Results 61 to 70 of about 17,485 (243)
Effect of Machine Entropy Production on the Optimal Performance of a Refrigerator
Entropy, 2020 The need for cooling is more and more important in current applications, as environmental constraints become more and more restrictive. Therefore, the optimization of reverse cycle machines is currently required.
Michel Feidt, Monica Costea
doaj +1 more source
Attaining Carnot efficiency with quantum and nanoscale heat engines
npj Quantum Information, 2021 A heat engine operating in the one-shot finite-size regime, where systems composed of a small number of quantum particles interact with hot and cold baths and are restricted to one-shot measurements, delivers fluctuating work.
Mohit Lal Bera +2 more
doaj +1 more source
ChemMedChem, EarlyView.A streamlined Ullmann‐Goldberg strategy enabled the synthesis of benzo[b]thiophene‐2‐carboxamides, promising ligands of the pro‐inflammatory RAGE receptor involved in inflammaging and age‐related diseases. LC‐MS, NMR, X‐ray and DFT studies elucidated the copper‐catalyzed mechanism. The lead compound, 3t’, shows inhibitory activity on the sRAGE/AGE2‐BSA
Lisa Bonin +10 more
wiley +1 more source
, 2015 [...] By the beginning of the 20th century, the principles of thermodynamics were summarized into the so-called four laws, which were, as it turns out, definitive negative answers to the doomed quests for perpetual motion machines.
Apertet, Yann +3 more
core +1 more source
One-Particle Representation of Heat Conduction Described within the Scope of the Second Law. [PDF]
PLoS ONE, 2016 The Carnot cycle and its deduction of maximum conversion efficiency of heat inputted and outputted isothermally at different temperatures necessitated the construction of isothermal and adiabatic pathways within the cycle that were mechanically ...
Christopher Gunaseelan Jesudason
doaj +1 more source
Achieving Carnot efficiency in a finite-power Brownian Carnot cycle with arbitrary temperature difference [PDF]
, 2022 Kosuke Miura +5 more
openalex +1 more source
ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.Thermal charging cells (TCS) face two main challenges that limit their practical applications: 1) Still lacking the systems suitable for operation under higher temperature environments, and 2) there are limitations in the self‐sustaining performance of continuous discharge under temperature differences, which holds critical significance for the real ...
Tingting Meng, Yimin Xuan, Yunjie Xiong
wiley +1 more source
European Journal of Organic Chemistry, EarlyView.Ready access to six‐membered phosphorus heterocycles through copper‐catalyzed intramolecular hydrophosphorylation of ortho‐alkynyl secondary phosphine oxides is described. The reaction proceedes with high regio‐ and stereoselectivity. An atom‐economic copper‐catalyzed intramolecular hydrophosphorylation of ortho‐alkynyl secondary phosphine oxides ...
Hamdi Sanaa +3 more
wiley +1 more source
Optimizing thermodynamic trajectories using evolutionary and gradient-based reinforcement learning [PDF]
, 2019 Using a model heat engine, we show that neural network-based reinforcement learning can identify thermodynamic trajectories of maximal efficiency. We consider both gradient and gradient-free reinforcement learning.
Beeler, Chris +5 more
core
Dispersion‐Less Dissipative Soliton Fiber Laser
Laser &Photonics Reviews, EarlyView.A dispersion‐less fiber laser architecture generates high‐energy, pedestal‐free picosecond pulses without resorting to conventional pulse stretching. This energy‐managed laser achieves remarkable flexibility in pulse parameters, delivering up to 0.54 μJ$\mathrm{\mu}\mathrm{J}$ pulses with minimal spectral distortion using standard telecom components ...
Mostafa I. Mohamed +2 more
wiley +1 more source