cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Spontaneous formation of a non-uniform chiral spin liquid in moat-band lattices
Creators: name: Sedrakyan, Tigran A.
name: Glazman, Leonid I.
name: Kamenev, Alex
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: A number of lattices exhibit moat-like band structures, i.e. a band with infinitely degenerate energy minima attained along a closed line in the Brillouin zone. If such a lattice is populated with hard-core bosons, the degeneracy prevents their condensation. At half-filling, the system is equivalent to $s=1/2$ XY model at zero magnetic field, while absence of condensation translates into the absence of magnetic order in the XY plane. Here we show that the ground state breaks the time-reversal as well as inversion symmetries. This state, which may be identified with the chiral spin liquid, has a bulk gap and chiral gapless edge excitations. The applications of the developed analytical theory include an explanation of recent numerical findings and a suggestion for the chiral spin liquid realizations in experiments with cold atoms in optical lattices.
description: 4+ pages, 4 figures, revtex4
title: Benchmarking the Second Generation of Intel SGX for Machine Learning Workloads
Creators: name: Lutsch, Adrian
name: Singh, Gagandeep
name: Mundt, Martin
name: Mogk, Ragnar
name: Binnig, Carsten
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2023
Subjects: subject: Trusted Execution Environments||Intel SGX||Machine Learning||Benchmarking

description: For domains with high data privacy and protection demands, such as health care and finance, outsourcing machine learning tasks often requires additional security measures. Trusted Execution Environments like Intel SGX are a powerful tool to achieve this additional security. Until recently, Intel SGX incurred high performance costs, mainly because it was severely limited in terms of available memory and CPUs. With the second generation of SGX, Intel alleviates these problems. Therefore, we revisit previous use cases for ML secured by SGX and show initial results of a performance study for ML workloads on SGXv2.
Optimal electrode geometries for 2-dimensional ion arrays with bi-layer ion traps
Creators: name: Krauth, F. N.
name: Alonso, J.
name: Home, J. P.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We investigate electrode geometries required to produce periodic 2-dimensional ion-trap arrays with the ions placed between two planes of electrodes. We present a generalization of previous methods for traps containing a single electrode plane to this new geometry, and show that for a given ion-electrode distance and applied voltages, the inter-ion distance can be reduced by a factor of up to 3 relative to single-plane traps. This represents an increase by a factor of 9 in the trap density and a factor of 27 in the exchange coupling between the oscillatory motion of neighboring ions. The resulting traps are also considerably deeper for bi-layer structures than for single-plane traps. These results could offer a useful path towards 2-dimensional ion arrays for quantum simulation. We also discuss issues with the fabrication of such traps.
3D morphology of a random field from its 2D cross-section
Creators: name: Makarenko, Irina
name: Fletcher, Andrew
name: Shukurov, Anvar
Publisher: name: arXiv
Year: 2014
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We show that both aspect ratios of randomly oriented triaxial ellipsoids (representing isosurfaces of an isotropic 3D random field) can be determined from a single 2D cross-section of their sample using the probability distribution of the filamentarity F of the structures seen in the cross-section (F=0 for a circle and F=1 for a line). The probability distribution of F has a robust form with a sharp maximum and truncation that are sensitive to the ellipsoids' aspect ratios. We show that the aspect ratios of triaxial ellipsoids with randomly distributed dimensions can still be recovered from the probability distribution of F. This method is applicable to many shape recognition and classification problems, here illustrated with neutral hydrogen density in the turbulent interstellar medium of the Milky Way. The gas distribution is shown to be filamentary with the mean axis ratio 1:2:20.
description: 5 pages, 7 figures, discussion of Galactic turbulence and neutral hydrogen filaments extended; to be published in MNRAS Letters, http://mnrasl.oxfordjournals.org/
title: Semantic Search for Biological Datasets: A Usability Study on Modes of Querying and Explaining Search Results
Creators: name: Löffler, Felicitas
name: Shafiei, Fateme
name: Witte, René
name: König-Ries, Birgitta
name: Klan, Friederike
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2023
Subjects: subject: Dataset Search||Semantic Search||Biodiversity||Life Sciences||User Interface||Usability

description: Dataset discovery is a frequent task in daily research practice, yet studies are missing that explore the usability of user interfaces (UI) in data portals. In particular, very few user studies exist that analyze whether particular elements in the user interface are useful for search tasks. We aim to address those needs for more specific usability evaluations in dataset search. In this work, wepresent a flexible semantic search over biological datasets with two user interfaces. The search result contains semantically related terms, such as synonyms or more specific terms, obtained from domain ontologies. We evaluated the system in a user study with 20 scholars. We focused on two components, the query input to explore a search in categories (entity types) in comparision to a single input field, and we analyzed textual highlightings in the returned datasets to study whether users are distracted by semantic information such as URIs. Our results show that users prefer interfaces with a single input field for search tasks they are not familiar with, and that users appreciate explanations with terminologies and URIs.
title: La professione dell’educatore nel sistema integrato zerosei. Ricerca, innovazione e sostenibilità nel contesto territoriale romano
Creators: name: oretti, Giovanni M
name: La Rocca, Concetta
name: Aluffi Pentini, Anna
Publisher: name: Roma TrE-Press
Year: 2023

description:

Il volume risponde alla esigenza di dare un contributo alla riflessione sulle dimensioni culturali, pedagogiche e politiche implicate nella definizione del ruolo e delle funzioni dell’educatore. La prospettiva qui delineata è quella di un professionista consapevole che opera nell’ambito del sistema integrato zerosei (Legge 107/2015; Dlg 65/2017). I saggi raccolti nel volume convergono nel fare emergere i temi dell’innovazione e della sostenibilità delle prassi educative, in relazione sia alle esperienze di ricerca condotte nell’Area metropolitana di Roma e nel più ampio territorio della regione Lazio, sia alle buone pratiche che caratterizzano le attività di tirocinio dei percorsi di formazione iniziale degli educatori realizzati dalle Università. Il volume si articola in tre sezioni: il quadro pedagogico, teorico, culturale e politico; la descrizione di ricerche empiriche svolte sul territorio romano; le pratiche di tirocinio messe in campo nei Corsi di Laurea L-19. Mediante la presente pubblicazione gli autori intendono sviluppare il confronto avviato nel Seminario di studi “La professione dell’educatore nel sistema integrato zerosei: ricerca, innovazione e sostenibilità”, promosso da un gruppo di docenti del Dipartimento di Scienze della Formazione dell’Università Roma Tre.
Exploring an Alternative Channel of Evolution Towards SNa Ia Explosion
Creators: name: Chiosi, E.
name: Chiosi, C.
name: Trevisan, P.
name: Piovan, L.
name: Orio, M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In this paper we explore the possibility that isolated CO-WDs with mass smaller than the Chandrasekhar limit may undergo nuclear runaway and SNa explosion, triggered by the energy produced by under-barrier pycno-nuclear reactions between carbon and light elements. Such reactions would be due to left over impurities of the light elements, which would remain inactive until the WDs transit from the liquid to the solid state. We devise a simple formulation for the coulombian potential and the local density in a ionic lattice affected by impurities and introduce it in the known rates of pycno-nuclear reactions for multi-component plasmas. Our semi-analytical results indicate that the energy generated by these pycno-nuclear reactions exceeds the WD luminosity and provides enough energy to elementary cells of matter to balance the energy cost for C-ignition at much younger ages than the age of the Universe, even for WDs with masses as low as $\simeq 0.85\, M_\odot$. A thermonuclear runaway may thus be triggered in isolated WDs. The explosion would occur from few hundred thousand to a few million years after the WD formation in the mass interval $0.85 - 1.2\, M_\odot$.
description: 29 pages, 15 figures, 7 tables, new paragraph added, MNRAS accepted
Vigorous thermal excitations in a double-tetrahedral chain of localized Ising spins and mobile electrons mimic a temperature-driven first-order phase transition
Creators: name: Galisova, Lucia
name: Strecka, Jozef
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: A hybrid spin-electron system defined on one-dimensional double-tetrahedral chain, in which the localized Ising spin regularly alternates with two mobile electrons delocalized over a triangular plaquette, is exactly solved with the help of generalized decoration-iteration transformation. It is shown that a macroscopic degeneracy of ferromagnetic and ferrimagnetic ground states arising from chiral degrees of freedom of the mobile electrons cannot be lifted by a magnetic field in contrast to a macroscopic degeneracy of the frustrated ground state, which appears owing to a kinetically-driven frustration of the localized Ising spins. An anomalous behavior of all basic thermodynamic quantities can be observed on account of massive thermal excitations, which mimic a temperature-driven first-order phase transition from the non-degenerate frustrated state to the highly degenerate ferrimagnetic state at non-zero magnetic fields. A substantial difference in the respective degeneracies is responsible for an immense low-temperature peak of the specific heat and very abrupt (almost discontinuous) thermal variations of the entropy and sublattice magnetizations.
description: 10 pages, 8 figures
Scaling laws and fluctuations in the statistics of word frequencies
Creators: name: Gerlach, Martin
name: Altmann, Eduardo G.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Computation and Language (cs.CL)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: In this paper we combine statistical analysis of large text databases and simple stochastic models to explain the appearance of scaling laws in the statistics of word frequencies. Besides the sublinear scaling of the vocabulary size with database size (Heaps' law), here we report a new scaling of the fluctuations around this average (fluctuation scaling analysis). We explain both scaling laws by modeling the usage of words by simple stochastic processes in which the overall distribution of word-frequencies is fat tailed (Zipf's law) and the frequency of a single word is subject to fluctuations across documents (as in topic models). In this framework, the mean and the variance of the vocabulary size can be expressed as quenched averages, implying that: i) the inhomogeneous dissemination of words cause a reduction of the average vocabulary size in comparison to the homogeneous case, and ii) correlations in the co-occurrence of words lead to an increase in the variance and the vocabulary size becomes a non-self-averaging quantity. We address the implications of these observations to the measurement of lexical richness. We test our results in three large text databases (Google-ngram, Enlgish Wikipedia, and a collection of scientific articles).
description: 19 pages, 4 figures
title: CLOCQ: A Toolkit for Fast and Easy Access to Knowledge Bases
Creators: name: Christmann, Philipp
name: Roy, Rishiraj Saha
name: Weikum, Gerhard
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2023
Subjects: subject: Knowledge Base||Knowledge Graph||RDF||Efficiency

description: Curated knowledge bases (KBs) store vast amounts of factual world knowledge, and are therefore ubiquitous in many information retrieval (IR) and natural language processing (NLP) applications like question answering, named entity disambiguation, or knowledge exploration. Despite that, accessing information from complete knowledge bases is often a daunting task. Researchers and practitioners typically have crisp use cases in mind, for which standard querying interfaces can be overly complex and inefficient. We aim to bridge this gap, and release a public toolkit that provides functionalities for common KB access use cases, and make it available via a public API. Experiments show efficiency improvements over existing KB interfaces for various important functionalities.
Autonomous robots and the SP theory of intelligence
Creators: name: Wolff, J. Gerard
Publisher: name: arXiv
Year: 2014
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: This article is about how the "SP theory of intelligence" and its realisation in the "SP machine" (both outlined in the article) may help to solve computer-related problems in the design of autonomous robots, meaning robots that do not depend on external intelligence or power supplies, are mobile, and are designed to exhibit as much human-like intelligence as possible. The article is about: how to increase the computational and energy efficiency of computers and reduce their bulk; how to achieve human-like versatility in intelligence; and likewise for human-like adaptability in intelligence. The SP system has potential for substantial gains in computational and energy efficiency and reductions in the bulkiness of computers: by reducing the size of data to be processed; by exploiting statistical information that the system gathers; and via an updated version of Donald Hebb's concept of a "cell assembly". Towards human-like versatility in intelligence, the SP system has strengths in unsupervised learning, natural language processing, pattern recognition, information retrieval, several kinds of reasoning, planning, problem solving, and more, with seamless integration amongst structures and functions. The SP system's strengths in unsupervised learning and other aspects of intelligence may help to achieve human-like adaptability in intelligence via: the learning of natural language; learning to see; building 3D models of objects and of a robot's surroundings; learning regularities in the workings of a robot and in the robot's environment; exploration and play; learning major skills; and secondary forms of learning. Also discussed are: how the SP system may process parallel streams of information; generalisation of knowledge, correction of over-generalisations, and learning from dirty data; how to cut the cost of learning; and reinforcements, motivations, goals, and demonstration.
title: RMG Sort: Radix-Partitioning-Based Multi-GPU Sorting
Creators: name: Ilic, Ivan
name: Tolovski, Ilin
name: Rabl, Tilmann
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2023
Subjects: subject: Multi-GPU sorting||radix partitioning||high-speed interconnects||database acceleration

description: In recent years, graphics processing units (GPUs) emerged as database accelerators due to their massive parallelism and high-bandwidth memory. Sorting is a core database operation with many applications, such as output ordering, index creation, grouping, and sort-merge joins. Many single-GPU sorting algorithms have been shown to outperform highly parallel CPU algorithms. Today's systems include multiple GPUs with direct high-bandwidth peer-to-peer (P2P) interconnects. However, previous multi-GPU sorting algorithms do not efficiently harness the P2P transfer capability of modern interconnects, such as NVLink and NVSwitch.In this paper, we propose RMG sort, a novel radix partitioning-based multi-GPU sorting algorithm. We present a most-significant-bit partitioning strategy that efficiently utilizes high-speed P2P interconnects while reducing inter-GPU communication. Independent of the number of GPUs, we exchange radix partitions between the GPUs in one all-to-all P2P swap. We evaluate RMG sort on two modern multi-GPU systems. Our experiments show that RMG sort scales well with the number of GPUs and outperforms a parallel CPU-based sort by up to 20x. Compared to two state-of-the-art merge-based multi-GPU sorting algorithms, we achieve speedups of up to 1.3x and 1.8x across both systems.
title: Globalization from below and transition economies
Creators: name: Dostanic, Andjela
Year: 2021

description: Diese Dissertation diskutiert das Phänomen des relativ neuen Zusammenspiels von Globalisierung von unten und Globalisierung von oben in Transformationsökonomien in europäischen postsozialistischen Städten anhand von chinesischen Unternehmertumspraktiken in Belgrad. Konkret untersucht die Dissertation verschiedene Arten, wie chinesische Unternehmer verschiedenen Zielen lokaler und staatlicher Behörden (unter dem Druck internationaler Finanzinstitutionen und Vereinbarungen) erliegen und/oder sich dagegen wehren, ihre Aktivitäten zu regulieren und zu kontrollieren, indem sie Bankgeschäfte, Formalisierung und Fiskalisierung auferlegen, um zu zeigen, wie Globalisierung von oben versucht in Belgrad die Globalisierung von unten zu gestalten und zu unterdrücken. Ich werde die Ermöglichung des chinesischen informellen Unternehmertums durch den Staat in der Anfangsphase des Übergangs diskutieren und mit den Versuchen, es in späteren Phasen zu kontrollieren, vergleichen, um das Verständnis der komplexen Beziehungen zwischen postsozialistischen Städten und Globalisierung zu erweitern.
description: This thesis will discuss the phenomenon of the relatively new interplay of globalization from below and globalization from above in transition economies in European post-socialist cities by looking at Chinese entrepreneurship practices in Belgrade. Specifically, the thesis explores different ways Chinese entrepreneurs have been succumbing to and/ or resisting different aims of local and state authorities (pressured by international financial institutions and agreements) to regulate and control their activities by imposing banking, formalization and fiscalization to show how globalization from above attempts to shape and suppress globalization from below in Belgrade. I will discuss the state’s enabling of Chinese informal entrepreneurship in the beginning phase of transition and compare it with the attempts to control it in later stages with a scope to broaden understanding of complex relations between post-socialist cities and globalization.
Testing Radiative Neutrino Mass Models at the LHC
Creators: name: Cai, Yi
name: Clarke, Jackson D.
name: Schmidt, Michael A.
name: Volkas, Raymond R.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The Large Hadron Collider provides us new opportunities to search for the origin of neutrino mass. Beyond the minimal see-saw models a plethora of models exist which realise neutrino mass at tree- or loop-level, and it is important to be sure that these possibilities are satisfactorily covered by searches. The purpose of this paper is to advance a systematic approach to this problem. Majorana neutrino mass models can be organised by SM-gauge-invariant operators which violate lepton number by two units. In this paper we write down the minimal ultraviolet completions for all of the mass-dimension 7 operators. We predict vector-like quarks, vector-like leptons, scalar leptoquarks, a charged scalar, and a scalar doublet, whose properties are constrained by neutrino oscillation data. A detailed collider study is presented for $O_3=LLQ\bar dH$ and $O_8 = L\bar d\bar e^\dagger \bar u^\dagger H$ completions with a vector-like quark $χ\sim(3, 2, -\frac{5}{6})$ and a leptoquark $ϕ\sim(\bar 3,1,\frac{1}{3})$. The existing LHC limits extracted from searches for vector-like fermions and sbottoms/stops are $m_χ\gtrsim 620$ GeV and $m_ϕ\gtrsim 600$ GeV.
description: 40 pages, 13 figures; references added, minor changes, matches JHEP version
Top Partners and Higgs Boson Production
Creators: name: Chen, Chien-Yi
name: Dawson, S.
name: Lewis, I. M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The Higgs boson is produced at the LHC through gluon fusion at roughly the Standard Model rate. New colored fermions, which can contribute to $gg\rightarrow h$, must have vector-like interactions in order not to be in conflict with the experimentally measured rate. We examine the size of the corrections to single and double Higgs production from heavy vector-like fermions in $SU(2)_L$ singlets and doublets and search for regions of parameter space where double Higgs production is enhanced relative to the Standard Model prediction. We compare production rates and distributions for double Higgs production from gluon fusion using an exact calculation, the low energy theorem (LET), where the top quark and the heavy vector-like fermions are taken to be infinitely massive, and an effective theory (EFT) where top mass effects are included exactly and the effects of the heavy fermions are included to ${\cal O}(1/M^2_X)$. Unlike the LET, the EFT gives an extremely accurate description of the kinematic distributions for double Higgs production.
description: 37 pages, 11 figures. Minor changes to Figs. 8-11
Supplementary document for Nonlinear optics in 2D materials: focus on the contributions from Latin America - 6324171.pdf
Creators: name: De Matos, Christiano
name: Rosa, Henrique
name: Zapata, Juan
name: Steinberg, David
name: Cantillo, Melissa Maldonado
name: De Souza, Thoroh
name: de Paula, Ana Maria
name: Malard, Leandro
name: Gomes, Anderson S.
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: Uncategorized

description: Supplemental document.
An Estimate of the Spectral Intensity Expected from the Molecular Bremsstrahlung Radiation in Extensive Air Showers
Creators: name: Samarai, I. Al
name: Deligny, O.
name: Lebrun, D.
name: Letessier-Selvon, A.
name: Salamida, F.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: A detection technique of ultra-high energy cosmic rays, complementary to the fluorescence technique, would be the use of the molecular Bremsstrahlung radiation emitted by low-energy electrons left after the passage of the showers in the atmosphere. The emission mechanism is expected from quasi-elastic collisions of electrons produced in the shower by the ionisation of the molecules in the atmosphere. In this article, a detailed calculation of the spectral intensity of photons at ground level originating from the transitions between unquantised energy states of free ionisation electrons is presented. In the absence of absorption of the emitted photons in the plasma, the obtained spectral intensity is shown to be 5 10^{-26} W m^{-2}Hz^{-1} at 10 km from the shower core for a vertical shower induced by a proton of 10^{17.5} eV.
description: 16 pages, 6 figures, accepted in Astroparticle Physics. Compared to v1 version: 1. Inclusion of ro-vibrational processes. 2. Use of more accurate ionization potential values and energy distribution of the secondary electrons
title: Workshop on Data Engineering for Data Science (DE4DS)
Creators: name: Schenkel, Ralf
name: Scherp, Ansgar
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2023

description: Der Workshop „Data Engineering for Data Science“ zielt auf Aspekte des Data Engineering, die zwar zentrale Bestandteile jedes Data-Science-Projektes sind, aber in der Forschung oft zugunsten von eher mathematischen Aspekten zu kurz kommen. Typische Themen, die wir auf dem Workshop erwarten, sind z.B. Datenaufbereitung und -integration, skalierbare Verarbeitung von Data-Science-Prozessen, Datenqualität und Benchmarks (siehe auch die Themenliste im Call for Papers unten). Neben wissenschaftlichen Beiträgen sind auch eher praktisch orientierte Beiträge über Werkzeuge und Anwendungen willkommen. Je nach Anzahl der angenommenen Beiträge sind eingeladene Vorträge vorgesehen.
Spherical Jeans analysis for dark matter indirect detection in dwarf spheroidal galaxies - Impact of physical parameters and triaxiality
Creators: name: Bonnivard, V.
name: Combet, C.
name: Maurin, D.
name: Walker, M. G.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Dwarf spheroidal (dSph) galaxies are among the most promising targets for the indirect detection of dark matter (DM) from annihilation and/or decay products. Empirical estimates of their DM content - and hence the magnitudes of expected signals - rely on inferences from stellar-kinematic data. However, various kinematic analyses can give different results and it is not obvious which are most reliable. Using extensive sets of mock data of various sizes (mimicking 'ultra-faint' and 'classical' dSphs) and an MCMC engine, here we investigate biases, uncertainties, and limitations of analyses based on parametric solutions to the spherical Jeans equation. For a variety of functional forms for the tracer and DM density profiles, as well as the orbital anisotropy profile, we examine reliability of estimates for the astrophysical J- and D-factors for annihilation and decay, respectively. For large (N > 1000) stellar-kinematic samples typical of 'classical' dSphs, errors tend to be dominated by systematics, which can be reduced through the use of sufficiently general and flexible functional forms. For small (N < 100) samples typical of 'ultrafaints', statistical uncertainties tend to dominate systematic errors and flexible models are less necessary. We define an optimal strategy that would mitigate sensitivity to priors and other aspects of analyses based on the spherical Jeans equation. We also find that the assumption of spherical symmetry can bias estimates of J (with the 95% credibility intervals not encompassing the true J-factor) when the object is mildly triaxial (axis ratios b/a = 0.8, c/a = 0.6). A concluding table summarises the typical error budget and biases for the different sample sizes considered.
description: 21 pages, 20 figures. Minor changes (several clarifications): match the MNRAS accepted version
title: A Tutorial Workshop on ML for Systems and Systems for ML
Creators: name: Luthra, Manisha
name: Kipf, Andreas
name: Böhm, Matthias
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2023

description: This is a proposal for the Learned Systems workshop planned for March 7th, 2023 inconjunction with the BTW2023 conference in Dresden. This tutorial-like workshop will bring togetherrenowned researchers and practitioners at the intersection of machine learning and (database) systems.There will be invited/nominated talks on two topics of concern: (1) how machine learning can improve(database) systems and (2) how scalable and efficient system design can improve machine learningpipelines. A strategic goal of this workshop is to encourage discussion between all the participants—speakers of original authors of the already peer-reviewed work and BTW participants—and thus,foster collaborations among the participants. We aim to give priority to early career researchers inour selection process to boost their work and gain visibility in the most important database systemsconference in Germany.
Bias in the Effective Field Theory of Large Scale Structures
Creators: name: Senatore, Leonardo
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study how to describe collapsed objects, such as galaxies, in the context of the Effective Field Theory of Large Scale Structures. The overdensity of galaxies at a given location and time is determined by the initial tidal tensor, velocity gradients and spatial derivatives of the regions of dark matter that, during the evolution of the universe, ended up at that given location. Similarly to what recently done for dark matter, we show how this Lagrangian space description can be recovered by upgrading simpler Eulerian calculations. We describe the Eulerian theory. We show that it is perturbatively local in space, but non-local in time, and we explain the observational consequences of this fact. We give an argument for why to a certain degree of accuracy the theory can be considered as quasi time-local and explain what the operator structure is in this case. We describe renormalization of the bias coefficients so that, after this and after upgrading the Eulerian calculation to a Lagrangian one, the perturbative series for galaxies correlation functions results in a manifestly convergent expansion in powers of $k/k_{\rm NL}$ and $k/k_{\rm M}$, where $k$ is the wavenumber of interest, $k_{\rm NL}$ is the wavenumber associated to the non-linear scale, and $k_{\rm M}$ is the comoving wavenumber enclosing the mass of a galaxy.
description: 45 pages; v2: added explanations, minor corrections and references
Covariant Stückelberg analysis of de Rham-Gabadadze-Tolley massive gravity with a general fiducial metric
Creators: name: Gao, Xian
name: Kobayashi, Tsutomu
name: Yamaguchi, Masahide
name: Yoshida, Daisuke
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Stückelberg analysis of nonlinear massive gravity in the presence of a general fiducial metric is investigated. We develop a "covariant" formalism for the Stückelberg expansion by working with a local inertial frame, through which helicity modes can be characterized correctly. Within this covariant approach, an extended $Λ_3$ decoupling limit analysis can be consistently performed, which keeps $\bar{R}_{μνρσ}/m^2$ fixed with $\bar{R}_{μνρσ}$ the Riemann tensor of the fiducial metric. In this extended decoupling limit, the scalar mode $π$ acquires self-interactions due to the presence of the curvature of the fiducial metric. However, the equation of motion for $π$ remains of second order in derivatives, which extends the understanding of the absence of the Boulware Deser ghost in the case of a flat fiducial metric.
description: 16 pages, 1 figure; v2 published version
title: Developing OERs for Teaching Database Systems
Creators: name: Rakow, Thomas C.
name: Kless, André
name: Hasler, Charlotte
name: Knolle, Harm
name: Faeskorn-Woyke, Heide
name: Saatz, Inga Marina
name: Lambert, Jens
name: Focken, Mareike
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2023
Subjects: subject: database systems||open educational resources (OERs)||higher education

description: In the project EILD.nrw, Open Educational Resources (OER) have been developed for teaching databases. Lecturers can use the tools and courses in a variety of learning scenarios. Students of computer science and application subjects can learn the complete life cycle of databases. For this purpose, quizzes, interactive tools, instructional videos, and courses for learning management systems are developed and published under a Creative Commons license. We give an overview of the developed OERs according to subject, description, teaching form, and format. Following, we describe how licencing, sustainability, accessibility, contextualization, content description, and technical adaptability are implemented. The feedback of students in ongoing classes are evaluated.
Defect (p,q) Five-branes
Creators: name: Kimura, Tetsuji
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study a local description of composite five-branes of codimension two. The formulation is constructed by virtue of $SL(2,{\mathbb Z}) \times SL(2,{\mathbb Z)}$ monodromy associated with two-torus. Applying conjugate monodromy transformations to the complex structures of the two-torus, we obtain a field configuration of a defect $(p,q)$ five-brane. This is a composite state of $p$ defect NS5-branes and $q$ exotic $5^2_2$-branes. We also obtain a new example of hyper-Kähler geometry. This is an ALG space, a generalization of an ALF space which asymptotically has a tri-holomorphic two-torus action. This geometry appears in the conjugate configuration of a single defect KK5-brane.
description: 22 pages, version published in Nuclear Physics B
Excitability of lasers with integrated dispersive reflector
Creators: name: Tronciu, Vasile Z.
name: Wünsche, Hans-Jürgen
name: Schneider, Klaus R.
name: Radziunas, Mindaugas
Publisher: name: Weierstrass Institute
Year: 2001
Subjects: subject: semiconductor laser
subject: excitability
subject: dispersive reflector
subject: optical feedback
subject: 78A60
subject: 34C60

description: This paper is concerned with the phenomenon of excitability in semiconductor lasers consisting of a DFB section and a passive dispersive reflector (PDR). We assume that the PDR section contains a Bragg grating and (or) a passive Fabry Perot filter guaranteeing a dispersive reflection of the optical field. We investigate a single mode model for PDR lasers and derive conditions under which excitable behavior can be demonstrated. Especially, we show the existence of a threshold, that is, only perturbations above the threshold imply a large excursion from the steady state, and where the response is almost independent of the strength of the perturbation, moreover we establish the existence of a refractory period, i.e., if a second perturbation is applied before the refractory time has passed, then the system does not respond. Finally, we discuss the importance of excitability for the transmission of signals in communication networks.
title: Value-specific Weighting for Record-level Encodings in Privacy-Preserving Record Linkage
Creators: name: Rohde, Florens
name: Franke, Martin
name: Christen, Victor
name: Rahm, Erhard
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2023
Subjects: subject: Privacy-preserving record linkage||Bloom filter||Weighting||Value-specific

description: Privacy-preserving record linkage (PPRL) determines records representing the same entitywhile guaranteeing the privacy of individuals. A common approach is to encode plaintext data ofrecords into Bloom filters that enable efficient calculation of similarities. A crucial step of PPRL isthe classification of Bloom filter pairs as match or non-match based on computed similarities. In thecontext of record linkage, several weighting schemes and classification methods are available. Themajority of weighting methods determine and adapt weights by applying the Fellegi&Sunter modelfor each attribute. In the PPRL domain, the attributes of a record are encoded in a joint record-levelBloom filter to impede cryptanalysis attacks so that the application of existing attribute-wise weightingapproaches is not feasible. We study methods that use attribute-specific weights in record-levelencodings and integrate weight adaptation approaches based on individual value frequencies. Theexperiments on real-world datasets show that frequency-dependent weighting schemes improve thelinkage quality as well as the robustness with regard to the threshold selection.
title: Towards a User-Empowering Architecture for Trustability Analytics
Creators: name: Bruchhaus, Sebastian
name: Reis, Thoralf
name: Bornschlegl, Marco Xaver
name: Störl, Uta
name: Hemmje, Matthias
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2023
Subjects: subject: Trust||Machine Learning||Digital Humanities||Foundation Model||Transparency||XAI

description: Machine learning (ML) thrives on big data like huge data sets and streams from IOT devices. Those technologies are becoming increasingly commonplace in our day to day existence. Learning autonomous intelligent actors (AIAs) impact our lives already in the form of, e.g. chat bots, medical expert systems, and facial recognition systems. Doubts concerning ethical, legal, and social implications of such AIAs become increasingly compelling in consequence. Our society now finds itself confronted with decisive questions: Should we trust AI? Is it fair, transparent, and respecting privacy? An individual psychological threshold for cooperation with AIAs has been postulated. In Shaefer’s words: “No trust, no use”. On the other hand, ignorance of an AIA’s weak points and idiosyncrasies can lead to overreliance. This paper proposes a prototypical microservice architecture for trustability analytics. Its architecture shall introduce self-awareness concerning trustability into the AI2VIS4BigData reference model for big data analysis and visualization by borrowing the concept of a “looking-glass self” from psychology.
Prosit to Prosecco! On Sparkling Wine and Geographical Indications
Creators: name: Erlings, Esther
name: Pater, Jessica
Publisher: name: Monash University
Year: 2023
Subjects: classificationCode: 480603
subject: Intellectual property law
classificationCode: 480304
subject: European Union law
classificationCode: 480308
subject: International trade and investment law

description: Since its 2009 adoption of ‘Prosecco’ as a geographical indication (‘GI’) for Italy, the European Union (‘EU’) has sought, and continues to seek, its protection worldwide. Australia, itself a sizeable prosecco producer, has opposed this movement, because it recognises Prosecco as a grape variety, rather than a GI. The grape variety objection has since dominated critique of the EU–Australia stand-off. However, it is only one aspect of the wine GI regime, which includes various rules and exceptions, as well as important interplays between national, supranational (EU) and international levels. This article considers the object and purpose of these multi-level regimes in their determination of GIs, as well as permissible exceptions to wine GI status. It offers a holistic understanding of the wine GI regime and its application to Prosecco. In doing so, it brings to bear the conflicting approaches to wine GIs that will make it difficult to reconcile the EU and Australian position on Prosecco, even with the help of international law.
MPEC 2023-R70 : 2023 RX1
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2023 RX1

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
ТВОРЧЕСТВО УТКИРА ХАШИМОВА – ЭТО УНИКАЛЬНОСТЬ, ХУДОЖЕСТВЕННЫЕ ЯЗЫКОВЫЕ ОСОБЕННОСТИ ЛИТЕРАТУРНЫХ ПРОИЗВЕДЕНИЙ
Creators: name: Ассистент кафедры методика преподавания языками Ургутского филиала Самаркандского Государственного университета имени Шарофа Рашидова Якубова Сафия Хамдамовна
name: Студент 1-курса Факультет педагогики и обучения языками Бегматова Ситора Бекзодовна
Publisher: name: Zenodo
Year: 2025

description: В данной статье Уткир Хашимов известен не только как яркая звезда узбекской литературы, но и как прозаик, драматург и общественный деятель, сыгравший важную роль в современном писательстве, выбравшем тонкий и сложный метод. Художественные произведения Уткира Хашимова обладают уникальным стилем, языком и системой образов, что отличает его произведения от других.
Time resolved transport properties of a $Y$-junction of Tomonaga-Luttinger liquids
Creators: name: Agarwal, Amit
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study time resolved transport properties of a $Y$-junction composed of interacting one-dimensional quantum wires using a bosonization approach. In particular, we investigate the AC conductivity of the $Y$-junction formed from finite length Tomonaga-Luttinger liquid wires based on a plasmon scattering approach for injected charge pulses of arbitrary shapes. In addition, we calculate the tunneling current and quantum noise of the $Y$-junction arising from point-like tunneling impurities at the junction, including finite temperature effects. Our results will be useful for designing nano-electronic quantum circuits, and for interpreting time-resolved experiments [H. Kamata et. al. in Nat. Nanotechnol. 9, 177 (2014)] in interacting wires and their junctions.
description: 11 pages, 5 figures, improved published version
Additional file 3 of Atlas of telomeric repeat diversity in Arabidopsis thaliana
Creators: name: Tao, Yueqi
name: Xian, Wenfei
name: Bao, Zhigui
name: Rabanal, Fernando A.
name: Movilli, Andrea
name: Lanz, Christa
name: Shirsekar, Gautam
name: Weigel, Detlef
Publisher: name: figshare
Year: 2024
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 3: Review history.
title: Transforming Vienna’s Karlsplatz into a stage for musical performance
Creators: name: Simpson, Ryan
Year: 2021

description: Straßenmusiker haben einen prekären Platz im Stadtgefüge – auf der einen Seite tragen sie Geselligkeit in den Stadtraum, auf der anderen Seite haben sie selbst jedoch wenig Kontrolle über die Bedingungen des Raums. Während sich ein Großteil der vorhandenen wissenschaftlichen Literatur auf die Auswirkungen der Straßenmusiker („Busker") auf ihre Umgebung konzentriert, gibt es nur wenige Untersuchungen darüber, wie sich der städtische Raum auf den Musiker auswirkt, insbesondere bezüglich der Art und Weise, wie die Qualitäten des Raums das Auftreten auf der Straße begünstigen oder behindern können, und zu welchen Anpassungen diese den Musiker zwingen. Darüber hinaus werden die meisten bisherigen Studien über Straßenmusiker aus der Außenperspektive der dritten Person durchgeführt. Somit können die komplexen Gedanken und Gefühle des Künstlers jedoch nicht in der Tiefe erfasst werden können, wie es eine Ich-Perspektive erlauben würde. Mit dieser Masterarbeit, eine autoethnographische Studie meiner Erfahrung während des Frühlings und des Sommers 2021 am Karlsplatz in Wien als singender, akkordeonspielender Straßenmusiker, versuche ich, diese Wissenslücken zu füllen. Durch eine Analyse der rechtlichen, sozialen, physischen und akustischen Bedingungen des Stadtraums untersuche ich, inwieweit meine Fähigkeit, einen erfolgreichen Auftritt zu machen, durch die Qualitäten des Stadtraums, in dem ich spiele, geprägt ist. Außerdem beleuchte ich die Taktiken, die ich verwende, um das Beste aus den Bedingungen eines Stadtraums zu machen und mir so den Stadtraum anzueignen.
description: Street musicians have a precarious place in the urban fabric – despite having the ability to bring moments of conviviality to urban spaces, they simultaneously have little control over the conditions of the space in which they perform. While much existing academic literature focuses on the effects of the street musician (“busker”) on their surroundings, there is little research on how the urban space impacts the musician, namely the ways in which its qualities can foster or hinder street performance, and the adaptations these qualities force the musician to make. Additionally, most previous studies on street musicians come from an outside, third-person perspective, meaning that the performer’s intricate thoughts and feelings cannot be captured to the depth that a first-person perspective would allow. I attempt to fill these gaps in knowledge with this thesis, an autoethnographic study of my experience busking with my accordion and voice at Vienna’s Karlsplatz in the spring and summer of 2020. Analyzing the legal, social, physical, and sonic conditions of the space, I explore the extent to which my ability to put on a successful performance is shaped by the qualities of the urban space in which I play. Furthermore, I examine the tactics I use to make the best of a space’s conditions and appropriate it for my own musical purposes.
Anisotropy of the superconducting fluctuations in multiband superconductors: the case of LiFeAs
Creators: name: Fanfarillo, L.
name: Benfatto, L.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Between the different families of pnictide multiband superconductors, LiFeAs is probably one of the less understood. Indeed, despite the large amount of experiments performed in the last few years on this material, no consensus has been reached yet on the possible pairing mechanism at play in this system. Here we focus on the precursor effects of superconductivity visible in the transport experiments performed above Tc. By analyzing the superconducting fluctuations in a layered multiband model appropriate for this material, we argue that the strong two-dimensional character of the paraconductivity above Tc points towards a significant modulation of the pairing interactions along the z direction. We also discuss the peculiar differences between single-band and multi-band superconductors for what concerns the anisotropy of the superconducting-fluctuations effects above and below Tc.
description: Invited paper for a focus issue on Multicomponent Superconductivity on Sust, final version as published, 8 pages + 1 figure
Free Subordination and Belinschi-Nica Semigroup
Creators: name: Arizmendi, Octavio
name: Hasebe, Takahiro
Publisher: name: arXiv
Year: 2014
Subjects: subject: Probability (math.PR)
subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 46L54

description: We realize the Belinschi-Nica semigroup of homomorphisms as a free multiplicative subordination. This realization allows to define more general semigroups of homomorphisms with respect to free multiplicative convolution. For these semigroups we show that a differential equation holds, generalizing the complex Burgers equation. We give examples of free multiplicative subordination and find a relation to the Markov-Krein transform, Boolean stable laws and monotone stable laws. A similar idea works for additive subordination, and in particular we study the free additive subordination associated to the Cauchy distribution and show that it is a homomorphism with respect to monotone, Boolean and free additive convolutions.
description: 21 pages, minor corrections, Complex Analysis and Operator Theory, First online: 16 October 2015