Matching Items (6)
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- All Subjects: Science history
- Creators: Wetmore, Jameson
- Creators: Lussier, Mark
- Resource Type: Text
Description
In recent years we have witnessed a shift towards multi-processor system-on-chips (MPSoCs) to address the demands of embedded devices (such as cell phones, GPS devices, luxury car features, etc.). Highly optimized MPSoCs are well-suited to tackle the complex application demands desired by the end user customer. These MPSoCs incorporate a constellation of heterogeneous processing elements (PEs) (general purpose PEs and application-specific integrated circuits (ASICS)). A typical MPSoC will be composed of a application processor, such as an ARM Coretex-A9 with cache coherent memory hierarchy, and several application sub-systems. Each of these sub-systems are composed of highly optimized instruction processors, graphics/DSP processors, and custom hardware accelerators. Typically, these sub-systems utilize scratchpad memories (SPM) rather than support cache coherency. The overall architecture is an integration of the various sub-systems through a high bandwidth system-level interconnect (such as a Network-on-Chip (NoC)). The shift to MPSoCs has been fueled by three major factors: demand for high performance, the use of component libraries, and short design turn around time. As customers continue to desire more and more complex applications on their embedded devices the performance demand for these devices continues to increase. Designers have turned to using MPSoCs to address this demand. By using pre-made IP libraries designers can quickly piece together a MPSoC that will meet the application demands of the end user with minimal time spent designing new hardware. Additionally, the use of MPSoCs allows designers to generate new devices very quickly and thus reducing the time to market. In this work, a complete MPSoC synthesis design flow is presented. We first present a technique \cite{leary1_intro} to address the synthesis of the interconnect architecture (particularly Network-on-Chip (NoC)). We then address the synthesis of the memory architecture of a MPSoC sub-system \cite{leary2_intro}. Lastly, we present a co-synthesis technique to generate the functional and memory architectures simultaneously. The validity and quality of each synthesis technique is demonstrated through extensive experimentation.
ContributorsLeary, Glenn (Author) / Chatha, Karamvir S (Thesis advisor) / Vrudhula, Sarma (Committee member) / Shrivastava, Aviral (Committee member) / Beraha, Rudy (Committee member) / Arizona State University (Publisher)
Created2013
Description
The quality and quantity of talented members of the US STEM workforce has
been a subject of great interest to policy and decision makers for the past 40 years.
Recent research indicates that while there exist specific shortages in specific disciplines
and areas of expertise in the private sector and the federal government, there is no
noticeable shortage in any STEM academic discipline, but rather a surplus of PhDs
vying for increasingly scarce tenure track positions. Despite the seeming availability
of industry and private sector jobs, recent PhDs still struggle to find employment in
those areas. I argue that the decades old narrative suggesting a shortage of STEM
PhDs in the US poses a threat to the value of the natural science PhD, and that
this narrative contributes significantly to why so many PhDs struggle to find career
employment in their fields. This study aims to address the following question: what is
the value of a STEM PhD outside academia? I begin with a critical review of existing
literature, and then analyze programmatic documents for STEM PhD programs at
ASU, interviews with industry employers, and an examination the public face of value
for these degrees. I then uncover the nature of the value alignment, value disconnect,
and value erosion in the ecosystem which produces and then employs STEM PhDs,
concluding with specific areas which merit special consideration in an effort to increase
the value of these degrees for all stakeholders involved.
been a subject of great interest to policy and decision makers for the past 40 years.
Recent research indicates that while there exist specific shortages in specific disciplines
and areas of expertise in the private sector and the federal government, there is no
noticeable shortage in any STEM academic discipline, but rather a surplus of PhDs
vying for increasingly scarce tenure track positions. Despite the seeming availability
of industry and private sector jobs, recent PhDs still struggle to find employment in
those areas. I argue that the decades old narrative suggesting a shortage of STEM
PhDs in the US poses a threat to the value of the natural science PhD, and that
this narrative contributes significantly to why so many PhDs struggle to find career
employment in their fields. This study aims to address the following question: what is
the value of a STEM PhD outside academia? I begin with a critical review of existing
literature, and then analyze programmatic documents for STEM PhD programs at
ASU, interviews with industry employers, and an examination the public face of value
for these degrees. I then uncover the nature of the value alignment, value disconnect,
and value erosion in the ecosystem which produces and then employs STEM PhDs,
concluding with specific areas which merit special consideration in an effort to increase
the value of these degrees for all stakeholders involved.
ContributorsGarbee, Elizabeth (Author) / Maynard, Andrew D. (Thesis advisor) / Wetmore, Jameson (Committee member) / Anderson, Derrick (Committee member) / Arizona State University (Publisher)
Created2018
Description
Scientific and Cultural Interpretations of Volcanoes, 1766-1901 analyzes nineteenth-century conceptions of volcanoes through interdisciplinary literature and science studies. The project considers how people in the nineteenth century used science, aesthetics, and other ways of knowing to understand volcanoes and their operations. In the mid-eighteenth century, volcanoes were seen as singular, unique features of the planet that lacked temporal and terrestrial reach. By the end of the nineteenth century, volcanoes were seen as networked, environmental phenomena that stretched through geological time and geographic space. Scientific and Cultural Interpretations of Volcanoes, 1766-1901 offers a new historical understanding of volcanoes and their environmental connections, using literature and science to show how perceptions of volcanic time and space changed over 135 years.
The first chapter, using texts by Sir William Hamilton, Hester Piozzi, and Priscilla Wakefield, argues that in the late eighteenth century important aspects of volcanoes, like their impact upon human life and their existence through time, were beginning to be defined in texts ranging from the scientific to the educational. The second chapter focuses on works by Sir Edward Bulwer-Lytton and Charles Lyell to demonstrate the ways that volcanoes were stripped of metaphysical or symbolic meaning as the nineteenth century progressed. The third chapter contrasts the 1883 eruption of Krakatoa with Constance Gordon-Cumming’s travels to Kīlauea. The chapter shows how even towards the end of the century, trying to connect human minds with the process of volcanic phenomenon was a substantial challenge, but that volcanoes like Kīlauea allowed for new conceptions of volcanic action. The last chapter, through a post-apocalyptic novel by M. P. Shiel, shows how volcanoes were finally beginning to be categorized as a primary agent within the environment, shaping all life including humanity. Ultimately, I argue that the change in thinking about volcanoes parallels today’s shift in thinking about global climate change. My work provides insight into how we imagine ecological catastrophes like volcanic eruptions or climate change in the past and present and what that means for their impact on people.
The first chapter, using texts by Sir William Hamilton, Hester Piozzi, and Priscilla Wakefield, argues that in the late eighteenth century important aspects of volcanoes, like their impact upon human life and their existence through time, were beginning to be defined in texts ranging from the scientific to the educational. The second chapter focuses on works by Sir Edward Bulwer-Lytton and Charles Lyell to demonstrate the ways that volcanoes were stripped of metaphysical or symbolic meaning as the nineteenth century progressed. The third chapter contrasts the 1883 eruption of Krakatoa with Constance Gordon-Cumming’s travels to Kīlauea. The chapter shows how even towards the end of the century, trying to connect human minds with the process of volcanic phenomenon was a substantial challenge, but that volcanoes like Kīlauea allowed for new conceptions of volcanic action. The last chapter, through a post-apocalyptic novel by M. P. Shiel, shows how volcanoes were finally beginning to be categorized as a primary agent within the environment, shaping all life including humanity. Ultimately, I argue that the change in thinking about volcanoes parallels today’s shift in thinking about global climate change. My work provides insight into how we imagine ecological catastrophes like volcanic eruptions or climate change in the past and present and what that means for their impact on people.
ContributorsLinthicum, Kent Robert (Author) / Lussier, Mark (Thesis advisor) / Bivona, Daniel (Committee member) / Looser, Devoney (Committee member) / Tromp, Marlene (Committee member) / Arizona State University (Publisher)
Created2016
Description
In the fifteen years between the discovery of fetal alcohol syndrome (FAS) in 1973 and the passage of alcohol beverage warning labels in 1988, FAS transformed from a medical diagnosis between practitioner and pregnant women to a broader societal risk imbued with political and cultural meaning. I examine how scientific, social, moral, and political narratives dynamically interacted to construct the risk of drinking during pregnancy and the public health response of health warning labels on alcohol. To situate such phenomena I first observe the closest regulatory precedents, the public health responses to thalidomide and cigarettes, which established a federal response to fetal risk. I then examine the history of how the US defined and responded to the social problem of alcoholism, paying particular attention to the role of women in that process. Those chapters inform my discussion of how the US reengaged with alcohol control at the federal level in the last quarter of the twentieth century. In the 1970s, FAS allowed federal agencies to carve out disciplinary authority, but robust public health measures were tempered by uncertainty surrounding issues of bureaucratic authority over labeling, and the mechanism and extent of alcohol’s impact on development. A socially conservative presidency, dramatic budgetary cuts, and increased industry funding reshaped the public health approach to alcoholism in the 1980s. The passage of labeling in 1988 required several conditions: a groundswell of other labeling initiatives that normalized the practice; the classification of other high profile, socially unacceptable alcohol-related behaviors such as drunk driving and youth drinking; and the creation of a dual public health population that faced increased medical, social, and political scrutiny, the pregnant woman and her developing fetus.
ContributorsO'Neil, Erica (Author) / Maienschein, Jane (Thesis advisor) / Hurlbut, James (Committee member) / Ellison, Karin (Committee member) / Wetmore, Jameson (Committee member) / Arizona State University (Publisher)
Created2016
Description
This dissertation examines the efforts of the Carnegie Image Tube Committee (CITC), a group created by Vannevar Bush and composed of astronomers and physicists, who sought to develop a photoelectric imaging device, generally called an image tube, to aid astronomical observations. The Carnegie Institution of Washington’s Department of Terrestrial Magnetism coordinated the CITC, but the committee included members from observatories and laboratories across the United States. The CITC, which operated from 1954 to 1976, sought to replace direct photography as the primary means of astronomical imaging.
Physicists, who gained training in electronics during World War II, led the early push for the development of image tubes in astronomy. Vannevar Bush’s concern for scientific prestige led him to form a committee to investigate image tube technology, and postwar federal funding for the sciences helped the CITC sustain development efforts for a decade. During those development years, the CITC acted as a mediator between the astronomical community and the image tube producers but failed to engage astronomers concerning various development paths, resulting in a user group without real buy-in on the final product.
After a decade of development efforts, the CITC designed an image tube, which Radio Corporation of American manufactured, and, with additional funding from the National Science Foundation, the committee distributed to observatories around the world. While excited about the potential of electronic imaging, few astronomers used the Carnegie-developed device regularly. Although the CITC’s efforts did not result in an overwhelming adoption of image tubes by the astronomical community, examining the design, funding, production, and marketing of the Carnegie image tube shows the many and varied processes through which astronomers have acquired new tools. Astronomers’ use of the Carnegie image tube to acquire useful scientific data illustrates factors that contribute to astronomers’ adoption or non-adoption of those new tools.
Physicists, who gained training in electronics during World War II, led the early push for the development of image tubes in astronomy. Vannevar Bush’s concern for scientific prestige led him to form a committee to investigate image tube technology, and postwar federal funding for the sciences helped the CITC sustain development efforts for a decade. During those development years, the CITC acted as a mediator between the astronomical community and the image tube producers but failed to engage astronomers concerning various development paths, resulting in a user group without real buy-in on the final product.
After a decade of development efforts, the CITC designed an image tube, which Radio Corporation of American manufactured, and, with additional funding from the National Science Foundation, the committee distributed to observatories around the world. While excited about the potential of electronic imaging, few astronomers used the Carnegie-developed device regularly. Although the CITC’s efforts did not result in an overwhelming adoption of image tubes by the astronomical community, examining the design, funding, production, and marketing of the Carnegie image tube shows the many and varied processes through which astronomers have acquired new tools. Astronomers’ use of the Carnegie image tube to acquire useful scientific data illustrates factors that contribute to astronomers’ adoption or non-adoption of those new tools.
ContributorsThompson, Samantha Michelle (Author) / Ellison, Karin (Thesis advisor) / Wetmore, Jameson (Thesis advisor) / Maienschein, Jane (Committee member) / Creath, Richard (Committee member) / DeVorkin, David (Committee member) / Arizona State University (Publisher)
Created2019
Description
At the beginning of the nineteenth century, there was no universal term to describe a person who practiced science. In 1833, the term “scientist” was proposed to recognize these individuals, but exactly who was represented by this term was still ambiguous. Supported by Bruno Latour’s theory of networks and hybridity, The Emerging Scientist takes a historical approach to analyze the different collectives of individuals who influenced the cultural perception of science and therefore aided in defining the role of the emerging scientist during the nineteenth century.
Each chapter focuses on a collective in the science network that influenced the development of the scientist across the changing scientific landscape of the nineteenth century. Through a study of William Small and Herbert Spencer, the first chapter investigates the informal clubs that prove to be highly influential due, in part, to the freedom individuals gain by being outside of formal institutions. Through an investigation of the lives and works of professional astronomer, Caroline Herschel, and physicist and mathematician, James Clerk Maxwell, chapter two analyzes the collective of professional practitioners of science to unveil the way in which scientific advancement actually occurred. Chapter three argues for the role of women in democratizing science and expanding the pool from which future scientists would come through a close analysis of Jane Marcet and Agnes Clerke, members of the collective of female popularizers of science. The final chapter examines how the collective of fictional depictions of science and the scientist ultimately are part of the cultural perception of the scientist through a close reading of Shelley’s Alastor; or, the Spirit of Solitude and Wilde’s The Picture of Dorian Gray. Ultimately, The Emerging Scientist aims to recreate the way science is studied in order to generate a more comprehensive understanding of the influences on developing science and the scientist during the nineteenth century.
Each chapter focuses on a collective in the science network that influenced the development of the scientist across the changing scientific landscape of the nineteenth century. Through a study of William Small and Herbert Spencer, the first chapter investigates the informal clubs that prove to be highly influential due, in part, to the freedom individuals gain by being outside of formal institutions. Through an investigation of the lives and works of professional astronomer, Caroline Herschel, and physicist and mathematician, James Clerk Maxwell, chapter two analyzes the collective of professional practitioners of science to unveil the way in which scientific advancement actually occurred. Chapter three argues for the role of women in democratizing science and expanding the pool from which future scientists would come through a close analysis of Jane Marcet and Agnes Clerke, members of the collective of female popularizers of science. The final chapter examines how the collective of fictional depictions of science and the scientist ultimately are part of the cultural perception of the scientist through a close reading of Shelley’s Alastor; or, the Spirit of Solitude and Wilde’s The Picture of Dorian Gray. Ultimately, The Emerging Scientist aims to recreate the way science is studied in order to generate a more comprehensive understanding of the influences on developing science and the scientist during the nineteenth century.
ContributorsSoutherly, Kaitlin (Author) / Lussier, Mark (Thesis advisor) / Broglio, Ronald (Committee member) / Bivona, Daniel (Committee member) / Arizona State University (Publisher)
Created2016