cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Study on dynamic variation of acid-base properties of coal and its influence on environment during oxidation and heating
Creators: name: Gao, Liyang
name: Tan, Bo
name: Huang, Jiliang
name: Huang, Xiaoqing
name: Wang, Haiyan
name: Lu, Wei
name: Kong, Biao
name: Li, Xiaomeng
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Pharmacology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified

description: The spontaneous combustion of coal poses a serious threat to production and environmental safety. Currently, scholars have conducted extensive research on the mechanisms and prevention methods of coal spontaneous combustion. However, these studies have not sufficiently addressed the changes in coal’s acid-base properties during combustion and their impact on environmental pH balance. This gap hinders a comprehensive understanding of coal combustion and precise fire suppression. This study focuses on the changes in the acid-base properties of coal during critical periods of spontaneous combustion prevention. The results showed that as the temperature increased, BJG becomes more alkaline, with a pH of 8.08 at 75°C, while HLS becomes more acidic, with a pH as low as 5.14. The aqueous solutions mainly contained SO42-, CO32-, and HCO3−, with the SO42- concentration in HLS being about 200 times higher than in BJG. Additionally, this study innovatively analyzed the impact of organic substances on the acid-base properties of coal. It was found that the content of organic groups, mainly -COOH, increased by over 300%. However, the influence of pyrite is greater than that of organic acids and CO2. Furthermore, the consumption of H+ by minerals significantly reduces the acidity of the solution. (1) At present, the acid-base research on coal spontaneous combustion mainly focuses on the influence of external acid-base conditions oncoal composition, pore structure and oxidation combustion activity. This paper innovatively studies the change of acid-base properties ofcoal during spontaneous combustion and its impact on the environment. (2) The organic and inorganic components which affect PH value of aqueous solution are discussed and compared. The macroscopic manifestation of pH change is related to the microscopic evolution of coal. (3) This paper provides a new idea for the field of coal spontaneous combustion monitoring and early warning, accurate and efficient prevention and control, fills and enriches some theories, and has certain practical guiding significance.
Global phase diagram, possible chiral spin liquid and topological superconductivity in the triangular Kitaev-Heisenberg model
Creators: name: Li, Kai
name: Yu, Shun-Li
name: Li, Jian-Xin
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The possible ground states of the undoped and doped Kitaev-Heisenberg model on a triangular lattice are studied. For the undoped system, a combination of the numerical exact diagonalization calculation and the four-sublattice transformation analysis suggests one possible exotic phase and four magnetically ordered phases including a collinear stripe pattern and a noncollinear spiral pattern in the global phase diagram. The exotic phase near the antiferromagnetic (AF) Kitaev point is further investigated by using the Schwinger-fermion mean-field method, and we obtain an energetically favorable $Z_2$ chiral spin liquid with a Chern number $\pm2$ as a promising candidate. At finite doping, we find that the AF Heisenberg coupling supports an $s$-wave or a $d_{x^2-y^2}+id_{xy}$-wave superconductivity (SC), while the AF and the ferromagnetic Kitaev interactions favor a $d_{x^2-y^2}+id_{xy}$-wave SC and a time-reversal invariant topological $p$-wave SC, respectively. Possible experimental realizations and related candidate materials are also discussed.
description: Published version: References updated, and the electron doped phase diagram was added
Development of an Interpretive Simulation Tool for the Proton Radiography Technique
Creators: name: Levy, M. C.
name: Ryutov, D. D.
name: Wilks, S. C.
name: Ross, J. S.
name: Huntington, C. M.
name: Fiuza, F.
name: Martinez, D. A.
name: Kugland, N. L.
name: Baring, M. G.
name: Park, H-. S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Proton radiography is a useful diagnostic of high energy density (HED) plasmas under active theoretical and experimental development. In this paper we describe a new simulation tool that interacts realistic laser-driven point-like proton sources with three dimensional electromagnetic fields of arbitrary strength and structure and synthesizes the associated high resolution proton radiograph. The present tool's numerical approach captures all relevant physics effects, including effects related to the formation of caustics. Electromagnetic fields can be imported from PIC or hydrodynamic codes in a streamlined fashion, and a library of electromagnetic field `primitives' is also provided. This latter capability allows users to add a primitive, modify the field strength, rotate a primitive, and so on, while quickly generating a high resolution radiograph at each step. In this way, our tool enables the user to deconstruct features in a radiograph and interpret them in connection to specific underlying electromagnetic field elements. We show an example application of the tool in connection to experimental observations of the Weibel instability in counterstreaming plasmas, using $\sim 10^8$ particles generated from a realistic laser-driven point-like proton source, imaging fields which cover volumes of $\sim10 $ mm$^3$. Insights derived from this application show that the tool can support understanding of HED plasmas.
description: Figures and tables related to the Appendix are included in the published journal article
Cell cycle regulated expression of the WHI7 Start repressor gene
Creators: name: Ros-Carrero, Cristina
name: Gomar-Alba, Mercè
name: Igual, J. Carlos
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Biophysics
subject: Biochemistry
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Genetics
subject: Molecular Biology
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: Hematology
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: Periodic transcriptional waves along the cell cycle ensure the accurate progression of the different cell cycle phases through the timely regulated expression of cell cycle proteins. The G1/S transition (Start) consists in the activation of a transcriptional program by G1 CDKs through the inactivation of Start transcriptional repressors, Whi5 and Whi7 in yeast or Rb in mammals. Here, we provide a comprehensive characterization of the transcriptional regulation of the Start repressor Whi7 in budding yeast. We found that WHI7 is a cell cycle regulated gene that shows periodic expression peaking in G1. Our results demonstrate that the three cell cycle transcriptional programs related to G1 and their corresponding transcription factors are involved in the transcriptional control of WHI7. Specifically, we identified that the transcriptional regulators Swi5 and Mcm1-Yox1, which are involved in late M and early G1 expression, and the transcription factors MBF and SBF, which are responsible for G1/S expression, are able to associate and regulate the WHI7 gene. In summary, in this work, we provide new mechanisms for the regulation of the Start repressor Whi7, which highlights the precise and complex control of the cell cycle machinery governing the G1/S transition.
Control of $^{164}$Dy Bose-Einstein condensate phases and dynamics with dipolar anisotropy
Creators: name: Halder, S.
name: Mukherjee, K.
name: Mistakidis, S. I.
name: Das, S.
name: Kevrekidis, P. G.
name: Panigrahi, P. K.
name: Majumder, S.
name: Sadeghpour, H. R.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Pattern Formation and Solitons (nlin.PS)
subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the quench dynamics of quasi-one and two dimensional dipolar Bose-Einstein condensates (dBEC) of $^{164}$Dy atoms under the influence of a fast rotating magnetic field. The magnetic field thus controls both the magnitude and sign of the dipolar potential. We account for quantum fluctuations, critical to formation of exotic quantum droplet and supersolid phases in the extended Gross-Pitaevskii formalism, which includes the so-called Lee-Huang-Yang (LHY) correction. An analytical variational ansatz allows us to obtain the phase diagrams of the superfluid and droplet phases. The crossover from the superfluid to the supersolid phase and to single and droplet arrays is probed with particle number and dipolar interaction. The dipolar strength is tuned by rotating the magnetic field with subsequent effects on phase boundaries. Following interaction quenches across the aforementioned phases, we monitor the dynamical formation of supersolid clusters or droplet lattices. We include losses due to three-body recombination over the crossover regime, where the three-body recombination rate coefficient scales with the fourth power of the scattering length ($a_s$) or the dipole length ($a_{dd}$). For fixed values of the dimensionless parameter, $ε_{dd} = a_{dd}/a_s$, tuning the dipolar anisotropy leads to an enhancement of the droplet lifetimes.
description: 16 pages, 12 figures
title: Eine kontrastive Vermittlung des Artikels
Creators: name: Track, Florian
Year: 2022

description: Dass Deutschlernende, deren L1 keine Artikel kennt, häufig Schwierigkeiten mit der Artikelsetzung haben, ist nicht neu (Böttger 2008; Pimingsdorfer 2013). Dass es aber für die deutschen Artikel etwa im Russischen, also einer artikellosen Sprache, sehr wohl Entsprechungen gibt, zeigte bereits Gladrow (1998) in seiner deutsch-russisch kontrastiven Arbeit. Hierbei stellt sich die Frage, ob diese Entsprechungen auch didaktisch verwertbar sind, um russischsprachige Deutschlernende beim Artikelgebrauch zu unterstützen. Das wesentliche Ziel dieser Arbeit besteht darin, zu zeigen, wie Gladrows deutsch-russischer Vergleich der Determination des Substantivs im Unterricht eingesetzt werden kann. Die dafür erstellten Übungen wurden an der Burjatischen Staatlichen Universität erprobt und anschließend sowohl von den Studierenden als auch den Lehrpersonen evaluiert. Die Reaktionen auf diesen sprachvergleichenden Ansatz waren überwiegend positiv, teilweise wurde das vorausgesetzte Vorwissen über die russische Grammatik kritisiert. Ebenso zeigte sich, dass die primären Schwierigkeiten mit der Artikelsetzung in anderen Sprachbereichen zu verorten sind.
description: The fact that learners of German as a foreign language whose L1 has no articles have some difficulties with the correct use of articles is well researched: the studies of Böttger (2008) or Pimingsdorfer (2013) have elaborated on this. However, Gladrow (1998) showed in his comparison of German and Russian that there are indeed equivalents of the German article in the Russian language. This inevitably leads to the question, whether there are ways to use these equivalents didactically to help Russian-speaking learners of German as a foreign language with the correct use of articles. This work aims at showing how Gladrow’s comparison of the determination of the noun can be used in class. The exercises created for this purpose were used at the Buryat State University and subsequently evaluated by the students and the teachers. The reactions on this comparative approach were predominantly positive, although in some cases the presupposed knowledge of Russian grammar was criticized. It also became apparent that the main difficulties of Russian-speaking learners of German lie primarily in other language areas.
Statistical inference for Bures--Wasserstein barycenters
Creators: name: Kroshnin, Alexey
name: Spokoiny, Vladimir
name: Suvorikova, Alexandra
Publisher: name: Weierstrass Institute
Year: 2020
Subjects: subject: Bures-Wasserstein barycenters
subject: central limit theorem
subject: optimal transport
subject: 60F05

description: In this work we introduce the concept of Bures--Wasserstein barycenter $Q_*$, that is essentially a Fréchet mean of some distribution $P$ supported on a subspace of positive semi-definite $d$-dimensional Hermitian operators $H_+(d)$. We allow a barycenter to be constrained to some affine subspace of $H_+(d)$, and we provide conditions ensuring its existence and uniqueness. We also investigate convergence and concentration properties of an empirical counterpart of $Q_*$ in both Frobenius norm and Bures--Wasserstein distance, and explain, how the obtained results are connected to optimal transportation theory and can be applied to statistical inference in quantum mechanics.
A Machine Learning Approach to Classify Vortex Wakes of Energy Harvesting Oscillating Foils
Creators: name: Ribeiro, Bernardo Luiz R.
name: Franck, Jennifer A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: A machine learning model is developed to establish wake patterns behind oscillating foils whose kinematics are within the energy harvesting regime. The role of wake structure is particularly important for array deployments of oscillating foils, since the unsteady wake highly influences performance of downstream foils. This work explores 46 oscillating foil kinematics, with the goal of parameterizing the wake based on the input kinematic variables and grouping vortex wakes through image analysis of vorticity fields. A combination of a convolutional neural network (CNN) with long short-term memory (LSTM) units is developed to classify the wakes into three groups. To fully verify the physical wake differences among foil kinematics, a convolutional autoencoder combined with k-means++ clustering is utilized and four different wake patterns are found. With the classification model, these patterns are associated with a range of foil kinematics. Future work can use these correlations to predict the performance of foils placed in the wake and build optimal foil arrangements for tidal energy harvesting.
description: 25 pages, 15 figures, Accepted to be published at AIAA Journal. arXiv admin note: text overlap with arXiv:2108.02269
Quasineutral limit, dispersion and oscillations for Korteweg type fluids
Creators: name: Donatelli, Donatella
name: Marcati, Pierangelo
Publisher: name: arXiv
Year: 2014
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: Primary 35L65, Secondary 35L40, 76R50

description: In the setting of general initial data and whole space we perform a rigorous analysis of the quasineutral limit for a hydrodynamical model of a viscous plasma with capillarity tensor represented by the Navier Stokes Korteweg Poisson system. We shall provide a detailed mathematical description of the convergence process by analyzing the dispersion of the fast oscillating acoustic waves. However the standard acoustic wave analysis is not sufficient to control the high frequency oscillations in the electric field but it is necessary to estimates the dispersive properties induced by the capillarity terms. Therefore by using these additional estimates we will be able to control, via compensated compactness, the quadratic nonlinearity of the stiff electric force field. In conclusion, opposite to the zero capillarity case \cite{DM12} where persistent space localized time high frequency oscillations need to be taken into account, we show that as $λ\to 0$, the density fluctuation $ρ^λ-1$ converges strongly to zero and the fluids behaves according to an incompressible dynamics.
description: Updated to author's accepted manuscript
Experiental Civic Learning by using "Projekt: Aktive Bürger"
Creators: name: Koopmann, Klaus
Publisher: name: JSSE - Journal of Social Science Education
Year: 2003

description: Various social and political developments seem to sum up to a process of 'de-civilization' which impede - rather than facilitate - the project of a humane and democratic society. In order to make this project a successful one it is necessary to reclaim citizens as politically acting subjects. The ability to act as enlightened and autonomous citizens will be sustainably acquired by experiencing extensive participation in society and in politics. Civic education should foster this process of 'revi-talization of citizenship' by offering youth meaningful participatory experiences of social and po-litical relevance. That is: Civic education should create, organize and offer learning strategies that are oriented towards the notion of reflective acting as experiential learning. Experiential learning processes, aimed at the sustainable acquisition of competencies which are relevant in politics and civil society, will particularly unfold in the course of the (inter)active dealing of the individual(s) with the authentic political and social problems and processes that surround and concern them. This also includes reflection and co-operation. One example of how to practice an experiential and prob-lem-centred learning strategy is well being demonstrated by the civic education program "Projekt: Aktive Bürger", the German adaptation of "We the People ... Project Citizen" designed by the American Center for Civic Education.
description: JSSE - Journal of Social Science Education, 2-2002: Civic and Economic Education in Europe
Splitting subspaces and a finite field interpretation of the Touchard-Riordan Formula
Creators: name: Prasad, Amritanshu
name: Ram, Samrith
Publisher: name: arXiv
Year: 2022
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: G.2.1
subject: 05A15, 05A19, 33C45

description: We enumerate the number of $T$-splitting subspaces of dimension $m$ for an arbitrary operator $T$ on a $2m$-dimensional vector space over a finite field. When $T$ is regular split semisimple, comparison with an alternate method of enumeration leads to a new proof of the Touchard-Riordan formula for enumerating chord diagrams by their number of crossings.
description: 15 pages
title: Pflanzen-Tier-Interaktionen am Beispiel ausgewählter Alkaloide mit Fokus auf Bestäubung
Creators: name: Kohler, Veronika
Year: 2022

description: Die allgemeine Wahrnehmung von sekundären Pflanzenstoffen ist stark auf ihre praktische Anwendung beschränkt. Wir Menschen kennen sie bestenfalls als Duftstoffe, Giftstoffe oder Farbstoffe, und nutzen sie oft unbewusst alltäglich als Heilmittel, Genussmittel, Farb- und Aromastoffe, Pflanzenschutzmittel etc. Dass sekundäre Pflanzenstoffe jedoch vielfältige Funktionen für Pflanzen übernehmen können und ökologische Beziehungen wesentlich beeinflussen, ist meist unbekannt. So spielen diese Stoffe eine wesentliche Rolle, nicht nur bei der Verteidigung der Pflanze, sondern auch zur Anlockung etwa von Bestäubern. Trotz ihrer großen Bedeutung für Pflanze und Mensch werden sekundäre Pflanzenstoffe bisher nur in geringem Ausmaß in den österreichischen AHS-Lehrplänen berücksichtigt. Die vorliegende Arbeit basiert auf einer umfassenden wissenschaftlichen Literaturrecherche und beschäftigt sich mit der Rolle von ausgewählten Alkaloiden bei der Bestäubung. Ein besonderes Augenmerk liegt dabei auf den Alkaloiden Coffein, Aconitin und Nicotin. Zunächst wird auf morphologische Merkmale der Angiospermen und deren Bestäubungsbiologie näher eingegangen. Außerdem werden die Funktionen sekundärer Pflanzenstoffe und die wesentlichen Stoffklassen erläutert. Der Hauptteil der Arbeit besteht aus der Vorstellung der drei Beispielalkaloide und deren Einfluss auf Bestäubungsprozesse. Das ökologische Modellsystem „Nicotiana attenuata“ wird in Hinblick auf die Rolle der Sekundärstoffe in Verteidigung und Bestäubung beispielhaft diskutiert. Darüber hinaus werden Unterrichtsmaterialien im Umfang von sieben Schulstunden zum Thema sekundäre Pflanzenstoffe für eine 5. Klasse AHS-Oberstufe erstellt. Diese basieren auf den vorangegangenen theoretischen Ausführungen und orientieren sich an aktuellen didaktischen Grundsätzen des Lehrplans. So werden die Inhalte in Form von interaktiven Aufgaben vermittelt, wodurch Schülerinnen und Schüler in ihrer Eigenständigkeit gestärkt werden.
BASIC ELEMENTS OF THE QUASI-KEPLERIAN THEORY OF ACCRETION
Creators: name: HABUMUGISHA Isaac
Publisher: name: Zenodo
Year: 2022
Subjects: Azimuthal velocity, Radial velocity, Disc temperature, Magnetic field

description: Abstracts Modern astronomy observations have discovered fascinating features that cannot be easily explained. Consequently, researchers frequently develop models that eventually explain the observed phenomenon. This paper reviews the essential aspects of the quasi-Keplerian theory of accretion around magnetized objects. Starting from the standard model of accretion by Shakura and Sunyaev, basic elements of accretion mechanism in X-ray binaries is discussed. In a quasi-Keplerian model, the disc is unstable whenever the azimuthal velocity is higher than the Keplerian velocity value. This model can also be applied in investigations of planet formation from a protoplanetary disc where magnetic strength is low.
BlurBall: a ball detector with blur estimation
Publisher: name: IEEE Signal Processing Society
Year: 2025

description: Motion blur reduces the sharpness and clarity of fast-moving objects, making object detection significantly more challenging. In sports, this effect often transforms a ball from a distinct dot into a streak, complicating its precise localization. The standard labeling convention defines the ball’s position at the front edge of the blur streak, introducing asymmetry into the detection process and disregarding valuable motion blur information that directly correlates with velocity. In this pa- per, we propose a new labeling convention that positions the ball at the midpoint of the blur streak whenever blur is present and explicitly includes motion blur attributes. We demonstrate that this labeling strategy improves detection performance across all tested models for table tennis ball tracking. Additionally, we introduce the first model capable of jointly estimating both ball position and blur characteristics. By leveraging blur information, our approach enables earlier and more accurate trajectory prediction, paving the way for improved tracking in high-speed sports.
Can Effective Field Theory of inflation generate large tensor-to-scalar ratio within Randall Sundrum single braneworld?
Creators: name: Choudhury, Sayantan
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper my prime objective is to explain the generation of large tensor-to-scalar ratio from the single field sub-Planckian inflationary paradigm within Randall Sundrum (RS) single braneworld scenario in a model independent fashion. By explicit computation I have shown that the effective field theory prescription of brane inflation within RS single brane setup is consistent with sub- Planckian excursion of the inflaton field, which will further generate large value of tensor-to-scalar ratio, provided the energy density for inflaton degrees of freedom is high enough compared to the brane tension in high energy regime. Finally, I have mentioned the stringent theoretical constraint on positive brane tension, cut-off of the quantum gravity scale and bulk cosmological constant to get sub-Planckian field excursion along with large tensor-to-scalar ratio as recently observed by BICEP2 or at least generates the tensor-to-scalar ratio consistent with the upper bound of Planck (2013 and 2015) data and Planck+BICEP2+Keck Array joint constraint.
description: 20 pages, Revision accepted by Nuclear Physics B
Mixed axion/gravitino dark matter from SUSY models with heavy axinos
Creators: name: Bae, Kyu Jung
name: Baer, Howard
name: Chun, Eung Jin
name: Shin, Chang Sub
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We examine dark matter production rates in supersymmetric axion models typified by the mass hierarchy m_gravitino << m_neutralino << m_axino. In such models, one expects the dark matter to be composed of an axion/gravitino admixture. After presenting motivation for how such a mass hierarchy might arise, we examine dark matter production in the SUSY Kim-Shifman-Vainshtein-Zakharov (KSVZ) model, the SUSY Dine-Fischler-Srednicki-Zhitnitsky (DFSZ) model and a hybrid model containing contributions from both KSVZ and DFSZ. Gravitinos can be produced thermally and also non-thermally from axino, saxion or neutralino decay. We obtain upper bounds on T_R due to overproduction of gravitinos including both the thermal and non-thermal processes. For T_R near the upper bound, then dark matter tends to be gravitino dominated, but for T_R well below the upper bounds, then axion domination is more typical although in many cases we find a comparable mixture of both axions and gravitinos. In this class of models, we ultimately expect detection of relic axions but no WIMP signal, although SUSY should ultimately be discovered at colliders.
description: 38 pages with 11 figures, PRD accepted version
Ein "global orientiertes Geschichtsbewusstsein" als zukünftige Herausforderung der Geschichtsdidaktik?
Creators: name: Popp, Susanne
Publisher: name: JSSE - Journal of Social Science Education
Year: 2002

description: Für den Geschichtsunterricht, der in seinem Kerncurriculum nationalhistorisch ausgerichtet ist, stellt die Globalisierung eine große Herausforderung dar. Der Beitrag untersucht die Frage, ob und in welcher Weise die aktuelle deutsche Geschichtsdidaktik sich mit dem Thema der "Globalisierung" auseinandersetzt, und stellt die Schwierigkeiten für eine ernsthafte Annäherung an dieses Thema dar. Denn, so wird gezeigt, der Weg zu einer angemessenen geschichtsdidaktischen Antwort auf die Herausforderungen der Globalisierung kann nicht auf dem Weg zusätzlicher Inhalte gefunden werden, sondern erfordert eine konzeptionelle Herangehensweise. Deshalb skizziert der Beitrag in knapper Form neue historische Ansätze einer "globally conceptualized world history" und leitet daraus erste geschichtsdidaktische Überlegungen ab. Des weiteren werden Geschichtscurricula aus anderen Ländern, die sich mit "world history" befassen, dargestellt, diskutiert und auf Anregungen für die geschichtsdidaktische Diskussion befragt. Sie können die keine fertigen Lösungen bieten, doch Wahrnehmung der Probleme schärfen und Impulse für die geschichtsdidaktische Diskussion geben.
description: JSSE - Journal of Social Science Education, 1-2002: Globalisation
title: I libri, l’esilio
Creators: name: Miccoli, Dario
Publisher: name: Universität Graz
Year: 2021

description: This essay discusses the role that books have had for the Jews living on the southern shore
of the Mediterranean during colonial and postcolonial times, reconstructing some of the
textual encounters that led me to conduct research on these issues. Books are considered as
objects that talk about histories of belonging, exile and migration and that move from one
place to another, pass from one person to another, and are lost and found again, objects for
which we feel affection or that sometimes we want to give away. Mixing historical analysis
with ego-historical reflections on my own research path, the essay looks at books as mirrors
of the plurality of (Jewish) identities and memories that can be traced in the Mediterranean
until the 1950s and 1960s and, in different ways, until today.
description: Keywords:  Mediterranean; books; Jewish history; Sephardi Jews; migration; Diaspora
description: Mobile Culture Studies. The Journal, Vol. 7 2021, 131–144
Observing Through Wavy Water Surface： Reconstruction the distortion-free image from a distorted video sequcence.
Creators: name: jian, bijian
Publisher: name: figshare
Year: 2022
Subjects: subject: 80104 Computer Vision
subject: FOS: Computer and information sciences
subject: 80106 Image Processing
subject: 80607 Information Engineering and Theory
subject: 80201 Analysis of Algorithms and Complexity

description: In order to recover the original scene image from an image sequence distorted by water waves, an image reconstruction framework which combined robust image registration with lucky patches fusion approach is proposed in this paper.Firstly, a lucky-patches search algorithm is used to reconstruct a high-quality reference frame. Unlike the latest iterative registration methods, we first align the image sequence with the mean by an initial registration in the first iteration, and then perform the patch search algorithm in subsequent iterations. Subsequently, an iterative robust registration algorithm is applied to register the distorted frame to the reference frame. During the registration process, we combine JADE with LBFGS algorithms as the optimization strategy to accelerate the control parameters optimization process. Finally the principal component analysis and lucky patches fusion technologies are employed to refine the registered frames.
Singular Value Shrinkage Priors for Bayesian Prediction
Creators: name: Matsuda, Takeru
name: Komaki, Fumiyasu
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: We develop singular value shrinkage priors for the mean matrix parameters in the matrix-variate normal model with known covariance matrices. Our priors are superharmonic and put more weight on matrices with smaller singular values. They are a natural generalization of the Stein prior. Bayes estimators and Bayesian predictive densities based on our priors are minimax and dominate those based on the uniform prior in finite samples. In particular, our priors work well when the true value of the parameter has low rank.
Tree Reconstruction using Topology Optimisation
Creators: name: Lowe, Thomas
name: Pinskier, Joshua
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Graphics (cs.GR)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Generating accurate digital tree models from scanned environments is invaluable for forestry, agriculture, and other outdoor industries in tasks such as identifying biomass, fall hazards and traversability, as well as digital applications such as animation and gaming. Existing methods for tree reconstruction rely on feature identification (trunk, crown, etc) to heuristically segment a forest into individual trees and generate a branch structure graph, limiting their application to sparse trees and uniform forests. However, the natural world is a messy place in which trees present with significant heterogeneity and are frequently encroached upon by the surrounding environment. We present a general method for extracting the branch structure of trees from point cloud data, which estimates the structure of trees by adapting the methods of structural topology optimisation to find the optimal material distribution to support wind-loading. We present the results of this optimisation over a wide variety of scans, and discuss the benefits and drawbacks of this novel approach to tree structure reconstruction. Despite the high variability of datasets containing trees, and the high rate of occlusions, our method generates detailed and accurate tree structures in most cases.
description: The datasets generated and used in the current study are available in the Tree Reconstructions from Pointclouds Scanned in Pullenvale QLD repository, https://doi.org/10.25919/yt2m-9373
Knowledge Extraction from Natural Language Requirements into a Semantic Relation Graph
Creators: name: Schlutter, Aaron
name: Vogelsang, Andreas
Publisher: name: Technische Universität Berlin
Year: 2020
Subjects: subject: 004 Datenverarbeitung; Informatik
subject: knowledge extraction
subject: requirement engineering
subject: natural language processing
subject: semantic relation graph
subject: spreading activation

description: Knowledge extraction and representation aims to identify information and to transform it into a machine-readable format. Knowledge representations support Information Retrieval tasks such as searching for single statements, documents, or metadata. Requirements specifications of complex systems such as automotive software systems are usually divided into different subsystem specifications. Nevertheless, there are semantic relations between individual documents of the separated subsystems, which have to be considered in further processes (e.g. dependencies). If requirements engineers or other developers are not aware of these relations, this can lead to inconsistencies or malfunctions of the overall system. Therefore, there is a strong need for tool support in order to detects semantic relations in a set of large natural language requirements specifications. In this work we present a knowledge extraction approach based on an explicit knowledge representation of the content of natural language requirements as a semantic relation graph. Our approach is fully automated and includes an NLP pipeline to transform unrestricted natural language requirements into a graph. We split the natural language into different parts and relate them to each other based on their semantic relation. In addition to semantic relations, other relationships can also be included in the graph. We envision to use a semantic search algorithm like spreading activation to allow users to search different semantic relations in the graph.
Mergers in Galaxy Groups. II. The Fundamental Plane of Elliptical Galaxies
Creators: name: Taranu, Dan S.
name: Dubinski, John
name: Yee, H. K. C.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Observations consistently show that elliptical galaxies follow a tight "fundamental plane" scaling relation between size, mean surface brightness and velocity dispersion, with the form $R \propto σ^{a}μ^{b}$. This relation not only has very small (<0.05 dex) intrinsic scatter, but also has significantly different coefficients from the expected virial scaling (a "tilt"). We analyze hundreds of simulations of elliptical galaxies formed from mergers of spiral galaxies in groups to determine if the fundamental plane can emerge from multiple, mostly minor and hierarchical collisionless mergers. We find that these simulated ellipticals lie on a similar fundamental plane with $a \approx 1.7$ and $b \approx 0.3$. The scatter about this plane is not larger than observed, while the tilt is in the correct sense, although $a$ is larger than for typical observations. This supports the idea that collisionless mergers can contribute significantly to the tilt of the fundamental plane. The tilt is mainly driven by a mass-dependent dark matter fraction, such that more massive galaxies have larger dark matter fractions within $R_{e}$. We further discuss the origin of this mass-dependent dark matter fraction and its compatibility with strong lensing observations, as well as the links between the fundamental plane, dynamical masses and the virial theorem.
description: Updated to ApJ accepted version. 16 pages, 8 figures, 4 tables, 2 pre-prints, 1 paper. Comments welcome
Bildungstheoretische Kriterien der Lehrplananalyse - Ein Diskussionsangebot an die Politikdidaktik
Creators: name: Schluss, Hennig J.
Publisher: name: JSSE - Journal of Social Science Education
Year: 2002

description: Das Verhältnis von Didaktik der Politischen Bildung und Allgemeiner Pädagogik ist immer stärker von der weitergehenden Ausdifferenzierung der pädagogischen Disziplinen gezeichnet. Dies führte zu einer Entfernung der Disziplinen, die bis hin zur Kommunikationslosigkeit reicht. Anliegen dieses Beitrages ist es, anhand eines bestimmten Themas, der Lehrplananalyse, dieser Sprachlosigkeit ein Gesprächsangebot entgegenzusetzen. In einer von der DFG geförderten Forschergruppe zur Untersuchung der Übergangsphasen zu Beginn der SBZ/DDR und nach der Gründung der neuen Länder entwickelte das Projekt "Bildungstheorie und Unterricht" neun Kriterien zur Unterscheidung von affirmativen und reflektierenden Lernzielnormierungen. Diese Kriterien werden vorgestellt und auf ihre mögliche Bedeutung für die Politische Bildung hin ausgelegt und erläutert. Dabei greift der Autor u.a. auf Erfahrungen zurück, die er mit der Analyse der thüringischen Lehrplanentwicklung im Fach "Sozialkunde" gemacht hat. Zugleich sollen Anschlussmöglichkeiten an Überlegungen der Politikdidaktik zumindest kursorisch aufgezeigt werden. Als Voraussetzung dafür wird der verwendete Transformationsbegriff vorgestellt. Über das Aufzeigen von Relevanzbildungskriterien und erziehungstheoretischen Kriterien für die Lehrplananalyse soll das Gespräch zwischen den Disziplinen neu belebt werden.
description: JSSE - Journal of Social Science Education, 1-2002: Globalisation
title: The Rules of the Game
Creators: name: Oppizzi, Martino
Publisher: name: Universität Graz
Year: 2021

description: My contribution aims to enrich the debate about the relationship between migrant worlds
and material cultures by the analysis of a specifical, yet apparently anonymous object: a
tennis racket. This object has been part of the life of Carlo U., born and grown up in Tunis
in an Italian-Jewish family, then emigrated to Italy and finally arrived in Paris, where he
currently resides. The tennis racket became the centre of an interview realised on January
2021 in order to understand some aspects of the childhood of its owner, between the 1970s
and 1980s.
Carlo U.’s story has been an opportunity to reflect on the semantic stratification of the
object, which encompasses several meanings: play tool, social marker, symbolic object,
vector of sociability.
In the memory of its owner, the tennis racket evoked a lost world, a “golden age” rooted in a
post-colonial context (but still linked to codes and schemes raised during the colonial era).
The central elements of this world were the tennis club, in the European suburbs of Tunis,
a place which embodied both an emotional and a symbolic dimension. The tennis club is
remembered as a safe zone, separated from the rest of society. A place of physical training,
of course, but also a social environment to build crucial networks. A place, finally, where
young people could learn a set of shared values (often implicitly), the “rules of the game”
of the European bourgeoisie of Tunis: respect for the adversary, merit, respectability, selfimprovement,
importance of social status.
Fellow of childhood, youth and then emigration, the tennis racket acquires a new dimension
through the experience of exile, after leaving behind the sport, the country and some of the
friendships. As a result, this object seems to remind its owner of the ambiguity of the link
between past and present, and the dynamic relationship between continuities and ruptures.
From a micro-historical perspective, the analysis of this “object of exile” opens up a more
articulated reflection about historical issues, such the evolution of colonial society and its
legacy after independence, the sociability of the elites of post-colonial Tunisia, the building
of a memory from an emigrant perspective
description: Keywords: Tunis, Tennis, Migration, Colonialism, Microhistory, Livornese community
description: Mobile Culture Studies. The Journal, Vol. 7 2021, 145–170
A new ray-tracing scheme for 3D diffuse radiation transfer on highly parallel architectures
Creators: name: Tanaka, Satoshi
name: Yoshikawa, Kohji
name: Okamoto, Takashi
name: Hasegawa, Kenji
Publisher: name: arXiv
Year: 2014
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a new numerical scheme to solve the transfer of diffuse radiation on three-dimensional mesh grids which is efficient on processors with highly parallel architecture such as recently popular GPUs and CPUs with multi- and many-core architectures. The scheme is based on the ray-tracing method and the computational cost is proportional to $N_{\rm m}^{5/3}$ where $N_{\rm m}$ is the number of mesh grids, and is devised to compute the radiation transfer along each light-ray completely in parallel with appropriate grouping of the light-rays. We find that the performance of our scheme scales well with the number of adopted CPU cores and GPUs, and also that our scheme is nicely parallelized on a multi-node system by adopting the multiple wave front scheme, and the performance scales well with the amount of the computational resources. As numerical tests to validate our scheme and to give a physical criterion for the angular resolution of our ray-tracing scheme, we perform several numerical simulations of the photo-ionization of neutral hydrogen gas by ionizing radiation sources without the "on-the-spot" approximation, in which the transfer of diffuse radiation by radiative recombination is incorporated in a self-consistent manner.
description: 26 pages, 15 figures, accepted for publication in PASJ
title: „Die gute Zeit hab‘ ich dann immer mit Tieren verbracht“
Creators: name: Rokita, Isabella
Year: 2022

description: Im Rahmen der vorliegenden biographieanalytischen Arbeit wird die biographische Narration einer tiergestützt arbeitenden Therapeutin analyisert. Im Fokus der Arbeit steht die Frage, welche Perspektiven die Biographin auf die Tiere in der Therapie einnimmt. Dabei werden die Bedeutungskonstruktionen in der biographischen Narration offengelegt. Vor dem Hintergrund des Symbolischen Interaktionismus nach Blumer werden die Tiere als physikalische bzw. soziale Objekte greifbar. Damit leistet diese Forschung einen Beitrag zum bildungswissenschaftlichen Diskurs über tiergestützte Therapie.
description: In this thesis a biographical analysis is being conducted, in which the biographical narration of an animal-assisted therapist is being analyzed. The research focuses on the biographers perspective on animals in the context of therapy. The constructions of meaning are revealed in the biographical narration. Against the background of Blumer's symbolic interactionism, the animals become tangible as physical or social objects. This research thus makes a contribution to the educational discourse on animal-assisted therapy.
GNSS-Denied Semi Direct Visual Navigation for Autonomous UAVs Aided by PI-Inspired Inertial Priors
Creators: name: Gallo, Eduardo
name: Barrientos, Antonio
Publisher: name: arXiv
Year: 2022
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: This article proposes a method to diminish the pose (position plus attitude) drift experienced by an SVO (Semi-Direct Visual Odometry) based visual navigation system installed onboard a UAV (Unmanned Air Vehicle) by supplementing its pose estimation non linear optimizations with priors based on the outputs of a GNSS (Global Navigation Satellite System) Denied inertial navigation system. The method is inspired in a PI (Proportional Integral) control system, in which the attitude, altitude, and rate of climb inertial outputs act as targets to ensure that the visual estimations do not deviate far from their inertial counterparts. The resulting IA-VNS (Inertially Assisted Visual Navigation System) achieves major reductions in the horizontal position drift inherent to the GNSS-Denied navigation of autonomous fixed wing low SWaP (Size, Weight, and Power) UAVs. Additionally, the IA-VNS can be considered as a virtual incremental position (ground velocity) sensor capable of providing observations to the inertial filter. Stochastic high fidelity Monte Carlo simulations of two representative scenarios involving the loss of GNSS signals are employed to evaluate the results and to analyze their sensitivity to the terrain type overflown by the aircraft as well as to the quality of the onboard sensors on which the priors are based. The author releases the C ++ implementation of both the navigation algorithms and the high fidelity simulation as open-source software.
description: 35 pages, 20 figures
Economic Education in England
Creators: name: Abbott, Ian
Publisher: name: JSSE - Journal of Social Science Education
Year: 2003

description: Over recent years Economics as a separate subject has been in decline in England. Business Studies has grown in importance and the term Business Education is now more commonly used, in schools and colleges, to describe this area of work. This paper considers recent developments in the subject area and opportunities for further development. Particular emphasis is placed on the role of Business Education in the wider 14-19 curriculum and the prospects for future growth. The division between academic and vocationally related courses is emphasised with consideration given to the recent reform of the post-16 curriculum in England. The training of teachers in this area is outlined and implications arising from an increasing demand for teachers of Business Education is discussed.
description: JSSE - Journal of Social Science Education, 2-2003: Country Reports
Civic Education in Portugal: Curricular Evolutions in Basic Education
Creators: name: Menezes, Isabel
Publisher: name: JSSE - Journal of Social Science Education
Year: 2003

description: This paper focuses on the curricular evolutions of civic education in Portugal with particular reference to two major turning points: the Curricular Reform of 1989, that instituted Personal and Social Education as an area of basic education, and the Curricular Reorganisation of Basic Education of 2001, that states Citizenship Education as a major goal. The debates surrounding these curricular changes include the discussion not only the curricular strategies privileged (e.g., cross-disciplinary dissemination, specific subject, non-disciplinary space), but also the concept of what civic education should be about (e.g., restricted to moral-values education vs. emphasising knowledge, attitudes and competencies). The current situation and prospects for the future are discussed.
description: JSSE - Journal of Social Science Education, 2-2003: Country Reports
Poincaré--Birkhoff--Witt isomorphisms and Kapranov dg-manifolds
Creators: name: Laurent-Gengoux, Camille
name: Stiénon, Mathieu
name: Xu, Ping
Publisher: name: arXiv
Year: 2014
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: Algebraic Geometry (math.AG)
subject: Algebraic Topology (math.AT)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We prove that to every inclusion $A\hookrightarrow L$ of Lie algebroids over the same base manifold $M$ corresponds a Kapranov dg-manifold structure on $A[1]\oplus L/A$, which is canonical up to isomorphism. As a consequence, $Γ(Λ^\bullet A^\vee\otimes L/A)$ carries a canonical $L_\infty[1]$ algebra structure whose unary bracket is the Chevalley--Eilenberg differential corresponding to the Bott representation of $A$ on $L/A$ and whose binary bracket is a cocycle representative of the Atiyah class of the Lie pair $(L,A)$. To this end, we construct explicit isomorphisms of $C^\infty(M)$-coalgebras $Γ\big(S(L/A)\big)\xrightarrow{\sim}\frac{\mathcal{U}(L)}{\mathcal{U}(L)Γ(A)}$, which we elect to call Poincaré--Birkhoff--Witt maps. These maps admit a recursive characterization that allows for explicit computations. They generalize both the classical symmetrization map $S(\mathfrak{g})\to\mathcal{U}(\mathfrak{g})$ of Lie theory and (the inverse of) the complete symbol map for differential operators. Finally, we prove that the Kapranov dg-manifold $A[1]\oplus L/A$ is linearizable if and only if the Atiyah class of the Lie pair $(L,A)$ vanishes.
description: 48 pages