Results 91 to 100 of about 86,518 (263)

Feynman integrals and critical modular $L$-values

, 2016
Broadhurst conjectured that the Feynman integral associated to the polynomial corresponding to $t=1$ in the one-parameter family $(1+x_1+x_2+x_3)(1+x_1^{-1}+x_2^{-1}+x_3^{-1})-t$ is expressible in terms of $L(f,2),$ where $f$ is a cusp form of weight $3$
Samart, Detchat
core   +1 more source

Untangling the Mechanisms in Magneto‐Electrocatalytic Oxygen Evolution

Small, EarlyView.
Magnetic fields can enhance the oxygen evolution reaction in electrocatalytic water‐splitting for green‐H2. Yet, commercialization cannot be realized until the underlying magneto‐electric mechanisms are understood. This work uses reactor orientation to untangle these mechanisms. Lorentz force is shown to control metallic plates, while spin‐polarization
Amy Radford, Dorottya Szalay, Qiming Chen, Mengfan Ying, Mingyu Luo, Xuelei Pan, Michail Stamatakis, Yiyang Li, Chen Wu, Shik Chi Edman Tsang   +9 more
wiley   +1 more source

Biotechnical Multiscale Engineering of Scaffolds for Stem Cell and Organoid Research

Small, EarlyView.
Biotechnical multiscale engineering consideration of geometric and structural parameters, which is called biotechnical multiscale engineering, has an influence on stem cell development and organogenesis comparable to that of molecular genetics and biochemical parameters.
Merle‐Johanna Küstner, Christian Marx, Peter beim Graben, Serafim Rodrigues, Jörg Hampl, Frank Weise, Michael Gebinoga, Leon Kaysan, Maren Klett, Dana Brauer, Gregor Schlingloff, Doris Heinrich, Insa Sigrid Schroeder, Andreas Schober   +13 more
wiley   +1 more source

MnBr2${\rm MnBr}_2$ on the Graphene on Ir(110) Substrate: Growth, Structure, and Super‐Moiré

Small, EarlyView.
The study realizes single‐layer MnBr2${\rm MnBr}_2$ via molecular beam epitaxy on graphene on Ir(110), unveiling a unique super‐moiré (“moiré of moirés”) formed by lattices of different symmetries. Remarkably, this super‐moiré is driven by a virtual interaction between non‐contacting layers.
Affan Safeer, Oktay Güleryüz, Nicolae Atodiresei, Wouter Jolie, Thomas Michely, Jeison Fischer   +5 more
wiley   +1 more source

Atomic‐Scale Insights Into Antisite‐Defect‐Induced Metallicity in Halide Perovskites

Small, EarlyView.
Using an aberration‐corrected scanning transmission electron microscope, we identify that the PbCs antisite defect in CsPbBr3 shortens the Pb─Pb bond by ∼20 pm, and induces local strain and polarization, leading to a semiconductor‐to‐metal transition.
Sanxia Yin, Zhou Li, Yaonan Xiong, Jiayi Wang, Changwei Wu, Yang Fu, Zhenzhen Wu, Shulin Chen   +7 more
wiley   +1 more source

Integral representation of the Feynman propagators of the Dirac fermions on the de Sitter expanding universe

European Physical Journal C: Particles and Fields, 2018
The propagators of the Dirac fermions on the expanding portion of the $$(1+3)$$ (1+3) -dimensional de Sitter spacetime are considered as mode sums in momentum representation with a fixed vacuum of Bunch–Davies type.
Ion I. Cotăescu
doaj   +1 more source

Thermal Transport Properties of W2TMB2 Solid Solutions (TM = Fe, Co, Ni)

Zeitschrift für anorganische und allgemeine Chemie, EarlyView.
Thermal transport properties of W2TMB2 (TM: Fe, Co, Ni) and their solid solutions, as well as electron backscatter diffraction measurements, show interesting particularities depending on the TM type and content. In this work, thermal transport properties of W2FexCo1‐xB2, W2FexNi1-xCoB2, and W2NixCo1‐xB2 (x: 0.0, 0.2, 0.4, 0.6, 0.8, 1.0) were ...
Daniel Haas, Wenling Ren, Enrico Bruder, Felix Reinauer, Kathrin Hofmann, Hongbin Zhang, Barbara Albert   +6 more
wiley   +1 more source

Financial Time Series Uncertainty: A Review of Probabilistic AI Applications

Journal of Economic Surveys, EarlyView.
ABSTRACT Probabilistic machine learning models offer a distinct advantage over traditional deterministic approaches by quantifying both epistemic uncertainty (stemming from limited data or model knowledge) and aleatoric uncertainty (due to inherent randomness in the data), along with full distributional forecasts.
Sivert Eggen, Tord Johan Espe, Kristoffer Grude, Morten Risstad, Rickard Sandberg   +4 more
wiley   +1 more source

Identifying regions in wide-angle scattering via graph-theoretical approaches

Journal of High Energy Physics
The method of regions, which provides a systematic approach for computing Feynman integrals involving multiple kinematic scales, proposes that a Feynman integral can be approximated and even reproduced by summing over integrals expanded in certain ...
Yao Ma
doaj   +1 more source

Considerations on some algebraic properties of Feynman integrals [PDF]

Surveys in Mathematics and its Applications, 2008
Some algebraic properties of integralsover configuration spaces are investigated in order to better understandquantization and the Connes-Kreimer algebraic approach to renormalization.
Lucian M. Ionescu
doaj