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"Kendall, Stuart"
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Nonlocal phase-change metaoptics for reconfigurable nonvolatile image processing
The next generation of smart imaging and vision systems will require compact and tunable optical computing hardware to perform high-speed and low-power image processing. These requirements are driving the development of computing metasurfaces to realize efficient front-end analog optical pre-processors, especially for edge detection capability. Yet, there is still a lack of reconfigurable or programmable schemes, which may drastically enhance the impact of these devices at the system level. Here, we propose and experimentally demonstrate a reconfigurable flat optical image processor using low-loss phase-change nonlocal metasurfaces. The metasurface is configured to realize different transfer functions in spatial frequency space, when transitioning the phase-change material between its amorphous and crystalline phases. This enables edge detection and bright field imaging modes on the same device. The metasurface is compatible with a large numerical aperture of ~0.5, making it suitable for high resolution coherent optical imaging microscopy. The concept of phase-change reconfigurable nonlocal metasurfaces may enable emerging applications of artificial intelligence-assisted imaging and vision devices with switchable multitasking.
Journal Article
Poet, Actor, Spectator
Eshleman's subject is not cave painting per se but rather the imagination that is recorded in cave wall imagery (xi). Because he tracks this \"Paleolithic imagination\" primarily through the roots of his own experience and sensibility, his subject is also his subjectivity. (Here Eshleman owes these ideas to James Hillman's essay \"The Dream and the Underworld\" and Norman O. Brown's argument from \"Fulfillment,\" chapter eight of Love's Body.) The underworld is secondly all that has been repressed or rejected from human psychology, experience, and history: unacceptable acts and urges, animal instincts, the extinction of species and potential extinction of the human race through ecological disaster.
Journal Article
Stewart Brand
Stewart Brand is arguably best known as the founder of the Whole Earth Catalog in the 1960s, but he's been an activist for environmental and related causes for over forty years. An interview with Brand is presented.
Journal Article
Nonlocal phase-change metaoptics for reconfigurable nonvolatile image processing
The next generation of smart imaging and vision systems will require compact and tunable optical computing hardware to perform high-speed and low-power image processing. These requirements are driving the development of computing metasurfaces to realize efficient front-end analog optical pre-processors, especially for edge-detection capability. Yet, there is still a lack of reconfigurable or programmable schemes, which may drastically enhance the impact of these devices at the system level. Here, we propose and experimentally demonstrate a reconfigurable flat optical image processor using low-loss phase-change nonlocal metasurfaces. The metasurface is configured to realize different transfer functions in spatial frequency space, when transitioning the phase-change material between its amorphous and crystalline phases. This enables edge detection and bright-field imaging modes on the same device. The metasurface is compatible with a large numerical aperture of ~0.5, making it suitable for high resolution coherent optical imaging microscopy. The concept of phase-change reconfigurable nonlocal metasurfaces may enable emerging applications of artificial intelligence-assisted imaging and vision devices with switchable multitasking.
Paper
Nonlocal phase-change metaoptics for reconfigurable nonvolatile image processing
The next generation of smart imaging and vision systems will require compact and tunable optical computing hardware to perform high-speed and low-power image processing. These requirements are driving the development of computing metasurfaces to realize efficient front-end analog optical pre-processors, especially for edge-detection capability. Yet, there is still a lack of reconfigurable or programmable schemes, which may drastically enhance the impact of these devices at the system level. Here, we propose and experimentally demonstrate a reconfigurable flat optical image processor using low-loss phase-change nonlocal metasurfaces. The metasurface is configured to realize different transfer functions in spatial frequency space, when transitioning the phase-change material between its amorphous and crystalline phases. This enables edge detection and bright-field imaging modes on the same device. The metasurface is compatible with a large numerical aperture of ~0.5, making it suitable for high resolution coherent optical imaging microscopy. The concept of phase-change reconfigurable nonlocal metasurfaces may enable emerging applications of artificial intelligence-assisted imaging and vision devices with switchable multitasking.
Paper
Implicating others: Autobiography as activism in Georges Bataille and William S. Burroughs
Georges Bataille (1897–1962) and William S. Burroughs (1914–1997) utilized methodologies rooted in modernist collage as a means of attacking the structures of recognition and identification on which subjectivity, in their view, is based. Central to their theory and practice is the view that the human form is something that must be radically assaulted. Significantly, both avant-gardists concentrated their assaults on images of themselves and did so in such a way as to implicate their readers into a process of self-modification that is in no way distinction from social modification. Part one examines several major theories of autobiography and of avant-gardism. Herein avant-gardism refers to a mode of aesthetic activism in which an artist uses art as a means of active engagement with culture as a historical process. On the side of autobiography, Serge Doubrovsky's concept of “autofiction”—a mode of autobiography in which the self is actively created—is considered particularly relevant to this study. After contextualizing Bataille's turn from political avant-gardism to autobiographical avant-gardism in 1939, part two outlines the mode of experience which is the central figure of Bataille's autobiographical activism and discuss this mode as a response to and critique of the utilitarian models of physics, history, and consciousness developed by René Descartes and G. W. F. Hegel. After extracting a method of autobiographical meditation from Bataille's writings and practices, demonstrate this method as it functions in the texts of La Somme athéologique . After contextualizing Burroughs's work within the history of the avant-garde and surveying several trends in its critical appropriation, part three elaborates Burroughs's basic philosophical position, that the human form as we know it is the product of a mutation caused by a radioactive virus. For Burroughs, freedom from the human condition will require further mutation, effected by adopting the methods of the virus. After outlining Burroughs's theory and practice of viral writing, viral sounds and recordings, and viral images, I demonstrate these practices as they appear in Burroughs's autobiographical activism.
Dissertation