Results 91 to 100 of about 12,282,130 (266)
ChemSusChem, EarlyView.In this study, tartaric acid diamides are explored for thermal energy storage with melting temperatures ranging from 130 to 190 °C and melting enthalpies reaching 173 J g−1. With the aid of differential scanning calorimetry, thermogravimetric analysis, and variable‐temperature infrared spectroscopy, various perspectives and limitations of designing ...
Magdalena Gwóźdź +4 more
wiley +1 more source
The Isoperimetric Problem in Carnot-Caratéodory Spaces
Bruno Pini Mathematical Analysis Seminar, 2017 We present some recent results obtained on the isoperimetric problem in a class of Carnot-Carathéodory spaces, related to the Heisenberg group. This is the framework of Pansu’s conjecture about the shape of isoperimetric sets.
Valentina Franceschi
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Exploring Low‐Global Warming Potential Refrigerants for Medium‐Charge Systems
Energy Technology, EarlyView.This study evaluates 15 low‐global warming potential (GWP) refrigerants as alternatives for medium‐charge systems, focusing on environmental impacts, operational performance, and system design integration. Key findings reveal R‐447A's suitability for standard climates and R‐454B's advantages in high ambient conditions, providing actionable guidance for
Fadi Alsouda +3 more
wiley +1 more source
Minimal surfaces in the Heisenberg group
, 2006 We investigate the minimal surface problem in the three dimensional Heisenberg group, H, equipped with its standard Carnot-Caratheodory metric. Using a particular surface measure, we characterize minimal surfaces in terms of a sub-elliptic partial ...
Pauls, Scott D.
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Energy Science &Engineering, EarlyView.ABSTRACT This study delves into exploring how pinhole size affects both the electrochemical efficiency and hydrogen leakage within proton exchange membrane fuel cells (PEMFCs). The researchers devised a comprehensive multiphysics field model for the PEMFC and employed the finite element method to simulate various pinhole diameters, evaluating their ...
Junyi Chen +4 more
wiley +1 more source
Abstract and Applied Analysis, 2014 Let {X1,X2,…,Xm} be the basis of space of horizontal vector fields in a Carnot group G=(Rn ...
Pengcheng Niu, Kelei Zhang
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Mass Spectrometry Reviews, EarlyView.ABSTRACT Complex organic mixtures are found in many areas of research, such as energy, environment, health, planetology, and cultural heritage, to name but a few. However, due to their complex chemical composition, which holds an extensive potential of information at the molecular level, their molecular characterization is challenging.
Charlotte Mase +5 more
wiley +1 more source
Rigidity of quasiconformal maps on Carnot groups [PDF]
Mathematical Proceedings of the Cambridge Philosophical Society, 2016 AbstractWe show that quasiconformal maps on many Carnot groups must be biLipschitz. In particular, this is the case for 2-step Carnot groups with reducible first layer. These results have implications for the rigidity of quasiisometries between negatively curved solvable Lie groups.
openaire +3 more sources
Autonomous Artificial Molecular Motors and Pumps
ChemSystemsChem, EarlyView.Autonomous energy consumption is the only way to introduce molecular motors into more sophisticated, larger systems, capable of life‐like behavior. We reviewed a selection of the most recent advances in the field molecular motors focusing on those capable of performing continuous and autonomous motion under constant experimental conditions, that is ...
Chiara Taticchi +2 more
wiley +1 more source
Analysis and Geometry in Metric SpacesIn the realm of sub-Riemannian manifolds, a relevant question is: what are the metric lines (isometric embedding of the real line)? The space of kk-jets of a real function of one real variable xx, denoted by Jk(R,R){J}^{k}\left({\mathbb{R}},{\mathbb{R}}),
Bravo-Doddoli Alejandro
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