cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Spatiotemporal instabilities and pattern formation in systems of diffusively coupled Izhikevich neurons
Creators: name: Mondal, Argha
name: Hens, Chittaranjan
name: Mondal, Arnab
name: Antonopoulos, Chris G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: Neurons are often connected, spatially and temporally, in phenomenal ways that promote wave propagation. Therefore, it is essential to analyze the emergent spatiotemporal patterns to understand the working mechanism of brain activity, especially in cortical areas. Here, we present an explicit mathematical analysis, corroborated by numerical results, to identify and investigate the spatiotemporal, non-uniform, patterns that emerge due to instability in an extended homogeneous 2D spatial domain, using the excitable Izhikevich neuron model. We examine diffusive instability and perform bifurcation and fixed-point analyses to characterize the patterns and their stability. Then, we derive analytically the amplitude equations that establish the activities of reaction-diffusion structures. We report on the emergence of diverse spatial structures including hexagonal and mixed-type patterns by providing a systematic mathematical approach, including variations in correlated oscillations, pattern variations and amplitude fluctuations. Our work shows that the emergence of spatiotemporal behavior, commonly found in excitable systems, has the potential to contribute significantly to the study of diffusively-coupled biophysical systems at large.
description: 12 pages, 4 figures
Additional file 2 of tRF-3013b inhibits gallbladder cancer proliferation by targeting TPRG1L
Creators: name: Zou, Lu
name: Yang, Yang
name: Zhou, Biyu
name: Li, Weijian
name: Liu, Ke
name: Li, Guoqiang
name: Miao, Huijie
name: Song, Xiaoling
name: Yang, Jiahua
name: Geng, Yajun
name: Li, Maolan
name: Bao, Runfa
name: Liu, Yingbin
Publisher: name: figshare
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 2: Table S2. RNA oligos used in the study.
Convolutional Neural Networks Are Not Invariant to Translation, but They Can Learn to Be
Creators: name: Biscione, Valerio
name: Bowers, Jeffrey S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: When seeing a new object, humans can immediately recognize it across different retinal locations: the internal object representation is invariant to translation. It is commonly believed that Convolutional Neural Networks (CNNs) are architecturally invariant to translation thanks to the convolution and/or pooling operations they are endowed with. In fact, several studies have found that these networks systematically fail to recognise new objects on untrained locations. In this work, we test a wide variety of CNNs architectures showing how, apart from DenseNet-121, none of the models tested was architecturally invariant to translation. Nevertheless, all of them could learn to be invariant to translation. We show how this can be achieved by pretraining on ImageNet, and it is sometimes possible with much simpler data sets when all the items are fully translated across the input canvas. At the same time, this invariance can be disrupted by further training due to catastrophic forgetting/interference. These experiments show how pretraining a network on an environment with the right `latent' characteristics (a more naturalistic environment) can result in the network learning deep perceptual rules which would dramatically improve subsequent generalization.
Generalised bottom-up holography and walking technicolour
Creators: name: Dietrich, Dennis D.
name: Kouvaris, Chris
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In extradimensional holographic approaches the flavour symmetry is gauged in the bulk, that is, treated as a local symmetry. Imposing such a local symmetry admits fewer terms coupling the (axial) vectors and (pseudo)scalars than if a global symmetry is imposed. The latter is the case in standard low-energy effective Lagrangians. Here we incorporate these additional, a priori only globally invariant terms into a holographic treatment by means of a Stueckelberg completion and alternatively by means of a Legendre transformation. This work was motivated by our investigations concerning dynamical electroweak symmetry breaking by walking technicolour and we apply our findings to these theories.
description: 12 pages, 5 figures
Enhancing Computational Notebooks with Code+Data Space Versioning
Creators: name: Fang, Hanxi
name: Chockchowwat, Supawit
name: Sundaram, Hari
name: Park, Yongjoo
Publisher: name: arXiv
Year: 2025
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: There is a gap between how people explore data and how Jupyter-like computational notebooks are designed. People explore data nonlinearly, using execution undos, branching, and/or complete reverts, whereas notebooks are designed for sequential exploration. Recent works like ForkIt are still insufficient to support these multiple modes of nonlinear exploration in a unified way. In this work, we address the challenge by introducing two-dimensional code+data space versioning for computational notebooks and verifying its effectiveness using our prototype system, Kishuboard, which integrates with Jupyter. By adjusting code and data knobs, users of Kishuboard can intuitively manage the state of computational notebooks in a flexible way, thereby achieving both execution rollbacks and checkouts across complex multi-branch exploration history. Moreover, this two-dimensional versioning mechanism can easily be presented along with a friendly one-dimensional history. Human subject studies indicate that Kishuboard significantly enhances user productivity in various data science tasks.
description: 17 pages, CHI 2025, Yokohama, Japan
Phase Separation of Binary Systems
Creators: name: Ma, Tian
name: Wang, Shouhong
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In this Letter, three physical predictions on the phase separation of binary systems are derived based on a dynamic transition theory developed recently by the authors. First, the order of phase transitions is precisely determined by the sign of a parameter Kd (or a nondimensional parameter K) such that if Kd>0, the transition is first-order with latent heat and if Kd <0, the transition is second-order. Second, a theoretical transition diagram is derived, leading in particular to a prediction that there is only second-order transition for molar fraction near 1/2. This is different from the prediction made by the classical transition diagram. Third, a critical length scale is derived such that no phase separation occurs at any temperature if the length of the container is smaller than the critical length scale.
William Carson House, Lee Avenue
Creators: name: Weber, Harvey A.
Publisher: name: Unknown
Year: 1970
Subjects: Photographs
Photos
Historic buildings
East Hampton
Structures
Dwellings

description: This image is of the William Carson House on Lee Avenue in East Hampton. This image was taken by photographer Harvey A. Weber (1917-1991) and is part of the East Hampton’s Heritage Photo Collection.
description: Images within East Hampton Heritage Photo Collection seem to have been taken or collected in relation to the East Hampton Heritage project, but not all of them were included in the final publication. Several photographer are included in this collection.
Angular Distributions for Multi-body Semileptonic Charmed Baryon Decays
Creators: name: Huang, Fei
name: Zhang, Qi-An
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We perform an analysis of angular distributions in semileptonic decays of charmed baryons $B_1^{(\prime)}\to B_2^{(\prime)}(\to B_3^{(\prime)}B_4^{(\prime)})\ell^+ν_{\ell}$, where the $B_1=(Λ_c^+,Ξ_c^{(0,+)})$ are the SU(3)-antitriplet baryons and $B_1'=Ω_c^-$ is an SU(3) sextet. We will firstly derive analytic expressions for angular distributions using helicity amplitude technique. Based on the lattice QCD results for $Λ_c^+\toΛ$ and $Ξ_c^0\toΞ^-$ form factors and model calculation of the $Ω_c^0\toΩ^-$ transition, we predict branching fractions: $\mathcal{B}(Λ_{c}^{+} \rightarrow p π^{-} e^{+} ν_{e})=2.48(15)\%$, $\mathcal{B}(Λ_{c}^+\rightarrow p π^{-}μ^{+}ν_μ)=2.50(14)\%$, $\mathcal{B}(Ξ_{c}\rightarrow Λπ^{-}e^{+}ν_{e})=2.40(30)\%$, $\mathcal{B}(Ξ_{c}\rightarrow Λπ^{-}μ^{+}ν_ν)=2.41(30)\%$, $\mathcal{B}(Ω_{c}\rightarrow ΛK^{-}e^{+}ν_{e})=0.362(14)\%$, $\mathcal{B}(Ω_{c}\rightarrow ΛK^{-}μ^{+}ν_ν)=0.350(14)\%$. Besides, we also predict the $q^2$-dependence and angular distributions of these processes, in particular the coefficients for the $\cos nθ_{\ell}$ ($\cos nθ_{h}$, $\cos nϕ$) $(n=0, 1, 2, \cdots)$ terms. This work can provide a theoretical basis for the ongoing experiments at BESIII, LHCb and BELLE-II.
description: 24 pages, 5 figures
Inelastic cotunneling through a long diffusive wire
Creators: name: Feigelman, M. V.
name: Ioselevich, A. S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We show that electron transport through a long multichannel wire, connected to leads by tunnel junctions, at low temperatures and voltages is dominated by inelastic cotunnelling. This mechanism results in experimentally observed power-law dependence of conductance on temperature and voltage, in the diffusive regime where usual Coulomb anomaly theory leads to exponentially low conductance. The power-law exponent is proportional to the distance between contacts.
description: Calculational mistake is corrected: the power-law exponent in Eq.(6) is found to be independent on the position of contacts with respect to the ends of the wire
MINA XIII screening catalogue
Creators: name: Schleser, Max
Publisher: name: Swinburne
Year: 2025
Subjects: classificationCode: 3605
subject: Screen and digital media

description: MINA is the longest-running film festival in the Southern Hemisphere dedicated to mobile and smartphone filmmaking with a focus on moving-image arts, documentary, community-engaged film productions, experimental films and emerging film production forms and formats, such as MoJo, drone videos, AR, Mobile AI and Mobile Cinematic VR.With submissions from every continent, Schleser curated an international screening program for the 13th edition of the MINA Smartphone Film Festival. MINA#2024 featured mobile and smartphone films from Argentinian, Australia, Canada, France, Israel, New Zealand/Aotearoa, Portugal, Spain, United Kingdom and United States of America. As a festival with the merit to capture the innovations in screen storytelling as much as the contemporary Zeitgeist, Schleser included Mobile AI productions as part of the Innovation category.
UMFA: A photorealistic style transfer method based on U-Net and multi-layer feature aggregation
Creators: name: Rao, D. Y.
name: Wu, X. J.
name: Li, H.
name: Kittler, J.
name: Xu, T. Y.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this paper, we propose a photorealistic style transfer network to emphasize the natural effect of photorealistic image stylization. In general, distortion of the image content and lacking of details are two typical issues in the style transfer field. To this end, we design a novel framework employing the U-Net structure to maintain the rich spatial clues, with a multi-layer feature aggregation (MFA) method to simultaneously provide the details obtained by the shallow layers in the stylization processing. In particular, an encoder based on the dense block and a decoder form a symmetrical structure of U-Net are jointly staked to realize an effective feature extraction and image reconstruction. Besides, a transfer module based on MFA and "adaptive instance normalization" (AdaIN) is inserted in the skip connection positions to achieve the stylization. Accordingly, the stylized image possesses the texture of a real photo and preserves rich content details without introducing any mask or post-processing steps. The experimental results on public datasets demonstrate that our method achieves a more faithful structural similarity with a lower style loss, reflecting the effectiveness and merit of our approach.
Additional file 2 of Plastome evolution and phylogenomic insights into the evolution of Lysimachia (Primulaceae: Myrsinoideae)
Creators: name: Liu, Tong-Jian
name: Zhang, Shu-Yan
name: Wei, Lei
name: Lin, Wei
name: Yan, Hai-Fei
name: Hao, Gang
name: Ge, Xue-Jun
Publisher: name: figshare
Year: 2023
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: Biological Sciences not elsewhere classified
subject: Plant Biology

description: Additional file 2: Fig. S2. Correlation of intron and IGS length and Lysimachia plastome size. (a) Correlation of intron length and Lysimachia plastome size. (b) Correlation of IGS length and Lysimachia plastome size.
New absolute magnitude calibrations for detached binaries
Creators: name: Bilir, S.
name: Ak, T.
name: Soydugan, E.
name: Soydugan, F.
name: Yaz, E.
name: Ak, N. Filiz
name: Eker, Z.
name: Demircan, O.
name: Helvaci, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Lutz-Kelker bias corrected absolute magnitude calibrations for the detached binary systems with main-sequence components are presented. The absolute magnitudes of the calibrator stars were derived at intrinsic colours of Johnson-Cousins and 2MASS (Two Micron All Sky Survey) photometric systems. As for the calibrator stars, 44 detached binaries were selected from the Hipparcos catalogue, which have relative observed parallax errors smaller than 15% ($σ_π/π\leq0.15$). The calibration equations which provide the corrected absolute magnitude for optical and near-infrared pass bands are valid for wide ranges of colours and absolute magnitudes: $-0.18
description: 10 pages, 4 figures and 5 tables, accepted for publication in Astronomische Nachrichten
Non-elementary proper forcing
Creators: name: Kellner, Jakob
Publisher: name: arXiv
Year: 2009
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 03E35, 03E40

description: We introduce a simplified framework for ord-transitive models and Shelah's non elementary proper (nep) theory. We also introduce a new construction for the countable support nep iteration.
Additional file 1 of HPLC-DAD analysis of Hyssopus Cuspidatus Boriss extract and mensuration of its antioxygenation property
Creators: name: Zhao, Lu
name: Ji, Zhihong
name: Li, Keao
name: Wang, Bo
name: Zeng, Ya
name: Tian, Shuge
Publisher: name: figshare
Year: 2020
Subjects: subject: Biophysics
subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified
subject: Cancer

description: Additional file 1. : Ethical proof of animal experiment (PDF).
Pauli paramagnetism of triplet Cooper pairs in a nematic superconductor
Creators: name: Khokhlov, D. A.
name: Akzyanov, R. S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We investigate the response of a doped topological insulator Bi$_2$Se$_3$ with spin-triplet nematic superconductivity to external magnetization. We calculate the Zeeman part of magnetic susceptibility for nematic and chiral superconducting phases near T$_c$ in Ginzburg-Landau formalism. Superconducting order parameter from $E_u$ representation has non-trivial coupling with the transversal Zeeman field that results in a paramagnetic response to a magnetization. The topology of a Fermi surface has a strong influence on magnetic susceptibility. Lifshitz transition from closed to open Fermi surface eventually leads to phase transition from the nematic to chiral phase. At the transition point, magnetic susceptibility diverges. Also, we study the effects of the electron-electron interaction on the competition between nematic and chiral phases. We found that in a real system, electron-electron interaction can drive nematic to chiral phase only in the vicinity of the phase transition. We compare our results with the existing experimental data.
Large-scale Evaluation of Notebook Checkpointing with AI Agents
Creators: name: Fang, Hanxi
name: Chockchowwat, Supawit
name: Sundaram, Hari
name: Park, Yongjoo
Publisher: name: arXiv
Year: 2025
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Saving, or checkpointing, intermediate results during interactive data exploration can potentially boost user productivity. However, existing studies on this topic are limited, as they primarily rely on small-scale experiments with human participants - a fundamental constraint of human subject studies. To address this limitation, we employ AI agents to simulate a large number of complex data exploration scenarios, including revisiting past states and branching into new exploration paths. This strategy enables us to accurately assess the impact of checkpointing while closely mimicking the behavior of real-world data practitioners. Our evaluation results, involving more than 1,000 exploration paths and 2,848 executed code blocks, show that a checkpointing framework for computational notebooks can indeed enhance productivity by minimizing unnecessary code re-executions and redundant variables or code.
description: Extended Abstracts of the CHI Conference on Human Factors in Computing Systems, 2025, Yokohama, Japan
Reverse Engineering Variability in an Industrial Product Line: Observations and Lessons Learned
Creators: name: El-Sharkawy, Sascha
name: Jyoti, Dhar Saura
name: Krafczyk, Adam
name: Duszynski, Slawomir
name: Beichter, Tobias
name: Schmid, Klaus
Publisher: name: arXiv
Year: 2021
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Ideally, a variability model is a correct and complete representation of product line features and constraints among them. Together with a mapping between features and code, this ensures that only valid products can be configured and derived. However, in practice the modeled constraints might be neither complete nor correct, which causes problems in the configuration and product derivation phases. This paper presents an approach to reverse engineer variability constraints from the implementation, and thus improve the correctness and completeness of variability models. We extended the concept of feature effect analysis to extract variability constraints from code artifacts of the Bosch PS-EC large-scale product line. We present an industrial application of the approach and discuss its required modifications to handle non-Boolean variability and heterogeneous artifact types.
Connecting the Physical and Digital Worlds using IOT
Creators: name: Pratiksha Poddar
name: piyush kumar
name: shashank yadav
Publisher: name: Zenodo
Year: 2024
Subjects: Internet of Things
IoT
Digital Transformation

description: Title: Connecting the Physical and Digital Worlds using IoT

Authors: Pratiksha Poddar, Piyush Kumar, Shashank Yadav

Abstract:This paper provides a comprehensive overview of the Internet of Things (IoT), examining its foundational concepts, architectures, applications, and challenges. It explores how IoT connects physical devices to digital systems, revolutionizing industries, enhancing quality of life, and addressing societal challenges. The paper also discusses key considerations like security, privacy, and interoperability, and offers insights into future trends such as edge computing, AI integration, and blockchain.

Keywords: Internet of Things, IoT, Digital Transformation, Edge Computing, Security, Smart Cities.
Woodhouse Stables, Huntting Lane
Creators: name: Weber, Harvey A.
Publisher: name: Unknown
Year: 1970
Subjects: Photographs
Photos
Historic buildings
East Hampton
Structures
Dwellings
Woodhouse Family

description: This image shows the exterior of the Woodhouse Stables located on Huntting Lane from the viewpoint of inside a greenhouse. This image was taken by photographer Harvey A. Weber (1917-1991) and is part of the East Hampton’s Heritage Photo Collection.
description: Images within East Hampton Heritage Photo Collection seem to have been taken or collected in relation to the East Hampton Heritage project, but not all of them were included in the final publication. Several photographer are included in this collection.
Observations of shock propagation through turbulent plasma in the solar corona
Creators: name: Carley, Eoin P.
name: Cecconi, Baptiste
name: Reid, Hamish A.
name: Briand, Carine
name: Raja, Sasikumar
name: Masson, Sophie
name: Dorovskyy, Vladimir V.
name: Tiburzi, Caterina
name: Vilmer, Nicole
name: Zucca, Pietro
name: Zarka, Philippe
name: Tagger, Michel
name: Griessmeier, Jean-Mathias
name: Corbel, Stéphane
name: Theureau, Gilles
name: Loh, Alan
name: Girard, Julien
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Eruptive activity in the solar corona can often lead to the propagation of shock waves. In the radio domain the primary signature of such shocks are type II radio bursts, observed in dynamic spectra as bands of emission slowly drifting towards lower frequencies over time. These radio bursts can sometimes have inhomogeneous and fragmented fine structure, but the cause of this fine structure is currently unclear. Here we observe a type II radio burst on 2019-March-20th using the New Extension in Nançay Upgrading LOFAR (NenuFAR), a radio interferometer observing between 10-85 MHz. We show that the distribution of size-scales of density perturbations associated with the type II fine structure follows a power law with a spectral index in the range of $α=-1.7$ to -2.0, which closely matches the value of $-5/3$ expected of fully developed turbulence. We determine this turbulence to be upstream of the shock, in background coronal plasma at a heliocentric distance of $\sim$2 R$_{\odot}$. The observed inertial size-scales of the turbulent density inhomogeneities range from $\sim$62 Mm to $\sim$209 km. This shows that type II fine structure and fragmentation can be due to shock propagation through an inhomogeneous and turbulent coronal plasma, and we discuss the implications of this on electron acceleration in the coronal shock.
MPEC 2024-S180 : 2024 SD5
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 SD5

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Additional file 1 of Identifying and assessing the impact of key neighborhood-level determinants on geographic variation in stroke: a machine learning and multilevel modeling approach
Creators: name: Ji, Jiayi
name: Hu, Liangyuan
name: Liu, Bian
name: Li, Yan
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Neuroscience
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Science Policy

description: Additional file 1. R code for Fig. 3.
Reverse Engineering Code Dependencies: Converting Integer-Based Variability to Propositional Logic
Creators: name: Krafczyk, Adam
name: El-Sharkawy, Sascha
name: Schmid, Klaus
Publisher: name: arXiv
Year: 2021
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: A number of SAT-based analysis concepts and tools for software product lines exist, that extract code dependencies in propositional logic from the source code assets of the product line. On these extracted conditions, SAT-solvers are used to reason about the variability. However, in practice, a lot of software product lines use integer-based variability. The variability variables hold integer values, and integer operators are used in the conditions. Most existing analysis tools can not handle this kind of variability; they expect pure Boolean conditions. This paper introduces an approach to convert integer-based variability conditions to propositional logic. Running this approach as a preparation on an integer-based product line allows the existing SAT-based analyses to work without any modifications. The pure Boolean formulas, that our approach builds as a replacement for the integer-based conditions, are mostly equivalent to the original conditions with respect to satisfiability. Our approach was motivated by and implemented in the context of a real-world industrial case-study, where such a preparation was necessary to analyze the variability. Our contribution is an approach to convert conditions, that use integer variables, into propositional formulas, to enable easy usage of SAT-solvers on the result. It works well on restricted variables (i.e. variables with a small range of allowed values); unrestricted integer variables are handled less exact, but still retain useful variability information.
Fast Large-Scale Reionization Simulations
Creators: name: Thomas, Rajat M.
name: Zaroubi, Saleem
name: Ciardi, Benedetta
name: Pawlik, Andreas H.
name: Labropoulos, Panagiotis
name: Jelic, Vibor
name: Bernardi, Gianni
name: Brentjens, Michiel A.
name: de Bruyn, A. G.
name: Harker, Geraint J. A.
name: Koopmans, Leon V. E.
name: Mellema, Garrelt
name: Pandey, V. N.
name: Schaye, Joop
name: Yatawatta, Sarod
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present an efficient method to generate large simulations of the Epoch of Reionization (EoR) without the need for a full 3-dimensional radiative transfer code. Large dark-matter-only simulations are post-processed to produce maps of the redshifted 21cm emission from neutral hydrogen. Dark matter haloes are embedded with sources of radiation whose properties are either based on semi-analytical prescriptions or derived from hydrodynamical simulations. These sources could either be stars or power-law sources with varying spectral indices. Assuming spherical symmetry, ionized bubbles are created around these sources, whose radial ionized fraction and temperature profiles are derived from a catalogue of 1-D radiative transfer experiments. In case of overlap of these spheres, photons are conserved by redistributing them around the connected ionized regions corresponding to the spheres. The efficiency with which these maps are created allows us to span the large parameter space typically encountered in reionization simulations. We compare our results with other, more accurate, 3-D radiative transfer simulations and find excellent agreement for the redshifts and the spatial scales of interest to upcoming 21cm experiments. We generate a contiguous observational cube spanning redshift 6 to 12 and use these simulations to study the differences in the reionization histories between stars and quasars. Finally, the signal is convolved with the LOFAR beam response and its effects are analyzed and quantified. Statistics performed on this mock data set shed light on possible observational strategies for LOFAR.
description: 18 pages, 21 figures, submitted to MNRAS For high-resolution images follow "http://www.astro.rug.nl/~thomas/eormap.pdf"
Computing expected transition events in reducible Markov chains
Creators: name: Ewald, Brian D.
name: Humpherys, Jeffrey
name: West, Jeremy
Publisher: name: arXiv
Year: 2008
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60J22, 15A09

description: We present a closed-form, computable expression for the expected number of times any transition event occurs during the transient phase of a reducible Markov chain. Examples of events include time to absorption, number of visits to a state, traversals of a particular transition, loops from a state to itself, and arrivals to a state from a particular subset of states. We give an analogous expression for time-average events, which describe the steady-state behavior of reducible chains as well as the long-term behavior of irreducible chains.
description: 15 pages, 1 table. Added numerical analysis and changed formatting. Fixed several errors
Open comments on the Task Force SIRS report: Scholarly Infrastructures for Research Software (EOSC Executive Board, EOSCArchitecture)
Creators: name: Gomez-Diaz, Teresa
name: Recio, Tomas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Digital Libraries (cs.DL)
subject: FOS: Computer and information sciences

description: The goal of this document is to openly contribute with our comments to the EOSCArchitecture report: Scholarly Infrastructures for Research Software (SIRS), and thus, to participate in the European Open Science Cloud (EOSC) architecture design.
Postmigrantische Stadt: Eine neue Topographie des Möglichen
Creators: name: Yildiz, Erol
name: Berner, Heiko
Publisher: name: Zeitschrift für Migrationsforschung
Year: 2021

description: Sozio-historische Studien legen nahe, dass der Topos einer Sesshaftigkeit über mehrere Generationen hinweg ein Mythos ist. Vor allem Städte wären ohne Migration kaum denkbar. Migration, Stadtentwicklung und Urbanität werden in diesem Artikel aus einer Perspektive betrachtet, die wir als postmigrantisch bezeichnen. ›Stadt ist Migration, Stadt ist Vielheit‹ sind die Grundgedanken, die der postmigrantischen Idee zugrunde liegen. Etablierte Gewissheiten werden gegen den Strich gelesen, hegemoniale Vorstellungen aus der Perspektive und Erfahrung der Migration neu gedacht. Migration wird nicht mehr als Sonderobjekt der Forschung, als gesellschaftliches Randphänomen betrachtet, sondern ins Zentrum gerückt und zum Ausgangspunkt weiterer Analysen gemacht. Dies soll am Beispiel der postmigrantischen Ökonomie diskutiert werden. Anhand von Fallbeispielen aus Salzburg wird die Relevanz aufgezeigt, die soziale Kontakte und die Aktivierung grenzüberschreitender Ressourcen für Gründung und Nachhaltigkeit eines Unternehmens haben können. Postmigrant City: A New Topography of the Possible Socio-historical studies suggest that sedentariness over several generations is a myth. Cities in particular would be unthinkable without migration. Migration, urban development and urbanity are considered in this article from a perspective that we call post-migrant. ›City is migration, city is multiplicity‹ are the basic ideas underlying the postmigrant idea. Established certainties are read against the grain, hegemonic ideas are rethought from the perspective and experience of migration. Migration is no longer regarded as a special object of research, as a marginal social phenomenon, but is instead placed at the centre and made the starting point for further analyses. This will be discussed using the example of post-migrant economy. Case studies from Salzburg will be used to demonstrate the relevance that social contacts and the activation of cross-border resources can have for the establishment and sustainability of a business.
description: Zeitschrift für Migrationsforschung, Bd. 1 Nr. 1 (2021): Stand, Herausforderungen und Perspektiven der Migrationsforschung
Quo vadis, Migration Studies? The Quest for a Migratory Epistemology
Creators: name: Düvell, Franck
Publisher: name: Journal of Migration Studies
Year: 2021

description: This article starts by sketching the links between changing mobility and migration patterns, processes of social transformation, corresponding migration control policies, and related perceptions of social problems. It acknowledges that since the 1980s in the US and the 1990s in Europe, migration studies have come of age, bringing about a plethora of typologies, concepts, and theories. However, the knowledge production of migration studies is haunted by a range of frustrations, including unconvincing definitions, lack of data, reductionism, short-range theories, often biased research funding practices, usually negative public and political discourse, and an underlying dominant perspective of the nation-state and thus an omnipresent sedentary bias. In contrast, this article offers some cornerstones of reflexive migration studies and drafts a migratory epistemology that takes inspiration from feminist and postcolonial epistemologies, resting on complexity thinking and acknowledging key intersectionalities while being rooted in thorough ethical reflections so as to contemplate the (re)politization of research. Wie weiter mit der Migrationsforschung? Auf der Suche nach einer migratorischen Erkenntnistheorie Dieser Artikel beginnt mit einer Skizze des Zusammenhangs von Mobilitäts und Migrationsmustern, Prozessen sozialen Wandels sowie damit verbundenen Migrationskontrollpolitiken und Wahrnehmungen sozialer Probleme. Er würdigt, dass die Migrationsforschung seit den 1980er Jahren in den USA und seit den 1990er Jahren in Europa erwachsen geworden ist und zahlreiche Typologien, Konzepte und Theorien hervorgebracht hat. Dennoch ist die Wissensproduktion gekennzeichnet durch eine frustrierende Reihe von wenig überzeugenden Definitionen, einen Mangel an Daten, zu kurz greifende Theorien, oftmals voreingenommene Forschungsförderpraktiken, meist negativ konnotierte öffentliche und politische Diskursen, eine den Betrachtungen zugrunde liegende Fokussierung auf den Nationalstaat sowie die allgegenwärtige Vorstellung von der Sesshaftigkeit als gesellschaftlicher Normalität. Alternativ dazu greift dieser Beitrag einige Kernideen reflexiver Migrationsstudien auf und skizziert eine migratorische Erkenntnistheorie, welche Anregungen aus feministischen und postkolonialen Erkenntnistheorien aufgreift, auf ›complexity thinking‹ beruht sowie wesentliche Intersektionalitäten anerkennt. Sie ist zugleich ethisch grundiert und berücksichtigt auch die (Re)Politisierung von Forschung.
description: Journal of Migration Studies, Bd. 1 Nr. 1 (2021): Stand, Herausforderungen und Perspektiven der Migrationsforschung
Perspektiven der ethnographischen Grenzregimeforschung: Grenze als Konfliktzone
Creators: name: Hess, Sabine
name: Schmidt-Sembdner, Matthias
Publisher: name: Zeitschrift für Migrationsforschung
Year: 2021

description: In den vergangenen Jahren wurden wir Zeug*innen einer verstärkten Wiederkehr nationaler und regionaler Grenzapparaturen auf dem europäischen Kontinent: Zäune, Gräben, Wachtürme, Lager und weitere technologische Apparate sowie gezielte Rechtsverletzungen prägen die derzeitigen Stabilisierungsversuche des europäischen Grenzregimes nach dem ›langen Sommer der Migration‹ 2015. Im Zuge dessen werden die unterschiedlichen Regierungstechnologien und Paradigmen, welche den konfliktiven Aushandlungsprozess des EU-europäischen Grenzregimes in den vergangenen Jahrzehnten geformt haben, einem Wandel unterzogen und neu justiert. Mit Blick auf diesen Prozess des europäischen ›Re-Borderings‹ widmet sich der vorliegende Beitrag zunächst der Frage, wie die Grenze in Bezug auf die Migrationskontrolle in den internationalen ›border studies‹ in den vergangenen Jahren gedacht wurde. Mit den Ausführungen zur These der ›Autonomie der Migration‹ und dem Verständnis von Migration als konstitutive Kraft für gesellschaftliche Transformationsprozesse zeigt der Beitrag weiter, wie uns die Perspektive der Migration bereits Anfang der 2000er Jahre dazu brachte, die Analytik und Methodologie der ethnographischen Grenzregimeanalyse zu konzipieren. Perspectives of Ethnographic Border Regime Research: Border as Conflict Zone In recent years we have witnessed an increased recurrence of national and regional border apparatuses on the European continent: fences, ditches, watchtowers, camps, and other technological devices as well as deliberate legal violations characterize the current attempts of stabilizing the European border regime after the long summer of migration in 2015. During these, the different governmental technologies and paradigms that have shaped the conflictive negotiation process of the EU-European border regime over the past decades, are modified and readjusted. Regarding this process of European re-bordering, this article will first address the question of how the border has been conceived in relation to migration control within the international border studies in recent years. Referring to the thesis of the ›autonomy of migration‹ and the understanding of migration as a constitutive force for social transformation processes, the article further shows how the perspective of migration inspired us to conceive the analytics and methodology of ethnographic border regime analysis back in the early 2000s.
description: Zeitschrift für Migrationsforschung, Bd. 1 Nr. 1 (2021): Stand, Herausforderungen und Perspektiven der Migrationsforschung
Grenze, Bewegung, Beunruhigung. Skizze einer zugehörigkeitstheoretisch informierten Migrationsforschung
Creators: name: Geier, Thomas
name: Mecheril, Paul
Publisher: name: Zeitschrift für Migrationsforschung
Year: 2021

description: Migrationsbewegungen irritieren die mit symbolischen, strukturellen, rechtlichen sowie territorialen Grenzen verbundenen und von diesen hervorgebrachten Zugehörigkeitsordnungen. Aus diesem Grund sind Krisendiskurse Kennzeichen migrationsgesellschaftlicher Wirklichkeit. Ein empirisch wirksamer migrationsgesellschaftlicher Krisendiskurs greift auf den Topos der Bedrohung zurück. Der Bedrohungsdiskurs ist kennzeichnend für öffentliche Verhandlungen von Migration, weil in diesem die Gefährdung der vorherrschenden Zugehörigkeitsordnung plausibel gemacht und gleichzeitig regulative Krisenlösungsverfahren auf den Weg gebracht werden können. Dort, wo sich Krisendeutungen etwa mit Hilfe von bedrohungsinszenierungen herausprägen, werden Zugehörigkeitsordnungen durchgesetzt. Border, Movement, Disquiet. Migration Research in the Framework of Belonging Theory Migration movements disquiet the orders of belonging associated with and generated by symbolic, structural, legal and territorial borders. For this reason, crisis discourses are significant for societal reality shaped by migration. An important discourse on crisis regarding migration falls back on the topic of the threat. The discourse of threat is characteristic of public negotiations on migration, because in this discourse the threat to the dominant order of belonging can be made plausible and at the same time regulatory resolution procedures can be initiated. Wherever crisis interpretations prevail, for example with the help of staged threats, orders of belonging are enforced.
description: Zeitschrift für Migrationsforschung, Bd. 1 Nr. 1 (2021): Stand, Herausforderungen und Perspektiven der Migrationsforschung
Migrationssoziologie im 21. Jahrhundert: Aus der Randständigkeit in die Mitte der Disziplin
Creators: name: Pries, Ludger
Publisher: name: Zeitschrift für Migrationsforschung
Year: 2021

description: Migrationsforschung hat sich im deutschsprachigen Raum qualitativ und quantitativ sehr stark entwickelt. Die Migrationssoziologie differenziert sich bezüglich behandelter Themenfelder und konzeptionell aus und kann einen bedeutsamen Beitrag zur Sozialtheorie generell leisten. Sie kann die im Zuge von Globalisierung bedeutsamer werdende internationale Arbeitsmobilität ebenso theoretisch und empirisch erfassen wie die migrationsbezogenen Zugehörigkeitsmechanismen und Bezeichnungspolitiken. Sie unterstützt die Überwindung klassischer Dualismen wie Sozial- und Systemintegration, freiwillige und erzwungene Migration, Nation und Ethnizität. Sie leistet schließlich einen Beitrag, jenseits des methodologischen Nationalismus Migration als genuinen Bestandteil menschlicher Lebenspraxis, als ergebnisoffenen, über mehrere Generationen fragilen und veränderbaren Prozess der Rekonstruktion von wechselseitigen Selbst- und Fremdzuordnungen und mehrdimensionalen Teilhabemustern zu untersuchen. Migration Sociology in the 21st Century: From the Margins to the Center of the Discipline Migration research increased in the German speaking area in qualitative and quantitative terms. Sociology of Migration differentiates according to thematic fields and conceptual approaches and contributes more and more to general social theory. In the globalization process, it can conceptualize transnational labor mobility as well as corresponding social mechanisms of belonging and categorizing. Migration Sociology helps to overcome classic dualisms like social and system integration, voluntary and forced migration or ethnicity and nation. Beyond methodological nationalism it facilitates to understand migration as a genuine part of human social practice, as an open-ended and for generations fragile and reversible process of reconstructing social attributions to oneself and others and of multi-dimensional participation in social entanglements.
description: Zeitschrift für Migrationsforschung, Bd. 1 Nr. 1 (2021): Stand, Herausforderungen und Perspektiven der Migrationsforschung
Mixed Alkali-Ion Transport and Storage in Atomic-Disordered Honeycomb Layered $\rm NaKNi_2TeO_6$
Creators: name: Masese, Titus
name: Miyazaki, Yoshinobu
name: Rizell, Josef
name: Kanyolo, Godwill Mbiti
name: Chen, Chih-Yao
name: Ubukata, Hiroki
name: Kubota, Keigo
name: Sau, Kartik
name: Ikeshoji, Tamio
name: Huang, Zhen-Dong
name: Yoshii, Kazuki
name: Takahashi, Teruo
name: Ito, Miyu
name: Senoh, Hiroshi
name: Hwang, Jinkwang
name: Alshehabi, Abbas
name: Matsumoto, Kazuhiko
name: Matsunaga, Toshiyuki
name: Fujii, Kotaro
name: Yashima, Masatomo
name: Shikano, Masahiro
name: Tassel, Cédric
name: Kageyama, Hiroshi
name: Uchimoto, Yoshiharu
name: Hagiwara, Rika
name: Saito, Tomohiro
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Honeycomb layered oxides constitute an emerging class of materials that show interesting physicochemical and electrochemical properties. However, the development of these materials is still limited. Here, we report the combined use of alkali atoms ($\rm Na$ and $\rm K$) to produce a mixed alkali honeycomb layered oxide material, namely, $\rm NaKNi_2TeO_6$. Via transmission electron microscopy measurements, we reveal the local atomic structural disorders characterised by aperiodic stacking and incoherency in the alternating arrangement of $\rm Na$ and $\rm K$ atoms. We also investigate the possibility of mixed electrochemical transport and storage of $\rm Na$ and $\rm K$ ions in $\rm NaKNi_2TeO_6$. In particular, we report an average discharge cell voltage of about $4\, \rm V$ and a specific capacity of around $80\, \rm mAh\, g^{-1}$ at low specific currents (i.e., $< 10\, \rm mA\, g^{-1}$) when a $\rm NaKNi_2TeO_6$-based positive electrode is combined with a room-temperature $\rm NaK$ liquid alloy negative electrode using an ionic liquid-based electrolyte solution. These results represent a step towards the use of tailored cathode active materials for dendrite-free electrochemical energy storage systems exploiting room-temperature liquid alkali metal alloy materials.
description: 39 Pages, 7 Figures, 1 Cover Art
On the asymptotics of moments of linear random recurrences
Creators: name: Marynych, Alexander
Publisher: name: arXiv
Year: 2009
Subjects: subject: Probability (math.PR)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics

description: We propose a new method of analyzing the asymptotics of moments of certain linear random recurrences which is based on the technique of iterative functions. By using the method, we show that the moments of the number of collisions and the absorption time in the Poisson-Dirichlet coalescent behave like the powers of the "log star" function which grows slower than any iteration of the logarithm, and thereby prove a weak law of large numbers. Finally, we discuss merits and limitations of the method and give several examples related to beta coalescents, recursive algorithms and random trees.
description: 22 pages, 1 figure
Zwischen common ground und Multiperspektivität: Überlegungen zu Stand und Perspektiven der Migrationsforschung
Creators: name: Schammann, Hannes
Publisher: name: Zeitschrift für Migrationsforschung
Year: 2021

description: Migrationsforschung lebt von ihrer Multiperspektivität. Sie könnte daher von einer stärkeren gemeinsamen Reflexion der beteiligten Disziplinen profitieren, um einen qualitätsvollen disziplinübergreifenden Resonanzraum für Forschungsergebnisse zu schaffen, den es so weiterhin zu selten gibt. Der Beitrag schlägt dazu drei Felder der Reflexion vor: Erstens diskutiert er die Frage nach einer Disziplinierung oder Kanonisierung der Migrationsforschung. Dabei plädiert er für die Herausbildung eines dynamischen zweistufigen Kanons, der sowohl disziplinübergreifend als auch disziplingebunden sein sollte. Der zweite Abschnitt widmet sich dem Dialog über normativepistemologisch bedingte Konfliktlinien hinweg. Hier fordert der Text insbesondere einen verstärkten Austausch zwischen akademisch und praktisch orientierten sowie zwischen traditionelleren und kritischen Perspektiven. Drittens werden Verzerrungen im Forschungsdesign empirischer Arbeiten thematisiert und am Beispiel der Fallauswahl bei der Erforschung lokaler Migrationspolitik kartiert. Der Beitrag fordert in diesem Zusammenhang eine stärkere Reflexion empirischer Forschungsdesigns und schließt damit an eine international geführte Diskussion an. Reflecting Multiperspectivity: Thoughts on Migration Studies in Germany Migration studies relies strongly on its multiperspectivity. However, the disciplines involved still fall short in jointly reflecting on common quality standards. The paper therefore proposes three areas for further exchange between migration scholars with different academic backgrounds. Firstly, it encircles the question to what extent migration studies should claim to be an academic discipline on its own. The paper argues that, instead of establishing an original discipline, migration studies might be better off following the path of a two-fold ›canonization‹ with a transdisciplinary and a disciplinary (e.g. political science, sociology, history) core that both consist of certain academic debates and axioms. Secondly, the paper identifies three normative and epistemological cleavages within (German) migration scholary. It advocates for more dialogue beyond the distinct perspectives. Thirdly, the contribution joins the international debate on reflectivity in migration studies when it comes to research designs. Practically, it focuses on five types of biases in the case selection process in studies on local migration policy: urban bias, progressive bias, extreme case bias, residence bias, and paternalistic bias.
description: Zeitschrift für Migrationsforschung, Bd. 1 Nr. 1 (2021): Stand, Herausforderungen und Perspektiven der Migrationsforschung