Sven Hädel
Charité
6 Papers
Sven Hädel is an academic researcher from Charité. The author has contributed to research in topics: Circadian rhythm & Melatonin. The author has an hindex of 5, co-authored 6 publications. Previous affiliations of Sven Hädel include Humboldt University of Berlin.
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Papers
Blue-Enriched Morning Light as a Countermeasure to Light at the Wrong Time: Effects on Cognition, Sleepiness, Sleep, and Circadian Phase.
Mirjam Münch,Claudia Nowozin,Johannes Regente,Frederik Bes,Jan de Zeeuw,Sven Hädel,Amely Wahnschaffe,Dieter Kunz +7 more
TL;DR: It is indicated that bright blue-enriched morning light stabilizes circadian phase, and it could be an effective counterstrategy for poor lighting during the day and also light exposure at the wrong time, such as in the late evening.
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Degree of pineal calcification (DOC) is associated with polysomnographic sleep measures in primary insomnia patients.
Richard Mahlberg,Thorsten Kienast,Sven Hädel,J. O. Heidenreich,J. O. Heidenreich,Stephan Schmitz,Dieter Kunz +6 more
TL;DR: DOC appears to be a superior indicator of melatonin deficit compared to the absolute amount ofmelatonin in the circulation, and may serve as a marker of CTS instability in patients with primary insomnia.
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Applying Melanopic Lux to Measure Biological Light Effects on Melatonin Suppression and Subjective Sleepiness.
Claudia Nowozin,Amely Wahnschaffe,Andrea Rodenbeck,Jan de Zeeuw,Sven Hädel,Ruslan Kozakov,Heinz Schöpp,Mirjam Münch,Dieter Kunz +8 more
TL;DR: Some new relevance is indicated for the application of melanopic lux as an additional metric to predict non-visual light effects of electrical light sources for nursing homes, work places, and homes.
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Living in Biological Darkness: Objective Sleepiness and the Pupillary Light Responses Are Affected by Different Metameric Lighting Conditions during Daytime.
Jan de Zeeuw,Alexandra Papakonstantinou,Claudia Nowozin,Sophia Stotz,Mandy Zaleska,Sven Hädel,Frederik Bes,Mirjam Münch,Dieter Kunz +8 more
TL;DR: The results suggest the pupillary light response as a noninvasive physiological marker for ambient light exposure effects during daytime, and implies that optimizing the light spectrum could be important to improve daytime alertness.
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Patent
Demonstrator for simulating daylight
Dieter Kunz,Sven Hädel +1 more
- 11 Jul 2016
TL;DR: In this paper, a demonstrator for simulating daylight is described, which is characterized by an illumination device (3) comprising at least a first plurality of lighting elements (3.1; 3.2) which emit light having a second wavelength in a second spectral range, the first wavelength being shorter than the second wavelength.