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Author |
Matsuda, R.; Yamano, T.; Murakami, K.; Fujiwara, K. |
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Title |
Effects of spectral distribution and photosynthetic photon flux density for overnight LED light irradiation on tomato seedling growth and leaf injury |
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Journal Article |
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Year |
2016 |
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Scientia Horticulturae |
Abbreviated Journal |
Scientia Horticulturae |
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198 |
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363-369 |
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Plants |
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0304-4238 |
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LoNNe @ kyba @ |
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1387 |
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Author |
Price, B.; Baker, E. |
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Title |
NightLife: A cheap, robust, LED based light trap for collecting aquatic insects in remote areas |
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Journal Article |
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Year |
2016 |
Publication |
Biodiversity Data Journal |
Abbreviated Journal |
Bdj |
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4 |
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e7648 |
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Keywords |
Animals; Ecology; Lighting |
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Background
There are approximately one hundred thousand aquatic insect species currently known to science and this figure is likely a significant underestimation. The ecology of aquatic insect groups has been studied due to their role as bioindicators of water quality and in the case of Diptera, their role as vectors of disease. Light trapping targets emergent adults, using mercury vapour bulbs or actinic fluorescent tubes, however these light sources are unsuitable for sampling remote regions due to their power requirements, which limit their mobility. Most insects studied have three types of photoreceptors corresponding to UV, blue and green light.
New information
We describe the NightLife: a cheap, robust, portable, LED based light source which targets insect trichromatic vision, is capable of autonomous operation and is powered by a single AA battery. Field trials show that the NightLife is capable of collecting sufficient samples of 12 insect orders, including all aquatic orders commonly collected by traditional light trapping and compares favourably with actinic fluorescent tubes and white LEDs. Future development in LED technology will likely result in LEDs replacing traditional light sources for collecting insects more widely. |
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1314-2836 |
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LoNNe @ kyba @ |
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1398 |
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Author |
Hyari, K.H.; Khelifi, A.; Katkhuda, H. |
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Title |
Multiobjective Optimization of Roadway Lighting Projects |
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Journal Article |
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Year |
2016 |
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Journal of Transportation Engineering |
Abbreviated Journal |
J. Transp. Eng. |
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04016024 |
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Keywords |
Lighting; multiobjective optimization; traffic safety; road safety; lighting design; uniformity; genetic algorithm |
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Abstract |
Roadway lighting systems play a major role in maintaining nighttime traffic safety as they reduce both the number and severity of nighttime traffic accidents. While the design of roadway lighting systems involves multiple objectives, past studies have focused on optimizing only one of the multiple objectives that should be considered. This paper presents a multiobjective optimization model for roadway lighting projects that simultaneously optimizes four design objectives. The incorporated objectives are (1) maximizing the average lighting level on the road surface; (2) maximizing the lighting uniformity along the roadway; (3) minimizing the glare to road users produced by the lighting system; and (4) minimizing the cost of operating the lighting system. The model is designed and developed as a multiobjective genetic algorithm to help decision-makers in their endeavor to provide efficient roadway lighting systems that strike a balance between the four conflicting objectives. The present model considers the following six design variables: type of lighting fixture, mounting height, spacing, fixture offset, fixture’s inclination, and fixture’s rotation angle. An application example is analyzed in this paper to clarify the use of the model and display its significant features in producing better lighting arrangements for roadways. |
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Dept. of Civil Engineering, Hashemite Univ., P.O. Box 150459, Zarqa 13115, Jordan; hyari(at)hu.edu.jo |
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ASCE |
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English |
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English |
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0733-947X |
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IDA @ john @ |
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1405 |
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Author |
Meng, C.; Dou, Y. |
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Title |
Quantifying the Anthropogenic Footprint in Eastern China |
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Journal Article |
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Year |
2016 |
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Scientific Reports |
Abbreviated Journal |
Sci Rep |
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6 |
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24337 |
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Remote Sensing |
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Urban heat island (UHI) is one of the most focuses in urban climate study. The parameterization of the anthropogenic heat (AH) is crucial important in UHI study, but universal method to parameterize the spatial pattern of the AH is lacking now. This paper uses the NOAA DMSP/OLS nighttime light data to parameterize the spatial pattern of the AH. Two experiments were designed and performed to quantify the influences of the AH to land surface temperature (LST) in eastern China and 24 big cities. The annual mean heating caused by AH is up to 1 K in eastern China. This paper uses the relative LST differences rather than the absolute LST differences between the control run and contrast run of common land model (CoLM) to find the drivers. The heating effect of the anthropogenic footprint has less influence on relatively warm and wet cities. |
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Institute of Urban Meteorology, China Meteorological Administration, Beijing, 100089, China |
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English |
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2045-2322 |
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PMID:27067132 |
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LoNNe @ kyba @ |
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1415 |
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Author |
Meng, F.; Chen, D.; Xiong, W.; Tan, H.; Wang, Y.; Zhu, W.; Su, S.-J. |
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Title |
Tuning color-correlated temperature and color rendering index of phosphorescent white polymer light-emitting diodes: Towards healthy solid-state lighting |
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Journal Article |
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Year |
2016 |
Publication |
Organic Electronics |
Abbreviated Journal |
Organic Electronics |
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34 |
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18-22 |
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Keywords |
Lighting |
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We report on efficient solution-processed phosphorescent white polymer light-emitting diodes (WPLEDs) with tunable color-correlated temperature (CCT) and color rendering index (CRI), through rationally controlling the composition of the emission layer (EML) based on a near-infrared (NIR)-emitting dinuclear cyclometalated platinum (II) complex bridged with NˆS anionic ligand, named (niq)2Pt2(μ-C8PhOXT)2 (Pt-1, in which PhOXT is 5-(phenyl-1,3,4-oxadiazole)-2-thiol, niq is 1-naphthylisoquinolinato), a sky-blue emitter iridium (III) bis[(4,6-di-fluorophenyl)-pyridinato-N,C2] (picolinate) (FIrpic), and a yellow emitter bis[2-(thieno[3,2-c]pyridin-4-yl)phenyl]iridium(III)(acetylacetonato) (PO-01). One of the best three-color WPLEDs shows a CCT of 3246 K as well as an excellent high CRI of 87, which are greatly beneficial in reducing deep-blue light damage and simultaneously meet the requirement for good color reproduction. Meanwhile, the relevant WPLED also achieves a maximum current efficiency of 12.1 cd/A, corresponding to an external quantum efficiency of 10.6%. This work presents an effective approach through rational combination of sky-blue, yellow, and NIR emitters towards high-performance solution-processable WPLEDs with a physiologically-friendly CCT and a high CRI. |
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1566-1199 |
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LoNNe @ kyba @ |
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1416 |
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