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Schroer, S.; Hölker F.; Corcho, O. |
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Title |
The impact of citizen science on research about artificial light at night |
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2016 |
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Environmental Scientist |
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25 |
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2 |
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18-24 |
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citizen science; light pollution research |
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LoNNe @ schroer @ |
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1571 |
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Grunsven van, Roy H.A.; Creemers, Raymond; Joosten, Kris; Donners Maurice; Veenendaal, Elmar M. |
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Behaviour of migrating toads under artificial lights differs from other phases of their life cycle |
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2016 |
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Amphibia-Reptilia |
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AMRE |
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animal, amphibia, Anura, fragmentation, light pollution, mitigation, phototaxis, spectra |
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LoNNe @ schroer @ |
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1568 |
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Dobler, G.; Ghandehari, M.; Koonin, S.E.; Sharma, M.S. |
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Title |
A Hyperspectral Survey of New York City Lighting Technology |
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Journal Article |
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2016 |
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Sensors (Basel, Switzerland) |
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Sensors (Basel) |
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16 |
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12 |
Pages |
2047 |
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Remote Sensing; Instrumentation; Lighting |
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Using side-facing observations of the New York City (NYC) skyline, we identify lighting technologies via spectral signatures measured with Visible and Near Infrared (VNIR) hyperspectral imaging. The instrument is a scanning, single slit spectrograph with 872 spectral channels from 0.4-1.0 mu m. With a single scan, we are able to clearly match the detected spectral signatures of 13 templates of known lighting types. However, many of the observed lighting spectra do not match those that have been measured in the laboratory. We identify unknown spectra by segmenting our observations and using Template-Activated Partition (TAP) clustering with a variety of underlying unsupervised clustering methods to generate the first empirically-determined spectral catalog of roughly 40 urban lighting types. We show that, given our vantage point, we are able to determine lighting technology use for both interior and exterior lighting. Finally, we find that the total brightness of our scene shows strong peaks at the 570 nm Na – II , 595 nm Na – II and 818 nm Na – I lines that are common in high pressure sodium lamps, which dominate our observations. |
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NYU Center for Urban Science and Progress, 1 MetroTech Center, Brooklyn, NY 11201, USA. mohit.sharma@nyu.edu |
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1424-8220 |
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PMID:27929391 |
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LoNNe @ kyba @ |
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1567 |
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Lin, C.-F.; Tsai, T.-Y.; Chen, K.-Y.; Shen, P.-C. |
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Efficient warm-white lighting using rare-earth-element-free fluorescent materials for saving energy, environment protection and human health |
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2016 |
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RSC Adv. |
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RSC Adv. |
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6 |
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113 |
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111959-111965 |
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Keywords |
Lighting |
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Solid-state white light emission is important for energy saving, but currently it is mainly based on environmentally unfriendly rare-earth doped phosphors or cadmium-containing quantum dots. Here, we explore an environmentally friendly approach for efficient white light emission based on ZnSe:Mn nanoparticles without rare-earth or cadmium elements. The emission is composed of a broad green-orange spectral band (525–650 nm) with the peak located at 578 nm and the color temperature is low, so it is particularly good for lighting at night to reduce risks to human health. Furthermore, the optimal absorption peak could be designed at 453 nm, which well matches the commercial blue-LED emission wavelength (445–470 nm). A quantum yield up to 84.5% could also be achieved. This rare-earth-element-free material opens up a new avenue for energy-saving, healthy, and environmentally benign lighting. |
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2046-2069 |
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LoNNe @ kyba @ |
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1566 |
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Cho, E.; Oh, J.H.; Lee, E.; Do, Y.R.; Kim, E.Y. |
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Cycles of circadian illuminance are sufficient to entrain and maintain circadian locomotor rhythms in Drosophila |
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2016 |
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Scientific Reports |
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Sci Rep |
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6 |
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37784 |
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Animals |
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Light at night disrupts the circadian clock and causes serious health problems in the modern world. Here, we show that newly developed four-package light-emitting diodes (LEDs) can provide harmless lighting at night. To quantify the effects of light on the circadian clock, we employed the concept of circadian illuminance (CIL). CIL represents the amount of light weighted toward the wavelengths to which the circadian clock is most sensitive, whereas visual illuminance (VIL) represents the total amount of visible light. Exposure to 12 h:12 h cycles of white LED light with high and low CIL values but a constant VIL value (conditions hereafter referred to as CH/CL) can entrain behavioral and molecular circadian rhythms in flies. Moreover, flies re-entrain to phase shift in the CH/CL cycle. Core-clock proteins are required for the rhythmic behaviors seen with this LED lighting scheme. Taken together, this study provides a guide for designing healthful white LED lights for use at night, and proposes the use of the CIL value for estimating the harmful effects of any light source on organismal health. |
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Neuroscience Graduate Program, BK21 Plus Program, Department of Biomedical Sciences, Ajou University School of Medicine, 164 Worldcup-ro, Suwon, 16499, Republic of Korea |
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2045-2322 |
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PMID:27883065; PMCID:PMC5121609 |
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LoNNe @ kyba @ |
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1565 |
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