| Records |
| Author |
Tripathy, B.R.; Sajjad, H.; Elvidge, C.D.; Ting, Y.; Pandey, P.C.; Rani, M.; Kumar, P. |
| Title |
Modeling of Electric Demand for Sustainable Energy and Management in India Using Spatio-Temporal DMSP-OLS Night-Time Data |
Type |
Journal Article |
| Year |
2018 |
Publication |
Environmental Management |
Abbreviated Journal |
Environ Manage |
| Volume |
61 |
Issue |
4 |
Pages |
615-623 |
| Keywords |
Remote Sensing |
Abstract  |
Changes in the pattern of electric power consumption in India have influenced energy utilization processes and socio-economic development to greater extent during the last few decades. Assessment of spatial distribution of electricity consumption is, thus, essential for projecting availability of energy resource and planning its infrastructure. This paper makes an attempt to model the future electricity demand for sustainable energy and its management in India. The nighttime light database provides a good approximation of availability of energy. We utilized defense meteorological satellite program-operational line-scan system (DMSP-OLS) nighttime satellite data, electricity consumption (1993-2013), gross domestic product (GDP) and population growth to construct the model. We also attempted to examine the sensitiveness of electricity consumption to GDP and population growth. The results revealed that the calibrated DMSP and model has provided realistic information on the electric demand with respect to GDP and population, with a better accuracy of r (2) = 0.91. The electric demand was found to be more sensitive to GDP (r = 0.96) than population growth (r = 0.76) as envisaged through correlation analysis. Hence, the model proved to be useful tool in predicting electric demand for its sustainable use and management. |
| Address |
Department of Geography, Jamia Millia Islamia, New Delhi, 110025, India. pavan.jamia@gmail.com |
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English |
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0364-152X |
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| Notes |
PMID:29282533 |
Approved |
no |
| Call Number |
GFZ @ kyba @ |
Serial |
2484 |
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McGlashan, E.M.; Poudel, G.R.; Vidafar, P.; Drummond, S.P.A.; Cain, S.W. |
| Title |
Imaging Individual Differences in the Response of the Human Suprachiasmatic Area to Light |
Type |
Journal Article |
| Year |
2018 |
Publication |
Frontiers in Neurology |
Abbreviated Journal |
Front. Neurol. |
| Volume |
9 |
Issue |
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Pages |
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| Keywords |
Human Health |
| Abstract |
Circadian disruption is associated with poor health outcomes, including sleep and mood disorders. The suprachiasmatic nucleus (SCN) of the anterior hypothalamus acts as the master biological clock in mammals, regulating circadian rhythms throughout the body. The clock is synchronized to the day/night cycle via retinal light exposure. The BOLD-fMRI response of the human suprachiasmatic area to light has been shown to be greater in the night than in the day, consistent with the known sensitivity of the clock to light at night. Whether the BOLD-fMRI response of the human suprachiasmatic area to light is related to a functional outcome has not been demonstrated. In a pilot study (n = 10), we investigated suprachiasmatic area activation in response to light in a 30 s block-paradigm of lights on (100 lux) and lights off (< 1 lux) using the BOLD-fMRI response, compared to each participant's melatonin suppression response to moderate indoor light (100 lux). We found a significant correlation between activation in the suprachiasmatic area in response to light in the scanner and melatonin suppression, with increased melatonin suppression being associated with increased suprachiasmatic area activation in response to the same light level. These preliminary findings are a first step toward using imaging techniques to measure individual differences in circadian light sensitivity, a measure that may have clinical relevance in understanding vulnerability in disorders that are influenced by circadian disruption. |
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1664-2295 |
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no |
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NC @ ehyde3 @ |
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2114 |
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| Author |
Abbott, S.M.; Malkani, R.G.; Zee, P.C. |
| Title |
Circadian disruption and human health: A bidirectional relationship |
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Journal Article |
| Year |
2018 |
Publication |
The European Journal of Neuroscience |
Abbreviated Journal |
Eur J Neurosci |
| Volume |
in press |
Issue |
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Pages |
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| Keywords |
Human Health; Review |
| Abstract |
Circadian rhythm disorders have been classically associated with disorders of abnormal timing of the sleep-wake cycle, however circadian dysfunction can play a role in a wide range of pathology, ranging from the increased risk for cardiometabolic disease and malignancy in shift workers, prompting the need for a new field focused on the larger concept of circadian medicine. The relationship between circadian disruption and human health is bidirectional, with changes in circadian amplitude often preceding the classical symptoms of neurodegenerative disorders. As our understanding of the importance of circadian dysfunction in disease grows, we need to develop better clinical techniques for identifying circadian rhythms and also develop circadian based strategies for disease management. Overall this review highlights the need to bring the concept of time to all aspects of medicine, emphasizing circadian medicine as a prime example of both personalized and precision medicine. |
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Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois |
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English |
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0953-816X |
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PMID:30549337 |
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no |
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GFZ @ kyba @ |
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2154 |
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Cleary-Gaffney, M.; Coogan, A.N. |
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Limited evidence for affective and diurnal rhythm responses to dim light-at-night in male and female C57Bl/6 mice |
Type |
Journal Article |
| Year |
2018 |
Publication |
Physiology & Behavior |
Abbreviated Journal |
Physiol Behav |
| Volume |
189 |
Issue |
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Pages |
78-85 |
| Keywords |
Animals |
| Abstract |
Circadian rhythms are recurring patterns in a range of behavioural, physiological and molecular parameters that display periods of near 24h, and are underpinned by an endogenous biological timekeeping system. Circadian clocks are increasingly recognised as being key for health. Environmental light is the key stimulus that synchronises the internal circadian system with the external time cues. There are emergent health concerns regarding increasing worldwide prevalence of electric lighting, especially man-made light-at-night, and light's impact on the circadian system may be central to these effects. A number of previous studies have demonstrated increased depression-like behaviour in various rodent experimental models exposed to dim light-at-night. In this study we set out to study the impact of dim light-at-night on circadian and affective behaviours in C57Bl/6 mice. We set out specifically to examine the impact of sex on light at night's effects, as well as the impact of housing conditions. We report minimal impact of light-at-night on circadian and affective behaviours, as measured by the tail suspension test, the forced swim test, the sucrose preference test and the elevated plus maze. Light-at-night was also not associated with an increase in body weight, but was associated with a decrease in the cell proliferation marker Ki-67 in the dentate gyrus. In summary, we conclude that experimental contextual factors, such as model species or strain, may be considerable importance in the investigation of the impact of light at night on mood-related parameters. |
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Department of Psychology, Maynooth University, National University of Ireland, Maynooth, Ireland. Electronic address: andrew.coogan@mu.ie |
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English |
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0031-9384 |
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PMID:29540316 |
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no |
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GFZ @ kyba @ |
Serial |
1826 |
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Eriksen, A.; Wabakken, P. |
| Title |
Activity patterns at the Arctic Circle: nocturnal eagle owls and interspecific interactions during continuous midsummer daylight |
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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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0908-8857 |
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no |
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GFZ @ kyba @ |
Serial |
1881 |
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