|   | 
Details
   web
Records
Author Phipps-Nelson, J.; Redman, J.R.; Schlangen, L.J.M.; Rajaratnam, S.M.W.
Title Blue light exposure reduces objective measures of sleepiness during prolonged nighttime performance testing Type Journal Article
Year 2009 Publication Chronobiology International Abbreviated Journal Chronobiol Int
Volume 26 Issue 5 Pages 891-912
Keywords Human Health
Abstract (down) This study examined the effects of nocturnal exposure to dim, narrowband blue light (460 nm, approximately 1 lux, 2 microW/cm2), compared to dim broad spectrum (white) ambient light ( approximately 0.2 lux, 0.5 microW/cm2), on subjective and objective indices of sleepiness during prolonged nighttime performance testing. Participants were also exposed to a red light (640 nm, approximately 1 lux, 0.7 microW/cm2) placebo condition. Outcome measures were driving simulator and psychomotor vigilance task (PVT) performance, subjective sleepiness, salivary melatonin, and electroencephalographic (EEG) activity. The study had a repeated-measures design, with three counterbalanced light conditions and a four-week washout period between each condition. Participants (n = 8) maintained a regular sleep-wake schedule for 14 days prior to the approximately 14 h laboratory study, which consisted of habituation to light conditions followed by neurobehavioral performance testing from 21:00 to 08:30 h under modified constant-routine conditions. A neurobehavioral test battery (2.5 h) was presented four times between 21:00 and 08:30 h, with a 30 min break between each. From 23:30 to 05:30 h, participants were exposed to blue or red light, or remained in ambient conditions. Compared to ambient light exposure, blue light exposure suppressed EEG slow wave delta (1.0-4.5 Hz) and theta (4.5-8 Hz) activity and reduced the incidence of slow eye movements. PVT reaction times were significantly faster in the blue light condition, but driving simulator measures, subjective sleepiness, and salivary melatonin levels were not significantly affected by blue light. Red light exposure, as compared to ambient light exposure, reduced the incidence of slow eye movements. The results demonstrate that low-intensity, blue light exposure can promote alertness, as measured by some of the objective indices used in this study, during prolonged nighttime performance testing. Low intensity, blue light exposure has the potential to be applied to situations where it is desirable to increase alertness but not practical or appropriate to use bright light, such as certain occupational settings.
Address School of Psychology, Psychiatry and Psychological Medicine, Monash University, Clayton, Victoria, Australia
Corporate Author Thesis
Publisher Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0742-0528 ISBN Medium
Area Expedition Conference
Notes PMID:19637049 Approved no
Call Number GFZ @ kyba @ Serial 2202
Permanent link to this record
 

 
Author Shith, S. & Ramli, N. A.
Title Night-time ground-level ozone trends and variability over the urban sites Type Journal Article
Year 2019 Publication Journal of Sustainability Science and Management Abbreviated Journal
Volume 14 Issue 5 Pages 195-201
Keywords Atmospheric chemistry; air pollution
Abstract (down) This study evaluates the variation of night-time ground-level ozone (O3), nitrogen dioxide (NO2 ) and nitric oxide (NO) from year 2015 to 2016. During this period, the recorded maximum night-time ground-level O3 was 55 ppb at Putrajaya (PT), which have more areas with higher brightness level compared to another urban site, Alor Setar (AS) at 21 ppb. Lower NO concentrations restricted the sinking agents, thus, reducing the depletion rates and resulted in O3 to remain in the atmosphere. The contributor toward night-time ground-level O3 concentration in the urban site was not only NO2 concentration, as light pollution might enhance the O3 formations. The photochemistry rate was commonly accounted to be zero due to the absence of photochemical reactions at night. However, the minimum photochemistry rate in both urban was recorded at the ranged from 1.50-2.70 ppb, indicating that O3 was also titrated at night even though the value is not as high as during the day.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number IDA @ intern @ Serial 2734
Permanent link to this record
 

 
Author Campisi, D.; Gitto, S.; Morea, D.
Title Economic feasibility of energy efficiency improvements in street lighting systems in Rome Type Journal Article
Year 2017 Publication International Journal of Energy Economics and Policy Abbreviated Journal
Volume 7 Issue 1 Pages 190-198
Keywords Economics; Energy; Society; LED lighting; LED; real options
Abstract (down) This study evaluates an investment project concerning the redevelopment of the public lighting of the Municipality of Rome. In particular, we consider the replacing of the traditional lamps of the system with LED lamps. We consider the factors that affect this kind of project: the cost of energy, the manteinance cost, the investment cost and the Weighted Average Cost of Capital (WACC). Our results underline the reduction of energy consumption and of the maintenance costs, lower emissions of CO2 into the atmosphere, the reduction of light pollution, the positive effects on road safety and the indipendence by incentives.
Address Department of Industrial Engineering, University of Rome Tor Vergata, Italy
Corporate Author Thesis
Publisher Elsevier Place of Publication Editor
Language English Summary Language English Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number IDA @ intern @ Serial 2629
Permanent link to this record
 

 
Author Keola, S.; Andersson, M.; Hall, O.
Title Monitoring Economic Development from Space: Using Nighttime Light and Land Cover Data to Measure Economic Growth Type Journal Article
Year 2015 Publication World Development Abbreviated Journal World Development
Volume 66 Issue Pages 322-334
Keywords Remote Sensing
Abstract (down) This study demonstrates estimations of economic activities on global, national, and subnational levels using remote sensing data, with a focus on developing economies. It extends a recent statistical framework which uses nighttime lights to estimate official income growth by accounting for agriculture and forestry which emit less or no additional observable nighttime light. The study argues that nighttime lights alone may not explain value-added by agriculture and forestry. By adding land cover data, our framework can be used to estimate economic growth in administrative areas of virtually any size.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0305750X ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number GFZ @ kyba @ Serial 2476
Permanent link to this record
 

 
Author Bergs, R.; Issa, M.
Title What do night satellite images and small-scale grid data tell us about functional changes in the rural-urban environment and the economy? Case studies Frankfurt-Rhein/Main and Ljubljana Urban Region Type Journal Article
Year 2018 Publication Abbreviated Journal
Volume Issue Pages
Keywords Remote Sensing
Abstract (down) This study addresses how nocturnal satellite imagery can be used in spatial analysis of rural-urban relations. It shows how a novel approach can be used to complement the prevalent traditional survey methods below the data resolution level of official regional statistics. The overarching aim is to contribute with a novel database and different empirical tools to broaden spatial information for decision-making in policy and planning at small spatial scale amongst municipalities. The accuracy of spatial information is expected to be substantially enhanced, paving ways for better rural-urban planning coordination and synergies.
Address
Corporate Author PRAC - Bergs & Issa Partnership Co. , Im Hopfengarten 19b, D - 65812 Bad Soden, Germany Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number GFZ @ kyba @ Serial 2047
Permanent link to this record