Results 11 to 20 of about 3,301,881 (350)

No Time for Time from No-Time

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.
Chua, Eugene Y. S., Callender, Craig
openaire   +3 more sources

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 ...
openaire   +2 more sources

Regulatory T cells confer a circadian signature on inflammatory arthritis

Nature Communications, 2020
Circadian rhythms can alter inflammatory state and activity of inflammatory diseases such as rheumatoid arthritis. Here the authors show that extrinsic signals confer a circadian rhythm to regulatory T cell activity, which in turn drives rhythmic ...
L. E. Hand, K. J. Gray, S. H. Dickson, D. A. Simpkins, D. W. Ray, J. E. Konkel, M. R. Hepworth, J. E. Gibbs   +7 more
doaj   +1 more source

Lunar PNT system concept and simulation results

Open Astronomy, 2022
The revived interest of many countries and the growing number of ongoing and scheduled missions to the Moon increases the significance of supporting navigation system development.
Kaplev Sergey, Titov Maxim, Valentirova Tamara, Mozharov Igor, Bolkunov Alexei, Yaremchuk Valeriy   +5 more
doaj   +1 more source

Continuous-time games of timing [PDF]

Journal of Economic Theory, 2005
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Rida Laraki, Eilon Solan, Nicolas Vieille   +2 more
openaire   +7 more sources

Timing stability of millisecond pulsars and prospects for gravitational-wave detection [PDF]

, 2009
Analysis of high-precision timing observations of an array of approx. 20 millisecond pulsars (a so-called "timing array") may ultimately result in the detection of a stochastic gravitational-wave background.
A. W. Hotan, Backer, Bailes, Bailes, Bell, Bhat, Boyle, Caldwell, Camilo, Cognard, D. J. Champion, D. Yardley, Damour, Edwards, Edwards, Edwards, F. A. Jenet, Foster, Foster, G. B. Hobbs, Grishchuk, Hellings, Hemberger, Hobbs, Hobbs, Hobbs, Hotan, Hotan, Hotan, J. M. Sarkissian, J. P. W. Verbiest, Jacoby, Jacoby, Jaffe, Janssen, Jenet, Jenet, Jin, Johnston, Jonas, Kaspi, Kramer, Lee, Lorimer, Lorimer, Lyne, L��hmer, M. Bailes, Maggiore, Manchester, Matsakis, N. D. R. Bhat, Nan, Nice, Ord, R. N. Manchester, Romani, S. Burke-Spolaor, Sandhu, Sazhin, Segelstein, Sesana, Sesana, Splaver, Standish, Staveley-Smith, Taylor, Toscano, van Straten, van Straten, van Straten, Verbiest, W. A. Coles, W. van Straten, Walker, Wyithe, X. P. You, You   +77 more
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Probabilistic Information Modulates the Timed Response Inhibition Deficit in Aging Mice

Frontiers in Behavioral Neuroscience, 2019
How interval timing is affected by aging constitutes one of the contemporary research questions. There is however a limited number of studies that investigate this research question in animal models of aging.
Ezgi Gür, Ezgi Gür, Yalçın Akın Duyan, Yalçın Akın Duyan, Fuat Balcı, Fuat Balcı   +5 more
doaj   +1 more source

Global timing: a conceptual framework to investigate the neural basis of rhythm perception in humans and non-human species [PDF]

, 2014
Timing cues are an essential feature of music. To understand how the brain gives rise to our experience of music we must appreciate how acoustical temporal patterns are integrated over the range of several seconds in order to extract global timing.
Bendor, D, Geiser, E, Walker, KM
core   +2 more sources

Global Navigation Satellite Systems - Perspectives on Development and Threats to System Operation [PDF]

TransNav, 2016
The rapid development of satellite navigation and timing technologies and the broad availability of user equipment and applications has dramatically changed the world over the last 20 years.
Krzysztof Czaplewski, Dana Goward
doaj   +1 more source

Distinct circadian mechanisms govern cardiac rhythms and susceptibility to arrhythmia

Nature Communications, 2021
Cardiac function fluctuates greatly across the day and night, but this is not simply a consequence of our changing behaviour. The authors highlight the role of the body’s circadian clock in regulating the heart electrical activity, including a time-of ...
Edward A. Hayter, Sophie M. T. Wehrens, Hans P. A. Van Dongen, Alessandra Stangherlin, Shobhan Gaddameedhi, Elena Crooks, Nichola J. Barron, Luigi A. Venetucci, John S. O’ Neill, Timothy M. Brown, Debra J. Skene, Andrew W. Trafford, David A. Bechtold   +12 more
doaj   +1 more source