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Author |
Filho, C.R.D.S.; Zullo Jr, J.; Elvidge, C. |
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Title |
Brazil's 2001 energy crisis monitored from space |
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Journal Article |
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Year |
2004 |
Publication |
International Journal of Remote Sensing |
Abbreviated Journal |
International Journal of Remote Sensing |
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25 |
Issue |
12 |
Pages |
2475-2482 |
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Keywords |
Remote Sensing; Energy |
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Abstract |
Data sensed by the US Air Force Defence Meteorological Satellite Program (DMSP) Operational Linescan System (OLS) during the years 2000 and 2001 in Brazil were tested as a tool to monitor reduction of nocturnal lighting. This particular timing was examined as the Brazilian population and industry were forced to reduce electric power consumption by 20% during 2001, in relation to 2000, for a period of several months, starting officially on 1 June 2001. Large urban agglomerates were compelled to switch off city lights by at least the same amount. The Distrito Federal (DF), including the Brazilian capital, Brasilia, was one of the primary areas where the government actively sought electric power consumption reductions. Using the DF as a study case, we demonstrate that the mean grey levels derived from averaging DMSP-OLS data acquired over urban centres appear to be a useful index to monitor relative oscillations in energy consumption. |
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0143-1161 |
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GFZ @ kyba @ |
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2362 |
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Shillo, R., & Halevy, A. H. |
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Title |
Interaction of photoperiod and temperature in flowering-control of Gypsophila paniculata L |
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Journal Article |
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Year |
1982 |
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Scientia Horticulturae |
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Volume |
16 |
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4 |
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385-393 |
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Plants |
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Long day promotes flowering of Gysophila paniculata L cultivar ‘Bristol Fairy’. Repeated treatments with GA3 or GA4 + 7 in short days did not promote flowering. The long photoperiod is effective only at relatively high temperatures. At night temperatures below 12°C, the plants remain vegetative even in long days. Efficient artificial lighting is from incandescent lamps at 60–100 lux. Fluorescent lighting (Cool-White) is not effective. Lighting of 4 hours as a night-break or at the end of the night were equally effective, but 4 hours lighting as a day-extension was less effective. Whole-night lighting promoted flowering more than any of the 4-hour lighting regimes. Cyclic lighting of one third light in each cycle promoted flowering to the same extent as continuous lighting. Light intensity during the day has a decisive effect on flower production. |
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IDA @ intern @ |
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2370 |
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Myers, L.; Christian, K.; Kirchner, R. |
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Title |
Flowering responses of 48 lines of oilseed rape (Brassica spp.) to vernalization and daylength |
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Journal Article |
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1982 |
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Australian Journal of Agricultural Research |
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Aust. J. Agric. Res. |
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33 |
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6 |
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927 |
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Plants |
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Forty-eight lines of Brassica spp, of diverse origins were grown in the glasshouse either under natural daylengths or daylengths extended to 16 h by artificial illumination. Plants were either unvernalized or had been subjected to 6 weeks at 8¦C day and 6¦C night temperatures as seedlings. Lines could be classified into two major groups, according to whether or not vernalization or long photoperiods were essential for 50% flowering within 21 weeks. In six lines, both vernalization and long days were essential for prompt flowering, while only five lines did not respond to either treatment. Strong interactions between lines and treatments were found in the number of leaves and subtended buds at flowering. The results show that a wide range of responses is obtainable from material currently available, offering considerabk, scope for adaptation to different environments. |
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0004-9409 |
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IDA @ intern @ |
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2369 |
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Kyba, C.C.M.; Giuliani, G.; Franziskakis, F.; Tockner, K.; Lacroix, P. |
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Title |
Artisanal and Small-Scale Mining Sites in the Democratic Republic of the Congo Are Not Associated with Nighttime Light Emissions |
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Journal Article |
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2019 |
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J |
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J |
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2 |
Issue |
2 |
Pages |
152-161 |
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Remote Sensing |
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Maintaining records of artisanal and small-scale mining sites in developing countries requires considerable effort, so it would be beneficial if Earth observation data from space could assist in the identifying and monitoring of such sites. Artificial light emissions are common at industrial-scale mining sites and have been associated with small-scale illegal mining in some contexts. Here, we examine whether known artisanal and small-scale mining sites in the Democratic Republic of the Congo (DRC) are associated with observations of night light emissions by the Visible Infrared Imaging Radiometer Suite Day/Night Band (DNB). Light emissions from the mining sites were not observed: the radiance observed from the sites was near zero and nearly identical to that observed for a set of randomly-chosen locations in the same region. While it is the case that DNB night lights’ products provide useful data in other resource extraction contexts, they do not appear to be useful for identifying artisanal mining sites in the DRC. |
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2571-8800 |
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GFZ @ kyba @ |
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2295 |
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Author |
Tinus, R. W. |
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Title |
Effects of Extended Photoperiod on Southern Rocky Mountain Engelmann Spruce and Douglas-fir |
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1981 |
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Tree Planters' Notes |
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32 |
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4 |
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Four sources of Engelmann spruce and two of Douglas-fir were grown under eight different extended photoperiod regimes. Incandescent light 1 minute of every 15 at night at 270 lux was more effective than continuous incandescent at 1200 lux or intermittent fluorescent at 950 lux at preventing bud dormancy and maintaining continuous height growth. |
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IDA @ intern @ |
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2368 |
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