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- Creators: Arizona State University
Description
As the use of engineered nanomaterials (ENMs) in consumer products becomes more common, the amount of ENMs entering wastewater treatment plants (WWTPs) increases. Investigating the fate of ENMs in WWTPs is critical for risk assessment and pollution control. The objectives of this dissertation were to (1) quantify and characterize titanium (Ti) in full-scale wastewater treatment plants, (2) quantify sorption of different ENMs to wastewater biomass in laboratory-scale batch reactors, (3) evaluate the use of a standard, soluble-pollutant sorption test method for quantifying ENM interaction with wastewater biomass, and (4) develop a mechanistic model of a biological wastewater treatment reactor to serve as the basis for modeling nanomaterial fate in WWTPs. Using titanium (Ti) as a model material for the fate of ENMs in WWTPs, Ti concentrations were measured in 10 municipal WWTPs. Ti concentrations in pant influent ranged from 181 to 3000 µg/L, and more than 96% of Ti was removed, with effluent Ti concentrations being less than 25 µg/L. Ti removed from wastewater accumulated in solids at concentrations ranging from 1 to 6 µg Ti/mg solids. Using transmission electron microscopy, spherical titanium oxide nanoparticles with diameters ranging from 4 to 30 nm were found in WWTP effluents, evidence that some nanoscale particles will pass through WWTPs and enter aquatic systems. Batch experiments were conducted to quantify sorption of different ENM types to activated sludge. Percentages of sorption to 400 mg TSS/L biomass ranged from about 10 to 90%, depending on the ENM material and functionalization. Natural organic matter, surfactants, and proteins had a stabilizing effect on most of the ENMs tested. The United States Environmental Protection Agency's standard sorption testing method (OPPTS 835.1110) used for soluble compounds was found to be inapplicable to ENMs, as freeze-dried activated sludge transforms ENMs into stable particles in suspension. In conjunction with experiments, we created a mechanistic model of the microbiological processes in membrane bioreactors to predict MBR, extended and modified this model to predict the fate of soluble micropollutants, and then discussed how the micropollutant fate model could be used to predict the fate of nanomaterials in wastewater treatment plants.
ContributorsKiser, Mehlika Ayla (Author) / Westerhoff, Paul K (Thesis advisor) / Rittmann, Bruce E. (Committee member) / Hristovski, Kiril D (Committee member) / Arizona State University (Publisher)
Created2011
Description
With the rapid growth of mobile computing and sensor technology, it is now possible to access data from a variety of sources. A big challenge lies in linking sensor based data with social and cognitive variables in humans in real world context. This dissertation explores the relationship between creativity in teamwork, and team members' movement and face-to-face interaction strength in the wild. Using sociometric badges (wearable sensors), electronic Experience Sampling Methods (ESM), the KEYS team creativity assessment instrument, and qualitative methods, three research studies were conducted in academic and industry R&D; labs. Sociometric badges captured movement of team members and face-to-face interaction between team members. KEYS scale was implemented using ESM for self-rated creativity and expert-coded creativity assessment. Activities (movement and face-to-face interaction) and creativity of one five member and two seven member teams were tracked for twenty five days, eleven days, and fifteen days respectively. Day wise values of movement and face-to-face interaction for participants were mean split categorized as creative and non-creative using self- rated creativity measure and expert-coded creativity measure. Paired-samples t-tests [t(36) = 3.132, p < 0.005; t(23) = 6.49 , p < 0.001] confirmed that average daily movement energy during creative days (M = 1.31, SD = 0.04; M = 1.37, SD = 0.07) was significantly greater than the average daily movement of non-creative days (M = 1.29, SD = 0.03; M = 1.24, SD = 0.09). The eta squared statistic (0.21; 0.36) indicated a large effect size. A paired-samples t-test also confirmed that face-to-face interaction tie strength of team members during creative days (M = 2.69, SD = 4.01) is significantly greater [t(41) = 2.36, p < 0.01] than the average face-to-face interaction tie strength of team members for non-creative days (M = 0.9, SD = 2.1). The eta squared statistic (0.11) indicated a large effect size. The combined approach of principal component analysis (PCA) and linear discriminant analysis (LDA) conducted on movement and face-to-face interaction data predicted creativity with 87.5% and 91% accuracy respectively. This work advances creativity research and provides a foundation for sensor based real-time creativity support tools for teams.
ContributorsTripathi, Priyamvada (Author) / Burleson, Winslow (Thesis advisor) / Liu, Huan (Committee member) / VanLehn, Kurt (Committee member) / Pentland, Alex (Committee member) / Arizona State University (Publisher)
Created2011
Description
MOVE was a choreographic project that investigated content in conjunction with the creative process. The yearlong collaborative creative process utilized improvisational and compositional experiments to research the movement potential of the human body, as well as movement's ability to be an emotional catalyst. Multiple showings were held to receive feedback from a variety of viewers. Production elements were designed in conjunction with the development of the evening-length dance work. As a result of discussion and research, several process-revealing sections were created to provide clear relationships between pedestrian/daily functional movement and technical movement. Each section within MOVE addressed movement as an emotional catalyst, resulting in a variety of emotional textures. The sections were placed in a non-linear structure in order for the audience to have the space to create their own connections between concepts. Community was developed in rehearsal via touch/weight sharing, and translated to the performance of MOVE via a communal, instinctive approach to the performance of the work. Community was also created between the movers and the audience via the design of the performance space. The production elements all revolved around the human body, and offered different viewpoints into various body parts. The choreographer, designers, and movers all participated in the creation of the production elements, resulting in a clear understanding of MOVE by the entire community involved. The overall creation, presentation, and reflection of MOVE was a view into the choreographer's growth as a dance artist, and her values of people and movement.
ContributorsPeterson, Britta Joy (Author) / Fitzgerald, Mary (Thesis advisor) / Schupp, Karen (Committee member) / Mcneal Hunt, Diane (Committee member) / Arizona State University (Publisher)
Created2013
Description
The Santa Cruz River, in southern Arizona, receives steady inputs of nutrient-enriched treated wastewater (effluent). Previous studies have documented reduced infiltration of surface water in the river. This disruption of hydrologic connectivity, or clogging, can have consequences for groundwater recharge, flows of wastewater in unwanted locations, and potentially even survivorship of floodplain riparian vegetation. Clogging can result from biotic processes (microbial or algal growth), abiotic processes (siltation of interstitial spaces), or both. Little is known about clogging in rivers and the environmental factors that regulate their dynamics, so natural field experiments along the Santa Cruz and San Pedro Rivers were used to answer: 1) Are there spatial patterns of hydraulic conductivity in the riverbed downstream from the effluent point-source? 2) Is there temporal variability in hydraulic conductivity and microbial abundance associated with flooding? 3) Are there environmental variables, such as nutrients or stream flow, related to differences in hydraulic conductivity and microbial abundance? To address these questions, a series of sites at increasing distance from two municipal effluent discharge points with differing water quality were selected on the Santa Cruz River and compared with non-effluent control reaches of the San Pedro River. Physical, chemical, and biological parameters were monitored over one year to capture seasonal changes and flood cycles.
ContributorsCase, Natalie (Author) / Stromberg, Juliet (Thesis advisor) / Rock, Channah (Committee member) / Meixner, Thomas (Committee member) / Arizona State University (Publisher)
Created2012
Description
This dissertation examines songs, sticks, and stories pertaining to Tohono O'odham pilgrimages to Magdalena, Sonora, Mexico, the home of their patron saint, Saint Francis. In the sense that Tohono O'odham travel to Magdalena in order to sustain their vital and long-standing relationship with their saint, these journeys may be understood as a Christian pilgrimages. However, insofar as one understands this indigenous practice as a Christian pilgrimage, it must also be noted that Tohono O'odham have made Christianity their own. The findings show that Tohono O'odham have embedded, or emplaced, Christianity within their ancestral landscapes, and that they have done so in a variety of ways through songs, staffs, and stories. This work emphasizes connections between O'odham processes of producing places and persons. Songs associated with the journey to Magdalena, which contain both geographical and historical knowledge, foreground the significance of place and the movements of various persons at the places mentioned within them. The staffs of O'odham walkers, like other sticks, similarly contain both geographical and historical knowledge, evoking memories of past journeys in the present and the presence of Magdalena. Staffs are also spoken of and treated as persons, or at least as an extension of O'odham walkers. O'odham stories of good and bad walkers illustrate contested O'odham ideologies of socially sanctioned movements. Finally, this dissertation concludes by demonstrating some of the ways in which O'odham senses of their own history diverge from academic models of Tohono O'odham history and the history of Christianity in the Americas.
ContributorsSchermerhorn, Seth (Author) / Swanson, Tod D (Thesis advisor) / Brown, Eddie F. (Committee member) / Feldhaus, Anne (Committee member) / Arizona State University (Publisher)
Created2013
Description
The intention for the dance production Story was to develop and explore a collaborative creative process to communicate a specific narrative to an audience. The production took place in the Margaret Gisolo Dance Studio at Arizona State University on November 18, 19, and 20, 2011. The purpose of my thesis work was to investigate how my personal inspiration from classical ballet, balletic movement vocabulary, fantasy narrative (an imaginative fictional story), supportive lighting, set, costumes and expressive sound might merge within a collaborative dance-making process. The final choreography includes creative input from the participating dancers and designers, as well as constructive feedback from my thesis committee. My reflection on the creative process for Story describes the challenges and personal growth I experienced as a result of the project.
ContributorsAllen, Karryn (Author) / Dyer, Becky (Thesis advisor) / Murphey, Claudia (Committee member) / Gharavi, Lance (Committee member) / Piver, Harper (Committee member) / Arizona State University (Publisher)
Created2012
Description
Using models identified by communications scholars Herbert W. Simons and Charles J. Stewart, a rhetorical analysis was conducted on contemporary Tea Party Movement (TPM) artifacts in an attempt to gauge the movement's authenticity as it relates to grassroots advocacy versus astroturfing. The models provided a theoretical framework in which the functions of social movement leaders were analyzed, as well as the rhetorical phases of a movement. Additionally, the notions of advocacy and astroturfing were defined and the concepts compared and contrasted. Used in conjunction with one another the models provided a framework in which TPM artifacts could be analyzed. Analysis was conducted on the websites for the Tea Party Patriots and Tea Party Express, a one-month sample of Sarah Palin FaceBook posts, two speeches delivered by Michelle Bachmann, and finally one speech given by Palin. Examples for each of the necessary rhetorical components identified were found within TPM sources, thus leading to the conclusion that the TPM operates primarily as a grassroots advocacy movement.
ContributorsZukowski, Kassandra (Author) / Holmer Nadesan, Majia (Thesis advisor) / Mean, Lindsey (Committee member) / Eric Ramsey, Ramsey (Committee member) / Arizona State University (Publisher)
Created2011
Description
Research in fulfillment of the degree of Doctor of Musical Arts in performance has included CD recording projects, commissions of new pieces, as well as papers on existing pieces that push the performer beyond traditional playing by incorporating extended techniques, multimedia, technology, or movement. This study attempts to synthesize these ideas by commissioning a new work for clarinet and electronics that can be performed alone, combined with movement, or with an interactive video accompaniment. Primary work for this project has been the audio recording, music video, and live dance performance of the new work, entitled Agents of Espionage, which can be viewed at: http://www.youtube.com/watch?v=SAZ20kCb0Qg or http://www.youtube.com/watch?v=94- C7wWTeKs&context;=C4063fdcADvjVQa1PpcFPv1fBtuWcqgV638q_BRacH7 XWR-xy1B7A=. The entirety of the project, including creating the music, video, audio recordings, and dance was completed on a limited budget of under $500USD, using all student performers and creators. The accompanying written document outlines the various steps for completing each portion of the project, interviews with the artists involved, including Zachary Bramble, composer; Jason Mills, videographer; and Jacquelyn Achord, choreographer; and an analysis of the music from the performer's perspective. This paper should convey ideas about how future undertakings of this sort are possible. This work has been greatly inspired by Martin Fröst and his collaboration with Fredrik Hogberg on the piece The Invisible Duet.
ContributorsViliunas, Brian Bodo (Author) / Spring, Robert (Thesis advisor) / Hill, Gary (Committee member) / Marshall, Kimberly (Committee member) / Schuring, Martin (Committee member) / Rogers, Rodney (Committee member) / Gardner, Joshua (Committee member) / Arizona State University (Publisher)
Created2012
Description
The purpose of this dissertation was to document the teaching practices and underlying intentions of teachers in a Waldorf early childhood program in relationship to integrative movement and its connections to learning for the kindergarten through grade three learner. Current concerns about unhealthy sedentary lifestyles and the decreasing emphasis on physical activity/movement in public schools are growing. This dissertation explores current educational research related to the effects of movement on cognitive processing and the potential effects of movement on learning, particularly in a Waldorf-based early childhood program in which movement is integrated into all aspects of learning (including all academic subjects). This dissertation includes a literature review of current research and theory, and a qualitative micro-ethnographic case study of a Waldorf-based early childhood program that involved teacher observations and interviews. Key findings: the Waldorf-based early childhood program provided practical methods for (1) encouraging various modes of free play intended to enhance a child's physical, social/emotional and academic development, (2) integrating teacher-led movements into the daily curriculum, (3) utilizing movement to aid cognitive processing and prepare students for more sedentary academic work, (4) integrating remedial work into the daily classroom curriculum, and (5) utilizing intentional movement to help a child learn to embody stillness as a means of focusing attention and energy. Movements integrated into the curriculum by the teachers created observable positive effects on the students: eagerness to participate, recall, extending focus and attention, and creating social awareness and cooperation. Conclusions: (1) Waldorf-based education programs may provide practical examples and theoretical perspectives relevant to the creation of an integrated and comprehensive movement-based curriculum for the early childhood learner, and (2) The Waldorf teachers studied provide a counter-position to early childhood teaching practices that utilize movement as a break from sedentary learning. This study revealed the effects of imposing or integrating stillness into a movement-rich curriculum. Future recommendations include more comprehensive research on Waldorf-based educational programs and educational research that reaches beyond movement's potential positive or negative effect on a student's academic progress to study in more depth how and why movement impacts learning for the young child.
ContributorsDarian, Andrew (Author) / Surbeck, Elaine (Thesis advisor) / Swadener, Elizabeth (Committee member) / Christie, James (Committee member) / Arizona State University (Publisher)
Created2012
Description
Corrosion is known to have severe infrastructure integrity implications in a broad range of industries including water and wastewater treatment and reclamation. In the U.S. alone, the total losses due to corrosion in drinking water and wastewater systems can account for economic losses as high as $80 billion dollars a year. Microbially induced corrosion is a complex phenomenon which involve various phases; 1) formation of biofilms on submerged surfaces, 2) creation of micro-environmental niches associated with biofilm growth, 3) altered availability nutrients, 4) changes in the pH and oxygen concentrations. Biofilms can harbor opportunistic or pathogenic bacteria for a long time increasing the risk of pathogen exposure for the end users. The focus of this thesis research was to study the kinetics of microbially induced corrosion of various materials in water and reclaimed water systems. The specific objective was to assess the biofilms formation potential on stainless steel 304, stainless steel 316, galvanized steel, copper, cPVC, glass, carbon steel, and cast iron in water and reclaimed water systems. Experiments were conducted using bioreactor containers, each bioreactor housed four sampling boxes with eight partitions, dedicated to each material type coupon. One bioreactor was stationed at ASU, and one at Vistancia Aquifer Storage and Recovery (ASR) well; while three bioreactors were stationed at Butler facility, at pre-disinfection, post-UV and post-chlorination. From each location, one submerged sampling box was retrieved after 1, 3, 6 and 12 months. Time series of biofilm samples recovered from various types of coupons from different locations were analyzed using physical and culture-based techniques for quantification of biofilms and detection of heterotrophic plate count (HPC) bacteria, Legionella, Mycobacterium, and sulfate reducing bacteria (SRB).
After one-year, galvanized steel had the highest concentration of HPC at 4.27 logs while copper had the lowest concentration of 3.08 logs of HPC. Bacterial growth data collected from the SRB tests was compiled to develop a numerical matrix using growth potential, biofilm formation potential and metal reduction potential of SRB isolates. This risk assessment matrix can be a useful tool for the water industry to evaluate the potential risk of MIC in their systems.
ContributorsNeal, Amber (Author) / Abbaszadegan, Morteza (Thesis advisor) / Fox, Peter (Committee member) / Alum, Absar (Committee member) / Arizona State University (Publisher)
Created2022