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Takuya Yamano   Dr.  University Lecturer 
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Takuya Yamano published an article in December 2017.
Top co-authors See all
T. Nagai

201 shared publications

T. Kubo

191 shared publications

M. Shimada

190 shared publications

M. Nishimura

166 shared publications

T. IMANISHI

152 shared publications

28
Publications
8
Reads
0
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22
Citations
Publication Record
Distribution of Articles published per year 
(1970 - 2017)
Total number of journals
published in
 
23
 
Publications See all
Article 2 Reads 0 Citations Effect of temperature-dependent energy levels on exergy Takuya Yamano Published: 13 December 2017
Journal of Physics Communications, doi: 10.1088/2399-6528/aa95e4
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The performances of solar cells and thermoelectric materials are governed by thermodynamics. The material properties of these have temperature dependence due to thermal expansions of lattices and an effect of electron–phonon coupling etc. The temperature-dependent energy levels has been included in statistical mechanics, naturally requiring a rectification of the second law of thermodynamics with an effective heat. In such a framework, we show that exergy associated with internal energy of isolated systems can be increased in irreversible processes. We furthermore see how the effect of the temperature-dependent energy levels appears in the thermodynamic performance in terms of the second law efficiency.
CONFERENCE-ARTICLE 2 Reads 0 Citations A lower bound on work extraction probability prescribed by nonequilibrium work relation Takuya Yamano Published: 20 November 2017
Proceedings, doi: 10.3390/ecea-4-05015
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In nonequilibrium processes, work extraction from a system is subject to random fluctuations associated with the statistical distribution prescribed by its environment. The probability of extracting work above a given arbitrary threshold can be a measure of restriction imposed by experimental circumstances. We present a lower bound for the probability when the work value lies in a finite range. For the case of unrestricted maximum work, the lower bound gets larger as the free energy difference between initial and final states becomes larger. We point out also that an upper bound previously reported in the literature is a direct consequence of the well-known second mean value theorem for definite integrals.

Article 1 Read 0 Citations Localized traveling wave solution for a logarithmic nonlinear Schrödinger equation Takuya Yamano Published: 01 December 2016
Wave Motion, doi: 10.1016/j.wavemoti.2016.07.005
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Article 0 Reads 0 Citations Efficiencies of thermodynamics when temperature-dependent energy levels exist Takuya Yamano Published: 01 January 2016
Physical Chemistry Chemical Physics, doi: 10.1039/C5CP07572F
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Based on a generalized form of the second law of thermodynamics, in which the temperature-dependent energy levels of a system are appropriately included in entropy generation, we show that the effect reasonably appears in efficiencies of thermodynamic processes. Based on a generalized form of the second law of thermodynamics, in which the temperature-dependent energy levels of a system are appropriately included in entropy generation, we show that the effect reasonably appears in efficiencies of thermodynamic processes.
CONFERENCE-ARTICLE 1 Read 0 Citations Temperature-dependent energy levels and the second law formulation for engineering devices Takuya Yamano Published: 13 November 2015
2nd International Electronic Conference on Entropy and Its Applications, doi: 10.3390/ecea-2-A011
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We shall give an overview, within a scope of the author's knowledge, on
fundamental importance of the temperature dependency of energy levels in materials
in quantifying heat dissipated in thermodynamically operated devices. After a brief review of the
relevant studies of temperature dependency in semiconductors, we point out that entropy produced
or heat dissipated in thermoelectric devices based on thermoelectric effects such as Peltier, Seebeck
and Thomson can be reformulated by inclusion of the effect of temperature-dependent energy levels in
materials (semicondactors). Statistical mechanics consideration for the origin of the temperature
dependent energy levels is also given based on a general ensemble theory.

CONFERENCE-ARTICLE 2 Reads 0 Citations A Note on Bound for Jensen-Shannon Divergence by Jeffreys Takuya Yamano Published: 03 November 2014
1st International Electronic Conference on Entropy and Its Applications, doi: 10.3390/ecea-1-b002
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The Jensen-Shannon divergence JS(p;q) is a similarity measure between two probability distributions p and q. It is presently used in varied disciplines. In this presentation, we provide a lower bound on the Jensen-Shannon divergence by the Jeffrery's J-divergence when p_i≥q_i is satisfied. In the original Lin's paper, the upper bound in terms of the J-divergence was the quarter of it. Recently, the shaper one was reported by Crooks. We discuss upper bounds by transcendental functions of Jeffreys by comparing those values for a binary distribution.