Results 41 to 50 of about 817,899 (281)

Entropy of gravitating systems: scaling laws versus radial profiles [PDF]

, 2006
Through the consideration of spherically symmetric gravitating systems consisting of perfect fluids with linear equation of state constrained to be in a finite volume, an account is given of the properties of entropy at conditions in which it is no ...
't Hooft G, Alessandro Pesci, Banks T, Banks T Fischler W, Banks T Fischler W, Bekenstein J, Birkhoff G D, Chandrasekhar S, Katz J, Misner C W, Renyi A, Zel'dovich Ya B, Zel'dovich Ya B   +12 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

Structural biology of ferritin nanocages

FEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

Assessment of non-sinusoidal reactive power of shunt capacitors in the presence of distorted substation voltage in radial distribution systems

Ain Shams Engineering Journal, 2018
In this paper, an analytical assessment of non-sinusoidal reactive power of shunt capacitors in the presence of substation voltage harmonics in radial distribution systems has been attempted.
Narinder Kumar, Ashwani Kumar
doaj   +1 more source

Topologically protected states in a spider web lattice

Physical Review Research, 2020
Topological phases and edge-state topological protection are explicitly related by the bulk-edge correspondence which assumes the existence a real space boundary in one-dimensional (1D), 2D, or 3D systems.
J. P. Pino, P. Alves, J. D. Gouveia, A. M. Marques, R. G. Dias   +4 more
doaj   +1 more source

Radial orbit instability: review and perspectives

, 2010
This paper presents elements about the radial orbit instability, which occurs in spherical self-gravitating systems with a strong anisotropy in the radial velocity direction. It contains an overview on the history of radial orbit instability.
Antonov V. A., Bartholomew P., Bloch A. M., de Zeeuw P. T., Gillon D., Hénon M., J. Perez, L. Maréchal, Lynden-Bell D., May A., Merritt D., Morrison P.J., Palmer P. L., Perez J., Perez J., Polyachenko V.L., Saha P., Theis C., van Albada T. S.   +18 more
core   +1 more source

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

FEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source

A New Fast Decoupled-Like Algorithm for Radial Distribution Power Flow Problem by Using Rectangular Coordinates

IEEE Access
The classical fast decoupled power flow method is an efficient, important, and commonly used method for solving load flow problems in power systems. Unfortunately, this method encounters convergence problems when used to obtain power flow solutions in ...
Kassim A. Al-Anbarri
doaj   +1 more source

Radial Coulomb and Oscillator Systems in Arbitrary Dimensions

, 1996
A mapping is obtained relating analytical radial Coulomb systems in any dimension greater than one to analytical radial oscillators in any dimension.
Kustaanheimo P., Neil Russell, Schrödinger E., V. Alan Kostelecký   +3 more
core   +2 more sources

The role of stellar radial motions in shaping galaxy surface brightness profiles [PDF]

, 2017
Aims. The physics driving features such as breaks observed in galaxy surface brightness (SB) profiles remains contentious. Here, we assess the importance of stellar radial motions in shaping their characteristics. Methods.
Few, C. G., Florido, E., Gibson, B. K., Pérez, I., Ruiz-Lara, T., Sánchez-Blázquez, P.   +5 more
core   +2 more sources