High entropy alloys (HEAs), also referred to as complex concentrated alloys (CCAs), are a relatively new class of alloys that have gained significant attention since 2010 due to their unique balance of properties that include high strength, ductility and excellent corrosion resistance. HEAs are usually based on five or more elements alloyed in near equimolar concentrations, and exhibit simple microstructures by the formation of solid solution phases instead of complex compounds. HEAs have great potential in the design of new materials; for instance, for lightweight structural applications and elevated temperature applications. The relation between grain size and yield strength has been a topic of significant interest not only to researchers but also for industrial applications. Though some research papers have been published in this area, consensus among them is lacking, as the studies yielded different results. Al atom being a large atom causes significant lattice distortion. This work attempts to study the Hall-Petch relationship for Al0.3CoFeNi and Al0.3CoCrFeNi and to compare the data of friction stress σ0 and Hall-Petch coefficient K with published data. The base alloys for both these alloys are CoFeNi and CoCrFeNi respectively. It was observed by atom probe tomography (APT) that clustering of Al-Ni atoms in …

West Dallas AR is an interactive location-based app, using the power of multimedia and augmented reality to highlight the stories shared by West Dallas residents.

The design and fabrication of porous ceramic materials with anisotropic properties has, in recent years, gained popularity due to their potential application in various areas that include medical, energy, defense, space, and aerospace. Freeze-casting is an effective, low-cost, and safe method as a wet shaping technique to create these structures. To control the morphology of these materials, many critical factors were found to play an important role. In this dissertation, the processing parameters of the magnetic field-assisted freeze-casting method were optimized with a focus on comparing the structure obtained using vertical and horizontal magnetic fields and understanding the mechanisms that occur under different freezing modes. More specifically, this processing method was used to produce Al2O3 and B4C porous ceramics materials with unidirectionally-aligned pore channels. The effect of the vertical and horizontal magnetic field strength and direction, concentration of magnetic material (Fe3O4), cooling rate, and freezing time were examined. The resulting ceramics with highly aligned pore channels were infiltrated with molten metal to create metal matrix composites. The mechanical properties of these structures were measured and were subsequently correlated to their morphology and composition.

This dissertation consists of three studies that collectively investigate the factors influencing the consumer adoption intention towards emerging healthcare technologies. Essay 1 systematically reviews the extent literature on healthcare technology adoption and serves as the theoretical foundation of the dissertation. It investigates different models that have been previously applied to study healthcare technology acceptance. Meta-analysis method is used to quantitatively synthesize the findings from prior empirical studies. Essay 2 posits, develops, and tests a comprehensive biotechnology acceptance model from the end-user's perspective. Two new constructs, namely, perceived risk and trust in technology, are integrated into the unified theory of acceptance and use of technology. Research hypotheses are tested using survey data and partial least square – structural equation modeling (PLS-SEM). Essay 3 extends the findings from the Essay 2 and further investigates the consumer's trust initiation and its effect on behavioral adoption intention. To achieve this purpose, Essay 3 posits and develops a trust model. Survey data allows testing the model using PLS-SEM. The models developed in this dissertation reflect significant modifications specific to the healthcare context. The findings provide value for academia, practitioners, and policymakers.

This dissertation presents an assortment of research aimed at understanding the composition-dependence of deformation behavior and the response to thermomechanical processing, to enable efficient design and processing of low stacking fault energy (SFE) high entropy alloy (HEAs). The deformation behavior and SFE of four low SFE HEAs were predicted and experimentally verified using electron microscopy and in-situ neutron diffraction. A new approach of employing a minimization function to refine and improve the accuracy of a semi-empirically derived expression relating composition with SFE is demonstrated. Ultimately, by employing the minimization function, the average difference between experimental and predicted SFE was found to be 2.64 mJ m-2. Benchmarking with currently available approaches suggests that integrating minimization functions can substantially improve prediction accuracy and promote efficient HEA design with expansion of databases. Additionally, in-situ neutron diffraction was used to present the first in-situ measurement of the interspacing between stacking faults (SFs) which were correlated with work hardening behavior. Electron transparent specimens (< ~100 nm thick) were used in order to resolve nanoscale planar faults instead of the thicker sub-sized specimens (on the order of millimeters in thickness) which exhibit the classical stages III work hardening behavior characteristic of low SFE metals and alloys. …

We prove the existence and nonexistence of radial solutions of singular semilinear equations Δu + k(x)f(u)=0 with boundary condition on the exterior of the ball with radius R>0 in ℝ^N such that lim r →∞ u(r)=0, where f: ℝ \ {0} →ℝ is an odd and locally Lipschitz continuous nonlinear function such that there exists a β >0 with f <0 on (0, β), f >0 on (β, ∞), and K(r) ~ r^-α for some α >0.

This research seeks to explore how the metal arts are taught to women in Kuwait in an undergraduate setting, making the call for the use of feminist pedagogy when teaching the metal arts to women in Kuwait. This research is achieved using the qualitative methodology of analytic autoethnography. The theoretical framework is a feminist lens bridging the social construction of gender with the gendering of objects and feminist standpoint theory. The data comes from the experiences of creating three of my own pieces of artwork as well as the pieces themselves in tandem with historical, political, and cultural contexts. The analysis from this research is then bridged with feminist pedagogy in order to begin to develop an inclusive metal arts curriculum for women in Kuwait.

Federal and state descriptions of gifted and talented services include identifying and developing leadership talent, but in many states, services are not mandated or funded. Consequently, leadership development is often left to extracurricular programs (e.g., student organizations, athletics). The Junior Reserve Officers' Training Corps (JROTC) provides school-based military-focused leadership education and opportunities to apply emergent leadership skills. This qualitative descriptive study examined leadership talent development in JROTC and the postsecondary paths participants chose. A self-report survey was distributed to graduating seniors enrolled in JROTC in Texas public high schools and semi-structured interviews were conducted with JROTC instructors across the state. The findings highlighted characteristics of students in the sample who chose to pursue military-focused education or careers after high school and themes about the experiences and key considerations related to choosing postsecondary paths. JROTC instructors supported students with differentiated development plans and information about flexible pathways to reach postsecondary goals. Students benefitted from broad definitions of success, exposure to career options, realistic self-assessment, and alignment between intentions and preparation.

This research examines the political implications of community-police relations in the United States by exploring the link between race, perceptions of police performance, and trust in government. Relying on survey data, I examine these relationships for Blacks, Latinos, Asians, and Whites. In addition to examining the broader relationship between community-police relations and institutional trust, this dissertation examines (1) how police perceptions influence individuals' comfort in contacting the police, (2) how police violence and police perceptions influence trust in government, and (3) the effectiveness of community-oriented policing in building community-police relations and increasing trust in government. First, I find that these relationships are conditional on race and ethnicity. Black respondents, who are more likely to experience negative interactions with the police and who are less likely to have positive perceptions of the police, are less comfortable contacting them. Second, while police violence does not have a significant effect on public trust in government, police perceptions and perceptions of discrimination do. Respondents that perceive the police to be performing well and who do not believe their own racial group is being discriminated against, are more likely to express trust in government. Finally, I find that community-oriented policing has the potential to both …

Magnetic nano-clusters in silicon involving iron and cobalt were synthesized using low energy (50 keV) ion implantation technique and post-implantation thermal annealing. Before the irradiation, multiple ion-solid interaction simulations were carried out to estimate optimal ion energy and fluence for each experiment. For high-fluence low-energy irradiation of heavy ions in a relatively lighter substrate, modeling the ion irradiation process using dynamic code SDTrimSP showed better agreement with the experimental results compared to the widely used static simulation code TRIM. A saturation in concentration (~ 48%) profile of the 50 keV Fe or Co implants in Si was seen at a fluence of ~ 2 × 1017 ions/cm2. Further study showed that for structures with a curved surface, particularly for nanowires, better simulation results could be extracted using a code "Iradina" as the curve geometry of the target surface can be directly defined in the input file. The compositional, structural, and magnetic properties were studied using Rutherford backscattering spectrometry, X-ray photoelectron spectroscopy, X-ray diffraction, atom probe tomography, and vibrating sample magnetometry. Irradiation of high-current (~ 2 μA/cm2) 50 keV Fe ions into Si at a fluence of 2 × 1017 ions/cm2 showed the formation of Fe5Si3 nano structures in the near-surface …

In a civil war, conflict management practitioners are concerned with bringing the conflict to an end and providing security for civilians. Similarly, human rights advocacy groups are also concerned with minimizing civilian harm. Given the similar intentions of these actors in civil war states, this dissertation explores under what circumstances conflict management practitioners and human rights advocacy groups collaborate. First, I compare to what extent mediation and peacekeeping cases differ with regards to showing signs of interaction; second, I compare how the level of interaction changes depending on whether peacekeeping missions are deployed by the United Nations or regional intergovernmental organizations. I find that human rights groups are more likely to interact with peacekeeping missions, especially when the missions are deployed by the United Nations. Moreover, I analyze to what extent the interaction between human rights groups and peacekeeping operations impacts how human rights groups carry out their advocacy efforts. The findings reveal that the way human rights groups use their advocacy efforts depend on whether the third parties providing peacekeeping operations respond to their requests.

This research proposes Stress-Lysis, iLog and SaYoPillow to automatically detect and monitor the stress levels of a person. To self manage psychological stress in the framework of smart healthcare, a deep learning based novel system (Stress-Lysis) is proposed in this dissertation. The learning system is trained such that it monitors stress levels in a person through human body temperature, rate of motion and sweat during physical activity. The proposed deep learning system has been trained with a total of 26,000 samples per dataset and demonstrates accuracy as high as 99.7%. The collected data are transmitted and stored in the cloud, which can help in real time monitoring of a person's stress levels, thereby reducing the risk of death and expensive treatments. The proposed system has the ability to produce results with an overall accuracy of 98.3% to 99.7%, is simple to implement and its cost is moderate. Chronic stress, uncontrolled or unmonitored food consumption, and obesity are intricately connected, even involving certain neurological adaptations. In iLog we propose a system which can not only monitor but also create awareness for the user of how much food is too much. iLog provides information on the emotional state of a person along …

Social media plays an important role during multiple phases of a disaster. While it is widely known that citizens turn to social media during disasters to gain information and send help requests, there is a significant gap in our knowledge of how, or if, first responders use social media to conduct disaster response operations. To help address this gap this study employed qualitative, semi-structured interviews with a sample of first responders (N = 20) who were deployed to Hurricane Harvey in 2017. The interviews sought to gain a better understanding of how social media was used to conduct response operations and identify both limitations and advantages of social media as perceived by first responders. Through a systematic coding process the analysis identified four themes related to social media usage among first responders to disasters: (1) more than just Twitter; (2) rumor has it; (3) one size does not fit all; and (4) timing is everything. The findings of this research highlight the importance of social media for both organizations and individuals involved in responding to disasters.

Prompt and efficient intervention is vital in reducing casualty figures during epidemic outbreaks, disasters, sudden civil strife or terrorism attacks. This can only be achieved if there is a fit-for-purpose and location-specific emergency response plan in place, incorporating geographical, time and vehicular capacity constraints. In this research, a comprehensive emergency response model for situations of uncertainties (in locations' demand and available resources), typically obtainable in low-resource countries, is designed. It involves the development of algorithms for optimizing pre-and post-disaster activities. The studies result in the development of four models: (1) an adaptation of a machine learning clustering algorithm, for pre-positioning depots and emergency operation centers, which optimizes the placement of these depots, such that the largest geographical location is covered, and the maximum number of individuals reached, with minimal facility cost; (2) an optimization algorithm for routing relief distribution, using heterogenous fleets of vehicle, with considerations for uncertainties in humanitarian supplies; (3) a genetic algorithm-based route improvement model; and (4) a model for integrating possible new locations into the routing network, in real-time, using emergency severity ranking, with a high priority on the most-vulnerable population. The clustering approach to solving dept location-allocation problem produces a better time complexity, and the …

Purity culture was a movement created by evangelical Christian organizations in the United States and backed by marketing campaigns, media, churches, and sex education beginning in the 1990s. This movement was founded on the idea that young men and women should remain abstinent before marriage, thereby remaining in a state of "purity" for their future spouse. In purity culture messaging, women were positioned as sexual gatekeepers while men were framed as having little or no control over their sexual impulses, causing most of the purity expectation to fall on women. While the concept of remaining "pure" is not new, purity culture taught a new generation of women to feel ashamed and fearful of their sexuality and existed alongside an increasingly sexualized media landscape. This study analyzes purity culture and anti-purity culture themes that exist within television shows as well as how women perceive purity culture messaging and the effects this messaging had on their lives.

Exclusionary discipline is a consequence of behavior for students who break the student code of conduct. Extensive research about the effects that exclusionary discipline can have on secondary students, as evidenced by reduced graduation rates, has been conducted; but, research studies investigating the potential impact that exclusionary discipline can have on the academic outcomes of students at the elementary level have yet to be conducted. The use of exclusionary discipline is overrepresented in students with low socio-economic (SES) backgrounds; large populations of low-SES students are educated at Title I schools that receive federal funding to support academic growth. The purpose of this causal-comparative, non-experimental study was to investigate the impact that exclusionary discipline consequences had on fifth-grade students who attended all of the elementary schools within one north Texas school district during the 2018-2019 school year. In conjunction with the examination of the effect that the assignment of exclusionary discipline consequences can have on the academic outcomes of fifth-grade students, student-specific variables such as attendance at a Title I or non-Title I campus, student race, timing of exclusionary discipline assignment, and students in various educational programs were investigated to determine the potential impact of exclusionary discipline on fifth-grade students by …

In the current globalizing society, teachers are provided opportunities to move across their national borders to seek learning, professional development, and working opportunities. Technology-related professional development is particularly valued for teachers' sojourn to the technology intensive cultures. This qualitative cross-case study explored the K-12 Chinese language teachers' changes of teachers' application and perspective toward educational technology in cross-cultural teaching context through the lens of transformative learning theory. The qualitative data is collected from the interviews with 20 teacher participants in the four stages of cross-cultural sojourning: pre-departure, currently sojourning, post-sojourn, and immigrated. A qualitative cross-case analysis is conducted to compare the characteristics of teachers in different cases, and developed the complete process of the cross-cultural technology adoption and perspective. Factors contributed to the changes are also identified. Five issues related to the process are discussed. Implications and future directions were also included.

Health disparities are a recognized public health concern and the need to address these disparities remains worthy of bringing new methods that assist in closing the gap. This research examined the effectiveness of data science to highlight health disparities, and to convey the value of data science applications in related health care applications. The goal of this research was accomplished by undertaking a multi-phased and multi-method approach, best represented in three individual essays. In essay one, a systematic literature review assessed the state in current academic literature of data science applications used to explore health disparities and to determine its applicability. The systematic review was guided by the Preferred Reporting Items for Systematic Review and Meta-Analyses (PRISMA) guidelines. Essay two assessed the capacity of data science software to address the effectiveness of these data science technologies in examining health disparities data. This was conducted using KDnuggets data pertaining to analytics, data science, and machine-learning software. The research in this essay demonstrated the potential utility of leading software to perform the kinds of data science operations that can achieve improved care in healthcare networks by addressing health disparities. Essay three provided an appropriate case study to showcase the value data science …

Multicultural (MC) counseling and social justice (SJ) are foundational parts of counselors' professional identity, and they are fostered through a developmental process that counselor educators facilitate. The purpose of this study was to explore the relationship between counselor educators' ethnic/racial identity development (ERI), their social justice orientation (SJO) and their multicultural teaching competence (MCTC). MCTC was examined using the constructs of knowledge and sensitivity. Data was collected from a nationally distributed online survey. Data were analyzed using four hierarchical regression models in order to control for socially desirable responding. Results indicated that ERI was a significant predictor of MCTC-Knowledge (p < .001) and that SJO was a significant predictor of MCTC-Sensitivity (p < .001). Socially desirable responding was not significantly related to MCTC. Results suggest the importance of attending to ERI and SJO as separate processes in training future counselor educators.

The Godzilla media franchise is one of the longest running media franchises, which means the character himself has gone through many changes throughout the years. However, in American pop culture, the characters of Godzilla is perceived as a hero, a friend of humanity and defender of Earth. This reputation comes from the Showa Era, where Godzilla often fought on the side of humanity, rather than trying to destroy them as depicted in the original Gojira. In recent years, Toho, Godzilla's corporate owners, have been steering the King of the Monsters back into the villain role. Despite this tone shift by Godzilla's owners, American Godzilla paratexts still generally depict Godzilla as a hero. These depictions of Godzilla are used to maintain his status as a family friendly heritage brand and keep a door open for parents to introduce their children to the brand. Such a strategy allows Godzilla to survive into the modern day as an international powerhouse franchise.

Teachers face pressures to meet the needs of an ever-changing diverse population of learners while simultaneously attempting to assist students in meeting state standards. There is a body of research that supports emergent bilinguals' growth in reading and writing. However, those practices do not necessarily reflect classroom instruction nor the needs of the students. The purpose of this study was to examine adolescent emergent bilinguals' perceptions about their learning from research-based literacy practices implemented in a classroom designed as a third space. Data were collected using participatory research and photo-elicitation and were analyzed using inductive analysis. The emergent bilinguals provided their insights about class assignments. Findings revealed that research-based literacy practices support emergent bilinguals' perceptions of learning when they are made accessible to them in distinctive yet extensive ways. For students to uncover which literacy activities they value, teachers need to present them with various opportunities to explore their own learning and encourage them to take ownership of their learning. Educators must consider the unique and individual needs of emergent bilinguals when designing the classroom environment and the lessons based on the standards. Recommendations for practitioners, professional development coordinators, and researchers are presented.

This study investigates the effects of sketchnoting, a visualized approach of notetaking, on learning strategies. The main questions asked were: What are the effects of sketchnoting on learners' learning strategies, including cognitive strategies (rehearsal, elaboration, organizational) and metacognitive strategies? Forty-eight undergraduate participants were divided into two groups, an experimental group, and a control group. Findings demonstrated a significant increase in cognitive learning strategies and metacognitive strategies in the experimental group. Other findings revealed that the aesthetic appeal of sketchnoting is the major reason motivating participants' sketchnoting behavior and the corresponding connection between design strategies and the learning strategies is the key of positive impacts of sketchnoting on learning strategies. Additional insights and implications are discussed.

The Risorgimento or "resurrection" of Italy united a collection of independent Italian kingdoms, duchies, and principalities under the auspices of the Piedmontese House of Savoy. No longer was Italy a mere expression géographique, as Austrian Chancellor Klemens von Metternich snidely remarked in 1847, but a united nation state. Studies of the Risorgimento successfully highlight the role of famous Piedmontese and Italian nationalists in demonstrating the success of the movement. However, the smaller states of the peninsula have largely disappeared from these histories. Among these overlooked states is the Grand Duchy of Tuscany and Tuscany's last grand duke, Leopold II of Habsburg-Lorraine. Both are consistently omitted from broader surveys of the peninsula. In rare situations when Leopold II enters the historical narrative he is dismissed as a reactionary, although he maintained a reputation as an enlightened and relatively liberal ruler for the majority of his rule. Especially in anglophone literature, little to no discussion of his thirty-five-year reign is available. This omission creates an unfortunate lacuna in the historiography of the Risorgimento. It is in studies of these smaller Italian states that the intricacies of statecraft, nationalism, and localism are most visible. To understand the extent of the Risorgimento's success, it …

The Age of Trump witnessed the visible rise of intense culture wars and polarization in the United States. While culture wars are not new phenomena, the current iteration has digital media acting as new discursive structures and mediating battlegrounds for all sides of the cultural conflict. This project chronicles these online culture wars, demonstrating how within a neoliberal and postmodern socio-cultural condition, the rise of ambivalent, profit-driven digital technologies and platforms structure affect and mediate newly networked neo-reactionary populist (sub)cultural ideologies and discourses. The resulting online ecosystems afforded the digital formations of obscure reactionary subcultures (trolls, antifeminists, the alt-right, etc.) with particular personalized and affectively driven memetic communicative logics. These reactionary affective publics eventually began converging under perceived common ideological and social interests as online actions and reactionary discursive (re)formations and (re)networkings were catalyzed by (sub/cross)cultural conflicts and moments of sentimental activation. This led to the emergence of affectively charged and informally networked reactionary publics which began spilling out into the offline world alongside Trump's ascendancy to the White House. The increasing progressive reactions during the Trump Era also faced limitations in combatting reactionary politics due to structural dynamics of digital media and the larger culture war filtering of politics. …