cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Dyck Words, Pattern Avoidance, and Automatic Sequences
Creators: name: Mol, Lucas
name: Rampersad, Narad
name: Shallit, Jeffrey
Publisher: name: arXiv
Year: 2023
Subjects: subject: Discrete Mathematics (cs.DM)
subject: Formal Languages and Automata Theory (cs.FL)
subject: Combinatorics (math.CO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We study various aspects of Dyck words appearing in binary sequences, where $0$ is treated as a left parenthesis and $1$ as a right parenthesis. We show that binary words that are $7/3$-power-free have bounded nesting level, but this no longer holds for larger repetition exponents. We give an explicit characterization of the factors of the Thue-Morse word that are Dyck, and show how to count them. We also prove tight upper and lower bounds on $f(n)$, the number of Dyck factors of Thue-Morse of length $2n$.
description: Full version of a paper appearing in the conference proceedings of WORDS 2023
title: Erklärungen und Abhängigkeitsverhältnisse: Eine Kartierung
Creators: name: van Riel, Raphael
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2021
Subjects: subject: 300
subject: 100

description: In diesem Beitrag wird in zentrale Aspekte der philosophischen Erklärungsdebatte eingeführt. Dabei werden vier Schwerpunkte gesetzt: Erstens wird eine verbreitete Theorie von sogenanntem explanatorischen Wissen vorgestellt. Zweitens werden zwei Schwierigkeiten, mit denen sich eine solche Theorie konfrontiert sieht, diskutiert. Im Anschluss werden zwei unterschiedliche Perspektiven voneinander unterschieden, die bezüglich des Phänomenbereichs eingenommen werden können, und von denen es abhängt, ob die benannten Schwierigkeiten tatsächlich Probleme verursachen. Schließlich werden einige Überlegungen zur Relevanz beider Forschungsperspektiven angestellt.
description: In this paper, I introduce some core tenets of the philosophical explanation debate. I will focus on four aspects. First, I will introduce a common theory of explanation, which ties explanation to conceptions of dependence, such as causation. Second, I will discuss two problems of theories of this sort, which are due to the fact that conceptions of dependence play such a prominent role in these theories. I will then turn to a distinction between two perspectives on explanation, which come with two different types of commitments, only one of which gives rise to the problems previously identified. Finally, I will turn to some considerations about the relevance of both perspectives for our understanding of explanation.
description: UNIKATE: Berichte aus Forschung und Lehre, no. 56"Junge Wilde" - Die nächste Generation, p. 84
Anomalously high supercurrent density in a two-dimensional topological material
Creators: name: Zhang, Qi
name: Hossain, Md Shafayat
name: Casas, Brian
name: Zheng, Wenkai
name: Cheng, Zi-Jia
name: Lai, Zhuangchai
name: Tu, Yi-Hsin
name: Chang, Guoqing
name: Yao, Yao
name: Li, Siyuan
name: Jiang, Yu-Xiao
name: Mardanya, Sougata
name: Chang, Tay-Rong
name: You, Jing-Yang
name: Feng, Yuan-Ping
name: Cheng, Guangming
name: Yin, Jia-Xin
name: Shumiya, Nana
name: Cochran, Tyler A.
name: Yang, Xian P.
name: Litskevich, Maksim
name: Yao, Nan
name: Watanabe, Kenji
name: Taniguchi, Takashi
name: Zhang, Hua
name: Balicas, Luis
name: Hasan, M. Zahid
Publisher: name: arXiv
Year: 2023
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Ongoing advances in superconductors continue to revolutionize technology thanks to the increasingly versatile and robust availability of lossless supercurrent. In particular high supercurrent density can lead to more efficient and compact power transmission lines, high-field magnets, as well as high-performance nanoscale radiation detectors and superconducting spintronics. Here, we report the discovery of an unprecedentedly high superconducting critical current density (17 MA/cm2 at 0 T and 7 MA/cm2 at 8 T) in 1T'-WS2, exceeding those of all reported two-dimensional superconductors to date. 1T'-WS2 features a strongly anisotropic (both in- and out-of-plane) superconducting state that violates the Pauli paramagnetic limit signaling the presence of unconventional superconductivity. Spectroscopic imaging of the vortices further substantiates the anisotropic nature of the superconducting state. More intriguingly, the normal state of 1T'-WS2 carries topological properties. The band structure obtained via angle-resolved photoemission spectroscopy and first-principles calculations points to a Z2 topological invariant. The concomitance of topology and superconductivity in 1T'-WS2 establishes it as a topological superconductor candidate, which is promising for the development of quantum computing technology.
Deep Reinforcement Learning for Traffic Light Control in Intelligent Transportation Systems
Creators: name: Zhu, Ming
name: Liu, Xiao-Yang
name: Borst, Sem
name: Walid, Anwar
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Smart traffic lights in intelligent transportation systems (ITSs) are envisioned to greatly increase traffic efficiency and reduce congestion. Deep reinforcement learning (DRL) is a promising approach to adaptively control traffic lights based on the real-time traffic situation in a road network. However, conventional methods may suffer from poor scalability. In this paper, we investigate deep reinforcement learning to control traffic lights, and both theoretical analysis and numerical experiments show that the intelligent behavior ``greenwave" (i.e., a vehicle will see a progressive cascade of green lights, and not have to brake at any intersection) emerges naturally a grid road network, which is proved to be the optimal policy in an avenue with multiple cross streets. As a first step, we use two DRL algorithms for the traffic light control problems in two scenarios. In a single road intersection, we verify that the deep Q-network (DQN) algorithm delivers a thresholding policy; and in a grid road network, we adopt the deep deterministic policy gradient (DDPG) algorithm. Secondly, numerical experiments show that the DQN algorithm delivers the optimal control, and the DDPG algorithm with passive observations has the capability to produce on its own a high-level intelligent behavior in a grid road network, namely, the ``greenwave" policy emerges. We also verify the ``greenwave" patterns in a $5 \times 10$ grid road network. Thirdly, the ``greenwave" patterns demonstrate that DRL algorithms produce favorable solutions since the ``greenwave" policy shown in experiment results is proved to be optimal in a specified traffic model (an avenue with multiple cross streets). The delivered policies both in a single road intersection and a grid road network demonstrate the scalability of DRL algorithms.
description: 17 pages
Unterlagen Masterarbeit - Erhebung der aktuellen und geplanten Maßnahmen zur Reduzierung der Umwelteinflüsse des Flugverkehrs durch Flugsicherungsorganisationen
Creators: name: Zangerle, David
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 460807
subject: Information visualisation
classificationCode: 410103
subject: Human impacts of climate change and human adaptation

description: Hier sind alle Unterlagen zu meiner Masterarbeit mit dem Titel "Erhebung der aktuellen und geplanten Maßnahmen zur Reduzierung der Umwelteinflüsse des Flugverkehrs durch Flugsicherungsorganisationen" zu finden. In diesem Repository finden Sie sämtliche Materialien, die im Rahmen meiner Forschungsarbeit verwendet wurden. Dazu gehören die Umfrageergebnisse, Analysen, Code und weitere ergänzende Materialien.
title: Künstliche Intelligenz in der Bildung: Wie Sprachtechnologie Lehrende unterstützen kann
Creators: name: Zesch, Torsten
name: Horbac, Andrea
name: Laarmann-Quante, Ronja
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2021
Subjects: subject: 300

description: Am Ende jedes Semesters das gleiche Bild: ein riesiger Stapel Klausuren wartet schon seit Wochen darauf benotet zu werden. Für jede Antwort ein ermutigendes und korrigierendes Feedback zu schreiben, würde noch mehr Zeit kosten. Außerdem kursiert die Klausur im Internet. Für nächstes Jahr müssen dann doch mal neue Aufgaben her.
description: Artificial intelligence, especially methods of natural language process-ing, can be used in educational con-texts in order to support the teaching process. In this article, we focus on three main application types that we are currently working on: we automatically generate exercises for various question types that are hard or tedious to formulate for humans, and assess the difficulty of exercises we created. We automatically score learner answers, be it answers to short answer questions, which are scored based on their content, or longer essays, scored based on lan-guage use and argumentation quality. Finally we give learners feedbackabout their texts, for example by analyzing the spelling errors pro-duced by school children in order to inform them about the orthographic phenomena they still struggle with.
description: UNIKATE: Berichte aus Forschung und Lehre, no. 56"Junge Wilde" - Die nächste Generation, p. 94
Trimmatothelopsis serpentinicola (Acarosporaceae), a rare species from northern California, U.S.A.
Creators: name: Knudsen, Kerry
name: Carlberg, Tom
name: Kocourková, Jana
name: Hodková, Eva
name: Malíček, Jiří
Publisher: name: Zenodo
Year: 2024

description: The new species Trimmatothelopsis serpentinicola, was collected by Tom Carlberg in northern California on weathered peridotite in serpentine shrubland. Catastrophic fire and post fire management devastated the type area and annihilated the type population. The species is currently only known from the holotype. Trimmatothelopsis oreophila is reported from serpentine.
Performance comparison of the two reconstruction methods for stabilizer-based quantum secret sharing
Creators: name: Chiwaki, Shogo
name: Matsumoto, Ryutaroh
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Stabilizer-based quantum secret sharing has two methods to reconstruct a quantum secret: The erasure correcting procedure and the unitary procedure. It is known that the unitary procedure has a smaller circuit width. On the other hand, it is unknown which method has smaller depth and fewer circuit gates. In this paper, it is shown that the unitary procedure has smaller depth and fewer circuit gates when the circuits are designed for quantum secret sharing using $[[5, 1, 3]]$ binary stabilizer codes.
description: 3 pages, 2 figures, 1 table
Auto.gov: Learning-based Governance for Decentralized Finance (DeFi)
Creators: name: Xu, Jiahua
name: Feng, Yebo
name: Perez, Daniel
name: Livshits, Benjamin
Publisher: name: arXiv
Year: 2023
Subjects: subject: Risk Management (q-fin.RM)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Machine Learning (cs.LG)
subject: FOS: Economics and business
subject: FOS: Computer and information sciences

description: Decentralized finance (DeFi) is an integral component of the blockchain ecosystem, enabling a range of financial activities through smart-contract-based protocols. Traditional DeFi governance typically involves manual parameter adjustments by protocol teams or token holder votes, and is thus prone to human bias and financial risks, undermining the system's integrity and security. While existing efforts aim to establish more adaptive parameter adjustment schemes, there remains a need for a governance model that is both more efficient and resilient to significant market manipulations. In this paper, we introduce "Auto$.$gov", a learning-based governance framework that employs a deep Qnetwork (DQN) reinforcement learning (RL) strategy to perform semi-automated, data-driven parameter adjustments. We create a DeFi environment with an encoded action-state space akin to the Aave lending protocol for simulation and testing purposes, where Auto$.$gov has demonstrated the capability to retain funds that would have otherwise been lost to price oracle attacks. In tests with real-world data, Auto$.$gov outperforms the benchmark approaches by at least 14% and the static baseline model by tenfold, in terms of the preset performance metric--protocol profitability. Overall, the comprehensive evaluations confirm that Auto$.$gov is more efficient and effective than traditional governance methods, thereby enhancing the security, profitability, and ultimately, the sustainability of DeFi protocols.
title: Der Streit, Episode 6 - Steinmetz: Vergleichende Soziologie, kritischer Realismus und Reflexivität
Creators: name: Armbruster, André
name: Seyfert, Robert
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2021
Subjects: subject: Podcast
subject: Soziologie
subject: Review
subject: Besprechungen
subject: 300

description: Der Streit – Podcast über neue soziologische Literatur. Mit Robert und André Armbruster. Online First im Podcast: Wir streiten uns um George Steinmetz‘ „Vergleichende Soziologie, kritischer Realismus und Reflexivität“, ganz frisch aus der KZfSS. Hält Steinmetz sein Versprechen einer postpositivistischen Soziologie des Vergleichs? Und hilft der Kritische Realismus dabei? All dies und mehr in der neuen Episode des Streits. Musik: zapsplat.com
description: Der Streit - Über neue soziologische Literatur: Podcast
Measures of association between algebraic varieties, II: self-correspondences
Creators: name: Lazarsfeld, Robert
name: Martin, Olivier
Publisher: name: arXiv
Year: 2023
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14E05, 14E07, 14E20, 14H51, 14C25, 14K12

description: Following a suggestion of Jordan Ellenberg, we study measures of complexity for self-correspondences of some classes of varieties. We also answer a question of Rhyd concerning curves sitting in the square of a very general hyperelliptic curve.
description: This article is dedicated to Claire Voisin on the occasion of her birthday. 12 pages
title: A sieve for finding prime numbers in a range
Creators: name: Nandally, Yasseen
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2021
Subjects: subject: prime numbers
subject: sieve
subject: in a range
subject: 510

description: What is the next prime number? How to identify if an integer is prime or not? Suchquestions or the topic prime number in general, have always been a puzzle. Thestudy of prime number trace its route back to around 300 BC by the GreekMathematician Euclid. Since then, the analysis of prime numbers and its theoremshave known an increase in the field of number theory. Based on properties ofprimes, namely unique factorization, infinitude among others, several methodologieshave been derived to find the next prime number or to answer other questions.Those methods include abstract algebra, computational methods etc. . Even fordefining the properties, there are multiple theorems that have been discovered. Thecomputational method used in this thesis is a sieving method. The idea is to findprime numbers within a given range where only integers lying in this range are ofinterest. Apropos recognizing the next large prime number, performance andstorage have always been the subject of debate when it comes to implementation ofan algorithm. The procedure explained in this document is an attempt to improveboth performance and storage if it was to be implemented. For a betterperformance, this is achieved by parallelizing computation as the formulae areindependent from each other and concerning storage, variables are used to avoidcopying large data every time.
MAGO$\,$2.0: Electromagnetic Cavities as Mechanical Bars for Gravitational Waves
Creators: name: Berlin, Asher
name: Blas, Diego
name: D'Agnolo, Raffaele Tito
name: Ellis, Sebastian A. R.
name: Harnik, Roni
name: Kahn, Yonatan
name: Schütte-Engel, Jan
name: Wentzel, Michael
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Superconducting cavities can operate analogously to Weber bar detectors of gravitational waves, converting mechanical to electromagnetic energy. The significantly reduced electromagnetic noise results in increased sensitivity to high-frequency signals well outside the bandwidth of the lowest mechanical resonance. In this work, we revisit such signals of gravitational waves and demonstrate that a setup similar to the existing "MAGO" prototype, operating in a scanning or broadband manner, could have sensitivity to strains of $\sim 10^{-22} - 10^{-18}$ for frequencies of $\sim 10 \ \text{kHz} - 1 \ \text{GHz}$.
description: 23 pages + 11 pages of appendices
Maximal real varieties from moduli constructions
Creators: name: Fu, Lie
Publisher: name: arXiv
Year: 2023
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14P25, 14H60, 14J60, 14C05, 14C15

description: For a complex manifold equipped with an anti-holomorphic involution, which is referred to as a real variety, the Smith-Thom inequality states that the total $\mathbb{F}_2$-Betti number of the real locus is not greater than the total $\mathbb{F}_2$-Betti number of the ambient complex manifold. A real variety is called maximal if the equality holds. In this paper, we present a series of new constructions of maximal real varieties by exploring moduli spaces of certain objects on a maximal real variety. Our results establish the maximality of the following real varieties:
 - Moduli spaces of stable vector bundles of coprime rank and degree over a maximal smooth projective real curve (known as Brugallé-Schaffhauser's theorem, with a short new proof presented in this work); the same result holds for moduli spaces of stable parabolic vector bundles.
 - Moduli spaces of stable Higgs bundles of coprime rank and degree over a maximal smooth projective real curve, providing maximal hyper-Kähler examples.
 - If a real variety has non-empty real locus and maximal Hilbert square, then the variety itself and its Hilbert cube are maximal. This is always the case for maximal real smooth cubic threefolds, but never the case for maximal real smooth cubic fourfolds.
 - Punctual Hilbert schemes on a maximal real projective surface with vanishing first $\mathbb{F}_2$-Betti number and connected real locus, such as $\mathbb{R}$-rational maximal real surfaces and some generalized Dolgachev surfaces.
 - Moduli spaces of stable sheaves on the real projective plane, or more generally, on an $\mathbb{R}$-rational maximal Poisson surface.
 We also observe that maximality is a motivic property when interpreted as equivariant formality. Furthermore, any smooth projective real variety motivated by maximal ones is also maximal.
description: V2: various improvements. Comments welcome!
Hierarchical memories: Simulating quantum LDPC codes with local gates
Creators: name: Pattison, Christopher A.
name: Krishna, Anirudh
name: Preskill, John
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Constant-rate low-density parity-check (LDPC) codes are promising candidates for constructing efficient fault-tolerant quantum memories. However, if physical gates are subject to geometric-locality constraints, it becomes challenging to realize these codes. In this paper, we construct a new family of $[[N,K,D]]$ codes, referred to as hierarchical codes, that encode a number of logical qubits $K = Ω(N/\log(N)^2)$. The N-th element of this code family is obtained by concatenating a constant-rate quantum LDPC code with a surface code; nearest-neighbor gates in two dimensions are sufficient to implement the corresponding syndrome-extraction circuit and achieve a threshold. Below threshold the logical failure rate vanishes superpolynomially as a function of the distance $D(N)$. We present a bilayer architecture for implementing the syndrome-extraction circuit, and estimate the logical failure rate for this architecture. Under conservative assumptions, we find that the hierarchical code outperforms the basic encoding where all logical qubits are encoded in the surface code.
description: 70 pages. Tl;dr in section 1
title: Public transport as a common pool resource - sustainable configuration options in the case of Glasgow
Creators: name: Birrong, Sylvia
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2021
Subjects: subject: public transport
subject: common pool resources
subject: deregulation
subject: Glasgow
subject: 380

description: With the combination of a growing population, expanding globalisation and increasing economic activity, the world is facing numerous challenges including climate change, social inequality and overuse of resources and space. One of the sectors that creates problems and therefore holds the opportunity for improvement is the mobility sector. Private vehicle-based transport causes the overuse of (road) space, increased emission of greenhouse gases, congestion, and health issues. However, mobility is essential for access to health care, education, employment, social interaction, and leisure time activities, which are valuable assets requiring equal access opportunities unattainable with purely car-based transportation. Subsequently, public transport has an important role to play and could therefore be viewed as a public good, or a “Common Pool Resource (CPR)” (Elinor Ostrom) instead of a service. Users cannot be excluded from the CPR, and its overuse leads to a constraint of its functioning. Therefore, the questions are raised of who should be providing this public good, and how? In Glasgow, public transport is provided by private companies in a deregulated market environment. Citizens and experts criticise the public transport in the city as it is expensive and not accessible for everyone; neither does it connect every neighbourhood to health care, employment, and education. Glasgow has high rates of poverty, inequality, and emissions from extensive car use. The new Scottish Transport Bill provides powers to local Councils for reregulating their public transport or putting it back into public ownership. Elinor Ostrom suggests letting communities own and organise a CPR. Re-regulation, public ownership, and community ownership, as well as mixed governance forms will be examined in this paper as solutions to Glasgow’s public transport issues. The combination of scientific literature and field research in Glasgow will serve as a basis for that discussion.
Modelling self-consistently beyond General Relativity
Creators: name: Cayuso, Ramiro
name: Figueras, Pau
name: França, Tiago
name: Lehner, Luis
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The majority of extensions to General Relativity display mathematical pathologies (higher derivatives, character change in equations that can be classified within PDE theory, and even unclassifiable ones) that cause severe difficulties to study them, especially in dynamical regimes. We present here an approach that enables their consistent treatment and extraction of physical consequences. We illustrate this method in the context of single and merging black holes in a highly challenging beyond GR theory.
description: 10 pages, 8 figures
title: Rückführung kostbarer Wertstoffe durch Entölen von Spänen
Creators: name: Pähler, Norbert
name: Biedermann, Holger
name: Meynerts, Udo
name: Reschke, Carsten
name: Schubert, Daniel
name: Erich, Egon
name: Deike, Rüdiger
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2021
Subjects: subject: Recycling
subject: 624

description: Metallische Bearbeitungsspäne sind in der Regel mit Kühlschmierstoffen verunreinigt und lassen sich schlecht in den Wertstoffkreislauf zurückführen. Ein innovativer und ressourcenschonender Entölungsprozess erlaubt es nun, teure Metalle, die als Legierungselemente enthalten sind, zurückzugewinnen. Dabei werden die Späne in einem mehrstufigen Verfahren gewaschen und anschließend getrocknet.
Doubly optimal parallel wire cutting without ancilla qubits
Creators: name: Harada, Hiroyuki
name: Wada, Kaito
name: Yamamoto, Naoki
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A restriction in the quality and quantity of available qubits presents a substantial obstacle to the application of near-term and early fault-tolerant quantum computers in practical tasks. To confront this challenge, some techniques for effectively augmenting the system size through classical processing have been proposed; one promising approach is quantum circuit cutting. The main idea of quantum circuit cutting is to decompose an original circuit into smaller sub-circuits and combine outputs from these sub-circuits to recover the original output. Although this approach enables us to simulate larger quantum circuits beyond physically available circuits, it needs classical overheads quantified by the two metrics: the sampling overhead in the number of measurements to reconstruct the original output, and the number of channels in the decomposition. Thus, it is crucial to devise a decomposition method that minimizes both of these metrics, thereby reducing the overall execution time. This paper studies the problem of decomposing the parallel $n$-qubit identity channel, i.e., $n$-parallel wire cutting, into a set of local operations and classical communication; then we give an optimal wire-cutting method comprised of channels based on mutually unbiased bases, that achieves minimal overheads in both the sampling overhead and the number of channels, without ancilla qubits. This is in stark contrast to the existing method that achieves the optimal sampling overhead yet with ancilla qubits. Moreover, we derive a tight lower bound of the number of channels in parallel wire cutting without ancilla systems and show that only our method achieves this lower bound among the existing methods. Notably, our method shows an exponential improvement in the number of channels, compared to the aforementioned ancilla-assisted method that achieves optimal sampling overhead.
description: Substantially updated version. 33 pages, 10 figures
Supplementary document for Weakly supervised identification of microscopic human breast cancer-related optical signatures from normal-appearing breast tissue - 6146357.pdf
Creators: name: Shi, Jindou
name: Tu, Haohua
name: Park, Jaena
name: Marjanovic, Marina
name: Higham, Anna
name: Luckey, Natasha
name: Cradock, Kimberly
name: Liu, George
name: Boppart, Stephen
Publisher: name: Optica Publishing Group
Year: 2025
Subjects: Uncategorized

description: All supplementary notes, figures, and tables mentioned in the manuscript
Generalizations of quasielliptic curves
Creators: name: Hilario, Cesar
name: Schröer, Stefan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14G17, 14L15, 14L30, 14H45, 20M25, 20J06, 14D06

description: We generalize the notion of quasielliptic curves, which have infinitesimal symmetries and exist only in characteristic two and three, to a remarkable hierarchy of regular curves having infinitesimal symmetries, defined in all characteristics and having higher genera. This relies on the study of certain infinitesimal group schemes acting on the affine line and certain compactifications. The group schemes are defined in terms of invertible additive polynomials over rings with nilpotent elements, and the compactification is constructed with the theory of numerical semigroups. The existence of regular twisted forms relies on Brion's recent theory of equivariant normalization. Furthermore, extending results of Serre from the realm of group cohomology, we describe non-abelian cohomology for semidirect products, to compute in special cases the collection of all twisted forms.
description: 31 pages
Extensions of curves with high degree with respect to the genus
Creators: name: Ciliberto, Ciro
name: Dedieu, Thomas
Publisher: name: arXiv
Year: 2023
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: We classify linearly normal surfaces $S \subset \mathbf{P}^{r+1}$ of degree $d$ such that $4g-4 \leq d \leq 4g+4$, where $g>1$ is the sectional genus (it is a classical result that for larger $d$ there are only cones). We apply this to the study of the extension theory of pluricanonical curves and genus $3$ curves, whenever they verify Property $N_2$, using and slightly expanding the theory of integration of ribbons of the authors and E.~Sernesi. We compute the corank of the relevant Gaussian maps, and we show that all ribbons over such curves are integrable, and thus there exists a universal extension.
 We carry out a similar program for linearly normal hyperelliptic curves of degree $d\geq 2g+3$. We classify surfaces having such a curve $C$ as a hyperplane section, compute the corank of the relevant Gaussian maps, and prove that all ribbons over $C$ are integrable if and only if $d=2g+3$. In the latter case we obtain the existence of a universal extension.
description: v2: various complements with respect to v1; v3: correction in the statement of Hartshorne's Theorem 2.5: v4: final version
title: Zum Lernen verlocken: Erfahrungen mit einem online-gestützten Planspiel zur Reflexion über Rechtschreibung und Grammatik in der Sekundarstufe I
Creators: name: Beißwenger, Michael
name: Meyer, Lena
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2020
Subjects: subject: Sprachdidaktik
subject: Rechtschreibung
subject: Orthographie
subject: Mediendidaktik
subject: Gamification
subject: Deutschunterricht
subject: 400
subject: 430

description: In diesem Beitrag stellen wir das Planspiel ORTHO & GRAF vor, das darauf zielt, Lernende der Sekundarstufe I durch ein detailliert ausgearbeitetes Spielszenario dazu anzuregen, sich eigenaktiv und selbstgesteuert, anwendungs- und problembezogen, kooperativ und diskursiv mit ausgewählten Bereichen der deutschen Rechtschreibung und den für ihr Verständnis relevanten grammatischen Regularitäten auseinanderzusetzen. Das Konzept ist inspiriert von Ideen der ‚Gamification‘ und des ‚Game-based Learning‘ und setzt auf den Einsatz von Spielelementen im Lernkontext. Wir stellen das didaktische Konzept und die für seine Durchführung benötigten Unterrichtsmaterialien vor und berichten von den Erfahrungen mit dem Einsatz des Planspiels in der Klassenstufe 7 eines Gymnasiums. Vor diesem Hintergrund diskutieren wir, ob und unter welchen Bedingungen ‚Gamification‘ dazu beitragen kann, Lernende für die eigentständige, problem- und reflexionsorientierte Auseinandersetzung mit einem Lerngegenstand im Bereich des Deutschunterrichts zu aktivieren.
Silencing the classroom: Ocean Hill-Brownsville and the production of the history of education
Creators: name: Santana, Erin R.
Publisher: name: No Publisher Supplied
Year: 2024

description: Education policymakers and stakeholders regularly draw upon the past to justify their visions for the future of public schools, yet scholars have only begun to examine the formation and function of these historical narratives. Using New York City’s short-lived Ocean Hill-Brownsville (OHB) school district (1967-1970) – one of many late-1960s experiments in “community control” of schools – as a case study, this dissertation brings the tools of public history and memory studies to bear on the history and sociology of urban education to ask how various education stakeholders construct narratives about the history of urban education and deploy these narratives in education policy debates. Based on a mixed methods approach applying critical discourse analysis to archival and ethnographic research, I demonstrate that the OHB district implemented a range of “dignity-affirming” practices that continue to inspire activists today. Such practices ought to be understood as in a lineage with ongoing demands for: 1) community schools, 2) culturally responsive education, 3) bilingual education, and 4) Afrocentric independent education. Instead, they remain distorted or silenced in dominant historical narratives that portray the district as an educational failure pervaded by anti-White and anti-Jewish racism. By employing Michel-Rolph Trouillot’s (1995) seminal theory of “silencing” the past alongside the insights of philosophers of racial, feminist, and postcolonial epistemology, I argue that these dominant narratives are manifestations of the “ignorance” and “amnesia” that are required to sustain White supremacy, patriarchy, capitalism, and imperialism. However, I also point to multiple insurgent narratives that highlight the educational visions and legacies of community control, thereby resisting dominant epistemologies and hierarchies of power. Such narratives remain central to ongoing fights for educational justice and self-determination in Brownsville and beyond.
title: Der Streit, Episode 7 - Wagner-Pacifici: What is an Event?
Creators: name: Armbruster, André
name: Seyfert, Robert
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2021
Subjects: subject: Podcast
subject: Soziologie
subject: Review
subject: Besprechungen
subject: 300

description: Der Streit – Podcast über neue soziologische Literatur. Mit Robert und André Armbruster. Die französische Revolution, 9/11, Courbets „L’Origine du monde“ – um all das geht es in „What is an Event?“ von Robin Wagner-Pacifici (Chicago UP, 2017). Wir bleiben aber doch ratlos: Was lernt man in dem Buch? Woraus entstehen Events? Und vor allem: Was ist denn nun ein Event? Musik: zapsplat.com
description: Der Streit - Über neue soziologische Literatur: Podcast
A critical non-homogeneous heat equation with weighted source
Creators: name: Iagar, Razvan Gabriel
name: Sánchez, Ariel
Publisher: name: arXiv
Year: 2024
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: Some qualitative properties of radially symmetric solutions to the non-homogeneous heat equation with critical density and weighted source $$ |x|^{-2}\partial_tu=Δu+|x|^σu^p, \quad (x,t)\in\mathbb{R}^N\times(0,T), $$ are obtained, in the range of exponents $p>1$, $σ\ge-2$. More precisely, we establish conditions fulfilled by the initial data in order for the solutions to either blow-up in finite time or decay to zero as $t\to\infty$ and, in the latter case, we also deduce decay rates and large time behavior. In the limiting case $σ=-2$ we prove the existence of non-trivial, non-negative solutions, in stark contrast to the homogeneous case. A transformation to a generalized Fisher-KPP equation is derived and employed in order to deduce these properties.
From pain to poetry: an analysis on poetry written by victims of sexual violence
Creators: name: Islam, Rodhinee
name: Van De Walle, Stephanie
name: Vandeviver, Christophe
Publisher: name: Zenodo
Year: 2024

description: An analysis done on poetry written by victims of sexual violence, done through a thematic analysis and topic model. As a way to find new perspectives outside of the dominant discourse, to include unregistered and underexposed individuals. Due to the benefits of expressive arts (creative writing: poetry), one is able to voice what normally stays unvoiced. This creates new creative forms of data for science. I will explore the ways in which poetry can allow for a broader understanding of the topic.
Witt groups of Severi-Brauer varieties and of function fields of conics
Creators: name: Quéguiner-Mathieu, Anne
name: Tignol, Jean-Pierre
Publisher: name: arXiv
Year: 2023
Subjects: subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics
subject: 19G12, 11E81, 14H05

description: The Witt group of skew hermitian forms over a division algebra $D$ with symplectic involution is shown to be canonically isomorphic to the Witt group of symmetric bilinear forms over the Severi-Brauer variety of $D$ with values in a suitable line bundle. In the special case where $D$ is a quaternion algebra we extend previous work by Pfister and by Parimala on the Witt group of conics to set up two five-terms exact sequences relating the Witt groups of hermitian or skew-hermitian forms over $D$ with the Witt groups of the center, of the function field of the Severi-Brauer conic of $D$, and of the residue fields at each closed point of the conic.
Ngô support theorem and polarizability of quasi-projective commutative group schemes
Creators: name: Ancona, Giuseppe
name: Fratila, Dragos
Publisher: name: arXiv
Year: 2023
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: We prove that any commutative group scheme over an arbitrary base scheme of finite type over a field with connected fibers and admitting a relatively ample line bundle is polarizable in the sense of Ngô. This extends the applicability of Ngô's support theorem to new cases, for example to Lagrangian fibrations with integral fibers and has consequences to the construction of algebraic classes.
description: comments welcome
Normal forms for quasi-elliptic Enriques surfaces and applications
Creators: name: Katsura, Toshiyuki
name: Schütt, Matthias
Publisher: name: arXiv
Year: 2023
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14J28, 14J27

description: We work out normal forms for quasi-elliptic Enriques surfaces and give several applications. These include torsors and numerically trivial automorphisms, but our main application is the completion of the classification of Enriques surfaces with finite automorphism groups started by Kondo, Nikulin, Martin and Katsura-Kondo-Martin.
description: 32 pages; (epi)journal version
Efficient generation of geodesic random fields in finite elements with application to shell buckling
Creators: name: Van Den Broek, Sander
name: Rolfes, Raimund
name: Jansen, Eelco
Publisher: name: Amsterdam [u.a.] : Elsevier
Year: 2022
Subjects: subject: Geodesic length
subject: Heat method
subject: fea
subject: random field
subject: Dewey Decimal Classification::600 | Technik::690 | Hausbau, Bauhandwerk

description: Structures contain inherent deviations from idealized geometry and material properties. Quantifying the effects of such random variations is of interest when determining the reliability and robustness of a structure. Generating ﬁelds that follow complex shapes is not trivial. Generating random ﬁelds on simple shapes such as a cylinder can be done using series-expansion methods or analytically computed distances as input for a decomposition approach. Generating geodesic random ﬁelds on a mesh representing complex geometric shapes using these approaches is very complex or not possible. This paper presents a generalized approach to generating geodesic random ﬁelds representing variations in a ﬁnite element setting. Geodesic distances represent the shortest path between points within a volume or surface. Computing geodesic distances of structural points is achieved by solving the heat equation using normalized heat gradients originating from every node within the structure. Any element (bar, beam, shell, or solid) can be used as long as it can solve potential ﬂow problems in the ﬁnite element program. Variations of the approach are discussed to generate ﬁelds with deﬁned similarities or ﬁelds that show asymmetric behavior. A numerical example of a gyroid structure demonstrates the effect of using geodesic distances in ﬁeld generation compared to Euclidean distances. An anisotropic cylinder with varying Young’s modulus and thickness is taken from literature to verify the implementation. Variations of the approach are analyzed using a composite cylinder in which ﬁber angles are varied. Although the focus of this paper is thin-walled structures, the approach works for all types of ﬁnite element structures and elements.
A construction of the polylogarithm motive
Creators: name: Dupont, Clément
name: Fresán, Javier
Publisher: name: arXiv
Year: 2023
Subjects: subject: Algebraic Geometry (math.AG)
subject: K-Theory and Homology (math.KT)
subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: Classical polylogarithms give rise to a variation of mixed Hodge-Tate structures on the punctured projective line $S=\mathbb{P}^1\setminus \{0, 1, \infty\}$, which is an extension of the symmetric power of the Kummer variation by a trivial variation. By results of Beilinson-Deligne, Huber-Wildeshaus, and Ayoub, this polylogarithm variation has a lift to the category of mixed Tate motives over $S$, whose existence is proved by computing the corresponding space of extensions in both the motivic and the Hodge settings. In this paper, we construct the polylogarithm motive as an explicit relative cohomology motive, namely that of the complement of the hypersurface $\{1-zt_1\cdots t_n=0\}$ in affine space $\mathbb{A}^n_S$ relative to the union of the hyperplanes $\{t_i=0\}$ and $\{t_i=1\}$.
description: 32 pages
Correspondence between Pestov and Weitzenböck identities
Creators: name: Cekić, Mihajlo
name: Lefeuvre, Thibault
name: Moroianu, Andrei
name: Semmelmann, Uwe
Publisher: name: arXiv
Year: 2023
Subjects: subject: Differential Geometry (math.DG)
subject: Analysis of PDEs (math.AP)
subject: Dynamical Systems (math.DS)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 53B20, 58J60, 53C65, 35R30, 37A25

description: The aim of this note is to establish the correspondence between the twisted localized Pestov identity on the unit tangent bundle of a Riemannian manifold and the Weitzenböck identity for twisted symmetric tensors on the manifold.
description: 22 pages. v2: added some references
EHTIYOT CHORALARI VA ULARNI TANLASHDA HISOBGA OLINADIGAN HOLATLAR.
Creators: name: Bahodirov Oʻtkirxon Baxriddinovich
Publisher: name: Zenodo
Year: 2024

description: O‘zbekiston Respublikasi Jinoyat-protsessual kodeksida ehtiyot choralari boʻyicha amaliyotda qoʻllanilishi mumkin boʻlgan holatlar koʻrsatilgan boʻlsa-da, ularning yuridik taʼrifi berilmagan. Bu atama asosan davlat hokimiyati organlari tomonidan qoʻllanadigan ehtiyot chora sifatida qabul qilinadi, ammo aniq normativ ta’rifga ega emas.
Proving Properties of $φ$-Representations with the Walnut Theorem-Prover
Creators: name: Shallit, Jeffrey
Publisher: name: arXiv
Year: 2023
Subjects: subject: Number Theory (math.NT)
subject: Discrete Mathematics (cs.DM)
subject: Formal Languages and Automata Theory (cs.FL)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We revisit a classic theorem of Frougny and Sakarovitch concerning automata for $φ$-representations, and show how to obtain it in a different and more computationally direct way. Using it, we can find simple, induction-free proofs of existing results in the literature about these representations, in a uniform and straightforward manner. In particular, we can easily and "automatically'' recover many of the results of recent papers of Dekking and Van Loon. We also obtain a number of new results on $φ$-representations.
Investigations of Landfill Leachate Treatment Using Membrane Bioreactor in Different Configurations
Creators: name: Lindamulle Mudiyansele, Lahiru Kosala Bandara
Publisher: name: RMIT University
Year: 2024
Subjects: classificationCode: 400508
subject: Infrastructure engineering and asset management

description: This study investigates the treatment of landfill leachate, a hazardous liquid byproduct of municipal solid waste (MSW) landfills, with a focus on assessing the performance of a membrane bioreactor (MBR). The research aims to answer key research questions related to leachate characteristics, optimal MBR design, efficient contaminant removal, and the development of a mathematical model t simulate and optimize MBR performance. Leachate samples from various landfill sites in Sri Lanka were characterized, and an Anoxic-Aerobic MBR configuration with a Sludge Retention Time (SRT) of 60 days and a Hydraulic Retention Time (HRT) of 24 hours was identified as the optimal operating condition. The study conducted a comprehensive laboratory-scale model experiment, analyzing samples over 351 days and evaluating key parameters such as COD, BOD5, MLSS, TN, membrane resistance, and trans-membrane pressure. The developed mathematical model based on the Activated Sludge Model 1 (ASM1) accurately predicted the MBR's long-term performance, considering variables such as COD, MLSS, TN, total membrane resistance, and trans-membrane pressure. The study emphasizes the need for further research to improve the modeling accuracy. In summary, this research provides insights into landfill leachate treatment, showcasing the effectiveness of an MBR and the potential for future advancements in modeling accuracy and treatment optimization.
String Diagrams for Premonoidal Categories
Creators: name: Román, Mario
name: Sobociński, Paweł
Publisher: name: arXiv
Year: 2023
Subjects: subject: Category Theory (math.CT)
subject: FOS: Mathematics
subject: 18M30

description: Premonoidal categories are monoidal categories without the interchange law while effectful categories are premonoidal categories with a chosen monoidal subcategory of interchanging morphisms. In the same sense that string diagrams, pioneered by Joyal and Street, are an internal language for monoidal categories, we show that string diagrams with an added "runtime object", pioneered by Alan Jeffrey, are an internal language for effectful categories and can be used as string diagrams for effectful, premonoidal, and Freyd categories.
Upper bound for the grand canonical free energy of the Bose gas in the Gross-Pitaevskii limit
Creators: name: Boccato, Chiara
name: Deuchert, Andreas
name: Stocker, David
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences
subject: 82B10, 81V73, 81V70

description: We consider a homogeneous Bose gas in the Gross-Pitaevskii limit at temperatures that are comparable to the critical temperature for Bose-Einstein condensation in the ideal gas. Our main result is an upper bound for the grand canonical free energy in terms of two new contributions: (a) the free energy of the interacting condensate is given in terms of an effective theory describing its particle number fluctuations, (b) the free energy of the thermally excited particles equals that of a temperature-dependent Bogoliubov Hamiltonian.
description: 41 pages
Supplementary document for Formation of NV centers in diamond by femtosecond laser single pulse - 6146815.pdf
Creators: name: Shimotsuma, Yasuhiko
name: Yanoshita, Ryusei
name: Fujiwara, Masanori
name: Mizuochi, Norikazu
name: Uemoto, Mitsuharu
name: Shimizu, Masahiro
name: Miura, Kiyotaka
name: Kinouchi, Kohei
Publisher: name: Optica Publishing Group
Year: 2025
Subjects: Uncategorized

description: S1. Sample for the X-ray microdiffraction measurements