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ASU Electronic Theses and Dissertations


Date Range
2004 2017

Power rating photovoltaic modules at six irradiance and four temperature matrix levels of IEC 61853-1 draft standard is one of the most important requirements to accurately predict energy production of photovoltaic modules at different climatic conditions. Two studies were carried out in this investigation: a measurement repeatability study and a translation procedure validation study. The repeatability study was carried out to define a testing methodology that allows generating repeatable power rating results under outdoor conditions. The validation study was carried out to validate the accuracy of the four translation procedures: the first three procedures are from the IEC 60891 standard ...

Contributors
Paghasian, Karen Yuag, Tamizhmani, Govindasamy, Madakannan, Arunachalandar, et al.
Created Date
2010

Today, many wireless networks are single-channel systems. However, as the interest in wireless services increases, the contention by nodes to occupy the medium is more intense and interference worsens. One direction with the potential to increase system throughput is multi-channel systems. Multi-channel systems have been shown to reduce collisions and increase concurrency thus producing better bandwidth usage. However, the well-known hidden- and exposed-terminal problems inherited from single-channel systems remain, and a new channel selection problem is introduced. In this dissertation, Multi-channel medium access control (MAC) protocols are proposed for mobile ad hoc networks (MANETs) for nodes equipped with a single ...

Contributors
Moon, Yuhan, Syrotiuk, Violet R, Huang, Dijiang, et al.
Created Date
2010

The Juglandaceae (walnuts, hickories, pecans) has one of the best-documented fossil records in the Northern Hemisphere. The oldest modern genus, Cyclocarya, today restricted to China, first appears in the late Paleocene (57 ma) of North Dakota, USA. Unlike walnuts and pecans that produce edible fruits dispersed by mammals, Cyclocarya fruits are small nutlets surrounded by a prominent circular wing, and are thought to be wind- or water-dispersed. The current study provides the first evidence that fossil fruits were different from modern forms in the number and organization of their attachment to reproductive branches, and in their anatomical structure. Unlike the ...

Contributors
Taylor, Witt, Pigg, Kathleen B, Wojciechowski, Martin F, et al.
Created Date
2010

A study was conducted to assess the effects of generational status on various measures of stigmatization, acculturative stress, and perceived social and interpersonal threat within the Mexican heritage population in the Southwest. The role of the fear of stigma by association, regardless of actual experiences of stigmatization, was investigated, including its relationships with acculturative stress, perceived threat, and social distancing. Exploratory analyses indicated that first generation Mexican Americans differed significantly from second generation Mexican Americans on the perception of Mexican nationals as ingroup members, the fear of stigma by association by Americans, and levels of acculturative stress. Additional analyses indicated ...

Contributors
Boyd, Brenna Margaret, Knight, George P, Kwan, Sau, et al.
Created Date
2010

ABSTRACT Diné Education is equal and is as valid as this nation's mainstream education, yet it does not share the same ideas, processes or goals as its counterpart. It is more complicated because it is based on oral traditions and the philosophies of Hózhó, a construct that requires a learner to embrace one's surroundings, actions, interactions, and being. A central part of Diné education focuses on spirituality and self awareness which are intertwined with every dimension of this universe. In order to become educated in the Diné world a learner must first learn to "walk in beauty" and have a ...

Contributors
Neezzhoni, Dmitriy Zoxjkie, Romero-Little, Mary Eunice, Brayboy, Bryan, et al.
Created Date
2010

This dissertation is focused on environmental releases from U.S. wastewater infrastructure of recently introduced, mass-produced insecticides, namely neonicotinoids as well as fipronil and its major degradates (sulfone, sulfide, amide, and desulfinyl derivatives), jointly known as fiproles. Both groups of compounds recently have caught the attention of regulatory agencies worldwide due to their toxic effects on pollinators and on aquatic invertebrates at very low, part-per-trillion levels (Chapter 1). Mass balance studies conducted for 13 U.S. wastewater treatment plants (WWTPs) showed ubiquitous occurrence (3-666 ng/L) and persistence of neonicotinoids (Chapter 2). For the years 2001 through 2016, a longitudinal nationwide study was ...

Contributors
Sadaria, Akash Mahendra, Halden, Rolf, Fraser, Matthew, et al.
Created Date
2017

User satisfaction is pivotal to the success of mobile applications. At the same time, it is imperative to maximize the energy efficiency of the mobile device to ensure optimal usage of the limited energy source available to mobile devices while maintaining the necessary levels of user satisfaction. However, this is complicated due to user interactions, numerous shared resources, and network conditions that produce substantial uncertainty to the mobile device's performance and power characteristics. In this dissertation, a new approach is presented to characterize and control mobile devices that accurately models these uncertainties. The proposed modeling framework is a completely data-driven ...

Contributors
Gaudette, Benjamin David, Vrudhula, Sarma, Wu, Carole-Jean, et al.
Created Date
2017

Lesbian, gay and bisexual (LGB) individuals are exposed to specific stressors due to their sexual minority status. One such stressor may result from the negative family reactions to one’s romantic partner. Encountering this stress may be especially harmful for LGB individuals’ emotional well-being, as it could be considered a “double rejection”: that of their partner and possibly their own sexual orientation. The stress surrounding family members’ negative attitudes about their partner may affect how one feels about their partner. Furthermore, there may be individual differences that affect how an individual may perceive and respond to this stress. Specifically, one’s attachment ...

Contributors
Borders, Jessica, Randall, Ashley K, Pereira, Jennifer K, et al.
Created Date
2017

To be a versatile violinist, one needs interdependence of aural, visual and kinesthetic skills. This thesis introduces aural, visual and kinesthetic learning modalities, and explores the way each is used in the Suzuki, Paul Rolland, Orff, Kodály, and Dalcroze methods, as well as in Edwin Gordon’s Musical Learning Theory. Other methods and pedagogical approaches were consulted and influential in developing the curriculum, such as the teaching of Mimi Zweig, but were not included in this paper either because of an overlap with other methods or insufficient comparable material. This paper additionally presents a new curriculum for teaching beginning violin that ...

Contributors
Tang, Tee Tong, Swartz, Jonathan, Schmidt, Margaret, et al.
Created Date
2017

Online social networks are the hubs of social activity in cyberspace, and using them to exchange knowledge, experiences, and opinions is common. In this work, an advanced topic modeling framework is designed to analyse complex longitudinal health information from social media with minimal human annotation, and Adverse Drug Events and Reaction (ADR) information is extracted and automatically processed by using a biased topic modeling method. This framework improves and extends existing topic modelling algorithms that incorporate background knowledge. Using this approach, background knowledge such as ADR terms and other biomedical knowledge can be incorporated during the text mining process, with ...

Contributors
Yang, Jian, Gonzalez, Graciela, Davulcu, Hasan, et al.
Created Date
2017

This collection includes most of the ASU Theses and Dissertations from 2011 to present. ASU Theses and Dissertations are available in downloadable PDF format; however, a small percentage of items are under embargo. Information about the dissertations/theses includes degree information, committee members, an abstract, supporting data or media.

In addition to the electronic theses found in the ASU Digital Repository, ASU Theses and Dissertations can be found in the ASU Library Catalog.

Dissertations and Theses granted by Arizona State University are archived and made available through a joint effort of the ASU Graduate College and the ASU Libraries.

For more information or questions about this collection contact or visit the Digital Repository ETD Library Guide or contact the ASU Graduate College at gradformat@asu.edu.