Digital Commons Network^™

A Study Of The Impact Of The Workplace Learning Function On Organizational Excellence By Examining The Workplace Learning Practices Of Six Malcolm Baldrige National Quality Award Recipients, Cynthia J. Lewis Edd

Dissertations

The purpose of this study was to evaluate the role the learning function plays in the pursuit of organizational excellence with the goal of identifying key factors, models and descriptions of successful workplace learning practices. A total of six Malcolm Baldrige National Quality Award Recipients, one from each Baldrige sector participated in this study. Data was collected through in depth, semi-structured, face-to-face interviews with the person responsible for workplace learning or their representative in each organization. The findings indicated that workplace learning professionals should be part of the strategic planning process within an organization and that workplace learning benefits strongly …

From The Border To The Boardroom: The Journey To The Community College Presidency For Mexican-American Women, Yesenia Noreeka Avalos

Dissertations

The purpose of this qualitative cross-case analysis study is to examine the professional pathways of female Mexican-American community college presidents. The Hispanic/Latino population has grown immensely in the United States since 2000. The demographic profile for community colleges has evolved to reflect the population changes within the country. Community colleges grew tremendously during the 1960s and 1970s and now thirty to forty years later these institutions are searching for new executive level leaders. Looking to the future, there is an opportunity for the face of community college leadership to change.

Similarly to other women, Latinas are moving into education leadership …

Data Gathering And Decision Making Among Community College Faculty Union Leaders, Mary K. O'Sullivan

Dissertations

The purpose of this study was to identify how faculty union leaders gather data and incorporate past experience to prioritize decisions for new contract negotiations in Illinois community colleges. The National Labor Relations Act of 1935 legalized collective bargaining in the United States, but state laws further regulate collective bargaining and make such agreements enforceable under state law. The Illinois Educational Labor Relations Act (IELRA) requires educational employers to bargain in good faith with the employees’ exclusive representative.

Specifically, this qualitative case-study research sought to identify the strategies undertaken by community college faculty union leaders to prepare for, and prioritize …

Cao Perspectives: The Role Of General Education Objectives In Career And Technical Programs In The United States And Europe, Jennifer Ballard Schanker

Dissertations

Globalization is changing the way students prepare for careers in the United States and Europe as competition for highly skilled workers is increasing among companies, regions, and nations. Success in this environment requires skills beyond the ability to perform job-related tasks. Skills of this nature are described as “liberal arts,” “basic” or “soft” skills or more broadly, “general education.” This international comparative study examines the processes used to identify, embed, and assess outcomes related to general education within career and technical programs in selected institutions in Europe and the Midwestern United States through the perceptions of their Chief Academic Officers …

Two Paths, One Goal: Student Success Examining Student Affairs In Community Colleges And For-Profit Post-Secondary Institutions, De'reese L. Reid-Hart

Dissertations

In the 21^st century, the potential for opportunities to obtain an education has become a reality and as a result, many students are embarking on a journey of social mobility and are assimilating into the milieu of higher learning. Affordability, accessibility, and program types are factors that have historically made public community colleges the primary option for students as they aspired to obtain higher education. However, with the rapid growth of for-profit post-secondary institutions offering similar programs, flexible hours, and accelerated degree options, students who would have traditionally enrolled at a public community college are now choosing to attend …

Examining The Motivating Factors That Influence Students With An Associate's Degree To Complete A Bachelor's Degree At A Private University, Rudolph D, Smith

Dissertations

The intent of this study was to shed light on the reasons and factors that influence the decision for community college graduates to complete a bachelor’s degree at a private, not-for-profit university. In addition, this study sought to identify and describe why students persist during degree completion programs, as well as the inhibitors and facilitators found throughout such programs.

This research was built on the qualitative research paradigm employing semi-structured interviews and focus groups to investigate how the elements of motivation theory influenced students to complete a bachelor’s degree program. The findings from the study validate that students are motivated …

An Exploration Of How Disability Support Services Are Evaluated In Select Community Colleges, Donna Anita Walker

Dissertations

The purpose of this qualitative multi-site study was to explore how disability support service programs are evaluated in select Illinois community colleges through the use of the CIPP (context, input, process, and product) program evaluation framework. Stufflebeam’s (1969) CIPP model of program evaluation was adapted for this study. The study was undertaken to determine the following: (a) the fundamental elements of these programs; (b) why and in what ways the programs are implemented; (c) the evaluation process and impact on services; and (d) the influence of the knowledge base and skills of the director.

Based on the study findings, while …

Exploring Successful Strategies For Integrating Academic Assessment And Strategic Planning In The Community College, Roberetta Young

Dissertations

This study is an exploration of the strategies employed by community colleges to facilitate the integration of their assessment and strategic plans. Because the strategic and assessment plans are major documents that guide the success of the institution, they are submitted frequently as evidence of meeting the accreditation requirement for institutional effectiveness. If the colleges’ success is based on the effectiveness and efficiency of their plans, then the assessment plan needs to be linked and integrated with the institutions strategic plan. The intent of this research study is to identify how community colleges integrate assessment and strategic plans to improve …

Giving My Heart A Voice: Reflection On Self And Others Through The Looking Glass Of Pedagogy: An Autoetnography, Vera L. Neyman

Dissertations

To improve students academic outcomes this auto-ethnographic dissertation examines my teaching practice in the Ukraine and in the United States, and the similarities and differences between the two educational systems. This study, designed in the form of auto-ethnographic vignettes, explores the effect of my personal and professional metamorphosis on the academic advancement of my students, and investigates the conditions that molded me into a teacher I am today. Through the reflections on the process of self-development as an individual and a teacher, I discovered that building the relationship of trust between school and family is an underlying condition for improving …

Listening To The Community: An Appreciative Case Study Of Service-Learning Initiatives Within A Higher Education Institution, Matthew Price Mccrickard

Dissertations

Service-learning has become a prevalent topic of discussion on college and university campuses across the United States. Students engage in internships, service activities, and mission trips to far-away places as well as neighborhoods down the street in order to gain experience and apply what they are learning in a realistic setting. The purpose of this study was to identify ways a higher education institution listens to the voice of the community in which it resides throughout its implementation of service-learning initiatives. The concept of power, as described by Lukes (2005), provided the primary theoretical framework for this case study informed …

Effect Of Dry Particle Coating On The Properties Of Cohesive Pharmaceutical Powders, Lauren Elizabeth Beach

Dissertations

Engineered particles, which have undergone surface modification via dry coating, have been previously shown to have improved flow and handling properties. The improvements in these properties can be applied and are very useful for a number of industrial applications, in this case the pharmaceutical industry. This work investigates the effect of dry particle coating to improve the flowability of cohesive active pharmaceutical ingredient (API) powders and their blends. Improving the flow properties of cohesive API powders can significantly improve their handling and subsequent use for pharmaceutical processes such as formulation and manufacturing processing operations. Although it has been shown that …

A 3-Dimensional Vascularized Cardiac Tri-Culture Model Using Chitosan Nanofiber Scaffolds, Ali Hussain

Dissertations

The development of an in vitro tissue model that can mimic the 3-dimenisonal (3-D) cellular architecture and mosaic of myocardial tissue holds great value for cardiac tissue engineering, modeling, and cardiovascular drug screening applications. The main objective of this project was to develop a 3-D vascularized cardiac tissue model in vitro for improved survival and function.

The cellular mosaic of the myocardial tissue demands the intricate integration of an extracellular matrix-like scaffold, cellular constituents, and biological factors. The first aim of the research was to fabricate and characterize a biodegradable chitosan nanofiber scaffold that would resemble the extracellular matrix (ECM) …

Enhanced Membrane Distillation : Analytical And Deionization Applications, Ken Gethard

Dissertations

Membrane distillation (MD) is a newer technology that is being investigated for applications such as seawater desalination and concentration of fruit and sucrose solutions. The major advantage of MD over traditional thermal distillation is that it requires a substantially lower thermal energy requirement to power the process. This allows low grade energy sources such as waste heat or solar energy to be used with MD. Compared to concentration processes such as reversed osmosis or ion-exchange, MD does not require specialized equipment, high electrical consumption, the use of strong acids and bases nor does it generate hazardous waste as a by-product. …

A Study Of Three Transition Metal Compounds And Their Applications, Zhen Qin

Dissertations

The La_5/8-yPr_yCa_3/8MnO₃ with colossal magnetoresistance (CMR) effect has a rich phase diagram and is well studied for its electronic phase separation phenomenon, where the ferromagnetic (FM) metal order co-exists and competes with the charge-ordered (CO) insulator phase. High Pr doping will favor the CO order, leading a sharp FM to CO dominated phase transition around Pr concentration of 0.3 and above. Hydrostatic pressure favors FM metallic order without damaging the sample and can be tuned continuously. In this study, pressurized-magnetic and resistivity measurements was done on a La_0.25Pr_0.375Ca_{0.375 …}

Anti-Solvent Precipitation And Subsequent Film Formation Of Hydrophobic Drugs For Drug Delivery, Xiangxin Meng

Dissertations

It is estimated that about forty percent of the drug molecules being developed by the pharmaceutical industry are hydrophobic in nature, leading to poor water solubility and bioavailability in the gastrointestinal tract. Dissolution is a limiting factor in their in vivo performance, and increasing their dissolution rate is a major challenge. It has been proven that the dissolution rate is directly proportional to the specific surface area, which can be effectively increased by reducing the particle size. Therefore, considerable efforts have gone into developing reliable and efficient methods for the manufacture of fine particles. Particle size reduction technologies such as …

Electrodeless Electro Hydrodynamic Printing Of Personalized Drug Dosages, Ezinwa Okeoma Elele

Dissertations

There is compelling evidence that variability in drug efficacy in individuals depends on their genetic fingerprints. These observations have given rise to the concept of personalized therapy whose ultimate goal is to develop medicinal agents designed for each niche of the population and individual patients according to their genetic background. The drawback in current pharmaceutical technologies is that most processes are designed to target large population and are unable to meet the demand of small-scale manufacturing of tailored therapeutics with diverse range of physical properties. One of the major challenges lie in developing efficient and cost effective methods of manufacturing …

Magnetic Seeding Aggregation To Enhance The Removal Efficiency Of Tio2 Nanoparticles From Water, Ashish Dhananjay Borgaonkar

Dissertations

Engineered nanoparticles, such as titanium dioxide (TiO₂), are important building blocks for the evolution of nanotechnology in industries and commercial products. Ever so increasing use of the engineered nanoparticles is bound to result in a substantial fraction of these nanoparticles ending up in wastewater; or surface water and groundwater, which are sources of intake for drinking water treatment. Removal of these engineered nanoparticles in wastewater and drinking water treatment processes is a very important step towards the protection of environmental and public health as well as protecting water treatment units from fouling and other issues.

Experimental studies showed …

Deagglomeration And Mixing Via The Rapid Expansion Of High Pressure And Supercritical Suspensions, Daniel To

Dissertations

Nano-materials are the focus of many research activities due to the desirable properties imparted from their small grain size and high interfacial surface area. However, these materials are highly cohesive powders in the dry state and typically form large agglomerates, leading to a diminished surface area or even grain growth, which minimizes the effectiveness of these nanomaterials. This dissertation addresses the issue of mixing nanopowders constituents by deagglomerating them and achieving simultaneous mixing so that even after inevitable reagglomeration, the effectiveness of large interfacial surface area may be preserved.

Nano-particle mixtures were prepared using the environmentally benign dry mixing methods …

Confidence Bands For Survival Functions Under Semiparametric Random Censorship Models, Peixin Zhang

Dissertations

In medical reports point estimates and pointwise confidence intervals of parameters are usually displayed. When the parameter is a survival function, however, the approach of joining the upper end points of individual interval estimates obtained at several points and likewise for the lower end points would not produce bands that include the entire survival curve with a given confidence. Simultaneous confidence bands, which allow confidence statements to be valid for the entire survival curve,would be more meaningful

This dissertation focuses on a novel method of developing one-sample confidence bands for survival functions from right censored data. The approach is model- …

Analysis Of Mueller Matrices Of Metamaterials And Multiferroics, Paul D. Rogers

Dissertations

The optical spectra of complex materials such as magnetic-dielectric media, magnetoelectric and multiferroic crystals, materials with intrinsic chirality, and metamaterials are studied. These media are important both for: (i) their interesting optical effects, such as Negative Index of Refraction (NIR) and impedance matching; and (ii) possible device applications such as switching devices and anti-reflection coatings. Proper characterization of complex materials requires advanced spectroscopic approaches and the development of theoretical models for data analysis. Berreman’s 4´4 matrix formalism is used to derive forward models for the optical spectra of Reflectivity, Transmission, Rotating Analyzer Ellipsometry (RAE), and Mueller Matrices (MM). The forward …

Development Of Advanced Algorithms To Detect, Characterize And Forecast Solar Activities, Yuan Yuan

Dissertations

Study of the solar activity is an important part of space weather research. It is facing serious challenges because of large data volume, which requires application of state-of-the-art machine learning and computer vision techniques. This dissertation targets at two essential aspects in space weather research: automatic feature detection and forecasting of eruptive events.

Feature detection includes solar filament detection and solar fibril tracing. A solar filament consists of a mass of gas suspended over the chromosphere by magnetic fields and seen as a dark, ribbon-shaped feature on the bright solar disk in Hα (Hydrogen-alpha) full-disk solar images. In this dissertation, …

A Study Of The New York / New Jersey Coastal Water : Bio-Optical Characteristics Of The Harbor Estuary And The Effects Of Heavy Metals On Brown Tide Alga Of The Bight, Bin Wang

Dissertations

The New York / New Jersey (NY/NJ) coastal area is one of the most productive regions around the world and a major natural and scenic resource for New York and New Jersey. As a result of excessive nutrient loading in the water, algal blooms have been observed since 1950’s. The NY/NJ coastal area includes the NY/NJ Bight and the NY/NJ Harbor Estuary, and in the former, brown tides (Aureococcus anophagefferens) were first observed in 1985 becoming a more serious water quality problem over the last 25 years. The influence of micronutrients, namely trace metals, on A. anophagefferens that are widespread …

High-Order Adaptive Methods For Computing Invariant Manifolds Of Maps, Jacek K. Wrobel

Dissertations

The author presents efficient and accurate numerical methods for computing invariant manifolds of maps which arise in the study of dynamical systems. In order to decrease the number of points needed to compute a given curve/surface, he proposes using higher-order interpolation/approximation techniques from geometric modeling. He uses B´ezier curves/triangles, fundamental objects in curve/surface design, to create adaptive methods. The methods are based on tolerance conditions derived from properties of B´ezier curves/triangles. The author develops and tests the methods for an ordinary parametric curve; then he adapts these methods to invariant manifolds of planar maps. Next, he develops and tests the …

Efficient Packet Delivery In Modern Communication Networks, Nan Wang

Dissertations

Modern communication networks are often designed for diverse applications, such as voice, data and video. Packet-switching is often adapted in today’s networks to transmit multiple types of traffic. In packet-switching networks, network performance is directly affected by how the networks handle their packets. This work addresses the packet-handling issues from the following two aspects: Quality of Service (QoS) and network coding.

QoS has been a well-addressed issue in the study of IP-based networks. Generally, nodes in a network need to be informed of the state of each communication link in order to make intelligent decisions to route packets according to …

Markovian And Stochastic Differential Equation Based Approaches To Computer Virus Propagation Dynamics And Some Models For Survival Distributions, Lianzhe Xu

Dissertations

This dissertation is divided in two Parts. The first Part explores probabilistic modeling of propagation of computer 'malware' (generally referred to as 'virus') across a network of computers, and investigates modeling improvements achieved by introducing a random latency period during which an infected computer in the network is unable to infect others. In the second Part, two approaches for modeling life distributions in univariate and bivariate setups are developed.

In Part I, homogeneous and non-homogeneous stochastic susceptible-exposed-infectious- recovered (SEIR) models are specifically explored for the propagation of computer virus over the Internet by borrowing ideas from mathematical epidemiology. Large computer …

Optimizing Resource Allocation In Next-Generation Optical Access Networks, Jingjing Zhang

Dissertations

To meet rapidly increasing traffic demands caused by the popularization of Internet and the spouting of bandwidth-demanding applications, Passive Optical Networks (PONs) exploit the potential capacities of optical fibers, and are becoming promising future-proof access network technologies. On the other hand, for a broader coverage area and higher data rate, integrated optical and wireless access is becoming a future trend for wireless access. This thesis investigates three next-generation access networks: Time Division Multiplexing (TDM) PONs, Wavelength Division Multiplexing (WDM) PONs, and WDM Radio-Over-Fiber (RoF) Picocellular networks.

To address resource allocation problems in these three networks, this thesis first investigates respective …

Sequential Bayesian Filtering For Spatial Arrival Time Estimation, Rashi Jain

Dissertations

Locating and tracking a source in an ocean environment as well as estimating environmental parameters of a sound propagation medium is of utmost importance in underwater acoustics. Matched field processing is often the method of choice for the estimation of such parameters. This approach, based on full field calculations, is computationally intensive and sensitive to assumptions on the structure of the environment. As an alternative, methods that use only select features of the acoustic field for source localization and environmental inversion have been proposed. The focus here is on inversion using arrival times of identified paths within recorded time-series. After …

Applications Of Stochastic Simulation In Two-Stage Multiple Comparisons With The Best Problem And Time Average Variance Constant Estimation, Dibyendu Chakrabarti

Dissertations

In this dissertation, we study two problems. In the first part, we consider the two-stage methods for comparing alternatives using simulation. Suppose there are a finite number of alternatives to compare, with each alternative having an unknown parameter that is the basis for comparison. The parameters are to be estimated using simulation, where the alternatives are simulated independently. We develop two-stage selection and multiple-comparison procedures for simulations under a general framework. The assumptions are that each alternative has a parameter estimation process that satisfies a random- time-change central limit theorem (CLT), and there is a weakly consistent variance estimator (WCVE) …

Uniform Heating Of Thin Ceramic Slabs In A Multimode Microwave Cavity, Shuchi Agrawal

Dissertations

Two-dimensional reaction diffusion equations, which contain a functional and an inhomogeneous source term, are good models for describing microwave heating of thin ceramic slabs and cylinders in a multi mode, highly resonant cavity. A thin ceramic slab situated in a TEN03 rectangular cavity modeled in the small Biot number limit and a thin silicon wafer situated in a TM101 cylindrical cavity modeled in the small fineness ratio limit are studied to gain insight into the dynamics of the heating process. The evolution of temperature is governed by a two-dimensional reaction diffusion equation and a spatially non-homogeneous reaction term. Numerical methods …

Asymptotic And Numerical Analysis Of Time-Dependent Wave Propagation In Dispersive Dielectric Media That Exhibit Fractional Relaxation, Matthew Frank Causley

Dissertations

This dissertation addresses electromagnetic pulse propagation through anomalously dispersive dielectric media. The Havriliak-Negami (H-N) and Cole-Cole (C-C) models capture the non-exponential nature of such dielectric relaxation phenomena, which is manifest in a variety of dispersive dielectric media. In the C-C model, the dielectric polarization is coupled to the time-dependent Maxwell's equations by a fractional differential equation involving the electric field. In the H-N case, a more general pseudo-fractional differential operator describes the polarization.

The development and analysis of a robust method for implementing such models is presented, with an emphasis on algorithmic efficiency. Separate numerical schemes are presented for C-C …