We introduce a simple one-dimensional sandpile model that undergoes relaxation oscillations. A single model can account for self-organized critical behavior and relaxation oscillations, depending on the manner in which it is driven, mirroring the experimental situation for real sandpiles. The relaxation oscillations are robust with respect to minor modifications of the avalanche rules, includin...

BACKGROUND It has been shown that the contractile state of airway smooth muscle cells (SMCs) in response to agonists is determined by the frequency of Ca2+ oscillations occurring within the SMCs. Therefore, we hypothesized that the relaxation of airway SMCs induced by agents that increase cAMP results from the down-regulation or slowing of the frequency of the Ca2+ oscillations. METHODS The e...

Summary Single-molecule magnets (SMMs) exhibit magnetization blocking in the presence of strong magnetic anisotropy. By employing molecular engineering, barrier can be significantly modified, remaining independent from other external factors, such as field. Taking advantage hyperfine coupling electronic and nuclear spins further highlights their unique functionality. However, a poor un...

The influence of solute-solvent interactions on the vibrational energy relaxation dynamics of perylene and substituted perylenes in the first singlet excited-state upon excitation with moderate (<0.4 eV) excess energy has been investigated by monitoring the early narrowing of their fluorescence spectrum. This narrowing was found to occur on timescales ranging from a few hundreds of femtoseconds...

introduction long-term annual extreme climate events, especially temperature and precipitation, have generally been used as indicators for the assessment of climate change. one of the most changeable climatic variables in time and space is precipitation. there are great number of research papers focusing on extreme precipitation on global, regional and national scales have been written. the res...

A dead zone in the interaction between two dynamical systems is a region of their joint phase space where one system insensitive to changes other. These can arise number contexts, and presence functions has interesting consequences for emergent dynamics. In this paper, we consider zones general coupled systems. For weakly limit cycle oscillators, investigate criteria that give rise functions. W...

A new mechanism for pressure profile relaxations in an edge tokamak plasma is derived from simulations within the two-fluid three-dimensional turbulence code EMEDGE3D. The relaxation due to diamagnetic coupling resistive ballooning/drift wave dynamics: unstable modes experience explosive growth at high gradients after a phase which they are stabilized by leading onset of transport barrier. shea...