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FERMI SURFACE STUDIES OF THE DIRAC TYPE-II SEMIMETAL CANDIDATES (Ni, Zr)Te2 USING HIGH FIELD TORQUE MAGNETOMETRY
No full textWe have studied the Fermi surface characteristics of two Dirac type-II semimetal candidates (Ni, Zr)Te2 using the torque magnetometry technique under the magnetic field up to 35 T and temperature as low as 0.32 K. The torque signal shows clear de Haas-van Alphen (dHvA) oscillations above 20 T for both ZrTe2 and NiTe2 samples. Frequency analysis reveals one major frequency for ZrTe2 at 530 T; whereas there are three distinct frequencies Fα ∼ 72 T, Fβ ∼ 425 T, and Fγ ∼ 630 T for NiTe2. From the analyses of temperature-dependent dHvA oscillations data using the Lifshitz-
Kosevich (LK) formula, we observed the effective masses charge carriers to be m*= 0.26me and m* = 0.13me for ZrTe2 and NiTe2, respectively, where me is the free electron mass. The Berry phase (Φ) is calculated to identify the topological nature of ZrTe2 and NiTe2 by constructing the Landau level fan diagram. It is found that Φ ∼ 0 and π for ZrTe2 and NiTe2, respectively. These results strongly suggest that ZrTe2 is a topologically trivial system, whereas NiTe2 is a topologically non-trivial system. These materials’ electronic band structure and Fermi surface were calculated using the density functional theory (DFT). Our DFT results show that the Dirac point is closer to the Fermi level in NiTe2 as compared to that for ZrTe2. Therefore, our torque results could only detect the signal from Dirac quasi-particles for NiTe2, not
for ZrTe2
Accomplishments under the Chancellor's Research Initiative in Water Resources at WTAMU
No full textThe data collection methodology involved numerous research projects, laboratory and field, with numerous student and faculty collaborators.On May 23, 2019, the Texas A&M System announced a Chancellor's Research Initiative (CRI) between WTAMU and Texas A&M AgriLife. The initiative provided for the hiring of two new WTAMU faculty members: Dr. Bednarz in Agricultural Sciences (hired Spring, 2020) who has a 50% joint appointment with AgriLife Research, and Dr. Parker in Engineering (hired Fall, 2021) who has a 50% joint appointment with AgriLife Extension. The CRI provided $1 million in startup funding to purchase laboratory and field equipment and support undergraduate and graduate students. As outlined in this poster presentation, the CRI funds have been used to leverage numerous collaborative research projects among WT, AgriLife, and USDA researchers in addition to county extension agents, farmers/producers, and faculty at other universities
“METAMORPHOSED INTO MEN”: WOMEN BOYCOTTERS OF THE AMERICAN REVOLUTION
Get PDFThe historiography of the American Revolution is lacking tremendously in regard to the participation of its patriotic women. Their contributions to the non-importation agreements of the 1760s and 1770s have been thoroughly examined by historians Linda Kerber, Mary Beth Norton, and Rosemarie Zagarri. However, the relationship between their participation in non-importation and the alteration of identity regimes in America has yet to be dissected. As other scholars have noted, the Revolution erupted in an Atlantic World wracked by intense epistemological confusion which had begun to impact the way Americans understood personal identity formation. An older identity regime, predicated on a socially turned-self, was giving way to a system of identity which viewed the self as intrinsic and autonomous. Their respective studies, however, fail to adequately explain why the Revolution brought forth this change. This thesis uses these inquiries to explore how women’s participation in non-importation during the Revolution played a catalytic role in this transition of the American identity regimes. This study emphasizes the constitutive nature of language; that is, it provides a discursive analysis of newspapers, broadsides, diaries, sermons, pamphlets, and letters to argue that women’s participation in the American Revolution assisted in bringing about the ascendency of the modern regime of identity as an effort to stabilize the early republic’s nascent gendered order
Small Scale Wind Turbine For Back Up Power Generation
Get PDFData for this was obtained through simulations/programs.A small-scale wind generator system can be designed as a backup power generator. This type of system can provide temporary power when access to either the power grid or combustible fuel sources for traditional generators are not available. Adapting to this type of "off-the-grid" power generation as natural disasters are having a greater and more frequent impact on infrastructure could be ideal to many communities. In this research project, a wind generator system that can provide sufficient power to operate a household refrigerator and charge mobile devices has been modeled. This provides safe refrigeration for food or medicine and also to communicate in an emergency situation. The system is modeled using two 12 V deep cycle batteries both rated at 75-watt hours of capacity. Wire sizing and current requirements are derived from the MPPT controller design and maximum wattage output of the generator and the battery voltage. The system is designed to meet the criteria such as the system should not be permanently affixed to a structure and power generation should be sufficient to power a household refrigerator and charge mobile devices as needed
Integrated Science Teaching in Atmospheric Ice Nucleation Research: Immersion Freezing Experiments
Get PDFThe presented curricular training was developed to educate bulk water sample characterization techniques (pH, conductivity, and surface tension), an immersion freezing assay, and chemical composition analysis.This poster introduces hands-on curricular modules integrated with research in atmospheric ice nucleation, which is an important phenomenon potentially influencing global climate change. The primary goal of this work is to promote meaningful laboratory exercises to enhance the competence of students in the fields of science, technology, engineering, and math (STEM) by applying an appropriate methodology to laboratory ice nucleation measurements. To achieve this goal, three laboratory modules were developed with 18 STEM interns and tested by 28 students in a classroom setting. Students were trained to experimentally simulate atmospheric ice nucleation and cloud droplet freezing. For practical training, this work utilized a simple freezing assay device called the West Texas Cryogenic Refrigerator Applied to Freezing Test (WT-CRAFT) system. More specifically, students were provided with hands-on lessons to calibrate WT-CRAFT with deionized water and apply analytical techniques to understand the physicochemical properties of bulk water and droplet freezing. All procedures to implement the developed modules were typewritten during this process, and shareable read-ahead exploration materials were developed and compiled as a curricular product. Additionally, students conducted complementary analyses to identify possible catalysts of heterogeneous freezing in the water. The water analyses included: pH, conductivity, surface tension, and electron microscopy - energy-dispersive X-ray spectroscopy. During the data and image analysis process, students learned how to analyze droplet freezing spectra as a function of temperature, screen and interpret the data, perform uncertainty analyses, and estimate ice nucleation efficiency using computer programs. Based on the formal program assessment of learning outcomes and direct (yet de-identified) student feedback, we broadly achieved our goals to 1) improve their problem-solving skills by combining multidisciplinary science and math skills and 2) disseminate data and results with variability and uncertainty. The developed modules can be applied at any institute to advance undergraduate and graduate curricula in environmental science
Black Borderlands: Understanding the Pull of El Paso, 1900-1940
Get PDFMost research into the U.S.-Mexico Borderlands region deals primarily with the Mexican, Anglo-European, and Native American populations that have interacted and adapted to life in a region between nations. The scholarship surrounding Texas history largely follows the state’s role during the Civil War, Texas Independence, military leaders, political change over time, and race relations between the Anglo population and the larger Mexican and Mexican-American populations. Not much has been done regarding African-American history or their migration in both the borderlands region and the western part of Texas from 1900 to 1940. This is especially true in El Paso, whose large Mexican-American population serves as the basis for most scholarship on the city. El Paso serves as a historical anomaly at a time in United States history when racial tensions were at an impressive high. El Paso managed to exist as a hub of some semblance of racial unity and a city of opportunity for African Americans. To understand why El Paso is such an outlier in the history of African American migration and life within United States borders, historians need to understand what enticed African Americans to settle on Texas’s borders in spite of numerous factors that otherwise dissuaded settlers. This study argues that despite larger state-wide tensions, El Paso was as a major pull factor that resulted in the settlement of thousands of African Americans at a time where the deep South saw a mass exodus of non-white peoples
Llanero Unit
No full textThe Llanero Unit focuses on the Spanish New Mexico settlers that resided or frequently traveled to the Texas Panhandle. Focused specifically is the historical significance and impact that ciboleros, Comancheros, and pastores had on the region.
This resource includes materials for a week's worth of class periods.
Created for U.S. History After 1877
Texas Essential Knowledge and Skills (TEKS)
analyze economic issues such as industrialization, the growth of railroads, the growth of labor unions, farm issues, the cattle industry boom, the growth of entrepreneurship, and the pros and cons of big business; analyze social issues affecting women, minorities, children, immigrants, and urbanizationThe Llanero Unit focuses on the Spanish New Mexico settlers that resided or frequently traveled to the Texas Panhandle. Focused specifically is the historical significance and impact that ciboleros, Comancheros, and pastores had on the region
Clinical Experience of Family Nurse Practitioner Students during the COVID-19 Pandemic
Get PDFThe data collection methodology was qualitative research design involving interviews.The aim of this study was to ascertain the experiences of Family Nurse Practitioner (FNP) students participating in clinical experience during the COVID-19 pandemic and to identify the clinical challenges faced by FNP students during the COVID-19 pandemic. Background: Literature reveals the current COVID-19 pandemic poses urgent and prolonged threats to the health and well-being of the population worldwide. FNP students have struggled to find clinical sites and preceptors during the pandemic. Design: A qualitative research design involving interviews asking open-ended questions to converse with students was conducted. Interviews were conducted during the fall 2021 semester. Method: All interviews were transcribed and analyzed. Each transcript was read multiple times and themes were developed. Three main themes emerged. Conclusion: Clinical experience is an intricate part of the program as confidence to treat and educate patients is paramount. The themes identified during student interviews included: 1) Anxiety and stress; 2) Hindrance of knowledge base; and 3) Personal growth. Recommendation: Utilization of telehealth during education and clinical experiences will assist the FNP student maintain success throughout the program
A Survey Assessing Interpersonal, Academic, and Employability Skills Associated with Participation on an Agriculturally-Based Competitive Team
No full textWhile several studies have assessed the skills produced by competing on agriculture-related judging teams, there are limited published reports assessing these same skills by students on other agriculture competitive teams (Rodeo, Equestrian, Ranch horse). The current study surveyed students across the United States using a 5-point Likert-Type scale to assess interpersonal, academic, and employability skills after participation on collegiate judging (Horse, Meat, Livestock), performance-type (Equestrian, Rodeo, Ranch/Stock), or both teams. The survey was sent to coaches of active teams at 4-yr universities and completed by students (n = 238) at the end of their team’s respective seasons. This study assessed 17 interpersonal, 14 academic, and 19 employability skills, which were previously identified by competitive team alumni in a Delphi Study. Participants were asked to self-assess interpersonal skills pre and post participation, and the means were compared using a paired t-test. Post-participation data from self-assessment of interpersonal, academic and employability skills by members of judging, performance-type, or both teams was analyzed using a one-way ANOVA. Significance was declared at P= 0.05. There was enhancement of interpersonal skills (P = 0.024), academic skills (P= <0.001) and employability skills (P= <0.001) between teams. A Chi-Square was performed for each skill or factor crossed with the type of team on which a student chose to participate. In the interpersonal category (P< 0.045) content knowledge, decision making, memory, networking, and public speaking were all deemed significant. In the academic category (P< 0.045), content knowledge, efficiency, motivation, structure, and test taking ability were deemed significant. Finally, in the employability category, communication skills, confidence, decision making, experience, learned skills/knowledge, multi-tasking, personal drive, and problem solving were all deemed significant (P< 0.043). Students who engaged in agriculturally-based competitive teams enhanced their skills regardless of their chosen team. However, some interpersonal, academic, and employability skills were significantly different between judging and performance competitors
Why do I want to work for you? An Analysis of Job Satisfaction, Laborer Retention, and Recruitment in the Cattle Feeding Industry
No full textThe Texas Cattle Feeders Association (TCFA) region is the most productive beef cattle region in the United States (TCFA, 2023). Productivity and efficiency are two areas that work hand in hand and employees drive both. To identify areas of growth for the beef cattle industry, assessing concerns of those who hold the future of the industry in their hands, the laborers, is crucial. Along with the challenge of a tightened labor force, the concentration of feedyards in this region poses a unique competition between yards to hire and retain valuable employees. A thorough understanding of laborers' perceptions is imperative to the industry and its' leaders. The primary objective of this study was to identify key themes of feedyard laborers' viewpoints regarding their overall job satisfaction and perceived obstacles of retention and recruitment. Secondary objectives were to observe theme frequencies across feedyard departments and determine if differences in laborers’ perspectives differed between feedyard capacity groups. This study builds upon previous research (Robinson, 2019), which provided benchmark data to gain an understanding of demographics, employee satisfaction, and employee attitudes and opinions. The survey instrument was designed and mailed in January 2019 to 685 laborers employed at 101 feedyards in the TCFA region (Robinson, 2019). Open-ended responses provided personal and accurate portrayals of the respondents' attitudes and opinions. Nine open-ended question written narratives from 146 laborers were analyzed in this study, which employed a phenomenological qualitative approach and coded responses. Coding included identifying patterns of terminology or phrases and allocating a code to the individual responses. Codes were grouped into themes and organized in a codebook to bring summarization. Results revealed the most common themes to be Compensation, Work-Life Balance, Psychological Income, and Work Conditions. Frequencies of themes were examined across feedyard departments, and differences in laborer perceptions between feedyard capacity groups were analyzed using chi square tests. Results indicated that themes of laborer perspectives differed between feedyard capacity groups