Digital Commons Network^™

Extension Agriculture And Natural Resources In The U.S. Midwest: A Review And Analysis Of Challenges And Future Opportunities, Mahdi M. Al-Kaisi, Roger Wesley Elmore, Gerald A. Miller, David Kwaw-Mensah

Department of Agronomy and Horticulture: Faculty Publications

This review addresses key changes in U.S. agricultural extension and future opportunities. Agricultural extension has been a part of the land-grant university (LGU) system for more than 100 years. The Morrill Act of 1862 established the LGU system by authorizing states access to federally controlled land and funding for public institutions offering educational opportunities focusing on agriculture and mechanical arts for farmers and the working class. Current surveys in Iowa reveal changing trends in extension: more than 90% of farmers identified private-sector crop advisers as their primary source for recommendations, whereas more than 80% of those advisors identified Iowa State …

Assessment Of Selected Antibiotic Resistances In Ungrazed Native Nebraska Prairie Soils, Lisa M. Durso, David A. Wedin, John E. Gilley, Daniel N. Miller, David B. Marx

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

The inherent spatial heterogeneity and complexity of antibioticresistant bacteria and antibiotic resistance (AR) genes in manureaffected soils makes it difficult to sort out resistance that can be attributed to human antibiotic use from resistance that occurs naturally in the soil. This study characterizes native Nebraska prairie soils that have not been affected by human or food-animal waste products to provide data on background levels of resistance in southeastern Nebraskan soils. Soil samples were collected from 20 sites enumerated on tetracycline and cefotaxime media; screened for tetracycline-, sulfonamide-, b-lactamase–, and macrolide-resistance genes; and characterized for soil physical and chemical parameters. All …

Improving Energy Sustainability In Electrical Vehicle Energy Networks And Internet Of Things, Abdurrahman Arikan

Doctoral Dissertations

Energy sustainability is a pressing issue facing the modern society. The twin pillars of sustainable energy are renewable energy and energy efficiency. In this dissertation, we propose novel architectures and approaches to improve energy sustainability in two application domains: transportation and the Internet of Things. Transporta- tion is one of the major sources of energy consumption and environmental pollution. Plug-in hybrid electric vehicles (PHEVs) present many opportunities in improving energy efficiency and reducing greenhouse gas emissions. In addition, with batteries and built-in mobility, PHEVs can form a mobile and distributed energy network, where energy can be conveniently transported from place …

Temperature Dependent Characterization And Crystallization Dynamics Of Ge2sb2te5 Thin Films And Nanoscale Structures, Kadir Cil

Doctoral Dissertations

Phase change memory (PCM) is currently seen as the most promising candidate for a future storage-class memory with the potential to be as fast as Dynamic Random-Access Memory but with much longer retention times, and as dense as flash memory but significantly faster due to unique material properties which include strong electrical resistivity contrast, fast crystallization and high crystallization temperature. PCM devices utilize chalcogenide materials (most commonly Ge₂Sb₂Te₅, or GST) that can be reversibly and rapidly switched between amorphous and crystalline phases (enabling storage of information) with orders of magnitude difference in electrical resistivity. …

Flame Combustion Synthesis Of Nano-Materials For Catalysts And Sensors, Rishabh Jain

Doctoral Dissertations

Synthesis of functional nanomaterial thin films using a scalable flame combustion technique called Reactive Spray Deposition Technology (RSDT) was explored. Nanomaterials were used as sensing film for local gas monitoring and human breath analysis for medical diagnosis (different phases of WO₃) and catalysts for water-gas shift (WGS) reaction (Pt supported on ceria). Areas of application include: handheld portable devices for immediate breath composition monitoring, medical diagnosis, and environment monitoring (workplace, residence and automobile). Two case studies will be explained in detail: (1) acetone sensing in human breath for blood glucose monitoring and (2) NO₂ sensing for air …

Cooperative, Cognitive And Coordinated Communications For Underwater Acoustic Networks, Yu Luo

Doctoral Dissertations

Underwater acoustic networks (UANs) have a wide range of applications. However, UANs face grand challenges on the narrow communication bandwidth. To tackle this issue, in this dissertation, I explore three critical techniques: cooperative communications (COP-COM), cognitive communications (COG-COM) and coordinated communications (COD-COM), to improve acoustic spectrum usage.

In the first research thread, I propose a new relay selection criterion, called cooperative best relay assessment (COBRA), for underwater COP-COM. COBRA takes into account not only the spectral efficiency but also the long propagation delays of acoustic signals. In addition to COBRA, I develop a new cooperative scheme, called mirror node assisted …

Real System Features And Implications In Underwater Acoustic Networks, Lina Pu

Doctoral Dissertations

As an emerging research area, underwater acoustic network (UAN) has attracted tremendous interests from both academia and industry in recent years. However, little work has been conducted to test algorithms and protocols in real sea experiments. Due to the complexity of acoustic environments and the uncertainties in acoustic systems, it is difficult for theoretical studies or simulations to evaluate UANs in the real world. Studying real system features of UANs has become crucial in the field.

In this dissertation, I study the real system features revealed in sea tests and analyze their impact on underwater media access control (MAC), time …

Bodipy-Based Fluorescent Probes For Sensing Protein Surface-Hydrophobicity, Nethaniah Dorh, Shilei Zhu, Kamal B. Dhungana, Ranjit Pati, Fen-Tair Luo, Haiying Liu, Ashutosh Tiwari

Department of Chemistry Publications

Mapping surface hydrophobic interactions in proteins is key to understanding molecular recognition, biological functions, and is central to many protein misfolding diseases. Herein, we report synthesis and application of new BODIPY-based hydrophobic sensors (HPsensors) that are stable and highly fluorescent for pH values ranging from 7.0 to 9.0. Surface hydrophobic measurements of proteins (BSA, apomyoglobin, and myoglobin) by these HPsensors display much stronger signal compared to 8-anilino-1-naphthalene sulfonic acid (ANS), a commonly used hydrophobic probe; HPsensors show a 10- to 60-fold increase in signal strength for the BSA protein with affinity in the nanomolar range. This suggests that these HPsensors …

Restoring The Mississippi River Delta In Louisiana Ecological Tradeoffs And Barriers To Action, Alison Maulhardt

LSU New Orleans Theses and Dissertations

This study investigates the Louisiana 2012 Coastal Master Plan’s ability to reconcile conflicting economic and ecological demands on coastal resources. The Louisiana Coastal Master Plan was unique in combining flood control and coastal restoration under one authority. However, the objectives of flood control and coastal restoration can be in conflict. The plan was also unique in its approach of restoration from a working coast perspective. However, the objectives of ecological restoration and economic productivity do not always agree. By conducting semi-structured interviews with major coastal stakeholders, this research will explore how the planning process has accommodated the views and values …

Beyond Access To Education: Using Collaborative Learning To Promote Agency In Unauthorized Latinos Entering Community College, Amanda C. Price

Master's Projects and Capstones

The US is widely recognized as a nation of immigrants; however, when an estimated 70,000 unaccompanied child migrants arrived from Central America in 2014, unauthorized immigration became a full-blown humanitarian crisis. Unauthorized immigrants, 71% of whom come from Mexico and Central America, make up an increasingly significant portion of the population. This is particularly true in California, where 28% of unauthorized immigrants reside. However, despite the overwhelming consensus that command of English is paramount to a successful life in the US, an alarming 51% of unauthorized immigrants speak English “not well” or “not at all”.

Unauthorized immigrants face unique challenges …

Photooxidation Reactions Of Small-Chain Methyl Esters, Aerosol Photoelectron Spectroscopy, And The Photodissociation Of Ethylenediamine, Giel Muller

Master's Theses

Research conducted at the University of San Francisco is presented within this masters thesis, including the Cl-initiated photooxidation reactions of methyl propanoate, methyl butanoate, and methyl valerate (pentanoate), the aerosol photoelectron spectroscopy of isoprene and gamma-valerolactone, and the TPEPICO investigation of ethylenediamine. Experiments were conducted at the Lawrence Berkeley National Lab Advanced Light Source (ALS), the National Synchrotron Radiation Research Center in Hsinchu City (NSRRC), and the University of Stockton in California, respectively.

Stabilized Least Squares Migration, Graham Ganssle

LSU New Orleans Theses and Dissertations

Before raw seismic data records are interpretable by geologists, geophysicists must process these data using a technique called migration. Migration spatially repositions the acoustic energy in a seismic record to its correct location in the subsurface. Traditional migration techniques used a transpose approximation to a true acoustic propagation operator. Conventional least squares migration uses a true inverse operator, but is limited in functionality by the large size of modern seismic datasets. This research uses a new technique, called stabilized least squares migration, to correctly migrate seismic data records using a true inverse operator. Contrary to conventional least squares migration, this …

The Cobbler And The Diamond, Jacob M. Hoyson

LSU New Orleans Theses and Dissertations

This paper will provide a comprehensive account of the making of the University of New Orleans Graduate Thesis film The Cobbler and the Diamond. The first part will cover the filmmaker’s intentions, the development of the story, and the screenwriting process. The second part will break down the preproduction and planning phase, with an emphasis on the collaborations between the director and other members of the film’s cast, crew, and other concerned parties. The third part will describe the seven-day shoot of The Cobbler and the Diamond, the fourth will cover post production, and the fifth and final …

Exit, Promising, Stephanie Doyle

LSU New Orleans Theses and Dissertations

A collection of short stories.

A Simulation Of The Mississippi River Salt Wedge Estuary Using A Three-Dimensional Cartesian Z Coordinate Model, Steven K. Ayres

LSU New Orleans Theses and Dissertations

The stratified flow of the lower Mississippi River due to density gradients is a well documented phenomenon. This stratification of fresh and saline water manifests itself as a heavier wedge of saline water that extends upriver and a buoyant fresh water plume extending into the Gulf of Mexico past the Southwest Pass jetties. The maximum absolute distance of saltwater intrusion observed anywhere in the world occurred on the Mississippi River in 1939 and 1940 when saltwater was observed approximately 225 km upstream from the mouth of Southwest Pass. The U. S. Army Corps of Engineers now prevents the wedge from …

Parameterized Spectral Bathymetric Roughness Using The Nonequispaced Fast Fourier Transform, David H. Fabre

LSU New Orleans Theses and Dissertations

The ocean and acoustic modeling community has specifically asked for roughness from bathymetry. An effort has been undertaken to provide what can be thought of as the high frequency content of bathymetry. By contrast, the low frequency content of bathymetry is the set of contours. The two-dimensional amplitude spectrum calculated with the nonequispaced fast Fourier transform (Kunis, 2006) is exploited as the statistic to provide several parameters of roughness following the method of Fox (1996). When an area is uniformly rough, it is termed isotropically rough. When an area exhibits lineation effects (like in a trough or a ridge line …

Arsenic, Cadmium, Copper, And Zinc Levels In Crayfish From Southwest Louisiana And Atchafalaya Basin, E. Gerald Hebert

LSU New Orleans Theses and Dissertations

Heavy metal contamination in food is a worldwide concern. Man-made ponds are domestic sites in the production of Procambarus clarkii and Procambarus zonangulus, two edible species of crayfish. Ponds may be constructed in former sugar cane or rice fields. Crayfish farming is an ancillary seasonal business within the rice-growing season. The use of products to control insects, pests, and weeds in rice and sugar cane production, may cause an accumulation of heavy metals in the crayfish tail within pond structures. Arsenic, cadmium, copper, and zinc are heavy metals that are absorbed through the roots of and distributed through rice products. …

An Assessment Of The Accuracy Of The Euler-Bernoulli Beam Theory For Calculating Strain And Deflection In Composite Sandwich Beams, Qhinhon D. Ho

LSU New Orleans Theses and Dissertations

This study focuses on assessing the accuracy of the Euler-Bernoulli beam theory as computational bases to calculate strain and deflection of composite sandwich beam subjected to three-point and four-point bending. Two groups of composite sandwich beams tests results will be used for comparison purposes. Mechanical properties for the laminated skin are provided by researchers from University of Mississippi (Ellen Lackey et al., 2000). Mechanical properties for the balsa wood core are provided by Alcan Baltek Corporation. Appropriate material properties and test geometries are then used in the Euler-Bernoulli-based algorithm in order to generate analytical data for comparison to experimental data …

Amyloid Proteins Structure, Dynamics, Interactions And Early Stages Of Self-Assembly, Yuliang Zhang

Theses & Dissertations

The self-assembly and aggregation of amyloid protein are associated with several neurodegenerative diseases. The evidence indicates that the oligomeric intermediates, formed prior to the final fibrillary product, are the primary culprits of neurotoxicity. Although tremendous efforts have been dedicated for the characterization of structures, dynamics and toxic-related hallmarks of the oligomers, to date, yet the mechanism of such assembly from disordered monomers and their structure remain elusive.

In this dissertation, I focused on understanding the dimerization process of amyloid proteins and peptides of different sizes and I combined experimental studies with high-power computer simulations. The AFM force spectroscopy experiments showed …

Postural Responses To Perturbations Of The Vestibular System During Walking In Healthy Young And Older Adults, Jung Hung Chien

Theses & Dissertations

It has been shown that approximate one-third of US adults aged 40 years and older (69 million US citizens) have some type of vestibular problems. These declining abilities of the vestibular system affect quality of life. Difficulties in performing daily activities (dressing, bathing, getting in and out of the bed and etc.) have been highly correlated to loss of balance due to vestibular disorders. The exact number of people affected by vestibular disorders is still difficult to quantify. This might be because symptoms are difficult to describe and differences exist in the qualifying criteria within and across studies. Thus, it …

The Role Of Genetic Alterations In Tumor Initiation, Progression And Transformation, Weiwei Zhang

Theses & Dissertations

Follicular lymphoma (FL) is the second most common lymphoma in the United States. Although it is generally an indolent lymphoma, FL is not curable, and, in about 30% of patients, the FL undergoes transformation into an aggressive lymphoma (tFL) with marked worsening of prognosis. To identify mutations preferentially present in tFL, we performed whole exome sequencing (WES) on paired FL and tFL arising in the same patients and developed a mutational analysis pipeline. After we identified potentially important genes that have been found to be mutated in our paired FL and tFL study, we constructed a custom capture platform including …

Control Of The Basal Recycling And Surface Expression Of Epidermal Growth Factor Receptor By The Endocytic Recycling Regulator Ehd1 Utilizing A Pathway Shared By Rusc2, Eric Tom

Theses & Dissertations

The epidermal growth factor receptor (EGFR) is a prototype receptor tyrosine kinase (RTK) and oncogene aberrantly expressed or mutated in solid tumors. Its surface expression is dynamically regulated. Display of an activation-competent pool is essential for response to ligands. Internalization and degradation of EGFR following stimulation has received the most attention, fewer studies have characterized the recycling arm of EGFR transit, basal traffic and surface display are poorly understood. Thus, we evaluated the endocytic recycling of EGFR for its therapeutic potential in EGFR driven cancers. The C-Terminal Eps15 homology (EH) domain-containing proteins have emerged as regulators of surface receptor recycling …

Mechanisms Of Hepatitis C Viral Resistance To Direct Acting Antivirals, Asma Ahmed, Daniel J. Felmlee

Peninsula Medical School

No abstract provided.

Observations On Prey-Capture Behavior Of Androctonus Crassicauda (Olivier, 1807) (Scorpiones: Buthidae) In Northern Iraq, Alexander K. Stewart

Euscorpius

Modern studies of scorpion prey-capture behavior have included several genera from a variety of habitats and have demonstrated that scorpions have a limited, yet similar, repertoire of reactions towards their prey. These experiments, however, by necessity have dealt with scorpions under the ecologically artificial conditions of an indoor laboratory. The experimental design presented here included both indoor and outdoor laboratory experiments to study the prey capture in Androctonus crassicauda (Olivier, 1807). Thirty indoor and twenty outdoor experiments recorded scorpion activities from initial prey recognition to prey ingestion. By experimenting with this indigenous species in its harsh environment (an outdoor laboratory, …

The Environmental Impacts Of Colonialism, Lawrence Wood

Honors Program Theses and Projects

The politics of the global imperial era are having real-world environmental consequences globally, especially in the former colonies. Indifferent administration by overseas imperial powers transparently sought to enrich their home country with little to no thought about the long term environmental or political consequences for the colony. One of the main objectives of global imperialism, from the first Spanish colonies to the last of the British and Portuguese colonies, was the enhanced profitable extraction of resources. The industrial revolution fueled the need for colonial resource extraction. Industrialization and imperialism formed a positive feedback loop, in which one created a greater …

Impact Of Executive Order 13211 On Environmental Regulation: An Empirical Study, Elizabeth Ann Glass Geltman

Publications and Research

A great deal has been written about the Energy Policy Act of 2005 exempting oil and gas operations using hydraulic fracturing from the purview of certain federal environmental laws. Far less attention has been paid to George W. Bush’s Executive Order 13211 (EO 13211), entitled “Actions Concerning Regulations that Significantly Affect Energy Supply, Distribution or Use.” The executive order requires federal agencies to evaluate the impact of federal regulations on “supply, distribution and use of energy.” This study examined the impact of EO 13211 on United States environmental and conservation regulations proposed and promulgated by federal agencies. The study found …

Herath Heads Into Her Home Stretch, Ryan Upshaw

University of Mississippi News

Geological engineering, physics major has completed summer internships, NCPA research project

Undergraduate Research Assistant To Present | Eed, Usu College Of Engineering

College of Engineering News

Steven Wood, an undergraduate research assistant working with Dr. Wade Goodridge in Engineering Education has been accepted to present research at this year’s upcoming Utah Conference on Undergraduate Research (UCUR) located at the University of Utah on February 19th, 2016. He will present research on Spatial Ability and its improvement in a Statics curriculum, a new and leading edge of spatial research that has potential impacts on how we educate our engineering students.

Dr. Goodridge stated “I am very happy that Steven has engaged in this work with me as we need to disseminate to the public the importance that …

Undergraduate Research Assistant Receives Eurp | Engineering Education, Usu College Of Engineering

College of Engineering News

Steven Wood, an undergraduate research assistant working with Dr. Wade Goodridge in Engineering Education has been awarded an EURP for this coming year to engage in research in spatial thinking. Steven will work with over a year of collected spatial ability data to discover the significant gains student achieve in it after completing a Statics course. Spatial ability includes the ability to mentally comprehend an object, diagram, model, etc. and be able to manipulate and visualize it in the mind. Numerous studies have found strong evidence that supports the correlation of high spatial ability to success in STEM coursework and …

Five Year Institutional Master Plan, Uc Hastings College Of The Law

Long Range Campus Planning Archive

No abstract provided.