Matching Items (71)
Description
Smart home system (SHS) is a kind of information system aiming at realizing home automation. The SHS can connect with almost any kind of electronic/electric device used in a home so that they can be controlled and monitored centrally. Today's technology also allows the home owners to control and monitor the SHS installed in their homes remotely. This is typically realized by giving the SHS network access ability. Although the SHS's network access ability brings a lot of conveniences to the home owners, it also makes the SHS facing more security threats than ever before. As a result, when designing a SHS, the security threats it might face should be given careful considerations. System security threats can be solved properly by understanding them and knowing the parts in the system that should be protected against them first. This leads to the idea of solving the security threats a SHS might face from the requirements engineering level. Following this idea, this paper proposes a systematic approach to generate the security requirements specifications for the SHS. It can be viewed as the first step toward the complete SHS security requirements engineering process.
ContributorsXu, Rongcao (Author) / Ghazarian, Arbi (Thesis advisor) / Bansal, Ajay (Committee member) / Lindquist, Timothy (Committee member) / Arizona State University (Publisher)
Created2013
Description
Teacher learning in the workplace is situated within a complex context involving the individual and multiple aspects of an educational organization. The present action research study uses a socio-constructionist inquiry lens to further research the local and multifaceted nature of professional learning in schools. The goal is to re-conceptualize professional development away from reductionist approaches that assume teacher practice can be isolated, packaged, and directly transferable into the classroom. The present study examines how lesson study can structure interdisciplinary professional learning to address the current gap in the literature regarding professional development of secondary specialty teachers. Five teachers participated in two lesson study cycles for a period of 13-weeks. This study focused on how teachers co-construct pedagogical knowledge and the extent to which they make changes to their practice. Using a sequential mixed methods research design, this study collected qualitative and quantitative data in three phases. In the initial phase, participants completed a demographical survey and shared a digital ethnography of their philosophy of teaching. Phase two consisted of video recordings for two lesson study cycles. Phase three involved a second survey and semi-structured interviews. Classroom observations were conducted during the first and last phase of the study. All qualitative data was analyzed inductively using open and thematic coding. Cross-case analysis was employed at the analysis stage to integrate data tools for the purpose of complementarity. Results suggest lesson study was an effective, job-embedded model that supports active and continuous professional development that is sustained and transferrable to the classroom. The type of disposition reported and displayed by teachers changed positively over time having transformational effects in the depth of relationships among teachers, increasing co-creation of pedagogical knowledge, and increasing reflectiveness. Teachers' level of openness to learning related to higher levels of effective practices implemented during lessons. Further research is needed to examine the ways in which teacher disposition influences professional learning when secondary specialty teachers engage in lesson study.
ContributorsMesa-Lema, Liliana (Author) / Carlson, David L. (Thesis advisor) / Barnard, Wendy (Committee member) / Medrano, Juan (Committee member) / Arizona State University (Publisher)
Created2014
Description
ABSTRACT Counselors at a public community college who teach a first-year college success course to developmental education students do not have effective opportunities or a systematic method to develop their teaching practice. Moreover, like a majority of community college and university instructors, many counselors do not have formal training in instruction. Since the retention and persistence rates of developmental education students are low when compared to non-developmental education students, and the purpose of the college success course is to increase developmental education student success, it is imperative that instructors of the college success course are well-trained to provide high quality learning experiences. The researcher implemented the Lesson Study (LS) professional learning experience in order to increase the collaboration amongst counselors in their efforts to improve their teaching practice as well as improve the quality of the learning experience for developmental education students, consequently potentially improving their retention and persistence. The researcher facilitated a mixed-method study to explore how instructors made meaning of their teaching practice as well as what changes they made to their instructional practice while engaging in LS. The researcher utilized qualitative means to analyze the following data: (1) instructors' weekly reflective journals, (2) semi-structured interviews with instructors after each cycle of LS, (3) video recordings of LS debrief meetings, and (4) video recordings of LS planning meetings. The researcher utilized quantitative means to analyze the following data: (1) pre/post instructor surveys on self-efficacy, and (2) 1,235 student questionnaires regarding LS lessons and non-LS lessons. Analysis of the qualitative data demonstrated that how counselors made meaning of their LS experience seemed to correlate with positive features attributed to the practice of LS in the research literature such as increased collaboration and in-depth reflection as well as positive changes in instructional practices and an increased focus on learning from practice. In addition, analysis of the qualitative and quantitative data showed that lessons created through LS produced a higher quality learning experience for students than lessons that were not created through LS. Moreover, the analysis of the data showed an increase in instructors' efficacy for teaching.
ContributorsLucas, Miguel (Author) / Carlson, David L. (Thesis advisor) / Barnard, Wendy (Committee member) / Haas, Eric (Committee member) / Arizona State University (Publisher)
Created2014
Description
Undergraduate teacher preparation programs face scrutiny regarding pre-service teachers' preparation upon graduation. Specifically, scholars contend that teacher preparation programs do not adequately prepare pre-service teachers to plan for effective instruction. Situated in the Mary Lou Fulton Teachers College at Arizona State University, this action research study used the Theory of Pedagogical Content Knowledge to examine (a) how pre-service teachers developed unit planning practices using the Backward Design framework and (b) the pedagogical teaching practices used as they implemented the unit plan in the classroom. During the student teaching course, pre-service teachers received instruction on how to use the Backward Design framework to plan a unit of instruction to implement in their placement classroom. Results from the mixed-methods study provided evidence that Backward Design was an effective way for pre-service teachers to plan instruction. Results from the study indicated that implementing and reflecting on lessons taught from the unit plan contributed to the pedagogical teaching practices used in the classroom. Furthermore, results demonstrated that designing, implementing, and reflecting on the unit plan contributed to a shift in how participants viewed themselves. Through the study, they began to view themselves more as a teacher, than a pre-service student teacher. Keywords: teacher preparation programs, unit planning, instructional practices
ContributorsBoozer, April (Author) / Carlson, David (Thesis advisor) / Barnard, Wendy (Committee member) / Holmes, Shaun (Committee member) / Arizona State University (Publisher)
Created2014
Description
Mentor teachers have a significant impact on pre-service teachers. Unfortunately, mentors are often underprepared for their role, and thus, the potential learning from a student teaching experience is not maximized. Mary Lou Fulton Teachers College at Arizona State University provides training to mentors who host pre-service teachers during their student teaching experience. Training is delivered in two formats: online prior to the start of the semester and face-to-face each month throughout the semester. This action research study looked at how training contributes to mentor understanding and actions in supporting teacher candidates and how mentor support impacts teacher candidate performance. The study included two mentor/teacher candidate dyads and one university site coordinator. Qualitative and quantitative data were collected from a variety of sources including observations of mentor trainings, teacher candidate lessons, and coaching conversations. Additional data sources included semi-structured interviews with mentors, teacher candidates, and the site coordinator. Analysis of data found that training may contribute to mentor understanding, but other factors matter too. The data also indicated that current training is insufficient at producing all desired mentor behaviors. With respect to the ways that mentors support teacher candidates, this study found that mentors play a multifaceted role, provide ongoing feedback, and employ various strategies during coaching conversations. This study found mentors help teacher candidates see their performance through the eyes of an experienced educator. Modeling and coaching helped teacher candidates improve. This study also suggests a positive, professional relationship between mentor/mentee and certain teacher candidate characteristics such as openness to feedback facilitate learning from a mentor.
ContributorsBorden, Ryen (Author) / Carlson, David (Thesis advisor) / Barnard, Wendy (Committee member) / Rojas, Michelle (Committee member) / Arizona State University (Publisher)
Created2014
Description
Peer learning is one of the longest established and most intensively researched forms of learning. As a form of peer learning, peer tutoring is characterized by specific role-taking as tutor or tutee with high focus on curriculum content. In the late 18th century, Andrew Bell undoubtedly became the first person in the world to use peer tutoring in a systematic fashion within a school setting. Due to its miraculous success, Bell affirmed that peer tutoring was the new method of practical education and was essential to every academic institution. Early in American education, teachers relied on certain students to teach others (i.e., peer tutoring) but this occurred on an informal, impromptu, as needed basis. This type of peer tutoring lasted well into the 20th century. A recent change in the traditional face of peer tutoring arrangements for U.S. schools has occurred due to more than 30 years of research at four major tutoring centers. Peer tutoring has moved away from an informal and casual approach to a more formal and robust method of teaching and learning. However, at the researcher's high school, peer tutoring was still very casual, informal, and practically non-existent. Consequently, the researcher created a peer tutoring club, and developed, and implemented a peer tutoring program. The researcher conducted a mixed-methods study with design-based research (DBR) as the preferred research design in order to discover what constitutes an ideal peer tutor and an ideal peer tutoring session. The researcher utilized qualitative means to analyze the following data: 1) field notes, 2) impromptu interviews, 3) questionnaires, 4) focus group interviews, and 5) a semi-structured interview. The researcher utilized quantitative means to analyze the following data: 1) sessions tutored survey and 2) archival data (e.g., daily attendance, school records). Analysis of qualitative and quantitative data suggested that the ideal peer tutor was qualified (e.g., desire, character traits, content mastery), trained (e.g., responsibilities, methodologies, procedures), and experienced. Likewise, in addition to having an ideal peer tutor, an ideal peer tutoring session took place in an environment conducive to learning and tutees were prepared and actively participated.
ContributorsJohnson, Brian (Author) / Carlson, David (Thesis advisor) / Barnard, Wendy (Committee member) / Moore, David (Committee member) / Arizona State University (Publisher)
Created2014
Description
Disparities exist among minorities in educational a ttainment. The gap widens when examining access to higher education and persi stence rates among minority males as compared to their white counterparts and minorit y females. The purpose of this action research study was to explore the impact of a recip rocal mentoring model between faculty and minority male students in an effort to examine the effects on student persistence and the students' academic experience. The researcher attempted to examine mentoring relationships, the process of reciprocal mentoring, and the effects on persistence and the students' academic experience f or the purpose of learning about one another's perspectives. This study investigated min ority male persistence within Chandler-Gilbert Community College (CGCC). Persiste nce was defined as a student who enrolled during the fall 2013 academic semester and continued at the same institution or transferred to another two-year or four-year instit ution working on degree completion. The author used a mixed methods design and used Cri tical Race Theory (CRT) as the theoretical framework by which to examine issues pe rtaining to minority male student perspectives and experiences. The results yielded e ight assertions related to minority male retention and persistence.
ContributorsWendt, Jill Lynette (Author) / Carlson, David L. (Thesis advisor) / Barnard, Wendy (Thesis advisor) / Glasper, Rufus (Committee member) / Arizona State University (Publisher)
Created2014
Description
The Internet is transforming its look, in a short span of time we have come very far from black and white web forms with plain buttons to responsive, colorful and appealing user interface elements. With the sudden rise in demand of web applications, developers are making full use of the power of HTML5, JavaScript and CSS3 to cater to their users on various platforms. There was never a need of classifying the ways in which these languages can be interconnected to each other as the size of the front end code base was relatively small and did not involve critical business logic. This thesis focuses on listing and defining all dependencies between HTML5, JavaScript and CSS3 that will help developers better understand the interconnections within these languages. We also explore the present techniques available to a developer to make his code free of dependency related defects. We build a prototype tool, HJCDepend, based on our model, which aims at helping developers discover and remove defects early in the development cycle.
ContributorsVasugupta (Author) / Gary, Kevin (Thesis advisor) / Lindquist, Timothy (Committee member) / Bansal, Ajay (Committee member) / Arizona State University (Publisher)
Created2014
Description
The State of Arizona mandates that students with superior intellect or abilities, or identified gifted students, receive appropriate gifted education and services in order to achieve at levels commensurate with their intellect and abilities. Additionally, the State of Arizona adopted the Arizona College and Career Ready Standards (AZCCRS) initiative. This investigation explores if, according to the perceptions of gifted educators, the AZCCRS support a gifted mathematic curriculum and pedagogy at the elementary level which is commensurate with academic abilities, potential, and intellect of these mathematically gifted students, what the relationships are between exemplary gifted curriculum and pedagogy and the AZCCRS, and exactly how the gifted education specialists charged with meeting the academic and intellectual needs and potential of their gifted students interpret, negotiate, and implement the AZCCRS.
This study utilized a qualitative approach and a variety of instruments to gather data, including: profile questionnaires, semi-structured pre-interviews, reflective journals, three group discussion sessions, and semi-structured post interviews. The pre- and post interviews as well as the group discussion sessions were audiotape recorded and transcribed. A three stage coding process was utilized on the questionnaires, interviews, discussion sessions, and journal entries.
The results and findings demonstrated that AZCCRS clearly support exemplary gifted mathematic curriculum and practices at the elementary level, that there are at least nine distinct relationships between the AZCCRS and gifted pedagogy, and that the gifted education specialists interpret, negotiate, and implement the AZCCRS uniquely in at least four distinct ways, in their mathematically gifted pullout classes.
This study utilized a qualitative approach and a variety of instruments to gather data, including: profile questionnaires, semi-structured pre-interviews, reflective journals, three group discussion sessions, and semi-structured post interviews. The pre- and post interviews as well as the group discussion sessions were audiotape recorded and transcribed. A three stage coding process was utilized on the questionnaires, interviews, discussion sessions, and journal entries.
The results and findings demonstrated that AZCCRS clearly support exemplary gifted mathematic curriculum and practices at the elementary level, that there are at least nine distinct relationships between the AZCCRS and gifted pedagogy, and that the gifted education specialists interpret, negotiate, and implement the AZCCRS uniquely in at least four distinct ways, in their mathematically gifted pullout classes.
ContributorsDohm, Dianna (Author) / Carlson, David L. (Thesis advisor) / Barnard, Wendy (Committee member) / Moses, Lindsey (Committee member) / Arizona State University (Publisher)
Created2014
Description
The processing of large volumes of RDF data require an efficient storage and query processing engine that can scale well with the volume of data. The initial attempts to address this issue focused on optimizing native RDF stores as well as conventional relational databases management systems. But as the volume of RDF data grew to exponential proportions, the limitations of these systems became apparent and researchers began to focus on using big data analysis tools, most notably Hadoop, to process RDF data. Various studies and benchmarks that evaluate these tools for RDF data processing have been published. In the past two and half years, however, heavy users of big data systems, like Facebook, noted limitations with the query performance of these big data systems and began to develop new distributed query engines for big data that do not rely on map-reduce. Facebook's Presto is one such example.
This thesis deals with evaluating the performance of Presto in processing big RDF data against Apache Hive. A comparative analysis was also conducted against 4store, a native RDF store. To evaluate the performance Presto for big RDF data processing, a map-reduce program and a compiler, based on Flex and Bison, were implemented. The map-reduce program loads RDF data into HDFS while the compiler translates SPARQL queries into a subset of SQL that Presto (and Hive) can understand. The evaluation was done on four and eight node Linux clusters installed on Microsoft Windows Azure platform with RDF datasets of size 10, 20, and 30 million triples. The results of the experiment show that Presto has a much higher performance than Hive can be used to process big RDF data. The thesis also proposes an architecture based on Presto, Presto-RDF, that can be used to process big RDF data.
This thesis deals with evaluating the performance of Presto in processing big RDF data against Apache Hive. A comparative analysis was also conducted against 4store, a native RDF store. To evaluate the performance Presto for big RDF data processing, a map-reduce program and a compiler, based on Flex and Bison, were implemented. The map-reduce program loads RDF data into HDFS while the compiler translates SPARQL queries into a subset of SQL that Presto (and Hive) can understand. The evaluation was done on four and eight node Linux clusters installed on Microsoft Windows Azure platform with RDF datasets of size 10, 20, and 30 million triples. The results of the experiment show that Presto has a much higher performance than Hive can be used to process big RDF data. The thesis also proposes an architecture based on Presto, Presto-RDF, that can be used to process big RDF data.
ContributorsMammo, Mulugeta (Author) / Bansal, Srividya (Thesis advisor) / Bansal, Ajay (Committee member) / Lindquist, Timothy (Committee member) / Arizona State University (Publisher)
Created2014