Results 41 to 50 of about 5,026,485 (166)
Law Behind Second Law of Thermodynamics --Unification with Cosmology-- [PDF]
, 2006 In an abstract setting of a general classical mechanical system as a model for the universe we set up a general formalism for a law behind the second law of thermodynamics, i.e. really for "initial conditions".
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Thermodynamic Analysis of Closed Steady or Cyclic Systems
Entropy, 2015 Closed, steady or cyclic thermodynamic systems, which have temperature variations over their boundaries, can represent an extremely large range of plants, devices or natural objects, such as combined heating, cooling and power plants, computers and data ...
Jim McGovern
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Varying c and Particle Horizons [PDF]
, 2001 We explore what restrictions may impose the second law of thermodynamics on varying speed of light theories. We find that the attractor scenario solving the flatness problem is consistent with the generalized second law at late time.Comment: Latex file ...
Albrecht +33 more
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Exergy-Based Efficiency Assessment of Fans vs. Isentropic Efficiency
International Journal of Turbomachinery, Propulsion and Power, 2023 The efficiency definition allows us to compare two machines with each other. In general, the efficiency is defined as the ratio of usable power to the required power. This raises the question: what is the usable power?
Johannes Brötz +2 more
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Shannon Meets Carnot: Generalized Second Thermodynamic Law
, 2008 The classical thermodynamic laws fail to capture the behavior of systems with energy Hamiltonian which is an explicit function of the temperature. Such Hamiltonian arises, for example, in modeling information processing systems, like communication ...
Blahut R. E. +12 more
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Methods to Calculate Entropy Generation
EntropyEntropy generation, formulated by combining the first and second laws of thermodynamics with an appropriate thermodynamic potential, emerges as the difference between a phenomenological entropy function and a reversible entropy function.
Jude A. Osara, Michael D. Bryant
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Thermoelectric Effects under Adiabatic Conditions
Entropy, 2013 This paper investigates not fully explained voltage offsets observed by several researchers during the measurement of the Seebeck coefficient of high Z materials.
George Levy
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A Second Law for Open Markov Processes
, 2015 In this paper we define the notion of an open Markov process. An open Markov process is a generalization of an ordinary Markov process in which populations are allowed to flow in and out of the system at certain boundary states.
Pollard, Blake S.
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Photons, Bits and Entropy: From Planck to Shannon at the Roots of the Information Age
Entropy, 2017 The present age, which can be called the Information Age, has a core technology constituted by bits transported by photons. Both concepts, bit and photon, originated in the past century: the concept of photon was introduced by Planck in 1900 when he ...
Mario Martinelli
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Holographic Bound From Second Law of Thermodynamics
, 2000 A necessary condition for the validity of the holographic principle is the holographic bound: the entropy of a system is bounded from above by a quarter of the area of a circumscribing surface measured in Planck areas.
Bartnik +6 more
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