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Author Mulvin, D. url  doi
openurl 
  Title Media Prophylaxis: Night Modes and the Politics of Preventing Harm Type Journal Article
  Year 2018 Publication Information & Culture Abbreviated Journal Information & Culture  
  Volume (down) 53 Issue 2 Pages 175-202  
  Keywords History; Lighting; Society  
  Abstract This article develops the term “media prophylaxis” to analyze the ways technologies are applied to challenges of calibrating one’s body with its environment and as defenses against endemic, human-made harms. In recent years, self-illuminated screens (like those of computers, phones, and tablets) have been identified by scientists, journalists, and concerned individuals as particularly pernicious sources of sleep-disrupting light. By tracing the history of circadian research, the effects of light on sleep patterns, and the recent appearance of software like “f.lux,” Apple’s “Night Shift,” and “Twilight,” this article shows how media-prophylactic technologies can individualize responsibility for preventing harm while simultaneously surfacing otherwise ignored forms of chronic suffering.  
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  Series Volume Series Issue Edition  
  ISSN 2164-8034 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number GFZ @ kyba @ Serial 1917  
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Author Point, S. doi  openurl
  Title Blue Light Hazard: are exposure limit values protective enough for newborn infants? Type Journal Article
  Year 2018 Publication Radioprotection Abbreviated Journal  
  Volume (down) 53 Issue 3 Pages 219-224  
  Keywords Human Health  
  Abstract Blue Light Hazard is an emerging concern for health of population. Nevertheless, acute exposure to blue rays from artificial light is well taken into account by normative requirements applicable to lamps engineering and risk for general population is low. There is also no evidence for a chronic effect of artificial lighting on retina for general population at radiance below exposure limit values. That said, children in the very first years of life constitute a specific population to consider. On one side, eye anatomy of very young infants is different from elder young people or adults. On the other side, infants can be in close contact with some luminous toys or night lights. This paper presents a first approach for taking into account the specific anatomy of newborn infants’ eyes in blue light hazard evaluation. Results show that differences of crystalline lens transparency, focal length and pupil diameter could induce a significantly higher retinal exposure than for adult.  
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  Area Expedition Conference  
  Notes Approved no  
  Call Number GFZ @ kyba @ Serial 1982  
Permanent link to this record
 

 
Author Nagare, R.; Plitnick, B.; Figueiro, M. url  doi
openurl 
  Title Does the iPad Night Shift mode reduce melatonin suppression? Type Journal Article
  Year 2018 Publication Lighting Research & Technology Abbreviated Journal Lighting Research & Technology  
  Volume (down) 51 Issue 3 Pages 373-383  
  Keywords Human Health  
  Abstract The increased use of self-luminous displays, especially in the evening prior to bedtime, has been associated with melatonin suppression, delayed sleep and sleep curtailment. The present study set out to investigate whether the Night Shift application provided by Apple Inc. for use on its portable electronic devices is effective for reducing acute melatonin suppression, a well-established marker of circadian phase. Participants experienced four experimental conditions: a dim light control, a high circadian stimulus true positive intervention and two Night Shift interventions delivering low and high correlated colour temperature light from the devices. Melatonin suppression did not significantly differ between the two Night Shift interventions, which indicates that changing the spectral composition of self-luminous displays without changing their brightness settings may be insufficient for preventing impacts on melatonin suppression.  
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  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 1477-1535 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number LoNNe @ kyba @; GFZ @ kyba @ Serial 1798  
Permanent link to this record
 

 
Author Nagare, R.; Plitnick, B.; Figueiro, M. url  doi
openurl 
  Title Effect of exposure duration and light spectra on nighttime melatonin suppression in adolescents and adults Type Journal Article
  Year 2018 Publication Lighting Research & Technology Abbreviated Journal Lighting Research & Technology  
  Volume (down) 51 Issue 4 Pages 530-543  
  Keywords Human Health  
  Abstract This study investigated how light exposure duration affects melatonin suppression, a well-established marker of circadian phase, and whether adolescents (13–18 years) are more sensitive to short-wavelength (blue) light than adults (32–51 years). Twenty-four participants (12 adolescents, 12 adults) were exposed to three lighting conditions during successive 4-h study nights that were separated by at least one week. In addition to a dim light (<5 lux) control, participants were exposed to two light spectra (warm (2700 K) and cool (5600 K)) delivering a circadian stimulus of 0.25 at eye level. Repeated measures analysis of variance revealed a significant main effect of exposure duration, indicating that a longer duration exposure suppressed melatonin to a greater degree. The analysis further revealed a significant main effect of spectrum and a significant interaction between spectrum and participant age. For the adolescents, but not the adults, melatonin suppression was significantly greater after exposure to the 5600 K intervention (43%) compared to the 2700 K intervention (29%), suggesting an increased sensitivity to short-wavelength radiation. These results will be used to extend the model of human circadian phototransduction to incorporate factors such as exposure duration and participant age to better predict effective circadian stimulus.  
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  Corporate Author Thesis  
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  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1477-1535 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number GFZ @ kyba @ Serial 1821  
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Author S Fotios, J Uttley url  doi
openurl 
  Title Illuminance required to detect a pavement obstacle of critical size Type Journal Article
  Year 2018 Publication Lighting Research & Technology Abbreviated Journal  
  Volume (down) 50 Issue Pages 390-404  
  Keywords Vision; Lighting  
  Abstract This paper investigates the illuminance needed to detect trip hazards for pedestrians walking after dark. In previous work, it was assumed that the critical obstacle height is 25&#8201;mm: further review of accident data and foot clearance data suggests instead that 10&#8201;mm is the critical height. Eye tracking records suggest a tendency for obstacles to be detected approximately 3.4&#8201;m ahead. Interpretation of obstacle detection data suggests horizontal photopic illuminances of up to 0.9&#8201;lux are required for peripheral detection of a 10&#8201;mm obstacle 3.4&#8201;m ahead, according to the scotopic/photopic ratio of the lighting and the age of the observer.  
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  Corporate Author Thesis  
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  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 LoNNe @ kyba @ Serial 1765  
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