Results 41 to 50 of about 2,466 (181)

From the Discovery of the Giant Magnetocaloric Effect to the Development of High‐Power‐Density Systems

Advanced Materials Technologies, EarlyView.
The article overviews past and current efforts on caloric materials and systems, highlighting the contributions of Ames National Laboratory to the field. Solid‐state caloric heat pumping is an innovative method that can be implemented in a wide range of cooling and heating applications.
Agata Czernuszewicz, Yaroslav Mudryk, Jun Cui, Lucas Griffith, Duane D. Johnson, Julie Slaughter   +5 more
wiley   +1 more source

Donor‐Strength‐Driven Evolution From Charge‐Transfer to Polymethine Excited States in CurcBF2 Derivatives

Advanced Optical Materials, EarlyView.
Donor strength governs the excited‐state character and TADF behavior of donor‐acceptor‐donor borondifluoride curcuminoid derivatives. Increasing donor strength drives a transition from charge‐transfer TADF to a zwitterionic polymethine structure with predominantly local excited‐state emission and suppressed TADF.
Anthony D'Aléo, Guillaume Michaluszko, Amandine Coron, Dae‐Hyeon Kim, Alban de Gary, Danillo Valverde, Elena Zaborova, Emilie Couzigné, Lorry Engel, Loïc Mager, Gabriel Canard, Chihaya Adachi, Yoann Olivier, Jean‐Charles Ribierre   +13 more
wiley   +1 more source

On the Lie Algebra of polarizable Carnot groups [PDF]

Analysis and Mathematical Physics, 2020
Let \(G\) be a Carnot group equipped with a left-invariant sub-Riemannian metric, induced by an inner product \(\langle \cdot, \cdot \rangle\) on the first layer of its Lie algebra \(\mathfrak{g}\). The metric induces a family of \(p\)-sub-Laplacians \(\Delta_p\) on \(G\), where \(\Delta_2\) is the usual sub-Laplacian. Following [\textit{Z. M.
openaire   +2 more sources

Uniform Gaussian Bounds for Subelliptic Heat Kernels and an Application to the Total Variation Flow of Graphs over Carnot Groups

Analysis and Geometry in Metric Spaces, 2013
In this paper we study heat kernels associated with a Carnot group G, endowed with a family of collapsing left-invariant Riemannian metrics σε which converge in the Gromov- Hausdorff sense to a sub-Riemannian structure on G as ε→ 0.
Capogna Luca, Citti Giovanna, Manfredini Maria   +2 more
doaj   +1 more source

The Peregrine Breather on the Zero-Background Limit as the Two-Soliton Degenerate Solution: An Experimental Study

Frontiers in Physics, 2021
Solitons are coherent structures that describe the nonlinear evolution of wave localizations in hydrodynamics, optics, plasma and Bose-Einstein condensates.
Amin Chabchoub, Amin Chabchoub, Amin Chabchoub, Alexey Slunyaev, Alexey Slunyaev, Norbert Hoffmann, Norbert Hoffmann, Frederic Dias, Frederic Dias, Bertrand Kibler, Goëry Genty, John M. Dudley, Nail Akhmediev   +12 more
doaj   +1 more source

Maximizing the Energy Output of Soft Electrohydraulic Generators

Advanced Science, EarlyView.
Many energy resources cannot be viably harvested with electromagnetic generators. This article evaluates the potential of soft electrohydraulic generators as an alternative approach for energy capture. An analytical model charts their operational limits and a rigorous experimental study results in new performance benchmarks with maximum specific energy
Sophie Kirkman, Ingemar Schmidt, Lawrence T. Smith, Steven L. Zhang, Shane K. Mitchell, Soo Jin Adrian Koh, Philipp Rothemund, Christoph Keplinger   +7 more
wiley   +1 more source

Curvature exponent and geodesic dimension on Sard-regular Carnot groups

Analysis 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

Immobilization of Alginate Microbeads With Whole‐Cells Expressing Nitrilase for Continuous Nicotinic Acid Production in Chip Millireactor

Biotechnology and Bioengineering, EarlyView.
ABSTRACT The biocatalytic production of nicotinic acid using nitrilases has emerged as a promising alternative to conventional chemical synthesis, offering improved selectivity and environmental sustainability. In this study, we developed a continuous‐flow millireactor system employing Escherichia coli cells expressing a nitrilase from Paraburkholderia
Jonathan Bassut, Emina Mehić, Luana Cuvillier, Carine Vergne‐Vaxelaire, Jean‐Louis Petit, Maïté Michaud, Zoé Anxionnaz‐Minvielle, Anne Zaparucha, Guillaume Nonglaton   +8 more
wiley   +1 more source

Access to Uncharted (Ethoxy)difluoromethylated‐Containing Tetrahydrofurans by Hydrogenation

Chemistry – A European Journal, EarlyView.
A Pd/C‐catalyzed selective hydrogenation of (ethoxy)difluoromethylated‐containing tetrahydrofurans was achieved. Depending on the pressure of H2, a divergent process led to either cis CF2CO2Et‐containing tetrahydrofurans or valuable α,α‐difluoro‐β‐hydroxyesters, offering key fluorinated building blocks for drug discovery while keeping the CF2CO2Et ...
Thibaud Charvillat, Victor Levet, Patrick Bernardelli, Marc Daumas, Hassan Oulyadi, Muriel Sebban, Vincent Ferey, Tatiana Besset   +7 more
wiley   +1 more source

Rectifiability in Carnot Groups

, 2022
This thesis is devoted to the study of the theory of rectifiability of sets and measures in the non smooth context of Carnot groups. The focus is on the study of the notion of P-rectifiability and its relation with other notions of rectifiability in Carnot groups.
openaire   +2 more sources