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Author Nguyen, K.Q.; Tran, P.D.; Nguyen, L.T.; To, P.V.; Morris, C.J.
Title Use of light-emitting diode (LED) lamps in combination with metal halide (MH) lamps reduce fuel consumption in the Vietnamese purse seine fishery Type Journal Article
Year 2020 Publication Aquaculture and Fisheries Abbreviated Journal Aquaculture and Fisheries
Volume in press Issue Pages in press
Keywords Economics; Animals; Lighting
Abstract The use of high-power lights during night-time purse seining is common in Vietnam. Typically, metal halide (MH) lamps are used in the commercial fishery to attract fish, however these lights require more energy, have a shorter lifespan, and lower chromatic performance than light emitting diode (LED) lamps. This study examined catch efficiency and fuel consumption when using LED lamps in combination with reduced numbers of MH lamps (10.24 kW), compared to conventional lighting (28.6 kW), used during purse seining off the coast of Ninh Thuan province, Vietnam. The economic performance associated with using LED lamps in this fishery was also assessed. We found no significant differences in catch rates between the different light treatments, however fuel consumption was significantly reduced. Fuel consumption per nightly trip using LED with MH lamps was 70.8 l (11.1 l/h) compared to114 l (17.45 l/hr) using MH lamps alone, an estimated 37.9% reduction in fuel consumption. An investment in LED lamps by a fishing enterprise will require additional initial costs, however our analysis revealed the financial break-event point can be reached after approximately 101 nightly trips when the fuel price is at the 2015 level of USD $0.74 per l. Fishing enterprises can increase their profitability, and reduce CO2 emissions, by using LED lamps in the Vietnamese purse seine fishery.
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ISSN (down) 2468550X ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number GFZ @ kyba @ Serial 3102
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Author Torres-Farfan, C.; Mendez, N.; Ehrefeld, P.; Seron-Ferre, M.
Title In utero circadian changes; facing light pollution Type Journal Article
Year 2019 Publication Current Opinion in Physiology Abbreviated Journal Current Opinion in Physiology
Volume 13 Issue Pages 128-134
Keywords Human Health; Review; In Utero; Pregnancy; Circadian Rhythm
Abstract Regardless of the molecular and physiological mechanisms involved, maternal fetal circadian systems interactions are recognized as crucial crosstalk for fetal development, and in turn, it may be a key factor determining fitting health in adulthood. However, in the last 100 years, life on the planet has altered the natural light-dark cycle by increasing light at night inducing disorganization of the circadian system, i.e. chronodisruption, including perturbation of the melatonin circadian rhythm by decreasing its nocturnal peak. The reduction in melatonin is associated with gradual losses in antioxidant protection, immunological and anti-inflammatory effects and as stated by WHO, the lack of nocturnal peak of melatonin is a deleterious signal that may induce chronic disease and cancer. Collectively the current review provides evidence about the role played by maternal circadian rhythms in fetal development and the impact of fetal-maternal desynchronization in the health and diseases of the offspring.
Address Laboratory of Developmental Chronobiology, Faculty of Medicine, Universidad Austral de Chile, Valdivia, Chile; claudia.torres(at)uach.cl
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Publisher Elsever Place of Publication Editor
Language English Summary Language English Original Title
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ISSN (down) 2468-8673 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number GFZ @ kyba @ Serial 2761
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Author Wang, H.-B.; Whittaker, D.S.; Truong, D.; Mulji, A.K.; Ghiani, C.A.; Loh, D.H.; Colwell, C.S.
Title Blue light therapy improves circadian dysfunction as well as motor symptoms in two mouse models of Huntington's disease Type Journal Article
Year 2017 Publication Neurobiology of Sleep and Circadian Rhythms Abbreviated Journal Neurobiology of Sleep and Circadian Rhythms
Volume 2 Issue Pages 39-52
Keywords animals; Human Health
Abstract Patients with Huntington's disease (HD) exhibit movement disorders, psychiatric disturbance and cognitive impairments as the disease progresses. Abnormal sleep/wake cycles are common among HD patients with reports of delayed sleep onset, fatigue during the day, and a delayed pattern of melatonin secretion all of which suggest circadian dysfunction. Mouse models of HD confirm disrupted circadian rhythms with pathophysiology found in the central circadian clock (suprachiasmatic nucleus). Importantly, circadian dysfunction manifests early in disease, even before the classic motor symptoms, in both patients and mouse models. Therefore, we hypothesize that the circadian dysfunction may interact with the disease pathology and exacerbate the HD symptoms. If correct, early intervention may benefit patients and delay disease progression. One test of this hypothesis is to determine whether light therapy designed to strengthen this intrinsic timing system can delay the disease progression in mouse models. Therefore, we determined the impact of blue wavelength-enriched light on two HD models: the BACHD and Q175 mice. Both models received 6 hours of blue-light at the beginning of their daily light cycle for 3 months. After treatment, both genotypes showed improvements in their locomotor activity rhythm without significant change to their sleep behavior. Critically, treated mice of both lines exhibited improved motor performance compared to untreated controls. Focusing on the Q175 genotype, we sought to determine whether the treatment altered signaling pathways in brain regions known to be impacted by HD using NanoString gene expression assays. We found that the expression of several HD relevant markers was altered in the striatum and cortex of the treated mice. Our study demonstrates that strengthening the circadian system can delay the progression of HD in pre-clinical models. This work suggests that lighting conditions should be considered when managing treatment of HD and other neurodegenerative disorders.
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ISSN (down) 2451-9944 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number LoNNe @ kyba @ Serial 1626
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Author Checa, J.; Nel·lo, O.
Title Urban Intensities. The Urbanization of the Iberian Mediterranean Coast in the Light of Nighttime Satellite Images of the Earth Type Journal Article
Year 2018 Publication Urban Science Abbreviated Journal Urban Science
Volume 2 Issue 4 Pages 115
Keywords Remote Sensing; Tourism
Abstract The contribution shares the approach of critical urban studies that have conceptualized urbanization more as a process than as a sum of spatial forms. Thus, the contribution studies the urbanization process not only from the point of view of the physical occupation of land but also considers changes in the intensity of the uses of space. To fulfill this aim, the new sources of nocturnal satellite images are particularly useful. These allow us to observe the intensity of urban uses both in terms of their distribution over space and their recurrence over time. The research focuses on the Iberian Mediterranean coast and permits the verification of the intensity of the urban uses of the space for the whole of this area and their seasonal variations throughout the year. The source of the study are the nighttime satellite images of the Earth for the 2012–2017 period from the NASA SNPP satellite equipped with the VIIRS-DNB instrument. By establishing a threshold of urban light the research shows that those districts with the greatest extensions of urban light do not necessarily correspond with the most densely populated areas. Similarly the absence of urban light does not necessarily indicate the absence of urban uses. Finally, the variations of intensity of light prove to be a good indicator of seasonal variations of activity in tourist areas.
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ISSN (down) 2413-8851 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number GFZ @ kyba @ Serial 2120
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Author Ogando-Martínez, A.; Troncoso-Pastoriza, F.; Eguía-Oller, P.; Granada-Álvarez, E.; Erkoreka, A.
Title Model Calibration Methodology to Assess the Actual Lighting Conditions of a Road Infrastructure Type Journal Article
Year 2020 Publication Infrastructures Abbreviated Journal Infrastructures
Volume 5 Issue 1 Pages 2
Keywords Lighting
Abstract Street lighting plays an important role in the comfort and safety of drivers and pedestrians, so the control and management of the lighting systems operation and consumption is an essential service for a city. In this document, a methodology is presented to calibrate lighting models in order to assess the lighting performance through simulation techniques. The objective of this calibration is to identify the maintenance factor of the street lamps, determine the real average luminance coefficient of the road pavement and adapt the reflection properties of the road material. The method is applied in three stages and is based on the use of Radiance and GenOpt software suits for the modeling, simulation, and calibration of lighting scenes. The proposed methodology achieves errors as low as 13% for the calculation of illuminance and luminance, evincing its potential to assess the actual lighting conditions of a road.
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Series Volume Series Issue Edition
ISSN (down) 2412-3811 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number GFZ @ kyba @ Serial 2802
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