cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A Katznelson-Tzafriri theorem for analytic Besov functions of operators
Creators: name: Batty, Charles
name: Seifert, David
Publisher: name: arXiv
Year: 2022
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: Let $T$ be a power-bounded operator on a Banach space $X$, $\mathcal{A}$ be a Banach algebra of bounded holomorphic functions on the unit disc $\mathbb{D}$, and assume that there is a bounded functional calculus for the operator $T$, so there is a bounded algebra homomorphism mapping functions $f \in \mathcal{A}$ to bounded operators $f(T)$ on $X$. Theorems of Katznelson-Tzafriri type establish that $\lim_{n\to\infty} \|T^n f(T)\| = 0$ for functions $f \in \mathcal{A}$ whose boundary functions vanish on the unitary spectrum $σ(T)\cap \mathbb{T}$ of $T$, or sometimes satisfy a stronger assumption of spectral synthesis. We consider the case when $\mathcal{A}$ is the Banach algebra $\mathcal{B}(\mathbb{D})$ of analytic Besov functions on $\mathbb{D}$. We prove a Katznelson-Tzafriri theorem for the $\mathcal{B}(\mathbb{D})$-calculus which extends several previous results.
description: To appear in Journal of Operator Theory
“Idealists and capitalists”: ownership attitudes and preferences in genomic citizen science
Creators: name: Guerrini, Christi J.
name: Contreras, Jorge L.
name: Brooks, Whitney Bash
name: Canfield, Isabel
name: Trejo, Meredith
name: McGuire, Amy L.
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Medicine
subject: Biotechnology
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Cancer
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: The perspectives of genomic citizen scientists on ownership of research outputs are not well understood, yet they are useful for identifying alignment of participant expectations and project practices and can help guide efforts to develop innovative tools and strategies for managing ownership claims. Here, we report findings from 52 interviews conducted in 2018 and 2019 to understand genomic citizen science stakeholders’ conceptualizations of, experiences with, and preferences for ownership of research outputs. Interviewees identified four approaches for recognizing genomic citizen scientists’ ownership and related credit interests in research outputs: shared governance via commons models; fractional ownership of benefits; full and creative attribution; and offensive and defensive patenting. Interviewees also agreed that the model selected by any project should at least maximize access to research outputs and, as appropriate and to the extent possible, broadly distribute rights of control and entitlements to research benefits.
[ARTICLE] Gamma Derivatives for the Upgraded Mass-Spring Oscillatory System (Canadian Journal of Mathematics Research / 2023) - GAMMA TRIGONOMETRY
Creators: name: Teia, Luis
Publisher: name: figshare
Year: 2023
Subjects: Dynamics, vibration and vibration control
Mechanical engineering not elsewhere classified
Electrical circuits and systems
Electrical engineering not elsewhere classified
Dynamical systems in applications
Applied mathematics not elsewhere classified
Complex systems
Mathematical physics not elsewhere classified

description: ABSTRACT Derivatives in trigonometry have always been defined in orthogonal contexts (i.e., where the y-axis is set perpendicular to the x-axis). Within the context of trigonometric, the present work expands the concept of derivative (operating by the principle of 90 degrees phase shift when applicable to sine and cosine functions) to the realm where the y-axis is at a variable angle γ to the x-axis (i.e., non-orthogonal systems). This gives rise to the concept of the gamma derivative ― which expands the classical derivative to impart phase shifts of γ degrees. Hence, the ordinary derivative (with respect to α) or d/dα is a particular case of the more general gamma derivative or dγ/dγα. The formula for the nth gamma derivative of the extended sine and cosine functions is defined. For applied mathematics, the gamma derivatives of the extended sine function sin*(α,γ) and cosine function cos*(α,γ) determine the extended governing equation of the energy-coupled mass-spring oscillatory system, and by extended analogy that of the energy-coupled electrical LC (Inductance-Capacitance) circuit.
A revised instrument for the assessment of empathy and Theory of Mind in adolescents: Introducing the EmpaToM-Y
Creators: name: Breil, Christina
name: Kanske, Philipp
name: Pittig, Roxana
name: Böckler, Anne
Publisher: name: New York, NY : Springer
Year: 2021
Subjects: subject: Adolescence
subject: Development
subject: Empathy
subject: Mentalizing
subject: Social cognition
subject: Social understanding
subject: Theory of mind
subject: Dewey Decimal Classification::100 | Philosophie::150 | Psychologie

description: Empathy and Theory of Mind (ToM) are two core components of social understanding. The EmpaToM is a validated social video task that allows for independent manipulation and assessment of the two capacities. First applications revealed that empathy and ToM are dissociable constructs on a neuronal as well as on a behavioral level. As the EmpaToM has been designed for the assessment of social understanding in adults, it has a high degree of complexity and comprises topics that are inadequate for minors. For this reason, we designed a new version of the EmpaToM that is especially suited to measure empathy and ToM in youths. In experiment 1, we successfully validated the EmpaToM-Y on the original EmpaToM in an adult sample (N = 61), revealing a similar pattern of results across tasks and strong correlations of all constructs. As intended, the performance measure for ToM and the control condition of the EmpaToM-Y showed reduced difficulty. In experiment 2, we tested the feasibility of the EmpaToM-Y in a group of teenagers (N = 36). Results indicate a reliable empathy induction and higher demands of ToM questions for adolescents. We provide a promising task for future research targeting inter-individual variability of socio-cognitive and socio-affective capacities as well as their precursors and outcomes in healthy minors and clinical populations.
Chaos, Phase Transitions and Curvature Invariants of (rotating, warped, massive) BTZ Black Holes
Creators: name: Ghodrati, Mahdis
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Combining several results from the previous works of the author, three main subtleties will be clarified here. First, similar to the rotating BTZ black holes, we show how for the warped BTZ black holes, the consideration of the effective temperatures could solve the seemingly unsaturation issue of the chaos bound. Second, comparing the Hawking-Page phase diagrams of BTZ and warped BTZ black holes in the topologically massive gravity and new massive gravity theories, we show how the characteristics of the action would specify the behaviors of the chaos modes, and there we emphasize the importance of using the local and "physical" thermodynamical ensembles for studying the boundary chaos modes in warped CFTs and also the connections with the bulk reconstruction. Third, we propose that the boundary modular scrambling modes which saturate the modular chaos bound are related to the curvature invariants in the geometrical side.
description: Contribution to the proceedings of 17th Italy-Korea Symposium on Relativistic Astrophysics
Szenario-basierte Planung eines semantischen Digitalisierungsvorhabens in der digitalen Geschichtswissenschaft
Creators: name: Scheltjens, Werner
name: Schlieder, Christoph
Publisher: name: Zenodo
Year: 2022
Subjects: Digitale Geschichte
Historische Metrologie
Kompetenzfragen
Ontologische Modellierung
Inhaltsanalyse
Modellierung
Annotieren
Bearbeitung
Forschungsprozess
Text
DHd2022

description: Eine Posterpräsentation auf der 8. Tagung des Verbands "Digital Humanities im deutschsprachigen Raum" - DHd 2022 Kulturen des digitalen Gedächtnisses.
adkf-ift-weights.zip
Creators: name: Chen, Wenlin
name: Tripp, Austin
Publisher: name: figshare
Year: 2023
Subjects: Modelling and simulation

description: Model weights for ADKF-IFT trained on FS-Mol used in the paper "Meta-learning Adaptive Deep Kernel Gaussian Processes for Molecular Property Prediction" published at ICLR 2023.
Maximizing the thermoelectric performance of topological insulator Bi2Te3 films in the few-quintuple layer regime
Creators: name: Liang, Jinghua
name: Cheng, Long
name: Zhang, Jie
name: Liu, Huijun
name: Zhang, Zhenyu
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Using first-principles calculations and Boltzmann theory, we explore the feasibility to maximize the thermoelectric figure of merit (ZT) of topological insulator Bi2Te3 films in the few-quintuple layer regime. We discover that the delicate competitions between the surface and bulk contributions, coupled with the overall quantum size effects, lead to a novel and generic non-monotonous dependence of ZT on the film thickness. In particular, when the system crosses into the topologically non-trivial regime upon increasing the film thickness, the much longer surface relaxation time associated with the robust nature of the topological surface states results in a maximal ZT value, which can be further optimized to ~2.0 under physically realistic conditions. We also reveal the appealing potential of bridging the long-standing ZT asymmetry of p- and n-type Bi2Te3 systems.
Sequential Monte Carlo With Model Tempering
Creators: name: Mlikota, Marko
name: Schorfheide, Frank
Publisher: name: arXiv
Year: 2022
Subjects: subject: Econometrics (econ.EM)
subject: FOS: Economics and business

description: Modern macroeconometrics often relies on time series models for which it is time-consuming to evaluate the likelihood function. We demonstrate how Bayesian computations for such models can be drastically accelerated by reweighting and mutating posterior draws from an approximating model that allows for fast likelihood evaluations, into posterior draws from the model of interest, using a sequential Monte Carlo (SMC) algorithm. We apply the technique to the estimation of a vector autoregression with stochastic volatility and a nonlinear dynamic stochastic general equilibrium model. The runtime reductions we obtain range from 27% to 88%.
Pre-planetary nebulae: a context for principles, progress, and questions on how binaries and magnetic fields produce jets
Creators: name: Blackman, Eric G.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Astrophysical outflows treated initially as spherically symmetric often show evidence for asymmetry once seen at higher resolution. The preponderance of aspherical and multipolar planetary nebulae (PN) and pre-planetary nebulae (PPN) was evident after many observations from the Hubble Space Telescope. Binary interactions have long been thought to be essential for shaping asymmetric PN/PPN, but how? PPN are the more kinematically demanding of the two, and warrant particular focus. I address how progress from observation and theory suggests two broad classes of accretion driven PPN jets: one for wider binaries (PPN-W) where the companion is outside the outer radius of the giant and accretes via Roche lobe overflow, and the other which occurs in the later stages of common envelope evolution (CEE) for close binaries (PPN-C). The physics within these scenarios connects to progress and open questions about the role and origin of magnetic fields in the engines and in astrophysical jets more generally.
description: 20 Pages, 4 figures; review published in the Proceedings of IAU Symposium 366: "The Origin of Outflows in Evolved Stars"; L. Decin, A.A. Z\"ylstra and C. Gielen, editors; this version updated post-publication to include Corrigendum: minor typos to equations 2.1, 2.3, and 2.7 have been corrected herein
Goals and challenges in hybrid software development approaches
Creators: name: Prenner, Nils
name: Unger‐Windeler, Carolin
name: Schneider, Kurt
Publisher: name: New York, NY [u.a.] : Wiley-Blackwell
Year: 2021
Subjects: subject: agile development
subject: hybrid development approaches
subject: plan-based development
subject: systematic mapping study
subject: Dewey Decimal Classification::000 | Allgemeines, Wissenschaft::000 | Informatik, Wissen, Systeme::004 | Informatik

description: The number of companies that use agile methods increases steadily. However, these companies often do not implement a pure agile approach but combine agile and plan-based methods to so-called hybrid development approaches. However, the development of these approaches is rather difficult for the companies, since agile and plan-based approaches often follow opposite concepts. To benefit from agile and plan-based approaches at the same time, the companies have to identify and address the conflicts between agile and plan-based methods. The conflicts depend on the goals that are pursued with the implementation of agile and plan-based methods. However, there is no overview of the exact goals that are pursued in hybrid approaches and which challenges and conflicts arise with them. Therefore, we conducted a systematic mapping study to gather and analyze the goals and challenges in hybrid development approaches. The mapping study is focused on literature that presents the actual needs and goals of companies and projects. Based on our results, we present the influence factors that cause conflicts in hybrid approaches and discuss how these conflicts can be addressed.
Deep Convolutional Autoencoder for Assessment of Drive-Cycle Anomalies in Connected Vehicle Sensor Data
Creators: name: Geglio, Anthony
name: Hedayati, Eisa
name: Tascillo, Mark
name: Anderson, Dyche
name: Barker, Jonathan
name: Havens, Timothy C.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences
subject: C.3; I.2.1; I.2.6; I.5.1

description: This work investigates a practical and novel method for automated unsupervised fault detection in vehicles using a fully convolutional autoencoder. The results demonstrate the algorithm we developed can detect anomalies which correspond to powertrain faults by learning patterns in the multivariate time-series data of hybrid-electric vehicle powertrain sensors. Data was collected by engineers at Ford Motor Company from numerous sensors over several drive cycle variations. This study provides evidence of the anomaly detecting capability of our trained autoencoder and investigates the suitability of our autoencoder relative to other unsupervised methods for automatic fault detection in this data set. Preliminary results of testing the autoencoder on the powertrain sensor data indicate the data reconstruction approach availed by the autoencoder is a robust technique for identifying the abnormal sequences in the multivariate series. These results support that irregularities in hybrid-electric vehicles' powertrains are conveyed via sensor signals in the embedded electronic communication system, and therefore can be identified mechanistically with a trained algorithm. Additional unsupervised methods are tested and show the autoencoder performs better at fault detection than outlier detectors and other novel deep learning techniques.
description: SSCI2022, 7 pages, 3 Tables, 3 Figures
Lethality of high-pressure carbon dioxide on Shiga toxin-producing Escherichia coli, Salmonella and surrogate organisms on beef jerky
Creators: Schultze, Danielle M.
Couto, Ricardo
Temelli, Feral
McMullen, Lynn M.
Ganzle, Michael G.
Publisher: name: University of Alberta Library
Year: 2020

Low water activity (aW) foods permit the survival of low-infectious dose pathogens including Escherichia coli and Salmonella. Desiccation of non-heat resistant E. coli and Salmonella enterica increases their heat resistance; therefore, alternative methods are necessary to ensure the safety of low aW foods. High-pressure carbon dioxide (HPCD) reduced microbial contaminants in high aW foods. This study aimed to identify HPCD conditions that reduce pathogenic E. coli and Salmonella in low aW conditions. Four strains of Shiga toxin-producing E. coli (STEC) and one strain of enteropathogenic E. coli were treated as a cocktail, and five strains of Salmonella were treated individually. The suitability of E. coli AW1.7, Pediococcus acidilactici FUA 3072, Enterococcus faecium NRRL B-2354 and Staphylococcus carnosus R6 FUA 2133 as surrogate organisms was evaluated. Treatments were validated in beef jerky. Samples were equilibrated to aW 0.75 and treated with heat, HPCD or pressurized N2. Treatment of desiccated E. coli AW1.7 and the STEC cocktail with dry gaseous CO2 (5.7 MPa and 65 °C) did not reduce cell counts; however, treatment with gaseous CO2 saturated with water reduced cell counts of all strains of E. coli. Treatment of beef jerky inoculated with E. coli and Salmonella with saturated gaseous CO2 resulted in >5-log reductions for all strains. E. faecium NRRL B-2354 and S. carnosus R6 were suitable surrogates for Salmonella on beef jerky treated with HPCD. Treatment of beef jerky with water-saturated gaseous CO2 was more effective than treatment with supercritical CO2 or treatments with N2 at the same temperature and pressure. Overall, the treatment of low aW foods with water-saturated gaseous HPCD can meet industry standards by achieving a >5-log reductions of E. coli and Salmonella. Additionally, surrogate organisms representing pathogenic E. coli and Salmonella have been validated.
Healthcare Costs Savings Associated With Danish Disease Management Program for Diabetic Patients: Danish Healthcare System Cost Impacts of a Disease Management Program for Diabetic Patients
Creators: name: Pulleyblank, Ryan
Publisher: name: Zenodo
Year: 2018

description: Preliminary analyses investigating Danish healthcare system cost impacts of a disease management program for diabetic patients using propensity score matching. Presented at EuHEA 2018.
 Original Abstract Text: Title: Healthcare Costs Savings Associated With Danish Disease Management Program for Diabetic Patients Authors: Ryan Pulleyblank, PhD Student, University of Southern Denmark Background: Previous research has demonstrated that Electronic Health Record-based Disease Management Programs (EHR/DMP) implemented in general practice to improve the quality of care delivered to patients with chronic conditions may be associated with reductions in secondary care admissions. The extent to which EHR/DMP used in general practice may result in net cost-savings for public-payer healthcare systems is less clear. Objectives: To estimate financial impacts on diabetes patients’ healthcare treatment associated with the implementation of an EHR/DMP used in general practice in Denmark. Methods/Data We analyze data collected between 2010-2014 while primary care practices in Denmark were obligated to enroll in a national EHR/DMP. In addition to the EHR database, primary care, secondary care, and prescription pharmaceutical administrative (billing) databases were used to identify diabetes patients and their healthcare resource use (costs). Implementation of the program across practices was distinguished from mere enrollment by determining the percentage of patient visits that were entered into the EHR (above 70%), and the frequency that GPs logged into the diabetes disease management interface. The gradual enrollment of practices between 2010-2014 was used to separate time-trends from causal influences of the EHR/DMP. Using a propensity score-matching framework, healthcare resource use (costs) was estimated for diabetes patients based in and out of GP practices where the program was implemented. Differences-in-differences analysis was used as a robustness check. Results The analysis estimated healthcare resource cost savings of 1,575DKK per diabetes patient per year in practices where the EHR/DMP was implemented. This compares to an overall average annual cost of healthcare treatment per diabetic patient of 30,000DKK, and is mostly attributed to reduced hospitalization amongst diabetes patients attending general practices where the program was implemented. Discussion This research provides evidence that use of non-financial incentives (EHR/DMP) in primary care can result in financial cost-savings within the context of a publicly financed healthcare system. Unfortunately political/privacy concerns resulted in abandonment of the program in late 2014, limiting the evidence available from this natural experiment
SRL-SOA: Self-Representation Learning with Sparse 1D-Operational Autoencoder for Hyperspectral Image Band Selection
Creators: name: Ahishali, Mete
name: Kiranyaz, Serkan
name: Ahmad, Iftikhar
name: Gabbouj, Moncef
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: The band selection in the hyperspectral image (HSI) data processing is an important task considering its effect on the computational complexity and accuracy. In this work, we propose a novel framework for the band selection problem: Self-Representation Learning (SRL) with Sparse 1D-Operational Autoencoder (SOA). The proposed SLR-SOA approach introduces a novel autoencoder model, SOA, that is designed to learn a representation domain where the data are sparsely represented. Moreover, the network composes of 1D-operational layers with the non-linear neuron model. Hence, the learning capability of neurons (filters) is greatly improved with shallow architectures. Using compact architectures is especially crucial in autoencoders as they tend to overfit easily because of their identity mapping objective. Overall, we show that the proposed SRL-SOA band selection approach outperforms the competing methods over two HSI data including Indian Pines and Salinas-A considering the achieved land cover classification accuracies. The software implementation of the SRL-SOA approach is shared publicly at https://github.com/meteahishali/SRL-SOA.
Characterizing Grounded Theory Approaches in Visualization
Creators: name: Diehl, Alexandra
name: Abdul-Rahman, Alfie
name: Bach, Benjamin
name: El-Assady, Mennatallah
name: Kraus, Matthias
name: Laramee, Robert S.
name: Keim, Daniel A.
name: Chen, Min
Publisher: name: arXiv
Year: 2022
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Grounded theory (GT) is a research methodology that entails a systematic workflow for theory generation grounded on emergent data. In this paper, we juxtapose GT workflows with typical workflows in visualization and visual analytics, shortly VIS, and underline the characteristics shared by these workflows. We explore the research landscape of VIS to observe where GT has been applied to generate VIS theories, explicitly as well as implicitly. We propose a "why" typology for characterizing aspects in VIS where GT can potentially play a significant role. We outline a "how" methodology for conducting GT research in VIS, which addresses the need for theoretical advancement in VIS while benefitting from other methods and techniques in VIS. We exemplify this "how" methodology by adopting GT approaches in studying the messages posted on VisGuides - an Open Discourse Forum for discussing visualization guidelines.
Force and heat current formulas for many-body potentials in molecular dynamics simulation with applications to thermal conductivity calculations
Creators: name: Fan, Zheyong
name: Pereira, Luiz Felipe C.
name: Wang, Hui-Qiong
name: Zheng, Jin-Cheng
name: Donadio, Davide
name: Harju, Ari
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We derive expressions of interatomic force and heat current for many-body potentials such as the Tersoff, the Brenner, and the Stillinger-Weber potential used extensively in molecular dynamics simulations of covalently bonded materials. Although these potentials have a many-body nature, a pairwise force expression that follows Newton's third law can be found without referring to any partition of the potential. Based on this force formula, a stress applicable for periodic systems can be unambiguously defined. The force formula can then be used to derive the heat current formulas using a natural potential partitioning. Our heat current formulation is found to be equivalent to most of the seemingly different heat current formulas used in the literature, but to deviate from the stress-based formula derived from two-body potential. We validate our formulation numerically on various systems descried by the Tersoff potential, namely three-dimensional silicon and diamond, two-dimensional graphene, and quasi-one-dimensional carbon nanotube. The effects of cell size and time used in the simulation are examined.
description: 14 pages, 6 figures
Fractional Calderón problems and Poincaré inequalities on unbounded domains
Creators: name: Railo, Jesse
name: Zimmermann, Philipp
Publisher: name: arXiv
Year: 2022
Subjects: subject: Analysis of PDEs (math.AP)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 35R30, 26A33, 42B37, 46F12

description: We generalize many recent uniqueness results on the fractional Calderón problem to cover the cases of all domains with nonempty exterior. The highlight of our work is the characterization of uniqueness and nonuniqueness of partial data inverse problems for the fractional conductivity equation on domains that are bounded in one direction for conductivities supported in the whole Euclidean space and decaying to a constant background conductivity at infinity. We generalize the uniqueness proof for the fractional Calderón problem by Ghosh, Salo and Uhlmann to a general abstract setting in order to use the full strength of their argument. This allows us to observe that there are also uniqueness results for many inverse problems for higher order local perturbations of a lower order fractional Laplacian. We give concrete example models to illustrate these curious situations and prove Poincaré inequalities for the fractional Laplacians of any order on domains that are bounded in one direction. We establish Runge approximation results in these general settings, improve regularity assumptions also in the cases of bounded sets and prove general exterior determination results. Counterexamples to uniqueness in the inverse fractional conductivity problem with partial data are constructed in another companion work.
description: 46 pages, 3 figures
title: 'Our true intent is all for your delight': Placing materiality, mobility, atmosphere, and affect at Scotland's travelling fairgrounds
Creators: name: Lacsny, Elisabeth Alice
Publisher: name: University of Glasgow
Year: 2020
Subjects: subject: Showpeople, fairgrounds, materiality, affect, atmosphere.

description: Travelling fairgrounds have toured Scotland since the late-eighteenth century. Today, the arrival of the fair remains a staple feature of annual civic festivities in towns across the country, from Ayr to Elgin and everywhere in between. The much-loved fairground experience is dependent on the manufacture and design of movable machinery that magically transforms into looping, spinning, whirling, and flashing objects. The traditional array of amusement rides, supporting stalls, and food concessions that go to make ‘all the fun of the fair’, are owned and transported by family firms, several of whom have a long history in the trade spanning multiple generations. These Showpeople have multiple geographies of their own, combining year-round communities and seasonal journeys according to a recognised calendar of fairs. Travelling between towns across Scotland enables Showpeople to share their craft, heritage, and history with thrill-seeking publics. Although recognised by Scotland’s former first minister as ‘an important part of Scotland’s culture, history, and economy’ (Salmond, 2009), Showpeople have long struggled to find recognition as a community. As such, it is important to examine the material and immaterial geographies of the fair, questioning how they impact awareness of Showpeople in contemporary Scottish society. Shaped by oral histories and ethnographic experience, this thesis addresses the material and immaterial culture of Scotland’s travelling fairgrounds in terms of design, mobility, and artistry; engages with the production of fairs as spaces of affect and nostalgia; pre-theorises contemporary popular culture; and, critically considers the social constraints placed on travellers in contemporary Scotland. It reconfigures the fairground space and aims to challenge commonplace prejudices associated with the material and immaterial heritage of Scotland’s show-culture and Showpeople. Ultimately, this thesis presents a different representation of Scotland’s travelling fairgrounds, offering insights into the geographies at work in this space.
Counterexamples to uniqueness in the inverse fractional conductivity problem with partial data
Creators: name: Railo, Jesse
name: Zimmermann, Philipp
Publisher: name: arXiv
Year: 2022
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35R30, 26A33, 42B37, 46F12

description: We construct counterexamples for the partial data inverse problem for the fractional conductivity equation in all dimensions on general bounded open sets. In particular, we show that for any bounded domain $Ω\subset \mathbb{R}^n$ and any disjoint open sets $W_1,W_2 \Subset \mathbb{R}^n \setminus \barΩ$ there always exist two positive, bounded, smooth, conductivities $γ_1,γ_2$, $γ_1 \neq γ_2$, with equal partial exterior Dirichlet-to-Neumann maps $Λ_{γ_1}f|_{W_2} = Λ_{γ_2}f|_{W_2}$ for all $f \in C_c^\infty(W_1)$. The proof uses the characterization of equal exterior data from another work of the authors in combination with the maximum principle of fractional Laplacians. The main technical difficulty arises from the requirement that the conductivities should be strictly positive and have a special regularity property $γ_i^{1/2}-1 \in H^{2s,\frac{n}{2s}}(\mathbb{R}^n)$ for $i=1,2$. We also provide counterexamples on domains that are bounded in one direction when $n \geq 4$ or $s \in (0,n/4]$ when $n=2,3$ using a modification of the argument on bounded domains.
description: 14 pages, 2 figures, final version
Cronache marziane. In risposta a 11 domande su Olivetti
Creators: name: Francalanci, Ernesto L.
Publisher: name: La Rivista di Engramma
Year: 2019
Subjects: Olivetti
Red Star
Bogdanov
Cinema
Bolshevik revolution
Martian socialist

description: The relationship between capital and labour is at the center of the reflections of Ernesto Luciano Francalanci who proposes a parallel between Olivetti’s thought and the science fiction novel Red Star by Aleksander Bogdanov. Francalanci finds that the social, philosophical, economical and cultural model imagined by the Bolshevik revolutionist shares some things in common with Olivetti’s “revolutionary project”. They share the centrality of the human, and just as in the Martian socialist community fancied by Bogdanov, it was only in Olivetti’s “extraterrestrial colony” – his “Community and Factory” – that people could hope, sharing the “project” of a new world to come.
A problem of Petersson about weight 0 meromorphic modular forms
Creators: name: Bringmann, Kathrin
name: Kane, Ben
Publisher: name: arXiv
Year: 2015
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11F03, 11F12, 11F25

description: In this paper, we provide an explicit construction of weight $0$ meromorphic modular forms. Following work of Petersson, we build these via Poincaré series. There are two main aspects of our investigation which differ from his approach. Firstly, the naive definition of the Poincaré series diverges and one must analytically continue via Hecke's trick. Hecke's trick is further complicated in our situation by the fact that the Fourier expansion does not converge everywhere due to singularities in the upper half-plane so it cannot solely be used to analytically continue the functions. To explain the second difference, we recall that Petersson constructed linear combinations from a family of meromorphic functions which are modular if a certain principal parts condition is satisfied. In contrast to this, we construct linear combinations from a family of non-meromorphic modular forms, known as polar harmonic Maass forms, which are meromorphic whenever the principal parts condition is satisfied.
Experimental realization of a fermionic spin-momentum lattice
Creators: name: Lauria, Paul
name: Kuo, Wei-Ting
name: Cooper, Nigel R.
name: Barreiro, Julio T.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We experimentally realize a spin-momentum lattice with a homogeneously trapped Fermi gas. The lattice is created via cyclically-rotated atom-laser couplings between three bare atomic spin states, and are such that they form a triangular lattice in a synthetic spin-momentum space. We demonstrate the lattice and explore its dynamics with spin- and momentum-resolved absorption imaging. This platform will provide new opportunities for synthetic spin systems and the engineering of topological bands. In particular, the use of three spin states in two spatial dimensions would allow the simulation of synthetic magnetic fields of high spatial uniformity, which would lead to ultra-narrow Chern bands that support robust fractional quantum Hall states.
description: 13 pages, 8 figures
Integrable bi-Hamiltonian systems by Jacobi structure on real three-dimensional Lie groups
Creators: name: Amirzadeh-Fard, H.
name: Haghighatdoost, Gh.
name: Rezaei-Aghdam, A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: By Poissonization of Jacobi structures on real three-dimensional Lie groups $\mathbf{G}$ and using the realizations of their Lie algebras, we obtain integrable bi-Hamiltonian systems on $\mathbf{G}\otimes \mathbb{R}$.
description: 18 pages
An evolutionary game theory explanation of ARCH effects
Creators: name: Parke, William
name: Waters, George
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2007

description: ARCH/GARCH models have been widely used to examine financial markets data, but formal explanations for the sources of conditional volatility are lacking. This paper demonstrates the existence of GARCH effects similar to those found in asset returns, in a standard asset pricing model with heterogeneous agents. Evolutionary game theory describes how agents endogenously switch between different forecasting strategies based on past forecast errors. We show conditions under which agents agree on the fundamental forecast and those where agents adopt strategies that use extraneous information. Divergence from agreement on fundamentals could lead to periods of high volatility in prices and returns. Econometric tests of simulated data show the existence of GARCH effects, we examine the impact of changes in the model parameters.
Nuclear ashes and outflow in the eruptive star Nova Vul 1670
Creators: name: Kaminski, Tomasz
name: Menten, Karl M.
name: Tylenda, Romuald
name: Hajduk, Marcin
name: Patel, Nimesh A.
name: Kraus, Alexander
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: CK Vulpeculae was observed in outburst in 1670-16721, but no counterpart was seen until 1982, when a bipolar nebula was found at its location. Historically, CK Vul has been considered to be a nova (Nova Vul 1670), but a similarity to 'red transients', which are more luminous than classical nova and thought to be the result of stellar collisions, has re-opened the question of CK Vul's status. Red transients cool to resemble late M-type stars, surrounded by circumstellar material rich in molecules and dust. No stellar source has been seen in CK Vul, though a radio continuum source was identified at the expansion centre of the nebula. Here we report CK Vul is surrounded by chemically rich molecular gas with peculiar isotopic ratios, as well as dust. The chemical composition cannot be reconciled with a nova or indeed any other known explosion. In addition, the mass of the surrounding gas is too high for a nova, though the conversion from observations of CO to a total mass is uncertain. We conclude that CK Vul is best explained as the remnant of a merger of two stars.
description: an older version of an article that appeared in Nature; published in Nature, online version, 23 March 2015
Path Development Network with Finite-dimensional Lie Group Representation
Creators: name: Lou, Hang
name: Li, Siran
name: Ni, Hao
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: G.3; I.5.1
subject: 60L10

description: Signature, lying at the heart of rough path theory, is a central tool for analysing controlled differential equations driven by irregular paths. Recently it has also found extensive applications in machine learning and data science as a mathematically principled, universal feature that boosts the performance of deep learning-based models in sequential data tasks. It, nevertheless, suffers from the curse of dimensionality when paths are high-dimensional.
 We propose a novel, trainable path development layer, which exploits representations of sequential data through finite-dimensional Lie groups, thus resulting in dimension reduction. Its backpropagation algorithm is designed via optimization on manifolds. Our proposed layer, analogous to recurrent neural networks (RNN), possesses an explicit, simple recurrent unit that alleviates the gradient issues.
 Our layer demonstrates its strength in irregular time series modelling. Empirical results on a range of datasets show that the development layer consistently and significantly outperforms signature features on accuracy and dimensionality. The compact hybrid model (stacking one-layer LSTM with the development layer) achieves state-of-the-art against various RNN and continuous time series models. Our layer also enhances the performance of modelling dynamics constrained to Lie groups. Code is available at https://github.com/PDevNet/DevNet.git.
Uncertainty principles for the short-time Fourier transform on the lattice
Creators: name: Poria, Anirudha
name: Dasgupta, Aparajita
Publisher: name: arXiv
Year: 2022
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: Primary 44A15, Secondary 42C20, 33C45

description: In this paper, we study a few versions of the uncertainty principle for the short-time Fourier transform on the lattice $\mathbb Z^n \times \mathbb T^n$. In particular, we establish the uncertainty principle for orthonormal sequences, Donoho--Stark's uncertainty principle, Benedicks-type uncertainty principle, Heisenberg-type uncertainty principle and local uncertainty inequality for this transform on $\mathbb Z^n \times \mathbb T^n$. Also, we obtain the Heisenberg-type uncertainty inequality using the $k$-entropy of the short-time Fourier transform on $\mathbb Z^n \times \mathbb T^n$.
description: arXiv admin note: substantial text overlap with arXiv:2107.00954
Digestibility of branched and linear α-gluco-oligosaccharides in vitro and in ileal-cannulated pigs
Creators: Hu, Ying
Heyer, Charlotte M.E.
Wang, Weilan
Zijlstra, Ruurd T.
Ganzle, Michael G.
Publisher: name: University of Alberta Library
Year: 2020

Isomalto-oligosaccharides (IMOs) may promote health by modulating intestinal microbiota. We hypothesized that the proportion of α–(1 → 6) linkages in IMOs determines their digestibility. Ileal-cannulated pigs were fed diets containing IMO, IMO-DP3 with a greater DP and more α-(1 → 4) linkages, and digestible or resistant maltodextrins. Oligosaccharides were analysed by high-performance anion-exchange chromatography. Compared to IMO, IMO-DP3 contained more panose (18.6 vs. 10.3%) but less isomaltose (7.5 vs. 22.3%) and isomaltotriose (6.1 vs. 12.6%). The apparent ileal digestibility of dry matter were 3% greater for IMO-DP3 and digestible maltodextrin than resistant maltodextrin; the digestibility of IMO was not different from other oligosaccharides. Ileal propionate, isovalerate, and total SCFA was greater for IMO-DP3 and digestible maltodextrin than IMO. In conclusion, IMO was less digestible than IMO-DP3. Structural properties of IMOs are important determinants of their functional properties within the porcine digestive tract.
Estimation-Throughput Tradeoff for Underlay Cognitive Radio Systems
Creators: name: Kaushik, Ankit
name: Sharma, Shree Krishna
name: Chatzinotas, Symeon
name: Ottersten, Björn
name: Jondral, Friedrich
Publisher: name: arXiv
Year: 2015
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Understanding the performance of cognitive radio systems is of great interest. To perform dynamic spectrum access, different paradigms are conceptualized in the literature. Of these, Underlay System (US) has caught much attention in the recent past. According to US, a power control mechanism is employed at the Secondary Transmitter (ST) to constrain the interference at the Primary Receiver (PR) below a certain threshold. However, it requires the knowledge of channel towards PR at the ST. This knowledge can be obtained by estimating the received power, assuming a beacon or a pilot channel transmission by the PR. This estimation is never perfect, hence the induced error may distort the true performance of the US. Motivated by this fact, we propose a novel model that captures the effect of channel estimation errors on the performance of the system. More specifically, we characterize the performance of the US in terms of the estimation-throughput tradeoff. Furthermore, we determine the maximum achievable throughput for the secondary link. Based on numerical analysis, it is shown that the conventional model overestimates the performance of the US.
description: 6 pages, 5 figures, to appear in Proceedings of IEEE International Conference on Communications (ICC) - Cognitive Radio and Networks Symposium, June 2015, London, UK
Some developments around the Katznelson-Tzafriri theorem
Creators: name: Batty, Charles
name: Seifert, David
Publisher: name: arXiv
Year: 2022
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 47A05

description: This paper is a survey article on developments arising from a theorem proved by Katznelson and Tzafriri in 1986 showing that $\lim_{n\to\infty} \|T^n(I-T)\| =0$ if $T$ is a power-bounded operator on a Banach space and $σ(T) \cap \T \subseteq \{1\}$. Many variations and consequences of the original theorem have been proved subsequently, and we provide an account of this branch of operator theory.
Inferring monetary policy objectives with a partially observed state
Creators: name: Givens, Gregory
name: Salemi, Michael
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2015

description: Accounting for the uncertainty inherent in real-time perceptions of the state of the economy is believed to be critical for the analysis of historical monetary policy. We investigate this claim through the lens of a small-scale new-Keynesian model with optimal discretionary policy and partial information about the state. The model is estimated using maximum likelihood on US data over the Volcker-Greenspan-Bernanke regime. A comparison of our estimates to those from a version of the model with complete information reveals that under partial information: (i) the Federal Reserve demonstrates a significant concern for stabilizing fluctuations in the output gap, and (ii) the discrepancy between optimal and observed policy behavior is smaller.
An alternative Hamiltonian formulation for the Pais-Uhlenbeck oscillator
Creators: name: Masterov, Ivan
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Ostrogradsky's method allows one to construct Hamiltonian formulation for a higher derivative system. An application of this approach to the Pais-Uhlenbeck oscillator yields the Hamiltonian which is unbounded from below. This leads to the ghost problem in quantum theory. In order to avoid this nasty feature, the technique previously developed in [Acta Phys. Polon. B 36 (2005) 2115] is used to construct an alternative Hamiltonian formulation for the multidimensional Pais-Uhlenbeck oscillator of arbitrary even order with distinct frequencies of oscillation. This construction is also generalized to the case of an N=2 supersymmetric Pais-Uhlenbeck oscillator.
description: Typos corrected. Published version
Deliverable 1.2b_ ITER Project_24M Management report
Creators: name: Di Sipio, Eloisa
name: Bertermann, David
Publisher: name: Zenodo
Year: 2017
Subjects: ITER Project, management, thermal efficiency, environmental impact, dissemination

description: DL 1.2b is the management report of the ITER Project activities and research phases in the 24 months (24M) of Project duration.
Datenschutz in der wissenschaftlichen Praxis - Der DARIAH-EU ELDAH Consent Form Wizard
Creators: name: Scholger, Walter
name: Hannesschläger, Vanessa
name: Kamocki, Pawel
name: Kuzman-Šlogar, Koraljka
Publisher: name: Zenodo
Year: 2022
Subjects: Datenschutz
Wissenschaftethik
Forschungsdaten
Sammlung
Veröffentlichung
Organisation
Daten
Personen
Werkzeuge
DHd2022

description: Eine Posterpräsentation auf der 8. Tagung des Verbands "Digital Humanities im deutschsprachigen Raum" - DHd 2022 Kulturen des digitalen Gedächtnisses.
A continuous-parameter Katznelson-Tzafriri theorem for algebras of analytic functions
Creators: name: Batty, Charles
name: Seifert, David
Publisher: name: arXiv
Year: 2022
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 47A60

description: We prove a continuous-parameter version of the recent theorem of Katznelson-Tzafiri type for power-bounded operators which have a bounded calculus for analytic Besov functions. We also show that the result can be extended to some operators which have functional calculi with respect to some larger algebras.
description: New title, to reflect the improvement in our main result. Accepted for publication in Studia Mathematica
Magnetic Laplacian in sharp three dimensional cones
Creators: name: Bonnaillie-Noël, Virginie
name: Dauge, Monique
name: Popoff, Nicolas
name: Raymond, Nicolas
Publisher: name: arXiv
Year: 2015
Subjects: subject: Spectral Theory (math.SP)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: The core result of this paper is an upper bound for the ground state energyof the magnetic Laplacian with constant magnetic field on cones that are contained in ahalf-space. This bound involves a weighted norm of the magnetic field related to momentson a plane section of the cone. When the cone is sharp, i.e. when its section is small, thisupper bound tends to 0. A lower bound on the essential spectrum is proved for familiesof sharp cones, implying that if the section is small enough the ground state energy is aneigenvalue. This circumstance produces corner concentration in the semi-classical limit forthe magnetic Schrödinger operator when such sharp cones are involved.