Digital Commons Network^™

Cruise Ship Ports And Human Capital Development: The Case Of Mexico, Jorge Herrera

Master's Theses

The cruise ship industry, the fastest-growing segment in the leisure travel market, has contributed significantly to the economic transformation of developing countries, particularly in the Caribbean Basin. This paper applies a difference-in-differences methodology to examine the causal impact of the introduction of cruise ship ports on human capital development in Mexico, as reflected by educational attainment. Using variations in school enrollment, segregated by gender and age across states and municipalities, I find that the economic consequences derived from this form of tourism do not translate into incremental, permanent improvements in all quality of life indicators considered, most saliently in schooling. …

The Effect Of Sex Of Firstborn Children On Fertility Preferences, Lauren Lamson

Master's Theses

Fertility rates around the world are falling at the same time that male-skewed sex ratios at birth are on the rise. The individual fertility choices people make contribute to this inverse relationship, exacerbating the problem of “missing women” as well as a number of other adverse social and economic effects. The decision to have a child is extremely complex. Distilling the interaction between fertility and sex compositional preferences, fertility levels, and gender norms is an important step toward understanding both the reproductive choices people make as well as the formation of fertility preferences. I use individual-level data from the Demographic …

Elucidating The Molecular Pathways Involved In The Fitness And Water Stress Response Of Pseudomonas Synxantha 2-79 In The Plant Rhizosphere, Clint Henry D. Pablo

Master's Theses

Pseudomonas synxantha 2-79 is a biocontrol agent that represents beneficial indigenous rhizobacteria that are broadly distributed in the Pacific Northwest, USA and flourish in the rhizosphere of commercially grown wheat under surprisingly arid conditions. The molecular adaptation of 2-79-like bacteria to plants growing in dry soils is poorly understood. We hypothesized that the ability of 2-79 to colonize and persist in the rhizosphere of water-stressed plants is underpinned by the formation of hydrating biofilms and the utilization of root exudates that contain plant-derived osmoprotectants called quaternary ammonium compounds (QACs). We tested this hypothesis by identifying waters stress response pathways in …

Malaria Risk On Ancient Roman Roads: A Study And Application To Assessing Travel Decisions In Asia Minor By The Apostle Paul, Daniel C. Browning Jr

Master's Theses

This study models malaria risks for travelers on ancient Roman roads with the goal of providing a tool for historical assessment of travel accounts from antiquity. The project includes: identification of malaria risk factors and associated spatial datasets, malaria risk model construction, verification and validation against available pre-eradication data, overlay of ancient Roman road data, and an initial case-study application to the journeys of the Apostle Paul, as narrated in the New Testament book, Acts of the Apostles (Acts). The project is intentionally cross-disciplinary in bringing the technical capabilities of GIS to the task of evaluating nuanced textual sources for …

Barriers To Health: Understanding The Barriers Faced By Community Intervention Projects, Vera Landrum

Master's Theses

Health disparities affect significant portions of the population and are most often experienced by marginalized communities (Wilkin, 2013). Health disparities are also impacted by geographical location, and hunger often affects rural areas (Dutta, Anaele, & Jones, 2013; Rural Health Information Hub, 2017). This study aims to understand how nonprofit organizations focused on addressing food insecurity disseminate information to members of the local community and how the input of community members impacted the overall food insecurity campaign. This study was conducted by interviewing five nonprofit directors and conducting three focus groups with clients of the. aforementioned organizations. The author found that …

Development Of An Attenuated Zika Virus By Editing The 5’ Untranslated Region, E. Ashley Thompson

Master's Theses

Zika Virus (ZIKV) is a mosquito-transmitted flavivirus that usually causes no symptoms to mild febrile in humans, and it has been regarded as an insignificant pathogen to public health. However, recent outbreaks of ZIKV infection have revealed that ZIKV can cause severe neurological effects in adults, such as Guillain-Barre Syndrome (GBS), and in infants whose mothers acquired the virus during pregnancy, causing Congenital Zika Syndrome (CZS). Currently, no approved vaccine is available and there is a critical need to develop an effective and safe vaccine. While most vaccine developmental strategies target the viral prM-E protein of ZIKV, we aimed to …

The Effects Of Optimism On Anti-Natalism, Faith L. Brown

Master's Theses

People sometimes hold opinions on others’ choices, particularly their reproductive decisions, as these choices are important decisions that impact the lives of multiple people. People can believe that everyone should have children (pro-natalism) or that everyone should refrain from having children (anti-natalism) or they can hold no position on the reproduction of others. The main justification for anti-natalism is that life contains more suffering than pleasure and that it would be better if new people were not born to experience this suffering. This is why some theorists argue that people reject anti-natalism irrespective of how bad …

Online And Offline Identity Gaps: Cross-Contextual Predictors And Psychological Outcome, Ningyang Wang

Master's Theses

Using Communication Theory of Identity as a framework, this study compared an individual’s online and offline personal-enacted identity gap and examined the effect of each personal-enacted identity gap on individuals’ psychological well-being, as well as tested four cross-contextual predictors for online and offline personal-enacted identity gaps.

Survey data were collected from 214 participants on Amazon M-Turk. A sequence of hypotheses was tested. A questionnaire used for measuring individuals’ online personal-enacted identity gap was generated.

The result suggested individuals experience larger personal-enacted identity gap offline, which significantly negative predict individuals’ psychological well-being, whereas online personal-enacted identity gap positively predicts psychological well-being. …

“Making The World A Better Place To Live In”: Hattiesburg Women’S Literary Organizations And The Formation Of A Progressive Southern City, 1884-1945, Daniella Kawa

Master's Theses

This study examines the activity and impact of white women’s literary clubs in Hattiesburg, Mississippi between 1884 and the end of World War II in 1945. This project examines to what extent women adhered to or broke away from societal norms of the time by involving themselves in intellectually stimulating groups with other women, especially in response to rapidly changing standards of femininity and womanhood during the Progressive era. Women’s literary clubs reveal patterns of women moving out of the home and into a public role, in addition to signifying the new ways in which women fit themselves into a …

The Development And Exploration Of A Twelve-Factor Model Of Motivations For Using Substances, Taylor Altenberger

Master's Theses

The existing literature suggests inconsistent and limited application of various salient motives to use substances across substance classes and has been further limited by only measuring substance use motives by the frequency at which one uses for a given reason. The purpose of this study was the development and initial validation of the Motivations for Substance Use Questionnaire (MUSQ). The MUSQ was intended to be a more comprehensive measure identifying motives to use that have been selectively included in some measures and expanding the breadth of substances addressed. We also aimed to index and test cognitive aspects of the motives …

“You Must Live, And Show To The World What They Have Been Doing Here”: The Survival Of The “Rabbits” Of Ravensbrück, Regina Coffey

Master's Theses

The Polish women who would later come to be known as the kroliki or “rabbits” arrived at Ravensbrück with a death sentence. As a result of their work for underground organizations back in Poland, the camp administration planned to execute them within a few years. Because the women were already intended to die, they were chosen as the subjects of experimental operations in which muscles and bones in their legs were mutilated and many of them were injected with various diseases and bacteria. Most of the rabbits survived the experiments, though many were permanently crippled, and several suffered from additional …

Vegetative Community And Health Assessment Of A Constructed Juncus-Dominated Salt Marsh In The Northern Gulf Of Mexico, Nickolas R. Murphy

Master's Theses

Deer Island is a coastal habitat which provides a buffer from storm and flood damage as well as shore-line stabilization to the mainland of Biloxi, Mississippi. A third of the land has been lost since 1850, largely driven by tropical storm and hurricane impacts as well as sea level rise. The United States Army Corps of Engineers and Mississippi Department of Marine Resources have targeted the shores of the island as sites for restoration using beneficial use dredged material, and two sites of differing age have since been planted with Spartina alterniflora, Juncus roemerianus, Uniola paniculata, S. patens, and Panicum …

A Comparison Of Power Variables For Two Loading Methods In Weighted Vertical Jumps 2020, Jonathan Tanguay

Master's Theses

Training exercises to develop muscular strength and power, such as the weighted jump squat, commonly utilize barbells and dumbbells to increase resistance. Strength coaches often measure improvements in peak force, peak power, and rate of force development to determine effectiveness of a training program. The purpose of this study was to determine if equipment selection (barbells vs. dumbbells) affects peak force, peak power, and/or rate of force development in weighted jump squats. Thirteen physically active, college-aged males (age: 21.6 ± 2.0 years, height: 182.8 ± 9.7 cm, body mass: 87.2 ± 9.0 kg, lean mass: 72.3 ± 8.1 kg) performed …

Valorization Of Carrot Processing Waste, Alexandra M. Duval

Master's Theses

Commercial carrot processors produce up to 175,000 tons of carrot waste annually. Carrot Mash (CM) is the term referring to the waste by-product of peeled baby carrot processing. Transportation of carrot processing waste is expensive due to its high- water content (approx. 83-95%). High in bioactive compounds (carotenoids) and dietary fibers, it is expected that its conversion into a value-added by-product is of interest to the carrot processing industry. Hemicellulose-rich plant materials have proven to be a source of oligosaccharides, which are known for their beneficial prebiotic activity. The objectives of this research were to: 1) determine the effect of …

Risk Factors For Poor Birth Outcomes In Moderately Malnourished Pregnant Women In Sierra Leone, Candice A. Rodriguez

Master's Theses

Background: Maternal malnutrition in developing countries is associated with adverse pregnancy and birth outcomes. Malnourished mothers are often faced with additional risk factors as a circumstance of poverty. Supplementary nutrition can improve the outcomes of both mother and infant. Identifying maternal nutritional and socioeconomic risk factors is critical for developing effective interventions.

Objective: A secondary analysis to evaluate maternal risk factors associated with poor birth outcomes including pregnancy loss, low birth weight, stunting, and preterm delivery among moderately malnourished pregnant women in Sierra Leone. Maternal risk factors in the analysis are age, education, parity, BMI, MUAC, gestational weight gain, and …

Subject-Specific Finite Element Models Of The Human Knee For Transtibial Amputees To Analyze Tibial Cartilage Pressure For Gait, Cycling, And Elliptical Training, Jonathon Stearns

Master's Theses

It is estimated that approximately 10-12% of the adult population suffers from osteoarthritis (OA), with long reaching burdens personally and socioeconomically. OA also causes mild discomfort to severe pain in those suffering from the disease. The incidence rate of OA for individuals with transtibial amputations is much than average in the tibiofemoral joint (TF). It is well understood that abnormal articular cartilage stress, whether that be magnitude or location, increases the risk of developing OA. Finite element (FE) simulations can predict stress in the TF joint, many studies throughout the years have validated the technology used for this purpose. This …

Fruit, Flower, And Thorn: A Phenological Study Of 'Wonderful' Pomegranate, Kylie M. Mendonca

Master's Theses

‘Wonderful’ pomegranate flowering and fruiting habits are not well understood. Characterizing any relationship between flowering habit and fruit size and quality could lead to effective cultural practices for producing high-value fruit. Five mature ‘Wonderful’ pomegranate trees were monitored every 5-14 days throughout the 2015 growing season. Newly emerged flowers were tagged and characterized with respect to sex (determined by ovary shape and style length at anthesis), clustering habit, age of wood on which floral buds were borne, and direction of wood growth. More than 1,100 hermaphroditic flowers were identified and ovary/fruit diameter was recorded throughout the season. In addition to …

Methods To Increase Algae Biomass Productivity In Raceway Pond Monocultures, Ryan S. Anderson

Master's Theses

The economics of algae biofuels and bioproducts would be improved by increased biomass productivity. Two studies on this potential are described in this thesis – one on a locally isolated filamentous yellow-green alga and the other on a planktonic strain genetically improved via selective enrichment.

Polycultures have been viewed as productive, stable, and, in some cases, harvestable by natural bioflocculation. Local native strains might have higher productivity than culture collection strains because they are already adapted to local outdoor conditions. In this study, the filamentous yellow-green alga Tribonema minus was isolated from a local volunteer polyculture. Its productivity as a …

Skier's Edge: Biomechanical Analysis, Benjamin T. Johannes

Master's Theses

ABSTRACT

Skier’s Edge: Biomechanical Analysis

Benjamin T. Johannes

The Skier’s Edge trainer can be used by novice or expert skiers. Testing was performed to analyze if the use of the Skier’s Edge could reduce in shear forces of the valgus moment on the knee joint and anterior cruciate ligament (ACL) due to lesser fatigue of muscle and a higher hamstring to quadricep (H/Q) ratio activity. This leads to a reduction of improper form and an increase in balance. Experiments performed observed the change in muscle activity with the use of the Skier’s Edge over time when compared to other forms …

Use Of Body Composition Imaging To Calculate 3-D Inertial Parameters For Inverse Dynamic Analysis Of Youth Pitching Arm Kinetics, Dalton James Jennings

Master's Theses

The objectives of this study were to 1) calculate participant-specific segment inertial parameters using dual energy X-ray absorptiometry (DXA) data (referred to as full DXA-driven parameters) and compare the pitching arm kinetic predictions using full DXA-driven inverse dynamics vs scaled, DXA mass-driven (using DXA masses but scaled centers of mass and radii of gyration), and DXA scaled inverse dynamics(ID) (using the full DXA-driven inertial parameters averaged across all participants), 2) examine associations between full DXA-driven kinetics and body mass index (BMI) and 3) examine associations between full DXA-driven kinetics and segment mass index (SMI). Eighteen 10- to 11- year-olds pitched …

Insulative (Direct Current) Dielectrophoretic Foul-Less Filtration In Microfuidic Systems, Matthew A A Whitman

Master's Theses

Filtration is a technology that is used almost ubiquitously in society from uses raging from filtration of macroparticles from water to pharmaceutical grade filtration products to remove anything larger than a protein. However, with such a wide range of uses, most filtration products have the same issue; membrane clogging (fouling) that prevents continuous use and requires frequent maintenance. This thesis hypothesizes that by applying a direct current (DC) to an insulating array of posts, they will create a foul-less insulative dielectrophoretic filter (iDEP) that does not clog since particles will levitate above the insulating array.

This thesis tested an inherited …

Inactivation Of Foodborne Pathogens During Cider Fermentation, In A Cider Model System And Commerical Cider, Kathryn K. Yamada

Master's Theses

Hard cider is an alcoholic drink made from fermented crushed fruit, typically apples. The popularity of this fermented alcoholic beverage has been on the rise within the last decade. Historically, hard cider has been deemed safe due to the presence of ethanol and the low pH. Although there is lack of scientific evidence to prove that hard cider will and can be safe from foodborne pathogens. Escherichia coli O157:H7, Salmonella spp., and Listeria monocytogenes are three predominate foodborne bacterial pathogens of concern in the food and beverage industry. Escherichia coli O157:H7 in particular has been associated with fresh produce and …

Electrochemical Detection Of Reactive Oxygen Species Via A Platinum Microelectrode Array, Victor M. Carriere Jr.

Master's Theses

Oxidative stress, an excess of endogenous or exogenous reactive oxygen species (ROS) in the body, is closely aligned with inflammatory responses. ROS such as hydrogen peroxide, superoxide, and radical hydroxyl ion serve essential functions in fighting infection, but chronic elevation of these species irreversibly damages cellular components. Given the central role of inflammation in a variety of diseases, including Alzheimer’s Disease, atherosclerosis, and rheumatoid arthritis, a low-cost, extracellular, non-invasive assay of ROS is needed.

This work reports the use of a platinum microelectrode array (Pt MEA)-based ceramic probe to detect time- and concentration-dependent variations in hydrogen peroxide (H2O2) production by …

The Effect Of Time-Restricted Feeding On Body Weight, Energy, Mood, Sleep, And Hunger Levels Of Adults On Social Media, Rachel Elizabeth Haines

Master's Theses

The purpose of this study was to investigate the effect of time-restricted eighthour feeding on body weight, self-reported energy, mood, and hunger scores, and selfreported sleep patterns of adult men and women on social media. Generally healthy adults ages 18 to 65 were invited on social media to participate in a five-week study which involved a one week of following their normal dietary patterns succeeded by four weeks of practicing time-restricted feeding of eight hours per day, also known as 16 hours of fasting. Daily surveys were created in Survey Monkey and distributed through the messaging platform, Remind, that gathered …

A Multi-State Evaluation Of The Knowledge Of The Background And Dangers Of Popular Fad Diets Among Cooperative Extension Agents In Family And Consumer Sciences, Abigail Paige Mcalister

Master's Theses

Cooperative extension provides communities with research-based information in several areas including family and consumer sciences (FCS) (Franz & Townson, 2008). Because FCS agents teach communities about dietary guidelines, it is important that they are aware of the latest nutrition research. This study assessed the knowledge of popular fad diets and their potential adverse effects among FCS cooperative extension agents, and its relationship among the variables of location, professional certifications held, years of extension work experience, membership in professional associations, and education level. FCS extension agents in Louisiana, Texas, Arkansas, and Mississippi were emailed an online survey, which collected demographics and …

Using Moral Foundations Framing To Influence Partisan Attitudes Toward Latino Immigrants, Salma Moaz

Master's Theses

This study aims to use Moral Foundations Theory to reduce prejudiced attitudes towards Latino immigrants. Research has shown that liberals and conservatives tend to differ in their support of moral foundations. Liberals are more likely to endorse individualizing moral foundations (fairness and caring for others) while conservatives are more likely to endorse binding moral foundations (sanctity, loyalty, and authority). Participants read one of two brief messages in support of Latino immigrants framed in either the binding or individualizing morals. the hypothesis was that conservatives who read the binding message will have more pro-immigrant attitudes, be more supportive of pro-immigrant policies, …

Red Blood Cell Biomechanics In Myalgic Encephalomyelitis/Chronic Fatigue Syndrome, Arun Kumar

Master's Theses

Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is characterized by severe fatigue, impaired cognition, and discomfort. Unfortunately, the etiology and pathogenesis of the disease are not well understood, and there are no diagnostic biomarkers. Early studies have shown that the red blood cells (RBC) in ME/CFS patients have poor filterability. This finding has been implicated in impaired microvascular oxygenation, which may contribute to post exertional malaise and profound fatigue. We hypothesized that RBC biomechanics in patients with ME/CFS are significantly different from those in healthy controls. To test this hypothesis, we use a microfluidic device with microchannels that are narrower than the …

Prediction Of Novel Antibiofilm Peptides From Diverse Habitats Using Machine Learning, Bipasa Bose

Master's Theses

Multidrug resistant bacteria often lead to biofilm formation. Biofilm is a colonizedform of pathogens (fungi, bacteria) attached to surfaces like animal or plant tissues, medical devices like catheters, and artificial heart valves. Biofilm formation prolongs the survival of microorganisms in an adaptive environment, leading to the spread of infection in different organs and causing a high morbidity rate. Given the rise of chronic infection and antibiotic resistance due to biofilm, it is essential to find an alternative solution to control biofilm infections. Antibiofilm peptides can interact with these biofilm-creating pathogens to inhibit growth, virulence, and biofilm formation. We hypothesized that …

The Impact Of Berrien Springs Water Types On Multiethnic Hair Textures, Ralna M. Simmonds

Master's Theses

This thesis documents an explorative study into the effect of water from various Berrien Springs water sources on the multiethnic hair texture of Andrews University students/faculty. Participants were living in the area for at least five months, whether originally from the United States or other countries of the world. The theory informing this study is the Expectancy Violations Theory (EVT) by Burgoon (1976). EVT is a communication theory that examines the reaction to behaviors within nonverbal communication that are expected or unexpected in a positive or negative light. In this context EVT has not been used to examine nonverbal communication, …

The Influence Of Jesus' Approach To People Through "Teaching And Healing" On The Faith Of People In Jesus Christ And On Their Relationship To The Seventh-Day Adventist Church, Armin Danz

Master's Theses

The problem underlying this study is the slow but steady decline in membership in the Seventh-day Adventist Church in the German state of North Rhine-Westphalia. Numerous missionary efforts in the past have not been able to change this trend. However, an approach that summarizes the work of Jesus in the Gospel of Matthew has not been followed: Namely that Jesus taught people about the Kingdom of God and healed them through prayer. Both church historical sources and modern research suggest that wherever the biblical example of Jesus was followed closely it had a positive influence on the growth of churches. …