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Holocene Paleoenvironmental Reconstruction From Mexico's Pacific Coast-A Paleotempestological Investigation, Thomas Bianchette
Holocene Paleoenvironmental Reconstruction From Mexico's Pacific Coast-A Paleotempestological Investigation, Thomas Bianchette
LSU Doctoral Dissertations
This dissertation examines the paleoenvironments of four lagoons from Mexico’s Pacific coast, with the aim of retrieving sediment deposition from storm surge events to determine long-term tropical cyclone (TC) records. Lagoons Agua Dulce, Boquita, Mitla, and Nuxco are located along a 700 km stretch in states Jalisco and Guerrero. Roughly 70 meters of sediment were collected and subjected to multiple proxies, including loss-on ignition, a microfossil survey, and geochemical analysis. Nuxco’s dynamism is caused by intense and prolonged rainfall (largely from TCs), responsible for increasing water level, opening the tidal inlet, and draining the site (termed “blowouts”). High amounts of …
Addressing The Land Loss-Fish Production Paradox, Kristy A. Lewis
Addressing The Land Loss-Fish Production Paradox, Kristy A. Lewis
LSU Doctoral Dissertations
Saltmarsh loss is occurring at high rates in Louisiana (LA), but understanding the impacts that marsh degradation has had on historical abundance of estuarine nekton in Barataria Bay, LA is lacking. I first examined the differences between fishery independent and fishery dependent data as indices of relative abundance. Previous studies used landings data to evaluate the importance of marsh habitat (e.g. distance of marsh edge and area of intertidal marsh) to fisheries production, but for most species, landings and survey data showed differing patterns of abundance through time. These findings emphasize the importance of using survey data (not landings data) …
Pragmatics, Prosody, And Social Skills Of School-Age Children With Language-Learning Differences, Janet Lynn Bradshaw
Pragmatics, Prosody, And Social Skills Of School-Age Children With Language-Learning Differences, Janet Lynn Bradshaw
LSU Doctoral Dissertations
Social skills are an important aspect of child development that continues to have influences in adolescence and adulthood (Hart, Olsen, Robinson, & Mandleco, 1997). Interacting in a social world requires an integration of many abilities that include social skills and emotional understanding of oneself and other persons. Children who have difficulties with interpreting social cues (e.g., identifying basic emotions and responding to cues in speech) have immediate and progressive consequences in both academics and social living. Children with typical language skills are successfully interacting with peers and acknowledging social rules for different environments (e.g., playing at school vs. playing at …
The Influence Of Personal And Educational Demographic Factors On The Productivity Of Farmers In Selected Geographic Regions Of The Ukraine, Viacheslav L. Sereda
The Influence Of Personal And Educational Demographic Factors On The Productivity Of Farmers In Selected Geographic Regions Of The Ukraine, Viacheslav L. Sereda
LSU Doctoral Dissertations
The primary purpose of this study was to determine Ukrainian farmers characteristics based on demographic information, describe their agricultural production, land ownership, best farming practices and determine factors that could influence farmers’ gross income. Of the tree Oblasts selected, a total of 250 farmers were randomly selected in two of the oblasts and 150 in the other (due to the size of the population in the smaller sample) for personal interviews by the raion specialists. Random samples were drawn from these lists using a computerized random numbers table. Survey was designed to collect necessary information. Raion specialists received one-day training …
Predictors Of National Broadcast And Cable Television News Coverage Of The Members Of The U.S. House Of Representatives, Jeremy Padgett
Predictors Of National Broadcast And Cable Television News Coverage Of The Members Of The U.S. House Of Representatives, Jeremy Padgett
LSU Doctoral Dissertations
This dissertation examines how institutional, individual, and situational variables work to influence the volume of national broadcast and cable television news coverage members of the 109th, 110th, 111th, and 112th U.S. Houses of Representatives received. Analysis combines public data on House structure, member characteristics, member effort, and member circumstances with original computer-aided content analysis of the 38,430 transcripts in which members spoke and the 243,205 statements members made on ABC, CBS, NBC, CNN, Fox News, and MSNBC between January 3, 2005 and January 3, 2013, the full terms of these four congresses. The results presented in this dissertation yield important …
Contractional Tectonics: Investigations Of Ongoing Construction Of The Himalaya Fold-Thrust Belt And The Trishear Model Of Fault-Propagation Folding, Hongjiao Yu
LSU Doctoral Dissertations
This dissertation focuses on the kinematic evolution of contractional tectonics: the Himalayan fold-thrust belt along the collisional orogenic belts, and growth of the basement-cored monoclines in Colorado Plateau. Ongoing Himalayan growth is generally thought to be dominated by duplexing and/or extrusion processes. Duplexing models highlight accretion of material from the subducting plate to the over-riding orogenic wedge, whereas extrusion models focus on up-dip translation of a block bounded by out-of-sequence faults. Here, a primary outstanding question involves the uncertain relationship of the Berinag thrust and the Tons thrust, structures with displacements of >80 km and >40 km, respectively. The uncertainty …
Characterization Of A Novel Negative Regulator Of Toxoflavin Production, Ntpr, In The Plant Pathogen Burkholderia Glumae That Causes Bacterial Panicle Blight Of Rice, Rebecca Ann Melanson
Characterization Of A Novel Negative Regulator Of Toxoflavin Production, Ntpr, In The Plant Pathogen Burkholderia Glumae That Causes Bacterial Panicle Blight Of Rice, Rebecca Ann Melanson
LSU Doctoral Dissertations
Burkholderia glumae is the major causal agent of bacterial panicle blight of rice, a disease that can cause significant yield losses. This bacterial pathogen produces a number of virulence factors that contribute to disease development. The phytotoxin, toxoflavin is required for full virulence and is the most important virulence factor in B. glumae. The known regulatory cascade of toxoflavin production involves the TofI-TofR quorum-sensing system, the transcriptional activators ToxJ and ToxR, and the toxoflavin biosynthesis and transport genes. Transposon mutagenesis of toxoflavin-producing B. glumae strains generated a number of mutants with increased toxoflavin production. Several of these mutants contained …
Understanding The Impact Of Motivation On The Effectiveness Of Various Content Delivery Methods In Training Program Development: A Mixed-Methods Evaluation, Serena Lynn Fisher
Understanding The Impact Of Motivation On The Effectiveness Of Various Content Delivery Methods In Training Program Development: A Mixed-Methods Evaluation, Serena Lynn Fisher
LSU Doctoral Dissertations
The purpose of this study was to evaluate an online training program designed for part-time undergraduate Desk Assistants (DAs) employed by Louisiana State University’s (LSU) department of Residence Education. The evaluation of the training program included a comparison of video and lecture versions of a training program with comparable content to determine the effectiveness across a set of four outcomes: motivation during training, motivation after training, satisfaction, and learning. Additionally, this research contributed to the understanding of the impact of technology-mediated learning in training by examining factors that may differentially benefit or challenge the effectiveness of the training delivery method. …
Screening Ted: A Rhetorical Analysis Of The Intersections Of Rhetoric, Digital Media, And Pedagogy, Joseph Alan Watson
Screening Ted: A Rhetorical Analysis Of The Intersections Of Rhetoric, Digital Media, And Pedagogy, Joseph Alan Watson
LSU Doctoral Dissertations
The presence of expertise resonates across our daily lives. Experts are called upon to consult us about which candidate is ideal for office, which type of wood is the best choice for a carpentry project, which scientist has optimal data on the effects of air pollution, which speech teacher is the best one to take for proper credit hours, and more. An expert is typically conceived as an individual who knows more about a given topic and can create stronger identification than an average person. The struggle to achieve expert status is one that is fundamentally tied to power and …
The Ebony Seven: A Presidential Blueprint For Private Black College Achievement Of Global Competitiveness, Walter T. Tillman Jr.
The Ebony Seven: A Presidential Blueprint For Private Black College Achievement Of Global Competitiveness, Walter T. Tillman Jr.
LSU Doctoral Dissertations
ABSTRACT This qualitative study was born out of the researcher’s interest in better understanding the leadership of private Black colleges and strong desire to identify culturally relevant strategies for reimagining the utility and viability of this cohort of specialized universities. While the literature revealed an exploration of the history, mission and students of HBCUs, there was a dearth of scholarship on the presidents of these institutions. Additionally, the extant literature about HBCUs - treated the public and private HBCUs the same, failing to sufficiently address the uniqueness of both. Finally, the contemporary literature near unanimously suggested that HBCUs must identify …
Localization And Security Algorithms For Wireless Sensor Networks And The Usage Of Signals Of Opportunity, Gustavo Andres Chacon Rojas
Localization And Security Algorithms For Wireless Sensor Networks And The Usage Of Signals Of Opportunity, Gustavo Andres Chacon Rojas
LSU Doctoral Dissertations
In this dissertation we consider the problem of localization of wireless devices in environments and applications where GPS (Global Positioning System) is not a viable option. The _x000C_rst part of the dissertation studies a novel positioning system based on narrowband radio frequency (RF) signals of opportunity, and develops near optimum estimation algorithms for localization of a mobile receiver. It is assumed that a reference receiver (RR) with known position is available to aid with the positioning of the mobile receiver (MR). The new positioning system is reminiscent of GPS and involves two similar estimation problems. The _x000C_rst is localization using …
Genetics And Functions Of Herpes Simplex Virus Type-1 Membrane Proteins Ul20/Gk In Virion Envelopment And Entry, Anu Susan Charles
Genetics And Functions Of Herpes Simplex Virus Type-1 Membrane Proteins Ul20/Gk In Virion Envelopment And Entry, Anu Susan Charles
LSU Doctoral Dissertations
The envelopment and egress of the Herpes Simplex Virus is an important event in the life cycle of the virus. The important membrane proteins required for the envelopment and egress of the virus are glycoproteins gM, gK, gE and non-glycosylated membrane proteins UL20p and UL11. Among them one of the most critical protein is the UL20 protein which has four transmembrane domains with amino and carboxyl termini are predicted to lie within the cytoplasmic side of cellular membranes. Studies done in our laboratory have shown that deletion of UL20 or other lethal mutations have an adverse effect on envelopment and …
Untangling Earth System Responses Recorded In Sulfate's Sulfur And Oxygen Isotopes At The Dawn Of Multicellular Life And Today, Bryan Alan Killingsworth
Untangling Earth System Responses Recorded In Sulfate's Sulfur And Oxygen Isotopes At The Dawn Of Multicellular Life And Today, Bryan Alan Killingsworth
LSU Doctoral Dissertations
Major Earth system perturbations in the deep past and today are recorded in sulfate sulfur and oxygen isotopes, as examined here in three cases. (1) Sedimentary sulfate record of the “Marinoan Oxygen-17 Depletion” (MOSD) event, implies ultra-high CO2 atmosphere at ~635 Ma after global glaciation. MOSD duration is constrained by correlating its most complete record to radiometric dates. Barium sulfate layers in South China sediments show the MOSD in lower layers but persistently absent up section. Carbon-13 correlation locates the MOSD within dated intervals from other sites, yielding a 0 - 0.99 Myr duration. Thus, sedimentary constraint on this non-steady-state …
Enhancement Of Gulf Killifish, Fundulus Grandis, Fitness And Reproduction, Joshua Thomas Patterson
Enhancement Of Gulf Killifish, Fundulus Grandis, Fitness And Reproduction, Joshua Thomas Patterson
LSU Doctoral Dissertations
Gulf killifish, Fundulus grandis, shows promise for commercial development as a marine baitfish species. Significant markets for F. grandis already exist throughout the Gulf Coast, with the vast majority of supply coming from wild-harvests, which can be hampered by seasonal availability and inconsistent fish health and size. The genus Fundulus also represents an important group of model vertebrates for biological study. A recent review paper described this genus as the premier teleost model for environmental biology. New information generated as a result of the work contained in this dissertation may be more broadly applicable to sister species of F. grandis, …
Synthesis, Characterization, And Investigation Of The Catalytic Activity Of Nio, Cuo, And Nio-Cuo Nanoparticles On Silica As Surrogates Of Combustion-Generated Nanoparticles, Nuwan Nilanka Balapitiya Liyanage
Synthesis, Characterization, And Investigation Of The Catalytic Activity Of Nio, Cuo, And Nio-Cuo Nanoparticles On Silica As Surrogates Of Combustion-Generated Nanoparticles, Nuwan Nilanka Balapitiya Liyanage
LSU Doctoral Dissertations
Transition metal oxide nanoparticles contained in fly ash are known to catalyze the formation of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) during the waste incineration process. The potential catalytic activity of silica-supported NiO, CuO, and NiO-CuO nanoparticles for the formation of PCDD/Fs will be discussed in this dissertation. The successful synthesis of silica-supported NiO, CuO, and NiO-CuO nanoparticles as surrogates of combustion-generated nanoparticles was important to this study. The synthesis was followed by the characterization of the nanoparticle surrogates by X-ray photoelectron spectroscopy (XPS), X-ray absorption spectroscopy (XAS), transmission electron microscopy (TEM), and energy-dispersive X-ray spectroscopy (EDS). Finally, the catalytic …
A Performance Guide To Jake Heggie's From 'The Book Of Nightmares', Kristen Bauer Marchiafava
A Performance Guide To Jake Heggie's From 'The Book Of Nightmares', Kristen Bauer Marchiafava
LSU Doctoral Dissertations
The document will examine the four songs of the cycle, From ‘The Book of Nightmares,’ in detail and give suggestions for stylistic interpretation and performance. The written document contains four chapters: Chapter One provides biographical information and a stylistic overview of the composer Jake Heggie. Chapter Two contains biographical information and a stylistic overview for the poet Galway Kinnell. Chapter Three will provide information about the premiere and recording of From ‘The Book of Nightmares,’ as well as biographical information about soprano Lisa Delan, for whom the song cycle was written, and reviews of her recording “The Hours Begin to …
The Effects Of Concurrent Driving And In-Vehicle Tasks: A Multivariate Statistical Analysis Of Driver Distraction In A High-Fidelity Driving Simulator, Julius A. Codjoe
The Effects Of Concurrent Driving And In-Vehicle Tasks: A Multivariate Statistical Analysis Of Driver Distraction In A High-Fidelity Driving Simulator, Julius A. Codjoe
LSU Doctoral Dissertations
Distracted driving continues to remain a cause of concern for a number of bodies, including government agencies, traffic safety advocacy groups and law enforcement agencies, because of its traffic safety risks. The driving simulator continues to be popular with researchers in collecting data on performance variables that provide scientific knowledge of the effects of distracted driving. Several of these performance variables can be used to quantify a single distracting effect, resulting in a multivariate dataset. A literature review of related studies revealed that researchers overwhelmingly use univariate (single and multiple) tests to analyze the resulting dataset. Performing multiple univariate tests …
Supporting Your Instrument In A Body-Friendly Manner : A Comparative Approach, Emanuela Maria Lacraru
Supporting Your Instrument In A Body-Friendly Manner : A Comparative Approach, Emanuela Maria Lacraru
LSU Doctoral Dissertations
ABSTRACT The purpose of this monograph was two-fold: (1) to bring together a scattered array of literature about performance injury prevention (related to violin/viola support) into one source, organize and synthesize this literature with the intention of identifying principal issues, compare coverage and recommendations, and identify consistencies and inconsistencies; and (2) to assess the perceptions of upper string musicians and teachers about injury prevention in the context of the literature. For the first purpose, a comprehensive bibliography of relevant literature was developed. For the second purpose, a survey based on information revealed through the literature was developed and distributed. Total …
Liberalism And Globalization: An Essay On Montesquieu, Tocqueville, And Manent, Trevor Shelley
Liberalism And Globalization: An Essay On Montesquieu, Tocqueville, And Manent, Trevor Shelley
LSU Doctoral Dissertations
Many in the West today talk about the emergent unity of humanity, as social scientists examine the world through “global values,” assessing “global opinion”; economists study the “global economy” and “global finance”; historians write of “universal history;” legal scholars speak of “global domestic politics” and “world society,” while advocating “transnational justice”; political pundits announce the death of the nation-state. One could list additional examples illustrating the same apparent fact: a growing sense of global unity, and a universalist perspective on things social, economic, legal, historical, and political. To what extent, however, is this phenomenon—often referred to as “globalization”—an extension of …
Space-Efficient Data Structures For String Searching And Retrieval, Sharma Valliyil Thankachan
Space-Efficient Data Structures For String Searching And Retrieval, Sharma Valliyil Thankachan
LSU Doctoral Dissertations
Let D = {d_1, d_2, ...} be a collection of string documents of n characters in total, which are drawn from an alphabet set Sigma =[sigma] ={1,2,3,...sigma}. The top-k document retrieval problem is to maintain D as a data structure, such that when ever a query Q=(P, k) comes, we can report (the identifiers of) those k documents that are most relevant to the pattern P (of p characters). The relevance of a document d_r with respect to a pattern P is captured by score(P, d_r), which can be any function of the set of locations where P occurs in …
Multivariate Generalizability Of Writing Curriculum-Based Measurement (Cbm): An Examination Of Form, Occasion, And Scoring Method, Katherine Hunter Chenier
Multivariate Generalizability Of Writing Curriculum-Based Measurement (Cbm): An Examination Of Form, Occasion, And Scoring Method, Katherine Hunter Chenier
LSU Doctoral Dissertations
Curriculum-based measurement (CBM) is an assessment technique that has become increasingly popular in schools, gaining importance with the recent national emphasis on school and teacher accountability for student achievement. CBM is used to monitor student performance to provide an indicator of which students are at-risk of not achieving grade level standards and thus are in need of intervention. CBM is easy to administer, utilizes standard procedures, and provides measures indicative of general achievement in various domains. The utility of CBM to measure student ability in writing has been well-established. However, there is a paucity of technical adequacy research for writing …
Electrochemical Reduction Of Co2 On Supported Cu2o Catalysts, Joel Niño Galvez Bugayong
Electrochemical Reduction Of Co2 On Supported Cu2o Catalysts, Joel Niño Galvez Bugayong
LSU Doctoral Dissertations
We have examined Cu-based catalyst materials that enable the conversion of CO2 to useful products such as fuels and chemical feedstocks by electrochemical reduction. In particular, we compared the electrocatalytic activity of supported Cu2O particles prepared using electrodeposition and wet chemical methods. The particles had cubic structure, ranging in size from 40 nm to 900 nm and consisting of low index planes. We observed significantly different product distribution on these catalysts compared to polycrystalline Cu, specifically for methane and ethylene formation. While Cu particles showed higher faradaic efficiency for methane formation compared to ethylene formation, we observed that Cu2O particles …
Rare Earth/Transition Metal Oxides For Syngas Cleanup, Rui Li
Rare Earth/Transition Metal Oxides For Syngas Cleanup, Rui Li
LSU Doctoral Dissertations
Syngas from gasification of biomass or biomass and coal is a potential source of renewable energy. However, byproducts such as H2S and tars must be removed before further utilization or processing of syngas. Rare earth oxides (REOs, e.g., Ce/LaOx (1.7< x <2)) mixed with transition metals (e.g., Mn, Fe) were synthesized by various methods, and in some cases supported on a thermally stable alumina. Both desulfurization and tar reforming experiments were conducted at high temperatures under similar conditions with synthetic effluents in order to achieve better heat integration and higher yield to desired products CO and H2. The sulfur capacities at temperatures from 900-1025 K with air regeneration were measured for repeat cycles until a stable, reversible capacity was obtained. The oxidized and sulfided (reduced) sorbents were characterized by XRD, XANES, XAFS, TPR and BET. Density functional theory calculations were used to aid in interpreting characterization data and in explaining the enhanced S adsorption capacities. The results showed that mixed REOs, such as Ce/Tb, and Ce/La synthesized by a templated sol-gel approach do not have high sulfur capacities. The presence of either CO2 or H2O inhibits the adsorption of H2S. However, addition of Mn to REOs effectively increased the sulfur capacity, and Mn-REO sorbents are regenerable even in the presence of air, although there is some sulfate formation. The formation of elemental sulfur during regeneration could be related to the oxygen vacancies promoted by doping Mn into the ceria lattice. DFT calculations suggested doping Mn into CeO2 decreased the vacancy formation energies and lowered the H2S adsorption energy. In contrast, for MnO-doped REOs supported on ã-Al2O3, although their surface areas remained high after multi-cycle usage, the probable formation of MnAl2O4 as observed by XANES reduces the sulfur capacities. Reforming experiments were carried out using synthetic syngas mixtures with C10H8 as a tar model compound, both with and without H2S. The results showed that CO2 and H2O inhibit the reforming activities to some extent. Fe- or Mn-doped supported REOs are promising tar cleanup catalysts. They exhibited higher sulfur tolerance, less coking, and less methanation than typical Ni-based high temperature reforming catalysts. This behavior is in part attributed to enhanced generation of oxygen vacancies in the doped REOs.
Impact Of Family And School Capital On The Academic Development Of African American And Hispanic Students, Jinmei Liu
Impact Of Family And School Capital On The Academic Development Of African American And Hispanic Students, Jinmei Liu
LSU Doctoral Dissertations
This study investigated the impact of family/school capital on the academic development of African American and Hispanic students by examining four educational outcomes (math/reading achievement at the tenth grade, high school graduation, post-secondary enrollment and post-secondary degree attainment) from the tenth grade through their post-secondary education. The Education Longitudinal Study of 2002 conducted by the National Center for Educational Statistics provided the data source. Hierarchical linear regression, multilevel binary logistic regression, and logistic regression were utilized to quantify the impact of family/school capital on the educational outcomes of African American and Hispanic students. Family and school capital variables significantly impact …
Structural And Kinetic Investigations Of 15-Lipoxygenase-2, Matthew James Kobe
Structural And Kinetic Investigations Of 15-Lipoxygenase-2, Matthew James Kobe
LSU Doctoral Dissertations
Evidence suggests that 15-lipoxygenase-2 (15-LOX-2) plays an important role in the progression of atherosclerosis. Due to the medical need to discover isoform specific inhibitors of 15-LOX-2, a novel human enzyme, our goal was to determine the 3-dimensional structure. Using bacterial expression, we were able to obtain a usable quantity of enzyme with a sufficient amount of the catalytic iron bound to the enzyme, however it was sensitive to cleavage by proteases. This led to a ratio of roughly 1:1 of cleaved and uncleaved protein after the final step of purification. Solving the crystal structure revealed the reason for the protease …
The Pulpit And The Nation: Clergymen, Political Culture, And The Creation Of An American National Identity, Spencer W. Mcbride
The Pulpit And The Nation: Clergymen, Political Culture, And The Creation Of An American National Identity, Spencer W. Mcbride
LSU Doctoral Dissertations
This dissertation examines the politicization of clergymen during the American Revolution and explains the direct impact this process had on the development of a national polity and a distinct American national identity in the early republic. Both during and after the Revolution, clergymen utilized providential rhetoric and biblical symbolism to assign greater religious and moral significance to political events. Focusing on the period between 1775 and 1800, this dissertation describes and analyzes the extent to which national political leaders relied on local clergymen when securing independence and thereafter inventing a new nation. Ultimately, it argues that clergymen were essential to …
Damage Prediction Of Low-Rise Buildings Under Hurricane Winds, Fang Pan
Damage Prediction Of Low-Rise Buildings Under Hurricane Winds, Fang Pan
LSU Doctoral Dissertations
Low-rise buildings are defined as the buildings with a mean roof height less than the least horizontal dimension and less than 18.3 m in ASCE 7-10. They represent the majority of commercial, residential, and industrial buildings. Approximate 90% of the existing low-rise residential buildings are constructed as wood light-frame buildings that are not fully engineered and thus more vulnerable to extreme wind pressures, wind borne debris and rain water intrusion. The resulting hurricane-induced economic loss is primarily attributed to the insufficient performance of building envelope instead of the catastrophic failure of their main structural system for Category 1 to 4 …
Three Essays On Digital Marketing, Xia Liu
Three Essays On Digital Marketing, Xia Liu
LSU Doctoral Dissertations
This dissertation is primarily interested in finding out how marketing can play a more strategic role in helping firms to improve performance in the Digital Age. It contains three essays on digital marketing. The unifying theme is figuring out how the marketing department can benefit from the informational value of (big) data and advanced analytics and thus improve customer and business performance. The first essay develops a scale for measuring marketing information capability. The scale has passed rigorous tests standards. The second essay empirically examines the antecedents, moderators and consequences of marketing information capability. The antecedents include cross-functional coopetition between …
Numerical Investigation Of Cryopreserved Zebrafish Sperm Cell Activation In Microchannels, Thomas Foster Scherr
Numerical Investigation Of Cryopreserved Zebrafish Sperm Cell Activation In Microchannels, Thomas Foster Scherr
LSU Doctoral Dissertations
This aim of this research project is to probe the activation process of zebrafish spermatozoa. Zebrafish are a model species for biological engineering applications, and the cryopreservation of their reproductive cells allows for inexpensive cataloging and maintenance of valuable biological material. Evaluation of cryopreservation protocols for aquatic sperm cells is typically accomplished by motility analysis after subjecting cells to a cryopreservation treatment. In zebrafish sperm cells, motility is initiated when cells come into contact with a hypo-osmotic environment. Subsequent activation analysis is currently done manually and brings with it an inherent difficulty and error. This process is slow and not …
Poroelastic Inhomogeneities: Applications In Reservoir Geomechanics, Houman Bedayat
Poroelastic Inhomogeneities: Applications In Reservoir Geomechanics, Houman Bedayat
LSU Doctoral Dissertations
The scarce amount of conventional hydrocarbon reservoirs and increase of fuel consumption in the world have made production from unconventional hydrocarbon resources inevitable. Because of the low permeability of unconventional formations, fractures are the main paths for the fluid to flow. Therefore, detailed knowledge of the size, orientation, and permeability of the fracture systems are essential for reservoir engineers. Permeability of the fractures is function of their volume and opening, and stress and fluid pore pressure distribution in the formation. Since reservoir pressure may change over the production life of the reservoir, studying stress redistribution and mechanical behavior of the …