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Harvard business review (Impact Factor: 1.27). 10/2012; 90(10):111-4, 130. DOI: 10.1038/35051668
Source: PubMed


Compromise is a major unifying thread in the fabric of contemporary

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    ABSTRACT: We analyze work and efficiency for an adiabatic rocking ratchet working under three operating regimes: maximum efficiency, maximum work, and a third one which represents a compromise between them. For all of these regimes the application of very concrete loads and external amplitudes is found necessary in order to obtain the maximum possible values of both efficiency and work. The reported results could be valuable to design efficient Brownian motors and compare their operation under different working regimes.
    Physical Review E 11/2003; 68(4):046125. DOI:10.1103/PhysRevE.68.046125 · 2.29 Impact Factor
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    ABSTRACT: The finite-time performance of a quantum-mechanical heat engine (or refrigerator) with a working fluid consisting of many noninteracting harmonic oscillators is considered in order to analyze three optimum operating regimes: maximum efficiency (maximum coefficient of performance), maximum work output (maximum cooling load) and a third one, Omega criterion, which represents a compromise between them. The reported results extend previous findings for macroscopic and mesoscopic energy converters to quantum heat devices and also endorse the Omega criterion as a unified, optimum working regime for energy converters, independent of their size and nature.
    Physical Review E 11/2004; 70(4):046134. DOI:10.1103/PhysRevE.70.046134 · 2.29 Impact Factor
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    ABSTRACT: Arrays of coupled heat engines are proposed as a paradigmatic model to study the trade-off between individual and collective behavior in linear irreversible thermodynamics. The analysis reveals the existence of a control parameter which selects different operation regimes of the whole array. In particular, the regimes of maximum efficiency and maximum power are considered, giving for the latter a general derivation of the Curzon-Ahlborn efficiency which surprisingly does not depend on whether or not the individual engines in the array work at maximum power.
    Physical Review Letters 04/2007; 98(13):130602. DOI:10.1103/PhysRevLett.98.130602 · 7.51 Impact Factor
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