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Graduate Theses, Dissertations, and Problem Reports (ETD)

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Identifying Potential Sources Of Variation In Residual Feed Intake In Beef Cattle, Kevin S. Shaffer May 2012

Identifying Potential Sources Of Variation In Residual Feed Intake In Beef Cattle, Kevin S. Shaffer

Graduate Theses, Dissertations, and Problem Reports (ETD)

Residual feed intake (RFI) class differences in gut function and grazing intake were evaluated using 14 crossbred steer progeny of first parity dams with known RFI phenotypes and a commercially available Angus sire. Steers were housed in a drylot facility and fed a forage based complete feed ad libitum, a forage diet at maintenance (1.5% BW as fed), and a concentrate diet at maintenance in Exp. 1, 4, and 5 respectively. Voluntary DMI and solid and liquid passage rate were evaluated while grazing (Exp. 2 and 3, respectively). Plasma concentrations of albumin (ALB), urea nitrogen (UN), cholesterol (CHOL), glucose (GLU), …

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A Context Centric Model For Building A Knowledge Advantage Machine Based On Personal Ontology Patterns, Luyi Wang May 2012

A Context Centric Model For Building A Knowledge Advantage Machine Based On Personal Ontology Patterns, Luyi Wang

Graduate Theses, Dissertations, and Problem Reports (ETD)

Throughout the industrial era societal advancement could be attributed in large part to introduction a plethora of electromechanical machines all of which exploited a key concept known as Mechanical Advantage. In the post-industrial era exploitation of knowledge is emerging as the key enabler for societal advancement. With the advent of the Internet and the Web, while there is no dearth of knowledge, what is lacking is an efficient and practical mechanism for organizing knowledge and presenting it in a comprehensible form appropriate for every context. This is the fundamental problem addressed by my dissertation.;We begin by proposing a novel architecture …

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Ecological Effects Of And Recovery Following Surface Mining And Pasture Reclamation, Michael Levy May 2012

Ecological Effects Of And Recovery Following Surface Mining And Pasture Reclamation, Michael Levy

Graduate Theses, Dissertations, and Problem Reports (ETD)

Surface mining with concurrent reclamation to pasture is a major driver of land use and cover change in Appalachia and constitutes a massive disturbance. Prior research suggests that some aspects of recovery are either slow or incomplete. We examined ecosystem structure---including soil physical and chemical properties, arbuscular mycorrhizal fungal (AMF) infectivity and community, and plant diversity and community composition---on a chronosequence of pasture-reclaimed surface mines and an unmined pasture in northern West Virginia. We also examined the effect of inoculating red clover, grown with high or low phosphorus, with AMF communities from old and young pasture-reclaimed surface mines and an …

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Effects Of Residual Moisture And Zero Conditioning Time On Maximum Theoretical Specific Gravity, John Elias Crane May 2012

Effects Of Residual Moisture And Zero Conditioning Time On Maximum Theoretical Specific Gravity, John Elias Crane

Graduate Theses, Dissertations, and Problem Reports (ETD)

A critical issue in determining theoretical maximum specific gravity (Gmm) for Hot Mix Asphalt (HMA) mixtures appears when the aggregates used have high absorption. This high absorption in aggregates, like air cooled iron blast furnace slag, can greatly affect the Gmm values of the sample, which in turn affects the contractor's ability to accurately evaluate the volumetric properties of the asphalt concrete. WV Paving, the largest asphalt paving contractor in West Virginia, uses slag aggregates in many of their mixes. There is concern that the dry-back procedure used to determine Gmm of these mixtures is not producing reliable results. Gmm …

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Efficacy Of Varying Rates Of Herbicide And Surfactant For The Control Of Understory Oriental Bittersweet (Celastrus Orbiculatus Thunb.) Plants In An Appalachian Hardwood Forest, Terry L. Burhans Jr. May 2012

Efficacy Of Varying Rates Of Herbicide And Surfactant For The Control Of Understory Oriental Bittersweet (Celastrus Orbiculatus Thunb.) Plants In An Appalachian Hardwood Forest, Terry L. Burhans Jr.

Graduate Theses, Dissertations, and Problem Reports (ETD)

Oriental bittersweet (Celastrus orbiculatus) is an invasive climbing, twining vine that can grow up into the forest canopy effectively inhibiting growth and light exposure on affected trees. A local landowner who had treated bittersweet with various rates of a glyphosate-based herbicide claimed that higher than recommended rates of herbicide were needed to effectively control the invasive plant. This study was established to assess the validity of this claim and to explore the interaction of glyphosate and surfactant effects on the efficacy of bittersweet control. The goal was to determine an ideal treatment of herbicide and surfactant rates for the effective …

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Manufacturing, Evaluation And Field Implementation Of Recycled Gfrp-Composite Railroad Ties, Venugopal R. Chada May 2012

Manufacturing, Evaluation And Field Implementation Of Recycled Gfrp-Composite Railroad Ties, Venugopal R. Chada

Graduate Theses, Dissertations, and Problem Reports (ETD)

Wood railroad crossties resistance to current higher axle loads, speeds and frequency, along with the durability under harsh environments has proven to be inadequate. Additionally, defects such as decay, holes, splits, checks etc may further impair the strength and durability characteristics of the wood crossties. In this project, recycled polymer and discarded wood were used to increase the performance characteristics of the RR tie including resistance to higher axle loads, minimization of defects, and better performance under harsh environmental conditions. The objective of this study is to enhance and assess the strength characteristics of the timber crossties by using the …

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Calculating The Surface Seismic Signal From A Trapped Miner, Adeniyi A. Adebisi May 2012

Calculating The Surface Seismic Signal From A Trapped Miner, Adeniyi A. Adebisi

Graduate Theses, Dissertations, and Problem Reports (ETD)

The recent Sago mine disaster has highlighted the need to fundamentally analyze the practical detection limitations of a mine rescue seismic system (Heasley, 2006). In various field tests, it was discovered that the surface peak particle velocity resulting from the trapped miner who pounds on the mine roof becomes undetectable past a certain distance from the surface geophones. In order to provide the mine rescuer the understanding of the exact extent of this distance; and the foreknowledge about the excepted magnitude of the surface peak particle movement in terms of: depth, geology and offset angle, this study was performed.;To achieve …

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Effect Of Sediment Composition On The Uniformity Of Experimentally-Formed Methane Hydrate, Terrence R. Ryan May 2012

Effect Of Sediment Composition On The Uniformity Of Experimentally-Formed Methane Hydrate, Terrence R. Ryan

Graduate Theses, Dissertations, and Problem Reports (ETD)

Experimentalists that try to duplicate the methane hydrate found in natural systems have regularly made non-uniform hydrate in packed sediments. Some element of the natural system is missing from the experimental procedure. The goal of this research was to discover what role sediment composition and grain size play in the uniformity of experimentally-formed methane hydrate. The discoveries were quite surprising.;The motivation for this research lies in the analysis of sediment samples and well-log data from the 2010 Mount Elbert, AK Stratigraphic Test Well. Sedimentological analysis of core samples from this well indicated that a thin section within the methane hydrate …

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Comprehensive And Integrated Model For Atmospheric Status In Sealed Underground Mine Areas, Jianwei Cheng May 2012

Comprehensive And Integrated Model For Atmospheric Status In Sealed Underground Mine Areas, Jianwei Cheng

Graduate Theses, Dissertations, and Problem Reports (ETD)

Mine gas explosion is one of the most feared hazards in the coal industry worldwide. More often one gas explosion related accident can cause the death of multiple coal miners. Since the beginning of coal mining, numerous mine workers have lost their lives as a result of gas explosions. Such occurrences have long been a major concern for mining engineers. Examination of two coal mine disasters (Sago mine and UBB mine) that have occurred in the U.S. in recent years reveals that all explosions originated from or around the sealed areas. Therefore, a good understanding of the atmospheric status in …

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Negative Reinforcement By Timeout From Avoidance: The Roles Of Discriminative Cues, Shock-Frequency Reduction, And Response-Effort Reduction, Anne M. Foreman May 2012

Negative Reinforcement By Timeout From Avoidance: The Roles Of Discriminative Cues, Shock-Frequency Reduction, And Response-Effort Reduction, Anne M. Foreman

Graduate Theses, Dissertations, and Problem Reports (ETD)

Timeout from avoidance is an effective reinforcer, but the reason is not firmly established. Rats responded on concurrent schedules of avoidance and timeout. Pressing the right lever postponed shocks according to a schedule with a response-shock interval of 30 s and a shock-shock interval of 5 s, and pressing the left lever produced 2-min timeouts according to a variable-interval 45-s schedule. To assess the roles of shock-frequency reduction, response-effort reduction, and signals in varying the reinforcing efficacy of timeout, three experiments were conducted. In Experiment 1, to assess the point at which the reinforcing efficacy of the timeouts would be …

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Pre And Post Blast Chemical Comparison Of The Intra- And Inter-Variability Of Metal Pipes Commonly Used In Pipe Bombs, Mandi Hellested May 2012

Pre And Post Blast Chemical Comparison Of The Intra- And Inter-Variability Of Metal Pipes Commonly Used In Pipe Bombs, Mandi Hellested

Graduate Theses, Dissertations, and Problem Reports (ETD)

Pipe bombs are a substantial problem around the world killing and injuring thousands each year. Traditionally explosive used, residues of explosives, and bomb components have been the main source of evidence in the investigation of a located or exploded pipe bomb. This research analyzed the trace elemental compositions of metal pipes to investigate if pipes can be compared. It was found that in a sample set of 37 pipes, of different brands and purchase locations, each pipe was homogenous at trace elemental concentrations. This homogeneity allowed for comparison between pipes. An x-ray tube, as an alternate excitation source, which had …

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Ap Relationship Of The Maxillary Central Incisors To The Forehead In Adult Korean Females, Jung Mee Kim May 2012

Ap Relationship Of The Maxillary Central Incisors To The Forehead In Adult Korean Females, Jung Mee Kim

Graduate Theses, Dissertations, and Problem Reports (ETD)

Objectives: To evaluate and compare the anteroposterior relationship of the maxillary central incisors to the forehead in adult Korean females with harmonious profiles and in adult Korean female orthodontic patients. Methods: Ninety five photographic images of adult Korean females with good facial harmony (control group) were compared with 95 photographs of adult Korean females seeking orthodontic treatment (study group). All images were of the face in profile with the maxillary central incisors and the forehead in full view. The images were imported into Adobe Photoshop(TM) and resized and rotated to the upright head position. Reference lines were constructed to assess …

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Uav Simulation Environment For Autonomous Flight Control Algorithms, Ondrej Karas May 2012

Uav Simulation Environment For Autonomous Flight Control Algorithms, Ondrej Karas

Graduate Theses, Dissertations, and Problem Reports (ETD)

This thesis presents the development of a UAV simulation environment for the design, analysis, and comparison of autonomous flight control laws. The simulation environment was developed in MATLAB/Simulink, with custom map generation software and FlightGear 3-D visualization. Graphical user interface of the simulation environment is user-friendly and all available options are discussed in detail. Aircraft dynamic models are presented, with emphasis on newly designed UAV models. Five different aircraft models are available, with several path planning and trajectory tracking algorithms implemented. Emphasis is given to simulation of failures and other abnormal conditions, so that appropriate tools for failure detection, evaluation, …

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Metonymic, Thomas Stollar May 2012

Metonymic, Thomas Stollar

Graduate Theses, Dissertations, and Problem Reports (ETD)

This thesis intends to support and describe Metonymic, a Masters of Fine Arts exhibition. The exhibition was the result of recorded introspection during the month of January 2012. Metonymic (Image 1)* aimed to highlight the importance of seemingly meaningless everyday occurrences, feelings, and emotions on the growth of one's personality. Ultimately the exhibition emphasizes the abstract nature of human personality, and its unimaginable complexities. *Please refer to dissertation for diagrams.

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Agenda Building In Health Communication: How The Cdc Is Using Traditional And Social Media Tactics In Public Relations, Kristen Wishon May 2012

Agenda Building In Health Communication: How The Cdc Is Using Traditional And Social Media Tactics In Public Relations, Kristen Wishon

Graduate Theses, Dissertations, and Problem Reports (ETD)

Emerging Internet technologies, such as social networking websites and blogs, are influencing how public relations practitioners choose to disseminate health content to their constituents. Using the agenda-building theory as a guide, this exploratory study used both qualitative and quantitative methods to examine the Centers for Disease Control and Prevention's (CDC) social media and traditional media health messages, as well as to explore if these messages had any agenda-building effect on mainstream media placement (i.e., the Associated Press).;Personal interviews with CDC health communication specialists and three content analyses were conducted. Two significant correlations were found between the health topics in the …

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A Theoretical Relationship Between Guardianship And Techniques Of Neutralization: A Qualitative Analysis Of Digital Piracy, Christopher D. Davies May 2012

A Theoretical Relationship Between Guardianship And Techniques Of Neutralization: A Qualitative Analysis Of Digital Piracy, Christopher D. Davies

Graduate Theses, Dissertations, and Problem Reports (ETD)

This research is a qualitative analysis of digital piracy at the height of Napster in 1999. The findings support the notion that technology has given rise to several new techniques of neutralization. In some cases these techniques are completely new and in others they are 21st century updates to traditional techniques. Furthermore, this research uses forum posts from USENET to determine that guardianship as created by Cohen and Felson's Routine Activities Theory is uniquely connected to neutralization based on two unique guardianship qualities, authority and capacity.

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Guns And Shikaris: The Rise Of The Sahib's Hunting Ethos And The Fall Of The Subaltern Poacher In British India, 1750-1947, Fiona Mani May 2012

Guns And Shikaris: The Rise Of The Sahib's Hunting Ethos And The Fall Of The Subaltern Poacher In British India, 1750-1947, Fiona Mani

Graduate Theses, Dissertations, and Problem Reports (ETD)

This dissertation examines the history of hunting in India under British colonialism, but with some background on earlier periods and a brief discussion on Nepal and successor states of India, Pakistan, Bangladesh. The study relies on Indian and British sources including private papers, memoirs, books, and official records. It examines hunting by different native groups in India, British men and women, and considers the relationship of hunting to political authority, gender identity, and conservation and the environment.;Before the British takeover of India, the country had a hunting tradition that included royal hunting and tribal hunting. The British also had a …

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Forest Fragmentation Mapping, Change Detection, And Gas Well Site Identification In Remotely Sensed Imagery: The Role Of Spatial Resolution, Benjamin A. Baker May 2012

Forest Fragmentation Mapping, Change Detection, And Gas Well Site Identification In Remotely Sensed Imagery: The Role Of Spatial Resolution, Benjamin A. Baker

Graduate Theses, Dissertations, and Problem Reports (ETD)

This research focuses on identifying optimal data and methods for detecting and quantifying land cover/land use change associated with natural gas drilling in Appalachia. Airborne and satellite remote sensing provides a tool for examining land cover changes. Although change detection has been used in many applications related to natural and anthropogenic land cover change, little research has investigated the spatial pattern of land cover change associated with the ongoing expansion of natural gas drilling, particularly within the Marcellus Shale formation found across much of the northern Appalachian Region. Mapping land cover/land use change facilitates research of other relevant topics that …

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Eastern Promises: Poland's Role As A Regional Actor In The European Union's Eastern Policy-- The Example Of Belarus, Max David Reinke May 2012

Eastern Promises: Poland's Role As A Regional Actor In The European Union's Eastern Policy-- The Example Of Belarus, Max David Reinke

Graduate Theses, Dissertations, and Problem Reports (ETD)

The present thesis will analyze Poland's current and potential role as an effective regional actor in mediating the European Union's (EU) relations with its easternmost neighbors. In order to most accurately assess this, this thesis will examine Poland's relationship with Belarus, specifically democratization efforts and forging a strong, resolute association with the European Union. Being a successful post-communist transition state and recent EU Member State, Poland has for some time seen itself to be the most-qualified country to bridge Eastern and Western Europe. Belarus in particular is a country of concern for the Polish government because it is a bordering …

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Aspects Of Form, Tonality, And Texture In The ''Farewell'' Piano Sonatas Of Beethoven And Dussek, Kyoung Cha May 2012

Aspects Of Form, Tonality, And Texture In The ''Farewell'' Piano Sonatas Of Beethoven And Dussek, Kyoung Cha

Graduate Theses, Dissertations, and Problem Reports (ETD)

In the early 19th century, two composers, Jan Ladislav Dussek (1760-1812) and Ludwig van Beethoven (1770-1827), each wrote one piano sonata with a "Farewell" title. The Bohemian musician Dussek was one of the renowned composers of his era. He was also famous as a pianist, with a brilliant and virtuosic style of playing. Beethoven was a German composer who has become enshrined as one of the major representatives of the Classical period, as well as of classical music in general. He wrote numerous masterpieces covering almost every known genre of his time, including symphony, chamber music, concerto, sonata, mass, and …

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Assessing The Thermal Tolerance And Growth Potential At Elevated Temperatures Of Three Different Strains Of Rainbow Trout (Oncorhynchus Mykiss), Michael A. Porto May 2012

Assessing The Thermal Tolerance And Growth Potential At Elevated Temperatures Of Three Different Strains Of Rainbow Trout (Oncorhynchus Mykiss), Michael A. Porto

Graduate Theses, Dissertations, and Problem Reports (ETD)

This thesis examines how critical thermal maxima (CTM) differs between different strains of rainbow trout (Oncorhynchus mykiss) and explores the relationship between thermal tolerance and consumption, conversion efficiency, and growth rates at elevated temperatures. This thesis is comprised of three chapters; (1) an introduction and literature review on studies of temperature tolerance and growth in salmonids, (2) an experimental study investigating the CTM of three different strains of rainbow trout, and (3) an experimental study investigating the correlation between thermal tolerance and consumption, food conversion efficiency (FCE) and growth at elevated temperatures. For the first experimental study, we quantified the …

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A Simplified Icing Model For Simulation And Analysis Of Dynamic Effects, Matthew A. Cunningham May 2012

A Simplified Icing Model For Simulation And Analysis Of Dynamic Effects, Matthew A. Cunningham

Graduate Theses, Dissertations, and Problem Reports (ETD)

Ice accretions on aerodynamic surfaces are a major concern during flight. In this research effort, glaze ice is being modeled and its effects on aircraft dynamics analyzed. This type of ice builds up as a clear layer on aerodynamic surfaces and other components such as antennas and intakes. Glaze icing is dangerous because as the amount of ice increases, it alters the shape and properties of the aerodynamic surface. Wind tunnel tests of this type of icing and data analysis have shown that the main effects of icing consist of decrease of lift coefficient, reduction of stall angle of attack, …

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The Occlusal Plane Inclination Relative To Craniofacial Form: A Cephalometric Investigation, Holly Eppard May 2012

The Occlusal Plane Inclination Relative To Craniofacial Form: A Cephalometric Investigation, Holly Eppard

Graduate Theses, Dissertations, and Problem Reports (ETD)

Background Objectives: The occlusal plane has been given much attention throughout the orthodontic literature. Studies have shown that the occlusal plane inclination varies relative to vertical and sagittal skeletal discrepencies. The Six Elements of Orofacial Harmony does not address the occlusal plane inclination as a parameter in diagnosis and treatment planning despite its spatial influence on the position of the chin. The occlusal plane inclination is considered a critical factor in treatment planning for orthognathic surgery. The objective of this study was to systematically evaluate the inclination of the occlusal plane (Op°) relative to various skeletal and dental cephalometric parameters. …

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Hydrogen Absorption In Palladium-Based Nanostructures., Kineshma Munbodh Jan 2012

Hydrogen Absorption In Palladium-Based Nanostructures., Kineshma Munbodh

Graduate Theses, Dissertations, and Problem Reports (ETD)

In this work, the effects of hydrogen (H2) absorption on the magnetic properties of Co/Pd multilayers are investigated. The saturation magnetization (Ms) and perpendicular anisotropy energy density (Kp) of Co/Pd multilayers were studied when the samples were exposed to one atmosphere of hydrogen (H2) and helium (He) at room temperature. Two series of (Co tCo/Pd tPd) were grown with the Co nominal thickness, tCo fixed at 2.5 A and 4.5 A and the tPd thickness, tPd varying from 0 to 25 A. When the Pd thickness was less than 10 A, there was no change in Ms and Kp. As …

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Sports-Related Traumatic Brain Injury: An Investigation Of College Student-Athletes' Perceptions Of Communicative Facework And Communicative Strategies For Managing Uncertainty., Sydney M. Staggers Jan 2012

Sports-Related Traumatic Brain Injury: An Investigation Of College Student-Athletes' Perceptions Of Communicative Facework And Communicative Strategies For Managing Uncertainty., Sydney M. Staggers

Graduate Theses, Dissertations, and Problem Reports (ETD)

Traumatic brain injury (TBI; also referenced as “concussion”) is recognized as a major public health issue in the United States with approximately 1.7 million individuals sustaining a TBI annually (Centers for Disease Control and Prevention [CDC], 2012c). There is a greater propensity for concussions in athletic environments (Powell, 2001). Based on both reported and non-reported accounts, it is estimated that anywhere from 1.6 to 3.8 million sports-related (across all sports and recreational activities) concussions occur each year in the United States (Hayes, 2007). As a result, this dissertation, which entailed two studies, examined college student-athletes’ perceptions of others’ (i.e., coach, …

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Physicians' Perceptions Of West Virginia's Kids First Healthcheck System., Alexandria Kappel Jan 2012

Physicians' Perceptions Of West Virginia's Kids First Healthcheck System., Alexandria Kappel

Graduate Theses, Dissertations, and Problem Reports (ETD)

Universal Pre-K programs provide free, easily accessible education programs in West Virginia for 4-year-olds and 3-year-olds with Individualized Education Programs (Barnett et al., 2010). West Virginia Policy 2525 provides regulations guiding the implementation of the Universal Pre-K programs. Included in the policy are guidelines for areas such as recruitment, enrollment, and instruction. Section 126-26-8.7 of the policy outlines the state’s plan for the target area of developmental screening for the children in its Universal Pre-K classrooms. The plan outlines the use of the West Virginia Kid’s First HealthCheck System. The goal of the study was to study the implementation of …

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Exposure To Perfluoroalkyl Chemicals And Its Relation To Serum Lipids, Serum Uric Acid, And Blood Pressure Levels In Children., Sarah Dee Geiger Jan 2012

Exposure To Perfluoroalkyl Chemicals And Its Relation To Serum Lipids, Serum Uric Acid, And Blood Pressure Levels In Children., Sarah Dee Geiger

Graduate Theses, Dissertations, and Problem Reports (ETD)

Introduction: PFCs are manmade chemicals that are very pervasive in the US. They have been found to be present in the blood of more than 98% of Americans and have a long half-life. Studies have shown that perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) have endocrine-disrupting properties and exposure is positively associated with serum lipids, serum uric acid, reproductive effects, low birth weight and cancers, among other negative health effects. Cardiovascular disease is a leading cause of death worldwide and risk factors include dyslipidemia, hyperuricemia, and hypertension. In this context, we examined the association between PFOA and PFOS and serum …

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An Experimental Investigation Of Swelling And Elastic Property Changes Resulting From Carbon Dioxide Injection Into Prismatic Coal Specimens., Bongani Dlamini Jan 2012

An Experimental Investigation Of Swelling And Elastic Property Changes Resulting From Carbon Dioxide Injection Into Prismatic Coal Specimens., Bongani Dlamini

Graduate Theses, Dissertations, and Problem Reports (ETD)

The world currently relies heavily on fossil fuels to meet its energy needs. The demand from a growing population for energy continues to increase and cannot be met solely by renewable sources of energy. As a result of this high dependence on fossil fuels, various methods of reducing emissions are under investigation. Carbon dioxide Capture and Storage (CCS) has been identified as a potential technique that can be employed to reduce emissions. Unmineable coal seams have been identified as a possible carbon dioxide geologic storage formation. The behavior of coal in response to CO2 injection is not yet fully understood …

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Ptsd And Its Relation To Trauma And Offending In Incarcerated Juveniles., Elizabeth E. Stacom Jan 2012

Ptsd And Its Relation To Trauma And Offending In Incarcerated Juveniles., Elizabeth E. Stacom

Graduate Theses, Dissertations, and Problem Reports (ETD)

Research indicates that individuals who perpetuate abuse may also have a history of experiencing abuse (Ford & Linney, 1995; Worling, 1995). Yet, not all abused children will engage in offending behavior (Becker & Hunter, 1997). This study investigated posttraumatic stress disorder (PTSD), caregiver instability, and low social support, and how these factors relate to offending behavior. Participants were 32 juveniles with sexual offenses (SO), 40 juveniles with violent nonsexual offenses (VO), and 18 juveniles with nonsexual nonviolent offenses (NSVO) detained at the West Virginia Home for Youth in Salem, WV. The participants reported directly experiencing and witnessing a mean of …

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Implementation Of Wet Scrubbing Technologies To Marine Diesel Engines For The Reduction Of Nitrigen Oxide Emissions., Derek R. Johnson Jan 2012

Implementation Of Wet Scrubbing Technologies To Marine Diesel Engines For The Reduction Of Nitrigen Oxide Emissions., Derek R. Johnson

Graduate Theses, Dissertations, and Problem Reports (ETD)

Diesel engines are known for their reliability and fuel economy when compared to their gasoline counterparts. They are the engine of choice for application in marine vessels but are also known contributors of regulated emissions, especially oxides of nitrogen (NOx). NOx emissions have both negative health and environmental effects, which are exacerbated in port regions where marine activity is high. Recent emissions regulations have dramatically reduced engine out emissions for on-road and off-road engines by requiring new technologies but mainly apply to those newly produced. Marine diesel engines have useful lives of over 20 years. The focus of this research …

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