نتایج جستجو برای: mechanical
تعداد نتایج: 236403 فیلتر نتایج به سال:
First a general definition of reversibility is given which is in accordance with the mechanical concept of reversibility. This definition is applied to thermostatics. It is shown that the smooth curves in the space of equilibrium parameters can be approximated arbitrarily by irreversible or by almost reversible real processes. The work done during an almost reversible process is given by a Pfaf...
Models that invoke nonlinear wavefront propagation in a chemically excitable medium are rife in the biological literature. Indeed, the idea that wavefront propagation can serve as a signaling mechanism has often been invoked to explain synchronization of developmental processes. In this paper we suggest a kind of signaling based not on diffusion of a chemical species but on the propagation of m...
Salt crystallization is one of the most powerful weathering agents that may cause a rapid change in the mechanical properties of stones, and thus limit their durability. Consequently, determining the mechanical properties of stones due to salt crystallization is important for natural building stones used in marine environmental and mild climatic conditions, which expose excessive salt crys...
Background & Aim: Although mechanical ventilation is a life-saving intervention for many infants with respiratory distress syndrome, it carries potential complications. One of these complications is prolonged duration of mechanical ventilation. More than 15 days of mechanical ventilation is associated with increased risk of cerebral palsy and attention deficit hyperactivity disorder among extre...
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