Lillie Light | Google - Academia.edu (original) (raw)
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National Centre For Biological Sciences, Bangalore, India
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Papers by Lillie Light
The Drosophila larva modulates its pattern of locomotion when exposed to light. Modulation of loc... more The Drosophila larva modulates its pattern of locomotion when exposed to light. Modulation of locomotion can be measured as a reduction in the distance traveled and by a sharp change of direction when the light is turned on. When the light is turned off this change of direction, albeit significantly smaller than when the light is turned on, is still significantly larger than in the absence of light transition. Mutations that disrupt adult phototransduction disrupt a subset of these responses. In larvae carrying these mutations the magnitude of change of direction when the light is turned on is reduced to levels indistinguishable from that recorded when the light is turned off, but it is still significantly higher than in the absence of any light transition. Similar results were obtained when these responses were mea-sured in strains where the larval photoreceptor neurons were ablated by mutations in the glass ( gl) gene or by the targeted expression of the cell death gene head involution defective (hid). A mutation in the homeobox gene sine oculis (so) that ablates the larval visual system, or the targeted expression of the reaper (rpr) cell death gene, abolishes all responses to light detected as a change of direction. We propose the existence of an extraocular light perception that does not use the same phototransduction cascade as the adult photoreceptors. Our results indicate that this novel visual function depends on the blue-absorbing rhodopsin Rh1 and is specified by the so gene.
Applied Optics, 1987
We describe a multichannel correlator/convolver architecture utilizing an acoustooptic light modu... more We describe a multichannel correlator/convolver architecture utilizing an acoustooptic light modulator for the 1-D input channel and a magnetooptic spatial light modulator (MOSLM) for the second 2-D parallel channel. The MOSLM allows greater parallelism to be implemented into this correlator/convolver design than was previously reported. We demonstrate the implementation of 24 parallel channels with a 48 X 48 device. We present experimental data and discuss ways of increasing the number of parallel channels using commercially available MOSLMs and other previously discussed techniques such as frequency multiplexing. We show that over 2000 parallel channels are possible at 32-bit accuracy. A technique for obtaining a limited gray scale is also discussed.
Optics Letters, 1985
The potential of an extremely inexpensive liquid-crystal television (LCTV) as a two-dimensional s... more The potential of an extremely inexpensive liquid-crystal television (LCTV) as a two-dimensional spatial light modulator has been investigated. The LCTV modulates the transmission of coherent or incoherent light and can either be electronically addressed through a microcomputer or optically addressed with a TV camera. The transmission characteristics of the device have been measured, its diffraction pattern is examined, and its use as an input device for an optical correlator is tested. It is discovered that, with proper modifications, it has potential for optical-data-processing applications.
Experientia, 1980
A gynandromorphic study of the carnation-light synthetic lethal revealed a site of lethal interac... more A gynandromorphic study of the carnation-light synthetic lethal revealed a site of lethal interaction (focus) in nerve tissue. Because both the carnation and light loci are known to be active in non-nervous tissue we have interpreted our results in terms of a model which accounts for diminution of developmental potential as a result of irreversible gene repression rather than selective gene activation.
ROZDZIAŁ V POMOC I WSPARCIE DZIECI W RODZINACH W SYTUACJI KRYZYSU 1. Założenia polityki rodzinnej.
The Drosophila larva modulates its pattern of locomotion when exposed to light. Modulation of loc... more The Drosophila larva modulates its pattern of locomotion when exposed to light. Modulation of locomotion can be measured as a reduction in the distance traveled and by a sharp change of direction when the light is turned on. When the light is turned off this change of direction, albeit significantly smaller than when the light is turned on, is still significantly larger than in the absence of light transition. Mutations that disrupt adult phototransduction disrupt a subset of these responses. In larvae carrying these mutations the magnitude of change of direction when the light is turned on is reduced to levels indistinguishable from that recorded when the light is turned off, but it is still significantly higher than in the absence of any light transition. Similar results were obtained when these responses were mea-sured in strains where the larval photoreceptor neurons were ablated by mutations in the glass ( gl) gene or by the targeted expression of the cell death gene head involution defective (hid). A mutation in the homeobox gene sine oculis (so) that ablates the larval visual system, or the targeted expression of the reaper (rpr) cell death gene, abolishes all responses to light detected as a change of direction. We propose the existence of an extraocular light perception that does not use the same phototransduction cascade as the adult photoreceptors. Our results indicate that this novel visual function depends on the blue-absorbing rhodopsin Rh1 and is specified by the so gene.
Applied Optics, 1987
We describe a multichannel correlator/convolver architecture utilizing an acoustooptic light modu... more We describe a multichannel correlator/convolver architecture utilizing an acoustooptic light modulator for the 1-D input channel and a magnetooptic spatial light modulator (MOSLM) for the second 2-D parallel channel. The MOSLM allows greater parallelism to be implemented into this correlator/convolver design than was previously reported. We demonstrate the implementation of 24 parallel channels with a 48 X 48 device. We present experimental data and discuss ways of increasing the number of parallel channels using commercially available MOSLMs and other previously discussed techniques such as frequency multiplexing. We show that over 2000 parallel channels are possible at 32-bit accuracy. A technique for obtaining a limited gray scale is also discussed.
Optics Letters, 1985
The potential of an extremely inexpensive liquid-crystal television (LCTV) as a two-dimensional s... more The potential of an extremely inexpensive liquid-crystal television (LCTV) as a two-dimensional spatial light modulator has been investigated. The LCTV modulates the transmission of coherent or incoherent light and can either be electronically addressed through a microcomputer or optically addressed with a TV camera. The transmission characteristics of the device have been measured, its diffraction pattern is examined, and its use as an input device for an optical correlator is tested. It is discovered that, with proper modifications, it has potential for optical-data-processing applications.
Experientia, 1980
A gynandromorphic study of the carnation-light synthetic lethal revealed a site of lethal interac... more A gynandromorphic study of the carnation-light synthetic lethal revealed a site of lethal interaction (focus) in nerve tissue. Because both the carnation and light loci are known to be active in non-nervous tissue we have interpreted our results in terms of a model which accounts for diminution of developmental potential as a result of irreversible gene repression rather than selective gene activation.
ROZDZIAŁ V POMOC I WSPARCIE DZIECI W RODZINACH W SYTUACJI KRYZYSU 1. Założenia polityki rodzinnej.