Digital Commons Network^™

Can Phishing Education Enable Users To Recognize Phishing Attacks?, Hanaa Alghamdi

Dissertations

Phishing attacks have increased rapidly and caused many drastic damages and losses for internet users‟ .The purpose of this research is to investigate on effectiveness of phishing education and training to help users identify different forms of phishing threats. The study has been conducted through developing a phishing quiz mobile application which includes four kinds of phishing threats. It tested the ability of users to recognize spoofed emails, SMS phishing (SMshing), scam phone calls (Vishing), and phishing through social media networks. A comprehensive literature review was discussed to investigate on the research area, understand the research problem, support the proposed …

Technology Integration In Context, Joanna Marshall

Dissertations

This study employed an ecological framework to examine how multiple contextual variables from the state biosphere, district biome, school habitat and classroom niche impact how teachers decide to integrate technology. It was an opportunity to observe how a teacher's Technological Pedagogical Content Knowledge operates in a classroom in response to the building, district and state contexts. It was conducted in multiple classrooms in one school and with science teachers. It included a self-study component. It provided an opportunity to directly observe the interactions between students and teacher as distinct species in the classroom when technology integration occurred. This allowed me …

Survival Under Oppression: The Puerto Rican And Allied Struggle For Representation In Chicago, 1950-1983, Marisol Violanda Rivera

Dissertations

This dissertation explores the how various Latino organizations spanning from 1950 to 1983, helped Latinos gain representation within Chicago. Social clubs, which brought opportunity to European ethnics, no longer functioned as a conduit to direct power as white ethnics solidified their positions in the city. Progressive Latino organizations under government oppression suffered destruction or evolved in effort to obtain better opportunities for Latinos. Oral histories show how members of the organizations develop their own narratives and reveal the creation of discourses regarding events that occurred as well as the impact they had within their lives and on the community.

Gradient Coverslip (Gcvsl) : A Novel Way To Culture Cells Under Hypoxia, Brenda Smith Wright

Dissertations

Solid tumors can have areas of hypoxia. Hypoxia is associated with changes in tumor cell metabolism, with radiation therapy resistance, with chemotherapy resistance, and with tumor aggressiveness. Yet most cell culture research and drug studies are based on cell lines grown in atmospheric oxygen (normoxia). Our hypothesis was that differences in protein levels, differences in mitochondrial morphology, and differences in killing of cells by drug compounds in normoxic and hypoxic conditions would be observed. Normoxic conditions were achieved by culturing cell lines in humidified incubators supplemented with 5% CO2. Hypoxic conditions were achieved by culturing cells in a culture chamber, …

Site Specific Isotopic Labeling Of Phenylalanine And Tyrosine : Application To Pth1, Bhargavi Ramaraju

Dissertations

Structural insight into biological macromolecules furthers understanding of function and provides a variety of information about cellular processes. Though NMR spectroscopy can be utilized to provide such insight, limitations, including size, are significant barriers. Site specific isotope labeling can be used to provide information on a variety of systems including large, slow tumbling systems and membrane proteins that are not amenable to study by traditional means. In effect, site specific isotope labeling increases the size barrier and thereby number of macromolecular systems able to be studied by NMR spectroscopy. Methyl labeling has been established as a leading method for site …

Synthesis Of Amphiphilic Pegylated Poly([Alpha]-Amino Acid) Tercopolymers And The Impact Of Molecular Architecture On Their Use As Gene And Drug Delivery Vectors, David J. Ulkoski

Dissertations

Poly(α-amino acid)s (PAAs) are a diverse class of polymers that can be synthesized or biologically derived. PAAs have been widely used for biomedical applications due to their biodegradability and biocompatibility. Living polymerization through ring opening polymerization of amino acid N-carboxyanhydrides using a nucleophilic initiator provides the potential to manipulate polymer architecture and physiochemical characteristics. In this study, we investigate the use of amphiphilic block and random PAA tercopolymer constructs that contain ionic and hydrophobic components. The amphiphilic character for each tercopolymer allows for the formation nanoparticles that can be used in gene and drug delivery. Each tercopolymer component provides a …

Assimilation Of Coupled Microwave/Thermal Infrared Soil Moisture Profiles Into A Crop Modeling System, Vikalp Mishra

Dissertations

The main focus of this study is to utilize Microwave (MW) and Thermal Infrared (TIR) based satellite derived soil moisture (SM) estimates within a robust, state-of-the-art crop model for obtaining gridded, high spatio-temporal estimates of crop yield and water stress, particularly during drought conditions. The study is unique in many aspects: primarily, it integrates MW and TIR based techniques to provide SM estimation from the surface (0-5 cm) downward to the rooting depth (2 m); further, for the first time, the Principle of Maximum Entropy (POME)-derived SM profiles were developed to drive a gridded crop model. This study allowed us …

Moving Target Defense Based On Mobile Ipv6, Vahid Heydari

Dissertations

Remote cyber attacks can be started from unlimited distance. These remote attacks include special actions which allow attackers to compromise remote systems. During the first step of attacks, reconnaissance step, attackers attempt to gather information about their intended target(s). For network-based systems, figuring out the IP address(es) of the target(s) is critical to the success of the attack. The use of static IP addresses leaves the target vulnerable in two ways. First, they are discoverable. Second, after accessing the target, the attacker can maintain this access for a long time. So an effective defense is a mechanism to change the …

Novel Methods In Harvest Of Microalgae And Extraction Of Lipids From Dilute Microalgal Suspension For Biofuel, Chen Zhang

Dissertations

A method of using organic solvent (hexane, 1-butanol, ethyl acetate) to harvest freshwater microalgae Nannochloropsis sp. by tuning microalgal cell surface hydrophobicity with low pH was reported. Harvesting experiments were performed with culture suspension of 60 mL with biomass concentration of 0.35 g/L and 0.85 g/L. Due to cell surface hydrophobicity, microalgal cells attach to the organic solvent and water interphase after separation. Suspension pH of 3 resulted in the highest harvesting efficiency (92-99%) depending on the organic solvent with processing time of 3 min. This method is efficient, cost-effective and eco-friendly as the supernatant can be reused as growth …

Analytical Investigation Of Thermoacoustic Instabilities In Premixed Combustion Systems, Vijaya Krishna Rani

Dissertations

The primary objective of this dissertation is to develop and investigate various analytical methods to predict thermoacoustic instabilities in premixed combustion systems. The analytical models derived as part of this study are of four main types: (1) Acoustically consistent, linear modal analysis method to predict the longitudinal and transverse combustion instabilities in a dump combustor; (2) Novel level set method for deriving flame surface-area response to incident acoustic fluctuations; (3) Novel approximate analytical solutions to acoustic waves in inhomogeneous media; and (4) Investigation of the limit-cycle behavior of nonlinear acoustic wave equation with combustion source term. The linear modal analysis …

Quantum Dot Photoluminescent Dynamics And Exciton-Plasmon Coupling In The Presence Of Dielectrics, Metal Oxides, And Metallic Nanoparticles, Waylin J. Wing

Dissertations

Nanomaterials such as quantum dots (QDs) and metallic nanoparticles (MNPs) play an important role in physics and engineering, especially for applications such as next-generation display devices or computer processors. When used simultaneously, QDs and MNPs can couple together through a mechanism called exciton-plasmon coupling. This dipole-dipole coupling yields increased control over the optical properties of the combined system, such as enhanced emission, polarization selectively, and directionality of light. In this dissertation, a new method by which to increase the strength of exciton-plasmon coupling is presented which can boost the emission efficiency of QDs beyond the currently known plasmonic channels. This …

An Empirical Look At The Impact Of Course And Faculty Characteristics On Student Evaluations, Travis J. Degheri

Dissertations

Student evaluations of college instructors are anything but a new phenomenon, having been used since the early 1900s. Today, universities around the world continue to use student evaluations as a means for measuring instructor effectiveness. Despite concerns of student objectivity, at many institutions these evaluations have a sizable influence on decisions involving faculty promotion, tenure, and merit salary increases. While there is much literature examining student evaluations, few studies have provided a longitudinal, multi-discipline exploration of the impact course and faculty characteristics have on student evaluations.

To address this gap in the literature, this study used publically available data collected …

Examining Hybrid-Gift Philanthropy In Division I Intercollegiate Athletics: A Mixed Methods Study, John Thomas O'Sullivan

Dissertations

Over the past few decades, the money and attention associated with Intercollegiate Athletics (ICA) has exploded. At the same time, however, many ICA departments claim to be at a financial crossroads with coaching salaries and operational costs soaring upwards. Not surprisingly, ICA departments are responding by focusing on increasing their fundraising in innovative ways. Perhaps the most interesting of these is in the area of hybrid—or blended—giving, which combines cash with a deferred gift. While these gifts have the potential to help generate substantially more revenue for ICA, unfortunately there is limited empirical research surrounding them.

In an effort to …

Critical Media Literacy Instruction With Teacher Residents In Urban Catholic Schools: A Comparative Case Study Approach To Implementation And Critical Transformational Learning, Jennifer K. Shah

Dissertations

Critical literacy is a cultivated habit that students learn in order to read media texts in their world more consciously. The Catholic context is ideal for work around critical media literacy due to a continued mission and vision around social justice. This research fills gaps in literature relating to critical media literacy in Catholic schools. The goals are threefold: (1) to study the transformational learning of teacher residents as they learn about and implement critical media literacy in urban Catholic schools, (2) to identify supports and barriers related to this process in order to better address critical media literacy implementation …

Towards Improving Visqol (Virtual Speech Quality Objective Listener) Using Machine Learning Techniques, Joseph Mcnally

Dissertations

Vast amounts of sound data are transmitted every second over digital networks. VoIP services and cellular networks transmit speech data in increasingly greater volumes. Objective sound quality models provide an essential function to measure the quality of this data in real-time. However, these models can suffer from a lack of accuracy with various degradations over networks. This research uses machine learning techniques to create one support vector regression and three neural network mapping models for use with ViSQOLAudio. Each of the mapping models (including ViSQOL and ViSQOLAudio) are tested against two separate speech datasets in order to comparatively study accuracy …

An Exploration Study Of Using The Universities Performance And Enrolments Features For Predicting The International Quality, Aeshah Althagafi

Dissertations

Quality ranking systems are crucial in the assessment of the academic performance of an institution because these assessment systems give details about how different learning institutions deliver their services. Education quality is also of paramount importance to the students because it is through quality education that these students develop skills that are needed in the job market. Besides, education enhances a student's academic and reasoning capacities. When universities are subjected to ranking systems, they are likely to improve their quality to be ranked high in the system. When the university administrators are exposed to ranking, competition gears up. Through competition, …

The Influence Of Sensor-Based Intelligent Traffic Light Control On Traffic Flow In Dublin, Katja Rademacher

Dissertations

With growing cities and the increased use of vehicles for transportation purposes, there is a demand to make the traffic management in cities smarter. An intelligent traffic light control that dynamically adapts to the existing traffic conditions can help reduce traffic congestion and CO2 emissions. This thesis reviews the popular traffic light control approaches - static, actuated and adaptive – based on their influences on recorded traffic conditions in Dublin. The Irish capital relies heavily on busses for public transport adding to the number of already moving vehicles in the city centre. Using vehicle count data from inductive loop detectors …

Divorce After Long-Term Marriage : A Constructivist Grounded Theory Study, Melanie M. Somerville

Dissertations

Divorce is an enduring feature of American culture. As much as Americans value marriage, they also assert the right to divorce. The literature makes clear that modern couples expect their spouses to meet their individual personal goals of self-fulfillment and growth. Furthermore, divorce recovery is often portrayed as an individualistic endeavor. Changing attitudes about marriage and divorce have contributed to the current rate of divorce among midlife individuals, who have the highest divorce rates of any age group. Many individuals who divorce at midlife have been married for 20 or more years. Divorce is most often experienced as a disruption …

Cyber Bullying Among Irish Primary School Pupils, Eret Haava

Dissertations

Most research on cyber bullying has been carried out at a secondary school level among older children. Because of the sensitive nature of cyber bullying, there is very little research done at primary school level, however more and more it is starting to affect younger children. As all parents know from their own experiences, children’s lives nowadays are influenced by different electronic communication devices and the Internet. In addition to this, year on year they gain access and own them at earlier ages.

The Evaluation Of Ensemble Sentiment Classification Approach On Airline Services Using Twitter, Zechen Wang

Dissertations

In the field of sentiment classification, much research has been done on reviews of topics such as movies, software and books. Little research has been done in the airline service domain. In the airline industry, the use of social media as a customer service tool has become a growing phenomenon. The research conducted by Wan and Gao (2015) has proposed an ensemble classification approach for airline service sentiment classification using Twitter data. In accordance, the objective of improving the performance of ensemble classification approach is the primary consideration. This research proposed new hybrid classification approach that uses the state-of-art approach …

Second-Generation Thai American Women's Perceptions On Cervical Cancer Screening, Essie Asawapornmongkol

Dissertations

Background: Cervical cancer is one of the most preventable diseases in the United States (US) (Center for Disease Control and Prevention, 2015a). Despite advances in early detection and a vaccine available, it continues to affect Southeast Asian American (SEAA) women in high numbers. Multiple barriers to cervical cancer screening are seen among SEAA women, which include acculturation, age, marital status, apprehension, financial burden, access to healthcare, and knowledge about cervical cancer, screening, and preventative health (Ho & Dinh, 2010). Studies on SEAA women and cervical cancer screening primarily involve women who were born in Southeast Asia. These studies have not …

Toward The “Better Than Well” Cultural Ideal: Understanding Changing Conceptualizations Of Illness And Wellness And North American Parenting, Pedagogy, And Education Policy (19th-21st C.), Nicole Ortegon

Dissertations

In the history of the United States, dominant conceptualizations of mental illness and wellness have been informed by scientific discourses situated in somatic and psychogenic-based paradigms – each affecting parenting, pedagogy, and education policy. From the late nineteenth through twentieth century, the field of psychiatry would come to endorse a primarily psychogenic rather than somatic-based approach to mental health, conceiving of the mind rather than body as the primary locus of illness and wellness. This resulted in a shift from a problem-focused paradigm of mental illness to prophylactic-focused paradigm of mental wellness. Secondary scholarship on the history of psychology and …

Novel Antifungal Properties Of High Mannose Binding Lectins With Particular Emphasis On Scytovirin And Cryptococcus, Tyler Hays Jones

Dissertations

Fungal pathogens represent a growing concern in human health, and the advancement of new therapeutic options is essential. The encapsulated basidiomycotic yeast Cryptococcus causes severe meningoencephalitis and cryptococcosis results in over 600,000 deaths a year. The prevalence of cryptococcal infection is increasing, driving the need for new and improved treatments. Scytovirin is a high mannose binding lectin from the cyanobacterium Scytonema varium. Originally pursued as an antiviral, herein is reported novel antifungal activity with detailed characterization of activity against Cryptococcus. Scytovirin specifically binds Man4, the D3 arm of Man9, a carbohydrate moiety found on cryptococcal glycoproteins. Localization of Scytovirin in …

The Relationship Between Transmission Of Sexual Knowledge, Sexual Attitude, And Culture, Esther M. Hooley

Dissertations

Purpose

Sexual knowledge is important for healthy development of adolescents and adults. Currently, there is no consistent mode of introducing the topic of sex to an individual who has not previously learned about the topic. If a shift were to occur in transmission of sexual knowledge, whether by creating a consistent mode, a culture-specific mode, or focusing on sexual attitude rather than behavior, future populations would be positively influenced. If the educational system, religious organizations, and families could be informed of an appropriate and meaningful way to communicate sexual knowledge to adolescents, negative sexual outcomes have the potential to decrease …

Measuring The Perceived Effectiveness Of Five Selected Professional Courses Taken By Alumni Theology Majors And How They Are Related To Selective Demographics: A Mixed Methods Study, Barry J. Tryon

Dissertations

Problem

The study was prompted by the need for the evaluation of current theological educational programs for preparing students to meet the many challenges of pastoral ministry in a rapidly changing world. However, to date there has been little published research addressing the effectiveness of undergraduate theological education. Furthermore, changes implemented in the theological education program at Southern Adventist University (Southern) have not been evaluated for their effectiveness for ministerial job preparedness.

Method

This descriptive study measured the perceived effectiveness of five professional courses taught in the undergraduate theological educational program at Southern for ministerial job preparedness. A parallel mixed …

The Role Of Notch-1-Mediated Repression Of Pten On Growth And Cancer Stem Cell Survival In Trastuzumab Resistant, Her2+ Breast Cancer, Andrew Thomas Baker

Dissertations

Trastuzumab targets the ErbB2 (HER2) receptor on breast cancer cells to attenuate HER2 driven tumor formation. Trastuzumab reduces both downstream PI3K/Akt and MAPK pathway signaling as well as the breast cancer stem cell (BCSC) population. BCSCs are hypothesized to be responsible for tumor recurrence, metastasis, as well as drug resistance. Today, resistance to trastuzumab remains a major clinical problem for women diagnosed with HER2+ breast cancer. Attenuation of PI3K/Akt and MAPK pathways may occur through the tumor suppressor, PTEN. Women with HER2+ breast tumors expressing less PTEN and increased PI3K/Akt or MAPK activity have worse overall outcome. Previously we have …

We Can Do Better: Evaluating An Intervention Remedying Caseworkers’ Negative Racial Bias Towards African American Families Involved In Child Welfare, Adrianne Michele Fletcher

Dissertations

Given that U.S. history documents the severing of African-American family ties by isolating parents from each other and their children under slavery, it is imperative that the child welfare system be free of any echoes of that holocaust. Yet many scholars and practitioners who lament negative racial attitude, both implicit and explicit, may continue to contribute to the over-representation of African-American children in the U.S. child welfare system. This study proposes to examine a subcategory of practitioner attitudes, those about the caregivers’ race, and how those attitudes can be altered through a reflective educational experience. Drawing from pre-existing research about …

Investigating Novel Methods Of Interaction With Pharmaceutically Relevant Enzymes, Cory T. Reidl

Dissertations

Metalloproteins requiring one or more metal ions for normal function make up 30% of all known proteins, and many critical biological pathways contain at least one metallo-enzyme. Di-nuclear metallo-proteins constitute a large class of these proteins yet we currently lack effective methods of inhibiting these enzymes for the development of new medical therapies, particularly for the discovery of new antibiotics. Our work has focused on developing novel functionalities that selectively interact with di-nuclear catalytic centers, and we are targeting three separate di-zinc-metallo-enzymes that are unique to bacteria and play key roles in their growth and development. These enzymes are DapE, …

The Internalization Of The Model Minority Stereotype, Acculturative Stress, And Ethnic Identity On Academic Stress, Academic Performance, And Mental Health Among Asian American College Students, Hanna Yun-Han Chang

Dissertations

Previous studies in Asian American psychology literature on cultural factors of acculturation and ethnic identity have yielded mixed findings in its relation to psychological outcomes. Furthermore, there is a gap in the knowledge base regarding the internalization of the model minority stereotype and its impact on Asian Americans. Due to Asian Americans' tendency to value academic excellence as a result of socialization by cultural values and family upbringings, this study examined the effects acculturative stress, ethnic identity, and the internalization of model minority on academic stress, academic performance, and mental health.

Results of this study indicated that acculturative stress significantly …

Mutual Regulation Of Crp And N(Epsilon)-Lysine Acetylation In Escherichia Coli, Robert James Davis

Dissertations

Post-translational modifications, such as N(epsilon)-lysine acetylation, are known to alter the behavior of transcriptional regulators in eukaryotes, but very little is known about the consequences of acetylation on transcriptional regulation in bacteria. Here, I provide evidence that a global transcriptional regulator of carbon metabolism, cAMP Receptor Protein (CRP), promotes both enzymatic and non-enzymatic lysine acetylation in E. coli. Non-enzymatic lysine acetylation occurs when cells ferment acetate, such as during growth on high concentrations of glucose. Intriguingly, CRP can be non-enzymatically acetylated on several lysines, including lysine 100 (K100). I provide evidence that neutralization of the K100 positive charge, as would …