Results 121 to 130 of about 3,496,599 (369)

Making Photoresponsive Metal–Organic Frameworks an Effective Class of Heterogeneous Photocatalyst

open access: yesAdvanced Functional Materials, EarlyView.
This review summarizes photoresponsive MOFs for photocatalytic applications, focusing on their capacity to enhance light harvesting, charge transfer, and surface reactions. While existing studies provide foundational insights, emerging characterization techniques enable a deeper understanding of photoresponsive MOFs.
Rui Liu   +3 more
wiley   +1 more source

Revisiting and comparing the Carnot Cycle and the Otto Cycle

open access: yesRevista Brasileira de Ensino de Física
The reversibility of the Carnot Cycle makes it the most efficient thermodynamic cycle to convert energy as heat into work operating between two thermal reservoirs at different temperatures.
Tiago Kroetz
doaj   +1 more source

Comparative Analysis of the Course of Business Cycles and Thermodynamic Cycles

open access: yesEquilibrium, 2011
Mainstream economics tends to perceive economic systems in a mechanistic way, which makes it impossible to grasp the notion of the irreversibility of real economic process­es and thus encourages referring to the achievements of thermodynamics.Although economic equivalents of thermodynamic quantities have been discussed for more than a hundred years, a ...
openaire   +3 more sources

Comprehensive Thermodynamic Analysis of the Humphrey Cycle for Gas Turbines with Pressure Gain Combustion

open access: yesEnergies, 2018
Conventional gas turbines are approaching their efficiency limits and performance gains are becoming increasingly difficult to achieve. Pressure Gain Combustion (PGC) has emerged as a very promising technology in this respect, due to the higher thermal ...
P. Stathopoulos
semanticscholar   +1 more source

A Thermodynamic Theory of Economics [PDF]

open access: yes
An analogy between thermodynamic and economic theories and processes is developed further, following a previous paper published by the author in 1982.
John Bryant
core  

Elucidating Sodium Ion Storage Mechanisms in Hard Carbon Anodes at the Electronic Level

open access: yesAdvanced Functional Materials, EarlyView.
High‐resolution, multi‐frequency continuous wave, and pulsed Electron Paramagnetic Resonance (EPR) spectroscopy uncover the intricate Na ion storage mechanisms in hard carbon. This study reveals the coexistence of Na ion intercalation and solvent co‐intercalation, alongside a subsequent transition of Na ions from ionic to quasi‐metallic to metallic ...
Qingbing Xia   +5 more
wiley   +1 more source

Some features of bypass engine operation process with separate exhaust nozzles

open access: yesНаучный вестник МГТУ ГА, 2016
In the article some equations are derived to establish the relationships between the thermodynamic cycle parameters applying to bypass engines with separate exhaust nozzles. Necessary calculations are made and the main dependences are analyzed.
V. V. Medvedev, V. T. Shulekin
doaj  

Onsager coefficients of a Brownian Carnot cycle

open access: yes, 2010
We study a Brownian Carnot cycle introduced by T. Schmiedl and U. Seifert [Europhys. Lett. \textbf{81}, 20003 (2008)] from a viewpoint of the linear irreversible thermodynamics.
A. Benjamin   +31 more
core   +2 more sources

Artificial Modulation of the Hydrogen Evolution Reaction Kinetics via Control of Grain Boundaries Density in Mo2C Through Laser Processing

open access: yesAdvanced Functional Materials, EarlyView.
A laser‐driven strategy enables precise microstructural modulation of Mo₂C, achieving nanoscale grain control (15.6 ± 5 nm) and an ultrahigh grain boundary density (130 µm−1). Moreover, high‐angle grain boundaries enhance active sites, facilitate electron transport, and optimize hydrogen adsorption kinetics, significantly reducing overpotential.
Seok‐Ki Hyeong   +13 more
wiley   +1 more source

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