Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

2015

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 25261 - 25290 of 27534

Full-Text Articles in Entire DC Network

Sports Investment, Beliefs About Food-Related Behaviors, And Engagement In Problematic Eating Behaviors During Adolescence, Kaitlyn A. Ferris Jan 2015

Sports Investment, Beliefs About Food-Related Behaviors, And Engagement In Problematic Eating Behaviors During Adolescence, Kaitlyn A. Ferris

Graduate Theses, Dissertations, and Problem Reports (ETD)

Involvement in sport is the most widely reported organized activity among children and adolescents. To date, organized sports also represent the only organized activity examined in conjunction with youths' eating behaviors. Organized sports serve as contexts where messages about healthy eating and body image are communicated, and adolescents' beliefs about food and their bodies' degree of thinness and muscularity has the potential to be amplified in such settings as youth strive to perform at high levels during athletic competitions. However, inconsistency in the measurement of both organized sports participation and adolescents' engagement in problematic under- and over-eating behaviors has resulted …

Go to article

First Year Sprouting And Growth Dynamics Of Northern Red Oak, Yellow-Poplar, Red Maple, And Sweet Birch On A Mesic Site Following A Release Burn During A "Shelterwood-Burn" Sequence, Maria Adele Fenwick Jan 2015

First Year Sprouting And Growth Dynamics Of Northern Red Oak, Yellow-Poplar, Red Maple, And Sweet Birch On A Mesic Site Following A Release Burn During A "Shelterwood-Burn" Sequence, Maria Adele Fenwick

Graduate Theses, Dissertations, and Problem Reports (ETD)

Oak regeneration challenges are a widespread issue across the mixed oak and mixed mesophytic forests of the eastern United States. Following disturbance on many mesic and sub-mesic sites oaks are being replaced by faster growing or shade tolerant species. There are many contributing factors, but one thought to have the strongest influence is attributed to the effects of 20th century fire suppression. For millennia fire was an integral part of oak dominated ecosystems and is thought to have contributed to and perpetuated oak's importance in these forests. During the 20th century the frequency and spatial scale of fire was severely …

Go to article

Influence Of Mycorrhizal Fungi On Soil Geochemistry And Plant Uptake Of Cadmium And Zinc: Greenhouse And Soil Studies Of Palmerton Zinc Superfund Site, Pennsylvania, U.S.A, Christian X. Figueroa Jan 2015

Influence Of Mycorrhizal Fungi On Soil Geochemistry And Plant Uptake Of Cadmium And Zinc: Greenhouse And Soil Studies Of Palmerton Zinc Superfund Site, Pennsylvania, U.S.A, Christian X. Figueroa

Graduate Theses, Dissertations, and Problem Reports (ETD)

The application of bioremediation as a means to ameliorate potentially toxic metals from contaminated soils has been on the forefront of sustainable technologies in the field of environmental studies. Conventional methods available for soil remediation are employed in both in situ or ex situ and these are: soil flushing, solidification/stabilization, vitrification, electrokinetics, chemical reduction/oxidation, soil washing, and excavation. In general, these technologies are limited by their applicability to small areas and the high costs to execute. The use of biota, in particular fungi and trees, has been an emerging low-cost and "environmentally-friendly" alternative to conventional technologies. In this study, I …

Go to article

Dimensions Of Political Reasoning: Associations Among Informational Assumptions, Sociopolitical Values, And Domain-Specific Judgments About Laws, Benjamin Oosterhoff Jan 2015

Dimensions Of Political Reasoning: Associations Among Informational Assumptions, Sociopolitical Values, And Domain-Specific Judgments About Laws, Benjamin Oosterhoff

Graduate Theses, Dissertations, and Problem Reports (ETD)

Adolescents' beliefs about laws are a critical component of their emerging political reasoning, which is hypothesized to guide political decisions in adulthood. Laws serve a variety of purposes by restricting certain social behaviors. However, little is known about the types of laws adolescents view as important and obligatory to obey, or the amount of punishment that should be received for breaking different laws. Identifying individual differences in these beliefs may help elucidate the developmental origins of political attitudes. Therefore, the current study had three primary goals. The first goal was to utilize social domain theory to assess adolescents' judgments and …

Go to article

Kriging-Based Design Of Experiments For Multi-Source Exposure-Response Studies In Nanotoxicology, Ying Pei Jan 2015

Kriging-Based Design Of Experiments For Multi-Source Exposure-Response Studies In Nanotoxicology, Ying Pei

Graduate Theses, Dissertations, and Problem Reports (ETD)

One of the major challenges with toxicology studies of nanomaterials (NMs), compared to traditional materials or chemicals, lies in the large NM variety (or sources) caused by their various physico-chemical properties. How to efficiently design multi-source biological experiments for the toxicity characterization of NMs in terms of their exposure-response profiles? This work intends to address this question by a two-stage experimental design procedure, which is developed based on the statistical model, stochastic kriging with qualitative factors (SKQ). With a given experimental budget, the SKQ-based design method aims at achieving the highest-quality SKQ, which synergistically models the exposure-response data from multiple …

Go to article

An Examination Of Households' Willingness-To-Pay For Wetlands Biodiversity Conservation In The United States: A Benefit Transfer Approach, Rajendra Prasad Poudel Jan 2015

An Examination Of Households' Willingness-To-Pay For Wetlands Biodiversity Conservation In The United States: A Benefit Transfer Approach, Rajendra Prasad Poudel

Graduate Theses, Dissertations, and Problem Reports (ETD)

This research paper provides a benefit transfer model of willingness-to-pay (WTP) for wetlands' biodiversity conservation in the United States. The validity of the estimated wetland's willingness-to-pay values is also examined. While valuation of the services provided by wetlands may be challenging due to their non-market nature, estimation of values is important. Conducting a primary study is the best option for precise results. However, researchers may recommend the benefit transfer approach in wetland valuation when there are limited time, budgetary constraints, and administrative urgency.;The benefit transfer approach involves transferring of value estimates from study sites (where research was already undertaken) to …

Go to article

The Learningweb Revolution And The Transformation Of The School By Leonard J. Waks, Helen Crompton Jan 2015

The Learningweb Revolution And The Transformation Of The School By Leonard J. Waks, Helen Crompton

Teaching & Learning Faculty Publications

On examination of the book’s cover, I believed the images and title would be leading me into reading surface level facts about how technology can be used to support education. I was very wrong. This book was designed to deliver a strong message to all stakeholders in education. Leonard Waks has written this book to present a new type of educational organization as an alternative to the high school system that is in place in the North America today. He clearly states that his ideas do not attempt to fix the broken model, but he strongly advocates for a completely …

Go to article

The Relationship Between Mobile Learning, Instructional Delivery, And Student Motivation In A Large Undergraduate Science Class, Kristen H. Gregory, Helen Crompton Jan 2015

The Relationship Between Mobile Learning, Instructional Delivery, And Student Motivation In A Large Undergraduate Science Class, Kristen H. Gregory, Helen Crompton

Teaching & Learning Faculty Publications

Science learning at the early undergraduate level provides a challenging context with large classes and many complex topics to unpack with the students. The purpose of this qualitative study was to explore: how students use mobile devices for learning in a large, undergraduate classroom; what types of instructional delivery could be used with the devices in this context; and if students were motivated to learn. Classroom observations and semi-structured interviews with the professor were reported and five patterns emerged from these data: connected, personal, multimodal, engaged, and class management. From the overall findings of these data, it would appear that …

Go to article

Factor Graphs And Submap Simultaneous Localization And Mapping For Microbathymetry, James Ian Vaughn Jan 2015

Factor Graphs And Submap Simultaneous Localization And Mapping For Microbathymetry, James Ian Vaughn

Open Access Dissertations

The utility of high-resolution bathymetric surveys important to many problems in oceanography is often limited by the poor navigation options available to Unmanned Underwater Vehicles. This thesis presents a novel method to integrate conventional dead-reckoning navigation with recent advances in factor graph Simultaneous Localization and Mapping (SLAM) algorithms. Dead-reckoning is represented in the factor graph as a new type of factor using a linearized state transition model derived from the Extended Kalman Filter commonly used for dead reckoning. The new factor graph submap-SLAM is faster and more scalable than prior methods and is shown to properly represent navigation uncertainty. This …

Go to article

Stat4 Regulates Multiple Pathogenic Mechanisms Of Cd4 T Cells In Experimental Autoimmune Encephalomyelitis, A Model Of Multiple Sclerosis, Ian Lee Mcwilliams Jan 2015

Stat4 Regulates Multiple Pathogenic Mechanisms Of Cd4 T Cells In Experimental Autoimmune Encephalomyelitis, A Model Of Multiple Sclerosis, Ian Lee Mcwilliams

All ETDs from UAB

Multiple Sclerosis (MS) is an autoimmune disease whereby the host immune system fails to recognize self vs non-self and targets myelin of the central nervous system. Currently there is no permanent cure for MS and the efficacy of immune modulatory treatments often wane over time, therefore we seek to determine novel pathogenic mechanisms to target therapeutically. CD4 T cells have been found within inflammatory CNS lesions of MS patients and are believed to be important mediators of MS pathology. To study CD4 T cells in the context of MS, we use the well-defined MS mouse model experimental autoimmune encephalomyelitis (EAE). …

Go to article

The Interrelationships Among Obesity, Insulin Sensitivity, And Bone Phenotype In Pre-Pubertal Girls, Anna L. Newton Jan 2015

The Interrelationships Among Obesity, Insulin Sensitivity, And Bone Phenotype In Pre-Pubertal Girls, Anna L. Newton

All ETDs from UAB

Impaired insulin sensitivity as a consequence of childhood obesity has been implicated as a contributor to skeletal fragility. There is a need to understand the interrelationships among insulin sensitivity and skeletal parameters (i.e. cortical, trabecular, marrow) in obesity during the pubertal transition. Further, calorie restricted weight loss to stabilize these relationships warrants investigation as well. The goal of this project was to examine the relationships among body composition, skeletal parameters, and insulin sensitivity. The first aim was to evaluate the relationships among total body fat, bone mineral content (BMC) and femoral bone marrow adipose tissue (BMAT) during childhood and underlying …

Go to article

The Role Of Stress And Motivation In Problematic Smartphone Use Among College Students, Jin-Liang Wang, Hai-Zhen Wang, James Gaskin, Li-Hui Wang Jan 2015

The Role Of Stress And Motivation In Problematic Smartphone Use Among College Students, Jin-Liang Wang, Hai-Zhen Wang, James Gaskin, Li-Hui Wang

Faculty Publications

Although numerous studies have examined factors that influence problematic smartphone use, few have investigated the interactions between different types of motivation and psychosocial well-being factors in facilitating problematic smartphone use. Thus, this study analyzed the moderating role of perceived stress on the relationship between entertainment or escapism motivation and problematic smartphone use. Using a sample of 600 typical smartphone users (Chinese college students) we found: (1) Perceived stress moderates the relationship between entertainment motivation and problematic smartphone use, and between escapism motivation and problematic smartphone use among users scoring high on problematic use; (2) perceived stress moderated the relationship between …

Go to article

Copper-Mediated Oxidative Decarboxylative Coupling Reactions: Trifluoromethylation Of Heteroarene C-H Bonds With Trifluoroacetic Acid As The Cf3 Source And C-H Arylation Of Benzoxazoles With Benzoic Acids, Lin Ju Jan 2015

Copper-Mediated Oxidative Decarboxylative Coupling Reactions: Trifluoromethylation Of Heteroarene C-H Bonds With Trifluoroacetic Acid As The Cf3 Source And C-H Arylation Of Benzoxazoles With Benzoic Acids, Lin Ju

Graduate Theses, Dissertations, and Problem Reports (ETD)

Compared with the prefunctionalized substrates in traditional cross-coupling reactions, carboxylic acid derivatives are easier to handle and commercially available in a broad scope, making them ideal starting materials to build biaryl structures. Copper has been demonstrated to decarboxylate carboxylic acids. There are also several examples of copper-mediated oxidative coupling reactions with two nucleophilic components. However, the copper-mediated direct C-H trifluoromethylation and arylation of heteroarenes with trifluoroacetic acid and benzoic acids is still challenging.;This thesis is divided into three chapters. Chapter I and Chapter II will describe copper-mediated oxidative decarboxylative trifluoromethylation of C-H bonds, including heteroarenes and arenes bearing a directing …

Go to article

The Role Of Dynorphin In The Onset Of Puberty In Female Lambs, Justin Angelo Lopez Jan 2015

The Role Of Dynorphin In The Onset Of Puberty In Female Lambs, Justin Angelo Lopez

Graduate Theses, Dissertations, and Problem Reports (ETD)

The neural mechanisms underlying the onset of puberty are not well understood. In sheep, this process involves an increase in GnRH release due to decreased sensitivity to estrogen feedback. Because GnRH neurons do not express the relevant estrogen receptors, this pathway must contain interneurons. Neurons in the arcuate nucleus (ARC) of the hypothalamus that co-express kisspeptin (Kiss), neurokinin B, and dynorphin (DYN), i.e. KNDy neurons, play a critical role. Based on previous data, the overall hypothesis is that the prepubertal hold in GnRH/LH release results from reduced Kiss stimulation and heightened DYN inhibition in response to estrogen negative feedback. Two …

Go to article

New Methods For Copper-Catalyzed Decarboxylative C-H Arylation Reactions, Lijun Chen Jan 2015

New Methods For Copper-Catalyzed Decarboxylative C-H Arylation Reactions, Lijun Chen

Graduate Theses, Dissertations, and Problem Reports (ETD)

Metal-catalyzed cross-coupling reactions have become a powerful tool to construct unsymmetric biaryl structures. Traditional cross-coupling requires prefunctionalized coupling partners, resulting in poor atom- and step-economy. As an alternative, carboxylic acids are attractive coupling precursors after the release of carbon dioxide. Carboxylic acids are readily available in a wide scope and easily stored and handled. Over the past decade, work has been performed on developing new methods for metal catalyzed redox neutral decarboxylative coupling reactions with benzoic acids. However, redox neutral decarboxylative coupling reactions require a prefunctionalized aryl halide or aryl triflate coupling partner. Alternatively, oxidative decarboxylative cross-coupling enables direct C-H …

Go to article

Development Of Graphene And Graphene-Nanoparticle Composites For Sensor Applications, Saurabh Chaudhari Jan 2015

Development Of Graphene And Graphene-Nanoparticle Composites For Sensor Applications, Saurabh Chaudhari

Graduate Theses, Dissertations, and Problem Reports (ETD)

The goal of this research was the synthesis of graphene and graphene nanocomposite for use as sensor materials. This dissertation describes the optimization of a novel approach to the synthesis of few layer graphene films on SiC, the modification of the graphene surface by wet chemical methods, the nucleation of nanoparticles to form graphene-nanoparticle composites, the fabrication of chemoresistive sensor structures from these materials, and the characterization of these surfaces and films.;In this work, the basic graphene synthesis method which uses halogen based plasma etching and ultra-high vacuum annealing (UHVA), has been optimized to reliably produce one, two, and three …

Go to article

Propagating Precipitation Waves In Hydrogels, Darrell Collison Jan 2015

Propagating Precipitation Waves In Hydrogels, Darrell Collison

Graduate Theses, Dissertations, and Problem Reports (ETD)

In 1896, Raphael E. Liesegang discovered that precipitation reactions may produce striking precipi- tation rings and bands. More than a century later, propagating precipitation waves were discovered in similar reactions. The bands and rings discovered by Liesegang are static, but traveling precipitation waves exhibit complex spatiotemporal dynamics. Traveling waves are widespread and occur in both living and nonliving systems. Examples include calcium waves propagating through Xenopus laevis oocytes, cyclic AMP waves in colonies of Dictyostelium discordium cells, and spiral waves in propagating flames fronts. Recently, traveling waves were identified in a precipitation reaction involving AlCl3 and NaOH. The propagating precipitation …

Go to article

Effects Of Protein Supplementation On Parasitism And Growth In Grazing Lambs, Crista Crawford Jan 2015

Effects Of Protein Supplementation On Parasitism And Growth In Grazing Lambs, Crista Crawford

Graduate Theses, Dissertations, and Problem Reports (ETD)

Controlling gastrointestinal nematode infection of sheep has become a challenge resulting from reduced anthelmintic efficacy. Previous data have indicated that grazing lambs supplemented with a 16% CP ration at 1% BW maintained growth comparable to lambs given anthelmintic despite greater infection. Thus the objective of the following studies was to determine the effects of bypass protein on fecal egg count reduction and post weaning growth in parasitized, grazing lambs. Experiment one utilized spring-born Suffolk crossbred lambs separated into 3 supplement groups: alfalfa pellets (AFP) (15% CP), corn and soybean meal (CSM) (19% CP) and corn, soybean meal and fish meal …

Go to article

Evaluation Of The Effectiveness Of Recovery Methods Of Trace Evidence For Pollen Particles, Christie Cyktor Jan 2015

Evaluation Of The Effectiveness Of Recovery Methods Of Trace Evidence For Pollen Particles, Christie Cyktor

Graduate Theses, Dissertations, and Problem Reports (ETD)

Within the forensic science community, pollen as a form of trace evidence is extremely underutilized. In many instances, trace evidence examiners and crime scene investigators are unfamiliar with how best to recover pollen from a piece of evidence. Methods such as vacuum sweeping, tape lifting, and sonication have been implemented for the recovery of the test dust from materials such as clothing, shoes, or improvised explosive devices. While these methods are known to be beneficial with some trace materials, their effectiveness with pollen has yet to be determined. The goal of this research project was to implement and compare multiple …

Go to article

Gendering Labor: How Foreign Direct Investment Affects State Behavior Towards Female Labor In South And Southeast Asia, Ritu Dhungana Jan 2015

Gendering Labor: How Foreign Direct Investment Affects State Behavior Towards Female Labor In South And Southeast Asia, Ritu Dhungana

Graduate Theses, Dissertations, and Problem Reports (ETD)

This study examines the partnership between foreign capital (FDI) and state in manipulating women's labor. In this dissertation I have two research questions: My first research question is to determine whether the interaction between states and FDI renders workers vulnerable and unprotected. Other scholars have shown that states have been willing to relax labor laws (and offer non labor-related incentives) in order to attract FDI. My hypothesis is that cultural patriarchy intensifies this relationship between states and FDI, and further weakens the labor laws. My second research question is to identify the causal factors that bring about change in the …

Go to article

Role Of Mitochondria In Tnf-Alpha Neurotoxicity In Stroke, Danielle N. Doll Jan 2015

Role Of Mitochondria In Tnf-Alpha Neurotoxicity In Stroke, Danielle N. Doll

Graduate Theses, Dissertations, and Problem Reports (ETD)

TNF-alpha is known to exacerbate infarct volume in animal models and elevated levels of TNF-alpha are correlated with worse outcomes in stroke patients. However, the mechanism is not well understood. TNF-alpha has been shown to be neurotoxic at high doses and after long exposure times which is not clinically relevant. Thus, we show for the first time that TNF-alpha at clinically relevant concentrations seen in the serum of stroke patients rapidly and profoundly decreases mitochondrial function resulting in neuronal cell death through activation of caspase 8 and cytochrome c release. A slight decrease in mitochondrial function is detrimental to neurons …

Go to article

Fault Tolerance Analysis Of L1 Adaptive Control System For Unmanned Aerial Vehicles, Kiruthika Krishnamoorthy Jan 2015

Fault Tolerance Analysis Of L1 Adaptive Control System For Unmanned Aerial Vehicles, Kiruthika Krishnamoorthy

Graduate Theses, Dissertations, and Problem Reports (ETD)

Trajectory tracking is a critical element for the better functionality of autonomous vehicles. The main objective of this research study was to implement and analyze L1 adaptive control laws for autonomous flight under normal and upset flight conditions. The West Virginia University (WVU) Unmanned Aerial Vehicle flight simulation environment was used for this purpose. A comparison study between the L1 adaptive controller and a baseline conventional controller, which relies on position, proportional, and integral compensation, has been performed for a reduced size jet aircraft, the WVU YF-22. Special attention was given to the performance of the proposed control laws in …

Go to article

Biodiesel From Tall Oil Fatty Acids And Physico Thermal Properties Of Tropical Tree Fruit Oils As Thermal Energy Storage Systems, Gideon Sackey Lawer-Yolar Jan 2015

Biodiesel From Tall Oil Fatty Acids And Physico Thermal Properties Of Tropical Tree Fruit Oils As Thermal Energy Storage Systems, Gideon Sackey Lawer-Yolar

Graduate Theses, Dissertations, and Problem Reports (ETD)

Research into biodiesel as a substitute for petroleum diesel has been ongoing since the energy crisis of the 1970's. The concern for the effect on the use of edible vegetable oils as feedstock has increased. Tall oil fatty acids have been considered as a non-food substitute and various works have been done on it. In this study, sulfuric acid and Amberlyst BD 20 were used as homogeneous and heterogeneous catalysts respectively in the production of biodiesel from Tall oil fatty acids in a batch reactor. The treatment conditions for the homogeneous catalysis varied the factors of fatty acid to methanol …

Go to article

A Novel Microbial Source Tracking Dna Microarray Used For Pathogen Detection In Environmental Systems, Xiang Li Jan 2015

A Novel Microbial Source Tracking Dna Microarray Used For Pathogen Detection In Environmental Systems, Xiang Li

Graduate Theses, Dissertations, and Problem Reports (ETD)

Pathogen detection and the identification of fecal contamination sources can be challenging in environmental and engineered treatment systems. Factors including pathogen diversity and ubiquity of fecal indicator bacteria hamper risk assessment and remediation of contamination sources. Therefore, a quick method that can detect and identify waterborne pathogens in environmental systems is needed. In this work, a custom microarray targeting pathogens (viruses, bacteria, protozoa), microbial source tracking (MST) markers, mitochondria DNA (mtDNA) and antibiotic resistance genes was used to detect over 430 selected gene targets in whole genome amplification (WGA) DNA and complementary DNA (cDNA) isolated from sewage and animal (avian, …

Go to article

Discovery Of A Novel Oocyte-Specific Krab-Containing Zinc Finger Protein Required For Early Embryogenesis In Cattle, Jacqelyn M. Hand Jan 2015

Discovery Of A Novel Oocyte-Specific Krab-Containing Zinc Finger Protein Required For Early Embryogenesis In Cattle, Jacqelyn M. Hand

Graduate Theses, Dissertations, and Problem Reports (ETD)

Much of the loss of potential offspring in cattle is concentrated in the early embryonic period. Maternal mRNAs that accumulate in the oocyte during oogenesis have important functional roles during the initial stages of embryonic development, before embryonic genome activation. It is well regarded that the oocyte plays an active role in regulation of key aspects of the reproductive process required for fertility. What is more, oocyte-specific transcription factors seem to be the controlling feature influencing germ cell success throughout oogenesis, fertilization, and early embryonic development. Of the remarkably diverse array of transcription factors encoded by mammalian genomes, about two-thirds …

Go to article

A Feasibility Analysis For The Development Of A Facility Utilizing Olive Oil Mill Production Waste As A Carbon Substrate In Polyhydroxyalkanoate Production In Morocco, Catherine Hansen Jan 2015

A Feasibility Analysis For The Development Of A Facility Utilizing Olive Oil Mill Production Waste As A Carbon Substrate In Polyhydroxyalkanoate Production In Morocco, Catherine Hansen

Graduate Theses, Dissertations, and Problem Reports (ETD)

This thesis presents a market study and economic feasibility analysis on developing a facility utilizing olive oil production waste as a carbon substrate in polyhydroxyalkanoate production. Three underlying questions will be explored within this thesis: (1) Can olive oil mill effluents be utilized to produce an environmentally friendly polyhydroxyalkanoate bio-plastic?;, (2) Is there potential for the bio-plastic polyhydroxyalkanoate to enter Morocco's plastic market?;, (3) Is it likely that a bio-plastic facility utilizing olive oil mill production waste to create polyhydroxyalkanoate would have long term profitability? This research provides a pathway toward a new solution to a pervasive environmental concern facing …

Go to article

The Assessment Of Instruments For Detecting Surface Water Spills And A Three-Dimensional Model Of The Elk River Spill, Aubrey E. Harris Jan 2015

The Assessment Of Instruments For Detecting Surface Water Spills And A Three-Dimensional Model Of The Elk River Spill, Aubrey E. Harris

Graduate Theses, Dissertations, and Problem Reports (ETD)

Source water protection has been an increasing area of concern due to the risks associated with chemical storage and oil and gas operations. To better identify and mitigate risk, models and tools are needed to evaluate the dispersion of pollutants in possible spill scenarios. This information may be used to determine the placement of in-stream water quality monitoring instruments and to develop early-warning systems and emergency plans.;In this work, two approaches of applying chemical dispersion models are described: one to determine the necessary concentration to generate a signal from in-stream measurements; and second to demonstrate, in a numerical three-dimensional model, …

Go to article

3d Seismic Attribute-Assisted Analysis Of Microseismic Events In The Marcellus Shale, Ariel Kelton Hart Jan 2015

3d Seismic Attribute-Assisted Analysis Of Microseismic Events In The Marcellus Shale, Ariel Kelton Hart

Graduate Theses, Dissertations, and Problem Reports (ETD)

Microseismic monitoring is often used during the process of oil and gas exploitation to monitor seismicity that may be triggered by hydraulic fracturing, a common practice in the Appalachian Basin. Anthropogenically-induced minor upward fracture growth is not uncommon in the Marcellus shale; however, in the area of study, significant microseismic activity was registered above the target zone. In order to ascertain whether out-of-zone growth might have been predictable and identify which areas are more likely to experience brittle failure first, 3D seismic and microseismic data were analyzed with a focus on better understanding variations in the acoustic properties associated with …

Go to article

Middle And High School Science Teachers' Attitudes Toward Nanotechnology And Intention To Implement It In Science Classrooms, Nadira I. Ghattas Jan 2015

Middle And High School Science Teachers' Attitudes Toward Nanotechnology And Intention To Implement It In Science Classrooms, Nadira I. Ghattas

Graduate Theses, Dissertations, and Problem Reports (ETD)

This study was designed to determine the relationship between attitudes toward nanotechnology and the intention of implementing it in science classrooms; to detect the relationship between attitudes and other influential factors (knowledge and self-confidence, professional development, professional context, personal research experience, and personal practice of bringing nanotechnology in science classrooms); to highlight the salient attitudes of science teachers toward nanotechnology and implementing its related content, materials, and activities in science classrooms; and to identify the salient factors that would facilitate the process of integrating nanotechnology in science classrooms.;Science Teachers' Attitudes toward Nanotechnology (STAT-N) survey and semi-structured interview were both used …

Go to article

Family Distress, First-Generation College Status, And Financial Stress As Predictors Of Alcohol Use In College Students Seeking Mental Health Treatment, Narayan Jeremy Gold Jan 2015

Family Distress, First-Generation College Status, And Financial Stress As Predictors Of Alcohol Use In College Students Seeking Mental Health Treatment, Narayan Jeremy Gold

Graduate Theses, Dissertations, and Problem Reports (ETD)

Increasing numbers of students have been presenting for mental health treatment on college campuses to address their alcohol use (Gallagher, 2010). The goal of the current study was to examine the relationship between presenting alcohol use, family distress, college generational status (first-generation to college or non-first-generation to college), and financial distress. By examining the predictive nature of these variables screening could be improved to help identify and help students who are more at risk of experiencing the negative impact of alcohol use. It was hypothesized that higher levels of family distress, more financial stress, and being a first-generation college student …

Go to article

First Prev Next Last