Results 81 to 90 of about 17,485 (243)
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
Quantum mechanical bound for efficiency of quantum Otto heat engine
, 2019 The second law of thermodynamics constrains that the efficiency of heat engines, classical or quantum, cannot be greater than the universal Carnot efficiency.
Chun, Hyun-Myung +3 more
core +1 more source
On the ambiguity of an ideal gas entropy concept
Известия высших учебных заведений: Проблемы энергетики, 2020 Based on a critical analysis of the existing characteristics of an ideal gas and the theory of thermodynamic potentials, the article considers its new model, which includes the presence of an ideal gas in addition to kinetic energy of potential (chemical)
V. G. Kiselev
doaj +1 more source
Solution‐Based 3D Printing of Thermoelectrics: Advances and Opportunities
Advanced Science, Volume 12, Issue 46, December 11, 2025.Solution 3D printing presents a versatile platform for fabricating conformal and flexible thermoelectric devices, enabling efficient thermal energy harvesting. This review summarizes recent advancements in thermoelectric inks, materials, device architectures, performance metrics, and practical applications, while also addressing current challenges and ...
Minzhi Du +4 more
wiley +1 more source
Efficiency of harmonic quantum Otto engines at maximal power
, 2018 Recent experimental breakthroughs produced the first nano heat engines that have the potential to harness quantum resources. An instrumental question is how their performance measures up against the efficiency of classical engines. For single ion engines
Deffner, Sebastian
core +1 more source
Bipolar Disorders, Volume 27, Issue 8, Page 545-550, December 2025.ABSTRACT Objectives To explore the clinical impact of social determinants of health (SDoH) stress in bipolar disorder (BD) course of illness and to explore potential gender differences in SDoH stress endorsement. Methods 2280 individuals living with BD type I or II (62% women; 67.5% BD‐I) participating in the Mayo Clinic Bipolar Biobank who completed a
Manuel Gardea‐Resendez +19 more
wiley +1 more source
Thermodynamic universality of quantum Carnot engines
, 2015 The Carnot statement of the second law of thermodynamics poses an upper limit on the efficiency of all heat engines. Recently, it has been studied whether generic quantum features such as coherence and quantum entanglement could allow for quantum devices
Deffner, Sebastian, Gardas, Bartłomiej
core +1 more source
Neurogastroenterology &Motility, Volume 37, Issue 12, December 2025.The SLR maneuver is a valuable component of GERD evaluation. By establishing optimal thresholds for both effective EGJ challenge and accurate GERD prediction, we provide another step for standardized implementation in clinical practice. ABSTRACT Background Gastroesophageal reflux disease (GERD) arises from dysfunction of the anti‐reflux barrier.
Stefano Siboni +7 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