Digital Commons Network^™

Characterizing The Evolution Of Operating Systems, Yi Peng

Dissertations

Examining the development and trends in software engineering technology is a huge undertaking. It is constantly evolving and affected by a large number of factors, which are themselves driven by a wide range of sub-factors. This dissertation is part of a long term project intended to analyze software engineering technology trends and how they evolve. This project is intended to analyze operating system trends and what are the factors that drive how they evolve. Basically, the following questions will be answered: "How to watch, predict, adapt to, and affect operating system's evolution trends?"

In previous research, YF Chen used statistical …

Uniaxial And Triaxial Behavior Of High Strength Concrete With And Without Steel Fibers, Xiaobin Lu

Dissertations

This study first presents an extensive experimental research program on the true uniaxial and triaxial compression behavior for both high strength concrete (HSC) and steel fiber reinforced high strength concrete (SFHSC). The experimental study mainly focuses on the octahedral shear stress strain relationship of those two types of concrete, which is adopted as the basis to develop a new incremental constitutive model. Emphasis is also put on the investigation of the variation of tangent Poisson's ratio under not only uniaxial but also triaxial stress conditions. The effect of cyclic loading on this parameter is also addressed.

According to this research, …

Computational Studies Of Viscoelastic Multiphase Flows, Shriram B. Pillapakkam

Dissertations

A finite element code based on the level set method is developed for performing two and three dimensional direct numerical simulations (DNS) of viscoelastic two-phase flow problems. The Oldroyd-B constitutive equation is used to model the viscoelastic liquid. The code is used to study transient and steady state shapes of Newtonian and viscoelastic drops in simple shear and buoyancy driven flows. The roles of the governing dimensionless parameters: Capillary number (Ca), Deborah Number (De) and the polymer concentration parameter c, in determining deformation of drops and bubbles, are also analyzed.

The numerical code permits us to vary Ca, De and …

Development And Application Of Fractionation Procedure For Drinking Water Organic Matters, Yong Pu

Dissertations

USEPA mandates a control of disinfection by-products (DBPs) in finished drinking water and recommends reduction of natural organic matters (NOM), DBP precursors, to achieve this regulatory goal. Studies relating NOM with DBP include fractionation of water samples, characterization of collected organic fractions, fractions' formation potential tests, and jar or similar tests to remove NOM. This study discussed a current resin fractionation procedure on principle, procedure, and its efficiency when applied to water samples of low NOM (< 5mgIL). The primary objective of this research is to develop a fractionation procedure intended for water of low NOM by carefully applying mass balance concept through each fraction's fractionation and a selection of stable ion exchange resins. A new protocol was presented with triple columns of XAD-8 adsorption resin, one column of AG-MP-50 cationic resin, and another column of WA 10 weak anionic resin in sequence. This protocol was experimented and confirmed for its efficiency (±10% loss of mass) with samples from Canal Road (CR) and Raritan Millstone (RM) surface water treatment plants (WTPs) in central New Jersey. The second objective of this study is to develop a statistical model with a potential of online delineation of organic fractions of NOM. The resulting model based on samples of Passaic Valley Water Commission (PVWC) WTP in northern New Jersey was applied to predict organic fractions of samples from CR and RM plants. Paired T-test (paired t ratio 1.15 < t critical 2.02) indicated a good correlation between the predicted and actual fraction concentration. Finally, samples of Middlesex Water Company (MWC) were fractionated and Trihalomethane formation potential tests (THMFP) on collected fraction showed hydrophilic matters possessed a higher potential to produce TTHM in finished water than hydrophobic matter. Jar tests indicated while coagulation was effective in removing hydrophobic matter, it may not be optimum for removal of hydrophilic matter.

This study developed an accurate fractionation procedure for low NOM waters. It provided a better understanding of organic matter transformation at different treatment …

Live, Virtual, And Constructive Environments For Performance Support, John Michael Lacontora

Dissertations

As military systems become more complex, the operation and support of these systems becomes intrinsically more difficult. The U.S. Army's current procurement process relies on industry to provide embedded training and performance support tools for the systems they produce. These tools are relatively new and in the early stages of development. As yet, they have failed to meet the needs of the technicians that are required to support these complex systems. Current efforts to provide enabling technologies that enhance the capabilities of automotive maintenance technicians are concentrated in three professional communities. First is the Performance Improvement community where work is …

Pattern Discovery In Structural Databases With Applications To Bioinformatics, Sen Zhang

Dissertations

Frequent structure mining (FSM) aims to discover and extract patterns frequently occurring in structural data such as trees and graphs. FSM finds many applications in bioinformatics, XML processing, Web log analysis, and so on. In this thesis, two new FSM techniques are proposed for finding patterns in unordered labeled trees. Such trees can be used to model evolutionary histories of different species, among others.

The first FSM technique finds cousin pairs in the trees. A cousin pair is a pair of nodes sharing the same parent, the same grandparent, or the same great-grandparent, etc. Given a tree T, our …

Tide-Influenced Contaminant Transport In Coastal Aquifers, Yong Peng

Dissertations

Coastal aquifers are distinguished from other aquifers because of tidal effects which cause complicated groundwater flow and contaminant transport phenomena in regions immediately adjacent to the coast. This study is designed to address the significance of tidal influence on contaminant transport by focusing on one-dimensional homogeneous coastal aquifers.

This study formulates a conceptual model and corresponding flow and transport equations, analyzes coastal boundary conditions, solves numerically the transport equation, and uses experiments to verify the numerical results.

Results of numerical and experimental studies conclude that tides can have a significant impact on contaminant transport, especially when under unconfined conditions, subject …

The Testing Of Semiconductor-Based Adsorption Modified Photosensitive Sensors For Their Response To A Volatile Organic Compound, Oxygen, Humidity, And Heating, Roberta Rosty

Dissertations

Two thin-film sensors, composed of different thicknesses (approximately 0.5 microns and 4.5 microns) of a cadmium sulfide layer coated with Rhodamine B fluorescent dye on a glass substrate, were tested for change in photoconductivity due to exposure to different concentrations of gaseous organic molecules in the parts-per-million (ppm) range.

It was theorized that the gaseous organic molecules would adsorb to the dyed semiconductor surface and that some energy would be transferred to the adsorbed analyte rather than to the cadmium sulfide semiconductor layer through the dye, thereby decreasing the photoconductivity of the surface in an amount proportional to the analyte …

Crystalization Studies In Hollow Fiber Devices, Dimitrios Zarkadas

Dissertations

Crystallization was examined under a new perspective and in a flow environment much different from that available in currently used industrial devices. Three crystallization techniques were tested in the unique flow environment offered by hollow fiber devices. In addition, a new type of heat exchanger based on hollow fibers was tested as well as the potential use of porous hollow fiber devices as mixing devices. Hollow fiber devices are compact, extremely efficient on a volumetric basis, easy to scale up and control and their inherent characteristics promote the creation of homogeneous temperature and concentration conditions on a scale considerably smaller …

Investigation Of Static And Dynamic Enhancement Of Laminar Natural Convection Cooling Of Electronics, Laurie Ann Florio

Dissertations

With the proliferation of consumer electronics devices and the increasingly demanding thermal control requirements for such devices, more effective and efficient means of cooling electronics are needed. The feasibility of three alternative approaches to enhancing pure natural convection cooling of electronics is investigated in the current research. The three static or dynamic methods investigated are alternate cross-flow passages, the strategic placement of transversely oscillating plates near the heat sources and a combined method using both the cross-flow passages and the strategically placed oscillating plates. These cooling methods are intended to operate in the regime for which natural convection cooling is …

In Vitro Drug Delivery Based On A Porous Membrane-Based Aqueous-Organic Partitioning System And Its Enhancements Through Mouse Skin, Qiuxi Fan

Dissertations

Novel approaches for transdermal drug delivery (TDD) based on a porous membrane-based aqueous-organic partitioning system have been investigated and successful deliveries were observed. Doxycycline hydrochloride (HCl), a polar antibiotic drug with a relatively large molecule weight (MW: 480.1) was studied as a basic model agent. Its controlled release using this technique was studied first. Satisfactory release profiles demonstrate the practical potential of such a system to achieve useful controlled release rates. The enhancer linoleic acid was essential to successful release using a mouse skin beneath a porous polymeric membrane. The transport rates of smaller molecules e.g., caffeine and nicotine from …

Scattering Matrix Analysis Of Photonic Crystals, Valeriy Lukyanov

Dissertations

Using a scattering matrix approach we analyze and study the scattering and transmission of waves through a two-dimensional photonic crystal which consists of a periodic array of parallel rods with circular cross sections. Without making any assumptions about normal incidence, single mode propagation, and sufficient inter-scatter separation in the direction of propagation, we show how to compute the transmission and reflection coefficients of these periodic structures. The method is based on the computation of a generalized scattering matrix for one column of the periodic structure.

We also develop an analytical method to analyze and to study the scattering and transmission …

Qos Constrained Cellular Ad Hoc Augmented Networks, Chi-Tung Chen

Dissertations

In this dissertation, based on different design criteria, three novel quality of service (QoS) constrained cellular ad hoc augmented network (CAHAN) architectures are proposed for next generation wireless networks. The CAHAN architectures have a hybrid architecture, in which each MT of CDMA cellular networks has ad hoc communication capability. The CAHAN architectures are an evolutionary approach to conventional cellular networks. The proposed architectures have good system scalability and high system reliability.

The first proposed architecture is the QoS constrained minimum-power cellular ad hoc augmented network architecture (QCMP CAHAN). The QCMP CAHAN can find the optimal minimum-power routes under the QoS …

An Optic Fiber Sensor For Partial Discharge Acoustic Detection, Xiaodong Wang

Dissertations

Partial discharge (PD) is a very common problem in operating power transformers and is one of the factors that could lead to failure of power transformers, leading to power outage and expensive repairs. The acoustic wave induced by PD can be measured and used for monitoring, diagnosing, and locating potential failures in power transformers.

The effects of the temperature of the transformer and transformer oil are one of the very important parameters in PD and these effects are investigated in detail. The Fast Fourier Transform (FF1') is used to synthesize the measured data and results show that for periodic PD …

The Transition From High School To College : A Single-Case Study, Margaret R. Hay

Dissertations

Purpose. The purpose of this study was to use quantitative and qualitative data to describe the transition recent high-school graduates made to a small, rural community college. Both the students’ academic preparation and their own perceptions about their preparedness for college were described.

Method. Data from the transcripts of high-school graduates were examined using Chi square, tests of independent means, and analyses of variance to test the relationship to placement in developmental classes. The data included senior year course selections, the number of units taken in math, English, and textbook-dependent courses, and grade point averages in math, English, and textbook-dependent …

Developmental Processes Critical To The Formation Of Servant Leaders In China, Thomas William Horn

Dissertations

Problem. This study concerns three matters: the leader formation process in general, servant leadership formation in particular, and the application to crossing cultures, with China as the primary context. The central problem of this study revolves around leader formation . What events, experiences, people and other formative processes contributed as critical to the formation of exemplary Christian leaders in China?

Method. The design of this research was a narrative, qualitative study that explored the central phenomenon of leader formation. The researcher was the instrument to collect data through in-depth interviews. This study purposefully selected three exemplary Christian Chinese leaders. The …

Narratives Of Adolescent Students: The Integration Of Health And Learning Through Application Of Nursing Theory, Marjean Huber

Dissertations

Problem. There are few resources to show educators how to help students improve learning by improving health and mental well-being. There is a lack of integration in the literature in terms of how practitioners can reach these students in order to help them learn effectively and develop into successful, productive adults with meaningful lives. This study has three major sections. First, I examine my experiences within education to determine what values, truths, and principles mold my practice. Second, I identify my teaching practice in relationship to nursing theory integrating it with learning theory, thus highlighting the relationship between the health …

Demographic Characteristics And Academic Measures As Predictors Of Success On The American Society For Clinical Pathology (Ascp) Medical Technologist Certification Examination, Marcia Ann Kilsby

Dissertations

Purpose. This study was undertaken to address the utility of demographic characteristics and academic measures as predictors of success for the American Society for Clinical Pathology Board of Registry Medical Technologist Certification Examination (Certification Examination) Total Score and six Subscores and to find predictive models with relevance to an ethnically and racially-diverse student population.

Method. The research population was the graduates of the Andrews University Program for Clinical Laboratory Sciences. The 233 subjects were from 53 different birth countries. The relationships between Certification Examination scores and both demographic characteristics and academic measures were analyzed by chi square, analysis o f …

Intuitive Decision Making And Leadership Style Among Healthcare Executives In The United States, Cherie Whiting

Dissertations

The purpose of this two-phased, sequential, exploratory, mixed-methods study was to survey a sample of Fellows in the American College of Healthcare Executives in the United States and then interview selected individuals who scored in the highly intuitive category on the intuition survey to explore how they made intuitive decisions. In the first phase, quantitative research questions addressed the relationship between leadership style and the potential to make intuitive decisions, as well as the relationship and interaction between the potential to make intuitive decisions and age, gender, and size of company. In the second phase, qualitative interviews were used to …

Theology Of Judgment In Genesis 6-9, Chun Sik Park

Dissertations

The present dissertation seeks to develop a theology of judgment in Gen 6-9. Following an introductory chapter, the second chapter is devoted to analyzing the three main extrabiblical ANE flood stories (the Eridu Genesis, the Atra-Hasis Epic, and the Gilgamesh Epic) from the four aspects of judgment: date, cause and purpose, extent, and procedure. The analysis of those stories reveals that the ANE flood was a historical and local (global dimension is implied) event without moral cause, and that the judgment of the deities had a procedure of investigation, sentence, execution, and mitigation. The third chapter treats the theology of …

The Heavenly Sanctuary/Temple Motif In The Hebrew Bible : Function And Relationship To The Earthly Counterparts, Elias Brasil De Souza

Dissertations

The present dissertation investigates the function of the heavenly sanctuary/temple and its relationship to the earthly counterparts, as reflected in forty-three passages of Hebrew Bible.

Following an introductory chapter, the second chapter of this dissertation is devoted to a survey of the heavenly sanctuary/temple motif in the ANE literature, as represented by Sumerian, Akkadian, Hittite, Ugaritic, and Egyptian texts. The investigation of these texts reveals that the heavenly sanctuary/temple motif was part of the worldview of the ANE, where the heavenly sanctuary was not only assumed as existing in heaven, but also as functioning in close relationship to the earthly …

A Critique Of The Urban Mission Of The Church In The Light Of An Emerging Postmodern Condition, Kleber De Oliveira Goncalves

Dissertations

The world is becoming an urban society. The urban expansion witnessed during the twentieth century and continuing into the twenty-first century is unprecedented in the history of the human civilization. Simultaneously, the Western world faces the paradigm shift from the modern era to a postmodern condition. Both movements have remarkable implications for the mission of the church in urbanized, postmodernizing societies. Shaped by the modern worldview, the church is now further ostracized by the postmodern condition.

While the literature of urban mission has grown in the past few years, very little consideration has been given to the particular issues and …

Reactions To The Seventh-Day Adventist Evangelical Conferences And Questions On Doctrine 1955-1971, Juhyeok Nam

Dissertations

Topic

The Seventh-day Adventist Evangelical Conferences of 1955-1956 resulted in the publication of articles favorable to Adventists in Eternity and Seventh-day Adventists Answer Questions on Doctrine, both of which evoked a variety of reactions among evangelicals and Adventists.

Purpose

This study identifies and analyzes various evangelical and Adventist responses to the Seventh-day Adventist Evangelical Conferences and Questions on Doctrine. In particular, this investigation examines the interaction between the major theological camps that emerged within and outside the Adventist church.

Sources

This research is a documentary/analytical study of materials produced between 1955 and 1971 in reaction to the Seventh-day Adventist …

The Student Missionary Experience And Its Impact On Young Adults, Troy Fitzgerald

Dissertations

Problem. While reputed to be valuable, the Student Missionary (SM) experience has not been studied to ascertain how a year of service impacts the college students who serve. Furthermore, there are no studies that show what aspects of the SM experience make a year of service transformational. Most of what is known about a year of service is anecdotal and begs for systematic study of the SM experience.

Method. This is primarily a qualitative study where former SMs from four Adventist colleges and universities were interviewed. The Christian Spiritual Participation Profile (CSPP) was administered to SMs as an …

The Effect Of Embedded Metacognitive Prompts And Probes On Students’ Awareness In A Multimedia Lesson For Elementary School Students, Wendy Janine Parcel Edd

Dissertations

In a study he called The Effect of Embedded Metacognitive Cues and Probes on Use of Learner Control Features in an On-line Lesson for Elementary Students, Watson (2001) found that minimal prompting by an online tutorial increased 5th grade students’ comprehension of how much they understood. While Watson’s findings demonstrated a significant difference in the ability of prompted and non-prompted students to accurately predict their own performance on posttests, actual scores were not greater than those of control students until the results were analyzed by gender. The purpose of this study was to replicate and extend Watson’s study to determine …

Perceptions Of Physical Therapy Faculty On The Inclusion Of Spirituality In Physical Therapy Education, Janice C. Pitts

Dissertations

Problem

The physical therapy profession currently does not require the integration of spirituality in patient care in the physical therapy curriculum, and it is unclear how physical therapy faculty and practitioners view its inclusion. There is limited research literature on the integration of spirituality in the field of physical therapy or within its academic environment.

Method

The study utilized standard survey research methodology to gather data relating to spirituality and its inclusion in a physical therapy curriculum. Five participants from each of 101 sampled programs received a survey instrument along with instructions and consent form disseminated through electronic mailing. Data …

Suicide Attempt And Characteristics Of Religiously Affiliated Puerto Rican Adolescents And Young Adults, Saúl Rivera

Dissertations

Problem. Recent research has identified several risk factors associated with attempted suicide among the general population. Puerto Ricans, in general, and Puerto Rican Seventh-day Adventists (SDAs), in particular, may face unique challenges that are related to their familial, social, and religious environment that may affect the suicidal attempts among this group. Therefore, this study examined family-related factors, history of being abused, religiosity factors, sexuality factors, gender, substance abuse, age, and socioeconomic status factors among a sample of religiously affiliated Puerto Ricans (73.2% SDAs) living on the island.

Methodology. The data for the study came from the Avance PR study. Avance …

Aims Of Education In The Writings Of Ellen White, Erling Bernhard Snorrason

Dissertations

Problem. Ellen White’s educational philosophy and its application to the aims of education have not been systematically or thoroughly addressed within the parameters and demands of a graduate thesis. The present dissertation explores the aims of education, especially the ultimate aims of education, in the writings of Ellen G. White, one of the founders of the Seventh-day Adventist Church, and could be of value in assessing the present Seventh-day Adventist educational enterprise.

Method. This dissertation is a description and an analysis of Ellen White’s concept of education as revealed by her understanding of the aims of education. It is a …

Youth Ministry And Beliefs And Values Among 10- To 19-Year-Old Students In The Seventh-Day Adventist School System In North America, A. Barry Gane

Dissertations

Problem. A survey of the literature revealed that there was little by way of empirical study on the relationship between youth ministry and attitudes, beliefs, and values held by young people. We empirically tested the anecdotal evidence that youth ministry is effective in the transmission of beliefs and values. The purpose of this study was to ascertain whether Seventh-day Adventist youth ministry in North America makes any difference in the lives of youth in the Seventh-day Adventist school system.

Method. The sample for this study was 10,832 10- to 19-year old students enrolled in SDA schools in 2001. …

Wendell Berry's Sociological Imagination: Agrarian Values And Good Leadership In A Postmodern Culture, Paul Alan Kaak

Dissertations

Problem. The question guiding my dissertation research was: In what ways do the writings of Wendell Berry, reflecting his sociological imagination, address and advance leadership theory with specific regard for the issue of agrarian values?

Method. I used the writings of Wendell Berry as a modified case study for my inductive, theoretical, exploratory research in a qualitative vein. As I reviewed his writings, I identified his moral ideology and extracted his value-set. Along the way, I observed Berry's use of a method promoted by C. Wright Mills in his book The Sociological Imagination (1959). Since sociological imagination finds …