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Author Wu, J.; He, S.; Peng, J.; Li, W.; Zhong, X. url  doi
openurl 
  Title Intercalibration of DMSP-OLS night-time light data by the invariant region method Type Journal Article
  Year 2013 Publication International Journal of Remote Sensing Abbreviated Journal International Journal of Remote Sensing  
  Volume 34 Issue (up) 20 Pages 7356-7368  
  Keywords DMSP-OLS; remote sensing; light at night  
  Abstract DMSP-OLS (Defense Meteorological Satellite Program Operational Linescan System) night-time light data can accurately reflect the scope and intensity of human activities. However, the raw data cannot be used directly for temporal analyses due to the lack of inflight calibration. There are three problems that should be addressed in intercalibration. First, because of differences between sensors, the data are not identical even when obtained in the same year. Second, different acquisition times may lead to random or systematic fluctuations in the data obtained by satellites in different orbits. Third, a pixel saturation phenomenon also exists in the urban centres of the image. Therefore, an invariant region method was used in this article, and the relative radiometric calibration and saturation correction achieved the desired results. In the meantime, intercalibration models for each satellite year of DMSP-OLS night-time light data were produced. Finally, intercalibration accuracy was evaluated, and the intercalibration results were tested with the corresponding gross domestic product (GDP) data.  
  Address School of Urban Planning and Design , Peking University , Shenzhen , 518055 , China  
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  ISSN 0143-1161 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number IDA @ john @ Serial 203  
Permanent link to this record
 

 
Author Jou, J.-H.; Hsieh, C.-Y.; Tseng, J.-R.; Peng, S.-H.; Jou, Y.-C.; Hong, J.H.; Shen, S.-M.; Tang, M.-C.; Chen, P.-C.; Lin, C.-H. url  doi
openurl 
  Title Candle Light-Style Organic Light-Emitting Diodes Type Journal Article
  Year 2013 Publication Advanced Functional Materials Abbreviated Journal Adv. Funct. Mater.  
  Volume 23 Issue (up) 21 Pages 2750-2757  
  Keywords organic light emitting diodes; candle light; firelight; OLED; CRI; color rendition  
  Abstract In response to the call for a physiologically-friendly light at night that shows low color temperature, a candle light-style organic light emitting diode (OLED) is developed with a color temperature as low as 1900 K, a color rendering index (CRI) as high as 93, and an efficacy at least two times that of incandescent bulbs. In addition, the device has a 80% resemblance in luminance spectrum to that of a candle. Most importantly, the sensationally warm candle light-style emission is driven by electricity in lieu of the energy-wasting and greenhouse gas emitting hydrocarbon-burning candles invented 5000 years ago. This candle light-style OLED may serve as a safe measure for illumination at night. Moreover, it has a high color rendering index with a decent efficiency.  
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  ISSN 1616301X ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number IDA @ john @ Serial 284  
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Author Warrant, E.J.; Johnsen, S. url  doi
openurl 
  Title Vision and the light environment Type Journal Article
  Year 2013 Publication Current Biology : CB Abbreviated Journal Curr Biol  
  Volume 23 Issue (up) 22 Pages R990-4  
  Keywords photobiology; animals; physiology of vision; photodetection  
  Abstract Almost all animals, no matter how humble, possess eyes. Only those that live in total darkness, such as in a pitch-dark cave, may lack eyes entirely. Even at tremendous depths in the ocean — where the only lights that are ever seen are rare and fitful sparks of bioluminescence — most animals have eyes, and often surprisingly well-developed eyes. And despite their diversity (there are currently ten generally recognised optical types) all eyes have evolved in response to the remarkably varied light environments that are present in the habitats where animals live. Variations in the intensity of light, as well as in its direction, colour and dominant planes of polarisation, have all had dramatic effects on visual evolution. In the terrestrial habitats where we ourselves have most recently evolved, the light environment can vary quite markedly from day to night and from one location to another. In aquatic habitats, this variation can be orders of magnitude greater. Even though the ecologies and life histories of animals have played a major role in visual evolution, it is arguably the physical limitations imposed on photodetection by a given habitat and its light environment that have defined the basic selective pressures that have driven the evolution of eyes.  
  Address Department of Biology, University of Lund, Solvegatan 35, S-22362 Lund, Sweden. Electronic address: Eric.Warrant@biol.lu.se  
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  Language English Summary Language Original Title  
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  Series Volume Series Issue Edition  
  ISSN 0960-9822 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:24262832 Approved no  
  Call Number IDA @ john @ Serial 235  
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Author Min, B.; Gaba, K.M.; Sarr, O.F.; Agalassou, A. url  doi
openurl 
  Title Detection of rural electrification in Africa using DMSP-OLS night lights imagery Type Journal Article
  Year 2013 Publication International Journal of Remote Sensing Abbreviated Journal International Journal of Remote Sensing  
  Volume 34 Issue (up) 22 Pages 8118-8141  
  Keywords Remote Sensing  
  Abstract We report on the first systematic ground-based validation of the US Air Force Defense Meteorological Satellite Program’s Operational Linescan System (DMSP-OLS) night lights imagery to detect rural electrification in the developing world. Drawing upon a unique survey of villages in Senegal and Mali, this study compares night-time light output from the DMSP-OLS against ground-based survey data on electricity use in 232 electrified villages and additional administrative data on 899 unelectrified villages. The analysis reveals that electrified villages are consistently brighter than unelectrified villages across annual composites, monthly composites, and a time series of nightly imagery. Electrified villages appear brighter because of the presence of streetlights, and brighter villages tend to have more streetlights. By contrast, the correlation of light output with household electricity use and access is low. We further demonstrate that a detection algorithm using data on night-time light output and the geographic location of settlements can accurately classify electrified villages. This research highlights the potential to use night lights imagery for the planning and monitoring of ongoing efforts to connect the 1.4 billion people who lack electricity around the world.  
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  ISSN 0143-1161 ISBN Medium  
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  Notes Approved no  
  Call Number LoNNe @ christopher.kyba @ Serial 484  
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Author Liao, L.B.; Weiss, S.; Mills, S.; Hauss, B. url  doi
openurl 
  Title Suomi NPP VIIRS day-night band on-orbit performance: VIIRS DAY-NIGHT BAND PERFORMANCE Type Journal Article
  Year 2013 Publication Journal of Geophysical Research: Atmospheres Abbreviated Journal J. Geophys. Res. Atmos.  
  Volume 118 Issue (up) 22 Pages 12,705-12,718  
  Keywords Remote Sensing  
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  ISSN 2169897X ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number LoNNe @ kagoburian @ Serial 956  
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