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Author Mammola, S.; Isaia, M.; Demonte, D.; Triolo, P.; Nervo, M.
Title Artificial lighting triggers the presence of urban spiders and their webs on historical buildings Type Journal Article
Year 2018 Publication Landscape and Urban Planning Abbreviated Journal Landscape and Urban Planning
Volume 180 Issue Pages 187-194
Keywords Animals; Lighting
Abstract Different spider species living in the urban environment spin their webs on building facades. Due to air pollution, web aggregations entrap dirt particles over time, assuming a brownish-greyish colouration and thus determining an aesthetic impact on buildings and street furniture. In Europe, the most common species causing such an aesthetic nuisance is Brigittea civica (Lucas) (Dictynidae). In spite of the socio-economical relevance of the problem, the ecological factors driving the proliferation of this species in the urban environment are poorly described and the effectiveness of potential cleaning activities has never been discussed in scientific literature. Over one year, we studied the environmental drivers of B. civica webs in the arcades of the historical down-town district of Turin (NW-Italy). We selected a number of sampling plots on arcade ceilings and we estimated the density of B. civica webs by means of digital image analysis. In parallel, we collected information on a number of potential explanatory variables driving the arcade colonization, namely artificial lighting at night, substrate temperature, distance from the main artificial light sources and distance from the river. Regression analysis showed that the coverage of spider webs increased significantly at plots with higher light intensity, with a major effect related to the presence of historical lampposts with incandescent lamps rather than halogen lamps. We also detected a seasonal variation in the web coverage, with significant higher values in summer. Stemming from our results, we are able to suggest good practices for the containment of this phenomenon.
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Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0169-2046 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number GFZ @ kyba @ Serial 2002
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Author Bullough, J.D.; Skinner, N.P.
Title Real-World Demonstrations of Novel Pedestrian Crosswalk Lighting Type Journal Article
Year 2017 Publication Transportation Research Record: Journal of the Transportation Research Board Abbreviated Journal Transportation Research Record: Journal of the Transportation Research Board
Volume 2661 Issue Pages 62-68
Keywords Lighting; Public Safety; Planning
Abstract Outdoor urban pedestrian lighting serves multiple purposes and should do so in the most efficient and economic manner. An important purpose of outdoor urban pedestrian lighting is to support the safety of pedestrians, particularly those who interact with adjacent vehicle traffic, while enhancing pedestrians’ perceptions of personal safety and security. A review of published literature, as well as the demonstration activities summarized, indicates the potential for bollard-level crosswalk lighting to enhance pedestrian visibility and to improve safety at crosswalks, particularly at locations where the presence of a crosswalk might not be expected by approaching drivers. Such locations include midblock crossings, roundabouts, and locations near schools and other public venues that might experience high levels of pedestrian traffic at sporadic or unexpected times.
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Publisher Place of Publication Editor
Language (up) Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0361-1981 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number LoNNe @ kyba @ Serial 1723
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Author Tähkämö, L.; Räsänen, R.-S.; Halonen, L.
Title Life cycle cost comparison of high-pressure sodium and light-emitting diode luminaires in street lighting Type Journal Article
Year 2016 Publication The International Journal of Life Cycle Assessment Abbreviated Journal Int J Life Cycle Assess
Volume 21 Issue 2 Pages 137-145
Keywords Economics; Lighting
Abstract Purpose

Cities and municipalities are facing a great challenge in 2015 when the widely used high-pressure mercury lamps are banned from the European Union market. This results to approximately 18 million lamps to be changed to other light source technologies suitable for outdoor lighting. The most probable replacement technologies are high-pressure sodium and light-emitting diode luminaires. The article provides economic information for the cities and municipalities to use when making the decision on the choice of technology.

Methods

A life cycle cost analysis was conducted for the high-pressure sodium and light-emitting diode luminaires including the investment costs, operating costs and residual value over 30-year time frame. The investment costs included the purchase prices of all parts, freight and installation costs. The operating costs accounted for the energy and maintenance costs, and the residual value was calculated using the 25 % estimate of the initial purchase price. The approach of the calculation considered only the luminaires to be installed; the scope of the study excluded the previous installations, which may contain any light source technology or be inexistent. The analysis excluded the poles, wiring and other infrastructure. A sensitivity analysis additionally studied six scenarios, in which relevant calculation parameters were changed.

Results and discussion

The life cycle cost analysis of the two road lighting luminaire technologies showed that the HPS luminaire was normally a more economical solution compared to the light-emitting diode (LED) luminaire. The total life cycle costs of the HPS luminaire were 45 % lower than those of the LED luminaire per kilometre. However, the scenarios in the sensitivity analysis indicated that there were circumstances where the cost-efficiency of the LED luminaire was particularly improved. In order for the LED technology to become fully competitive against the HPS technology, several scenarios have to take place simultaneously. The life cycle costs of the LED luminaire were reduced compared to the HPS luminaire by increased electricity price, exclusion of spot replacements, reduced purchase price and modularity of the LED luminaire.

Conclusions

Despite the greater luminous efficacy, the LED luminaire was found to have greater life cycle costs compared to the HPS luminaire. However, the LED technology is expected to become more economical in the future due to the development in luminous efficacy, improved product quality, reduction in the purchase price and the enhanced competition in the LED segment. Despite the unfavourable cost structure, the LED technology offers other benefits, such as lighting controls and colour characteristics.
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Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0948-3349 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number LoNNe @ kyba @ Serial 1725
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Author Schreuder, D.A.
Title Pollution-Free Road Lighting Type Journal Article
Year 2001 Publication Transactions of the International Astronomical Union Abbreviated Journal Trans. Int. Astron. Union
Volume 24 Issue 03 Pages 364
Keywords Lighting; Skyglow
Abstract The beneficial effects of road lighting are often seen as very important. They relate to reducing road accidents and some forms of crime but also enhance the social safety of residents and pedestrians and the amenity for residents. Road traffic in developing countries is much more hazardous than in industrialized countries. Accident rates in ‘low’ income countries may be as much as 35 times higher than in ‘high’ income countries. Thus, it might be much more cost-effective to light roads in the developing world than in the industrialized world. Fighting light pollution is more pressing in developing countries as most of the major high-class astronomical observatories are there. Astronomical observations are disturbed by light from outdoor lighting installations, part of which is scattered in the atmosphere to form ‘sky glow’. The International Lighting Commission CIE has published a Technical Report giving general guidance for lighting designers and policy makers on the reduction of the sky glow.
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Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0251-107X ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number LoNNe @ kyba @ Serial 1726
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Author Herie Park, Hyensou Pak, Chan-Su Lee
Title Prospect of Automotive Lighting Systems of Self-Driving Vehicles Type Journal Article
Year 2017 Publication Journal of the Korean Institute of Illuminating and Electrical Installation Engineers Abbreviated Journal
Volume 31 Issue 8 Pages 1-8
Keywords Lighting
Abstract Light sources and lighting technology adapted to vehicles have been developed to assist drivers’ safety and to perceive other vehicles and pedestrians during the nighttime. As autonomous vehicles driven by data obtained from sensors are shown up, the role of the automotive lighting system should be reconsidered for the future traffic environment. This paper presents the future prospects of automotive lighting systems adapted to self-driving vehicles. It describes a current state of automotive lighting systems, and roles of the lighting systems suitable for self-driving vehicles. It also deals with the related topics of automotive lightings such as energy management, light pollution, security, and hybrid lighting systems for the road that combine with computer-and human-drivers during a transition period.
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Language (up) Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
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ISSN ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number LoNNe @ kyba @ Serial 1742
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