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- Genre: Doctoral Dissertation
Description
An ongoing effort in the photovoltaic (PV) industry is to reduce the major manufacturing cost components of solar cells, the great majority of which are based on crystalline silicon (c-Si). This includes the substitution of screenprinted silver (Ag) cell contacts with alternative copper (Cu)-based contacts, usually applied with plating. Plated Cu contact schemes have been under study for many years with only minor traction in industrial production. One of the more commonly-cited barriers to the adoption of Cu-based contacts for photovoltaics is long-term reliability, as Cu is a significant contaminant in c-Si, forming precipitates that degrade performance via degradation of diode character and reduction of minority carrier lifetime. Cu contamination from contacts might cause degradation during field deployment if Cu is able to ingress into c-Si. Furthermore, Cu contamination is also known to cause a form of light-induced degradation (LID) which further degrades carrier lifetime when cells are exposed to light.
Prior literature on Cu-contact reliability tended to focus on accelerated testing at the cell and wafer level that may not be entirely replicative of real-world environmental stresses in PV modules. This thesis is aimed at advancing the understanding of Cu-contact reliability from the perspective of quasi-commercial modules under more realistic stresses. In this thesis, c-Si solar cells with Cu-plated contacts are fabricated, made into PV modules, and subjected to environmental stress in an attempt to induce hypothesized failure modes and understand any new vulnerabilities that Cu contacts might introduce. In particular, damp heat stress is applied to conventional, p-type c-Si modules and high efficiency, n-type c-Si heterojunction modules. I present evidence of Cu-induced diode degradation that also depends on PV module materials, as well as degradation unrelated to Cu, and in either case suggest engineering solutions to the observed degradation. In a forensic search for degradation mechanisms, I present novel evidence of Cu outdiffusion from contact layers and encapsulant-driven contact corrosion as potential key factors. Finally, outdoor exposures to light uncover peculiarities in Cu-plated samples, but do not point to especially serious vulnerabilities.
Prior literature on Cu-contact reliability tended to focus on accelerated testing at the cell and wafer level that may not be entirely replicative of real-world environmental stresses in PV modules. This thesis is aimed at advancing the understanding of Cu-contact reliability from the perspective of quasi-commercial modules under more realistic stresses. In this thesis, c-Si solar cells with Cu-plated contacts are fabricated, made into PV modules, and subjected to environmental stress in an attempt to induce hypothesized failure modes and understand any new vulnerabilities that Cu contacts might introduce. In particular, damp heat stress is applied to conventional, p-type c-Si modules and high efficiency, n-type c-Si heterojunction modules. I present evidence of Cu-induced diode degradation that also depends on PV module materials, as well as degradation unrelated to Cu, and in either case suggest engineering solutions to the observed degradation. In a forensic search for degradation mechanisms, I present novel evidence of Cu outdiffusion from contact layers and encapsulant-driven contact corrosion as potential key factors. Finally, outdoor exposures to light uncover peculiarities in Cu-plated samples, but do not point to especially serious vulnerabilities.
ContributorsKaras, Joseph (Author) / Bowden, Stuart (Thesis advisor) / Alford, Terry (Thesis advisor) / Tamizhmani, Govindasamy (Committee member) / Michaelson, Lynne (Committee member) / Arizona State University (Publisher)
Created2020
Description
There are increasing demands for gas sensors in air quality and human health monitoring applications. The qualifying sensor technology must be highly sensitive towards ppb level gases of interest, such as acetylene (C2H2), hydrogen sulfide (H2S), and volatile organic compounds. Among the commercially available sensor technologies, conductometric gas sensors with nanoparticles of oxide semiconductors as sensing materials hold significant advantages in cost, size, and cross-compatibility. However, semiconductor gas sensors must overcome some major challenges in thermal stability, sensitivity, humidity interference, and selectivity before potential widespread adoption in air quality and human health monitoring applications.
The focus of this dissertation is to tackle these issues by optimizing the composition and the morphology of the nanoparticles, and by innovating the structure of the sensing film assembled with the nanoparticles. From the nanoparticles perspective, the thermal stability of tin oxide nanoparticles with different Al dopant concentrations was studied, and the results indicate that within certain range of doping concentration, the dopants segregated at the grain surface can improve the thermal stability by stabilizing the grain boundaries.
From the sensing film perspective, a novel self-assembly approach was developed for copper oxide nanosheets and the sensor response towards H2S gas was revealed to decrease monotonically by more than 60% as the number of layers increase from 1 to 300 (thickness: 0.03-10 μm). Moreover, a sensing mechanism study on the humidity influence on H2S detection was performed to gain more understandings of the role of the hydroxyl group in the surface reaction, and humidity independent response was observed in the monolayer film at 325 ℃. With a more precise deposition tool (Langmuir-Blodgett trough), monolayer film of zinc oxide nanowires sensitized with gold catalyst was prepared, and highly sensitive and specific response to C2H2 in the ppb range was observed. Furthermore, the effect of surface topography of the monolayer film on stabilizing noble metal catalyst, and the sensitization mechanism of gold were investigated.
Lastly, a semiconductor sensor array was developed to analyze the composition of gases dissolved in transformer oil to demonstrate the industrial application of this sensor technology.
The focus of this dissertation is to tackle these issues by optimizing the composition and the morphology of the nanoparticles, and by innovating the structure of the sensing film assembled with the nanoparticles. From the nanoparticles perspective, the thermal stability of tin oxide nanoparticles with different Al dopant concentrations was studied, and the results indicate that within certain range of doping concentration, the dopants segregated at the grain surface can improve the thermal stability by stabilizing the grain boundaries.
From the sensing film perspective, a novel self-assembly approach was developed for copper oxide nanosheets and the sensor response towards H2S gas was revealed to decrease monotonically by more than 60% as the number of layers increase from 1 to 300 (thickness: 0.03-10 μm). Moreover, a sensing mechanism study on the humidity influence on H2S detection was performed to gain more understandings of the role of the hydroxyl group in the surface reaction, and humidity independent response was observed in the monolayer film at 325 ℃. With a more precise deposition tool (Langmuir-Blodgett trough), monolayer film of zinc oxide nanowires sensitized with gold catalyst was prepared, and highly sensitive and specific response to C2H2 in the ppb range was observed. Furthermore, the effect of surface topography of the monolayer film on stabilizing noble metal catalyst, and the sensitization mechanism of gold were investigated.
Lastly, a semiconductor sensor array was developed to analyze the composition of gases dissolved in transformer oil to demonstrate the industrial application of this sensor technology.
ContributorsMiao, Jiansong (Author) / Lin, Jerry Y.S. (Thesis advisor) / Forzani, Erica (Committee member) / Liu, Jingyue (Committee member) / Li, Jian (Committee member) / Arizona State University (Publisher)
Created2020
Description
Perovskite solar cells are the next generation organic-inorganic hybrid technology and have achieved remarkable efficiencies comparable to Si-based conventional solar cells. Since their inception in 2009 with an efficiency of 3.9%, they have improved tremendously over the past decade and recently demonstrated 25.2% efficiency for single-junction devices. There are a few hurdles, however, that prevent this technology from realizing their full potential, such as stability and toxicity of the perovskites. Apart from solution processing in the fabrication of perovskites, precursor composition plays a major role in determining the quality of the thin film and its general properties. This work studies novel approaches for improving the efficiency and stability of the perovskite solar cells with minimized toxicity. The effect of excess Pb on photo-degradation in MAPbI3 perovskites in an inverted device architecture was studied with a focus on improving stability and efficiency. Precursor concentration with 5% excess Pb was found to be optimal for better efficiency and stability against photo-degradation. Further improvements in efficiency were made possible through the addition of Zirconium Acetylacetonate as a secondary electron buffer layer. A concentration of 1.5mg/ml was found to be optimal for demonstrating better efficiency and stability. Partial substitution of Pb with non-toxic Sr was also studied for improving the stability of inverted devices. Using acetate-derived precursors, 10% Sr was introduced into perovskites for improvements to the stability of the device.
In another study, triple-cation perovskites with FAMACs cations were studied with doping different amounts of Phenyl Ethyl Ammonium (PEA) to induce a quasi 2D-3D structure for improved moisture stability. Doping the perovskite with 1.67% PEA was found to be best for improved morphology with fewer pinholes, which further resulted in better VOC and stability. A passivation effect for triple-cation perovskites was further proposed with the addition of a Guanidinium Iodide layer on the perovskite. Concentrations of 1mg/ml and 2mg/ml were demonstrated to be best for reducing defects and trap states and increasing the overall stability of the device.
In another study, triple-cation perovskites with FAMACs cations were studied with doping different amounts of Phenyl Ethyl Ammonium (PEA) to induce a quasi 2D-3D structure for improved moisture stability. Doping the perovskite with 1.67% PEA was found to be best for improved morphology with fewer pinholes, which further resulted in better VOC and stability. A passivation effect for triple-cation perovskites was further proposed with the addition of a Guanidinium Iodide layer on the perovskite. Concentrations of 1mg/ml and 2mg/ml were demonstrated to be best for reducing defects and trap states and increasing the overall stability of the device.
ContributorsYerramilli, Aditya (Author) / Alford, Terry (Thesis advisor) / Theodore, David (Committee member) / Chen, Yuanqing (Committee member) / Arizona State University (Publisher)
Created2020
Description
Single-layer pentagonal materials have received limited attention compared with their counterparts with hexagonal structures. They are two-dimensional (2D) materials with pentagonal structures, that exhibit novel electronic, optical, or magnetic properties. There are 15 types of pentagonal tessellations which allow plenty of options for constructing 2D pentagonal lattices. Few of them have been explored theoretically or experimentally. Studying this new type of 2D materials with density functional theory (DFT) will inspire the discovery of new 2D materials and open up applications of these materials in electronic and magnetic devices.In this dissertation, DFT is applied to discover novel 2D materials with pentagonal structures. Firstly, I examine the possibility of forming a 2D nanosheet with the vertices of type 15 pentagons occupied by boron, silicon, phosphorous, sulfur, gallium, germanium or tin atoms. I obtain different rearranged structures such as a single-layer gallium sheet with triangular patterns. Then the exploration expands to other 14 types of pentagons, leading to the discoveries of carbon nanosheets with Cairo tessellation (type 2/4 pentagons) and other patterns. The resulting 2D structures exhibit diverse electrical properties. Then I reveal the hidden Cairo tessellations in the pyrite structures and discover a family of planar 2D materials (such as PtP2), with a chemical formula of AB2 and space group pa ̄3. The combination of DFT and geometries opens up a novel route for the discovery of new 2D materials. Following this path, a series of 2D pentagonal materials such as 2D CoS2 are revealed with promising electronic and magnetic applications. Specifically, the DFT calculations show that CoS2 is an antiferromagnetic semiconductor with a band gap of 2.24 eV, and a N ́eel temperature of about 20 K. In order to enhance the superexchange interactions between the ions in this binary compound, I explore the ternary 2D pentagonal material CoAsS, that lacks the inversion symmetry. I find out CoAsS exhibits a higher Curie temperature of 95 K and a sizable piezoelectricity (d11=-3.52 pm/V). In addition to CoAsS, 34 ternary 2D pentagonal materials are discovered, among which I focus on FeAsS, that is a semiconductor showing strong magnetocrystalline anisotropy and sizable Berry curvature. Its magnetocrystalline anisotropy energy is 440 μeV/Fe ion, higher than many other 2D magnets that have been found.
Overall, this work not only provides insights into the structure-property relationship of 2D pentagonal materials and opens up a new route of studying 2D materials by combining geometry and computational materials science, but also shows the potential applications of 2D pentagonal materials in electronic and magnetic devices.
Overall, this work not only provides insights into the structure-property relationship of 2D pentagonal materials and opens up a new route of studying 2D materials by combining geometry and computational materials science, but also shows the potential applications of 2D pentagonal materials in electronic and magnetic devices.
ContributorsLiu, Lei (Author) / Zhuang, Houlong (Thesis advisor) / Singh, Arunima (Committee member) / Jiao, Yang (Committee member) / Arizona State University (Publisher)
Created2020
Description
Energy return in footwear is associated with the damping behavior of midsole foams, which stems from the combination of cellular structure and polymeric material behavior. Recently, traditional ethyl vinyl acetate (EVA) foams have been replaced by BOOST(TM) foams, thereby reducing the energetic cost of running. These are bead foams made from expanded thermoplastic polyurethane (eTPU), which have a multi-scale structure consisting of fused porous beads, at the meso-scale, and thousands of small closed cells within the beads at the micro-scale. Existing predictive models coarsely describe the macroscopic behavior but do not take into account strain localizations and microstructural heterogeneities. Thus, enhancement in material performance and optimization requires a comprehensive understanding of the foam’s cellular structure at all length scales and its influence on mechanical response.
This dissertation focused on characterization and deformation behavior of eTPU bead foams with a unique graded cell structure at the micro and meso-scale. The evolution of the foam structure during compression was studied using a combination of in situ lab scale and synchrotron x-ray tomography using a four-dimensional (4D, deformation + time) approach. A digital volume correlation (DVC) method was developed to elucidate the role of cell structure on local deformation mechanisms. The overall mechanical response was also studied ex situ to probe the effect of cell size distribution on the force-deflection behavior. The radial variation in porosity and ligament thickness profoundly influenced the global mechanical behavior. The correlation of changes in void size and shape helped in identifying potentially weak regions in the microstructure. Strain maps showed the initiation of failure in cell structure and it was found to be influenced by the heterogeneities around the immediate neighbors in a cluster of voids. Poisson’s ratio evaluated from DVC was related to the microstructure of the bead foams. The 4D approach taken here provided an in depth and mechanistic understanding of the material behavior, both at the bead and plate levels, that will be invaluable in designing the next generation of high-performance footwear.
This dissertation focused on characterization and deformation behavior of eTPU bead foams with a unique graded cell structure at the micro and meso-scale. The evolution of the foam structure during compression was studied using a combination of in situ lab scale and synchrotron x-ray tomography using a four-dimensional (4D, deformation + time) approach. A digital volume correlation (DVC) method was developed to elucidate the role of cell structure on local deformation mechanisms. The overall mechanical response was also studied ex situ to probe the effect of cell size distribution on the force-deflection behavior. The radial variation in porosity and ligament thickness profoundly influenced the global mechanical behavior. The correlation of changes in void size and shape helped in identifying potentially weak regions in the microstructure. Strain maps showed the initiation of failure in cell structure and it was found to be influenced by the heterogeneities around the immediate neighbors in a cluster of voids. Poisson’s ratio evaluated from DVC was related to the microstructure of the bead foams. The 4D approach taken here provided an in depth and mechanistic understanding of the material behavior, both at the bead and plate levels, that will be invaluable in designing the next generation of high-performance footwear.
ContributorsSundaram Singaravelu, Arun Sundar (Author) / Chawla, Nikhilesh (Thesis advisor) / Emady, Heather (Committee member) / Jiao, Yang (Committee member) / Arizona State University (Publisher)
Created2020
Description
Universities and colleges in the United States (U.S.) are in a period of rapid transformation. Driven by the need for an educated workforce, higher education institutions are responding to rapid innovation, globalization, economic realities, and sociodemographic shifts. Simultaneously, extensive educational online networks connect millions of people worldwide enable learning and knowledge sharing beyond what society has experienced to date. In light of technological advancements, the preservation and presentation of certain ideals that undergird academia and the communication and application of knowledge are undergoing dramatic change. Within higher education, this is both a challenge and an opportunity to re-envision the commitment to educate the public. This research discusses potential forms of this redesign and how it can build upon and depart from previous iterations of higher education. How colleges and universities will adapt to become more relevant, engaging, and accessible is a pressing question that must be addressed.
Using case studies focused on creating sustainability education materials, this dissertation develops knowledge related to three interconnected areas of study that will contribute to redesigning higher education through participatory action research methodology. First, higher education has a civic responsibility to provide new ways of thinking, being, and doing globally and providing more access to education to broader society, especially through public research institutions. Second, with a vast array of available learning materials, higher education should invest in elegantly-designed experiences consisting of well-reasoned, meticulously-curated, and high-quality content that is aesthetically appealing, engaging, and accessible to a broad audience. Third, as universities transition from the gatekeepers of knowledge to the connectors of knowledge, they also need to ensure that a coherent mission is articulated and invested in by stakeholders to create an intentionally beneficial transformational effort. The transformation of higher education toward a more inclusive learning environment through new ways of thinking and elegantly-designed learning experiences will serve to improve our learning institutions. As part of the necessary core for an educated democracy, higher education institutions must strive to create a more equitable, inclusive, and diverse society.
Using case studies focused on creating sustainability education materials, this dissertation develops knowledge related to three interconnected areas of study that will contribute to redesigning higher education through participatory action research methodology. First, higher education has a civic responsibility to provide new ways of thinking, being, and doing globally and providing more access to education to broader society, especially through public research institutions. Second, with a vast array of available learning materials, higher education should invest in elegantly-designed experiences consisting of well-reasoned, meticulously-curated, and high-quality content that is aesthetically appealing, engaging, and accessible to a broad audience. Third, as universities transition from the gatekeepers of knowledge to the connectors of knowledge, they also need to ensure that a coherent mission is articulated and invested in by stakeholders to create an intentionally beneficial transformational effort. The transformation of higher education toward a more inclusive learning environment through new ways of thinking and elegantly-designed learning experiences will serve to improve our learning institutions. As part of the necessary core for an educated democracy, higher education institutions must strive to create a more equitable, inclusive, and diverse society.
ContributorsHale, Anne Elizabeth (Author) / Archambault, Leanna (Thesis advisor) / Johnston, Erik W., 1977- (Thesis advisor) / Richter, Jennifer (Committee member) / Arizona State University (Publisher)
Created2020
Description
Deformable heat exchangers could provide a multitude of previously untapped advantages ranging from adaptable performance via macroscale, dynamic shape change (akin to dilation/constriction seen in blood vessels) to enhanced heat transfer at thermal interfaces through microscale, surface deformations. So far, making deformable, ‘soft heat exchangers’ (SHXs) has been limited by the low thermal conductivity of materials with suitable mechanical properties. The recent introduction of liquid-metal embedded elastomers by Bartlett et al1 has addressed this need. Specifically, by remaining soft and stretchable despite the addition of filler, these thermally conductive composites provide an ideal material for the new class of “soft thermal systems”, which is introduced in this work. Understanding such thermal systems will be a key element in enabling technology that require high levels of stretchability, such as thermoregulatory garments, soft electronics, wearable electronics, and high-powered robotics. Shape change inherent to SHX operation has the potential to violate many conventional assumptions used in HX design and thus requires the development of new theoretical approaches to predict performance. To create a basis for understanding these devices, this work highlights two sequential studies. First, the effects of transitioning to a surface deformable, SHX under steady state static conditions in the setting of a liquid cooling device for thermoregulation, electronics and robotics applications was explored. In this study, a thermomechanical model was built and validated to predict the thermal performance and a system wide analysis to optimize such devices was carried out. Second, from a more fundamental perspective, the effects of SHXs undergoing transient shape deformation during operation was explored. A phase shift phenomenon in cooling performance dependent on stretch rate, stretch extent and thermal diffusivity was discovered and explained. With the use of a time scale analysis, the extent of quasi-static assumption viability in modeling such systems was quantified and multiple shape modulation regime limits were defined. Finally, nuance considerations and future work of using liquid metal-silicone composites in SHXs were discussed.
ContributorsKotagama, Praveen (Author) / Rykaczewski, Konrad (Thesis advisor) / Wang, Robert (Committee member) / Phelan, Patrick (Committee member) / Herrmann, Marcus (Committee member) / Green, Matthew (Committee member) / Arizona State University (Publisher)
Created2020
Description
Predominant sustainability pedagogy and science largely focus on fixing existingproblems via solutions external to humans (e.g. carbon sequestration, renewable energy).
While external or outer interventions can support a transition to a sustainable future,
internal or inner developments should also be highly valued. For this dissertation, I define
sustainability as the ability of any individual, community or country to meet their needs
and live happily without compromising the ability of other individuals, communities,
countries and future generations to meet their needs and live happily. Framed this way, a
sustainable and happy life should focus on both outer and inner development, the latter
largely unconsidered in sustainability science and scholarship.
I propose that emphasizing spiritual wellbeing and spiritual practices can support
individuals and communities to act with mindfulness, awareness, compassion,
connection, and love, transitioning to a more sustainable existence. This dissertation
consists of three studies: (1) the development of a theoretical framework identifying
spirituality as the missing link between sustainability and happiness, (2) an empirical
pilot study testing the theoretical framework via contemplative practices in a
sustainability classroom, and (3) an autoethnography exploring my inner development
and transformation as a sustainability and spirituality researcher over the past four years.
The theoretical framework found and posits, based on existing literature, that
spirituality indeed may be the missing link between an unsustainable existence and a
sustainably and happy future. Results from the empirical study suggest that a focus on
spirituality leads students to develop inner traits necessary for sustainable behavior and a
deeper understanding of sustainability. My autoethnography demonstrates the spiritual
ii
transformation possible from integrating spiritual well-being and intellect, while striving
to embody sustainability as a spiritual journey. My research supports further studies and a
greater understanding of the importance of spiritual well-being to sustainability and the
incorporation of contemplative practices in sustainability classrooms. Finally, I hope this
dissertation will (1) inspire sustainability scientists, researchers, and students to integrate
spiritual well-being as an important part of their lives and work, and (2) encourage deeper
conversations about the radical inner shift we need to achieve lasting sustainability for all
beings.
While external or outer interventions can support a transition to a sustainable future,
internal or inner developments should also be highly valued. For this dissertation, I define
sustainability as the ability of any individual, community or country to meet their needs
and live happily without compromising the ability of other individuals, communities,
countries and future generations to meet their needs and live happily. Framed this way, a
sustainable and happy life should focus on both outer and inner development, the latter
largely unconsidered in sustainability science and scholarship.
I propose that emphasizing spiritual wellbeing and spiritual practices can support
individuals and communities to act with mindfulness, awareness, compassion,
connection, and love, transitioning to a more sustainable existence. This dissertation
consists of three studies: (1) the development of a theoretical framework identifying
spirituality as the missing link between sustainability and happiness, (2) an empirical
pilot study testing the theoretical framework via contemplative practices in a
sustainability classroom, and (3) an autoethnography exploring my inner development
and transformation as a sustainability and spirituality researcher over the past four years.
The theoretical framework found and posits, based on existing literature, that
spirituality indeed may be the missing link between an unsustainable existence and a
sustainably and happy future. Results from the empirical study suggest that a focus on
spirituality leads students to develop inner traits necessary for sustainable behavior and a
deeper understanding of sustainability. My autoethnography demonstrates the spiritual
ii
transformation possible from integrating spiritual well-being and intellect, while striving
to embody sustainability as a spiritual journey. My research supports further studies and a
greater understanding of the importance of spiritual well-being to sustainability and the
incorporation of contemplative practices in sustainability classrooms. Finally, I hope this
dissertation will (1) inspire sustainability scientists, researchers, and students to integrate
spiritual well-being as an important part of their lives and work, and (2) encourage deeper
conversations about the radical inner shift we need to achieve lasting sustainability for all
beings.
ContributorsBerejnoi Bejarano, Erica Anahi (Author) / Cloutier, Scott (Thesis advisor) / Ulluwishewa, Rohana (Committee member) / Fonow, Mary Margaret (Committee member) / Afinowich, Robin (Committee member) / Arizona State University (Publisher)
Created2020
Description
The current sustainability crisis is born from a specious notion that humans are separate from and in a position of control over nature. In response, this dissertation reconceptualizes education beyond its current anthropocentric model to imagine education as learning through relationality with all that is ‘beyond’ the human. The study leaves behind hegemonic binary distinctions (human
ature, teacher/student, formal
on-formal education) to reimagine education as a multidirectional process of learning as worlding and becoming-with Earth (Haraway, 2016a). It explores what matters in education and how it comes to matter.
This dissertation introduces the concept of storyworlding to describe what occurs when multispecies, multi-mattered assemblages (re)write Earth’s narratives through their relationships with one another. Taking its inspiration from the work of the Common Worlds Research Collective, Donna Haraway, and Isabelle Stengers, storyworlding acknowledges that the relationships between and among all biotic and abiotic forces on Earth make stories through their interactions, and these stories make a pluriverse of worlds.
The study is structured as a natureculture (Haraway, 2003) ethnography. This innovation on ethnography, a traditionally human-centered method, focuses on agential, multispecies/ multi-mattered assemblages rather than the description of human culture. Data is not generated and then labeled as fixed in this study. It is emergent in its assemblages as a co-narrator in sympoietic storyworlding (Haraway, 2016b).
Data generation took place over 6 months in a small, coffee-producing region of Southeastern Brazil. Data generation methods included walking conversations with children and the more-than-human world, participation in a multi-grade, one-room schoolhouse, and the collection of visual and audio data such as drawings, photographs, videos, and audio recordings.
Using an intentionally slow, messy, and fluid diffractive analysis, I follow the data where it leads as I think with the concept of storyworlding (Barad, 2007; Mazzei, 2014). Drawing inspiration from Donna Haraway, Isabelle Stengers, and Iveta Silova, the dissertation concludes with an Epilogue of speculative fabulation (SF) imaginings through which I invite the reader to engage in the thought experiment of reimagining not only what matters in education, but what education, itself, is.
ature, teacher/student, formal
on-formal education) to reimagine education as a multidirectional process of learning as worlding and becoming-with Earth (Haraway, 2016a). It explores what matters in education and how it comes to matter.
This dissertation introduces the concept of storyworlding to describe what occurs when multispecies, multi-mattered assemblages (re)write Earth’s narratives through their relationships with one another. Taking its inspiration from the work of the Common Worlds Research Collective, Donna Haraway, and Isabelle Stengers, storyworlding acknowledges that the relationships between and among all biotic and abiotic forces on Earth make stories through their interactions, and these stories make a pluriverse of worlds.
The study is structured as a natureculture (Haraway, 2003) ethnography. This innovation on ethnography, a traditionally human-centered method, focuses on agential, multispecies/ multi-mattered assemblages rather than the description of human culture. Data is not generated and then labeled as fixed in this study. It is emergent in its assemblages as a co-narrator in sympoietic storyworlding (Haraway, 2016b).
Data generation took place over 6 months in a small, coffee-producing region of Southeastern Brazil. Data generation methods included walking conversations with children and the more-than-human world, participation in a multi-grade, one-room schoolhouse, and the collection of visual and audio data such as drawings, photographs, videos, and audio recordings.
Using an intentionally slow, messy, and fluid diffractive analysis, I follow the data where it leads as I think with the concept of storyworlding (Barad, 2007; Mazzei, 2014). Drawing inspiration from Donna Haraway, Isabelle Stengers, and Iveta Silova, the dissertation concludes with an Epilogue of speculative fabulation (SF) imaginings through which I invite the reader to engage in the thought experiment of reimagining not only what matters in education, but what education, itself, is.
ContributorsGoebel, Janna (Author) / Silova, Iveta (Thesis advisor) / Swadener, Beth Blue (Committee member) / Koro, Mirka (Committee member) / Arizona State University (Publisher)
Created2020
Description
The construction industry generates tremendous amounts of data every day. Data can inform practitioners to increase their project performance as well as the quality of the resulting built environment. The data gathered from each stage has unique characteristics, and processing them to the appropriate information is critical. However, it is often difficult to measure the impact of the research across project phases (i.e., planning, design, construction, operation and maintenance, and end-of-life). The goal of this dissertation is to present how industry data can be used to make an impact on construction practices and test a suite of methods to measure the impact of construction research across project phases. The dissertation provides examples of impactful research studies for each project phase to demonstrate the collection and utilization of data generated from each stage and to assess the potential tangible impact on construction industry practices. The completed studies presented both quantitative and qualitative analyses. The first study focuses on the planning phase and provides a practice to improve frond end planning (FEP) implementation by developing the project definition rating index (PDRI) maturity and accuracy total rating system (MATRS). The second study uses earned value management system (EVMS) information from the design and construction phases to support reliable project control and management. The dissertation then provides a third study, this time focusing on the operations phase and comparing the impact of project delivery methods using the international roughness index (IRI). Lastly, the end-of-life or decommissioning phase is tackled through a study that gauges the monetary impact of the circular economy concept applied to reuse construction and demolition (C&D) waste. This dissertation measures the impact of the research according to the knowledge mobilization (KMb) theory, which illustrates the value of the work to the public and to practitioners.
ContributorsCho, Namho (Author) / El Asmar, Mounir (Thesis advisor) / Gibson, George (Committee member) / Kaloush, Kamil (Committee member) / Arizona State University (Publisher)
Created2020