Digital Commons Network^™

Time-Dependent Deformation And Associated Failure Of Roof In Underground Mines, Yuting Xue

Graduate Theses, Dissertations, and Problem Reports (ETD)

In underground coal mines, roof falls are a major contributor to injuries and fatalities. Studies have related the occurrence of roof fall to weak immediate roof, high horizontal stress, entry orientation, etc. An often-neglected factor in studies on this topic has been the influence of time-dependent behavior of the roof rock on roof falls. The time-dependent roof failure activity involves both intact and failed rocks. Numerical simulation techniques are available that include time-dependent behavior; however, they lack constitutive models that consider both the intact and the failed behavior of rock. In addition, input properties for the creep models only include …

Investigation Of Bovine Conceptus Galectins And The Effect Of Bovine Conceptus Secretory Proteins On The Endometrial Epithelial Transcriptome, Heather Lynn Baldwin

Graduate Theses, Dissertations, and Problem Reports (ETD)

Pregnancy loss in cattle is greatest in the first 30 days of gestation. Near d15 of gestation, bovine conceptuses elongate and express LGALS1, an immunosuppressive glycan-binding protein believed to be essential for implantation. However, other members of the bovine galectin family, including LGALS3, LGALS4, LGALS7, LGALS8, LGALS9 and a galectin-13-like gene (LGALS13L), also may be expressed by the elongating conceptus. Therefore, galectin expression in elongating, d16 bovine conceptuses and intercaruncular endometrium as well as elongating, d14 ovine conceptuses and intercaruncular endometrium was assessed by RT-qPCR. Angus heifer and Texel ewes underwent estrous cycle synchronization and either inseminated or not bred. …

Immunity-Based Framework For Autonomous Flight In Gps-Challenged Environment, Mohanad Al Nuaimi

Graduate Theses, Dissertations, and Problem Reports (ETD)

In this research, the artificial immune system (AIS) paradigm is used for the development of a conceptual framework for autonomous flight when vehicle position and velocity are not available from direct sources such as the global navigation satellite systems or external landmarks and systems. The AIS is expected to provide corrections of velocity and position estimations that are only based on the outputs of onboard inertial measurement units (IMU). The AIS comprises sets of artificial memory cells that simulate the function of memory T- and B-cells in the biological immune system of vertebrates. The innate immune system uses information about …

Beneath The Gypsum Dunes: Cenozoic History Of Wind And Water From A Core Drilled At White Sands, New Mexico, Jackson Bentley Jakeway

Graduate Theses, Dissertations, and Problem Reports (ETD)

White Sands, New Mexico is the largest gypsum dune field on planet Earth, the result of reworking of gypsum deposits. The dunes have been well studied, but the Cenozoic history preceding the formation of the dune field has been poorly studied. A core drilled to a depth of 192 ft (58.5 m) beneath the modern dune field contains deposits from saline lakes, sandflats, perennial freshwater lakes, perennial brackish to saline lakes, and saline mudflats.

The core is composed of bottom-growth bedded gypsum, gypsum sandstone and siltstone, mixed siliciclastic-gypsum sandstones and siltstones, laminated siliciclastic mudstones, gypsum mudstones, and carbonate mudstones. Bottom-growth …

Internalized Heterosexism, Outness, Athletic Identity, And Perceived Stress Among Queer Female Athletes, Olivia C. Scott

Graduate Theses, Dissertations, and Problem Reports (ETD)

The historical presence of heterosexism in sport has been discussed in numerous publications, with unique considerations for female athletes (Anderson, Magrath, & Bullingham, 2016; Cahn, 1993; Griffin, 1998; Rankin, 1998). Unfortunately, few studies have examined the impact of this climate on female athletes with minoritized sexual identities. Most research pertaining to this population has been qualitative and largely focused on lesbian athletes (Fynes & Fisher, 2016; Stoelting, 2011). Consequently, more generalizable conclusions about queer female athlete experiences has been limited. The present study was an attempt to address this research gap, by assessing the internalized heterosexism, outness, athletic identity, and …

Optimal Compression Of Point Clouds, Benjamin Robert Smith

Graduate Theses, Dissertations, and Problem Reports (ETD)

Image-based localization is a crucial step in many 3D computer vision applications, e.g., self-driving cars, robotics, and augmented reality among others. Unfortunately, many image-based-localization applications require the storage of large scenes, and many camera pose estimators struggle to scale when the scene representation is large. To alleviate the aforementioned problems, many applications compress a scene representation by reducing the number of 3D points of a point cloud. The state-of-the-art compresses a scene representation by using a K-cover-based algorithm. While the state-of-the-art selects a subset of 3D points that maximizes the probability of accurately estimating the camera pose of a new …

Leveraging Writing And Photography Styles For Drug Trafficker Identification In Darknet Markets, Wei Song

Graduate Theses, Dissertations, and Problem Reports (ETD)

Due to its anonymity, there has been a dramatic growth of underground drug markets hosted in the darknet (e.g., Dream Market and Valhalla). To combat drug trafficking (a.k.a. illicit drug trading) in the cyberspace, there is an urgent need for automatic analysis of participants in darknet markets. However, one of the key challenges is that drug traffickers (i.e., vendors) may maintain multiple accounts across different markets or within the same market.

To address this issue, in this thesis, we propose and develop an intelligent system named uStyle-uID leveraging both writing and photography styles for drug trafficker identification at the first …

A Sociopolitical Perspective To Understand When And Why Supervisors Endorse And Implement Employees’ Suggested Changes, Huaizhong Chen

Graduate Theses, Dissertations, and Problem Reports (ETD)

When employees make suggestions for changes to their supervisors, they are providing raw materials potentially critical to the organization’s continuous improvement and adaptation. However, research suggests that supervisors do not always react favorably to employee voice behavior. The purpose of this study is to unravel the mediating and moderating mechanisms that can explain when and why employee voice behavior leads to supervisor endorsement and implementation. Specifically, taking a sociopolitical perspective, I argued that supervisor motive attributions for employee voice behavior can explain the extent to which supervisors endorse and subsequently implement employee voice. Furthermore, I argued that the mediating effects …

Untangling The Reciprocal Relation Of The Behavioral And Physiological Immune Systems, Baris Sevi

Graduate Theses, Dissertations, and Problem Reports (ETD)

In the past decade, there has been an exponential increase in the study of the Behavioral Immune System (BIS), a suite of psychological processes that serves an infectious disease avoidance function. The BIS is proposed to be inherently intertwined with the physiological immune system. However, very few studies have actually demonstrated this fundamental, theoretical assumption. The purpose of this thesis was to test the possible relation between the physiological and behavioral immune systems in two studies. In Study 1 (N = 388), the relation between implied activation of the physiological immune system and BIS sensitivity was examined. Participants who reported …

Eyewitness Memory Recall In Adolescents With Callous-Unemotional Traits, Benjamin Dylan Thomas

Graduate Theses, Dissertations, and Problem Reports (ETD)

Individuals with high levels of psychopathic traits have been portrayed as having higher intelligence and better memory (Cleckley, 2015). In terms of developmental pathways for psychopathy, the strongest predictor of children and adolescents developing psychopathic traits in adulthood is high levels of callous-unemotional (CU) traits in childhood (Burke et al, 2007; Frick, 2009). Research has been mixed with regard to links between CU or psychopathic traits and memory performance in children and adults, with some studies finding that individuals with high levels of these traits demonstrated poorer memory performance (Bauer & Hesselbrock, 2001; Dolan & Fullam, 2005). This study examined …

Character Morality, Enjoyment, And Appreciation: A Replication Of Eden, Daalmans, And Johnson (2017), Koji Yoshimura

Graduate Theses, Dissertations, and Problem Reports (ETD)

Much research on media entertainment seeks to explain why viewers enjoy and appreciate a variety of media content. Affective disposition theory suggests that media enjoyment results from perceptions of the morality of characters and viewers’ expectations for characters’ narrative outcomes. However, research has struggled to explain how characters with varying morality (i.e., not perfectly good or bad) entertain viewers. This study replicates a previous study conducted by Eden, Daalmans, and Johnson (2017) that investigated different types of morally ambiguous characters, using a typology of character types based on an online, collaboratively sourced typology.

Like the original study, this study found …

Occupational Fraud: Executive Compensation And Enforcements Against Auditors And Perpetrators., Erlina Papakroni

Graduate Theses, Dissertations, and Problem Reports (ETD)

This dissertation is comprised of three studies that examine the association of executive compensation with financial statement fraud and enforcements pursued against the independent auditor and the principal perpetrators when occupational fraud is detected.

The first study examines competing, though non-mutually exclusive, hypotheses for the path that equity compensation follows on its way to financial misreporting. We find that firms that experience financial statement fraud pay their executives higher levels and a higher proportion of equity compensation across the entire executive’s tenure. This starts in the first year of an executive’s tenure and continues up until the fraud period. These …

Behavioral And Anti-Inflammatory Effects Of Magl Inhibition In A Mouse Model Of Inflammatory Arthritis, Floyd Franklin Steele Iii

Graduate Theses, Dissertations, and Problem Reports (ETD)

Cannabinoids have analgesic and anti-inflammatory properties. For example, in preclinical models of acute inflammatory pain, cannabinoid receptor subtype 2 (i.e., CB_2, Table 1) agonists decrease paw inflammation and resulting pain. Yet, the anti-inflammatory properties of cannabinoid receptor manipulation in chronic inflammatory pain states are unknown. Monoacylglycerol lipase (MAGL) is the primary catabolic enzyme of the endocannabinoid (i.e., endogenous cannabinoid ligand) 2-arachidonoyl glycerol (i.e., 2-AG). Compounds that inhibit MAGL indirectly increase tissue levels of 2-AG by preventing its catabolism. MAGL inhibitors demonstrate efficacy in acute models of inflammatory/rheumatic disease. Thus, in this study, the MAGL inhibitor JZL184 was tested …

Distribution And Habitat Use Of Benthic Fishes In The Lower Kanawha River, West Virginia, Nathaniel V. Owens

Graduate Theses, Dissertations, and Problem Reports (ETD)

The Kanawha River in West Virginia is a historically diverse system in terms of ichthyofauna although, like many other large rivers, it has been subjected to a suite of anthropomorphic perturbations. These include this system being modified to allow the passage of commercial vessels for industry thus altering flow regimes, increased sedimentation, water depth, and channelization, and decreased interactions with its floodplain. Additionally, the fishes of this system have suffered from deleterious historical water quality issues caused by intensive timber operations, mining, and industrial waste. Post Clean Air Act, Clean Water Act, and Surface Mining Control and Reclamation Act water …

Photoluminescent Zirconium Complexes For Visible Light Photoredox Catalysis, Yu Zhang

Graduate Theses, Dissertations, and Problem Reports (ETD)

Early transition metals like zirconium are attractive candidates for the design of luminescent molecules based on earth-abundant elements. Here, a series of zirconium complexes carrying two pyrrolyl-based ligands have been synthesized and characterized. These complexes are photoluminescent upon excitation with visible light and exhibit remarkably long emission lifetimes of hundreds of μs in solution at room temperature. Computational studies using time-dependent density functional theory (TD-DFT) were conducted to identify the nature of the luminescent excited states as mixed intra-ligand/ligand-to-metal charge-transfer (ILCT/LMCT) states. The electrochemistry studies revealed multiple reversible redox events for each zirconium complex. Furthermore, the excited state of the …

Choose Your Own Lecture: Students’ Motivational Resources As A Consequence Of Autonomy-Supportive Instruction, James P. Baker

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this dissertation was to extend the self-determination theory literature by investigating the utility of the choose your own lecture method of instruction. This method of instruction allows students to control the direction of a lesson. In line with the theoretical propositions of SDT, the researcher hypothesized that this style of teaching would support students’ inner motivational resources (i.e., autonomy-need satisfaction and intrinsic motivation) and in turn, foster students’ interest in the topic of the lesson, free-choice persistence, cognitive learning, affect for the course, and expressive dissent. A 50-minute live-lecture experiment on environmental communication (climate change, risk communication, …

Factors Influencing Survival, Productivity, And Population Growth Of Eastern Wild Turkeys In Northeastern South Dakota, Reina M. Tyl

Graduate Theses, Dissertations, and Problem Reports (ETD)

The population of eastern wild turkeys in northeastern South Dakota appeared to be expanding soon after reintroduction in the 1990s, however, recent harvest trends suggest declining abundance in the region. Spring turkey hunting expenditures are projected to be around $6.5 million in South Dakota, with about $3 million of those expenditures occurring within the northeastern prairie region. However, the number of birds harvested during the spring prairie firearm season has been declining since 2010. Due to concerns about a declining population, the autumn hunting season was closed in 2014. The cause of the apparent decline is unclear. Updated demographic information …

Using Lidar To Approximate Keystone Structure And Evaluate Management Practices In Potential Habitats Of The Endangered Karner Blue Butterfly (Lycaeides Melissa Samuelis), Brandyn Balch

Graduate Theses, Dissertations, and Problem Reports (ETD)

Keystone structure is the spatial structure required by a given species, at a scale that is determined by that species’ needs and mobility. The endangered Karner blue butterfly (Lycaeides melissa samuelis, hereafter KBB) has a keystone structure that incorporates trees and bushes to provide the mixture of sun and shade required to fulfil its life functions. Airborne light detection and ranging (lidar) is a potentially invaluable tool for characterizing keystone structures. However, lidar has yet to be utilized to evaluate structural suitability of KBB habitats. Therefore, I investigated the use of lidar for characterizing critical attributes of KBB habitat structure, …

Bending Response Of Timber Mortise And Tenon Joints Reinforced With Filler-Modules And Frp Gussets, Andrew Robert Pacifico

Graduate Theses, Dissertations, and Problem Reports (ETD)

In 2013, the California Bay Area (CBA) passed a set of ordinances to ensure that their 10,000 plus timber soft-story buildings were prepared for seismic events, through nondestructive evaluation methods. Many property owners are searching for an affordable retrofitting system that will also meet CBA’s new laws focusing on installations by the mandated deadlines in 2020. Over the past three to four decades, Fiber Reinforced Polymer (FRP) composites have found their way into the civil infrastructure sector for rehabilitation. The objective of this study is to evaluate the bending behavior retrofitted mortise and tenon timber joints reinforced with engineered wood …

The Potential Promises And Pitfalls Of Using Local Norms For Gifted Identification, Marla S. Hartman

Graduate Theses, Dissertations, and Problem Reports (ETD)

Who are the gifted? This question has plagued the field since its inception. Historically, gifted education has been predicated on the values of the Caucasian, upper- to middle-class majority. As a result, underrepresentation of students from economically disadvantaged and culturally diverse families have been well documented in the literature and continues to this day. Some scholars have suggested the use of expanded definitions of giftedness to increase participation of students from underrepresented segments of the population. This study used regression and hierarchical linear models to predict the proportion of students identified across various thresholds focusing on how definitions impacted differential …

The Dirt Of Development: Nature's Role In Social-Emotional Development And Parent-Child Connectedness, Hayley Johanna Lindsey

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this study was to examine associations between nature connectedness, parent-child connectedness, and the development of prosocial behavior. Nature connectedness pertains to the strong emotional affinity towards the natural environment and is linked with happiness, stress reduction, and good health. Prosocial behavior refers to actions or behaviors done with the intent to help others. This study consisted of 467 parent-informants that gathered information on the parent’s nature connectedness, the child’s nature connectedness, the parent-child connectedness, and the child prosocial behavior. Gaps in the literature were addressed by analyzing the role that parent nature connectedness has in predicting child …

Mandarin -Guo Under Control: An Experimental Study, Wei Zhou

Graduate Theses, Dissertations, and Problem Reports (ETD)

This thesis examines the experiential aspectual marker -guo under control in Mandarin. The status of -guo under control has been a subject of controversy, involving two important theoretical questions. The first question concerns whether -guo under control is syntactically associated with the matrix verb or the embedded verb. The second question deals with whether, in terms of interpretive effects, -guo under control triggers actuality entailments. This thesis addresses the latter question through an interpretive judgment test conducted among 260 native Mandarin speakers. In the test, three control verbs (changshi ‘try’, guli ‘encourage’, and zuzhi ‘oppose’) were selected, each of …

The Environmental, Social, And Economic Benefits Of Blue Green Infrastructure In An Urbanized Area, Joseph L. Oguns

Graduate Theses, Dissertations, and Problem Reports (ETD)

At present, it is evident that there is a shift from rural to an urban settlement which results in high demand for residential buildings and other urban infrastructure. Blue – Green Infrastructure (BGI) is a system of using blue (water) and green (nature) to address urban and environmental challenges. The purpose of this study is to evaluate the environmental, social, and economic benefits of blue-green infrastructure in an urbanized area in Pittsburgh, Pennsylvania, USA. The study involves the utilization of Geographic Information System (GIS) to determine water quality level resulting from nonpoint source pollution through acquiring elevation data; watershed; and …

Shame And Guilt: The Good, The Bad, And The Ugly, Raika Sadeghein

Graduate Theses, Dissertations, and Problem Reports (ETD)

In the past few decades, we have witnessed a growing body of literature on emotions in the consumer behavior domain. Emotions are defined as “mental states of readiness that arise from appraisals of events or one’s own thoughts” (Bagozzi, Gopinath, & Nyer, 1999, p. 184). Marketers have examined the role of emotions as stimuli, mediators, moderators, and responses to the environment. The broad topic of emotions includes subtopics such as impact of emotions on consumption, attitudes, and behavioral intentions, emotional responses to market stimuli, and the impact of emotions on cognition. However, although the study of emotions is pivotal to …

The Impact Of Student Facilitation On Student Engagement In Asynchronous Online Discussion, Robin Bowen

Graduate Theses, Dissertations, and Problem Reports (ETD)

Lack of engagement in asynchronous online discussion is a common issue due to insufficient participation, disinterest in discussion, superficial discussion, and the influence of peer behaviors. The purpose of this study was to enhance student engagement in asynchronous online discussion by using student-led discussion and peer assessment. A mixed methods design was utilized in this study to offset quantitative and qualitative research weaknesses and to draw on the strengths of both (Plano Clark & Creswell, 2008). The control group participated in the discussion managed by the instructor, who posted weekly discussion questions to a class discussion board and facilitated the …

Elucidating A Common Mechanism Of Proteasome Impairment In Neurodegenerative Disease And Its Pharmacological Intervention, Tiffany Ann Thibaudeau

Graduate Theses, Dissertations, and Problem Reports (ETD)

Proteostasis is maintained by several systems in the cell including the ubiquitin-proteasome system (UPS), chaperones, chaperone-mediated autophagy, and macroautophagy. The UPS is the principle route for the degradation of intracellular misfolded, damaged, or unneeded cellular proteins and has a critical role essential every cell process, including: cell cycle progression, transcriptional regulation, genome integrity, apoptosis, immune responses, and neuronal plasticity. When the efficiency of protein degradation is perturbed, misfolded and damaged protein aggregates can accumulate to toxic levels and cause neuronal dysfunction, which may underlie many neurodegenerative diseases. It is widely appreciated that soluble oligomers of misfolded proteins (e.g. Aβ, Alzheimer’s; …

Design And Implementation Of An Instantaneous Fuel Mass Flow Measurement System For Use In Verification Of Locomotive Emissions, Adam Wayne James

Graduate Theses, Dissertations, and Problem Reports (ETD)

Located in Altoona, PA, the Juniata Thoroughbred Emissions Research lab has provided emissions testing and research for several locomotive companies such as CSX, Electro Motive Diesel (EMD), and General Electric (GE). The emissions laboratory measures locomotive emissions through partial flow dilution (PFD) sampling for particulate matter (PM) using a Sierra Instruments BG3 and measures raw gaseous emissions using a MEXA 7100D gaseous emission analyzer. Fuel consumption is measured on a gravimetric basis and is used in verification of proportional sampling of exhaust flow. There were two research goals for this study which were (1) verify that the emissions measurement system …

Accessible Design In Rural Health Care: Usability Profile Of Outpatient Health Care Facilities In Rural West Virginia., Jordan E. Miller

Graduate Theses, Dissertations, and Problem Reports (ETD)

The Americans with Disabilities Act (ADA) became law in 1990. Since then, research has shown that people with disabilities continue to experience environmental, systematic, and structural barriers to health care. The purpose of this research is to explore the prevalence of barriers in rural West Virginia health facilities and the relationship between building characteristics (like age and purpose) and accessibility. The researcher evaluated ten rural outpatient member-sites of the West Virginia Practice-Based Research Network using a survey to understand building characteristics and a tool to measure essential features for a facility to be considered ‘usable’. Findings included a negative correlation …

Artifacts Of Imagination, Rachel Emily Simpson

Graduate Theses, Dissertations, and Problem Reports (ETD)

My MFA thesis and supporting exhibition focus on works ranging from video and sculpture to installation. The work has evolved from an intimate spiritual dialogue and interaction with the terrestrial world. This personal narrative is a jumping off point to pursue more universal themes and ideas of layering of information, shared versus collective perceptions and creating systems of understanding. Many of the processes involved in this exhibition contain some form of collage. The use of these various collage techniques furthers the idea of complexity in perception and expression and the many layers of experience. I will explain how the creation …

The Structural Information Filtered Features Potential For Machine Learning Calculations Of Energies And Forces Of Atomic Systems., Jorge Arturo Hernandez Zeledon

Graduate Theses, Dissertations, and Problem Reports (ETD)

In the last ten years, machine learning potentials have been successfully applied to the study of crystals, and molecules. However, more complex materials like clusters, macro-molecules, and glasses are out reach of current methods. The input of any machine learning system is a tensor of features (the most universal type are rank 1 tensors or vectors of features), the quality of any machine learning system is directly related to how well the feature space describes the original physical system. So far, the feature engineering process for machine learning potentials can not describe complex material. The current methods are highly inefficient …