Tootfinder

Dark-Field X-Ray Microscopy with Structured Illumination for Three-Dimensional Imaging
Do\u{g}a G\"ursoy, Kaan Alp Yay, Elliot Kisiel, Michael Wojcik, Dina Sheyfer, Matthew Highland, Ian Randal Fisher, Stephan Hruszkewycz, Zahir Islam
https://arxiv.org/abs/2405.12799

Positive sectional curvature is not preserved under the Ricci flow in dimensions seven and thirteen
David Gonz\'alez-\'Alvaro, Masoumeh Zarei
https://arxiv.org/abs/2403.13764

Positive sectional curvature is not preserved under the Ricci flow in dimensions seven and thirteen
We prove that there exist $\mathsf{SU}_{3}$-invariant metrics on Aloff-Wallach spaces $W^7_{k_1, k_2}$, as well as $\mathsf{SU}_{5}$-invariant metrics on the Berger space $B^{13}$, which have positive sectional curvature and evolve under the Ricci flow to metrics with non-positively curved planes.

Mit neuer Frisur - Alaba und sein Sessel-Jubel sind zurück #News #Nachrichten

Talgangbahn rückt näher – Albstädter Räte stimmen für Vereinbarung mit SWEG-Tochter SSG
Der nächste Schritt hin zur Reaktivierung der Talgangbahn ist getan: Der Gemeinderat der Stadt Albstadt gibt grünes Licht für den Abschluss einer Planungs- und Realisierungsvereinbarung mit der SSG. Was das bedeutet und wann die endgültige Entscheidung über den Halbstundentakt, der den Räten immens wichtig ist, fallen muss.

Talgangbahn rückt näher – Albstädter Räte stimmen für Vereinbarung mit SWEG-Tochter SSG
Der nächste Schritt hin zur Reaktivierung der Talgangbahn ist getan: Der Gemeinderat der Stadt Albstadt gibt grünes Licht für den Abschluss einer Planungs- und Realisierungsvereinbarung mit der SSG. Was das bedeutet und wann die endgültige Entscheidung üb

This https://arxiv.org/abs/2311.12149 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Wave Generation by Flare-Accelerated Ions and Implications for 3He Acceleration
The waves generated by high-energy proton and alpha particles streaming from solar flares into regions of colder plasma are explored using particle-in-cell simulations. Initial distribution functions for the protons and alphas consist of two populations: an energetic, streaming population represented by an anisotropic ($T_{\parallel} > T_{\perp}$), one-sided kappa function and a cold, Maxwellian background population. The anisotropies and non-zero heat fluxes of these distributions destabilize …

Identifying and exploiting alpha in linear asset pricing models with strong, semi-strong, and latent factors
Ron P. Smith, M. Hashem Pesaran
https://arxiv.org/abs/2405.02217

Identifying and exploiting alpha in linear asset pricing models with strong, semi-strong, and latent factors
The risk premia of traded factors are the sum of factor means and a parameter vector we denote by ϕ which is identified from the cross section regression of alpha of individual securities on the vector of factor loadings. If phi is non-zero one can construct "phi-portfolios" which exploit the systematic components of non-zero alpha. We show that for known values of betas and when phi is non-zero there exist phi-portfolios that dominate mean-variance portfolios. The paper then proposes a two-st…

This https://arxiv.org/abs/2311.12149 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Wave Generation by Flare-Accelerated Ions and Implications for 3He Acceleration
The waves generated by high-energy proton and alpha particles streaming from solar flares into regions of colder plasma are explored using particle-in-cell simulations. Initial distribution functions for the protons and alphas consist of two populations: an energetic, streaming population represented by an anisotropic ($T_{\parallel} > T_{\perp}$), one-sided kappa function and a cold, Maxwellian background population. The anisotropies and non-zero heat fluxes of these distributions destabilize …

Electron-phonon coupling induced topological phase transition in an $\alpha$-$T_{3}$ Haldane-Holstein model
Mijanur Islam, Kuntal Bhattacharyya, Saurabh Basu
https://arxiv.org/abs/2404.08467

Electron-phonon coupling induced topological phase transition in an $α$-$T_{3}$ Haldane-Holstein model
We present impelling evidence of topological phase transitions induced by electron-phonon (e-ph) coupling in an $α$-$T_3$ Haldane-Holstein model that presents smooth tunability between graphene ($α=0$) and a dice lattice $(α=1)$. The e-ph coupling has been incorporated via the Lang-Firsov transformation which adequately captures the polaron physics in the high frequency (anti-adiabatic) regime, and yields an effective Hamiltonian of the system through zero phonon averaging at $T=0$. While ex…

Semi-leptonic $W$ decay to $B$ meson with lepton pairs in HQET factorization upto $\mathcal{O}(\alpha_s)$
Saadi Ishaq, Sajawal Zafar, Abdur Rehman, Ishtiaq Ahmed
https://arxiv.org/abs/2404.01696

Semi-leptonic $W$ decay to $B$ meson with lepton pairs in HQET factorization upto $\mathcal{O}(α_s)$
Motivated by the study of heavy-light meson production within the framework of heavy quark effective theory (HQET) factorization, we extend the factorization formalism for rather a complicated process $W^+\to B^+\ell^+\ell^-$ in the limit of non-zero invariant squared-mass of dilepton, $q^2$, at the lowest order in $1/m_b$ up to $\mathcal{O}(α_s)$. The purpose of the current study is to extend the HQET factorization formula for the $W^+\to B^+\ell^+\ell^-$ process and subsequently compute the …

Scaled global operators and Fueter variables on non-zero scaled hypercomplex numbers
Daniel Alpay, Ilwoo Cho, Mihaela Vajiac
https://arxiv.org/abs/2404.03065

Scaled global operators and Fueter variables on non-zero scaled hypercomplex numbers
In this paper we describe the rise of global operators in the scaled quaternionic case, an important extension from the quaternionic case to the family of scaled hypercomplex numbers $\mathbb{H}_t,\, t\in\mathbb{R}^*$, of which the $\mathbb{H}_{-1}=\mathbb{H}$ is the space of quaternions and $\mathbb{H}_{1}$ is the space of split quaternions. We also describe the scaled Fueter-type variables associated to these operators, developing a coherent theory in this field. We use these types of variabl…