cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Psychometric properties of the French Hot Flash Related Daily Interference Scale (HFRDIS)
Creators: name: Cavadias, I.
name: Rouzier, R.
name: Milder, M.
name: Bonneau, C.
name: Mullaert, J.
name: Hequet, D.
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Hot flashes are one of the major symptoms of climacteric syndrome. Despite the high prevalence of these symptoms, few questionnaires assessing the impact of hot flashes on quality of life have been validated. The aim of this study was to validate a French version of the Hot Flash Related Daily Interference Scale (HFRDIS) in a sample of French women. In this prospective study, data were obtained from two groups of women aged between 40 and 60 years from both women without breast cancer and women under hormone therapy for breast cancer between March 2021 and February 2022. Translation was made by an official English–French translator using the forward–backward method. One hundred and sixty-seven women completed the HFRDIS questionnaire. The scree plots confirmed unidimensional structure. Cronbach’s α coefficient was 0.92 [0.90–0.94] similar to the original version. The intra-class correlation coefficients of each item ranged between 0.58 and 0.71 Concordance of the scores of each item with those obtained during the validation of the original version of the HFRDIS was confirmed. The validation results show that the French version of the HFRDIS questionnaire is a valid tool to evaluate the impact of hot flashes on the daily life activities of patients.
BPS/CFT Correspondence III: Gauge Origami partition function and qq-characters
Creators: name: Nekrasov, Nikita
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Algebraic Geometry (math.AG)
subject: Combinatorics (math.CO)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We study generalized gauge theories engineered by taking the low energy limit of the $Dp$ branes wrapping $X \times T^{p-3}$, with $X$ a possibly singular surface in a Calabi-Yau fourfold $Z$. For toric $Z$ and $X$ the partition function can be computed by localization, making it a statistical mechanical model, called the gauge origami. The random variables are the ensembles of Young diagrams. The building block of the gauge origami is associated with a tetrahedron, whose edges are colored by vector spaces. We show the properly normalized partition function is an entire function of the Coulomb moduli, for generic values of the $Ω$-background parameters. The orbifold version of the theory defines the $qq$-character operators, with and without the surface defects. The analytic properties are the consequence of a relative compactness of the moduli spaces $M({\vec n}, k)$ of crossed and spiked instantons, demonstrated in arXiv:1608.07272.
description: v2. 26 pages, paper 3 in the series of 5, minor typos; v3. 33 pages, notations streamlined, presentation (hopefully) improved, refs added
Gravitational lensing by scalar-tensor wormholes and the energy conditions
Creators: name: Shaikh, Rajibul
name: Kar, Sayan
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study gravitational lensing by a class of zero Ricci scalar wormholes which arise as solutions in a scalar-tensor theory of gravity. An attempt is made to find a possible link between lensing features, stable/unstable photon orbits and the energy conditions on the matter required to support these spacetimes. Our analysis shows (for this class of wormholes) that light rays always exhibit a positive deflection if the energy conditions are satisfied (nonexotic matter content). In contrast, if the energy conditions are violated (exotic matter), the net deflection of a light ray may be positive, negative or even zero, depending on values of the metric and impact parameters. This prompts us to introduce a surface defined by a turning point value at which the net deflection of a light ray is equal to zero, even though we have a curved spacetime geometry. We argue that the existence of such a surface may be linked to exotic/energy condition violating matter. Wormholes in modified gravity with matter satisfying the energy conditions do not seem to have such a zero deflection surface. Finally, we study strong gravitational lensing briefly and also look into the formation of Einstein and relativistic Einstein rings. We conclude with some estimates on the wormhole mass, throat-radius and the detectability of the Einstein rings.
description: 29 pages, 11 figures, revised version with a new section, published in PRD
Fellows am Marsilius-Kolleg
Creators: name: Marsilius-Kolleg
Publisher: name: Forum Marsilius-Kolleg
Year: 2022

description: Fellow-Klasse am Marsilius-Kolleg vom 1. Oktober 2021 bis 30. September 2022.
description: Forum Marsilius-Kolleg, Bd. 22 Nr. 2 (2022): Jahresbericht 2021/22
Electromagnetically induced transparency in circuit QED with nested polariton states
Creators: name: Long, Junling
name: Ku, H. S.
name: Wu, Xian
name: Gu, Xiu
name: Lake, Russell E.
name: Bal, Mustafa
name: Liu, Yu-xi
name: Pappas, David P.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Electromagnetically induced transparency (EIT) is a signature of quantum interference in an atomic three-level system. By driving the dressed cavity-qubit states of a two-dimensional circuit QED system, we generate a set of polariton states in the nesting regime. The lowest three energy levels are utilized to form the $Λ$-type system. EIT is observed and verified by Akaike's information criterion based testing. Negative group velocities up to $-0.52\pm0.09$ km/s are obtained based on the dispersion relation in the EIT transmission spectrum.
description: 5 pages, 5 figures
Young Fellows am Marsilius-Kolleg
Creators: name: Marsilius-Kolleg
Publisher: name: Forum Marsilius-Kolleg
Year: 2022

description: Klasse der Young Marsilius Fellows vom 1. Oktober 2021 bis 30. September 2022.
description: Forum Marsilius-Kolleg, Bd. 22 Nr. 2 (2022): Jahresbericht 2021/22
Herausforderungen der Hochauflösenden Modellierung von Hitzestress und potentieller adaptionsmassnahmen in Afrika
Creators: name: Zipf, Alexander
Publisher: name: Forum Marsilius-Kolleg
Year: 2022

description: Prof. Dr. Alexander Zipf (Geoinformatik) informiert über Verlauf und Ergebnisse seiner Fellowship innerhalb der Zeitspanne vom 1. Oktober 2021 bis 30. September 2022. An dem interdisziplinären Fellow-Projekt „Klimawandel & Gesundheit: Verbesserung der Gesundheitsvorsorge vulnerabler Bevölkerung in Afrika durch räumlich hochaufgelöstes Monitoring der natürlichen und anthropogenen Umwelt“ war außerdem Prof. Dr. Dr. Till Bärnighausen beteiligt (Bericht in diesem Band).
description: Forum Marsilius-Kolleg, Bd. 22 Nr. 2 (2022): Jahresbericht 2021/22
The Conformal BMS Group
Creators: name: Haco, Sasha J.
name: Hawking, Stephen W.
name: Perry, Malcolm J.
name: Bourjaily, Jacob L.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We describe the conformal symmetries of asymptotically flat spacetime. These represent an extension of the BMS group that we call the conformal BMS group. Its general features are discussed.
description: 16 pages
Unified field theory of basic forces and elementary particles with gravitational origin of gauge symmetry in hyper-spacetime
Creators: name: Wu, Yue-Liang
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A unified field theory of all known basic forces and elementary particles is built based on the postulates of gauge invariance and coordinate independence along with general conformal scaling symmetry. The hyper-spin charge of a unified hyper-spinor field is conjectured to correlate with the dimension of hyper-spacetime. The minimal dimension of hyper-spacetime for the unity of quarks and leptons in the standard model is found to be $D_h=19$ with a bimaximal symmetry. A unified fundamental interaction is governed by hyper-spin gauge symmetry SP(1,$D_h$-1). We show gravitational origin of gauge symmetry characterized by gauge-type Goldstone-like hyper-gravifield, which enables us to study gauge gravity and gravity geometry correspondences and to reveal gauge geometry duality.
description: published version with an extended conclusion and remark
Mensch und Automat – Die Wahrnehmung und Bewertung künstlicher Intelligenz
Creators: name: Voß, Andreas
Publisher: name: Forum Marsilius-Kolleg
Year: 2022

description: Andreas Voß (Psychologie) informiert über Verlauf und Ergebnisse seiner Fellowship innerhalb der Zeitspanne vom 1. Oktober 2021 bis 30. September 2022. An dem interdisziplinären Fellow-Projekt „Mensch und Automat: Die Rolle von Zufall und Determinismus“ waren außerdem Prof. Dr. Rebecca Müller und Prof. Dr. Ullrich Köthe beteiligt (Berichte in diesem Band).
description: Forum Marsilius-Kolleg, Bd. 22 Nr. 2 (2022): Jahresbericht 2021/22
Tinkertoys for the E7 Theory
Creators: name: Chacaltana, Oscar
name: Distler, Jacques
name: Trimm, Anderson
name: Zhu, Yinan
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We classify the class $S$ theories of type $E_7$. These are four-dimensional $\mathcal{N}=2$ superconformal field theories arising from the compactification of the $E_7$ $(2,0)$ theory on a punctured Riemann surface, $C$. The classification is given by listing all 3-punctured spheres ("fixtures"), and connecting cylinders, which can arise in a pants-decomposition of $C$. We find exactly 11,000 fixtures with three regular punctures, and an additional 48 with one "irregular puncture" (in the sense used in our previous works). To organize this large number of theories, we have created a web application at https://golem.ph.utexas.edu/class-S/E7/ . Among these theories, we find 10 new ones with a simple exceptional global symmetry group, as well as a new rank-2 SCFT and several new rank-3 SCFTs. As an application, we study the strong-coupling limit of the $E_7$ gauge theory with 3 hypermultiplets in the $56$. Using our results, we also verify recent conjectures that the $T^2$ compactification of certain $6d$ $(1,0)$ theories can alternatively be realized in class $S$ as fixtures in the $E_7$ or $E_8$ theories.
description: Fixed one entry in table of interacting fixtures with an irregular puncture
Auf der Suche nach einer Theorie des Fiebers
Creators: name: Schwarz, Ulrich
Publisher: name: Forum Marsilius-Kolleg
Year: 2022

description: Ulrich Schwarz (Theoretische Biophysik) informiert über Verlauf und Ergebnisse seiner Fellowship innerhalb der Zeitspanne vom 1. Oktober 2021 bis 30. September 2022. An dem interdisziplinären Fellow-Projekt „System Fieber: Zur Wirkung von Malaria, Covid-19 und anderen Fieberkrankheiten“ waren außerdem Prof. Dr. Stefanie Gänger und Prof. Dr. Friedrich Frischknecht beteiligt (Berichte in diesem Band).
description: Forum Marsilius-Kolleg, Bd. 22 Nr. 2 (2022): Jahresbericht 2021/22
Robuste Strukturen in der Ökonomie – Die Rolle von Komplexität und Diversität
Creators: name: Trautmann, Stefan
Publisher: name: Forum Marsilius-Kolleg
Year: 2022

description: Stefan Trautmann (Verhaltensökonomik) informiert über Verlauf und Ergebnisse seiner Fellowship innerhalb der Zeitspanne vom 1. Oktober 2021 bis 30. September 2022. An dem interdisziplinären Fellow-Projekt „Building robust communities: Embracing complexity and diversity?“ waren außerdem Prof. Dr. Alexis Maizel und Prof. Dr. Christiane Brosius beteiligt (Berichte in diesem Band).
description: Forum Marsilius-Kolleg, Bd. 22 Nr. 2 (2022): Jahresbericht 2021/22
An efficient mass-preserving interface-correction level set/ghost fluid method for droplet suspensions under depletion forces
Creators: name: Ge, Zhouyang
name: Loiseau, Jean-Christophe
name: Tammisola, Outi
name: Brandt, Luca
Publisher: name: arXiv
Year: 2017
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Aiming for the simulation of colloidal droplets in microfluidic devices, we present here a numerical method for two-fluid systems subject to surface tension and depletion forces among the suspended droplets. The algorithm is based on an efficient solver for the incompressible two-phase Navier-Stokes equations, and uses a mass-conserving level set method to capture the fluid interface. The four novel ingredients proposed here are, firstly, an interface-correction level set (ICLS) method; global mass conservation is achieved by performing an additional advection near the interface, with a correction velocity obtained by locally solving an algebraic equation, which is easy to implement in both 2D and 3D. Secondly, we report a second-order accurate geometric estimation of the curvature at the interface and, thirdly, the combination of the ghost fluid method with the fast pressure-correction approach enabling an accurate and fast computation even for large density contrasts. Finally, we derive a hydrodynamic model for the interaction forces induced by depletion of surfactant micelles and combine it with a multiple level set approach to study short-range interactions among droplets in the presence of attracting forces.
Künstliche Intelligenz: Zwischen Wunderglaube und Wissenschaft – "Der digitale Richter"
Creators: name: Schuhr, Jan
Publisher: name: Forum Marsilius-Kolleg
Year: 2022

description: Jan Schuhr (Strafrecht / Rechtsphilosophie) informiert über Verlauf und Ergebnisse seiner Fellowship innerhalb der Zeitspanne vom 1. Oktober 2021 bis 30. September 2022. An dem interdisziplinären Fellow-Projekt „Künstliche Intelligenz: Zwischen Wunderglaube und Wissenschaft“ waren außerdem Prof. Dr. Robert Scheichl und Prof. Dr. Andreas Dreuw beteiligt (Berichte in diesem Band).
description: Forum Marsilius-Kolleg, Bd. 22 Nr. 2 (2022): Jahresbericht 2021/22
Quantifying entanglement in two-mode Gaussian states
Creators: name: Tserkis, Spyros
name: Ralph, Timothy C.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Entangled two-mode Gaussian states are a key resource for quantum information technologies such as teleportation, quantum cryptography and quantum computation, so quantification of Gaussian entanglement is an important problem. Entanglement of formation is unanimously considered a proper measure of quantum correlations, but for arbitrary two-mode Gaussian states no analytical form is currently known. In contrast, logarithmic negativity is a measure straightforward to calculate and so has been adopted by most researchers, even though it is a less faithful quantifier. In this work, we derive an analytical lower bound for entanglement of formation of generic two-mode Gaussian states, which becomes tight for symmetric states and for states with balanced correlations. We define simple expressions for entanglement of formation in physically relevant situations and use these to illustrate the problematic behavior of logarithmic negativity, which can lead to spurious conclusions.
description: 8 pages,3 figs; The original submission gave an analytical formula that was claimed to give the entanglement of formation for arbitrary two-mode Gaussian states - this was incorrect. The formula gives a lower bound of EoF which saturates for symmetric states and for states with balanced correlations, and is a good approximation for most other states. This error is corrected in the revised version
Künstliche Intelligenz: Zwischen Wunderglaube und Wissenschaft – "Der digitale Mathematiker"
Creators: name: Scheichl, Robert
Publisher: name: Forum Marsilius-Kolleg
Year: 2022

description: Robert Scheichl (Mathematik / Wissenschaftliches Rechnen) informiert über Verlauf und Ergebnisse seiner Fellowship innerhalb der Zeitspanne vom 1. Oktober 2021 bis 30. September 2022. An dem interdisziplinären Fellow-Projekt „Künstliche Intelligenz: Zwischen Wunderglaube und Wissenschaft“ waren außerdem Prof. Dr. Andreas Dreuw und Prof. Dr. Jan Schuhr beteiligt (Berichte in diesem Band).
description: Forum Marsilius-Kolleg, Bd. 22 Nr. 2 (2022): Jahresbericht 2021/22
Getting Super-Excited with Modified Dispersion Relations
Creators: name: Ashoorioon, Amjad
name: Casadio, Roberto
name: Geshnizjani, Ghazal
name: Kim, Hyung J.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We demonstrate that in some regions of parameter space, modified dispersion relations can lead to highly populated excited states, which we dub as "super-excited" states. In order to prepare such super-excited states, we invoke dispersion relations that have negative slope in an interim sub-horizon phase at high momenta. This behaviour of quantum fluctuations can lead to large corrections relative to the Bunch-Davies power spectrum, which mimics highly excited initial conditions. We identify the Bogolyubov coefficients that can yield these power spectra. In the course of this computation, we also point out the shortcomings of the gluing method for evaluating the power spectrum and the Bogolyubov coefficients. As we discuss, there are other regions of parameter space, where the power spectrum does not get modified. Therefore, modified dispersion relations can also lead to so-called "calm excited states" as well. We conclude by commenting on the possibility of obtaining these modified dispersion relations within the Effective Field Theory of Inflation.
description: 1+19 pages, 4 figures
Mensch und Automat – Imaginationen in der mittelalterlichen Kunst
Creators: name: Müller, Rebecca
Publisher: name: Forum Marsilius-Kolleg
Year: 2022

description: Rebecca Müller (Kunstgeschichte des Mittelalters) informiert über Verlauf und Ergebnisse ihrer Fellowship innerhalb der Zeitspanne vom 1. Oktober 2021 bis 30. September 2022. An dem interdisziplinären Fellow-Projekt „Mensch und Automat: Die Rolle von Zufall und Determinismus“ waren außerdem Prof. Dr. Ullrich Köthe und Prof. Dr. Andreas Voß beteiligt (Berichte in diesem Band).
description: Forum Marsilius-Kolleg, Bd. 22 Nr. 2 (2022): Jahresbericht 2021/22
Analytical expressions for thermophysical properties of solid and liquid tungsten relevant for fusion applications
Creators: name: Tolias, P.
name: Team, the EUROfusion MST1
Publisher: name: arXiv
Year: 2017
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The status of the literature is reviewed for several thermophysical properties of pure solid and liquid tungsten which constitute input for the modelling of intense plasma-surface interaction phenomena that are important for fusion applications. Reliable experimental data are analyzed for the latent heat of fusion, the electrical resistivity, the specific isobaric heat capacity, the thermal conductivity and the mass density from the room temperature up to the boiling point of tungsten as well as for the surface tension and the dynamic viscosity across the liquid state. Analytical expressions of high accuracy are recommended for these thermophysical properties that involved a minimum degree of extrapolations. In particular, extrapolations were only required for the surface tension and viscosity.
Komplexität und Diversität – Robustheit in biologischen Systemen
Creators: name: Maizel, Alexis
Publisher: name: Forum Marsilius-Kolleg
Year: 2022

description: Prof. Dr. Alexis Maizel (Molekulare Pflanzenbiologie) informiert über Verlauf und Ergebnisse seiner Fellowship innerhalb der Zeitspanne vom 1. Oktober 2021 bis 30. September 2022. An dem interdisziplinären Fellow-Projekt „Building robust communities: Embracing complexity and diversity?“ waren außerdem Prof. Dr. Christiane Brosius und Prof. Dr. Stefan Trautmann beteiligt (Berichte in diesem Band).
description: Forum Marsilius-Kolleg, Bd. 22 Nr. 2 (2022): Jahresbericht 2021/22
Scientific Paradigms and Status Hierarchies
Creators: name: Baier, Silvan Daniel
Publisher: name: University of Chicago
Year: 2023
Subjects: subject: natural language processing
subject: network analysis
subject: scientific fields
subject: sociology of science
subject: status hierarchies

description: The processes by which scientific knowledge is created, disseminated, evaluated, and organized are permeated by inequalities across social, institutional, and geographic scales. This results in science being a highly stratified, constantly evolving, layered, and global multiscale network. However, not all scientific fields are created equal. While inequalities in science have been widely studied, differences in the conceptual organization of scientific fields have been overlooked. I explore the link between the paradigmatic cohesion of fields and the hierarchical ordering of participating organizations and individuals via citations, as well as through faculty hiring flows. For 11 fields in the social and natural sciences, from 1990 to 2012, and across a plethora of levels and measures, I find robust support for the positive association between scientific paradigms and status hierarchies. Put differently, high paradigm fields exhibit more status inequality in attention, reward and influence than low paradigm fields.
Orthogonal Tree Decompositions of Graphs
Creators: name: Dujmović, Vida
name: Joret, Gwenaël
name: Morin, Pat
name: Norin, Sergey
name: Wood, David R.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: This paper studies graphs that have two tree decompositions with the property that every bag from the first decomposition has a bounded-size intersection with every bag from the second decomposition. We show that every graph in each of the following classes has a tree decomposition and a linear-sized path decomposition with bounded intersections: (1) every proper minor-closed class, (2) string graphs with a linear number of crossings in a fixed surface, (3) graphs with linear crossing number in a fixed surface. Here `linear size' means that the total size of the bags in the path decomposition is $O(n)$ for $n$-vertex graphs. We then show that every $n$-vertex graph that has a tree decomposition and a linear-sized path decomposition with bounded intersections has $O(\sqrt{n})$ treewidth. As a corollary, we conclude a new lower bound on the crossing number of a graph in terms of its treewidth. Finally, we consider graph classes that have two path decompositions with bounded intersections. Trees and outerplanar graphs have this property. But for the next most simple class, series parallel graphs, we show that no such result holds.
Current in nanojunctions : Effects of reservoir coupling
Creators: name: Yadalam, Hari Kumar
name: Harbola, Upendra
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the effect of system reservoir coupling on currents flowing through quantum junctions. We consider two simple double-quantum dot configurations coupled to two external fermionic reservoirs and study the net current flowing between the two reservoirs. The net current is partitioned into currents carried by the eigenstates of the system and by the coherences between the eigenstates induced due to coupling with the reservoirs. We find that current carried by populations is always positive whereas current carried by coherences are negative for large couplings. This results in a non-monotonic dependence of the net current on the coupling strength. We find that in certain cases, the net current can vanish at large couplings due to cancellation between currents carried by the eigenstates and by the coherences. These results provide new insights into the non-trivial role of system-reservoir couplings on electron transport through quantum dot junctions. In the presence of weak coulomb interactions, net current as a function of system reservoir coupling strength shows similar trends as for the non-interacting case.
description: 9 pages, 12 figures
Mensch und Automat – Die Rolle von Zufall und Determinismus
Creators: name: Köthe, Ullrich
Publisher: name: Forum Marsilius-Kolleg
Year: 2022

description: Prof. Dr. Ullrich Köthe (Maschinelles Lernen) informiert über Verlauf und Ergebnisse seiner Fellowship innerhalb der Zeitspanne vom 1. Oktober 2021 bis 30. September 2022. An dem interdisziplinären Fellow-Projekt „Mensch und Automat: Die Rolle von Zufall und Determinismus“ waren außerdem Prof. Dr. Rebecca Müller und Prof. Dr. Andreas Voß beteiligt (Berichte in diesem Band).
description: Forum Marsilius-Kolleg, Bd. 22 Nr. 2 (2022): Jahresbericht 2021/22
Efficient Large Scale Clustering based on Data Partitioning
Creators: name: Bendechache, Malika
name: Le-Khac, Nhien-An
name: Kechadi, M-Tahar
Publisher: name: arXiv
Year: 2017
Subjects: subject: Databases (cs.DB)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Clustering techniques are very attractive for extracting and identifying patterns in datasets. However, their application to very large spatial datasets presents numerous challenges such as high-dimensionality data, heterogeneity, and high complexity of some algorithms. For instance, some algorithms may have linear complexity but they require the domain knowledge in order to determine their input parameters. Distributed clustering techniques constitute a very good alternative to the big data challenges (e.g.,Volume, Variety, Veracity, and Velocity). Usually these techniques consist of two phases. The first phase generates local models or patterns and the second one tends to aggregate the local results to obtain global models. While the first phase can be executed in parallel on each site and, therefore, efficient, the aggregation phase is complex, time consuming and may produce incorrect and ambiguous global clusters and therefore incorrect models. In this paper we propose a new distributed clustering approach to deal efficiently with both phases, generation of local results and generation of global models by aggregation. For the first phase, our approach is capable of analysing the datasets located in each site using different clustering techniques. The aggregation phase is designed in such a way that the final clusters are compact and accurate while the overall process is efficient in time and memory allocation. For the evaluation, we use two well-known clustering algorithms, K-Means and DBSCAN. One of the key outputs of this distributed clustering technique is that the number of global clusters is dynamic, no need to be fixed in advance. Experimental results show that the approach is scalable and produces high quality results.
description: 10 pages
Simulations of core-collapse supernovae in spatial axisymmetry with full Boltzmann neutrino transport
Creators: name: Nagakura, Hiroki
name: Iwakami, Wakana
name: Furusawa, Shun
name: Okawa, Hirotada
name: Harada, Akira
name: Sumiyoshi, Kohsuke
name: Yamada, Shoichi
name: Matsufuru, Hideo
name: Imakura, Akira
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present the first results of our spatially axisymmetric core-collapse supernova simulations with full Boltzmann neutrino transport, which amount to a time-dependent 5-dimensional (2 in space and 3 in momentum space) problem in fact. Special relativistic effects are fully taken into account with a two-energy-grid technique. We performed two simulations for a progenitor of 11.2M, employing different nuclear equations-of-state (EOS's): Lattimer and Swesty's EOS with the incompressibility of K = 220MeV (LS EOS) and Furusawa's EOS based on the relativistic mean field theory with the TM1 parameter set (FS EOS). In the LS EOS the shock wave reaches ~700km at 300ms after bounce and is still expanding whereas in the FS EOS it stalled at ~200km and has started to recede by the same time. This seems to be due to more vigorous turbulent motions in the former during the entire post-bounce phase, which leads to higher neutrino-heating efficiency in the neutrino-driven convection. We also look into the neutrino distributions in momentum space, which is the advantage of the Boltzmann transport over other approximate methods. We find non-axisymmetric angular distributions with respect to the local radial direction, which also generate off-diagonal components of the Eddington tensor. We find that the r θ-component reaches ~10% of the dominant rr-component and, more importantly, it dictates the evolution of lateral neutrino fluxes, dominating over the θθ-component, in the semi-transparent region. These data will be useful to further test and possibly improve the prescriptions used in the approximate methods.
description: Accepted for publication in ApJ
One-loop tests of supersymmetric gauge theories on spheres
Creators: name: Minahan, Joseph A.
name: Naseer, Usman
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show that a recently conjectured form for perturbative supersymmetric partition functions on spheres of general dimension $d$ is consistent with the flat space limit of 6-dimensional $\mathcal{N}=1$ super Yang-Mills. We also show that the partition functions for $\mathcal{N}=1$ 8- and 9-dimensional theories are consistent with their known flat space limits.
description: 14 pages. Minor modifications. References added
Polymer filaments from carbon quantum dots for 3D printing of antimicrobial medical devices
Creators: name: Zdenko Spitalsky (PISAS)
name: Frantisek Pokrivcak
name: Spitalska, Eva
name: Kovacova, Maria
Publisher: name: Zenodo
Year: 2023

description: 3rd workshop on biomarkers of infectious, oncological, and neurodegenerative diseases. - Bratislava : Institute of Virology, Biomedical Research Centre Slovak Academy of Sciences, 2023, s. 17. ISBN 978-80-972111-6-5.
Fieber und die Welt der Sattelzeit
Creators: name: Gänger, Stefanie
Publisher: name: Forum Marsilius-Kolleg
Year: 2022

description: Prof. Dr. Stefanie Gänger (Neuere Geschichte) informiert über Verlauf und Ergebnisse ihrer Fellowship innerhalb der Zeitspanne vom 1. Oktober 2021 bis 30. September 2022. An dem interdisziplinären Fellow-Projekt „System Fieber: Zur Wirkung von Malaria, Covid-19 und anderen Fieberkrankheiten“ waren außerdem Prof. Dr. Friedrich Frischknecht und Prof. Dr. Ulrich Schwarz beteiligt (Berichte in diesem Band).
description: Forum Marsilius-Kolleg, Bd. 22 Nr. 2 (2022): Jahresbericht 2021/22
Quantum capacitance of double-layer graphene
Creators: name: Parhizgar, Fariborz
name: Qaiumzadeh, Alireza
name: Asgari, Reza
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the ground-state properties of a double layer graphene system with the Coulomb interlayer electron-electron interaction modeled within the random phase approximation. We first obtain an expression of the quantum capacitance of a two layer system. In addition, we calculate the many-body exchange-correlation energy and quantum capacitance of the hybrid double layer graphene system at zero-temperature. We show an enhancement of the majority density layer thermodynamic density-of-states owing to an increasing interlayer interaction between two layers near the Dirac point. The quantum capacitance near the neutrality point behaves like square root of the total density, $α\sqrt{n}$, where the coefficient $α$ decreases by increasing the charge density imbalance between two layers. Furthermore, we show that the quantum capacitance changes linearly by the gate voltage. Our results can be verified by current experiments.
description: 7 pages, 5 figures
Fieber – Heiße Diskussionen um ein oft missverstandenes Krankheitssymptom
Creators: name: Frischknecht, Friedrich
Publisher: name: Forum Marsilius-Kolleg
Year: 2022

description: Prof. Dr. Friedrich Frischknecht (Infektiologie) informiert über Verlauf und Ergebnisse seiner Fellowship innerhalb der Zeitspanne vom 1. Oktober 2021 bis 30. September 2022. An dem interdisziplinären Fellow-Projekt „System Fieber: Zur Wirkung von Malaria, Covid-19 und anderen Fieberkrankheiten“ waren außerdem Prof. Dr. Stefanie Gänger und Prof. Dr. Ulrich Schwarz beteiligt (Berichte in diesem Band).
description: Forum Marsilius-Kolleg, Bd. 22 Nr. 2 (2022): Jahresbericht 2021/22
A sublinear version of Schur's lemma and elliptic PDE
Creators: name: Quinn, Stephen
name: Verbitsky, Igor E.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Analysis of PDEs (math.AP)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 35J61, 42B37 (Primary), 31B15 (Secondary)

description: We study the weighted norm inequality of $(1,q)$-type, \[ \Vert \mathbf{G}ν\Vert_{L^q(Ω, dσ)} \le C \Vert ν\Vert, \quad \text{ for all } ν\in \mathcal{M}^+(Ω), \] along with its weak-type analogue, for $0 < q < 1$, where $\mathbf{G}$ is an integral operator associated with the nonnegative kernel $G(x,y)$. Here $\mathcal{M}^+(Ω)$ denotes the class of positive Radon measures in $Ω$; $σ, ν\in \mathcal{M}^+(Ω)$, and $||ν||=ν(Ω)$. For both weak-type and strong-type inequalities, we provide conditions which characterize the measures $σ$ for which such an embedding holds. The strong-type $(1,q)$-inequality for $0
description: 29 pages
Künstliche Intelligenz: zwischen Wunderglaube und Wissenschaft – "Der digitale Chemiker"
Creators: name: Dreuw, Andreas
Publisher: name: Forum Marsilius-Kolleg
Year: 2022

description: Prof. Dr. Andreas Dreuw (Theoretische Chemie) informiert über Verlauf und Ergebnisse ihrer Fellowship innerhalb der Zeitspanne vom 1. Oktober 2021 bis 30. September 2022. An dem interdisziplinären Fellow-Projekt „Künstliche Intelligenz: Zwischen Wunderglaube und Wissenschaft“ waren außerdem Prof. Dr. Robert Scheichl und Prof. Dr. Jan Schuhr beteiligt (Berichte in diesem Band).
description: Forum Marsilius-Kolleg, Bd. 22 Nr. 2 (2022): Jahresbericht 2021/22
Robuste Gemeinschaften und Vielfalt Entschlüsseln – Ein Blick auf die Stadt als Modell
Creators: name: Brosius, Christiane
Publisher: name: Forum Marsilius-Kolleg
Year: 2022

description: Prof. Dr. Christiane Brosius (Ethnologie / Media Anthropology) informiert über Verlauf und Ergebnisse ihrer Fellowship innerhalb der Zeitspanne vom 1. Oktober 2021 bis 30. September 2022. An dem interdisziplinären Fellow-Projekt „Building robust communities: Embracing complexity and diversity?“ waren außerdem Prof. Dr. Alexis Maizel und Prof. Dr. Stefan Trautmann beteiligt (Berichte in diesem Band).
description: Forum Marsilius-Kolleg, Bd. 22 Nr. 2 (2022): Jahresbericht 2021/22
Observation of topological Bloch-state defects and their merging transition
Creators: name: Tarnowski, Matthias
name: Nuske, Marlon
name: Fläschner, Nick
name: Rem, Benno
name: Vogel, Dominik
name: Freystatzky, Lukas
name: Sengstock, Klaus
name: Mathey, Ludwig
name: Weitenberg, Christof
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Topological defects in Bloch bands, such as Dirac points in graphene, and their resulting Berry phases play an important role for the electronic dynamics in solid state crystals. Such defects can arise in systems with a two-atomic basis due to the momentum-dependent coupling of the two sublattice states, which gives rise to a pseudo-spin texture. The topological defects appear as vortices in the azimuthal phase of this pseudo-spin texture. Here, we demonstrate a complete measurement of the azimuthal phase in a hexagonal optical lattice employing a versatile method based on time-of-flight imaging after off-resonant lattice modulation. Furthermore we map out the merging transition of the two Dirac points induced by beam imbalance. Our work paves the way to accessing geometric properties in optical lattices also with spin-orbit coupling and interactions.
Estimating covariance functions of multivariate skew-Gaussian random fields on the sphere
Creators: name: Alegría, Alfredo
name: Caro, Sandra
name: Bevilacqua, Moreno
name: Porcu, Emilio
name: Clarke, Jorge
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: This paper considers a multivariate spatial random field, with each component having univariate marginal distributions of the skew-Gaussian type. We assume that the field is defined spatially on the unit sphere embedded in $\mathbb{R}^3$, allowing for modeling data available over large portions of planet Earth. This model admits explicit expressions for the marginal and cross covariances. However, the $n$-dimensional distributions of the field are difficult to evaluate, because it requires the sum of $2^n$ terms involving the cumulative and probability density functions of a $n$-dimensional Gaussian distribution. Since in this case inference based on the full likelihood is computationally unfeasible, we propose a composite likelihood approach based on pairs of spatial observations. This last being possible thanks to the fact that we have a closed form expression for the bivariate distribution. We illustrate the effectiveness of the method through simulation experiments and the analysis of a real data set of minimum and maximum temperatures.
Effects of heterogeneity in site-site couplings for tight-binding models on scale-invariant structures
Creators: name: Yang, Bingjia
name: Xie, Pinchen
name: Zhang, Zhongzhi
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We studied the thermodynamic behaviors of non-interacting bosons and fermions trapped by a scale-invariant branching structure of adjustable degree of heterogeneity. The full energy spectrum in tight-binding approximation was analytically solved . We found that the log-periodic oscillation of the specific heat for Fermi gas depended on the heterogeneity of hopping. Also, low dimensional Bose-Einstein condensation occurred only for non-homogeneous setup.
Klimawandel & Gesundheit: Verbesserung der Gesundheitsvorsorge vulnerabler Bevölkerung in Afrika durch räumlich hochaufgelöstes Monitoring der natürlichen und anthropogenen Umwelt
Creators: name: Bärnighausen, Till
Publisher: name: Forum Marsilius-Kolleg
Year: 2022

description: Prof. Dr. Dr. Till Bärnighausen (Epidemiologie / Global Health) informiert über Verlauf und Ergebnisse seiner Fellowship innerhalb der Zeitspanne vom 1. Oktober 2021 bis 30. September 2022. An dem interdisziplinären Fellow-Projekt „Klimawandel & Gesundheit: Verbesserung der Gesundheitsvorsorge vulnerabler Bevölkerung in Afrika durch räumlich hochaufgelöstes Monitoring der natürlichen und anthropogenen Umwelt“ war außerdem Prof. Dr. Alexander Zipf beteiligt (Bericht in diesem Band).
description: Forum Marsilius-Kolleg, Bd. 22 Nr. 2 (2022): Jahresbericht 2021/22
Multipartite entanglement detection for hypergraph states
Creators: name: Ghio, Maddalena
name: Malpetti, Daniele
name: Rossi, Matteo
name: Bruß, Dagmar
name: Macchiavello, Chiara
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the entanglement properties of quantum hypergraph states of $n$ qubits, focusing on multipartite entanglement. We compute multipartite entanglement for hypergraph states with a single hyperedge of maximum cardinality, for hypergraph states endowed with all possible hyperedges of cardinality equal to $n-1$ and for those hypergraph states with all possible hyperedges of cardinality greater than or equal to $n-1$. We then find a lower bound to the multipartite entanglement of a generic quantum hypergraph state. We finally apply the multipartite entanglement results to the construction of entanglement witness operators, able to detect genuine multipartite entanglement in the neighbourhood of a given hypergraph state. We first build entanglement witnesses of the projective type, then propose a class of witnesses based on the stabilizer formalism, hence called stabilizer witnesses, able to reduce the experimental effort from an exponential to a linear growth in the number of local measurement settings with the number of qubits.
Spectral sum rules for conformal field theories in arbitrary dimensions
Creators: name: Chowdhury, Subham Dutta
name: David, Justin R.
name: Prakash, Shiroman
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We derive spectral sum rules in the shear channel for conformal field theories at finite temperature in general $d\geq 3$ dimensions. The sum rules result from the OPE of the stress tensor at high frequency as well as the hydrodynamic behaviour of the theory at low frequencies. The sum rule states that a weighted integral of the spectral density over frequencies is proportional to the energy density of the theory. We show that the proportionality constant can be written in terms the Hofman-Maldacena variables $t_2, t_4$ which determine the three point function of the stress tensor. For theories which admit a two derivative gravity dual this proportionality constant is given by $\frac{d}{2(d+1)}$. We then use causality constraints and obtain bounds on the sum rule which are valid in any conformal field theory. Finally we demonstrate that the high frequency behaviour of the spectral function in the vector and the tensor channel are also determined by the Hofman-Maldacena variables.
description: Corrected typos, JHEP version
An Active Learning Approach to the Falsification of Black Box Cyber-Physical Systems
Creators: name: Silvetti, Simone
name: Policriti, Alberto
name: Bortolussi, Luca
Publisher: name: arXiv
Year: 2017
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: Search-based testing is widely used to find bugs in models of complex Cyber-Physical Systems. Latest research efforts have improved this approach by casting it as a falsification procedure of formally specified temporal properties, exploiting the robustness semantics of Signal Temporal Logic. The scaling of this approach to highly complex engineering systems requires efficient falsification procedures, which should be applicable also to black box models. Falsification is also exacerbated by the fact that inputs are often time-dependent functions. We tackle the falsification of formal properties of complex black box models of Cyber-Physical Systems, leveraging machine learning techniques from the area of Active Learning. Tailoring these techniques to the falsification problem with time-dependent, functional inputs, we show a considerable gain in computational effort, by reducing the number of model simulations needed. The goodness of the proposed approach is discussed on a challenging industrial-level benchmark from automotive.
description: 15 pages, 2 figures
How to Reconcile the Observed Velocity Function of Galaxies with Theory
Creators: name: Brooks, Alyson M.
name: Papastergis, Emmanouil
name: Christensen, Charlotte R.
name: Governato, Fabio
name: Stilp, Adrienne
name: Quinn, Thomas R.
name: Wadsley, James
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Within a Lambda Cold Dark Matter (LCDM) scenario, we use high resolution cosmological simulations spanning over four orders of magnitude in galaxy mass to understand the deficit of dwarf galaxies in observed velocity functions. We measure velocities in as similar a way as possible to observations, including generating mock HI data cubes for our simulated galaxies. We demonstrate that this apples-to-apples comparison yields an "observed" velocity function in agreement with observations, reconciling the large number of low-mass halos expected in a LCDM cosmological model with the low number of observed dwarfs at a given velocity. We then explore the source of the discrepancy between observations and theory, and conclude that the dearth of observed dwarf galaxies is primarily explained by two effects. The first effect is that galactic rotational velocities derived from the HI linewidth severely underestimate the maximum halo velocity. The second effect is that a large fraction of halos at the lowest masses are too faint to be detected by current galaxy surveys. We find that cored dark matter density profiles can contribute to the lower observed velocity of galaxies, but only for galaxies in which the velocity is measured interior to the size of the core (~3 kpc).
description: updated after acceptance for publication in ApJ
On the number of inequivalent Gabidulin codes
Creators: name: Schmidt, Kai-Uwe
name: Zhou, Yue
Publisher: name: arXiv
Year: 2017
Subjects: subject: Combinatorics (math.CO)
subject: Information Theory (cs.IT)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: Maximum rank-distance (MRD) codes are extremal codes in the space of $m\times n$ matrices over a finite field, equipped with the rank metric. Up to generalizations, the classical examples of such codes were constructed in the 1970s and are today known as Gabidulin codes. Motivated by several recent approaches to construct MRD codes that are inequivalent to Gabidulin codes, we study the equivalence issue for Gabidulin codes themselves. This shows in particular that the family of Gabidulin codes already contains a huge subset of MRD codes that are pairwise inequivalent, provided that $2\le m\le n-2$.
description: 11 pages
Neue Perspektiven von den Young Marsilius Fellows
Creators: name: Ananth, Swetha
Publisher: name: Forum Marsilius-Kolleg
Year: 2022

description: Das Young Marsilius Fellow Program for Interdisciplinarity and Science Communication (YMFP) zeichnet exzellente Postdoktorand:innen der Universität Heidelberg und der umliegenden außeruniversitären Forschungseinrichtungen aus und fördert ihre interdisziplinäre Anschlussfähigkeit sowie ihr Engagement für die Wissenschaftskommunikation. Swetha Ananth berichtet über ihre Erfahrung als eine der ersten zwölf Young Marsilius Fellows im Zeitraum vom 1. Oktober 2021 bis zum 30. September 2022.
description: Forum Marsilius-Kolleg, Bd. 22 Nr. 2 (2022): Jahresbericht 2021/22