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Description
Do fact-checks influence individuals' attitudes and evaluations of political candidates and campaign messages? This dissertation examines the influence of fact-checks on citizens' evaluations of political candidates. Using an original content analysis, I determine who conducts fact-checks of candidates for political office, who is being fact-checked, and how fact-checkers rate political candidates' level of truthfulness. Additionally, I employ three experiments to evaluate the impact of fact-checks source and message cues on voters' evaluations of candidates for political office.
ContributorsWintersieck, Amanda (Author) / Fridkin, Kim L (Thesis advisor) / Kenney, Patrick (Committee member) / Ramirez, Mark (Committee member) / Arizona State University (Publisher)
Created2015
Description
Understanding sources of knowledge (e.g., seeing leads to knowing) is an important ability in young children’s theory of mind development. The research presented here measured if children were better at reporting their own versus another person’s knowledge states, which would indicate the presence of introspection. Children had to report when the person (self or other) had knowledge or ignorance after looking into one box and not looking into another box. In Study 1 (N = 66), 3- and 4-year-olds found the other-version of the task harder than the self-version whereas 5-year-olds performed near ceiling on both versions. This effect replicated in Study 2 (N = 43), which included familiarization trials to make sure children understood the question format. This finding is in support of the presence of introspection in preschool-aged children. In the same studies, children also showed evidence for theorizing about their own and others knowledge states in a guessing task (Study 1) and in true and false belief tasks (Study 2). These findings together indicate both introspection and theorizing are present during young children's theory of mind development.
ContributorsGonzales, Christopher (Author) / Fabricius, William (Thesis advisor) / Spinrad, Tracy (Committee member) / Kobes, Bernard (Committee member) / Arizona State University (Publisher)
Created2015
Description
From Frankenstein to District 9: Ecocritical Readings of Classic and Contemporary Fiction and Film demonstrates how American studies methodologies, ecological literary criticism, and environmental justice theory provide both time-tested and new analytical tools for reading texts from transnational perspectives. Recently, American literary scholars have been responding to calls for collective interdisciplinary response to widening social disparities and species collapses caused by climate change in the new epoch recently being termed "the anthropocene." In response, I analyze canonical texts, such as Mary Shelley's Frankenstein and Aldous Huxley's Brave New World in juxtaposition with Neill Blomkamp's South African science fiction thriller District 9 and contemporary US American novels such as Toni Morrison's Sula, William Faulkner's "The Bear" in Go Down, Moses and Richard Power's Generosity and The Echo Maker, to show how writers, filmmakers, and academics have been calling attention to dramatic climate events that consequently challenge the public to rethink the relationships among human beings to other species, and to ecological systems of low predictability, high variability, and frequent extremes. Rather than focusing solely on the "human," I examine how the relationships and livelihoods of multi-species communities shape and are shaped by political, economic, and cultural forces. As a whole, this dissertation seeks to make abstract, often intangible global patterns and concepts accessible by providing models for what I call "readings in the anthropocene" or re-readings of classic and contemporary texts and film that offer insights into changing human behavior and suggesting alternative management practices of local and global commons as well as opportunities to imagine how to live in and beyond the anthropocene.
ContributorsTurner, Kyndra (Author) / Adamson, Joni (Thesis advisor) / Lussier, Mark (Committee member) / Sadowski-Smith, Claudia (Committee member) / Arizona State University (Publisher)
Created2015
Description
Department chairs or school directors, as the bridge between administration and faculty, and closely associated with the teaching and learning at the heart of the institution, hold very important roles in the departments or schools they oversee. Many chairs and department administrators in music schools and departments are selected from the faculty of the department and asked to serve as the chief administrator. They assume a set of duties that, to that point, have been beyond the purview of their academic training and professional experience--particularly for those with training in the performance disciplines. While usually successful as teachers, these new chairs and department heads face a difficult transition into administrative work because the skills required for an effective administrator are very different from those necessary to be an effective teacher.
The purpose of this research was to ascertain the knowledge and skills that would be most practical for individuals aspiring to administrative or leadership roles in schools or departments of music, and to design a doctoral cognate that would supply that knowledge. The author reviewed the available research into administrative training for individuals pursuing administrative work in schools and departments of music. Interviews were then conducted with current or former music administrators from across the United States, inquiring about their experiences as administrators, any administrative training they received, and the types of things they wished they had known when first working in an administrative capacity. The author used this information to make recommendations concerning the creation of a doctoral cognate in administration for graduate students preparing to become music faculty so that they are equipped to undertake administrative responsibilities.
The resulting cognate area consists of four courses: a course in finance, budgeting, and development; a course on organizational structure and behavior; a course on management and leadership theory; and a practicum or independent study in administration, in which students spend time observing and shadowing their department administrator(s) to apply the principles learned in the previous three courses.
The purpose of this research was to ascertain the knowledge and skills that would be most practical for individuals aspiring to administrative or leadership roles in schools or departments of music, and to design a doctoral cognate that would supply that knowledge. The author reviewed the available research into administrative training for individuals pursuing administrative work in schools and departments of music. Interviews were then conducted with current or former music administrators from across the United States, inquiring about their experiences as administrators, any administrative training they received, and the types of things they wished they had known when first working in an administrative capacity. The author used this information to make recommendations concerning the creation of a doctoral cognate in administration for graduate students preparing to become music faculty so that they are equipped to undertake administrative responsibilities.
The resulting cognate area consists of four courses: a course in finance, budgeting, and development; a course on organizational structure and behavior; a course on management and leadership theory; and a practicum or independent study in administration, in which students spend time observing and shadowing their department administrator(s) to apply the principles learned in the previous three courses.
ContributorsMcIvor, Emily (Author) / Spring, Robert (Thesis advisor) / Gardner, Joshua (Thesis advisor) / Bailey, Wayne (Committee member) / Schuring, Martin (Committee member) / Solis, Theodore (Committee member) / Arizona State University (Publisher)
Created2015
Description
Spider dragline silk is an outstanding biopolymer with a strength that exceeds steel by weight and a toughness greater than high-performance fibers like Kevlar. For this reason, structural and dynamic studies on the spider silk are of great importance for developing future biomaterials. The spider dragline silk comprises two silk proteins, Major ampullate Spidroin 1 and 2 (MaSp1 and 2), which are synthesized and stored in the major ampullate (MA) gland of spiders. The initial state of the silk proteins within Black Widow MA glands was probed with solution-state NMR spectroscopy. The conformation dependent chemical shifts information indicates that the silk proteins are unstructured and in random coil conformation. 15N relaxation parameters, T1, T2 and 15N-{1H} steady-state NOE were measured to probe the backbone dynamics for MA silk proteins. These measurements indicate fast sub-nanosecond timescale backbone dynamics for the repetitive core of spider MA proteins indicating that the silk proteins are unfolded, highly flexible random coils in the MA gland. The translational diffusion coefficients of the spider silk proteins within the MA gland were measured using 1H diffusion NMR at 1H sites from different amino acids. A phenomenon was observed where the measured diffusion coefficients decrease with an increase in the diffusion delay used. The mean displacement along the external magnetic field was found to be 0.35 μm and independent of the diffusion delay. The results indicate that the diffusion of silk protein was restricted due to intermolecular cross-linking with only segmental diffusion observable.
To understand how a spider converts the unfolded protein spinning dope into a highly structured and oriented in the super fiber,the effect of acidification on spider silk assembly was investigated on native spidroins from the major ampullate (MA) gland fluid excised from Latrodectus hesperus (Black Widow) spiders. The in vitro spider silk assembly kinetics were monitored as a function of pH with a 13C solid-state Magic Angle Spinning (MAS) NMR approach. The results confirm the importance of acidic pH in the spider silk self-assembly process with observation of a sigmoidal nucleation-elongation kinetic profile. The rates of nucleation and elongation and the percentage of β-sheet structure in the grown fibers depend on pH.
The secondary structure of the major ampullate silk from Peucetia viridians (Green Lynx) spiders was characterized by X-ray diffraction (XRD) and solid-state NMR spectroscopy. From XRD measurement, β-sheet nano-crystallites were observed that are highly oriented along the fiber axis with an orientational order of 0.980. Compare to the crystalline region, the amorphous region was found to be partially oriented with an orientational order of 0.887. Further, two dimensional 13C-13C through-space and through-bond solid-state NMR experiments provide structural analysis for the repetitive amino acid motifs in the silk proteins. The nano-crystallites are mainly alanine-rich β-sheet structures. The total percentage of crystalline region is determined to be 40.0±1.2 %. 18±1 % of alanine, 60±2 % glycine and 54±2 % serine are determined to be incorporated into helical conformations while 82±1 % of alanine, 40±3 % glycine and 46±2 % serine are in the β-sheet conformation.
To understand how a spider converts the unfolded protein spinning dope into a highly structured and oriented in the super fiber,the effect of acidification on spider silk assembly was investigated on native spidroins from the major ampullate (MA) gland fluid excised from Latrodectus hesperus (Black Widow) spiders. The in vitro spider silk assembly kinetics were monitored as a function of pH with a 13C solid-state Magic Angle Spinning (MAS) NMR approach. The results confirm the importance of acidic pH in the spider silk self-assembly process with observation of a sigmoidal nucleation-elongation kinetic profile. The rates of nucleation and elongation and the percentage of β-sheet structure in the grown fibers depend on pH.
The secondary structure of the major ampullate silk from Peucetia viridians (Green Lynx) spiders was characterized by X-ray diffraction (XRD) and solid-state NMR spectroscopy. From XRD measurement, β-sheet nano-crystallites were observed that are highly oriented along the fiber axis with an orientational order of 0.980. Compare to the crystalline region, the amorphous region was found to be partially oriented with an orientational order of 0.887. Further, two dimensional 13C-13C through-space and through-bond solid-state NMR experiments provide structural analysis for the repetitive amino acid motifs in the silk proteins. The nano-crystallites are mainly alanine-rich β-sheet structures. The total percentage of crystalline region is determined to be 40.0±1.2 %. 18±1 % of alanine, 60±2 % glycine and 54±2 % serine are determined to be incorporated into helical conformations while 82±1 % of alanine, 40±3 % glycine and 46±2 % serine are in the β-sheet conformation.
ContributorsXu, Dian (Author) / Yarger, Jeffery L (Thesis advisor) / Holland, Gregory P (Thesis advisor) / Wang, Xu (Committee member) / Liu, Yan (Committee member) / Arizona State University (Publisher)
Created2015
Description
Attack of the Fake Geek Girls: Challenging Gendered Harassment and Marginalization in Online Spaces applies feminist, gender, and rhetorical theories and methods, along with critical discourse analysis, to case studies of the popular online social media platforms of Jezebel, Pinterest, and Facebook. This project makes visible the structural inequities that underpin the design and development of internet technologies, as well as commonplace assumptions about who is an online user, who is an active maker of internet technologies, and who is a passive consumer of internet technologies. Applying these critical lenses to these inequities and assumptions enables a re-seeing of commonplace understandings of the relationship between gender performativity and digital cultures and practices. Together, these lenses provide a useful set of tools for methodically resisting the mystique of technologies that are, simultaneously, represented as so highly technical as to be opaque to scrutiny, and as ubiquitous to everyday life as to be beneath critical examination.
Through a close reading of the discourses surrounding these popular social media platforms and a rhetorical analysis of their technological affordances, I documented the transference of gender-biased assumptions about women's roles, interests, and competencies, which have historically been found in face-to-face contexts, to these digital spaces. For example, cultural assumptions about the frivolity of women's interests, endeavors, issues, and labors make their way into digital discourse that situates the online practices of women as those of passive consumers who use the internet only to shop and socialize, rather than to go about the serious, masculine business of making original digital content.
This project expands on existing digital identity and performativity research, while applying a sorely needed feminist critique to online discourses and discursive practices that assume maleness and masculinity as the default positionality. These methods are one approach to addressing the pressing problems of online harassment, the gender gap in the technology sector, and the gender gap in digital literacies that have pedagogical, political, and structural implications for the classroom, workplace, economic markets, and civic sphere.
Through a close reading of the discourses surrounding these popular social media platforms and a rhetorical analysis of their technological affordances, I documented the transference of gender-biased assumptions about women's roles, interests, and competencies, which have historically been found in face-to-face contexts, to these digital spaces. For example, cultural assumptions about the frivolity of women's interests, endeavors, issues, and labors make their way into digital discourse that situates the online practices of women as those of passive consumers who use the internet only to shop and socialize, rather than to go about the serious, masculine business of making original digital content.
This project expands on existing digital identity and performativity research, while applying a sorely needed feminist critique to online discourses and discursive practices that assume maleness and masculinity as the default positionality. These methods are one approach to addressing the pressing problems of online harassment, the gender gap in the technology sector, and the gender gap in digital literacies that have pedagogical, political, and structural implications for the classroom, workplace, economic markets, and civic sphere.
ContributorsTekobbe, Cindy (Author) / Miller, Keith D. (Thesis advisor) / Rose, Shirley K. (Committee member) / Boyd, Patricia (Committee member) / Arizona State University (Publisher)
Created2015
Description
CubeSats are a newly emerging, low-cost, rapid development platform for space exploration research. They are small spacecraft with a mass and volume of up to 12 kg and 12,000 cm3, respectively. To date, CubeSats have only been flown in Low Earth Orbit (LEO), though a large number are currently being designed to be dropped off by a mother ship on Earth escape trajectories intended for Lunar and Martian flyby missions. Advancements in propulsion technologies now enable these spacecraft to achieve capture orbits around the moon and Mars, providing a wealth of scientific data at low-cost. However, the mass, volume and launch constraints of CubeSats severely limit viable propulsion options.
We present an innovative propulsion solution using energy generated by onboard photovoltaic panels to electrolyze water, thus producing combustible hydrogen and oxygen for low-thrust applications. Water has a high storage density allowing for sufficient fuel within volume constraints. Its high enthalpy of formation provides more fuel that translates into increased ∆V and vastly reduced risk for the launch vehicle. This innovative technology poses significant challenges including the design and operation of electrolyzers at ultra-cold temperatures, the efficient separation of the resultant hydrogen and oxygen gases from liquid water in a microgravity environment, as well as the effective utilization of thrust to produce desired trajectories.
Analysis of the gas combustion and flow through the nozzle using both theoretical equations and finite-volume CFD modeling suggests an expected specific impulse of 360 s. Preliminary results from AGI's Satellite Toolkit (STK) indicate that the ΔV produced by the system for an 8kg CubeSat with 6kg of propellant in a LEO orbit (370 km altitude) is sufficient for an earth escape trajectory, lunar capture orbit or even a Mars capture orbit. These results suggest a promising pathway for an in-depth study supported by laboratory experiments to characterize the strengths and weaknesses of the proposed concept.
We present an innovative propulsion solution using energy generated by onboard photovoltaic panels to electrolyze water, thus producing combustible hydrogen and oxygen for low-thrust applications. Water has a high storage density allowing for sufficient fuel within volume constraints. Its high enthalpy of formation provides more fuel that translates into increased ∆V and vastly reduced risk for the launch vehicle. This innovative technology poses significant challenges including the design and operation of electrolyzers at ultra-cold temperatures, the efficient separation of the resultant hydrogen and oxygen gases from liquid water in a microgravity environment, as well as the effective utilization of thrust to produce desired trajectories.
Analysis of the gas combustion and flow through the nozzle using both theoretical equations and finite-volume CFD modeling suggests an expected specific impulse of 360 s. Preliminary results from AGI's Satellite Toolkit (STK) indicate that the ΔV produced by the system for an 8kg CubeSat with 6kg of propellant in a LEO orbit (370 km altitude) is sufficient for an earth escape trajectory, lunar capture orbit or even a Mars capture orbit. These results suggest a promising pathway for an in-depth study supported by laboratory experiments to characterize the strengths and weaknesses of the proposed concept.
ContributorsPothamsetti, Ramana Kumar (Author) / Thangavelautham, Jekanthan (Thesis advisor) / Dahm, Werner J.A (Committee member) / Solanki, Kiran N (Committee member) / Arizona State University (Publisher)
Created2015
Description
Telomerase enzyme is a truly remarkable enzyme specialized for the addition of short, highly repetitive DNA sequences onto linear eukaryotic chromosome ends. The telomerase enzyme functions as a ribonucleoprotein, minimally composed of the highly conserved catalytic telomerase reverse transcriptase and essential telomerase RNA component containing an internalized short template region within the vastly larger non-coding RNA. Even among closely related groups of species, telomerase RNA is astonishingly divergent in sequence, length, and secondary structure. This massive disparity is highly prohibitive for telomerase RNA identification from previously unexplored groups of species, which is fundamental for secondary structure determination. Combined biochemical enrichment and computational screening methods were employed for the discovery of numerous telomerase RNAs from the poorly characterized echinoderm lineage. This resulted in the revelation that--while closely related to the vertebrate lineage and grossly resembling vertebrate telomerase RNA--the echinoderm telomerase RNA central domain varies extensively in structure and sequence, diverging even within echinoderms amongst sea urchins and brittle stars. Furthermore, the origins of telomerase RNA within the eukaryotic lineage have remained a persistent mystery. The ancient Trypanosoma telomerase RNA was previously identified, however, a functionally verified secondary structure remained elusive. Synthetic Trypanosoma telomerase was generated for molecular dissection of Trypanosoma telomerase RNA revealing two RNA domains functionally equivalent to those found in known telomerase RNAs, yet structurally distinct. This work demonstrates that telomerase RNA is uncommonly divergent in gross architecture, while retaining critical universal elements.
ContributorsPodlevsky, Joshua (Author) / Chen, Julian (Thesis advisor) / Mangone, Marco (Committee member) / Kusumi, Kenro (Committee member) / Wilson-Rawls, Norma (Committee member) / Arizona State University (Publisher)
Created2015
Description
In the university setting, when a person wants to conduct research that deals with human subjects, they are required to receive the approval of their Institutional Review Board (IRB). This process takes place to ensure the proposed research is ethical and poses minimal risks to the willing subject. In Indian Country, there is a growing trend where American Indian nations are taking control over regulating research that is conducted within their jurisdictional boundaries.
In my thesis, I discuss the historical background that has led to the IRBs academics are familiar within universities they see today. In addition, I discuss the body of literature that addresses IRBs, human subjects, and the debate on which research should or should not be regulated by universities. I will then, critically analyze the established research protocols that exist in Arizona American Indian tribes. I use Darrell Posey's (1996) idea of Community Controlled Research (CCR) as the framework for my analysis. CCR dictates the people of the community decide the ways in which research is conducted. The purpose of my research is to create recommendations that will assist and inform tribes how to either, strengthen their existing protocols, or create a research protocol that will promotes Community Controlled Research.
In my thesis, I discuss the historical background that has led to the IRBs academics are familiar within universities they see today. In addition, I discuss the body of literature that addresses IRBs, human subjects, and the debate on which research should or should not be regulated by universities. I will then, critically analyze the established research protocols that exist in Arizona American Indian tribes. I use Darrell Posey's (1996) idea of Community Controlled Research (CCR) as the framework for my analysis. CCR dictates the people of the community decide the ways in which research is conducted. The purpose of my research is to create recommendations that will assist and inform tribes how to either, strengthen their existing protocols, or create a research protocol that will promotes Community Controlled Research.
ContributorsTom, Naomi (Author) / Vicenti Carpio, Myla (Thesis advisor) / Killsback, Leo (Committee member) / Tippeconnic, John (Committee member) / Arizona State University (Publisher)
Created2015
Description
This dissertation is a detailed rhetorical analysis of interviews with rice farmers in central Java, Indonesia and documents published by the global NGOs United Nations Food and Agriculture Organization (FAO) and CGIAR. Using theories of materiality, literacies, and environmental rhetorics, I examine how seemingly distinct and disparate humans, organizations, and inanimates are actually entangled agents in a dynamic conversation. I have termed that conversation the discourse of rice farming. Studying local and global together challenges conventional dichotomous thinking about farming and food. Looking at this conversation as an entanglement reveals what Karen Barad has defined in Meeting the Universe Halfway as the intra-relatedness of all agents. I focus on rice farming because rice is a food staple around the world and a major component of global agriculture initiatives by FAO and CGIAR. I argue that farmers construct their jobs in terms of production, food sovereignty, and community. The NGOs construct agriculture in terms of consumption, food security, and poverty alleviation. In my project I emphasize the need for global agents to better account for how farmers construct agriculture. Accounting for how all agents impact the discourse of rice farming is the only way to come to an objective understanding rice farming's impact on local and global scales. My argument adds to the field of environmental rhetorics because most published case studies are about the United States and thus are limited in their applicability. And it enriches global conversations about food security and food justice because it shares accounts from actual farmers who are often conspicuously absent from literature on those topics.
ContributorsCooney, Emily (Author) / Goggin, Peter (Thesis advisor) / Hannah, Mark (Committee member) / Chhetri, Netra (Committee member) / Arizona State University (Publisher)
Created2015