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Author Huang, B.J.; Wu, M.S.; Hsu, P.C.; Chen, J.W.; Chen, K.Y.
Title Development of high-performance solar LED lighting system Type Journal Article
Year 2010 Publication Energy Conversion and Management Abbreviated Journal Energy Conversion and Management
Volume 51 Issue 8 Pages 1669-1675
Keywords (down) Stand-alone solar system; Off-grid solar system; Solar-powered lighting; LED lighting; Solar LED lighting; LED; outdoor lighting
Abstract The present study developed a high-performance charge/discharge controller for stand-alone solar LED lighting system by incorporating an nMPPO system design, a PWM battery charge control, and a PWM battery discharge control to directly drive the LED. The MPPT controller can then be removed from the stand-alone solar system and the charged capacity of the battery increases 9.7%. For LED driven by PWM current directly from battery, a reliability test for the light decay of LED lamps was performed continuously for 13,200 h. It has shown that the light decay of PWM-driven LED is the same as that of constant-current driven LED. The switching energy loss of the MOSFET in the PWM battery discharge control is less than 1%. Three solar-powered LED lighting systems (18 W, 100 W and 150 W LED) were designed and built. The long-term outdoor field test results have shown that the system performance is satisfactory with the control system developed in the present study. The loss of load probability for the 18 W solar LED system is 14.1% in winter and zero in summer. For the 100 W solar LED system, the loss of load probability is 3.6% in spring.
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Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0196-8904 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number IDA @ john @ Serial 330
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Author Yamashita, Y.; Matsushita, Y.; Azuno, T.
Title Catch performance of coastal squid jigging boats using LED panels in combination with metal halide lamps Type Journal Article
Year 2012 Publication Fisheries Research Abbreviated Journal Fisheries Research
Volume 113 Issue 1 Pages 182-189
Keywords (down) Squid jigging; LED; Metal halide lamp; Catch performance; GLM
Abstract Squid attracting light systems consisting of low power light emitting diode panels (LEDs) and conventional metal halide lamps (MHs) were tested to describe the influence of combinations of LEDs and MHs on squid catch. Fishing trials using LEDs (9 kW) and different numbers of MHs were carried out in August and September 2009 targeting two squid species: (1) Japanese common squid Todarodes pacificus in northern waters of the Sea of Japan (off Hokkaido) by 4 coastal squid jigging boats (19 gross tonnage) and (2) swordtip squid Photololigo edulis in western waters (off Iki) by 5 boats of the same class. Catches of both species tended to increase with the number of MHs. Generalized Linear Model analysis revealed that in addition to the number of MHs, the catch amount was influenced by fishing power (ability) of boat and by the monthly variation of squid abundance (only for P. edulis off Iki). The expected catch (number of boxes) was not proportional to the number of MHs. The largest catch was expected for P. edulis off Iki by using LEDs with 24 MHs. The optimal combination of LEDs and MHs for T. pacificus off Hokkaido was less clear because the combination with 36 MHs had the largest positive effect on the catch; this was the maximum number MHs used.
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Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0165-7836 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number IDA @ john @ Serial 105
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Author Mercier, A.; Ycaza, R.; Hamel, J.
Title Long-term study of gamete release in a broadcast-spawning holothurian: predictable lunar and diel periodicities Type Journal Article
Year 2007 Publication Marine Ecology Progress Series Abbreviated Journal Mar. Ecol. Prog. Ser.
Volume 329 Issue Pages 179-189
Keywords (down) Spawning; Periodicity; Lunar cycle; Reproductive synchrony; Holothurians; Echinoderms; Isostichopus fuscus
Abstract Annual and monthly patterns of gamete release by the sea cucumber Isostichopus fuscus on the coast of Ecuador were studied to determine the proximal spawning cue and variations in reproductive output throughout the year. Several hundred newly collected individuals were monitored nearly every month for 4 yr. I. fuscus displayed a lunar spawning periodicity: 0.7 to 34.9% of individuals consistently spawned 1 to 4 d after the new moon. Spawning mostly occurred within one evening; however, some gamete release was often recorded over 2 to 4 consecutive evenings. Individuals maintained in captivity for several months retained their spawning periodicity and timing with the lunar cycle. Conversely, newly caught individuals that were shaded from the moonlight did not spawn, thus demonstrating the apparent lack of endogenous rhythms and prevalence of lunar luminance over other cues (i.e. tidal cycle, fluctuations in barometric pressure). On a spawning night, males typically initiated gamete release around sunset; females spawned just after the peak male broadcast. The percentage of spawning individuals was higher and a greater overlap between male and female peak spawning activity was observed during clear conditions compared with overcast conditions. The gonads of individuals that did not spawn in a given month showed a variety of maturity levels, including post-spawning, growth and mature gametogenic stages. Hence, the individual reproductive cycle is apparently longer than the monthly spawning periodicity observed at the population level, enabling I. fuscus populations to be reproductive year round.
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Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0171-8630 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number IDA @ john @ Serial 104
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Author Entwistle, J.; Slater, D.
Title Making space for 'the social': connecting sociology and professional practices in urban lighting design1 Type Journal Article
Year 2019 Publication The British Journal of Sociology Abbreviated Journal Br J Sociol
Volume in press Issue Pages
Keywords (down) Sociology; Society; Lighting
Abstract Lighting is increasingly recognized as a significant social intervention by both lighting professionals and academic social scientists. However, what counts as 'the social' is diverse and contested, with consequences for what kind of 'social' is performed or invented. Based on a long-term research programme, we argue that collaboration between sociologists and lighting professionals requires negotiating discourses and practices of 'the social'. This paper explores the quality and kinds of spaces made for 'the social' in professional practices and academic collaborations, focusing on two case studies of urban lighting that demonstrate how the space of 'the social' is constrained and impoverished by an institutionalized division between technical and aesthetic lighting. We consider the potential role of sociologists in making more productive spaces for 'the social' in urban design, as part of the central sociological task of 'inventing the social' (Marres, Guggenheim and Wilkie 2018) in the process of studying it.
Address Department of Sociology, London School of Economics
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Publisher Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0007-1315 ISBN Medium
Area Expedition Conference
Notes PMID:30864152 Approved no
Call Number GFZ @ kyba @ Serial 2265
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Author Mitchell, D.; Gallaway, T.
Title Dark sky tourism: economic impacts on the Colorado Plateau Economy, USA Type Journal Article
Year 2019 Publication Tourism Review Abbreviated Journal Tour. Rev.
Volume 74 Issue 4 Pages 930-942
Keywords (down) Society; tourism; Colorado Plateau; United States; astrotourism
Abstract This paper aims to examine the economic impact from dark-sky tourism in national parks in the USA on the Colorado Plateau. The Colorado Plateau is a region encompassing parts of Arizona, Colorado, New Mexico and Utah that is known for its dark, star-filled night skies. Tourists in national parks are increasingly interested in observing this natural recreational amenity – especially considering that it is an ecological amenity that is quickly disappearing from the planet. Using a 10-year forecast of visitors to the national parks and using standard input-output modeling, it is observed that, for the first time anywhere, the value of dark skies to tourism in this area. The authors find that non-local tourists who value dark skies will spend $5.8bn over the next 10 years in the Colorado Plateau. These tourist expenditures will generate $2.4bn in higher wages and create over 10,000 additional jobs each year for the region. Furthermore, as dark skies are even more intense natural amenity in the non-summer months, they have the ability to increase visitor counts to national parks year-round and lead to a more efficient use of local community and tourism-related resources throughout the year.
Address Department of Economics, Missouri State University, Springfield, Missouri, USA;
Corporate Author Thesis
Publisher Emerald Group Place of Publication Editor
Language English Summary Language English Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1660-5373 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number IDA @ john @ Serial 2684
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