Results 101 to 110 of about 2,872,752 (258)
Dimensionality and geometry effects on a quantum carnot engine efficiency
Revista de Ciencias Tecnológicas, 2019 We calculate the efficiency of a quantum Carnot cycle for a particle confined in two different infinite potential wells, a cylindrical potential well of variable radius and a two-dimensional square potential well with a periodicity in one of it sides. We
Hiram Kalid Herrera Alcantar +4 more
doaj +1 more source
Where Mathematical Symbols Come From
Topics in Cognitive Science, EarlyView.Abstract There is a sense in which the symbols used in mathematical expressions and formulas are arbitrary. After all, arithmetic would be no different if we would replace the symbols ‘+$+$’ or ‘8’ by different symbols. Nevertheless, the shape of many mathematical symbols is in fact well motivated in practice.
Dirk Schlimm
wiley +1 more source
Efficiency at maximum power: An analytically solvable model for stochastic heat engines
, 2007 We study a class of cyclic Brownian heat engines in the framework of finite-time thermodynamics. For infinitely long cycle times, the engine works at the Carnot efficiency limit producing, however, zero power. For the efficiency at maximum power, we find
Feynman R. P. +6 more
core +1 more source
AIChE Journal, Volume 71, Issue 7, July 2025.Abstract Although thermally coupled distillation (TCD) exhibits strong energy efficiency, the possibility of utility cost savings remains debatable. TCD designs that do not consider vapor transport can underestimate costs, making section rearrangement crucial to find more operable configurations.
Anqing Wang +2 more
wiley +1 more source
Alzheimer's &Dementia, Volume 21, Issue 7, July 2025.Abstract INTRODUCTION The Down syndrome‐associated Alzheimer's disease (DSAD) autosomal dominant Alzheimer's disease (ADAD) 2024 Conference in Barcelona, convened under an Alzheimer's Association International Society to Advance Alzheimer's Research and Treatment (ISTAART) grant through the Down syndrome and Alzheimer's disease (AD) Professional ...
Neus Falgàs +58 more
wiley +1 more source
Impact of Alzheimer's disease on sleep in adults with Down syndrome
Alzheimer's &Dementia, Volume 21, Issue 7, July 2025.Abstract INTRODUCTION Down syndrome (DS) is a genetic form of Alzheimer's disease (AD), with a high prevalence of sleep disorders, but data in adults with DS and dementia are lacking. We aim to assess sleep in adults with DS across the AD continuum. METHODS We studied 78 healthy controls and 229 adults with DS (154 asymptomatic, 25 with prodromal AD ...
Sandra Giménez +23 more
wiley +1 more source
The History and Perspectives of Efficiency at Maximum Power of the Carnot Engine
Entropy, 2017 Finite Time Thermodynamics is generally associated with the Curzon–Ahlborn approach to the Carnot cycle. Recently, previous publications on the subject were discovered, which prove that the history of Finite Time Thermodynamics started more than sixty ...
Michel Feidt
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Benzochalcogenodiazoles, Synthesis, and Applications in Medicinal Chemistry and Photomedicine
European Journal of Organic Chemistry, Volume 28, Issue 23, June 23, 2025.Benzochalcogenodiazoles (BXD) including benzoxadiazoles, benzothiadiazoles, and benzoselenadiazoles are initially mainly designed for optoelectronic materials as electron‐deficient cores. Nevertheless, they are now extending their application to biology.
Jean‐Elie Zheng +2 more
wiley +1 more source
EDWARDS' REFERENCE CYCLE FOR INTERNAL AND EXTERNAL COMBUSTION ENGINES
Известия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2014 Useful physical regularities of a reversible thermodynamic cycle for heat engines have been established in the paper. The engines are using fuel combustion products as a heat source, and the environment - as a heat sink that surpasses Carnot cycle ...
A. E. Piir
doaj
Applied SciencesSpain’s energy transition poses the dual challenge of managing renewable curtailment and enhancing the competitiveness of concentrated solar power (CSP) technologies. This study evaluates the suitability of replacing molten salts with solid particles for
Sergio González-Barredo +1 more
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