Results 131 to 140 of about 5,189 (241)

A Bio‐Based Chiroptical Overcrowded Alkene From Flavanone: Photoreactivity and Theoretical Investigation

Chemistry – A European Journal, EarlyView.
A sustainable route to photoresponsive molecular systems is achieved using the bio‐based flavanone (‐)‐isolonchocarpin from Tephrosia vogelii. Through McMurry homocoupling and light‐driven 6‐π‐electrocyclization, an overcrowded alkene and a fluorescent O‐heterocyclic phenanthrene are synthesized.
Deryl H. Limawan, Adrien Combe, Anthony Bongso, Bayu Dwiputra, Atthar L. Ivansyah, Roza R. Weber, Charlotte N. Stindt, Robby Roswanda, Ben L. Feringa   +8 more
wiley   +1 more source

How Viscoelastic Effects Impact Polymer Fluid Flow in Porous Media. [PDF]

Transp Porous Media
Wang Y, Suo S, Cuttle C, MacMinn CW, Blunt MJ, O'Sullivan C.   +5 more
europepmc   +1 more source

The Ontological Hierarchy of Mathematics and Physics: First-Principle Derivation of Topological Invariants and Geometric Scale from the Generalized Collatz Map

This paper demonstrates a strict, unidirectional ontological hierarchy that eliminatesarbitrary empirical constants and fine-tuned parameters from foundational mathematicsand physics. Rather than treating topological invariants as structures imported ontonumbers, or geometric parameters like π as primitive values, we construct a deterministic,self ...
openaire   +1 more source

Optimization of 3D‐Printed Structured Packings—Current State and Future Developments

Chemie Ingenieur Technik, EarlyView.
This paper gives an overview about structured packing development for distillation, surveying heuristic development cycles, computational fluid dynamics simulations, and additive manufacturing techniques. The emerging application of shape optimization to improve packings is emphasized, and its benefits, impact, and limitations are discussed.
Dennis Stucke, Sebastian Blauth, Christian Leithäuser, Thomas Grützner   +3 more
wiley   +1 more source

Cognitive near-singularity: a possibility theorem and a witness-based protocol with a corpus case study. [PDF]

Front Artif Intell
Williams AE.
europepmc   +1 more source

The Benjamin–Ono Equation in the Zero‐Dispersion Limit for Rational Initial Data: Generation of Dispersive Shock Waves

Communications on Pure and Applied Mathematics, EarlyView.
ABSTRACT The leading‐order asymptotic behavior of the solution of the Cauchy initial‐value problem for the Benjamin–Ono equation in L2(R)$L^2(\mathbb {R})$ is obtained explicitly for generic rational initial data u0$u_0$. An explicit asymptotic wave profile uZD(t,x;ε)$u^\mathrm{ZD}(t,x;\epsilon)$ is given, in terms of the branches of the multivalued ...
Elliot Blackstone, Louise Gassot, Patrick Gérard, Peter D. Miller   +3 more
wiley   +1 more source

Decoupling Size from Shape: Cellular Sheaf Laplacians as Ligand Geometry Descriptors for Binding Affinity Prediction. [PDF]

Int J Mol Sci
Akgüller Ö, Balcı MA, Cioca G.
europepmc   +1 more source

Stability of Viscous Three‐Dimensional Stratified Couette Flow via Dispersion and Mixing

Communications on Pure and Applied Mathematics, EarlyView.
ABSTRACT This article explores the stability of stratified Couette flow in the viscous 3d$3d$ Boussinesq equations. In this system, mixing effects arise from the shearing background, and gravity acts as a restoring force leading to dispersive internal gravity waves.
Michele Coti Zelati, Augusto Del Zotto, Klaus Widmayer   +2 more
wiley   +1 more source

Integral Betti signatures of brain, climate and financial networks compared to hyperbolic, Euclidean and spherical models. [PDF]

Sci Rep
Caputi L, Pidnebesna A, Hlinka J.
europepmc   +1 more source

Mathematical Proof of the Dynamic Limit Cycle, Möbius Topology, and L p Penetration Section in the V/E/O Geometric Iteration System

This paper presents a theoretical breakthrough and a paradigm upgrade based on our previous work concerning the V/E/O three-operator geometric iteration system and the discovery of geometric fixed points. The transcendental shape parameter $$p=\log_{\frac{25}{18}}4\approx4.2200$$ was algebraically derived in our prior research.
openaire   +1 more source