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Bamford, S.P.; Nichol, R.C.; Baldry, I.K.; Land, K.; Lintott, C.J.; Schawinski, K.; Slosar, A.; Szalay, A.S.; Thomas, D.; Torki, M.; Andreescu, D.; Edmondson, E.M.; Miller, C.J.; Murray, P.; Raddick, M.J.; Vandenberg, J. |
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Title |
Galaxy Zoo: the dependence of morphology and colour on environment |
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Journal Article |
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2009 |
Publication |
Monthly Notices of the Royal Astronomical Society |
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393 |
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4 |
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1324-1352 |
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Remote Sensing |
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0035-8711 |
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LoNNe @ kagoburian @ |
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902 |
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Author |
Ban, Y.; Cao, C.; Shao, X. |
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Title |
Assessment of scan-angle dependent radiometric bias of Suomi-NPP VIIRS day/night band from night light point source observations |
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Journal Article |
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2015 |
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Proc. SPIE 9607, Earth Observing Systems XX, 2015 |
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960727 |
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Keywords |
Remote sensing; Suomi NPP; VIIRS DNB; calibration |
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Abstract |
The low gain stage of VIIRS Day/Night Band (DNB) on Suomi-NPP is calibrated using onboard solar diffuser. The calibration is then transferred to the high gain stage of DNB based on the gain ratio determined from data collected along solar terminator region. The calibration transfer causes increase of uncertainties and affects the accuracy of the low light radiances observed by DNB at night. Since there are 32 aggregation zones from nadir to the edge of the scan and each zone has its own calibration, the calibration versus scan angle of DNB needs to be independently assessed. This study presents preliminary analysis of the scan-angle dependence of the light intensity from bridge lights, oil platforms, power plants, and flares observed by VIIRS DNB since 2014. Effects of atmospheric path length associated with scan angle are analyzed. In addition, other effects such as light changes at the time of observation are also discussed. The methodology developed will be especially useful for JPSS J1 VIIRS due to the nonlinearity effects at high scan angles, and the modification of geolocation software code for different aggregation modes. It is known that J1 VIIRS DNB has large nonlinearity across aggregation zones, and requires new aggregation modes, as well as more comprehensive validation. |
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Univ. of Maryland, College Park, USA |
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SPIE |
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English |
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English |
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IDA @ john @ |
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1259 |
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Bapary, M.A.J.; Takano, J.-I.; Soma, S.; Sankai, T. |
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Title |
Effect of blue LED light and antioxidants potential in a somatic cell |
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Journal Article |
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Year |
2019 |
Publication |
Cell Biology International |
Abbreviated Journal |
Cell Biol Int |
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Volume |
43 |
Issue |
11 |
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1296-1306 |
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Keywords |
Cells; Biology; LED; blue light; Antioxidants; cell death |
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Abstract |
Light is an indispensable part of routine laboratory works in which conventional light is generally used. Light-emitting diodes (LEDs) have come to replace the conventional light thus could be a potent target in biomedical studies. Since blue light is a major component of visible light wavelength, in this study, using a somatic cell from African green monkey kidney, we assessed the possible consequences of blue spectra of LED light in future animal experiments and proposed a potent mitigation against light induced damages. COS-7 cells were exposed to blue LED light (450 nm) and the growth and DNA damage were assessed at different exposure times. A higher suppression in cell growth and viability was observed under a longer period of blue LED light exposure. The number of apoptotic cells increased as light exposure time was prolonged. Reactive oxygen species generation was also elevated in accordance to the extension of light exposure times. A comparison to dark-maintained cells revealed that the upregulation of ROS by blue LED light plays a significant role in causing cellular dysfunction in DNA in a time-dependent manner. In turn, antioxidant treatment has shown to improve the cell growth and viability under blue LED light conditions. This indicates that antioxidants are potential against blue LED light-induced somatic cell damage. It is expected that this study will contribute to the understanding of the basic mechanism of somatic cell death under visible light and to maximize the beneficial use of LED light in future animal experiments. |
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Tsukuba Primate Research Center, National Institutes of Biomedical Innovation, Health and Nutrition, Ibaraki, Japan |
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1065-6995 |
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PMID:30958611 |
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no |
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Call Number |
GFZ @ kyba @ |
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2328 |
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Author |
Bapary, Mohammad AJ; Amin, Md Nurul; Takeuchi, Yuki; Takemura, Akihiro |
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Title |
The stimulatory effects of long wavelengths of light on the ovarian development in the tropical damselfish, Chrysiptera cyanea |
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2011 |
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Aquaculture |
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314 |
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1-4 |
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188-192 |
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animals; fish; reproduction |
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LoNNe @ schroer @ |
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1575 |
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Author |
Bará, S. |
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Title |
Light pollution: Why should we care? |
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Journal Article |
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Year |
2014 |
Publication |
Second International Conference on Applications of Optics and Photonics Manuel Filipe P. C. Martins Costa; Rogério Nunes Nogueira Aveiro, Portugal, 2014 |
Abbreviated Journal |
Proc. SPIE 9286 |
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9286 |
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Keywords |
Society; light pollution |
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Abstract |
The historical development of lighting technologies has been characterized by what evolution theorists call 'punctuated equilibrium': a succession of long periods of stable development followed by short periods of rapid change when key technological breakthroughs give rise to new lighting paradigms. Nowadays with the massive deployment of LED-based solid state lighting systems the illumination field is undergoing one of such accelerated transformation events. In parallel, a growing body of research has unveiled some of the complex interactions between the daily cycles of light and darkness and the regulating mechanisms of individuals, populations and ecosystems, including humans. This communication addresses some of the challenges that this new situation poses for the development of sustainable lighting systems. |
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Univ. de Santiago de Compostela, Spain; salva.bara@usc.es |
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SPIE |
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English |
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English |
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IDA @ john @ |
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1133 |
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