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Author Mejias, A. L., Calrisle, M. C., & Bender, M. J.
Title Investigating the influence of small-scale light pollution on bat activity Type Journal Article
Year 2019 Publication Georgia Journal of Science Abbreviated Journal (up)
Volume 77 Issue 1 Pages
Keywords Animals
Abstract Large-scale light pollution is widely documented to have deleterious effects on many nocturnal species, including bats. However, the full extent of these effects, and how they scale with light size and intensity, are not well documented. Previous studies investigating the influence of lights on bat activity have typically concentrated on large-scale light pollution, but smaller scale pollution is pervasive and actions taken by individuals may mitigate any negative effects. Our specific objective for this study is to determine what, if any, effects residential-type security lights have on bat activity in habitats with otherwise limited anthropogenic sources of light. To achieve this objective, we used acoustic detectors to measure bat activity both with and without the presence of an artificial light source. Using this general approach, we conducted a pilot study to refine field methodology between October and November of 2018 in Hall and Jackson counties. Preliminary data were inconclusive, most likely because of overall low bat activity associated with this time of the year, but our methods showed promise as an approach to evaluate the influence light on bat activity. The study will resume in the upcoming spring and summer of 2019, and during this period of increased bat activity, we will attempt to quantify the effects of small-scale light pollution on native bat populations in northern Georgia.
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Call Number IDA @ intern @ Serial 2356
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Author Guilford, T., Padget, O., Bond, S., & Syposz, M. M.
Title Light pollution causes object collisions during local nocturnal manoeuvring flight by adult Manx Shearwaters Puffinus puffinus Type Journal Article
Year 2019 Publication Seabird Abbreviated Journal (up)
Volume 31 Issue Pages 48-55
Keywords Animals
Abstract Understanding the detrimental effects of anthropogenic light on nocturnally mobile animals is a long-standing problem in conservation biology. Seabirds such as shearwaters and petrels can be especially affected, perhaps because of their propensity to fly close to the surface, making them vulnerable to encountering anthropogenic light sources. We investigated the influence of light pollution on adult Manx Shearwaters Puffinus puffinus at close range in foggy conditions. We recorded collisions with a building at a breeding colony for six consecutive pairs of intervals in which the house lights were left on as normal for 135 seconds, then turned off for 135 seconds. The relationship between lighting condition and collision frequency was highly significant, with a collision rate in the presence of lighting around 25 times that in its absence. Our results show that birds were clearly affected by the lights, by being either directly attracted, or disorientated during flight close to the structure. This could have been due to the light source itself, or an indirect effect of the all-round reflective glow in the fog perhaps interfering with visual or magnetic control inputs on both sides of the bird simultaneously. Our results suggest a mechanism by which the screening of artificial lights close to shearwater breeding areas, at least during foggy nights, could lead to improved welfare and survival at breeding colonies.
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Call Number IDA @ intern @ Serial 2357
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Author Gu, Y., Uprety, S., Blonski, S., Zhang, B., & Cao, C.
Title Improved algorithm for determining the Visible Infrared Imaging Radiometer Suite Day/Night Band high-gain stage dark offset free from light contamination Type Journal Article
Year 2019 Publication Applied Optics Abbreviated Journal (up)
Volume 58 Issue 6 Pages 1400-1407
Keywords Remote Sensing; Instrumentation
Abstract Dark offset is one of the key parameters for Visible Infrared Imaging Radiometer Suite (VIIRS) Day/Night Band (DNB) high-gain stage (HGS) radiometric calibration, whose accuracy strongly impacts applications of DNB low-light detection for Earth observation at nighttime. Currently, DNB observation of the VIIRS onboard calibrator blackbody (OBCBB) view, together with its observation of deep space during the spacecraft pitch maneuver performed early in the mission, has been used to compute the HGS dark offset continuously. However, the relationship between the DNB OBCBB data and the Earth view (EV) data is unclear due to electronic timing differences between these two views. It is questionable whether the DNB OBCBB data can monitor the EV HGS dark offset change. Through comprehensive analysis of the DNB OBCBB data and EV data acquired from the monthly special acquisitions known as the VIIRS recommended operating procedures (VROPs), we have shown that the OBCBB data can only track the dark current component of the DNB HGS EV dark offset, instead of the total dark offset. The DNB observation of deep space during the spacecraft pitch maneuver was also contaminated by starlight. With such background, in this paper we propose an improved algorithm for determining the DNB HGS dark offset. By combined use of the DNB OBCBB data and the DNB VROP data, the generated DNB HGS dark offset is both free from light contamination and capable of tracking continuous drift. The improved algorithm could potentially improve the DNB radiometric performance at low radiance level. Our results provide a solid theoretical basis for dark offset calibration of the VIIRS DNB onboard Suomi National Polar-Orbiting Partnership satellite and the following Joint Polar Satellite System satellites.
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Call Number IDA @ intern @ Serial 2358
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Author Kim, T. Y., & Park, N. H.
Title Design of Path Prediction Smart Street Lighting System on the Internet of Things Type Journal Article
Year 2019 Publication Journal of the Chosun Natural Science Abbreviated Journal (up)
Volume 12 Issue 1 Pages 14-19
Keywords Lighting
Abstract In this paper, we propose a system for controlling the brightness of street lights by predicting pedestrian paths, identifying the position of pedestrians with motion sensing sensors and obtaining motion vectors based on past walking directions, then predicting pedestrian paths through the route prediction smart street lighting system. In addition, by using motion vector data, the pre-treatment process using linear interpolation method and the fuzzy system and neural network system were designed in parallel structure to increase efficiency and the rough set was used to correct errors. It is expected that the system proposed in this paper will be effective in securing the safety of pedestrians and reducing light pollution and energy by predicting the path of pedestrians in the detection of movement of pedestrians and in conjunction with smart street lightings.
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Call Number IDA @ intern @ Serial 2359
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Author Kadman-Zahavi, A., & Ephrat, E.
Title The efficiency of different light sources in inducing spray carnation flowering Type Journal Article
Year 1982 Publication Scientia Horticulturae Abbreviated Journal (up)
Volume 18 Issue Pages 159--167
Keywords Plants
Abstract Light from Gro-lux fluorescent lamps, as a 4-h night break, was found to be more effective than incandescent light in promoting spray carnation flowering under natural daylight conditions. When the illuminations were applied for 4 h in the middle of the night, the effectiveness of a certain amount of radiant energy from incandescent light was found to be the same whether applied as intermittent or as continuous illumination.
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Call Number IDA @ intern @ Serial 2371
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