Results 61 to 70 of about 14,219 (239)

Multicomponent Synthesis of Fluorine‐Containing Bioactive Compounds and Drugs

open access: yesEuropean Journal of Organic Chemistry, EarlyView.
Multicomponent reactions are robust synthetic tools to assamble complex polyheterocycles and other interesting molecular architectures with potential application in medicinal chemistry, including their fluorine‐containing analogues. Fluorine atoms placed strategically into bioactive molecules often enhance essential pharmacokinetic parameters like ...
Ivette Morales‐Salazar   +7 more
wiley   +1 more source

Large time behavior for the heat equation on Carnot groups

open access: yes, 2012
We first generalize a decomposition of functions on Carnot groups as linear combinations of the Dirac delta and some of its derivatives, where the weights are the moments of the function.
Rossi, Francesco
core   +1 more source

Curvature exponent and geodesic dimension on Sard-regular Carnot groups

open access: yesAnalysis and Geometry in Metric Spaces
In this study, we characterize the geodesic dimension NGEO{N}_{{\rm{GEO}}} and give a new lower bound to the curvature exponent NCE{N}_{{\rm{CE}}} on Sard-regular Carnot groups.
Golo Sebastiano Nicolussi, Zhang Ye
doaj   +1 more source

Exploring Low‐Global Warming Potential Refrigerants for Medium‐Charge Systems

open access: yesEnergy 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

Lipschitz extensions into Jet space Carnot groups [PDF]

open access: yes, 2009
The aim of this article is to prove a Lipschitz extension theorem for partially defined Lipschitz maps to jet spaces endowed with a left-invariant sub-Riemannian Carnot-Carath\'eodory distance.
Wenger, Stefan, Young, Robert
core  

Almost uniform domains and Poincaré inequalities

open access: yesTransactions of the London Mathematical Society, 2021
Here we show existence of many subsets of Euclidean spaces that, despite having empty interior, still support Poincaré inequalities with respect to the restricted Lebesgue measure.
Sylvester Eriksson‐Bique, Jasun Gong
doaj   +1 more source

Nonlinear elliptic equations on Carnot groups

open access: yesRevista de la Real Academia de Ciencias Exactas, Físicas y Naturales. Serie A. Matemáticas, 2016
This article concerns a class of elliptic equations on Carnot groups depending on one real positive parameter and involving a subcritical nonlinearity (for the critical case we refer to G. Molica Bisci and D. Repov , Yamabe-type equations on Carnot groups, Potential Anal. 46:2 (2017), 369-383; arXiv:1705.10100 [math.AP]).
Ferrara M, Molica Bisci G, Repovs R
openaire   +6 more sources

Multi‐Physics Pinhole Size Tolerance Analysis on the Leakage Characteristics and Performance of Proton Exchange Membrane Fuel Cells

open access: yesEnergy 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

Cordes nonlinear operators in Carnot groups

open access: yesElectronic Journal of Differential Equations, 2015
Our aim is to obtain L^p estimates for the second-order horizontal derivatives of the solutions for a nondivergence form nonlinear equation in Carnot groups.
Giuseppe Di Fazio   +1 more
doaj  

Direct Assembly of Micrometer‐Long Polymeric Cylinders in Water via Supramolecular Sticker Engineering

open access: yesMacromolecular Rapid Communications, EarlyView.
Engineering order at the nanoscale: Tailored design of PDI and TEG‐functionalized poly(N,N‐dimethylacrylamide) enables direct assembly of micrometer‐long nanocylinders in water. TEG prevents clustering, while the polymer chain length governs the morphology.
Sébastien Berruée   +6 more
wiley   +1 more source

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