It is shown that a commutative reduced ring R is a Baer ring if and only if it is a CS-ring; if and only if every dense subset of Spec (R) containing Max (R) is an extremally disconnected space; if and only if every non-zero ideal of R is essential in a principal ideal generated by an idempotent.

Aiming at improving the performance of Organic Rankine Cycle (ORC) system with low-grade steam as heat source, this work studied and optimized main operating parameters ORC system. The effects evaporation temperature, superheat degree, condensation temperature regenerator pinch difference on were obtained. optimization for is based indicators specific net power output, waste pollution, cycle ex...

We present the first experimental demonstration of an asynchronous digital optical regenerator at 42.67 Gbit/s. The system effectively retimes incoming asynchronous data bursts to a local clock without burst mode clock recovery and converts the signal to a desired wavelength and duty cycle. ©2008 Optical Society of America OCIS codes: (060.2330) Fiber optics communications; (060.4510) Optical c...

The paper presents the results of simulation tests hydraulic resistance and temperature distribution prototype Stirling alpha engine supplied with waste heat. following elements were analyzed: heater, regenerator cooler. uses compressed air as a working gas. Analyses carried out for three pressure values and different speeds. work was in order to optimize the configuration due minimization hydr...

ABSTRACT We consider a framework for non-ideal magnetohydrodynamics in general relativity, paying particular attention to the physics involved. The discussion highlights connection between microphysics (associated with given equation of state) and global dynamics (from point view numerical simulations), includes careful consideration assumptions that lead ideal resistive magnetohydrodynamics. p...