By rectangle packing we mean putting a set of rectangles into an enclosing rectangle, without any overlapping. We begin with perfect rectangle packing problems, then prove two continuity properties for parallel rectangle packing problems, and discuss how they might be used to obtain negative results for perfect rectangle packing problems.

The period operation of power electronic acts as switching element, where the dissipated consists pulses at certain duty cycle, semiconductor temperature oscillates and varies a waveform. In present study, an experimental investigation was carried out for loop thermosyphon order to evaluate effect pulsate surface heat flux on single-phase buoyancy driven convection ethylene glycol flow through ...