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More Than Whoever Made You Suffer: A Culturally-Informed Trauma-Focused Intervention For Latina Adolescents, Katherine Helena Valadez-Sanchez

Dissertations

This dissertation study explored how the integration of common Latino cultural values within Trauma-Focused Cognitive Behavioral Therapy (TF-CBT) influenced the treatment outcomes of Latina adolescents with a history of trauma. Latino adolescents and their parents often experience great difficulties in attempting to access effective mental health services that are sensitive to their cultural needs. Therefore, the present study sought to understand the impact of participation in Culturally-Modified Trauma-Focused Treatment (CM-TFT) on working alliance, therapeutic engagement, and overall posttraumatic stress disorder (PTSD) symptomatology. In this mixed methods study, four adolescents and two mothers participated in CM-TFT. A self-report scale to measure …

The Effectiveness Of Dialectical Behavior Therapy-Based Group Skills Training In A Traditional High School Setting, Emily Oros

Dissertations

Many adolescents in America suffer from serious symptoms related to borderline personality disorder (BPD) such as self-harming and suicide attempts. These reasons alone provide a strong case for researching effective therapies for adolescents with borderline traits. One treatment for BPD called dialectical behavior therapy (DBT) has been demonstrated to be empirically effective; however, in its current form DBT requires significant amounts of time, clinical training, and resources to carry out. Comprehensive application of DBT is too time intensive and cost prohibitive for some agencies to implement. The purpose of this study was to test the effectiveness of the DBT group …

Academic Stress And Working Memory In Elementary School Students, Maile Maria Blashill

Dissertations

Although it is sometimes believed that children do not suffer from stress and its negative consequences as adults do, children are equally affected by the harmful potential of excess stress. Because childhood is a period of rapid neurological growth, the effects of unnecessary stress may be more pronounced and enduring throughout the individual’s life. Past investigations suggest that individuals who experience excessive levels of psychological stress associated with anxiety show reduced executive functioning, especially within the area of working memory ability. Further, poor working memory has been shown to affect educational achievement across many different academic subjects. The purpose of …

Oxytocin: Biomarker Of Affiliation And Neurodevelopment In Premature Infants, Ashley Marie Weber

Dissertations

The purpose of this study is to 1) describe oxytocin levels in plasma, urine, and saliva in premature infants through 34 weeks gestation and 2) determine if oxytocin levels vary with maternal-infant interaction, neurobehavioral organization, and infant stress exposure. Thirty-seven premature infants, born gestational ages 25-28 6/7 weeks, were longitudinally followed until 36 weeks gestation. Plasma and urine samples were collected at 14 days of life, then weekly until 34 weeks. Data on infant and environmental variables were abstracted from the electronic medical record. Infant social engagement behaviors was measured by the Parent-Child Early Relational Assessment, during a videotaped feeding …

Teacher Perspective And The Impact Of Using Formative Assessments On Climate And Achievement In Middle School English Language Arts, Yolanda Alovor

Dissertations

A descriptive case study was conducted to examine how teachers' perception of a positive school climate and effective use of formative assessment practices impacts their students’ learning as measured by a state level standards-based assessment. Data collection included (a) two surveys; (b) an e-interview collected from eight 7th and 8th grade core teachers from a suburban public Midwestern middle school utilizing expeditionary learning related to their use of formative assessment practices and school climate; and (c) their student (N = 178) results on the Smarter Balanced English Language Arts assessment. Study results showed that grade 7 and 8 core teachers …

Applying Active Learning Strategy To The Teaching Of History Within A Multigenerational Community College Classroom, Zachary John Zweigle

Dissertations

Community colleges nationwide struggle with retention and completion of students. The role of two-year institutions is further complicated by the multigenerational diversity of learners. Community college instructors should be prepared to educate students ranging from the traditional-age digital native to a life-long learner 80 or more years in age. Creating a learning environment inclusive of generational learners is central to the mission of the community college. This quantitative study was grounded in two theoretical frameworks. First, Bandura’s (1986) social cognitive learning theory provided an understanding for student learning in the social environment. Second, Schön’s (1973) organizational learning theory provided an …

Piloting A Screening Tool For Eating And Eating-Related Behavior, Michael N. Reynolds

Dissertations

Obesity is a common medical condition associated with negative health and social outcomes. Obesity has a primary malleable behavioral cause, eating more calories than are metabolized. While metabolic rate is malleable with exercise, eating can more quickly add calories than exercising can subtract them. In the past, behavioral weight-loss treatment studies relied on multi-component package interventions that have shown reliable patterns of participant weight-loss during treatment and weight-regain in follow-up. Those findings could be conceptualized as an ABA withdrawal design, eating behavior returns to baseline after the prosthetic contingencies of the treatment study are withdrawn. We must develop ways to …

Preservice Science Teachers’ Pedagogical Content Knowledge For Nature Of Science And Nature Of Scientific Inquiry: A Successful Case Study, Gunkut Mesci

Dissertations

The purpose of this dissertation project is to explore preservice science teachers’ development of pedagogical content knowledge (PCK) for targeted aspects of nature of science (NOS) and nature of scientific inquiry (NOSI). Through multiple data sources, it is examined how preservice science teachers’ understanding of NOS and NOSI have changed over the program, and manifests itself in their classroom practice. This is an exploratory multiple case study of participants’ experiences and developments during a teacher development program. Data is collected in the form of open-ended surveys, interviews, observations, lesson plans, video materials, and teaching documents. After all data is collected, …

Sensing Gyroscopic Properties Of Rotating Magnetic Nanoparticles In Solution, Brian Gerald Krug

Dissertations

A new sensor using magnetic nanoparticles and rotating magnetic fields has been developed. By spinning the nanoparticles in a rotating magnetic field, it is feasible to infer angular position and inertia if an external force is applied to the system. The nanoparticles are treated as a multitude of miniature gyroscopes whose overall effect can be combined as one single gyroscope. Two sensors were built to test the feasibility, both containing Fe3O4 nanoparticles.

The typical input current was 250 milliamps. When the sensor deviated from its magnetic axis by a small angle, the input current changed between 1 and 2 milliamps …

Flexographic Printing Of Conductive Silver Inks Onto Pdms: Surface Treatment And Novel Processes For Creating Printed Electronic Devices, Michael James Joyce

Dissertations

For the continued advancement of the field of printed electronic (PE), there is a need for a better understanding of the interactions between functional inks and substrates, which is required to optimize printability, mechanical, and functional properties for the creation of more robust and efficient printed devices. This body of work aims to advance the knowledge of the material properties of poly-di-methyl-siloxane, PDMS, films, their interactions with flexo inks, and their flexographic printability. As the printing of metals (i.e., Ag & Au) is a known area of interest pertaining to PE, this work focused on the characterization and optimization of …

N-Terminal Domains Of Copper Atpases In Plasmodium Falciparum, Dictyostelium Dicsoideum, Human Atp7b And A Chimera Of Atox1 With Metal Binding Domain Four Of Atp7b, Javan Kilango Kisaka

Dissertations

Copper transporting ATPases (Cu-ATPases) are essential for mediating copper uptake, maintaining cellular copper levels and prevention of accumulation of toxic copper. The most studied copper ATPases are the Menkes and Wilson proteins in eukaryotes, CopA and CopB found in bacteria. The precise interaction of the metal binding domains with their copper donor, the association of each metal binding domain within the N-terminal portion of the protein, how they communicate with each other, and the eventual metal ion translocation across the membrane, is little known. The variation in number of the cytosolic metal binding domains may also offer clues on the …

Development And Evaluation Of Matrix Material Formulations For Potential Integration Into Immunodiagnostic Biosensors, Payam Aminayi

Dissertations

This study supports the development, characterization and optimization of biosensor material formulations for immunodiagnostic applications based on experimental findings and hypotheses by Wang and Wu [1, 2], and using a test-plate apparatus and thin-film design developed by Young [3].

Certain biosensors working on the basis of conductance/impedance changes have demonstrated their potential to detect various bacteria, enzymes, and biomolecules due to their enhanced electrical properties with incorporated single-walled carbon nanotubes (SWNT). From the work conducted in our laboratory, we are attempting to determine and develop a matrix formulation containing highly dispersed SWNT, antibody and other components that elicit a significantly …

A Data Science Approach To Pattern Discovery In Complex Structures With Applications In Bioinformatics, Lei Hua

Dissertations

Pattern discovery aims to find interesting, non-trivial, implicit, previously unknown and potentially useful patterns in data. This dissertation presents a data science approach for discovering patterns or motifs from complex structures, particularly complex RNA structures. RNA secondary and tertiary structure motifs are very important in biological molecules, which play multiple vital roles in cells. A lot of work has been done on RNA motif annotation. However, pattern discovery in RNA structure is less studied. In the first part of this dissertation, an ab initio algorithm, named DiscoverR, is introduced for pattern discovery in RNA secondary structures. This algorithm works by …

Oxidation Kinetics Of Metallic Powders, Hongqi Nie

Dissertations

Aluminum and magnesium are widely used in pyrotechnic formulations and other energetic materials; they are also common components of reactive alloys, e.g., Al-Mg and B-Mg, and others, which are potential fuels for explosives and propellants. Reaction mechanisms and oxidation kinetics of aluminum, magnesium and Al-Mg alloy powders in different oxidizing environments are investigated using thermo-analytical measurements. New methods of data processing are developed, relying on measured particle size distributions of the reactive spherical powders. It became possible to identify the reaction interface location for many heterogeneous metal oxidation processes; for several reactions, detailed kinetic descriptions are obtained.

For aluminum powders, …

Thermochemical Properties Of Fluorinated Hydrocarbons, Hydroperoxides, And Fluorinated Hydroperoxides; Thermochemistry And Kinetics On Dissociation And Association Reactions Of Oxiranyl Radical, Heng Wang

Dissertations

Thermochemical properties on fluorinated hydrocarbons, alcohol, hydroperoxides, and alkyl hydroperoxides are determined. Reaction kinetics and modeling on the three member ring cyclic ether radical, oxiranyl radical, are studied under atmospheric and combustion environments.

Molecular geometries, vibration frequencies, internal rotor potentials, and thermo-chemical properties (ΔfHº298, S°(T) and C°p(T)) for fluorinated-hydrocarbons, thermochemical properties and bond energies, for alkyl and fluoro hydroperoxides and fluoro alcohols are determined with comparison of data from a number of different ab initio, density functional theory (DFT) and composite calculation methods, and basis sets.

Kinetic parameters for unimolecular decomposition and isomerization reactions of the oxiranyl radical are determined …

Experimental And Modeling Studies In Membrane Distillation, Lin Li

Dissertations

A variety of microporous hydrophobic flat sheet membranes of polyvinylidene fluoride (PVDF) and expanded-polytetrafluoroethylene (e-PTFE) are studied to evaluate the influence of membrane properties on their performance in desalination by direct contact membrane distillation (DCMD) and vacuum membrane distillation (VMD) processes. The membrane thickness is varied between 23 μm to 125 μm; the pore size is varied from 0.05 μm to 0.45 μm. The porosity is generally high in the range of 0.7 - 0.8. DCMD experiments are performed over a hot brine temperature range of 65 °C to 85 °C and distillate temperature at 25 °C for various brine …

Studies On Purification And Functionalization Of Carbon Nanotubes And Their Aqueous Phase Behavior, Zheqiong Wu

Dissertations

Carbon nanotubes (CNTs) are known to have unique mechanical, thermal and electrical properties which make them attractive for a wide range of applications ranging from batteries to sensors. CNTs are rolled up graphene sheets where the single-walled CNTs (SWCNTs) and multi-walled CNTs (MWCNTs) are classified according to the number of concentric rings. In this dissertation, the focus is on several different aspects of MWCNTs. These include purification, functionalization and colloidal behavior.

MWCNTs are insoluble in solvents and therefore some degree of functionalization is required prior to their real-world applications. Oxidation debris is generated during carboxylation which is usually the first …

A Novel Approach To User Controlled Ambulation Of Lower Extremity Exoskeletons Using Admittance Control Paradigm, Kiran Kartika Karunakaran

Dissertations

The robotic lower extremity exoskeletons address the ambulatory problems confronting individuals with paraplegia. Paraplegia due to spinal cord injury (SCI) can cause motor deficit to the lower extremities leading to inability to walk. Though wheelchairs provide mobility to the user, they do not provide support to all activities of everyday living to individuals with paraplegia.

Current research is addressing the issue of ambulation through the use of wearable exoskeletons that are pre-programmed. There are currently four exoskeletons in the U.S. market: Ekso, Rewalk, REX and Indego. All of the currently available exoskeletons have 2 active Degrees of Freedom (DOF) except …

Custom Engineered Nanomaterials For Energetics And Energy Applications, Ani Abraham

Dissertations

Recent interest in reactive material has shifted to more custom formulations targeting specific applications. In this work, preparation and characterization of nanomaterials used for several energetics and energy applications are addressed.

The main challenge of this effort is to design and prepare nanomaterials which have significant improvements associated with combustion dynamics, reaction rates, sensitivity, biocidal effectiveness, moisture stability, and are environmentally safer over the existing energetics. Nanomaterials that are used to defeat stockpiles of chemical and biological weapons, modify ionosphere properties for transmission of optical and radio signals, and for energy storage are prepared under room or cryogenic temperatures via …

The Role Of Money And Endorsements In Same-Sex Marriage Ballot Initiatives, Jessica Lorraine Loyet Gracey

Dissertations

This research examines how well certain theories of direct democracy explain outcomes of ballot measures on gay marriage bans. Most theories of direct democracy focus on the types of issues that are quite dissimilar from gay marriage bans. Therefore these theories will likely not do a good job of explaining the results of these elections. In particular I examine the role of campaign spending and elite endorsements in campaigns for gay marriage ban ballot initiatives. In candidate elections, voters commonly use heuristics such as party labels and past performance to help them decide. In most ballot initiative contests voters rely …

Applications Of Nanoporous Gold Monoliths As Substrates For The Capture And Release Of Lectins And Glycoproteins, Allan Jonson Alla

Dissertations

Nanoporous gold (np-Au) monoliths are a free-standing nanostructured material with typical pore dimensions in the tens of nanometers range. The microstructure of np-Au resembles those of macroporous monolithic materials being used in chromatographic separations. The surfaces of np-Au monoliths were modified via flow methods with different ligands to develop affinity substrates for separations. A carbohydrate-modified np-Au monolith was prepared by immobilizing thiolated saccharides and further used to separate lectins. The np-Au monolith surface was also functionalized with self-assembled monolayers (SAMs) of α-lipoic acid (LA) followed by activation of carboxyl terminal groups to create amine reactive esters. Concanavalin A (Con A) …

Trends In Mathematics Enrollment And Achievement Gap In St. Louis Area Public High Schools, 2000 - 2014., Victoria V. Shearing

Dissertations

Long before the “No Child Left Behind”, Elementary and Secondary Education Act of 1965, or Brown vs. Board of Education, students of color have dreamed and struggled for equity in education. The issue of equal access to high quality of education highlighted in the NCLB focused public attention on the racial achievement gap. The present study examined mathematics enrollment and achievement trends among St. Louis area public high school students from 2000 to 2014 The study compared the results among racial groups and by gender rather than using a traditional Black-White comparison. Several frameworks contributed to the development of the …

Cacophony: Stories, Michael J. Goodwin

Dissertations

Cacophony: Stories was written over three years in the Center for Writers at the University of Southern Mississippi. The collection depicts middle-class characters disconnected from relationships, careers, and family. Each story explores disillusioned characters forced to confront a major moment in their lives from a bleak setting. Characters find varying degrees of success in forging an identity in the face of flawed existence. This existence lingers, producing an apathetic lifestyle where characters must act. These characters act passively through the narrative and the collection sees them forced to break away from their malaise. The collection aims to explore austere suburban …

A Comparative Study Of Isolation In Headwater Fishes, Bjorn Victor Schmidt

Dissertations

Headwater resident fishes may be prone to a high rate of population fragmentation within river networks because large streams have habitat conditions outside of their preferred ecological niche and may limit gene flow in the dendritic ecological network. To investigate patterns of population structure, asymmetrical gene flow, and influences on genetic distance and isolation from connecting habitat pathways, species specific ecological traits, and basin scale characteristics, a multi-species, multi-regional study was performed. Six headwater species of fish from four taxonomic groupings were sampled for genetic material in three regions of paired neighbor drainages and then genotyped for eight microsatellite loci. …

A Qualitative Study Of Workplace Perceptions By Postpartum Women, Chelsey K. Taylor

Dissertations

Working mothers face the challenge of balancing multiple roles while adhering to or rejecting the societal norms associated with those roles. The unique perceptions of the effects motherhood places on the working mother can shed light on the current and best practices in providing support for working women transitioning into working mothers. The purpose of this study was to identify and evaluate workplace and relationship perceptions of postpartum women employed in higher education. A qualitative, case study approach was developed and framed with three theoretical perspectives: the theory of work adjustment, role theory, and Maslow’s hierarchy of needs. To complete …

“No Cosby Show”: Single Black Mother Homes And How Black Men Build Romantic Relationships, Maia Niguel Moore

Dissertations

This qualitative study explored the lives of 11 Black men to better understand how Black men who were raised in single Black mother homes build romantic relationships with Black women. One focus group and a series of individual in-person interviews were conducted with the participants who ranged between 23 and 43 years of age. Participants were asked questions that inquired about their family of origin, messages they received about relationships, how they define masculinity, their perceptions of Black women, and their previous and current experiences building romantic relationships. Guided by a narrative approach, several different coding methods were used to …

Characterization Of Glycine Rich Proteins From The Salivary Glands Of The Lone Star Tick Amblyomma Americanum, Rebekah Lynn Bullard

Dissertations

Ticks are blood sucking arthropods that feed on living hosts for up to three weeks. The ticks secrete a multitude of pharmacologically active proteins into the host during feeding which allow the tick to avoid the host immune response, establish a blood pool, and form a firm attachment. The firm attachment is facilitated by the formation of a cement cone which surrounds the tick mouthparts and intertwine between the host skin layers. In this study, gene expression of 44 A. americanum genes was measured throughout the bloodmeal to reveal the differential expression of these genes. Each of the genes tested …

Stopover Ecology Of Ruby-Throated Hummingbirds (Archilochus Colubris) During Autumn Migration, Theodore Joseph Zenzal Jr

Dissertations

The Ruby-throated Hummingbird (Archilochus colubris) is one of the smallest Nearctic-Neotropical migrants and the only species of hummingbird that breeds in Eastern North America, yet few studies have investigated the biology of Ruby-throated Hummingbirds when they stopover during migration. Given their small size, high metabolism, aggression, and specialized diet, hummingbirds may represent a migrant that operates on the physiological edge. Therefore it is important to understand the factors that influence their stopover as well as the decision to resume migration. Towards this end, Ruby-throated Hummingbirds were captured during autumn migration along the northern coast of the Gulf of Mexico to …

Screening Strawberry Clones For Anthracnose Disease Resistance Using Traditional Techniques And Molecular Markers, Melinda A. Miller-Butler

Dissertations

Cultivated strawberry, Fragaria x ananassa Duchesne, is host for many pathogens. One of the most destructive diseases of strawberry is anthracnose, whose symptoms include fruit rot, leaf and petiole lesions, crown rot, wilt, and death. Three species of Colletotrichum are considered causative agents of anthracnose diseases of strawberry. Colletotrichum acutatum causes anthracnose fruit rot, has a broad host range, and occurs in most areas of the world where strawberries are grown. Colletotrichum fragariae, the primary causal fungus of anthracnose crown rot, may infect all aboveground parts of the strawberry plant, and has restricted host and geographic ranges. Colletotrichum gloeosporioides …

Teachers' Awareness Of Cultural Diversity And Academic Achievement In Ninth Grade Academies And Senior High Schools, Jamellah Whipps-Johnson

Dissertations

High school graduation rates are higher than they have ever been in 40 years, but disparities continue to exist for students of color and students from poverty when compared to their counterparts. High school reform efforts like creating small learning communities are promising, but small schools alone do not improve student outcomes. Personalization and responsive learning environments are essential to improving academic achievement in high schools, and particularly for ninth graders.

A monocultural teaching force paired with a racially and culturally diverse student population necessitates an examination of teachers’ awareness of cultural diversity particularly in the high school setting where …