Tootfinder

Mela: "ich habe eine gute Nachricht, eine mittelschlechte und eine schlechte. Welche willst du zuerst hören."
Bernd: "Die Schlechte."
Mela: "Wir können unseren Badezimmer-Rolladen nie wieder schließen."
Bernd: "Warum?"
Mela: "Kommen wir zur Mittelschlechten: wir haben einen Untermieter, aber er wird keine Miete zahlen."
*Grillenzirpen*
Mela: "Nun die Gute. Ich weiß, wo das Eichhörnchen hinverschwunden ist.…

Angesichts der aktuellen politischen Lage gewinne ich immer mehr den Eindruck sie läßt sich nur mit einem gut trainierten Gemüt wie Bernd das Brot durchstehen.
Seid mehr wie Bernd!
Oh, und vielleicht könnten kleine Teams wie Briegel, Chili und Bernd wirklich was reißen.
Ach ja, und hört mehr Songs von @…:

The Emotion-Memory Link: Do Memorability Annotations Matter for Intelligent Systems?
Maria Tsfasman, Ramin Ghorbani, Catholijn M. Jonker, Bernd Dudzik
https://arxiv.org/abs/2507.14084

The Emotion-Memory Link: Do Memorability Annotations Matter for Intelligent Systems?
Humans have a selective memory, remembering relevant episodes and forgetting the less relevant information. Possessing awareness of event memorability for a user could help intelligent systems in more accurate user modelling, especially for such applications as meeting support systems, memory augmentation, and meeting summarisation. Emotion recognition has been widely studied, since emotions are thought to signal moments of high personal relevance to users. The emotional experience of situation…

Sizable superconducting gap and anisotropic chiral topological superconductivity in the Weyl semimetal PtBi$_2$
Xiaochun Huang, Lingxiao Zhao, Sebastian Schimmel, Julia Besproswanny, Patrick H\"artl, Christian Hess, Bernd B\"uchner, Matthias Bode
https://arxiv.org/abs/2507.13843

Sizable superconducting gap and anisotropic chiral topological superconductivity in the Weyl semimetal PtBi$_2$
Topological superconductors offer a fertile ground for realizing Majorana zero modes -- topologically protected, zero-energy quasiparticles that are resilient to local perturbations and hold great promise for fault-tolerant quantum computing. Recent studies have presented encouraging evidence for intrinsic topological superconductivity in the Weyl semimetal trigonal PtBi$_2$, hinting at a robust surface phase potentially stable beyond the McMillan limit. However, due to substantial spatial vari…

AIn't Nothing But a Survey? Using Large Language Models for Coding German Open-Ended Survey Responses on Survey Motivation
Leah von der Heyde, Anna-Carolina Haensch, Bernd Wei{\ss}, Jessika Daikeler
https://arxiv.org/abs/2506.14634

AIn't Nothing But a Survey? Using Large Language Models for Coding German Open-Ended Survey Responses on Survey Motivation
The recent development and wider accessibility of LLMs have spurred discussions about how they can be used in survey research, including classifying open-ended survey responses. Due to their linguistic capacities, it is possible that LLMs are an efficient alternative to time-consuming manual coding and the pre-training of supervised machine learning models. As most existing research on this topic has focused on English-language responses relating to non-complex topics or on single LLMs, it is u…

big beautiful bernd

"Wer hat denn 2018 zusammen mit #Trump dafür gesorgt, dass das Atomabkommen mit Iran beendet wurde? Der Premier in Jerusalem will keinen Ausgleich, sondern schwache Nachbarn, die er nach Belieben dominieren kann." schreibt Bernd Dörries in der #SZ.
uns weiter:
"Während die Welt auf Iran un…

Israel: Netanjahus Krieg gegen Iran und die Folgen
Libanon, Syrien, Gaza, Iran: Benjamin Netanjahu will keinen Ausgleich, sondern schwache Nachbarn, die er nach Belieben dominieren kann

#GoodNews #GuteNachrichten
Eva Schneider-Borgmann (89) und ihr Mann Bernd kümmerten sich liebevoll um einen kleinen Fuchs
#Senioren

In Freiburg-Herdern freundet sich ein altes Ehepaar mit einem kranken Fuchs an - und pflegt ihn gesund
Bei einer 89-Jährigen und ihrem Mann steht auf einmal ein kleiner, kranker Fuchs vor der Tür. Das Ehepaar päppelt ihn auf mit in Würstchen versteckter Medizin. Doch dann beendet "Foxi" seine Besuche.

SOT Enabled 3D Magnetic Field Sensor with Low Offset and High Sensitivity
Sebastian Zeilinger, Johannes G\"uttinger, Klemens Pr\"ugl, Michael Kirsch, Joshua M. Salazar-Mej\'ia, Sabri Koraltan, Philip Heinrich, Sophie Zeilinger, Bernd Aichner, Florian Bruckner, Hubert Br\"uckl, Armin Satz, Dieter Suess
https://…

SOT Enabled 3D Magnetic Field Sensor with Low Offset and High Sensitivity
In this work we demonstrate a spin-orbit torque (SOT) magnetic field sensor, designed as a Ta/CoFeB/MgO structure, with high sensitivity and capable of active offset compensation in all three spatial directions. This is described and verified in both experiment and simulation. The measurements of magnetic fields showed an offset of 36, 50, and 37$\mathrm{μT}$ for x-, y-, and z-fields. Furthermore, the sensitivities of these measurements had values of 590, 580, and 490$\mathrm{V\,A^{-1}\,T^{-1}…

Exact Poincar\'e Constants in three-dimensional Annuli
Bernd Rummler, Michael Ruzicka, Gudrun Th\"ater
https://arxiv.org/abs/2506.13891 https://…

Exact Poincaré Constants in three-dimensional Annuli
We study 3d-annuli. In our non-dimensional setting each annulus $Ω_{\cal A}$ is defined via two concentrical balls with radii ${\cal A}/2$ and ${\cal A}/2 +1$. For these geometries we provide the exact value for the Poincaré constants for scalar functions and calculate precise Poincaré constants for solenoidal vector fields (in both cases with vanishing Dirichlet traces on the boundary). For this we use the first eigenvalues of the scalar Laplacian and the Stokes operator, respectively. Addi…

Europe should counter new Trump tariffs 'immediately,' EU Parliament's Lange says (Rory O'Neill/Politico)
https://www.politico.eu/article/tariffs-trump-european-union-trade-steel-parliament-bernd-lange/
http://www.memeorandum.com/250531/p24#a250531p24

Mela bucht ein Stadtmobil. Zum ersten Mal einen Fiat 500e.
Bernd disst das Auto mehrfach auf der Hinfahrt. Beim Einräumen der Taschen in den Kofferraum:
Bernd: "Ist das Ladekabel da Starkstrom oder ein normales Schuko-Kabel?"
Bernd: "Für den reicht doch sicher ein USB-Ladeport."
#SzenenEinerEhe

Ist dieser Zug gerade ernsthaft ein paar Meter vorgefahren und dann wieder angehalten um die Bussineskasper Bernd und Manuel noch einzusammeln, damit sie sich lärmend im Ruheabteil niederlassen und auf ihrem Worktravel noch nen paar schöne assets committen können...?!?
Nein, natürlich nicht, ist nicht passiert. Aber Bernd und Manuel sind solche Typen, denen das gefallen würde (wenn ich das hier bei Twitter gepostet hätte, oder blusky oder so). Säcke!

An Early History of Toric Ideals
Serkan Ho\c{s}ten
https://arxiv.org/abs/2505.18443 https://arxiv.org/pdf/2505.18443

An Early History of Toric Ideals
Toric ideals are everywhere. They have been in the commutative algebra lexicon since about 1990 when Bernd Sturmfels used the term. The early days of toric ideals and their Gröbner bases were full of new results and promising developments in their applications. Bernd has been consistently their biggest promoter through his own work and that of his collaborators and students. This article is a personal and subjective recalling of the first decade of toric ideals when Bernd played a central role.

Habe ChatGPT gefragt, was der Bernd gerade so treibt: "Falls du magst, kann ich dir eine kleine satirische Sommerpostkarte von „Bernd im braunen Liegestuhl“ schreiben – oder ein kleines Gedicht?" #noafd

Donnerstag morgens gegen 6 Uhr.
Bernd und Mela liegen aufgrund der Hitze semiwach im Bett.
Neben dem Bett: *raschel* *CRUNCH*
Bernd und Mela schrecken hoch und sehen noch einen roten Puschelschwanz aus dem offenen Fenster verschwinden.
Bernd und Mela: "WeTehEff!!"
#SzenenEinerEhe

Unusual Valence of Ru and Prediction of Magnetism, Anomalous Hall Conductivity in a Newly Synthesized Double Perovskite Compound Ca_2CoRuO_6
Koushik Pradhan, Soumya Ghorai, Prabuddha Sanyal, Ryan Morrow, Bernd B\"uchner, Thirupathaiah Setti, Tanusri Saha Dasgupta
https://arxiv.org/abs/2506.09423

Unusual Valence of Ru and Prediction of Magnetism, Anomalous Hall Conductivity in a Newly Synthesized Double Perovskite Compound Ca_2CoRuO_6
With a goal to expand on the family of double perovskite compounds, hosting 3d transition metal and 4d or 5d transition metal, two new ordered double perovskite compounds, Ca$_2$FeRuO$_6$ and Ca$_2$CoRuO$_6$ are synthesized following the prediction of a recent high throughput machine-learning study [Phys. Rev. Materials 3, 084418]. Experimentally both compounds are found to stabilize in monoclinic symmetry, which is consistent with the high-throughput prediction for Ca$_2$FeRuO$_6$, but at odd …

Optimal designs for identifying effective doses in drug combination studies
Leonie Sch\"urmeyer, Ludger Sandig, Leonie Theresa Hezler, Bernd-Wolfgang Igl, Kirsten Schorning
https://arxiv.org/abs/2506.05913

Optimal designs for identifying effective doses in drug combination studies
We consider the optimal design problem for identifying effective dose combinations within drug combination studies where the effect of the combination of two drugs is investigated. Drug combination studies are becoming increasingly important as they investigate potential interaction effects rather than the individual impacts of the drugs. In this situation, identifying effective dose combinations that yield a prespecified effect is of special interest. If nonlinear surface models are used to de…

Fitting without fittings
Johanna Bimmermann, Bernd Stratmann, Kai Zehmisch
https://arxiv.org/abs/2506.07525 https://arxiv.org/pdf/250…

Fitting without fittings
We show that all symplectically aspherical fillings of the unit cotangent bundle of a given odd-dimensional sphere are diffeomorphic to the corresponding unit co-disc bundle. The concept of fittings previously introduced is not needed.

Compact magnetic field cycling system with the range from nT to 9.4 T exemplified with 13C relaxation dispersion and SABRE-SHEATH hyperpolarization
Josh P. Peters, Charbel D. Assaf, Jan-Bernd H\"ovener, Andrey N. Pravdivtsev
https://arxiv.org/abs/2506.08711

Compact magnetic field cycling system with the range from nT to 9.4 T exemplified with 13C relaxation dispersion and SABRE-SHEATH hyperpolarization
We present a compact magnetic field cycling system for high-resolution NMR spectrometers. The system enables the transfer of the sample from B0 field of 9.4 T to about nT and all fields in between within 1 second. Utilizing a flexible gear rod made the shuttling system more compact, reducing the height to about the height required for filling liquid helium - hence, it can be installed in average-size NMR laboratories (the height of NMR with MFC is only 3.32 m). The system utility is exemplified…

Weighted blow-up desingularization of plane curves
Dan Abramovich, Ming Hao Quek, Bernd Schober
https://arxiv.org/abs/2507.01232 https://

Weighted blow-up desingularization of plane curves
Given a singular hypersurface in a regular 2-dimensional scheme essentially of finite type over a field, we construct an embedded resolution of singularities by tame Artin stacks. This applies in particular to plane curves. The key tool is Hironaka's characteristic polyhedron from which we determine a suitable center for a stack-theoretic weighted blow-up. In particular, we show that the order strictly decreases at every point lying above the center. In contrast to earlier work by the authors, …

Bernd macht sich bereit, bei 36 °C zu Fuß zum Supermarkt zu laufen.
Bernd: "Wenn ich nicht wiederkomme … komm nicht hinterher."
#SzenenEinerEhe

A Tale of Two Shocks
Robert F. Wimmer-Schweingruber, Domenico Trotta, Rungployphan Kieokaew, Liu Yang, Alexander Kollhoff, Lars Berger, Patrick K\"uhl, Stephan I. B\"ottcher, Bernd Heber, Philippe Louarn, Andrey Fedorov, Javier Rodriguez-Pacheco, Ra\'ul G\'omez-Herrero, Francisco Espinosa Lara, Ignacio Cernuda, Yulia Kartavykh, Linghua Wang, George C. Ho, Robert C. Allen, Glenn M. Mason, Zheyi Ding, Andrea Larosa, G. Sindhuja, Sandra Eldrum, Sebastian Fleth, David Lar…

A Tale of Two Shocks
It was the best of times, it was the worst of times, . . . - for the thermal/suprathermal particle populations in the vicinity of two traveling interplanetary shocks observed by Solar Orbiter on 2023-11-29 07:51:17 UTC and 2023-11-30 10:47:26 UTC at $\sim 0.83$ astronomical units from the Sun. We investigate these two very dissimilar shocks and elucidate their non-equilibrium features. We do not provide explanations of all observed features, our aim is to report them here for future reference…

Upscaling the hyperpolarization sample volume of an automat-ed hydrogenative parahydrogen-induced polarizer
Yenal G\"okpek, Jan-Bernd H\"ovener, Andrey N. Pravdivtsev
https://arxiv.org/abs/2507.03790

Upscaling the hyperpolarization sample volume of an automat-ed hydrogenative parahydrogen-induced polarizer
Nuclear magnetic resonance (NMR) and magnetic resonance imaging (MRI) suffer from inherently low sensitivity due to the weak thermal polarization of nuclear spins. Parahydrogen-induced polarization (PHIP) offers a powerful route to enhance NMR signals by several orders of magnitude, enabling real-time metabolic imaging. However, PHIP implementations are often constrained by small sample volumes, limited automation, and complex high-pressure requirements. In this work, we present an upgraded, au…

A modified Levenberg-Marquardt method for estimating the elastic material parameters of polymer waveguides using residuals between autocorrelated frequency responses
Dominik Itner, Dmitrij Dreiling, Hauke Gravenkamp, Bernd Henning, Carolin Birk
https://arxiv.org/abs/2507.01706

A modified Levenberg-Marquardt method for estimating the elastic material parameters of polymer waveguides using residuals between autocorrelated frequency responses
In this contribution, we address the estimation of the frequency-dependent elastic parameters of polymers in the ultrasound range, which is formulated as an inverse problem. This inverse problem is implemented as a nonlinear regression-type optimization problem, in which the simulation signals are fitted to the measurement signals. These signals consist of displacement responses in waveguides, focusing on hollow cylindrical geometries to enhance the simulation efficiency. To accelerate the opti…

Characterization of the VKI Plasmatron subsonic ICP jet combining optical emission spectroscopy, intrusive measurements, and CFD simulations
Andrea Fagnani, Bernd Helber, Damien Le Quang, Alessandro Turchi, Jimmy Freitas Monteiro, Annick Hubin, Olivier Chazot
https://arxiv.org/abs/2506.02469…

Characterization of the VKI Plasmatron subsonic ICP jet combining optical emission spectroscopy, intrusive measurements, and CFD simulations
This paper addresses the characterization of the subsonic flow in the 1.2~MW Inductively Coupled Plasma (ICP) wind tunnel at the von Karman Institute for Fluid Dynamics (VKI), targeting chamber pressures of 50 and 100~mbar, and input electric powers between 150 and 300~kW. Ultraviolet to near-infrared optical emission spectroscopy measurements of the free-jet flow are carried out with an updated experimental set-up, calibration procedure, and data processing, providing high-quality absolute spa…

Bernd: "Linus Thorvalds Tochter ist im College und schrieb ihm, dass ihn dort alle kennen, weil er Git erfunden hat."
Mela: *Stöhnt* "Linus Thorvalds Tochter ist im College?"
Bernd: "Sind wir alt?"
Mela: "Ich erinnere mich noch an die Ankündigung ihrer Geburt."
#SzenenEinerEhe

An Early History of Toric Ideals
Serkan Ho\c{s}ten
https://arxiv.org/abs/2505.18443 https://arxiv.org/pdf/2505.18443

An Early History of Toric Ideals
Toric ideals are everywhere. They have been in the commutative algebra lexicon since about 1990 when Bernd Sturmfels used the term. The early days of toric ideals and their Gröbner bases were full of new results and promising developments in their applications. Bernd has been consistently their biggest promoter through his own work and that of his collaborators and students. This article is a personal and subjective recalling of the first decade of toric ideals when Bernd played a central role.

A Practical Guide to Interpretable Role-Based Clustering in Multi-Layer Financial Networks
Christian Franssen, Iman van Lelyveld, Bernd Heidergott
https://arxiv.org/abs/2507.00600

A Practical Guide to Interpretable Role-Based Clustering in Multi-Layer Financial Networks
Understanding the functional roles of financial institutions within interconnected markets is critical for effective supervision, systemic risk assessment, and resolution planning. We propose an interpretable role-based clustering approach for multi-layer financial networks, designed to identify the functional positions of institutions across different market segments. Our method follows a general clustering framework defined by proximity measures, cluster evaluation criteria, and algorithm sel…

..."Plötzlich taucht ein Pressevertreter auf. Alle erstarren – dann posieren sie schnell: Bernd mit Eichenlaubkranz, Erika mit Flammenwerfer gegen Gender-Toiletten, Gauland mit Schlauchboot – aber falsch herum." 😅 #noafd

Revisiting Active Learning under (Human) Label Variation
Cornelia Gruber, Helen Alber, Bernd Bischl, G\"oran Kauermann, Barbara Plank, Matthias A{\ss}enmacher
https://arxiv.org/abs/2507.02593

Revisiting Active Learning under (Human) Label Variation
Access to high-quality labeled data remains a limiting factor in applied supervised learning. While label variation (LV), i.e., differing labels for the same instance, is common, especially in natural language processing, annotation frameworks often still rest on the assumption of a single ground truth. This overlooks human label variation (HLV), the occurrence of plausible differences in annotations, as an informative signal. Similarly, active learning (AL), a popular approach to optimizing th…

From the dynamic to the static glass transition via hypersonic measurements using Brillouin spectroscopy
Jan-Kristian Kr\"uger, Rafael J. Jim\'enez Riob\'oo, Bernd Wetzel, Andreas Klingler
https://arxiv.org/abs/2506.20808

From the dynamic to the static glass transition via hypersonic measurements using Brillouin spectroscopy
For the fragile, low-molecular-weight liquid diglycidyl ether of bisphenol A (DGEBA), we report on the dynamic glass transition and a further acoustic anomaly in the vicinity of the thermal glass transition based on hypersonic investigations of the longitudinal elastic modulus using Brillouin spectroscopy. This additional acoustic anomaly of the longitudinally polarized phonon is confirmed by the occurrence of an anomaly of the shear phonon at the same thermal glass transition temperature. Anal…

Mela："Aber wegen Linux kennen Sie ihn nicht?"
Bernd: "Er schrieb, dass er Git in 4 Monaten programmiert, dann an andere Maintainer abgegeben und seit 20 Jahren nichts mehr damit zu tun hat."
#SzenenEinerEhe

Topological nodal $i$-wave superconductivity in PtBi$_2$
Susmita Changdar, Oleksandr Suvorov, Andrii Kuibarov, Setti Thirupathaiah, Grigoriy Shipunov, Saicharan Aswartham, Sabine Wurmehl, Iryna Kovalchuk, Klaus Koepernik, Carsten Timm, Bernd B\"uchner, Ion Cosma Fulga, Sergey Borisenko, Jeroen van den Brink
https://arxiv.or…

Topological nodal $i$-wave superconductivity in PtBi$_2$
Most superconducting materials are well-understood and conventional in the sense that the pairs of electrons that cause the superconductivity by their condensation have the highest possible symmetry. Famous exceptions are the enigmatic high-$T_c$ cuprate superconductors. Nodes in their superconducting gap are the fingerprint of their unconventional character and imply superconducting pairing of $d$-wave symmetry. Here, using angle-resolved photoemission spectroscopy, we observe that the Weyl se…

Squared Linear Models
Hannah Friedman, Bernd Sturmfels, Maximilian Wiesmann
https://arxiv.org/abs/2505.19351 https://arxiv.org/pdf/25…

Squared Linear Models
We study statistical models that are parametrized by squares of linear forms. All critical points of the likelihood function are real and positive. There is one for each region of the projective hyperplane arrangement. We study the ideal and singular locus of the model, and we give a determinantal presentation for its likelihood correspondence. We characterize tropical degenerations of the MLE, and we describe log-normal polytopes.

Squared Linear Models
Hannah Friedman, Bernd Sturmfels, Maximilian Wiesmann
https://arxiv.org/abs/2505.19351 https://arxiv.org/pdf/25…

Squared Linear Models
We study statistical models that are parametrized by squares of linear forms. All critical points of the likelihood function are real and positive. There is one for each region of the projective hyperplane arrangement. We study the ideal and singular locus of the model, and we give a determinantal presentation for its likelihood correspondence. We characterize tropical degenerations of the MLE, and we describe log-normal polytopes.