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- Genre: Masters Thesis
- Member of: Theses and Dissertations
Description
Photovoltaic (PV) modules appear to have three classifications of failure: Infant mortality, normal-life failure, and end-of-life failure. Little is known of the end-of-life failures experienced by PV modules due to their inherent longevity. Accelerated Life Testing (ALT) has been at the crux of this lifespan prediction; however, without naturally failing modules an accurate acceleration factor cannot be determined for use in ALT. By observing modules that have been aged in the field, a comparison can be made with modules undergoing accelerated testing. In this study an investigation on about 1900 aged (10-17 years) grid-tied PV modules installed in the desert climatic condition of Arizona was undertaken. The investigation was comprised of a check sheet that documented any visual defects and their severity, infrared (IR) scanning, and current-voltage (I-V) curve measurements. After data was collected on modules, an analysis was performed to classify the failure modes and to determine the annual performance degradation rates.
ContributorsSuleske, Adam Alfred (Author) / Tamizhmani, Govindasamy (Thesis advisor) / Rogers, Bradley (Committee member) / Macia, Narciso (Committee member) / Arizona State University (Publisher)
Created2010
… rates. Date Created 2010 Contributors Suleske, Adam Alfred (Author) Tamizhmani, Govindasamy (Thesis advisor) … Statement of Responsibility by Adam Alfred Suleske Description Source Viewed on Sept. 28, 2012 … Photovoltaic Modules in a Desert Climatic Condition by Adam Alfred Suleske A Thesis Presented in Partial Fulfillment of …
Description
Alfred de Musset (1810-1857) is one of the greatest playwrights of the Romantic era. The most attractive fact of his work is the diversity of topics, genres, tones, opinions and styles. Musset's theater was created in the romantic drama period, which was influenced by abroad. He sought freedom of creation and sometimes showed independence from writers taking his own initiatives to change and mix different writing styles. Throughout the different parts of this thesis, I analyzed in detail the dramatic work of Musset, especially through his two plays, Les Caprices de Marianne (1833) and On ne Badine pas avec l'Amour (1834), to study the artistic originality of such an exceptionally talented artist. He lived in the Romantic period but never forgot his predecessors to whom he paid tribute. He was influenced by them while preserving his work's originality. This thesis consists of two chapters, the first is devoted to the Romanticism and its influence on Musset's dramatic work, and the second is about the different literary doctrines that have left their mark on Musset's theater. By studying them, I show how Musset used his talent to mix and match these several types of doctrines to create a unique artwork that is still alive and interesting today.
ContributorsAlavi, Azadeh (Author) / Canovas, Frédéric (Thesis advisor) / Cruse, Markus (Committee member) / Gallais, Sylvain (Committee member) / Arizona State University (Publisher)
Created2011
… de Marianne et On ne badine pas avec l'Amour Description Alfred de Musset (1810-1857) is one of the greatest … Gallais ARIZONA STATE UNIVERSITY December 2011 ABSTRACT Alfred de Musset (1810-1857) is one of the greatest … interesting today. i RÉSUMÉ De toute l’œuvre littéraire d’Alfred de Musset (1810-1857), le théâtre reste aujourd’hui …
Description
This research evaluates a cyber test-bed, DEXTAR (Defense Exercises for Team Awareness Research), and examines the relationship between good and bad team performance in increasingly difficult scenarios. Twenty-one computer science graduate students (seven three-person teams), with experience in cybersecurity, participated in a team-based cyber defense exercise in the context of DEXTAR, a high fidelity cybersecurity testbed. Performance measures were analyzed in addition to team process, team behavior, and workload to examine the relationship between good and bad teams. Lessons learned are reported that will inform the next generation of DEXTAR.
ContributorsBradbury, Aaron (Author) / Cooke, Nancy J. (Thesis advisor) / Branaghan, Russell (Committee member) / Roscoe, Rod (Committee member) / Arizona State University (Publisher)
Created2016
… of DEXTAR. Date Created 2016 Contributors Bradbury, Aaron (Author) Cooke, Nancy J. (Thesis advisor) Branaghan, … Statement of Responsibility by Aaron Bradbury Description Source Viewed on September 8, … Team Cognition: A Team-Based Cybersecurity Simulation by Aaron Bradbury Thesis Presented in Partial Fulfillment of …
Description
Since scholars first turned their attention to the subject some eighty years ago, one major area of contention in the study of Anglo-Saxon wills has been the function of the written will within Anglo-Saxon culture. Verbal agreements, formalized through oral ceremonies and symbolic actions, were recognized as legally binding; however, many of these agreements were also recorded in writing. Many scholars argue that the written document was superfluous;oral ceremonies were written down only in the case of memory failure and the documents themselves had no real performative function. Others see the existence of the written will to be evidence of a shift toward a more textually-dependent culture, reliant on the written as a way of managing society. It is unlikely, however, that the Anglo-Saxons themselves viewed the oral and written in such a binary manner. Rather, the two forms were intermingled, lending potency and performative power to one another. The present study concentrates on two Anglo-Saxon wills in order to demonstrate the ways in which the verbal and written work together in specific texts. By having such a singular focus, a more nuanced understanding of how the oral and written interanimate each other in ninth-century England can be attained. The vernacular will of Alfred, King of the West Saxons from 871-899, and the Latin will of Æðelric, son of Æðelmund (804), are particularly deserving of close attention. While they contain several features that indicate the authority of the voiced statement, they also demonstrate an exceptionally strong sense of the importance of the written. These two wills suggest a dynamic period in which the worlds of the oral ceremony and written word were still intermingled but clearly moving toward a valuing of the written as dispositive.
ContributorsCastle, Kasandra M (Author) / Bjork, Robert (Thesis advisor) / Maring, Heather (Committee member) / Rose, Jonathan (Committee member) / Arizona State University (Publisher)
Created2010
… England can be attained. The vernacular will of Alfred, King of the West Saxons from 871-899, and the Latin … England can be attained. The vernacular will of Alfred, King of the West Saxons from 871-899, and the Latin … APPENDIX A. KING ALFRED’S … a broader set of legal documents from the reign of Alfred to that of Cnut, including law codes, vernacular …
Description
Modified and artificial water sources can be used as a management tool for game and non-game wildlife species. State, federal, and private agencies allocate significant resources to install and maintain artificial water sources (AWS) annually. Capture mark recapture methods were used to sample small mammal communities in the vicinity of five AWS and five paired control sites (treatments) in the surrounding Sonoran desert from October 2011 to May 2012. I measured plant species richness, density, and percent cover in the spring of 2012. A Multi-response Permutation Procedure was used to identify differences in small mammal community abundance, biomass, and species richness by season and treatment. I used Principle Component Analysis to reduce 11 habitat characteristics to five habitat factors. I related rodent occurrence to habitat characteristics using multiple and logistic regression. A total of 370 individual mammals representing three genera and eight species of rodents were captured across 4800 trap nights. Desert pocket mouse (Chaetodipus penicillatus) was the most common species in both seasons and treatments. Whereas rodent community abundance, biomass, and richness were similar between seasons, community variables of AWS were greater than CS. Rodent diversity was similar between treatments. Desert pocket mouse abundance and biomass were twice as high at AWS when compared to controls. Biomass of white-throated woodrat (Neotoma albigula) was five times greater at AWS. Habitat characteristics were similar between treatments. Neither presence of water nor distance to water explained substantial habitat variation. Occurrence of rodent species was associated with habitat characteristics. Desert rodent communities are adapted for arid environments (i.e. Heteromyids) and are not dependent on "free water". Higher abundances of desert pocket mouse at AWS were most likely related to increased disturbance and debris and not the presence of water. The results of this study and previous studies suggest that more investigation is needed and that short term studies may not be able to detect interactions (if any) between AWS and desert small mammal communities.
ContributorsSwitalski, Aaron (Author) / Bateman, Heather L (Thesis advisor) / Miller, William (Committee member) / Alford, Eddie (Committee member) / Arizona State University (Publisher)
Created2013
… communities. Date Created 2013 Contributors Switalski, Aaron (Author) Bateman, Heather L (Thesis advisor) Miller, … Statement of Responsibility by Aaron Switalski Description Source Retrieved on Nov. 15, … of Artificial Water Sources on Small Mammal Communities by Aaron Switalski A Thesis Presented in Partial Fulfillment of …
Description
The indigenous communities of Chiapas, Mexico, have long manifested resistance to oppression and discrimination. This study centers on the analysis of Chiapas: el fin del silencio (1998) by Alberto Turok, connecting the work of the photographer to the problems faced by indigenous people in the region, such as inequality and marginalization. Race, class, gender, and globalization, in addition to the emergence of the Ejército Zapatista de Liberación Nacional (EZLN), are essential factors to the discourse of resistance. EZLN, an armed indigenous group in Chiapas, led by its famed leader, Subcomandante Marcos, clearly opposed the implementation of the North American Free Trade Agreement (NAFTA). In examining resistance, ritual, and performance, the photography of Turok serves as testimony of the struggles of indigenous people and the relevance it has for a diverse Mexican society.
ContributorsArizmendi, Aaron (Author) / Foster, David W (Thesis advisor) / Tompkins, Cynthia (Committee member) / Rosales, Jesus (Committee member) / Arizona State University (Publisher)
Created2012
… Mexican society. Date Created 2012 Contributors Arizmendi, Aaron (Author) Foster, David W (Thesis advisor) Tompkins, … Statement of Responsibility by Aaron Arizmendi Description Source Viewed on Feb. 12, 2013 … y resistencia en la obra fotográfica de Alberto Turok by Aaron Arizmendi A Thesis Presented in Partial Fulfillment of …
Description
Splicing of digital images is a powerful form of tampering which transports regions of an image to create a composite image. When used as an artistic tool, this practice is harmless but when these composite images can be used to create political associations or are submitted as evidence in the judicial system they become more impactful. In these cases, distinction between an authentic image and a tampered image can become important.
Many proposed approaches to image splicing detection follow the model of extracting features from an authentic and tampered dataset and then classifying them using machine learning with the goal of optimizing classification accuracy. This thesis approaches splicing detection from a slightly different perspective by choosing a modern splicing detection framework and examining a variety of preprocessing techniques along with their effect on classification accuracy. Preprocessing techniques explored include Joint Picture Experts Group (JPEG) file type block line blurring, image level blurring, and image level sharpening. Attention is also paid to preprocessing images adaptively based on the amount of higher frequency content they contain.
This thesis also recognizes an identified problem with using a popular tampering evaluation dataset where a mismatch in the number of JPEG processing iterations between the authentic and tampered set creates an unfair statistical bias, leading to higher detection rates. Many modern approaches do not acknowledge this issue but this thesis applies a quality factor equalization technique to reduce this bias. Additionally, this thesis artificially inserts a mismatch in JPEG processing iterations by varying amounts to determine its effect on detection rates.
Many proposed approaches to image splicing detection follow the model of extracting features from an authentic and tampered dataset and then classifying them using machine learning with the goal of optimizing classification accuracy. This thesis approaches splicing detection from a slightly different perspective by choosing a modern splicing detection framework and examining a variety of preprocessing techniques along with their effect on classification accuracy. Preprocessing techniques explored include Joint Picture Experts Group (JPEG) file type block line blurring, image level blurring, and image level sharpening. Attention is also paid to preprocessing images adaptively based on the amount of higher frequency content they contain.
This thesis also recognizes an identified problem with using a popular tampering evaluation dataset where a mismatch in the number of JPEG processing iterations between the authentic and tampered set creates an unfair statistical bias, leading to higher detection rates. Many modern approaches do not acknowledge this issue but this thesis applies a quality factor equalization technique to reduce this bias. Additionally, this thesis artificially inserts a mismatch in JPEG processing iterations by varying amounts to determine its effect on detection rates.
ContributorsGubrud, Aaron (Author) / Li, Baoxin (Thesis advisor) / Candan, Kasim (Committee member) / Kadi, Zafer (Committee member) / Arizona State University (Publisher)
Created2015
… on detection rates. Date Created 2015 Contributors Gubrud, Aaron (Author) Li, Baoxin (Thesis advisor) Candan, Kasim … Statement of Responsibility by Aaron Gubrud Description Source Viewed on June 15, 2015 … on the Identifiability of Digital Image Splicing Forgery by Aaron Gubrud A Thesis Presented in Partial Fulfillment of …
Description
On Android, existing security procedures require apps to request permissions for access to sensitive resources.
Only when the user approves the requested permissions will the app be installed.
However, permissions are an incomplete security mechanism.
In addition to a user's limited understanding of permissions, the mechanism does not account for the possibility that different permissions used together have the ability to be more dangerous than any single permission alone.
Even if users did understand the nature of an app's requested permissions, this mechanism is still not enough to guarantee that a user's information is protected.
Applications can potentially send or receive sensitive information from other applications without the required permissions by using intents.
In other words, applications can potentially collaborate in ways unforeseen by the user, even if the user understands the permissions of each app independently.
In this thesis, we present several graph-based approaches to address these issues.
We determine the permissions of an app and generate scores based on our assigned value of certain resources.
We analyze these scores overall, as well as in the context of the app's category as determined by Google Play.
We show that these scores can be used to identify overzealous apps, as well as apps that do not properly fit within their category.
We analyze potential interactions between different applications using intents, and identify several promiscuous apps with low permission scores, showing that permissions alone are not sufficient to evaluate the security risks of an app.
Our analyses can form the basis of a system to assist users in identifying apps that can potentially compromise user privacy.
Only when the user approves the requested permissions will the app be installed.
However, permissions are an incomplete security mechanism.
In addition to a user's limited understanding of permissions, the mechanism does not account for the possibility that different permissions used together have the ability to be more dangerous than any single permission alone.
Even if users did understand the nature of an app's requested permissions, this mechanism is still not enough to guarantee that a user's information is protected.
Applications can potentially send or receive sensitive information from other applications without the required permissions by using intents.
In other words, applications can potentially collaborate in ways unforeseen by the user, even if the user understands the permissions of each app independently.
In this thesis, we present several graph-based approaches to address these issues.
We determine the permissions of an app and generate scores based on our assigned value of certain resources.
We analyze these scores overall, as well as in the context of the app's category as determined by Google Play.
We show that these scores can be used to identify overzealous apps, as well as apps that do not properly fit within their category.
We analyze potential interactions between different applications using intents, and identify several promiscuous apps with low permission scores, showing that permissions alone are not sufficient to evaluate the security risks of an app.
Our analyses can form the basis of a system to assist users in identifying apps that can potentially compromise user privacy.
ContributorsGibson, Aaron (Author) / Bazzi, Rida (Thesis advisor) / Ahn, Gail-Joon (Committee member) / Walker, Erin (Committee member) / Arizona State University (Publisher)
Created2015
… user privacy. Date Created 2015 Contributors Gibson, Aaron (Author) Bazzi, Rida (Thesis advisor) Ahn, Gail-Joon … Statement of Responsibility by Aaron Gibson Description Source Viewed on July 22, 2015 … apps that can potentially compromise user privacy. … by Aaron Gibson …
Description
Tesla turbo-machinery offers a robust, easily manufactured, extremely versatile prime mover with inherent capabilities making it perhaps the best, if not the only, solution for certain niche applications. The goal of this thesis is not to optimize the performance of the Tesla turbine, but to compare its performance with various working fluids. Theoretical and experimental analyses of a turbine-generator assembly utilizing compressed air, saturated steam and water as the working fluids were performed and are presented in this work. A brief background and explanation of the technology is provided along with potential applications. A theoretical thermodynamic analysis is outlined, resulting in turbine and rotor efficiencies, power outputs and Reynolds numbers calculated for the turbine for various combinations of working fluids and inlet nozzles. The results indicate the turbine is capable of achieving a turbine efficiency of 31.17 ± 3.61% and an estimated rotor efficiency 95 ± 9.32%. These efficiencies are promising considering the numerous losses still present in the current design. Calculation of the Reynolds number provided some capability to determine the flow behavior and how that behavior impacts the performance and efficiency of the Tesla turbine. It was determined that turbulence in the flow is essential to achieving high power outputs and high efficiency. Although the efficiency, after peaking, begins to slightly taper off as the flow becomes increasingly turbulent, the power output maintains a steady linear increase.
ContributorsPeshlakai, Aaron (Author) / Phelan, Patrick (Thesis advisor) / Trimble, Steve (Committee member) / Wang, Liping (Committee member) / Arizona State University (Publisher)
Created2012
… linear increase. Date Created 2012 Contributors Peshlakai, Aaron (Author) Phelan, Patrick (Thesis advisor) Trimble, … Date Sun, 11/30/2014 - 18:24 Statement of Responsibility Aaron Peshlakai Description Source Viewed on Oct. 21, 2013 … the power output maintains a steady linear increase. … Aaron Peshlakai …
Description
The present study investigates the role lexical access plays in the oral fluency of intermediate second language (L2) learners. In order to do this, I utilized a picture-naming task (PNT) in the target language to assess lexical access and generated spontaneous L2 speech through two narration tasks to assess oral fluency. The response times from the PNT were correlated with the two fluency measures analyzed from the narration tasks, the frequency of filled pauses and the overall rate of speech. The results revealed that intermediate learners with faster PNT response times used fewer filled pauses in spontaneous L2 speech but did not reveal a significant relationship between intermediate learners' PNT response times and their rate of speech.
ContributorsCarriere, Aaron S (Author) / Cerron-Palomino, Alvaro (Thesis advisor) / Gradoville, Michael (Committee member) / Beaudrie, Sara (Committee member) / Arizona State University (Publisher)
Created2017
… rate of speech. Date Created 2017 Contributors Carriere, Aaron S (Author) Cerron-Palomino, Alvaro (Thesis advisor) … Statement of Responsibility by Aaron Stanley Carriere Description Source Retrieved on March … learners' PNT response times and their rate of speech. … by Aaron Stanley Carriere …