ASU Electronic Theses and Dissertations
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.
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- Creators: Feisst, Sabine
- Creators: Mobasher, Barzin
Description
There is a high demand for customized designs of various types of cement-based materials in order to address specific purposes in the construction field. These demands stem from the need to optimize the cementitious matrix properties and reinforcement choices, especially in high reliability, durability, and performance applications that include infrastructure, energy production, commercial buildings, and may ultimately be extended to low risk/high volume applications such as residential applications. The typical tools required to guide practicing engineers should be based on optimization algorithms that require highly efficient capacity and design alternatives and optimal computational tools. The general case of flexural design of members is an important aspect of design of structural members which can be extended to a variety of applications that include various cross-sections such as rectangular, W-sections, channels, angles, and T sections. The model utilized the simplified linear constitutive response of cement-based composite in compression and tension and extends into a two-segment elastic-plastic, strain softening, hardening, tension-stiffening, and a multi-segment system. The generalized parametric model proposed uses a dimensionless system in the stress-strain materials diagram to formulate piecewise equations for an equilibrium of internal stresses and obtains strain distributions for the closed-form solution of neutral axis location. This would allow for the computation of piecewise moment-curvature response. The number of linear residual stress implemented is flexible to a user to maintain a robust response. In the present approach bilinear, trilinear, and quad-linear models are addressed and a procedure for incorporating additional segments is presented. Moreover, a closed-form solution of moment-curvature can be solved and employed in calculating load-deflection response. The model is adaptable for various types of fiber-reinforced and textile reinforced concrete (FRC, TRC, UHPC, AAC, and Reinforced Concrete). The extensions to cover continuous fiber reinforcement such as textile reinforced concrete (TRC, FRCM) strengthening and repair are addressed. The theoretical model is extended to incorporate the hybrid design (HRC) with continuous rebar with FRC to increase the ductility and ultimate moment capacity. HRC extends the performance of the fiber system to incorporate residual capacity into a serviceability-based design that reduced the reliance on the design based on the limit state. The design chart for HRC and as well as conventional RC has been generated for practicing engineering applications. Results are compared to a large array of data from experimental results conducted at the ASU structural lab facilities and other published literature.
Contributorspleesudjai, chidchanok (Author) / Mobasher, Barzin (Thesis advisor) / Neithalath, Narayanan (Committee member) / Rajan, Subramaniam (Committee member) / Arizona State University (Publisher)
Created2021
Description
Layer-wise extrusion of soft-solid like cement pastes and mortars is commonly used in 3D printing of concrete. Rheological and mechanical characterization of the printable binder for on-demand flow and subsequent structuration is a critical challenge. This research is an effort to understand the mechanics of cementitious binders as soft solids in the fresh state, towards establishing material-process relationships to enhance print quality. This study introduces 3D printable binders developed based on rotational and capillary rheology test parameters, and establish the direct influence of packing coefficients, geometric ratio, slip velocities, and critical print velocities on the extrudate quality. The ratio of packing fraction to the square of average particle diameter (0.01-0.02), and equivalent microstructural index (5-20) were suitable for printing, and were directly related to the cohesion and extrusional yield stress of the material. In fact, steady state pressure for printing (30-40 kPa) is proportional to the extrusional yield stress, and increases with the geometric ratio (0-60) and print velocity (5-50 mm/s). Higher print velocities results in higher wall shear stresses and was exponentially related to the slip layer thickness (estimated between 1-5μ), while the addition of superplasticizers improve the slip layer thickness and the extrudate flow. However, the steady state pressure and printer capacity limits the maximum print velocity while the deadzone length limits the minimum velocity allowable (critical velocity regime) for printing. The evolution of buildability with time for the fresh state mortars was characterized with digital image correlation using compressive strain and strain rate in printed layers. The fresh state characteristics (interlayer and interfilamentous) and process parameters (layer height and fiber dimensions) influence the hardened mechanical properties. A lower layer height generally improves the mechanical properties and slight addition of fiber (up to 0.3% by volume) results in a 15-30% increase in the mechanical properties. 3D scanning and point-cloud analysis was also used to assess the geometric tolerance of a print based on mean error distances, print accuracy index, and layer-wise percent overlap. The research output will contribute to a synergistic material-process design and development of test methods for printability in the context of 3D printing of concrete.
ContributorsAmbadi Omanakuttan Nair, Sooraj Kumar (Author) / Neithalath, Narayanan (Thesis advisor) / Rajan, Subramaniam (Committee member) / Mobasher, Barzin (Committee member) / Hoover, Christian (Committee member) / Chawla, Nikhilesh (Committee member) / Arizona State University (Publisher)
Created2021
Description
Many filmmakers have explored the sonic possibilities offered by experimental, avant-garde, and modernist music as it prospered in the mid-twentieth century. Fascinatingly, horror cinema, with all its eerie subject matter, has championed the use of experimental music in its films. Since the silent-film era, horror has stood much to gain by deviating from the normative film scoring standards developed in Hollywood. Filmmakers indebted to horror continually seek new sounds and approaches to showcase the otherworldly and suspenseful themes of their films. Numerous movies that challenged the status quo through transformative scoring practices achieved distinction among rival films. The rise of auteurist films in the 1950s further instigated experimental practices as the studio system declined and created a space for new filmmakers to experiment with aesthetic strategies. Film music scholarship has paid relatively little attention to the convergences between experimental concert music and horror scoring practices. This topic is crucial, especially horror’s employment of existing experimental music, as it has played a critical role in American filmmaking in the second half of the twentieth century. My thesis traces the relationship between horror cinema and experimental music. I survey the use of experimental music throughout the history of horror films and examine the scores for three films: William Friedkin’s The Exorcist (1973), Stanley Kubrick’s The Shining (1980), and Martin Scorsese’s Shutter Island (2010). With my case studies of these three films, I aim to fill a significant gap in film music scholarship, highlight the powerful use of experimental music textures and timbres and demonstrate this music’s significant role in cultivating new scoring practices that succeed in engaging, unnerving and shocking audiences of horror cinema.
ContributorsAle, Lea (Author) / Feisst, Sabine (Thesis advisor) / Saucier, Catherine (Committee member) / Schmelz, Peter (Committee member) / Arizona State University (Publisher)
Created2021
Description
Increased awareness and technological solutions will not solve the global ecological crises of climate change and mass extinction by themselves. A fundamental shift is needed in how we view ourselves and our relationships with all life to avoid further degradation of the biosphere and ensure a more equitable future. A crucial part of such a shift means expanding the range of species that fall under human consideration. Viewing non-human life, including plants, as intrinsically rather than instrumentally valuable can be transformative to how we, as a species, think about and enact practices that encourage sustainable development. By highlighting the intelligence and communication abilities of plant life through artistic work, a strong counter-narrative can be developed against the dominant utilitarian view of plants as merely a resource for human cultivation and consumption. This dissertation explores plant intelligence and communication as models for music composition and networked sound installations. It is comprised of two complementary components, a sound installation, Unheard Voices, and the following document that explores the relevant artistic precedents, ecological, philosophical, and practice-based research that was conducted to facilitate the creation of the installation project. Focusing this research are the questions: 1) How can plant intelligence in communication, as outlined by plant neurobiologists and ecologists, serve as a model for creating sound installations? 2) How can such art pieces help viewers reflect on humanity’s interconnection to nature and reconsider plants as sentient, communicative, and intrinsically rather than instrumentally valuable?
ContributorsArne, Devin (Author) / Paine, Garth (Thesis advisor) / Feisst, Sabine (Committee member) / Broglio, Ronald (Committee member) / Arizona State University (Publisher)
Created2021
Description
Composite materials have gained interest in the aerospace, mechanical and civil engineering industries due to their desirable properties - high specific strength and modulus, and superior resistance to fatigue. Design engineers greatly benefit from a reliable predictive tool that can calculate the deformations, strains, and stresses of composites under uniaxial and multiaxial states of loading including damage and failure predictions. Obtaining this information from (laboratory) experimental testing is costly, time consuming, and sometimes, impractical. On the other hand, numerical modeling of composite materials provides a tool (virtual testing) that can be used as a supplemental and an alternate procedure to obtain data that either cannot be readily obtained via experiments or is not possible with the currently available experimental setup. In this study, a unidirectional composite (Toray T800-F3900) is modeled at the constituent level using repeated unit cells (RUC) so as to obtain homogenized response all the way from the unloaded state up until failure (defined as complete loss of load carrying capacity). The RUC-based model is first calibrated and validated against the principal material direction laboratory tests involving unidirectional loading states. Subsequently, the models are subjected to multi-directional states of loading to generate a point cloud failure data under in-plane and out-of-plane biaxial loading conditions. Failure surfaces thus generated are plotted and compared against analytical failure theories. Results indicate that the developed process and framework can be used to generate a reliable failure prediction procedure that can possibly be used for a variety of composite systems.
ContributorsKatusele, Daniel Mutahwa (Author) / Rajan, Subramaniam (Thesis advisor) / Mobasher, Barzin (Committee member) / Neithalath, Narayanan (Committee member) / Arizona State University (Publisher)
Created2021
Description
Alkali-activated aluminosilicates, commonly known as "geopolymers", are being increasingly studied as a potential replacement for Portland cement. These binders use an alkaline activator, typically alkali silicates, alkali hydroxides or a combination of both along with a silica-and-alumina rich material, such as fly ash or slag, to form a final product with properties comparable to or better than those of ordinary Portland cement. The kinetics of alkali activation is highly dependent on the chemical composition of the binder material and the activator concentration. The influence of binder composition (slag, fly ash or both), different levels of alkalinity, expressed using the ratios of Na2O-to-binders (n) and activator SiO2-to-Na2O ratios (Ms), on the early age behavior in sodium silicate solution (waterglass) activated fly ash-slag blended systems is discussed in this thesis. Optimal binder composition and the n values are selected based on the setting times. Higher activator alkalinity (n value) is required when the amount of slag in the fly ash-slag blended mixtures is reduced. Isothermal calorimetry is performed to evaluate the early age hydration process and to understand the reaction kinetics of the alkali activated systems. The differences in the calorimetric signatures between waterglass activated slag and fly ash-slag blends facilitate an understanding of the impact of the binder composition on the reaction rates. Kinetic modeling is used to quantify the differences in reaction kinetics using the Exponential as well as the Knudsen method. The influence of temperature on the reaction kinetics of activated slag and fly ash-slag blends based on the hydration parameters are discussed. Very high compressive strengths can be obtained both at early ages as well as later ages (more than 70 MPa) with waterglass activated slag mortars. Compressive strength decreases with the increase in the fly ash content. A qualitative evidence of leaching is presented through the electrical conductivity changes in the saturating solution. The impact of leaching and the strength loss is found to be generally higher for the mixtures made using a higher activator Ms and a higher n value. Attenuated Total Reflectance-Fourier Transform Infrared Spectroscopy (ATR-FTIR) is used to obtain information about the reaction products.
ContributorsChithiraputhiran, Sundara Raman (Author) / Neithalath, Narayanan (Thesis advisor) / Rajan, Subramaniyam D (Committee member) / Mobasher, Barzin (Committee member) / Arizona State University (Publisher)
Created2012
Description
While much has been written on the history of Education Concerts in the United States, there is a void in research focused on actual content, structure, and purposes of these concerts. This document seeks to fill this void through a detailed examination of salient aspects of Education Concerts, including programming, structure, rehearsal, and performance considerations. In conjunction with my research, I will draw on my first-hand experience as Associate Conductor of the Seattle Symphony, providing a glimpse into the creative challenges and solutions that confront a contemporary orchestra. Additionally, my research endeavors to discover ways of transforming the historically rigid model of orchestral operations into a structure that embraces diversity, equity, and inclusion, encourages connections, and sparks curiosity. The goal of this research, therefore, is to provide tangible references and practical guidance to the conductor or administrator who is venturing into the richness of Education Concert programming and performance in today’s everchanging orchestral landscape.
ContributorsXia, Sunny Xuecong (Author) / Caslor, Jason (Thesis advisor) / Bolanos, Gabriel (Committee member) / Feisst, Sabine (Committee member) / Meyer, Jeffery (Committee member) / Arizona State University (Publisher)
Created2023
Description
Ben Moore’s So Free Am I is a fascinating, yet little known song cycle addressing feminist concerns. This work consists of seven settings of poems by women, namely Amy Lowell, Katherine Philips, Anna Wickham, Dorothy Parker, and Muriel Rukeyser. It also features settings of texts by two anonymous 6th-century Buddhist nuns, which are translated into English by Uma Chakravarti and Kumkum Roy. The texts are diverse and all speak to the courage and dignity of women in the face of oppression. In this case study and performance guide, one of the primary purposes is to show how the poets’ lives and adversities inform their texts, and thus offers engagement for musical interpretation.
After a brief introduction of composer Ben Moore and his song cycle, each poet and text is discussed, providing biographical summaries and general interpretations of each poet’s text. What follows is a detailed reading of the text, illuminated by the poet’s particular life experiences. In the case of every text setting, the compositional interpretation was decidedly enhanced by the perspective of the poet, which could not be ascertained without the research into that particular poet’s life. I also offer a performance guide for selected songs, numbers I, III, and VII, which Moore recommends as an effective small set for performance. Finally, I hope that this study of Moore’s song cycle and the biographical sketches of each poet will be of help in the advancement women’s rights and to combat the oppression of women. It is further hoped that this study will encourage the performance of these songs and therefore lend these otherwise marginalized women a voice.
ContributorsHatch, Michelle Broadbent (Author) / Hawkins, Gordon (Thesis advisor) / Feisst, Sabine (Committee member) / Dreyfoos, Dale (Committee member) / Arizona State University (Publisher)
Created2024
Description
My approach to performing contemporary music, like many others, is centeredaround storytelling that merges the intention of the composer with my own interpretation. The balance between the two is unique for every work, as well as the sources of inspiration that shape each interpretation. In some cases, it works well to rely heavily on the historical context of the piece and the specific inspiration and process of the composer. In other cases, the composer desires more freedom and flexibility in the performance of their work, and the story of the piece is woven from the threads of personal stories, emotions, and imagery of the performer. For this project, I made audio recordings of three pieces including Seare Farhat’s Three Children’s Songs for Singing Percussionist, Keiko Abe’s Marimba d’Amore, and Thomas Kotcheffs Obbligato Snare Drum Music No. 1: The Power of Love. I then used these recordings to make music videos that blend elements of pop music videos and classical performance videos, using performance footage as well as narrative and abstract visuals to experiment with video making as a creative outlet while building a performance portfolio that represents me as an artist. In addition to a reflection of my process, this document is also designed as a resource for performers who are interested in learning how to make their own audio and video recordings, covering topics including project planning and preparation, working with collaborators, selecting gear, practicing for studio recordings, and designing and producing videos.
ContributorsSutherland, Morgan Brooke (Author) / Compitello, Michael (Thesis advisor) / Feisst, Sabine (Committee member) / Bolanos, Gabriel (Committee member) / Arizona State University (Publisher)
Created2024