Matching Items (11)
Filtering by
- Genre: Masters Thesis
- Creators: Arizona State University
- Creators: Chakraborty, Bijeta
- Member of: ASU Electronic Theses and Dissertations
Description
This study is intended as a catalyst to inspire new ways of thinking by educators, school administrators, and museum educators. It is a study of six K-12 art teachers who have both the technology and the opportunity at their school campuses to use collaborative videoconferencing as part of their instruction in multicultural art, linking their students to the resources of the Smithsonian Institute in Washington D.C. The art unit used for the purpose of this study was Latina/o art. Findings show the Smithsonian American Art Museum program to be of high quality and useful i students see the connection between identity of self and multicultural art.
ContributorsFosnight, Estelle (Author) / Erickson, Mary (Thesis advisor) / Stokrocki, Mary (Committee member) / Young, Bernard (Committee member) / Arizona State University (Publisher)
Created2013
Description
Efficiency of components is an ever increasing area of importance to portable applications, where a finite battery means finite operating time. Higher efficiency devices need to be designed that don't compromise on the performance that the consumer has come to expect. Class D amplifiers deliver on the goal of increased efficiency, but at the cost of distortion. Class AB amplifiers have low efficiency, but high linearity. By modulating the supply voltage of a Class AB amplifier to make a Class H amplifier, the efficiency can increase while still maintaining the Class AB level of linearity. A 92dB Power Supply Rejection Ratio (PSRR) Class AB amplifier and a Class H amplifier were designed in a 0.24um process for portable audio applications. Using a multiphase buck converter increased the efficiency of the Class H amplifier while still maintaining a fast response time to respond to audio frequencies. The Class H amplifier had an efficiency above the Class AB amplifier by 5-7% from 5-30mW of output power without affecting the total harmonic distortion (THD) at the design specifications. The Class H amplifier design met all design specifications and showed performance comparable to the designed Class AB amplifier across 1kHz-20kHz and 0.01mW-30mW. The Class H design was able to output 30mW into 16Ohms without any increase in THD. This design shows that Class H amplifiers merit more research into their potential for increasing efficiency of audio amplifiers and that even simple designs can give significant increases in efficiency without compromising linearity.
ContributorsPeterson, Cory (Author) / Bakkaloglu, Bertan (Thesis advisor) / Barnaby, Hugh (Committee member) / Kiaei, Sayfe (Committee member) / Arizona State University (Publisher)
Created2013
Description
This study gathers the expertise of three reputable art teachers, through analysis of qualitative data collected during in-person interviews and classroom observations, as they share their experiences and insights regarding successful methods of motivating and engaging students in their beginning-level art classes. Various works of literature regarding educational motivation are reviewed, and this study begins to address the need for additional research involving this issue, as it applies to teachers of art. Commonalities between the motivational tactics of the participating teachers are discussed, as well as comparison of findings to existing literature. This may be useful to art teachers who are new to the field or who are seeking information regarding successful methods of encouraging motivation and engagement in their beginning -level art classes.
ContributorsClark, Erica (Author) / Young, Bernard (Thesis advisor) / Erickson, Mary (Committee member) / Stokrocki, Mary (Committee member) / Arizona State University (Publisher)
Created2012
Description
Class D Amplifiers are widely used in portable systems such as mobile phones to achieve high efficiency. The demands of portable electronics for low power consumption to extend battery life and reduce heat dissipation mandate efficient, high-performance audio amplifiers. The high efficiency of Class D amplifiers (CDAs) makes them particularly attractive for portable applications. The Digital class D amplifier is an interesting solution to increase the efficiency of embedded systems. However, this solution is not good enough in terms of PWM stage linearity and power supply rejection. An efficient control is needed to correct the error sources in order to get a high fidelity sound quality in the whole audio range of frequencies. A fundamental analysis on various error sources due to non idealities in the power stage have been discussed here with key focus on Power supply perturbations driving the Power stage of a Class D Audio Amplifier. Two types of closed loop Digital Class D architecture for PSRR improvement have been proposed and modeled. Double sided uniform sampling modulation has been used. One of the architecture uses feedback around the power stage and the second architecture uses feedback into digital domain. Simulation & experimental results confirm that the closed loop PSRR & PS-IMD improve by around 30-40 dB and 25 dB respectively.
ContributorsChakraborty, Bijeta (Author) / Bakkaloglu, Bertan (Thesis advisor) / Garrity, Douglas (Committee member) / Ozev, Sule (Committee member) / Arizona State University (Publisher)
Created2012
Description
Art museums are institutions with a mission to not only preserve art and culture for the public, but to provide visitors with an educational experience. This qualitative case study includes three art museums in the Phoenix Metropolitan Area: a university art museum, a large public museum in Downtown Phoenix, and a contemporary art museum in the city of Scottsdale. This research study sought to identify the ways in which eight art museum employees from the education and administration departments identify their institutions as educational. Data was collected and analyzed through the methods of direct observations and field notes, one-on-one interviews, and photographs of educational programming.
After examining these art museums and conducting eight interviews, a description of each observation is displayed using examples of photographs and field notes. Although findings suggest a variety of educational programs for a range of visitors in each institution, all three museums offered comparable programs, activities, and events. This research study revealed similar ideas, themes, and perspectives between art museum educators and administrators. Findings indicate the importance of collaboration between both museum departments in order to ensure the success of their museums. All eight participants in the study had a passion for art and art museums as well as visitor education. Additionally, participants had concurrent thoughts in their interviews regarding concepts of educational programming, cultural diversity approaches, art museum fundamental roles, and overall educational goals.
After examining these art museums and conducting eight interviews, a description of each observation is displayed using examples of photographs and field notes. Although findings suggest a variety of educational programs for a range of visitors in each institution, all three museums offered comparable programs, activities, and events. This research study revealed similar ideas, themes, and perspectives between art museum educators and administrators. Findings indicate the importance of collaboration between both museum departments in order to ensure the success of their museums. All eight participants in the study had a passion for art and art museums as well as visitor education. Additionally, participants had concurrent thoughts in their interviews regarding concepts of educational programming, cultural diversity approaches, art museum fundamental roles, and overall educational goals.
ContributorsLechner, Nicole (Author) / Young, Bernard (Thesis advisor) / Stokrocki, Mary (Committee member) / Watts, Jamie (Committee member) / Arizona State University (Publisher)
Created2018
Description
The role of an art educator is characteristically dualistic and paradoxical. Not only are most art educators trained as artists, but they also receive instruction on theories and practices used in art education. The purpose of the study was to examine how community college ceramic instructors identify themselves within their dual roles as teacher-artists. I studied if and how the teacher-artist places emphasis on one position over the other, or how they successfully synthesized these positions. I also investigated the phenomenon by considering the why, how and which role they accentuated, as well as it affects and influences on their creative and teaching activities. By using a feminist theory, the research uncovered information on how gender may or may not affect their careers, as well as their identities.
ContributorsKeele, Teresa (Author) / Young, Bernard (Thesis advisor) / Stokrocki, Mary (Committee member) / Watts, Jamie (Committee member) / Arizona State University (Publisher)
Created2018
Description
Art is a form of spiritual expression that is thriving in many Indigenous cultures. It can take many forms, meanings and have a multitude of emotional, mental, physical and spiritual effects on its creator as well as its audience. Amongst American Indians, art has been a method for maintaining holistic well-being intended to heal and cope with traumatic experiences. In this thesis, I examine the western societal and cultural influences that have led to the loss of cultural identity and examine approaches and practices that aim to re-establish a resilient connection to identity and well-being using art as a spiritual catalyst. Literary research and articles were reviewed related to the issue of art as a form of spiritual expression in Indigenous cultures. An autoethnography was conducted with the intent to record and reflect on the well-being of the researcher in relation to her artistic expression. Journaling and vlogging were used as research methods and painting, sketching, and beading was used as artistic methods. Over the course of six months, over 50 videos with 30 hours of raw footage were recorded; averaging 2 hours per day. The results are reflected in the researchers free-flowing and emotionally driven reflection of experiences that have driven her artwork. This thesis supports the establishment of art as a form of spiritual expression for transforming the current western focused health care paradigm to one that recognizes, values and employs Indigenous insight, methodologies, worldviews, culture and spirituality.
ContributorsRobbins, Marlena (Author) / Romero-Little, Eunice (Thesis advisor) / Marley, Tennille L (Committee member) / Meders, Jacob (Committee member) / Arizona State University (Publisher)
Created2018
Description
In this thesis, a digital input class D audio amplifier system which has the ability
to reject the power supply noise and nonlinearly of the output stage is presented. The main digital class D feed-forward path is using the fully-digital sigma-delta PWM open loop topology. Feedback loop is used to suppress the power supply noise and harmonic distortions. The design is using global foundry 0.18um technology.
Based on simulation, the power supply rejection at 200Hz is about -49dB with
81dB dynamic range and -70dB THD+N. The full scale output power can reach as high as 27mW and still keep minimum -68dB THD+N. The system efficiency at full scale is about 82%.
to reject the power supply noise and nonlinearly of the output stage is presented. The main digital class D feed-forward path is using the fully-digital sigma-delta PWM open loop topology. Feedback loop is used to suppress the power supply noise and harmonic distortions. The design is using global foundry 0.18um technology.
Based on simulation, the power supply rejection at 200Hz is about -49dB with
81dB dynamic range and -70dB THD+N. The full scale output power can reach as high as 27mW and still keep minimum -68dB THD+N. The system efficiency at full scale is about 82%.
ContributorsBai, Jing (Author) / Bakkaloglu, Bertan (Thesis advisor) / Arizona State University (Publisher)
Created2015
Description
This qualitative research study was about art teachers’ perceptions and practices of cultural diversity and its implications for the U.S. The purpose of the study was to provide a rationale for the need for learning institutions to recognize the changing demographics and to respond to the potential educational implications of the new demographics as they prepare their art teachers to educate diverse student populations. The study involved six art teachers who teach in schools with students from diverse cultural backgrounds. To collect data, interviews with participants were transcribed and analyzed. Analysis of teacher interviews showed the importance of helping art teachers to obtain the skills, attitudes, dispositions and knowledge to work effectively with students from diverse cultural backgrounds. The richness of the descriptions obtained from the interviews provides insight into multicultural art education in schools. The results of this study might help art educators and policy makers understand the need for more awareness of multicultural education and its impact on teachers, parents, administrators and students. This study concludes with suggestions on art education, including the need to develop curriculum that are inclusive to multicultural students, especially Islamic from cultures. Art education programs in universities should produce teachers who are prepared for the cultural diversity in their classrooms. It is essential that teachers accept and implement changes in their communities, in their schools, and in their teaching in order to better serve students of culturally diverse backgrounds.
ContributorsMasrya, Mawadah (Author) / Young, Bernard (Thesis advisor) / Stokrocki, Mary (Committee member) / Erickson, Mary (Committee member) / Arizona State University (Publisher)
Created2016
Description
In the fifty-five years since its founding in 1966, Goodman Gallery of South Africa has established itself as a renowned and commercially successful art gallery of contemporary African art. Established during the height of apartheid, Goodman Gallery was the only venue to show Black African artists amongst their white counterparts. As the art world and market has expanded globally, so has the role of commercial galleries in maintaining, creating, and establishing new international artists’ work to be exhibited and sold. With the market becoming ethnically and culturally inclusive, the gallery has been a pioneer in embedding those goals in its mission since the beginning. Because it is unusual for commercial galleries to have a long commitment to confronting power structures, I will examine Goodman within a global context as both an anti-racist business and a space whose owner seeks equal representation in the art world by exhibiting new and established artists, including David Goldblatt, David Koloane, Sam Nhlengethwa, Sue Williamson, William Kentridge, Kapwani Kiwanga, Nolan Oswald Dennis, Shirin Neshat, and Alfredo Jaar. With an emphasis on its stated mission, I construct a narrative of the gallery as a critical space for social and political change within the growing interest of the Western market.
ContributorsCundill, Samantha (Author) / Fahlman, Betsy (Thesis advisor) / Codell, Julie (Committee member) / Reilly, Maura (Committee member) / Arizona State University (Publisher)
Created2021