Results 71 to 80 of about 142,106 (279)

Association of Finite-Time Thermodynamics and a Bond-Graph Approach for Modeling an Endoreversible Heat Engine

Entropy, 2012
In recent decades, the approach known as Finite-Time Thermodynamics has provided a fruitful theoretical framework for the optimization of heat engines operating between a heat source (at temperature ) and a heat sink (at temperature ).
Michel Feidt, Christelle Périlhon, Georges Descombes, Amin El-Bakkali, Yuxiang Dong   +4 more
doaj   +1 more source

Thermodynamics of small superconductors with fixed particle number

, 2012
The Variation After Projection approach is applied for the first time to the pairing hamiltonian to describe the thermodynamics of small systems with fixed particle number.
Danilo Gambacurta, Denis Lacroix, P. Ring, R. Rossignoli   +3 more
core   +3 more sources

Dual‐Site Ru Single‐Atoms and RuP Nanoclusters on N, P, and B Co‐Doped Porous Carbon for Efficient Alkaline HER and AEM Water Electrolysis

Advanced Functional Materials, EarlyView.
Ru single atoms and RuP nanoclusters are co‐anchored in N, P, and B co‐doped porous carbon nanospheres via in situ carbonization/phosphidation of a boronate polymer precursor. RuP activates water, while nearby Ru single atoms accelerate H2 formation through H* transfer. The catalyst delivers low overpotential and high durability in alkaline HER and AEM
Xiaohong Wang, Juguo Dai, Dongxu Li, Jianghua Wu, Hucheng Fu, Yiting Xu, Xueqiang Qi, Qian Xue, Yanbin Shen, Xiaoqing Pan, Conghui Yuan, Shuifen Xie, Andreu Cabot, Lizong Dai   +13 more
wiley   +1 more source

Time-Optimal Frictionless Atom Cooling in Harmonic Traps

, 2012
Frictionless atom cooling in harmonic traps is formulated as a time-optimal control problem and a synthesis of optimal controlled trajectories is obtained.
Li, Jr-Shin, Schaettler, Heinz, Stefanatos, Dionisis   +2 more
core   +1 more source

Virial statistical description of non-extensive hierarchical systems [PDF]

, 2006
In a first part the scope of classical thermodynamics and statistical mechanics is discussed in the broader context of formal dynamical systems, including computer programmes. In this context classical thermodynamics appears as a particular theory suited
Antonov, Coleman, Daniel Pfenniger, Falconer, Fermi, Gemmer, Gross, Hénon, Larson, Laskar, Lynden-Bell, Lynden-Bell, Mandelbrot, Nugeyre, Padmanabhan, Pfenniger, Scalo, Shannon, Tribus   +18 more
core   +3 more sources

Finite time thermodynamic coupling in a biochemical network [PDF]

Systems and Synthetic Biology, 2014
The paper describes some thermodynamic constrains and relations in biochemical or metabolic network and provides a basis for entropy enthalpy compensation. Conventional definition of macroscopic forces and fluxes leads to a paradox namely, non-existence of positive efficiency of a chemically driven process.
openaire   +2 more sources

Electrocatalytic Reduction of CO2 to Ethylene: Catalyst Design and Synchrotron‐Based Characterizations

Advanced Functional Materials, EarlyView.
This review evaluates strategies for electrochemical CO2 reduction to ethylene, focusing on copper‐based catalyst design and microenvironment modulation to achieve industrial‐grade performance. By leveraging operando synchrotron‐based characterizations, we provide a multiscale understanding of dynamic structural transformations and key reaction ...
Meng Zhang, Zuolong Chen, Yimin A. Wu
wiley   +1 more source

Cooling by Heating: Restoration of the Third Law of Thermodynamics

, 2015
We have made a simple and natural modification of a recent quantum refrigerator model presented by Cleuren et al. in Phys. Rev, Lett.108, 120603 (2012).
Bergli, Joakim, Galperin, Y. M., Sørdal, Vegard B.   +2 more
core   +1 more source

Staggered Fermion Thermodynamics using Anisotropic Lattices [PDF]

, 2002
Numerical simulations of full QCD on anisotropic lattices provide a convenient way to study QCD thermodynamics with fixed physics scales and reduced lattice spacing errors.
Bernard, de Forcrand, Gottlieb, Karsch, L. Levkova   +4 more
core   +3 more sources

Actuating and Sensing Composites of Liquid Crystal Elastomers and Poly(ionic liquid)s

Advanced Functional Materials, EarlyView.
Ionic conductive, mechanically tough, flexible, and stretchable filaments of a composite material comprising a liquid crystal elastomer and a poly(ionic liquid) are produced through 3D printing, which exhibit large actuation strain under stimulation and electrical resistance variation in response to deformation or environmental condition changes. Their
Zeping Liu, Xiaofeng Zheng, Shaoxia Zhang, Long Xu, Meng Liu, Jeremy Baribeault St‐Germain, Yue Zhao   +6 more
wiley   +1 more source