Results 21 to 30 of about 1,395,528 (162)

Pattern Formation in the Inhomogeneous Cooling State of Granular Fluids [PDF]

, 2003
We present results from comprehensive event-driven (ED) simulations of nonlinear pattern formation in freely-evolving granular gases. In particular, we focus on the the morphologies of density and velocity fields in the inhomogeneous cooling state (ICS).
Behringer R. P., Binder K., Brito R., Kishino T. (ed), Porod G., Rapaport D. C., S Puri, S. K Das   +7 more
core   +2 more sources

The role and implications of mammalian cellular circadian entrainment

FEBS Letters, EarlyView.
At their most fundamental level, mammalian circadian rhythms occur inside every individual cell. To tell the correct time, cells must align (or ‘entrain’) their circadian rhythm to the external environment. In this review, we highlight how cells entrain to the major circadian cues of light, feeding and temperature, and the implications this has for our
Priya Crosby
wiley   +1 more source

Review of The Mind’s I by Douglas Hofstadter and Daniel Dennett (1981) (review revised 2019 [PDF]

, 2019
A mixed bag dominated by H & D's reductionist nonsense. This is a follow-up to Hofstadter´s famous (or infamous as I would now say, considering its unrelenting nonsense) Godel, Escher, Bach (1980).
Starks, Michael
core  

Pseudotensors and quasilocal energy-momentum [PDF]

, 1999
Early energy-momentum investigations for gravitating systems gave reference frame dependent pseudotensors; later the quasilocal idea was developed. Quasilocal energy-momentum can be determined by the Hamiltonian boundary term, which also identifies the ...
A. Papapetrou, A. Trautman, C. M. Chen, C. M. Chen, C. Møller, C. W. Misner, Chia-Chen Chang, Chiang-Mei Chen, D. Bak, D. Christodoulou, G. Bergqvist, J. D. Brown, J. Frauendiener, J. Jezierski, J. Katz, J. Kijowski, J. Kijowski, J. M. Aguirregabiria, J. M. Nester, J. M. Nester, J. N. Goldberg, James M. Nester, L. B. Szabados, L. B. Szabados, L. D. Landau, M. Dubois-Violette, P. G. Bergmann, R. P. Wallner, S. A. Hayward, S. Lau, S. N. Gupta, S. Weinberg, T. Regge   +32 more
core   +2 more sources

Time after time – circadian clocks through the lens of oscillator theory

FEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo, Carolin Ector, Hanspeter Herzel   +2 more
wiley   +1 more source

On the relation between Unruh and Sokolov--Ternov effects

, 2007
We show that the Sokolov--Ternov effect -- the depolarization of particles in storage rings coming from synchrotron radiation due to spin flip transitions -- is physically equivalent to the Unruh effect for circular acceleration if one uses a spin 1/2 ...
Baier V. N., Borisov A., Derbenev Ya. S., DOUGLAS SINGLETON, EMIL T. AKHMEDOV, Frank I. M., Guimaraes A. C. C., Landau L., Landau L., Landau L., Narozhny N. B., Sokolov A. A., Volovik G.   +12 more
core   +1 more source

Unconstrained Hamiltonian formulation of General Relativity with thermo-elastic sources [PDF]

, 1998
A new formulation of the Hamiltonian dynamics of the gravitational field interacting with(non-dissipative) thermo-elastic matter is discussed. It is based on a gauge condition which allows us to encode the six degrees of freedom of the ``gravity + matter'
Anile A M, Arnowitt R, Bressan A, Carter B, Carter B, Cattaneo C, Comer G L, Comer G L, Courant R, De Witt B, Giulio Magli, Glass E N, Haensel P, Hajicek P, Holm D, Iacoviello D, Jerzy Kijowski, Jezierski J, Kijowski J, Kijowski J, Kijowski J, Kijowski J, Kuchar K V, Künzle H P, Maugin G A, Maugin G A, Maugin G A, Maugin G A, Maugin G A, Shapiro S L, Souriau J M, Truesdell C   +31 more
core   +2 more sources

Integration of a skier-specific keypoint detection model in a hybrid 3D motion capture pipeline

Current Issues in Sport Science
Introduction & Purpose Alpine skiing, like many outdoor sports, presents significant challenges for motion capture due to its large capture volumes, high athlete speeds, variable environmental conditions, and occlusions, e.g., due to snow spray. While
Michael Zwölfer, Martin Mössner, Helge Rhodin, Werner Nachbauer, Dieter Heinrich   +4 more
doaj   +1 more source

Sequence determinants of RNA G‐quadruplex unfolding by Arg‐rich regions

FEBS Letters, EarlyView.
We show that Arg‐rich peptides selectively unfold RNA G‐quadruplexes, but not RNA stem‐loops or DNA/RNA duplexes. This length‐dependent activity is inhibited by acidic residues and is conserved among SR and SR‐related proteins (SRSF1, SRSF3, SRSF9, U1‐70K, and U2AF1).
Naiduwadura Ivon Upekala De Silva, Puspa Kunwar, Md Ibnul Rifat Rahman, Joanna Koryo Kwao, Nathan Lehman, Zihan Zhang, Trenton Paul, Claire Cheng, Nicholas Truex, Hui‐Ting Lee, Jun Zhang   +10 more
wiley   +1 more source

Effect of magnetic field on current colection on bare tether in LEO [PDF]

, 2002
An eiectrodynamic Tether is a long thin conductive string deployed from a spacecraft. A part of the ED tether near one end, which is rendered positive by the Electromotive force (EMF)along the tether, collects electrons from the ambient plasma.
Cooke, D.L., Martínez-Sánchez, Manuel, Onishi, Tatsuo, Sanmartín Losada, Juan Ramón   +3 more
core