Digital Commons Network^™

An Evaluation Of Text Representation Techniques For Fake News Detection Using: Tf-Idf, Word Embeddings, Sentence Embeddings With Linear Support Vector Machine., Sangita Sriram

Dissertations

In a world where anybody can share their views, opinions and make it sound like these are facts about the current situation of the world, Fake News poses a huge threat especially to the reputation of people with high stature and to organizations. In the political world, this could lead to opposition parties making use of this opportunity to gain popularity in their elections. In the medical world, a fake scandalous message about a medicine giving side effects, hospital treatment gone wrong or even a false message against a practicing doctor could become a big menace to everyone involved in …

Drug Reviews: Cross-Condition And Cross-Source Analysis By Review Quantification Using Regional Cnn-Lstm Models, Ajith Mathew Thoomkuzhy

Dissertations

Pharmaceutical drugs are usually rated by customers or patients (i.e. in a scale from 1 to 10). Often, they also give reviews or comments on the drug and its side effects. It is desirable to quantify the reviews to help analyze drug favorability in the market, in the absence of ratings. Since these reviews are in the form of text, we should use lexical methods for the analysis. The intent of this study was two-fold: First, to understand how better the efficiency will be if CNN-LSTM models are used to predict ratings or sentiment from reviews. These models are known …

"An Environmental Sleight Of Hand:" Trash, Activism, And Urban Finance In Detroit, 1970-1990, Chelsea Denault

Dissertations

This dissertation explores the political, economic, and environmental choices that led city officials in Detroit to build the world's largest waste incinerator. in the 1970s, Detroit officials €“ led by Mayor Coleman Young €“ confronted the difficult financial realities of the urban crisis alongside the rise of a new environmental issue €“ the garbage crisis. a single solution to these dual crises seemed to present itself in €œresource recovery,€ the burning of municipal waste in an incinerator to produce steam and electricity. in the context of the energy crises of the 1970s, the logic of resource recovery was compelling to …

Engendering Empathy For Immigrants In Middle Grade Readers Through Culturally Relevant Young Adult Literature, Amy J. Cattapan

Dissertations

This dissertation uncovered the ways through which culturally relevant young adult literature (YAL) engenders empathy for immigrants in middle grade readers. Empathy was displayed through both affective and cognitive responses and resulted in mirror and window moments (Bishop, 1990) as well as crystallizing experiences. Their empathetic responses led students to apply critical literacy skills to issues related to stereotypes, racism, discrimination, and immigration policies.

I conducted a qualitative case study to examine the ways in which reading and discussing YAL about immigrants created empathy in eighth graders in a culturally and linguistically diverse middle school and in what ways it …

Institutions-Based Influence: The Vatican's Mediations Of International Conflicts, Mamy Wilson Daniel Randriamanantena

Dissertations

This dissertation examines why the Vatican as a global religious organization and the smallest state in the world is able to successfully mediate some difficult and intractable conflicts while it fails to do so in other cases. Drawing from the New Liberalism theory in International Relations, the mediation theory and the literature on the Vatican as a player in world affairs, it suggests the important role of the Vatican's institutions at both the global and local level, besides its spiritual and moral leverage. The method, which combines a longitudinal analysis, a process tracing procedure and a comparative analysis, is used …

Plasma Energization And Dissipation In The Heliosphere, Senbei Du

Dissertations

The energization and dissipation of plasma are ubiquitous processes in the heliosphere. They are the key to some of the most outstanding questions in heliophysics such as coronal heating and the acceleration of solar energetic particles. In this dissertation, we investigate plasma energization and dissipation based on the collisionless kinetic equation. Plasma energization is discussed using the evolution equations of bulk flow and thermal energy densities. In a two-fluid description, it has been suggested that the pressure-strain interaction converts bulk kinetic energy into thermal energy. In a single-fluid description, we find that the bulk acceleration and heating are due to …

Testing An Ecological Model Of Obesity Among School-Age Children: Identifying Targets For Tailored Intervention, Dorothy Mcleod Loren

Dissertations

Childhood obesity rates remain historically high in the US. One way to conceptualize the many factors that contribute to obesity is through the use of an ecological model. There is a particular need to adapt and test this type of comprehensive model among vulnerable racial/ethnic and socioeconomic groups. Using a large sample of US youth drawn from the ECLS-K:2011 (N=8,225), this project first investigated an ecological model of childhood obesity from kindergarten to second grade, including factors such as child physical activity, child screen time, child bedtime, family physical activity, family food insecurity, family meals, and neighborhood safety. Then, it …

Black Males Accessing And Usage Of Sex Education In Mississippi, Devin D. Moss

Dissertations

in the United States, sex education curricula sponsored by public school districts varies from state-to-state. Nationally, this arrangement provides students with varied levels of exposure to critical sex education information. Sex education is mandatory in Mississippi, but is not required to be medically accurate, include HIV education, and be culturally appropriate or unbiased. Mississippi's sex education curriculum is mandated to be age appropriate and can promote religion. the parameters of sex education in Mississippi have led to sex information gaps for youth. Black males experience this lack of information and turn to other sources to fill in the resulting information …

Voices Of African American Women In Computer Science: Implications For K-12 Stem Education And Beyond, Yolanda B. Sanders

Dissertations

Voices of African American Women in Computer Science is a qualitative dissertation about African American women who have successfully completed a computer science degree. This research explored how computer science education departments in predominantly White institutions (PWIs) contribute to the oppression of African American females. Critical race feminism (CRF) provides the platform that places the voices of women of color who have successfully obtained a computer science degree despite difficulties that have been imposed by the reality of racial biases that are present throughout the American education system and American culture at large. This research was guided by the following …

A Quantitative Comparative Study Of Employee Engagement Among Full-Time Seventh-Day Adventist Pastors In The North American Division Of Seventh-Day Adventists And Its Relationship To Level Of Participation In Annual Pastoral Continuing Education (Ce), Sharon Aka

Dissertations

Problem

Research was needed to determine the relationship between pastoral CE and employee engagement to guide policy implementation as well as future efforts for pastoral professional development within the Adventist organization.

Method

This study presents a new theoretical Adventist pastor development model integrating several theories and concepts including: the call, the Seven Core Qualities of an NAD pastor framework, andragogy, CE, SDT, and employee engagement. Employee engagement was measured using Herzberg's hygiene-motivation factor employee engagement theory. Comparisons were conducted on six groups of pastors related to selfreported participation in annual CE.

Results

Major research findings indicate that pastors, perhaps inevitably …

Identifying Online Sexual Predators Using Support Vector Machine, Yifan Li

Dissertations

A two-stage classification model is built in the research for online sexual predator identification. The first stage identifies the suspicious conversations that have predator participants. The second stage identifies the predators in suspicious conversations. Support vector machines are used with word and character n-grams, combined with behavioural features of the authors to train the final classifier. The unbalanced dataset is downsampled to test the performance of re-balancing an unbalanced dataset. An age group classification model is also constructed to test the feasibility of extracting the age profile of the authors, which can be used as features for classifier training. The …

Classification Of Animal Sound Using Convolutional Neural Network, Neha Singh

Dissertations

Recently, labeling of acoustic events has emerged as an active topic covering a wide range of applications. High-level semantic inference can be conducted based on main audioeffects to facilitate various content-based applications for analysis, efficient recovery and content management. This paper proposes a flexible Convolutional neural network-based framework for animal audio classification. The work takes inspiration from various deep neural network developed for multimedia classification recently. The model is driven by the ideology of identifying the animal sound in the audio file by forcing the network to pay attention to core audio effect present in the audio to generate Mel-spectrogram. …

Finetuning Pre-Trained Language Models For Sentiment Classification Of Covid19 Tweets, Arjun Dussa

Dissertations

It is a common practice in today’s world for the public to use different micro-blogging and social networking platforms, predominantly Twitter, to share opinions, ideas, news, and information about many things in life. Twitter is also becoming a popular channel for information sharing during pandemic outbreaks and disaster events. The world has been suffering from economic crises ever since COVID-19 cases started to increase rapidly since January 2020. The virus has killed more than 800 thousand people ever since the discovery as per the statistics from Worldometer [1] which is the authorized tracking website. So many researchers around the globe …

Investigating The Predictability Of A Chaotic Time-Series Data Using Reservoir Computing, Deep-Learning And Machine- Learning On The Short-, Medium- And Long-Term Pricing Of Bitcoin And Ethereum., Molly Kenny

Dissertations

This study will investigate the predictability of a Chaotic time-series data using Reservoir computing (Echo State Network), Deep-Learning(LSTM) and Machine- Learning(Linear, Bayesian, ElasticNetCV , Random Forest, XGBoost Regression and a machine learning Neural Network) on the short (1-day out prediction), medium (5-day out prediction) and long-term (30-day out prediction) pricing of Bitcoin and Ethereum Using a range of machine learning tools, to perform feature selection by permutation importance to select technical indicators on the individual cryptocurrencies, to ensure the datasets are the best for predictions per cryptocurrency while reducing noise within the models. The predictability of these two chaotic time-series …

Nanostructured Titanium Dioxide As Novel Electrodes For Water/Wastewater Treatment, Amir Ahmadi

Dissertations

Electrochemical redox processes have emerged as a viable option for water and wastewater treatment as they offer several advantages such as capable of degrading a wide range of contaminants, small footprint, capability to adjust to influent fluctuation, and less waste generation. In electrochemical treatment applications, the electrode material largely determines the efficiency of the treatment processes. However, electrodes commonly used for water treatment may either suffer low reactivity and/or stability (e.g. metal and mixed metal oxides such as SnO2, PbO2, IrO2, RuO2, and IrO2/RuO2 electrodes) or be subject to limited applications due to high cost and the scarcity of the …

Pulsar Timing As A Direct Probe Of Galactic Dark Matter, Kiley Heflin

Dissertations

In the currently accepted paradigm, dark matter is hypothesized as an explanation for the flat rotation curves of galaxies under the assumption of virialized orbits. The use of millisecond pulsar (MSP) timing as a probe of Galactic dark matter content is explored as a means of challenging this assumption. A method of inference of the Galactic potential using frequency derivative $\dot{\nu}$ is produced, and an upper limit for a virialized Galactic rotation curve is given through direct observation of acceleration. The data set used includes 210 pulsars with known $\dot{\nu}$ and astrometric properties, a subset of which also have measured …

A Comparative Study Of Text Summarization On E-Mail Data Using Unsupervised Learning Approaches, Tijo Thomas

Dissertations

Over the last few years, email has met with enormous popularity. People send and receive a lot of messages every day, connect with colleagues and friends, share files and information. Unfortunately, the email overload outbreak has developed into a personal trouble for users as well as a financial concerns for businesses. Accessing an ever-increasing number of lengthy emails in the present generation has become a major concern for many users. Email text summarization is a promising approach to resolve this challenge. Email messages are general domain text, unstructured and not always well developed syntactically. Such elements introduce challenges for study …

Philosophy And Practice Of Wholistic And Physical Student Development At Select Seventh-Day Adventist Higher Educational Institutions And Work Colleges, Brenda Gay Palmer Chase

Dissertations

Problem and Purpose

There is an extensive array of literature and research espousing the importance of developing the whole student. Comparatively, there is limited research on examining how colleges and universities that promote wholistic student development incorporate each of the human dimensions into an integrated educational experience. There is, therefore, a need for scholarship that compares and contrasts how separate and distinct higher educational systems having a philosophy of educating the whole person define and implement the development of the physical dimension. Similarly, research is needed that examines how the differences in interpreting and implementing the development of the physical …

Community Violence Exposure Among Ethnic Minority Youth: Understanding The Predictive Roles Of Depressive Symptoms And Risky Behavior In A Community Sample, Amanda Nicole Burnside

Dissertations

Ethnic-minority youth residing in urban communities are disproportionately impacted by community violence exposure (ECV), and despite decades of research, rates of ECV in youth continue to increase. Further, person-based analyses have demonstrated variability in rates of ECV, even among youth who share similar risky demographic factors and it is important to examine the utility of psychological factors as predictors of ECV. Drawing from public health frameworks and the reciprocal-stress model, the current study seeks to better understand the longitudinal relationship between various components of depressive symptoms (depressed affect, somatic symptoms, depressive cognitions, suicidal thoughts and behaviors) in the prediction of …

Suffocated Cd8 T Cells In The Hypoxic Tumor Microenvironment, Lourdes Beatriz Plaza Rojas

Dissertations

Hypoxia is a common feature of solid tumors that plays an important role in angiogenesis, malignant progression and metastatic development. However, its impact on T cell anti-tumor responses is less known. We determined that CD8 tumor infiltrating lymphocytes (TILs) tend to localize to non-hypoxic tumor areas, suggesting a susceptibility to tumor-associated hypoxia. This led us to further study the effects of hypoxia in vitro by culturing spleen-derived mouse T cells in a humidified chamber at 0.5% O2, 5% CO2 and 37 °C. We found that T cell proliferation and effector function are reduced by hypoxia, severely affecting inflammatory cytokine production. …

Interpreting Minorness And Minor Characters In The Victorian Novel, Grace Pregent

Dissertations

An unprecedented and staggering wealth of characters floods the Victorian novel with its rich social representation of the nineteenth century. in reading these capacious narratives that seemingly accumulate objects, plots, and people, critics continuously privilege plot and minimize or dismiss the intricate participation of minor characters in the construction of meaning. Studies of literary characterization have classically struggled to articulate a theory of character that moves beyond reductive dichotomies€”flat or round, major or minor€”but that does not become inflated and cumbersome. Despite a lack of comprehensive critical attention, minor characters are no minor matter, and the brevity of their textual …

A Single Camera 360-Degree Real Time Vision-Based Localization Method With Application To Mobile Robot Trajectory Tracking, Khomsun Singhirunnusorn

Dissertations

This dissertation proposes a new method for real time vision-based localization in the full 360-degree area around a 3D reference object. In the past, Mirage pose estimation was developed for multi-camera systems. To achieve 360-degree localization with a single camera, we introduce the Mirage-S pose estimation method that uses a single camera given a 3D reference object as input. Mirage-S finds the solution by using an iterative numerical method with non-linear equations. This dissertation splits the localization problem into three parts: 360-degree 3D object recognition, 360-degree pose estimation, and 360-degree localization application. First, 360-degree 3D object recognition is required to …

A Measurable Cybersecurity Quality Framework And Its Application To The Department Of Transportation, Mohammad Shojaeshafiei

Dissertations

Numerous organizations are running businesses around the clock and have interaction with users through computer networks. The substantial issue here is that the organizations may not be able to assure the users that all operations can be performed completely securely while the users are engaged with the system’s operations. On a broader scale, the necessity of security assurance goes beyond business affairs such that lack of system security in organizations and agencies may endanger national security and public safety. All the records, research, and scientific studies show that it is almost impossible to guarantee all services and transactions on a …

A Virtual Cyber-Physical System Testbed For Use In Network Intrusion Detection And Prevention System Verification, Sueanne Nichole Griffith

Dissertations

In this work, the author presents research that will result in three contributions to the cybersecurity field. The first is a software model of a navigational lock based on the Sault St. Marie Locks. It is constructed with Matlab Simulink and open-source tools, using information available on existing systems and the government standards for lock construction. The second contribution is a methodology for use in comparing and testing intrusion detection and prevention systems. This includes the creation of a network data set, eleven network attacks to be used in testing, and criteria with which analyzed systems may be compared. Lastly, …

Music Notation-To-Color Synesthesia And Early Stages Of Music Education: A Grounded Theory Study, Eduardo Sola Chagas Lima

Dissertations

Problem

Synesthesia is a neurological condition characterized by over-abundant neural connectivity between commonly highly specialized areas of the brain. The developmental form of the condition often results in automatic and consistent cross-sensory associations between perceived stimuli and commonly unrelated brain regions. This research contemplates the specific form of music notation-to-color synesthesia and its impact on early stages of music education. Synesthetes with this mode of the condition tend to involuntarily yet consistently associate music-notational concepts with colors, thus rendering their assimilation of these concepts unique and individualized. The purpose of this study is to determine the extent of these individualized …

Mother-Infant Attachment: Path Analysis Of The Predictive Role Of Trauma Therapy And Select Demographics On Mother's Cognitive Responses, Nicole D. Knapp

Dissertations

Problem

The best outcome for attachment when an infant is born would be a secure attachment, but this is not always the case. Insecure attachments are likely to be formed when the mother has experienced domestic violence given the right environment (Huth-Bocks et al., 2011; Theran et al., 2005). A previous study showed that changes to attachment due to postnatal intervention are based on external behaviors rather than internal though processes (Theran et al., 2005). Because of this, the purpose of this study is to compare therapy categories and each of the observable attachment factors.

Method

Participants completed a survey …

Spiritual Coping As A Mediator Of Distress And Posttraumatic Growth Among Adult Female Survivors Of Sexual Abuse By Religious Leaders, Angela R. St. Hillaire

Dissertations

Problem

Posttraumatic growth has been defined as the positive psychological and behavioral changes that come about in the aftermath of a struggle with traumatic life events. The literature notes the existence of posttraumatic growth among survivors of intimate partner violence, childhood and/or adult sexual abuse, bereavement, terrorism, and other events. This study explored posttraumatic growth in a sample of female survivors of sexual abuse by religious leaders by examining how distress, spiritual coping, and posttraumatic growth were related in this population. This study examined the mediatory role of spiritual coping between distress and posttraumatic growth.

Method

Surveys that measured spiritual …

Ethnic Identity Salience, Socioeconomic Status, And Attitudes Toward Seeking Mental Health Treatment As Predictors Of Receptivity To Community-Based Psychoeducation Among African American Men, Hadiya Suzanne Dubose-Smith

Dissertations

Problem

Distrust and socioeconomic barriers are widely recognized as contributors to disparities in the healthcare system, particularly as it relates to mental health care (Lindinger-Sternart, 2015; National Alliance on Mental Illness, n.d.). African Americans continually experience societal pressures to disassociate with African American culture and to assimilate into mainstream culture. Perhaps accessing mental health services via a counselor is an extension of that pressure. In this way, the traditional counseling model for mental health intervention is a culturally counterintuitive approach for developing mental health among African American men. Men are a subset of the African American community that tends to …

Coaching And Being Coached: A Qualitative Study Of The Experiences Of Education Leaders In The Florida Conference Of Seventh-Day Adventists, Arne P. Nielsen

Dissertations

Problem

The Florida Conference of Seventh-day Adventists administration was concerned about its effectiveness as an evangelistic organization due to changes in societal norms. They felt a need for a paradigm shift to keep ministry relevant to its membership and to find new methods to reach people for Christ. There was an intentional focus on developing a model for effective ministry by equipping pastors and educators with new and different skills for the purpose of effecting personal and organizational transformation. For change to occur, it was decided to put in place a support system for leaders utilizing co-active coaching as the …

Selectivity For Allosteric Effectors Of Bacterial Adp-Glucose Pyrophosphorylase: Structural And Functional Studies, Mashael Alghamdi

Dissertations

The biosynthesis of the intracellular polysaccharide in bacteria and plants, glycogen and starch, respectively, controlled by the key regulatory step that catalyzed by ADP-Glucose Pyrophosphorylase (ADP-Glc PPase). ADP-Glc PPase is an allosteric enzyme regulated by metabolites produced of the principle carbon assimilation pathway in each organism. Agrobacterium tumefaciens enzyme activated by fructose 6-phosphate (Fru6P) and pyruvate, whereas Escherichia coli enzyme activated by fructose 1,6-bisphosphate (FBP), and both enzymes inhibited by AMP. Here, we targeted the allosteric regulation of the A. tumefaciens enzyme, examined some residues that may impact the regulation mechanism (Ser72, His71, Arg75, Ser351, Ser334, Arg368, Asn350, and Asp291), …