| Records |
| Author |
Huang, Z.; Liu, Q.; Westland, S.; Pointer, M.; Luo, M.R.; Xiao, K. |
| Title |
Light dominates colour preference when correlated colour temperature differs |
Type |
Journal Article |
| Year |
2018 |
Publication |
Lighting Research & Technology |
Abbreviated Journal |
Lighting Research & Technology |
Volume  |
50 |
Issue |
7 |
Pages |
995-1012 |
| Keywords |
Vision; Lighting |
| Abstract |
Colour preference for lighting is generally influenced by three kinds of contextual factors, the light, the object and the observer. In this study, a series of psychophysical experiments were conducted to investigate and compare the effect of certain factors on colour preference, including spectral power distribution of light, lighting application, observers’ personal colour preference, regional cultural difference and gender difference. LED lights with different correlated colour temperatures were used to illuminate a wide selection of objects. Participant response was quantified by a 7-point rating method or a 5-level ranking method. It was found that the preferred illumination for different objects exhibited a similar trend and that the influence of light was significantly stronger than that of other factors. Therefore, we conclude that the light itself (rather than, e.g. the objects that are viewed) is the most crucial factor for predicting which light, among several candidates with different correlated colour temperatures, an observer will prefer. In addition, some of the gamut-based colour quality metrics correlated well with the participants’ response, which corroborates the view that colour preference is strongly influenced by colour saturation. The familiarity of the object affects the ratings for each experiment while the colour of the objects also influences colour preference. |
| Address |
School of Printing and Packaging, Wuhan University, Luoyu Road 129, Wuhan, China; liuqiang(at)whu.edu.cn |
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| Publisher |
SAGE |
Place of Publication |
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| Language |
English |
Summary Language |
English |
Original Title |
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Series Issue |
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Edition |
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| ISSN |
1477-1535 |
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| Call Number |
IDA @ john @ |
Serial |
2256 |
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| Author |
Eriksen, A.; Wabakken, P. |
| Title |
Activity patterns at the Arctic Circle: nocturnal eagle owls and interspecific interactions during continuous midsummer daylight |
Type |
Journal Article |
| Year |
2018 |
Publication |
Journal of Avian Biology |
Abbreviated Journal |
J Avian Biol |
| Volume |
49 |
Issue |
7 |
Pages |
e01781 |
| Keywords |
Animals |
| Abstract |
Circadian rhythms result from adaptations to biotic and abiotic environmental conditions that cycle through the day, such as light, temperature, or temporal overlap between interacting species. At high latitudes, close to or beyond the polar circles, uninterrupted midsummer daylight may pose a challenge to the circadian rhythms of otherwise nocturnal species, such as eagle owls Bubo bubo. By non‐invasive field methods, we studied eagle owl activity in light of their interactions with their main prey the water vole Arvicola amphibius, and their competitor the white‐tailed eagle Haliaeetus albicilla during continuous midsummer daylight on open, treeless islands in coastal Northern Norway. We evaluated circadian rhythms, temporal overlap, exposure, and spatial distribution. The owls maintained a nocturnal activity pattern, possibly because slightly dimmer light around midnight offered favourable hunting conditions. The eagles were active throughout the 24‐hour period as opposed to the strictly diurnal rhythm reported elsewhere, thus increasing temporal overlap and the potential for interference competition between the two avian predators. This may indicate an asymmetry, with the owls facing the highest cost of interference competition. The presence of eagles combined with constant daylight in this open landscape may make the owls vulnerable to interspecific aggression, and contrary to the available literature, eagle owls rarely exposed themselves visually during territorial calls, possibly to avoid detection by eagles. We found indications of spatial segregation between owls and eagles reflecting differences in main prey, possibly in combination with habitat‐mediated avoidance. Eagle owl vocal activity peaked in the evening before a nocturnal peak in visual observations, when owls were active hunting, consistent with the hypothesis of a dusk chorus in nocturnal bird species. The owls may have had to trade‐off between calling and foraging during the few hours around midnight when slightly dimmer light reduced the detection risk while also providing better hunting conditions. |
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Edition |
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| ISSN |
0908-8857 |
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Approved |
no |
| Call Number |
GFZ @ kyba @ |
Serial |
1881 |
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| Author |
Uysal, C.; Maktav, D.; Small, C. |
| Title |
Mapping Urban Growth and Its Relation to Seismic Hazards in Istanbul |
Type |
Journal Article |
| Year |
2018 |
Publication |
Journal of the Indian Society of Remote Sensing |
Abbreviated Journal |
J Indian Soc Remote Sens |
| Volume |
46 |
Issue |
8 |
Pages |
1307-1322 |
| Keywords |
Remote Sensing |
| Abstract |
In Istanbul, one of the most densely populated cities of Turkey, the population has grown rapidly over the last 30 years. In addition to being one of the rapidly flourishing cities in Europe, the city is positioned on the seismically active North Anatolian Fault (NAF). The form and rate of Istanbul’s fast urban growth has serious implications for seismic hazards. There have been some studies to map lateral urban growth for the city but they do not give satisfactory information about vertical urban growth and seismic hazards. We use DMSP night lights and Landsat data to map changes in land cover-land use in and around the city since 1984, and determine relations of these changes with the NAF. Changes in land use and intensity of development are identified by changes in night light brightness while changes in land cover are identified by changes in land surface reflectance. Aggregate changes in reflectance are represented as changes in subpixel mixtures of the most functionally and spectrally distinct spectral endmembers of land cover. Using standardized global endmembers, SVD composite images were produced for 1984, 2000 and 2011 and fraction change (δSVD) maps were produced for the decadal intervals. The results show that most of the urban expansion has occurred near the NAF. This has serious implications for seismic hazards in the future if the progression of large earthquakes continues to move westward toward the city. |
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English |
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Edition |
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| ISSN |
0255-660X |
ISBN |
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Approved |
no |
| Call Number |
NC @ ehyde3 @ |
Serial |
2078 |
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| Author |
Cao, Y.; Zhang, J.; Yang, M.; Guo, B.; Liu, M.; Yang, L.; Qu, J.; Gao, P. |
| Title |
Analysis of Lighting Changes in the Tourist City Edogawa Using Nighttime Light Data |
Type |
Journal Article |
| Year |
2018 |
Publication |
Journal of the Indian Society of Remote Sensing |
Abbreviated Journal |
J Indian Soc Remote Sens |
| Volume |
46 |
Issue |
10 |
Pages |
1617-1623 |
| Keywords |
Remote Sensing |
| Abstract |
When assessing remote sensing data, nighttime light data have shortcomings that can be attributed to sensor limitations and the influence of the natural environment. Signal leakage errors in nighttime light data were identified in this study. A regression model was created to reduce signal leakage error by selecting sampling points in coastal area. Lighting variations in Edogawa between 2008 and 2013 were compared based on the Defense Meteorological Satellite Program’s nighttime light data. The lighting variation characteristics in Edogawa from 1992 to 2012 at 5-year intervals were also analyzed. The results show that the 2002 FIFA World Cup held in Japan led Edogawa’s light digital number values to peak in 2002. The annual Edogawa lighting changes from 2007 to 2013 were also explored. The 2008 global financial crisis led to the lowest compounded night light index and average digital number in Edogawa during these 7 years. |
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English |
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0255-660X |
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no |
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NC @ ehyde3 @ |
Serial |
2079 |
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| Author |
Pan, J.; Hu, Y. |
| Title |
Spatial Identification of Multi-dimensional Poverty in Rural China: A Perspective of Nighttime-Light Remote Sensing Data |
Type |
Journal Article |
| Year |
2018 |
Publication |
Journal of the Indian Society of Remote Sensing |
Abbreviated Journal |
J Indian Soc Remote Sens |
| Volume |
46 |
Issue |
7 |
Pages |
1093-1111 |
| Keywords |
Remote sensing |
| Abstract |
Poverty has emerged as one of the chronic dilemmas facing the development of human society during the twenty first century. Accurately identifying regions of poverty could lead to more effective poverty-alleviation programs. This study used a new type of remote-sensing data, NPP-VIIRS, to locate poverty-stricken areas based on nighttime light, taking Chongqing Municipality as a sample, and constructed a multidimensional poverty index (MPI) system, guided by a well-known and widely used conceptual framework of sustainable livelihood. A regression model was constructed and results were correlated with those using the average nighttime light index. The model was then tested on Shaanxi Province, and average relative error of the estimated MPI was only 11.12%. These results showed that multidimensional poverty had a high spatial concentration effect at the regional scale. We then applied the index nationwide, at the county scale, analyzing 2852 counties, which we divided into seven classifications, based on the MPI: extremely low, low, relatively low, medium, relatively high, high, and extremely high. Eight hundred forty-eight counties in 26 provinces were identified as multidimensionally poor. Among these, 254 were absolutely poor counties and 543 were relatively poor counties; 195 of these are not on the list of poverty-stricken counties as identified by income levels alone. By improving the accuracy of targeting, this method of identifying multidimensional poverty areas could help the Chinese government improve the effectiveness of poverty reduction strategies, and it could also be used as a reference for other countries or regions that seek to target poor areas that suffer multidimensional deprivation. |
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English |
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0255-660X |
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no |
| Call Number |
NC @ ehyde3 @ |
Serial |
2095 |
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