsay Deann Dolan

Open Access Theses & Dissertations

ABSTRACT

Cognitive and communicative deficits associated with traumatic brain injury are an active area of research. However, no research to date has reported on the functionality of motor speech following a concussion. A common tool used to evaluate the motor speech status of potentially impaired individuals is the measurement of the diadochokinetic speech rate. The purpose of this study is to investigate diadochokinetic speech rates in individuals who experience a sports-related concussion. Determining the nature and extent of motor speech involvement post concussion will contribute to the diagnosis, prognosis, and management of recovery. The present investigation will determine; (i) if …

From Plyler To Daca, Policy Guiding Undocumented Students' Rights In A Public Education System And Its Pipeline To Higher Education, L. Guzman-Duvernois

Open Access Theses & Dissertations

This study was designed to provide a guide and understanding of policy, and/or case law pertinent to undocumented students in our school system. The presentation, a non-traditional format, comprised a historical review of case law, statutes, and other legal authority which discuss the legal rights of undocumented students in the United States' public schools. The primary purpose of this study was to increase the reader's understanding of policy related to the undocumented immigrant student population in our American system of education. The secondary purpose was to examine the different aspects of immigration and other policy that have impacted student access …

Attention To Explicit And Implicit Contrast In Verb Learning, Jane B. Childers, Amy Hirshkowitz, Kristin Benavides

Psychology Faculty Research

Contrast information could be useful for verb learning, but few studies have examined children's ability to use this type of information. Contrast may be useful when children are told explicitly that different verbs apply, or when they hear two different verbs in a single context. Three studies examine children's attention to different types of contrast as they learn new verbs. Study 1 shows that 3 ½-year-olds can use both implicit contrast (“I'm meeking it. I'm koobing it.”) and explicit contrast (“I'm meeking it. I'm not meeking it.”) when learning a new verb, while a control group's responses did not differ …

Determinants Of Infant Feeding Practices Of Hiv-Positive And Hiv-Negative Mothers In Pretoria, South Africa, Keith Ellis

Yale School of Nursing Digital Theses

Background: Exclusive breastfeeding (EBF) has been shown to result in lowered risk of postnatal vertical HIV transmission compared to mixed breastfeeding (Mixed BF). Early breastfeeding cessation, or not breastfeeding at all, is associated with an increase in morbidity and mortality amongst both HIV-exposed and HIV-unexposed infants. The South African tradition of giving nutritive and non-nutritive foods to breastfeeding infants in the first few months of life is unique among African nations and warrants closer examination to identify maternal determinants that lead to early mixed feeding practices, commonly used supplemental foods/liquids, the timing of supplemental food introduction, and maternal perceptions of …

Medication Administration In Family Child Care Homes: A Comparison Of State Regulations With National Standards, Katelynn Rei

Yale School of Nursing Digital Theses

The purpose of this cross-sectional study was to compare the 50 state and D.C. family child care home regulations with standards regarding medication administration in Caring for Our Children- National Health and Safety Performance Standards: Guidelines for Out-of-Home Child Care Programs, 3rd edition (CFOC, 2011). A data collection instrument, which included seven CFOC (2011) standards and three CFOC (2011) partial standards on medication administration, was developed by a team of national experts, and used to measure compliance of state regulations with the standards. None of the states' regulations (N=51) met the criteria for all ten standards. Most of the states …

Performance Metrics For Network Intrusion Systems, Christopher John Tucker

School of Engineering, Computing and Mathematics Theses

Intrusion systems have been the subject of considerable research during the past 33 years, since the original work of Anderson. Much has been published attempting to improve their performance using advanced data processing techniques including neural nets, statistical pattern recognition and genetic algorithms. Whilst some significant improvements have been achieved they are often the result of assumptions that are difficult to justify and comparing performance between different research groups is difficult. The thesis develops a new approach to defining performance focussed on comparing intrusion systems and technologies. A new taxonomy is proposed in which the type of output and the …

The Sky Is Falling: Chemical Characterization And Corrosion Evaluation Of Deposition Produced During The Static Testing Of Solid Rocket Motors, William J. Doucette, La S. Mcneill, Scout Mendenhall, Paul V. Hancock, Jason E. Wells, Kevin J. Thackeray, David P. Gosen

Reports

Static tests of horizontally restrained rocket motors at the ATK facility in Promontory UT, USA result in the deposition of entrained soil and fuel combustion products, referred to as Test Fire Soil (TFS), over areas as large as 30–50 mile2 (80–130 km2) and at distances up to 10–12 miles (16–20 km) from the test site. Chloride is the main combustion product generated from the ammonium perchlorate–aluminum based composite propellant. Deposition sampling/characterization and a 6-month field corrosivity study using mild steel coupons were conducted in conjunction with the February 25th 2010 FSM-17 static test. The TFS deposition rates at the three …

Citizen Participation, Trust, And Literacy On Government Legitimacy: The Case Of Environmental Governance, Myung Jin

Journal of Sustainable Social Impact

This paper explores the role of direct citizen participation, trust, and environmental literacy and its impact on the legitimacy of government institutions in the context of environmental governance in the U.S. The current knowledge regarding the dynamics of the institutional legitimacy at the policy level is significantly lacking. This paper addresses broadly the effects of direct citizen participation, citizen trust, and environmental literacy on government legitimacy. Findings indicate that citizens prefer government institutions over ordinary people on leading environmental governance. However, the preference was less clear when asked to choose between the government and businesses as to who should lead …

Automatic Seizure Detection In Rats Using Laplacian Eeg And Verification With Human Seizure Signals, Amal Feltane, G. Faye Boudeaux-Bartels, Walter Besio

Electrical, Computer, and Biomedical Engineering Faculty Publications

Automated detection of seizures is still a challenging problem. This study presents an approach to detect seizure segments in Laplacian electroencephalography (tEEG) recorded from rats using the tripolar concentric ring electrode (TCRE) configuration. Three features, namely, median absolute deviation, approximate entropy, and maximum singular value were calculated and used as inputs into two different classifiers: support vector machines and adaptive boosting. The relative performance of the extracted features on TCRE tEEG was examined. Results are obtained with an overall accuracy between 84.81 and 96.51%. In addition to using TCRE tEEG data, the seizure detection algorithm was also applied to the …

Teacher Participation In School Decision-Making And Job Satisfaction As Correlates Of Organizational Commitment In Senior Schools In Botswana, Paul Alan Mosheti

Dissertations

The Problem. Two major national educational challenges in Botswana are to retain teachers and recruit more. Both retention and recruitment efforts often involve issues of teacher decision-making, teacher job satisfaction, and how these correlate with commitment to the school organization. Little was known about Botswana teachers’ views on these issues. This exploratory study investigated the relationship of teacher participation in decision-making and job satisfaction to organizational commitment among senior secondary school teachers in Botswana.

Methodology. A quantitative research design was used for the study. Two hundred twenty-one completed the questionnaire. Teachers were asked to indicate level of agreement on participation …

Exploring The Relationship Between Adventist Hospital Board Chair Leadership Behaviors And Effectiveness, Anthony M. Stahl

Dissertations

Problem and Purpose. There is a lack of empirical research regarding the leadership behaviors that predict an effective community hospital board chair. Researchers indicate that an effective organization normally has a well-led board. However, the chair role has been largely neglected in the research of board functions and operations. With many hospitals facing reorganization or closing, it is important to understand and identify effective chair behaviors. Thus, the purpose of this study was to determine the relationship between hospital chair leadership behaviors and effectiveness, and the relationship of effective chairs to effective hospitals.

Method. This study used an ex post …

Performance Of Multi-Beacon Dgps, Simon P. Barr, Peter F. Swaszek, Richard J. Hartnett, Gregory W. Johnson

Electrical, Computer, and Biomedical Engineering Faculty Publications

Historically, maritime organizations seeking accurate shipboard positioning have relied upon some form of differential GNSS, such as DGPS, WAAS, or EGNOS, to improve the accuracy and integrity of the GPS. Groundbased augmentation systems, such as DGPS, broadcast corrections to the GPS signal from geographically distributed terrestrial stations, often called beacons. Specifically, pseudorange corrections for the GPS L1 C/A signal are computed at each reference site, then broadcast in the nearby geographic area using a medium frequency (approximately 300 kHz) communications link. The user then adds these corrections onto their measured pseudoranges before implementing a position solution algorithm. Within the United …

Analysis Of L1c Acquisition By Combining Pilot And Data Components Over Multiple Code Periods, Kelly C. Seals, William R. Michalson, Peter F. Swaszek, Richard J. Hartnett

Electrical, Computer, and Biomedical Engineering Faculty Publications

One of the new features of modern GNSS signals is that they generally have a pilot component and data component. A unique aspect of the GPS L1C signal is that it has an unequal power split between the pilot and data components. Various papers have pro- posed channel combining techniques to acquire modern GNSS signals using both components. In this paper, the optimal detector for GPS L1C acquisition over multiple code periods without knowledge of the navigation data or overlay code phase is derived. A variation of semi-coherent integration technique (non- coherently combining the 10 msec coherent combinations) that accounts …

Analysis Of A Simple, Multi-Receiver Gps Spoof Detector, Peter F. Swaszek, Richard J. Hartnett, Matthew V. Kempe, Gregory W. Johnson

Electrical, Computer, and Biomedical Engineering Faculty Publications

GPS spoofing is a hot topic of late; technical discussions vary widely based upon the assumed capabilities and a priori knowledge of the spoofer. For a single GPS receiver, various methods to detect a spoofing event have been proposed in the literature. These range from simple ideas (e.g. monitoring the power levels of the GPS signals) to more complex concepts (e.g. looking for vestigial peaks in the correlator outputs) to the comparison to non- GPS signals (e.g. an IMU). Much of this prior work has been on the conceptual level with limited experimentation; little appears to have been done to …

Relentless Engagement With State Educational Policy Reform: Collaborating To Change The Writing Placement Conversation, Heidi Estrem, Dawn Shepherd, Lloyd Duman

Student Articles, Chapters, Presentations, Learning Objects

This article describes the educational reform efforts surrounding writing placement in one state context. We propose that placement offers a particularly useful engagement point because it is often controlled by state-level policies and it directly impacts the lived experience of first-year college students. To document how we worked across institutions in our state, we describe a series of events that occurred over several years and that fostered collaborative exchanges. Then, we explore the challenges and opportunities afforded by our long-term engagement with policymakers. Ultimately, we propose strategies that writing program administrators might consider as they become engaged with state-level higher …

Machiavelli's People And Shakespeare's Prophet: The Early Modern Afterlife Of Caius Martius Coriolanus, Peter Iver Kaufman

Jepson School of Leadership Studies articles, book chapters and other publications

Both Machiavelli and Shakespeare were drawn to Livy's and Plutarch's stories of the legendary field commander turned political inept, Caius Martius, who was honored with the name Coriolanus after sacking the city of Corioles. The sixteenth-century ‘coriolanists’ are usually paired as advocates of participatory regimes and said to have used Coriolanus's virulent opposition to power-sharing in early republican Rome as an occasion to put plebeian interests in a favorable light. This article objects to that characterization, distinguishing Machiavelli's deployment of Coriolanus in his Principe and Discorsi from Shakespeare's depiction of Coriolanus and his critics on stage. The essay that follows …

The Impact Of Fear Of Falling On Functional Independence, Katherine Aileen Lawson

Open Access Theses & Dissertations

ABSTRACT

Falls are the fifth leading cause of death for persons over the age of 55 (CDC, 2010). However, not all falls result in death. In 2006, 10.5% or 2.1 million visits to the emergency room were the result of older adults falling. Non-fatal falls have long-term effects that impact a person's well-being physically, financially, and emotionally. It is estimated that health care costs of non-fatal falls is expected to reach $54.9 billion by 2020 (Englander, Hodson & Terregrossa, 1996). Intrinsic and extrinsic fall risk factors have been identified for persons over the age of 65. Intrinsic fall risk factors …