Results 1 to 10 of about 169,703 (149)
Philosophy of Science, 2021 Programs in quantum gravity often claim that time emerges from fundamentally timeless physics. In the semiclassical time program, time arises only after approximations are taken. Here we ask what justifies taking these approximations and show that time seems to sneak in when answering this question.
Craig Callender, Eugene Yew Siang Chua
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The New Ephemeris and Light Curve Analysis of V870 Ara by the Ground-Based and TESS Data
Open Astronomy, 2021 New CCD photometric observations and their investigation of the W UMa-type binary, V870 Ara, are presented. Light curves of the system were taken through BVIfilters from the Congarinni Observatory in Australia.
Poro Atila +6 more
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Letters in Mathematical Physics, 2016 36 pages. Improved exposition. To appear in Lett.
Cattaneo A. S., Schiavina M.
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Scientific Reports, 2023 Colour vision plays many important roles in animal behaviour but the brain pathways processing colour remain surprisingly poorly understood, including in the most commonly used laboratory mammal, mice.
R. C. Feord +4 more
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Regulation of mouse exploratory behaviour by irradiance and cone-opponent signals
BMC Biology, 2023 Background Animal survival depends on the ability to adjust behaviour according to environmental conditions. The circadian system plays a key role in this capability, with diel changes in the quantity (irradiance) and spectral content (‘colour’) of ...
E. Tamayo +3 more
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Adipocyte NR1D1 dictates adipose tissue expansion during obesity
eLife, 2021 The circadian clock component NR1D1 (REVERBα) is considered a dominant regulator of lipid metabolism, with global Nr1d1 deletion driving dysregulation of white adipose tissue (WAT) lipogenesis and obesity.
Ann Louise Hunter +15 more
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BMC Biology, 2020 Background Daily variations in mammalian physiology are under control of a central clock in the suprachiasmatic nucleus (SCN). SCN timing signals are essential for coordinating cellular clocks and associated circadian variations in cell and tissue ...
Court Harding +2 more
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Output from VIP cells of the mammalian central clock regulates daily physiological rhythms
Nature Communications, 2020 VIP-expressing neurons play a central role in circadian timekeeping within the mammalian central clock. Here the authors use opto- and chemogenetic approaches to show that VIP neuronal activity regulates rhythmic activity in downstream hypothalamic ...
Sarika Paul +6 more
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One Time, Two Times, or No Time? [PDF]
, 2021 Contemporary research programs in fundamental physics appear to suggest that there could be two (physical) times---or none at all. This essay articulates these possibilities in the context of quantum gravity, and in particular of cosmological models developed in an approach called `loop quantum gravity', and explains how they could nevertheless ...
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Open Astronomy, 2020 Among different models for determining the habitable zone (HZ) around a star, a Latitudinal Energy Balance Model (LEBM) is very beneficial due to its parametricity which keeps a good balance between complexity and simulation time.
Bahraminasr Majid +4 more
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