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- Member of: ASU Electronic Theses and Dissertations
- Status: Published
Description
Surgery as a profession requires significant training to improve both clinical decision making and psychomotor proficiency. In the medical knowledge domain, tools have been developed, validated, and accepted for evaluation of surgeons' competencies. However, assessment of the psychomotor skills still relies on the Halstedian model of apprenticeship, wherein surgeons are observed during residency for judgment of their skills. Although the value of this method of skills assessment cannot be ignored, novel methodologies of objective skills assessment need to be designed, developed, and evaluated that augment the traditional approach. Several sensor-based systems have been developed to measure a user's skill quantitatively, but use of sensors could interfere with skill execution and thus limit the potential for evaluating real-life surgery. However, having a method to judge skills automatically in real-life conditions should be the ultimate goal, since only with such features that a system would be widely adopted. This research proposes a novel video-based approach for observing surgeons' hand and surgical tool movements in minimally invasive surgical training exercises as well as during laparoscopic surgery. Because our system does not require surgeons to wear special sensors, it has the distinct advantage over alternatives of offering skills assessment in both learning and real-life environments. The system automatically detects major skill-measuring features from surgical task videos using a computing system composed of a series of computer vision algorithms and provides on-screen real-time performance feedback for more efficient skill learning. Finally, the machine-learning approach is used to develop an observer-independent composite scoring model through objective and quantitative measurement of surgical skills. To increase effectiveness and usability of the developed system, it is integrated with a cloud-based tool, which automatically assesses surgical videos upload to the cloud.
ContributorsIslam, Gazi (Author) / Li, Baoxin (Thesis advisor) / Liang, Jianming (Thesis advisor) / Dinu, Valentin (Committee member) / Greenes, Robert (Committee member) / Smith, Marshall (Committee member) / Kahol, Kanav (Committee member) / Patel, Vimla L. (Committee member) / Arizona State University (Publisher)
Created2013
Description
The &ldquoMormon; Colonies” in Chihuahua, northern Mexico, boast a sizable population of women originally from the United States who have immigrated to these small Mexican towns. This ethnographic study of the immigrant women in the area focuses on questions of citizenship and belonging, and bolsters the scholarship on U.S. American immigrants in Mexico. Using data from 15 unstructured interviews, the women&rsquos; experiences of migration provide a portrait of U.S. American immigrants in a Mexican religious community. Analysis of this data using grounded theory has revealed that these U.S. American women have created a third social space for themselves, to a large degree retaining their original culture, language, and political loyalty. Their stories contribute to the literature on transnational migration, providing an account of the way migrants of privilege interact with their society of settlement.
ContributorsNielsen, Vanessa (Author) / Mean, Lindsey (Thesis advisor) / Téllez, Michelle (Committee member) / Gruber, Diane (Committee member) / Arizona State University (Publisher)
Created2013
Description
Newer communication technologies (CTs) will always vie with more mature technologies for the attention of time-constrained legislators. As continual advances in CT make new methods of communication available to legislators, it is important to understand how newly introduced CTs influence novel and changing legislator behaviors. The mixed-method research presented in this study provides deep insights into the relationships between legislators and the CTs they use. This study offers many contributions, among them: it effectively bridges a gap between existing Internet Enabled CT (IECT) behavioral studies on non-legislators by expanding them to include legislator behavior; it expands existing narrowly focused research into the use of CT by legislators by including both IECT and mature CTs such as face-to-face meetings and telephone; it provides a fresh perspective on the factors that make CTs important to legislators, and it uncovers legislator behaviors that are both useful, and potentially harmful, to the process of democracy in the United States. In addition, this study confirms and extends existing research in areas such as minority party constituent communication frequency, and extends the topic of legislator CT behavior into some unanticipated areas such as constituent selective behaviors and the use of text messaging during floor debates which effectively enable lobbyists and paid consultants to participate real-time in floor debates in the Arizona House and Senate.
ContributorsWest, Joe, 1959- (Author) / Corley, Elizabeth A (Thesis advisor) / Johnston, Erik W., 1977- (Committee member) / Svara, James H. (Committee member) / Arizona State University (Publisher)
Created2014
Description
In the countries of Eastern Europe, the recent history of the communist regimes creates a context rich in various and often times contradictory remembering practices. While normative discourses of memory enacted in official forms of memory such as museums, memorials, monuments, or commemorative rituals attempt to castigate the communism in definite terms, remembering practices enacted in everyday life are more ambiguous and more tolerant of various interpretations of the communist past. This study offers a case study of the ways in which people remember communism in everyday life in Romania. While various inquiries into Eastern Europe's and also Romania's official and intentional forms of memorializing communism abound, few works address remembering practices in their entanglements with everyday life. From a methodological point of view, this study integrates a grounded methodology approach with a rhetorical sensitivity to explore the discourses, objects, events, and practices of remembering communism in Bucharest, the capital city of Romania. In doing so, this inquiry attends not only to the aspects of the present that animate the remembering of communism, but also and more specifically to the set of practices by which the remembering process is performed. The qualitative analysis revealed a number of conceptual categories that clustered around three major themes that describe the entanglements of remembering activities with everyday life. Relating the present to the past, sustaining the past in the present, and pursuing the communist past constitute the ways in which people in Romania live their relationships with the communist past in a way that reveals the complex interplay between private and public forms of memory, but also between the political, social, and cultural aspects of the remembering process. These themes also facilitate a holistic understanding of the rhetorical environment of remembering communism in Romania.
ContributorsPaulesc, Marie-Louise (Author) / de la Garza, Sarah Amira (Thesis advisor) / Brouwer, Dan (Thesis advisor) / Gereboff, Joel (Committee member) / Arizona State University (Publisher)
Created2014
Description
The aim of this study is to test the feasibility of building a storytelling system for older adults to tell and share their life stories based on email. It is measured by the level of participation and people's acceptance of the system. The central goals were to empower people over 60 years old by providing a platform for them to share their wonderful life experience and perspectives on life and lead social services into the digital age by bridging traditional roundtable interaction and modern digital communication. A prototype was built to test the level of participation of the system and follow-up interviews were conducted in order to deeply understand people's acceptance. Content analysis was used to analyze the stories to ascertain what common themes were present. Key design considerations and key factors that affect the feasibility of storytelling system were discussed. This research expands on current research and implementation of Internet-based storytelling system and shed light on the future of combining storytelling with older adults' existing Internet knowledge. Key findings of this research are :(1) Frequency of reminiscence trigger and the number of active participants affect the level of participation collectively. Frequency is considered to be a key determinant. High frequency indicates high level of participation. (2) Categories of topics do not affect the level of participation significantly but serve as key attractions that enhance people's acceptance of the system. (3) Older adults highly accept and get involved in the new email storytelling system. This storytelling program helps them recall their memories and have a profound effect on their own introspection.
ContributorsLi, Yuanyi (Author) / Giard, Jacques R (Thesis advisor) / Margolis, Eric (Committee member) / Larkin, Kyle (Committee member) / Arizona State University (Publisher)
Created2014
Description
As the size and scope of valuable datasets has exploded across many industries and fields of research in recent years, an increasingly diverse audience has sought out effective tools for their large-scale data analytics needs. Over this period, machine learning researchers have also been very prolific in designing improved algorithms which are capable of finding the hidden structure within these datasets. As consumers of popular Big Data frameworks have sought to apply and benefit from these improved learning algorithms, the problems encountered with the frameworks have motivated a new generation of Big Data tools to address the shortcomings of the previous generation. One important example of this is the improved performance in the newer tools with the large class of machine learning algorithms which are highly iterative in nature. In this thesis project, I set about to implement a low-rank matrix completion algorithm (as an example of a highly iterative algorithm) within a popular Big Data framework, and to evaluate its performance processing the Netflix Prize dataset. I begin by describing several approaches which I attempted, but which did not perform adequately. These include an implementation of the Singular Value Thresholding (SVT) algorithm within the Apache Mahout framework, which runs on top of the Apache Hadoop MapReduce engine. I then describe an approach which uses the Divide-Factor-Combine (DFC) algorithmic framework to parallelize the state-of-the-art low-rank completion algorithm Orthogoal Rank-One Matrix Pursuit (OR1MP) within the Apache Spark engine. I describe the results of a series of tests running this implementation with the Netflix dataset on clusters of various sizes, with various degrees of parallelism. For these experiments, I utilized the Amazon Elastic Compute Cloud (EC2) web service. In the final analysis, I conclude that the Spark DFC + OR1MP implementation does indeed produce competitive results, in both accuracy and performance. In particular, the Spark implementation performs nearly as well as the MATLAB implementation of OR1MP without any parallelism, and improves performance to a significant degree as the parallelism increases. In addition, the experience demonstrates how Spark's flexible programming model makes it straightforward to implement this parallel and iterative machine learning algorithm.
ContributorsKrouse, Brian (Author) / Ye, Jieping (Thesis advisor) / Liu, Huan (Committee member) / Davulcu, Hasan (Committee member) / Arizona State University (Publisher)
Created2014
Description
Recently, a student in a Maricopa County, Arizona area school district drowned during a physical education class, resulting in a heightened awareness of school aquatics safety guidelines. The goal of this study was to use Wenger's idea of nurturing a Community of Practice (CoP) with the existing physical education CoP at GFJRHS (school pseudonym), to examine the current curriculum and enhance the program and safety standards. The study duration was a five-week period; the participants were 7th grade males. This action research addressed the following questions: 1.)To what extent does the new swim curriculum increase students' (a) self-efficacy for swimming, (b) self-efficacy for water safety, (c) perception of swim skills, and (d) perception of water safety skills? 2.) How, and to what extent, do students value different observational learning techniques presented during the swim unit? 3.) To what extent does the new swim curriculum increase students' swimming capabilities? 4.) How does working as a Community of Practice influence implementing an enhanced swim curriculum? 5.) What challenges and improvements do participants report during the enhanced curriculum? A triangulation mixed methods design was used to determine whether observational learning techniques and mini aquatics safety lessons incorporated into the curriculum improved students' swimming ability, self-efficacy, and safety knowledge. Pre-and post-test swim assessments, pre- and post-test surveys, focus group interviews and researcher journal observations provided data for the study. Both quantitative and qualitative data were collected to integrate the strengths of the varied forms of research. Cronbach's coefficient α was computed for the reliability of the survey and a multivariate repeated measures analysis of variance (ANOVA) was conducted to determine whether the new swim curriculum increased students' self-efficacy for swimming, self-efficacy for water safety, perception of swim skills, perception of water safety skills, and swimming capabilities. Results of this study indicated students' self-efficacy and perception of water safety skills increased, students' ability and perception of swimming skills increased, students valued all observational learning techniques, and teachers felt that functioning as a CoP was crucial to the process.
ContributorsJonaitis, Sean (Author) / Wetzel, Keith A (Thesis advisor) / Ewbank, Ann D (Thesis advisor) / Darst, Paul W. (Committee member) / Arizona State University (Publisher)
Created2014
Description
ABSTRACT Education policymakers at the national level have initiated reforms in K-12 education for that past several years that have focused on teacher quality and teacher evaluation. More recently, reforms have included legislation that focuses on administrator quality as well. Included in far-reaching recent legislation in Arizona is a requirement that administrators be evaluated on a standards-based evaluation system that is linked to student outcomes. The end result is an annual summative measure of administrator effectiveness that impacts job retention. Because of this, Arizona administrators have become concerned about rapidly becoming proficient in the new evaluation systems. Administrators rarely have the explicit professional development opportunities they need to collaborate on a shared understanding of these new evaluation systems. This action research study focused on a group of eight administrators in a small urban district grappling with a new, complex, and high-stakes administrator evaluation that is a component of an all-encompassing Teacher Incentive Fund Grant. An existing professional learning time was engaged to assist administrators in lessening their concerns and increasing their understanding and use of the evaluation instrument. Activities were designed to engage the administrators in dynamic, contextualized learning. Participants interacted in a group to interpret the meaning of the evaluation instrument share practical knowledge and support each other's acquisition understanding. Data were gathered with mixed methods. Administrators were given pre-and post-surveys prior to and immediately after this six-week innovation. Formal and informal interviews were conduct throughout the innovation. Additionally, detailed records in the form of meeting records and a researcher journal were kept. Qualitative and quantitative data were triangulated to validate findings. Results identified concerns and understanding of administrators as they attempted to come to a shared understanding of the new evaluation instrument. As a result of learning together, their concerns about the use of the instrument lessened. Other concerns however, remained or increased. Administrators found the process of the Administrator Learning Community valuable and felt their understanding and use of the instrument had increased. Intense concerns about the competing priorities and initiatives led to the administrators to consider a reevaluation of the competing initiatives. Implications from this study can be used to help other administrators and professional development facilitators grappling with common concerns.
ContributorsEsmont, Leah W (Author) / Wetzel, Keith (Thesis advisor) / Ewbank, Ann (Thesis advisor) / McNeil, David (Committee member) / Arizona State University (Publisher)
Created2014
Description
The purpose of the study is to explore the identity development and organizational culture of a student organization, the National Association of Latino Fraternal Organizations council (NALFO) by implementing a community of practice approach at a large, public university in southwestern United States. The objective is to construct a sustainable camaraderie among the existing Latino fraternal organizations at the university to influence leadership development, work toward a common vision, and a cohesive and systematic approach to collaboration, consequently transforming organizational culture. This study investigates the factors that contribute to and/or inhibit increased communication and collaboration and to describe the experiences of Latino fraternal members who are purposefully engaged in a community of practice. There are 57 fraternal organizations in five umbrella councils at the university, including predominately Caucasian, historically African American, Latino, and Multicultural groups, whose platforms are commonly leadership, scholarship, and philanthropy. This action research examines the experiences of six NALFO members individually and working as a community with the guidance of a mentor (the researcher). The researcher employs use of an anonymous initial and post electronic survey, a participant personal statement, an intentional and purposeful community of practice, a semi-structured individual interview, and focus groups to collect data. Findings suggest that length of membership and fraternal experience influence participant responses; however, the themes remain consistent. Building relationships, perception (by members and outsiders), identity development, organizational management, and challenging perspectives (from outside influences) are factors that influence the organizational culture of the organization. On the post electronic survey all participants indicate that the implementation of an intentional community of practice can benefit the organization by encouraging participation and increasing communication. While participants suggest activities for encouraging member engagement, they determine that actual participation would be dependent on individual motivation.
ContributorsHeredia, Anna-Maria (Author) / Rund, James (Thesis advisor) / Calleroz White, Mistalene (Thesis advisor) / Corey, Frederick (Committee member) / Arizona State University (Publisher)
Created2013
Description
The economic crisis in 2008 triggered a global financial shockwave that left many wondering about the origins of the crisis. Similarly, in the early twentieth century, Wall Street faced catastrophic losses that set the stage for the Great Depression, which resulted in a decade of economic depression, leaving millions of people out of work. Using discourse analysis to understand how economic crisis is framed through the mainstream press, this research project analyzed the stock market crash of 1929-1932 and the mortgage-backed financial crisis of 2007-2009 through the lens of two mainstream publications, The New York Times and The Wall Street Journal. Comparative analysis focused on explanations for the causes of the crises, attributions of blame, culprits, and proposed solutions emerging in news coverage of the 1929 panic and the 2007-2009 financial crises. Mainstream media accounts of the 2007-2009 crisis are then compared with `alternative media' accounts of crisis causes, culprits, and solutions. These comparative analyses are contextualized historically within economic paradigms of thought, beginning with the classical economists led by Adam Smith and transitioning to the Chicago School.
ContributorsPrice, Eun (Author) / Nadesan, Majia (Thesis advisor) / Gruber, Diane (Committee member) / Ramsey, Ramsey E (Committee member) / Arizona State University (Publisher)
Created2013