Matching Items (14)
Description
Demands in file size and transfer rates for consumer-orientated products have escalated in recent times. This is primarily due to the emergence of high definition video content. Now factor in the consumer desire for convenience, and we find that wireless service is the most desired approach for inter-connectivity. Consumers expect wireless service to emulate wired service with little to virtually no difference in quality of service (QoS). The background section of this document examines the QoS requirements for wireless connectivity of high definition video applications. I then proceed to look at proposed solutions at the physical (PHY) and the media access control (MAC) layers as well as cross-layer schemes. These schemes are subsequently are evaluated in terms of usefulness in a multi-gigabit, 60 GHz wireless multimedia system targeting the average consumer. It is determined that a substantial gap in published literature exists pertinent to this application. Specifically, little or no work has been found that shows how an adaptive PHYMAC cross-layer solution that provides real-time compensation for varying channel conditions might be actually implemented. Further, no work has been found that shows results of such a model. This research proposes, develops and implements in Matlab code an alternate cross-layer solution that will provide acceptable QoS service for multimedia applications. Simulations using actual high definition video sequences are used to test the proposed solution. Results based on the average PSNR metric show that a quasi-adaptive algorithm provides greater than 7 dB of improvement over a non-adaptive approach while a fully-adaptive alogrithm provides over18 dB of improvement. The fully adaptive implementation has been conclusively shown to be superior to non-adaptive techniques and sufficiently superior to even quasi-adaptive algorithms.
ContributorsBosco, Bruce (Author) / Reisslein, Martin (Thesis advisor) / Tepedelenlioğlu, Cihan (Committee member) / Sen, Arunabha (Committee member) / Arizona State University (Publisher)
Created2011
Description
This thesis describes research into the application of socially reflective, or "Slow", design principles to modern mediated systems, or "Fast" technology. The "information overload" caused by drastic changes in the nature of human communications in the last decade has become a serious problem, with many human-technology interactions creating mental confusion, personal discomfort and a sense of disconnection. Slow design principles aim to help create interactions that avoid these problems by increasing interaction richness, encouraging engagement with local communities, and promoting personal and communal reflection. Three major functional mediated systems were constructed to examine the application of Slow principles on multiple scales: KiteViz, Taskville and Your ____ Here. Each system was designed based on a survey of current research within the field and previous research results. KiteViz is a visually metaphorical display of Twitter activity within a small group, Taskville is a workplace game designed to support collaboration and group awareness in an enterprise, and Your ____ Here is a physical-digital projection system that augments built architecture with user-submitted content to promote discussion and reflection. Each system was tested with multiple users and user groups, the systems were evaluated for their effectiveness in supporting each of the tenets of Slow design, and the results were collected into a set of key findings. Each system was considered generally effective, with specific strengths varying. The thesis concludes with a framework of five major principles to be used in the design of modern, highly-mediated systems that still apply Slow design principles: design for fundamental understanding, handle complexity gracefully, Slow is a process of evolution and revelation, leverage groups and personal connections to encode value, and allow for participation across a widely distributed range of scales.
ContributorsLinn, Silvan (Author) / Kelliher, Aisling G (Thesis advisor) / Tinapple, David (Committee member) / Boradkar, Prasad (Committee member) / Arizona State University (Publisher)
Created2011
Description
Contemporary cities are physical and virtual. This thesis describes the findings of a mixed-methods study concerning visual images of the city in the urban Northeast of the United States. I ground these approaches in existing literature concerning digital media, visual narrative, genre ecology, urban planning, and virtual places. The first part of the study analyzes the results of a survey in which 150 people responded to questions about social media use and the relationships between image type and the functions of social media in urban contexts. The second part of the study analyzes the results of coding one year of visual images tweeted by @CambMA, the municipal Twitter feed for the City of Cambridge, Massachusetts. These approaches required the development of new tools for analyzing visual communication and genre moves in specific media contexts. My research suggests that specific image types are suited for specific media functions in the context of visual communication in virtual urban environments and that some image types are especially effective in capturing and expressing the city. These findings provide potential strategies for municipal social media channels to consider in terms of how they communicate with their audiences.
ContributorsDel Nero, Zachary (Author) / Maid, Barry (Thesis advisor) / D'Angelo, Barbara (Committee member) / Mara, Andrew (Committee member) / Arizona State University (Publisher)
Created2019
Description
Long before “fake news” dominated the conversation within and about the media, media literacy advocates have championed the need for media literacy education that provides the tools for people to understand, analyze, and evaluate media messages. That the majority of U.S. adults now consume news on social media underscores the importance for students of all ages to be critical users of media. Furthermore, the affordances of social media to like, comment, and share news items within one’s network increases an individual’s responsibility to ascertain the veracity of news before using a social media megaphone to spread false information. Social media’s shareability can dictate how information spreads, increasing news consumers’ role as a gatekeeper of information and making media literacy education more important than ever.
This research examines the media literacy practices that news consumers use to inform their gatekeeping decisions. Using a constant comparative coding method, the author conducted a qualitative analysis of hundreds of discussion board posts from adult participants in a digital media literacy Massive Open Online Course (MOOC) to identify major themes and examine growth in participants’ sense of responsibility related to sharing news information, their feeling of empowerment to make informed decisions about the media messages they receive, and how the media literacy tools and techniques garnered from the MOOC have affected their daily media interactions. Findings emphasize the personal and contextual nature of media literacy, and that those factors must be addressed to ensure the success of a media literacy education program.
This research examines the media literacy practices that news consumers use to inform their gatekeeping decisions. Using a constant comparative coding method, the author conducted a qualitative analysis of hundreds of discussion board posts from adult participants in a digital media literacy Massive Open Online Course (MOOC) to identify major themes and examine growth in participants’ sense of responsibility related to sharing news information, their feeling of empowerment to make informed decisions about the media messages they receive, and how the media literacy tools and techniques garnered from the MOOC have affected their daily media interactions. Findings emphasize the personal and contextual nature of media literacy, and that those factors must be addressed to ensure the success of a media literacy education program.
ContributorsRoschke, Kristy (Author) / Thornton, Leslie-Jean (Thesis advisor) / Chadha, Monica (Committee member) / Halavais, Alexander (Committee member) / Silcock, Bill (Committee member) / Arizona State University (Publisher)
Created2018
Description
The current study investigated how multimedia pacing (learner-control versus system-paced) and presentation styles (visual-only versus audio/visual) impact learning physics concept material, mental effort, and self-efficacy. This 2X2 factorial study randomly assigned participants into one of four conditions that manipulated presentation style (visual-only versus audio/visual) and pacing of the content (system-paced versus learning-controlled). Participant's learning was measured by recording their retention of information and ability to transfer information. Measures of perceived difficulty (mental effort) and perceived ability (self-efficacy) were also obtained. No significant effects were observed in this study which doesn’t support the existence of either the modality or reverse modality effect at least in these noisier online learning environments. In addition, the hypothesis that their effects could be an artifact of experimental design could not be proven as the learner control condition did not yield any significant results.
ContributorsKrause, Tyler (Author) / Craig, Scotty D. (Thesis advisor) / Gray, Robert (Committee member) / Branaghan, Russell (Committee member) / Arizona State University (Publisher)
Created2018
Description
The Arab Spring revolutions of 2010-11 raised important questions about how social-movement actors use new communication technologies, such as social media, for communication and organizing during episodes of contentious politics. This dissertation examines how organizers of and participants in Tunisia’s Arab Spring revolution used communication technologies such as Facebook, blogs, news websites, email, television, radio, newspapers, telephones, and interpersonal communication. The dissertation approaches the topic through the communication paradigm of framing, which the author uses to tie together theories of social movements, neo-patrimonialism, and revolution. The author traveled to Tunisia and conducted 44 interviews with organizers and participants about their uses of communication media, the frames they constructed and deployed, their framing strategies, their organizing activities, and their experiences of the revolution. The most common frames were those of the regime’s corruption, economic issues, and the security forces’ brutality. Interviewees deployed a hybrid network of media to disseminate these frames; Facebook represented a single node in the network, though many interviewees used it more than any other node. To explain the framing process and the resonance of the frames deployed by revolutionaries, the dissertation creates the concept of the alternative narrative, which describes how revolutionaries used a hybrid network to successfully construct an alternative to the narrative constructed by the regime. The dissertation also creates the concept of authoritarian weakening, to explain how citizens can potentially weaken neo-patrimonial regimes under conditions concerning corruption, poverty, and the introduction of civil society and of new communication technologies.
ContributorsBluhm, Michael (Author) / Russell, Dennis (Thesis advisor) / Ruggill, Judd (Thesis advisor) / Russomanno, Joseph (Committee member) / Silcock, William (Committee member) / Arizona State University (Publisher)
Created2018
Description
The increased risk of falling and the worse ability to perform other daily physical activities in the elderly cause concern about monitoring and correcting basic everyday movement. In this thesis, a Kinect-based system was designed to assess one of the most important factors in balance control of human body when doing Sit-to-Stand (STS) movement: the postural symmetry in mediolateral direction. A symmetry score, calculated by the data obtained from a Kinect RGB-D camera, was proposed to reflect the mediolateral postural symmetry degree and was used to drive a real-time audio feedback designed in MAX/MSP to help users adjust themselves to perform their movement in a more symmetrical way during STS. The symmetry score was verified by calculating the Spearman correlation coefficient with the data obtained from Inertial Measurement Unit (IMU) sensor and got an average value at 0.732. Five healthy adults, four males and one female, with normal balance abilities and with no musculoskeletal disorders, were selected to participate in the experiment and the results showed that the low-cost Kinect-based system has the potential to train users to perform a more symmetrical movement in mediolateral direction during STS movement.
ContributorsZhou, Henghao (Author) / Turaga, Pavan (Thesis advisor) / Ingalls, Todd (Committee member) / Papandreou-Suppappola, Antonia (Committee member) / Arizona State University (Publisher)
Created2016
Description
In the fast-paced, technology-driven society of today, new demands are placed on artists to re-think how music is presented and communicated to the world. Access to the internet, development of sound manipulation software, and broader means of use and distribution through the digital music industry have drastically shifted the way the twenty-first century artist creates and performs music. One of the most striking changes that occurred is the increased use of visual material as a vehicle to enhance and contribute to the depth and intrigue of live performances and recordings.
This project researches twenty-first century works for clarinet and multimedia that specifically include a visual element (including but not limited to images, fixed and interactive video, light effects, and choreography) and highlights the prevalence of this genre in contemporary repertoire. Discussion begins with a brief overview of the history of multimedia, its relation to the clarinet, and how it has been defined by the twenty-first century. Additionally, in order to contribute to this ever-growing repertoire, three new works for clarinet and multimedia were commissioned in collaboration with composers and visual artists. These new works include: Roadrunner (2019) for clarinet and fixed electronics by Spencer Brand with video by Samuel Proctor; I’d known this place (2020) for clarinet and electronics by Dan Caputo with live audio generative animations by Andrew Robinson; and Spectral Passages (2020) for clarinet and electronics by Alvaro Varas with painting by Miguel Godoy. Background information and performance guides are included for each piece to aid future musicians in performance, as well as respective audio/video recordings. Finally, a significant portion of this document includes a catalog of works for clarinet and multimedia. The catalog was compiled by focusing on the output of twenty-first century composers to serve as a resource for future performers.
This project researches twenty-first century works for clarinet and multimedia that specifically include a visual element (including but not limited to images, fixed and interactive video, light effects, and choreography) and highlights the prevalence of this genre in contemporary repertoire. Discussion begins with a brief overview of the history of multimedia, its relation to the clarinet, and how it has been defined by the twenty-first century. Additionally, in order to contribute to this ever-growing repertoire, three new works for clarinet and multimedia were commissioned in collaboration with composers and visual artists. These new works include: Roadrunner (2019) for clarinet and fixed electronics by Spencer Brand with video by Samuel Proctor; I’d known this place (2020) for clarinet and electronics by Dan Caputo with live audio generative animations by Andrew Robinson; and Spectral Passages (2020) for clarinet and electronics by Alvaro Varas with painting by Miguel Godoy. Background information and performance guides are included for each piece to aid future musicians in performance, as well as respective audio/video recordings. Finally, a significant portion of this document includes a catalog of works for clarinet and multimedia. The catalog was compiled by focusing on the output of twenty-first century composers to serve as a resource for future performers.
ContributorsClements, Katrina Isabel (Author) / Spring, Robert (Thesis advisor) / Gardner, Joshua (Thesis advisor) / Meyer, Jeffery (Committee member) / Micklich, Albie (Committee member) / Rockmaker, Jody (Committee member) / Arizona State University (Publisher)
Created2020
Description
Lesbian, gay, bisexual, transgender and queer (LGBTQ+) individuals experience a variety of types of representation, particularly in media outlets. While the quantity of such representations is steadily increasing, research must continue to examine the content of representations as they become available. This examination is important as much of society is determined by discourses presented in media outlets. Further, media often produces and reproduces dominant narratives about minority groups. Television is one arena where individuals come to learn about themselves and others. Particularly, the sitcom genre can be useful for figuring out how to deal with real-world issues in a humorous and entertaining way. However, the humor of sitcom does not exclude it from the meaning-making and identity-formation systems present in television and media, more broadly. Thus, this study investigates the discourses surrounding LGBTQ+ representation in the Canadian sitcom Schitt’s Creek through critical and rhetorical discursive analyses while also applying principles of queer theory throughout. Results indicate while Schitt’s Creek does many things well in terms of its representation of LGBTQ+ individuals, problematic stereotypes still often remain. In other words, Schitt’s Creek breaks from typical LGBTQ+ representation found in sitcoms, but often still embodies dominant cultural narratives used to degrade, restrict, and punish LGBTQ+ individuals. This is particularly evident as one examines the ways Schitt’s Creek often falls into heteronormative standards and continually polices the sexual nature of LGBTQ+ individuals to display a safe and comfortable version of homosexuality. Therefore, Schitt’s Creek may often and unknowingly reinforce the heteronormative hegemonies it seeks to break from.
ContributorsKiourkas, Steffanie M (Author) / Mean, Lindsey (Thesis advisor) / Walker, Michael (Committee member) / Gruber, Diane (Committee member) / Arizona State University (Publisher)
Created2023
Description
With widespread increases in the use of electronic communication technology, cyber-sexual harassment (CSH) has been on the rise. Broadly defined, CSH is unwelcome and repeated conduct of a sexual nature performed through electronic technology. The prevalence of CSH reported in previous studies varies significantly due in part to inconsistencies in how CSH is defined and measured. Whereas four existing scales measuring aspects of CSH have been published, each has several limitations. This research aims to develop and psychometrically validate the Multidimensional Cyber-Sexual Harassment Experiences and Attitudes Scale for Victimization (MCSHEA-V), which taps into five key components of CSH, including: (1) gathering sexual information online, (2) image and video-based sexual harassment, (3) offensive comments or posts, (4) coercive behaviors, and (5) CSH attitudes. In Study 1, a sample of psychology graduate students and faculty (N = 13) evaluated the content validity of the MCSHEA-V items, leading to key improvements in item relevance, clarity, and wording. In Study 2, a sample of adult participants (N = 298) completed the initial version of the scale through the online survey platform, Prolific.co. Confirmatory factor analyses indicated the proposed 5-factor structure was a good fit, but exploratory factor analyses indicated the items represented an alternative 4-factor structure. Specifically, these items captured dyadic CSH behaviors, CSH behaviors that affect one’s reputation, perceptions of the seriousness of CSH, and CSH victim-blaming behaviors. In Study 3, an additional sample of adult participants (N = 207) was surveyed via Prolific.co. Separate confirmatory factor analyses indicated the 4-factor model was the best fit. Overall, the MCSHEA-V will contribute to a clearer understanding of the defining features and prevalence of CSH victimization and facilitate future research through the introduction of a psychometrically-validated measurement tool.
ContributorsWheeler, Brittany (Author) / Hall, Deborah (Thesis advisor) / Mickelson, Kristin (Committee member) / Burleson, Mary (Committee member) / Arizona State University (Publisher)
Created2022