cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Topological Phases and Curvature-Driven Pattern Formation in Cholesteric Shells
Creators: name: Negro, Giuseppe
name: Carenza, Livio Nicola
name: Gonnella, Giuseppe
name: Marenduzzo, Davide
name: Orlandini, Enzo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We study the phase behaviour of cholesteric liquid crystal shells with different geometries. We compare the cases of tangential and no anchoring at the surface, focussing on the former case, which leads to a competition between the intrinsic tendency of the cholesteric to twist and the anchoring free energy which suppresses it. We then characterise the topological phases arising close to the isotropic-cholesteric transition. These typically consist of quasi-crystalline or amorphous tessellations of the surface by half-skyrmions, which are stable at lower and larger shell size respectively. For ellipsoidal shells, defects in the tessellation couple to local curvature, and according to the shell size they either migrate to the poles or distribute uniformly on the surface. For toroidal shells, the variations in the local curvature of the surface stabilises heterogeneous phases where cholesteric or isotropic patterns coexist with hexagonal lattices of half-skyrmions.
description: arXiv admin note: text overlap with arXiv:2106.04498
Household epidemic models and McKean-Vlasov Poisson driven stochastic differential equations
Creators: name: Forien, Raphael
name: Pardoux, Etienne
Publisher: name: arXiv
Year: 2019
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: This paper presents a new view of household epidemic models, where the interaction between the households is of mean field type. We thus obtain in the limit of infinitely many households a nonlinear Markov process solution of a McKean - Vlasov type Poisson driven SDE, and a propagation of chaos result. We also define a basic reproduction number R0, and show that if R0>1, then the nonlinear Markov process has a unique non trivial ergodic invariant probability measure, whereas if R0<=1, it converges to 0 as t tends to infinity.
Semisimple Reflection Hopf Algebras of Dimension Sixteen
Creators: name: Ferraro, Luigi
name: Kirkman, Ellen
name: Moore, W. Frank
name: Won, Robert
Publisher: name: arXiv
Year: 2019
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 16T05, 16E65, 16G10

description: For each nontrivial semisimple Hopf algebra $H$ of dimension sixteen over $\mathbb{C}$, the smallest dimension inner-faithful representation of $H$ acting on a quadratic AS regular algebra $A$ of dimension 2 or 3, homogeneously and preserving the grading, is determined. Each invariant subring $A^H$ is determined. When $A^H$ is also AS regular, thus providing a generalization of the Chevalley-Shephard-Todd Theorem, we say that $H$ is a reflection Hopf algebra for $A$.
description: Revised version. To appear in Algebras and Representation Theory
Large cardinals need not be large in HOD
Creators: name: Cheng, Yong
name: Friedman, Sy-David
name: Hamkins, Joel David
Publisher: name: arXiv
Year: 2014
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 03E55, 03E45

description: We prove that large cardinals need not generally exhibit their large cardinal nature in HOD. For example, a supercompact cardinal $κ$ need not be weakly compact in HOD, and there can be a proper class of supercompact cardinals in $V$, none of them weakly compact in HOD, with no supercompact cardinals in HOD. Similar results hold for many other types of large cardinals, such as measurable and strong cardinals.
description: 20 pages. Commentary concerning this article can be made at http://jdh.hamkins.org/large-cardinals-need-not-be-large-in-hod
Stochastic partial differential equations describing neutral genetic diversity under short range and long range dispersal
Creators: name: Forien, Raphaël
Publisher: name: arXiv
Year: 2019
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: In this paper, we consider a mathematical model for the evolution of neutral genetic diversity in a spatial continuum including mutations, genetic drift and either short range or long range dispersal. The model we consider is the spatial $ Λ$-Fleming-Viot process introduced by Barton, Etheridge and Véber, which describes the state of the population at any time by a measure on $ \R^d \times [0,1] $, where $ \R^d $ is the geographical space and $ [0,1] $ is the space of genetic types. In both cases (short range and long range dispersal), we prove a functional central limit theorem for the process as the population density becomes large and under some space-time rescaling. We then deduce from these two central limit theorems a formula for the asymptotic probability of identity of two individuals picked at random from two given spatial locations. In the case of short range dispersal, we recover the classical Wright-Malécot formula, which is widely used in demographic inference for spatially structured populations. In the case of long range dispersal we obtain a new formula which could open the way for a better appraisal of long range dispersal in inference methods.
Generalized Tchebyshev triangulations
Creators: name: Hetyei, Gábor
name: Nevo, Eran
Publisher: name: arXiv
Year: 2014
Subjects: subject: Combinatorics (math.CO)
subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: Primary 05E45, Secondary 57Q15, 05A15, 11B83

description: After fixing a triangulation $L$ of a $k$-dimensional simplex that has no new vertices on the boundary, we introduce a triangulation operation on all simplicial complexes that replaces every $k$-face with a copy of $L$, via a sequence of induced subdivisions. The operation may be performed in many ways, but we show that the face numbers of the subdivided complex depend only on the face numbers of the original complex, in a linear fashion. We use this linear map to define a sequence of polynomials generalizing the Tchebyshev polynomials of the first kind and show, that in many cases, but not all, the resulting polynomials have only real roots, located in the interval $(-1,1)$. Some analogous results are shown also for generalized Tchebyshev polynomials of the higher kind, defined using summing over links of all original faces of a given dimension in our generalized Tchebyshev triangulations. Generalized Tchebyshev triangulations of the boundary complex of a cross-polytope play a central role in our calculations, and for some of these we verify the validity of a generalized lower bound conjecture by the second author.
Geometry of planar curves intersecting many lines in a few points
Creators: name: Vardakis, Dimitris
name: Volberg, Alexander
Publisher: name: arXiv
Year: 2019
Subjects: subject: Analysis of PDEs (math.AP)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics

description: The local Lipschitz property is shown for the graph avoiding multiple point intersection with lines directed in a given cone. The assumption is much stronger than those of Marstrand's well-known theorem, but the conclusion is much stronger too. Additionally, a continuous curve with a similar property is $σ$-finite with respect to Hausdorff length and an estimate on the Hausdorff measure of each "piece" is found.
description: This replacement was done to incorporate the referee's comments after submission to journal and add bibliographic information
GALEX Catalog of UV Point Sources in M33
Creators: name: Mudd, Dale
name: Stanek, K. Z.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The hottest stars ($>$10,000 K), and by extension typically the most massive ones, are those that will be prevalent in the ultraviolet (UV) portion of the electromagnetic spectrum, and we expect numerous B, O, and Wolf-Rayet stars to be bright in UV data. In this paper, we update the previous UV catalog of M33, created using the Ultraviolet Imaging Telescope (UIT), using data from the Galaxy Evolution Explorer (GALEX). We utilize PSF photometry to better handle the crowded regions in the galaxy, and benefit from GALEX's increased sensitivity compared to UIT. We match our detections with data from the Local Group Galaxies Survey (LGGS) to create a catalog with photometry spanning from the far-UV through the optical for a final list of 24738 sources. All of these sources have far-UV (FUV; 1516A), near-UV (NUV; 2267A), and V data, and a significant fraction also have U, B, R, and I data as well. We compare these sources to a catalog of known Wolf-Rayet stars in M33 and find that we recover 114 of 206 stars with spatially-coincident UV objects. Additionally, we highlight and investigate those sources with unique colors as well as a selection of other well-studied sources in M33.
description: Version accepted by MNRAS, updated with suggestions from the referee. For a brief video abstract of the paper, please visit http://www.youtube.com/watch?v=TcJ95LNhGt8
title: Απεικονιστικές τεχνικές στη μελέτη της πολιτιστικής κληρονομιάς
title: Απεικονιστικές τεχνικές στη μελέτη της πολιτιστικής κληρονομιάς
Creators: name: Alexopoulou, Athina Georgia
name: Kaminari, Agathi Anthoula
name: Moutsatsou, Anna
name: Banou, Penelope
Publisher: name: Kallipos, Open Academic Editions
Year: 2023
Subjects: μη καταστρεπτικός έλεγχος
διάγνωση
συντήρηση
διατήρηση
προστασία
τεκμηριωση
αποκατάσταση
απεικονιστικές τεχνικές
ορατό
υπεριώδες
υπέρυθρο
απορρόφηση
ανάκλαση
φωτοφωταύγεια
ακτινοβολία
εικαστικά έργα
βιβλιακό και αρχειακό υλικό
λίθοι
κεραμικά
αρχαιολογικό υλικό
τοιχογραφίες
επιχρίσματα
υλικά κατασκευής
τεχνολογία κατασκευής
κατάσταση διατήρησης
επεμβάσεις
επιζωγραφήσεις
φθορές
προκαταρκτικό σχέδιο
non destructive testing
conservation
preservation
protection
documentation
restoration
spectral imaging
visible
ultraviolet
infrared
absorption
reflection
luminescence
radiation
works of art
books and archival material
stone
ceramics
archaeological material
wall paintings
condition
interventions
retouching
overpaintings
damage
underdrawing
stratigraphy
pigments
diagnosis

description: Σκοπός του βιβλίου είναι η παρουσίαση των απεικονιστικών τεχνικών που χρησιμοποιούνται στη διαγνωστική των έργων τέχνης και των αρχαιοτήτων. Τα περιεχόμενά του θα συγκροτήσουν έναν οδηγό εφαρμογής των απεικονιστικών τεχνικών ...
description: Σκοπός του βιβλίου είναι η παρουσίαση των απεικονιστικών τεχνικών που χρησιμοποιούνται στη διαγνωστική των έργων τέχνης και των αρχαιοτήτων. Τα περιεχόμενά του θα συγκροτήσουν έναν οδηγό εφαρμογής των απεικονιστικών τεχνικών ...
On Huisman's conjectures about unramified real curves
Creators: name: Kummer, Mario
name: Manevich, Dimitri
Publisher: name: arXiv
Year: 2019
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: Let $X \subset \mathbb{P}^{n}$ be an unramified real curve with $X(\mathbb{R}) \neq \emptyset$. If $n \geq 3$ is odd, Huisman conjectures that $X$ is an $M$-curve and that every branch of $X(\mathbb{R})$ is a pseudo-line. If $n \geq 4$ is even, he conjectures that $X$ is a rational normal curve or a twisted form of a such. We disprove the first conjecture by giving a family of counterexamples. We remark that the second conjecture follows for generic curves of odd degree from the formula enumerating the number of complex inflection points.
description: 9 pages, 2 figures
Enhanced dark-state sideband cooling in trapped atoms via photon-mediated dipole-dipole interactions
Creators: name: Wang, Chung-Hsien
name: Wang, Yi-Cheng
name: Chen, Chi-Chih
name: Wang, Chun-Che
name: Jen, H. H.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Resolved sideband cooling provides a crucial step in subrecoil cooling the trapped atoms toward their motional ground state, which is essential in atom-based quantum technologies. Here we present an enhanced dark-state sideband cooling in trapped atoms utilizing photon-mediated dipole-dipole interactions among them. By placing the atoms at the magic interparticle distances, we manifest an outperformed cooling behavior in the target atom, which surpasses the limit that a single atom permits. We further investigate various atomic configurations in a multiatom setup with a laser detuning and different light polarization angles, where multiple magic spacings can be identified and a moderate improvement in cooling performance is predicted as the number of atoms increases. Our results provide insights to subrecoil cooling of atoms with collective and light-induced long-range dipole-dipole interactions, and pave the way toward implementing genuine quantum operations in multiple quantum registers.
description: 5 figures
Open Data Management Plan (First release)
Creators: name: Santuci, Raffaella
name: Grillo, Vincenzo
name: Gazzadi, Giancarlo
Publisher: name: Zenodo
Year: 2018

description: The Europe 2020 strategy for a smart, sustainable, and inclusive economy underlines the central role of
 knowledge and innovation in generating growth. For this reason, the European Union strives to improve
 access to scientific information and to boost the benefits of public investment in the research funded under
 the EU Framework Programme for Research and Innovation Horizon 2020 (2014-2020).
 According to this strategy, in Horizon 2020 a limited pilot action on open access to research data has been
 implemented so that participating projects will be required to develop an Open Data Management Plan
 (ODMP), in which they will specify what data will be open.
 This deliverable of the Q-SORT project is prepared as part of WP1, Open Data Management Plan (1st
 version). In this document we initiate the discussion of management, life cycle, processes of data
 generated by Q-SORT in order to make such data findable, accessible, interoperable, and reusable
 (FAIR).
 The aim of this document is to provide an analysis of the main elements of the data management policy
 that will be used with regard to all the data sets that will be generated by the project.
Multifractal analysis of the irregular set for almost-additive sequences via large deviations
Creators: name: Bomfim, Thiago
name: Varandas, Paulo
Publisher: name: arXiv
Year: 2014
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37D35, 37D20, 60F10, 37D25, 37C30

description: In this paper we introduce a notion of free energy and large deviations rate function for asymptotically additive sequences of potentials via an approximation method by families of continuous potentials. We provide estimates for the topological pressure of the set of points whose non-additive sequences are far from the limit described through Kingman's sub-additive ergodic theorem and give some applications in the context of Lyapunov exponents for diffeomorphisms and cocycles, and Shannon-McMillan-Breiman theorem for Gibbs measures.
description: 23 pages, to appear in Nonlinearity; small changes made according to comments from the referees
Holistic nanowire laser characterization as a route to optimal design
Creators: name: Church, Stephen
name: Patel, Nikesh
name: Al-Abri, Ruqaiya
name: Al-Amairi, Nawal
name: Zhang, Yunyan
name: Liu, Huiyun
name: Parkinson, Patrick
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Nanowire lasers are sought for near-field and on-chip photonic applications as they provide integrable, coherent and monochromatic radiation. A wavelength-scale nanowire acts as both the gain medium and the cavity for the lasing action: the functional performance (threshold and wavelength) is therefore dependent on both the opto-electronic and crystallographic properties of each nanowire. However, scalable bottom-up manufacturing techniques often suffer from inter-nanowire variation, leading to, often dramatic, differences in yield and performance between individual nanowires. Establishing the relationship between manufacturing controls, geometric and material properties and the lasing performance is a crucial step towards optimisation, however, this is challenging to achieve experimentally due to the complex interdependance of such properties. Here, we present a high-throughput correlative approach to characterise over 5000 individual GaAsP/GaAs multiple quantum well nanowire lasers. Fitting the spontaneous emission provides the threshold carrier density, while coherence length measurements measures end-facet reflectivity. We show that the lasing wavelength and threshold are intrinsically related to the width of a single quantum well due to quantum confinement and bandfilling effects. Unexpectedly, there is no strong relationship between the properties of the lasing cavity (facet reflectivity and distributed losses) and the threshold: instead the threshold is negatively correlated with the non-radiative recombination lifetime of the carriers. This approach therefore provides an optimisation strategy that is not accessible through small-scale studies. The quality and width of the quantum wells limit the threshold of these nanowire lasers, rather than the cavity quality.
Dynamics of moments of arbitrary order for stochastic Poisson squeezings
Creators: name: Teretenkov, A. E.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: 81S22, 82C31, 81Q05, 81Q80

description: The explicit dynamics of the moments for the GKSL equation is obtained. In our case the GKSL equation corresponds to Poisson stochastic processes which lead to unitary jumps. We consider squeeze operators as the unitary jumps.
A Constructive Version of Tarski's Geometry
Creators: name: Beeson, Michael
Publisher: name: arXiv
Year: 2014
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 03F50

description: Euclid's reasoning is essentially constructive. Tarski's elegant and concise first-order theory of Euclidean geometry, on the other hand, is essentially non-constructive, even if we restrict attention (as we do here) to the theory with line-circle and circle-circle continuity in place of first-order Dedekind completeness. Here we exhibit three constructive versions of Tarski's theory. One, like Tarski's theory, has existential axioms and no function symbols. We then consider a version in which function symbols are used instead of existential quantifiers. The third version has a function symbol for the intersection point of two non-parallel, non-coincident lines, instead of only for intersection points produced by Pasch's axiom and the parallel axiom; this choice of function symbols connects directly to ruler-and-compass constructions. All three versions have this in common: the axioms have been modified so that the points they assert to exist are unique and depend continuously on parameters. This modification of Tarski's axioms, with classical logic, has the same theorems as Tarski's theory, but we obtain results connecting it with ruler-and-compass constructions as well. In particular, points constructively proved to exist can be constructed with ruler and compass, uniformly in parameters; the same is true with non-constructive proofs if several constructions are allowed for different cases.
description: 92 pages, 30 figures. Final pre-publication version
Handwritten Amharic Character Recognition Using a Convolutional Neural Network
Creators: name: Gondere, Mesay Samuel
name: Schmidt-Thieme, Lars
name: Boltena, Abiot Sinamo
name: Jomaa, Hadi Samer
Publisher: name: arXiv
Year: 2019
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Amharic is the official language of the Federal Democratic Republic of Ethiopia. There are lots of historic Amharic and Ethiopic handwritten documents addressing various relevant issues including governance, science, religious, social rules, cultures and art works which are very reach indigenous knowledge. The Amharic language has its own alphabet derived from Ge'ez which is currently the liturgical language in Ethiopia. Handwritten character recognition for non Latin scripts like Amharic is not addressed especially using the advantages of the state of the art techniques. This research work designs for the first time a model for Amharic handwritten character recognition using a convolutional neural network. The dataset was organized from collected sample handwritten documents and data augmentation was applied for machine learning. The model was further enhanced using multi-task learning from the relationships of the characters. Promising results are observed from the later model which can further be applied to word prediction.
description: ECDA2019 Conference Oral Presentation
Project Website and Logo
Creators: name: Santucci, Raffaella
Publisher: name: Zenodo
Year: 2018

description: The purpose of this deliverable is to offer an update on the work on the Q-SORT project logo and the
 Q-SORT website, its sections, its technical infrastructures, and its related services.
 This deliverable complies with the Q-SORT DoW outlined in Work Package 6, Dissemination,
 Communication and Exploitation. It particularly satisfies specifications outlined in Task 6.1, Graphic identity
 study and logo design and Task 6.3, Website design and execution, thus providing a reference point for all
 necessary actions regarding the promotion of Q-SORT’s Web presence.
A subquadratic-scaling subspace projection method for large-scale Kohn-Sham density functional theory calculations using spectral finite-element discretization
Creators: name: Motamarri, Phani
name: Gavini, Vikram
Publisher: name: arXiv
Year: 2014
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We present a subspace projection technique to conduct large-scale Kohn-Sham density functional theory calculations using spectral finite-element discretization. The proposed method treats both metallic and insulating materials in a single framework, and is applicable to both pseudopotential as well as all-electron calculations. The key ideas involved in the method include: (i) employing a higher-order spectral finite-element basis that is amenable to mesh adaption; (ii) using a Chebyshev filter to construct a subspace which is an approximation to the occupied eigenspace in a given self-consistent field iteration; (iii) using a localization procedure to construct a non-orthogonal localized basis spanning the Chebyshev filtered subspace; (iv) using a Fermi-operator expansion in terms of the subspace-projected Hamiltonian represented in the non-orthogonal localized basis to compute relevant quantities like the density matrix, electron density and band energy. We demonstrate the accuracy and efficiency of the approach on benchmark systems involving pseudopotential calculations on metallic aluminum nano-clusters up to 3430 atoms and on insulating alkane chains up to 7052 atoms, as well as all-electron calculations on silicon nano-clusters up to 3920 electrons. The benchmark studies revealed that accuracies commensurate with chemical accuracy can be obtained, and a subquadratic-scaling with system size was observed for the range of materials systems studied. In particular, for the alkane chains---close to linear-scaling is observed, whereas, for aluminum nano-clusters---the scaling is observed to be $\mathcal{O} (N^{1.46})$. For all-electron calculations on silicon nano-clusters, the scaling with the number of electrons is computed to be $\mathcal{O} (N^{1.75})$. Furthermore, significant computational savings have been realized with the proposed approach with respect to reference calculations.
description: 25 pages, 18 figures
Impact of the finite life-time of UHECR sources
Creators: name: Eichmann, Björn
name: Kachelrieß, Michael
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The observational data on ultrahigh energy cosmic rays (UHECR), in particular their mass composition, show strong indications for extremely hard spectra of individual mass groups of CR nuclei at Earth. In this work, we show that such hard spectra can be the result of the finite life-time of UHECR sources, if a few individual sources dominate the UHECR flux at the highest energies. In this case, time delays induced by deflections in the turbulent extragalactic magnetic field as well as from the diffusive or advective escape from the source environment can suppress low-energy CRs, leading to a steepening of the observed spectrum. Considering radio galaxies as the main source of UHECRs, we discuss the necessary conditions that few individual sources dominate over the total contribution from the bulk of sources that have been active in the past. We provide two proof-of-principle scenarios showing that for a turbulent extragalactic magnetic field with a strength $B$ and a coherence length $l_{\rm coh}$, the life-time of a source at a distance $d_{\rm src}$ should satisfy ${t_{\rm act} \sim \left( B/1\,\text{nG} \right)^2\,\left( d_{\rm src}/10\,\text{Mpc} \right)^2\,\left( l_{\rm coh}/1\,\text{Mpc} \right)\,\text{Myr}}$ to obtain the necessary hardening of the CR spectrum at Earth.
Secure continuous variable quantum teleportation and Einstein-Podolsky-Rosen steering
Creators: name: He, Qiongyi
name: Rosales-Zarate, Laura
name: Adesso, Gerardo
name: Reid, Margaret
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the resources needed for secure teleportation of coherent states. We extend continuous variable teleportation to include quantum tele-amplification protocols, that allow non-unity classical gains and a pre-amplification or post-attenuation of the coherent state. We show that, for arbitrary Gaussian protocols and a significant class of Gaussian resources, two-way steering is required to achieve a teleportation fidelity beyond the no-cloning threshold. This provides an operational connection between Gaussian steerability and secure teleportation. We present practical recipes suggesting that heralded noiseless pre-amplification may enable high-fidelity heralded teleportation, using minimally entangled yet steerable resources.
description: 5 pages, 4 figures, improved referencing and new proofs, supplementary materials included
Discovery of Smoothly Evolving Blackbodies in the Early Afterglow of GRB 090618 : Evidence for a Spine-Sheath Jet?
Creators: name: Basak, Rupal
name: Rao, A. R.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: GRB 090618 is a bright GRB with multiple pulses. It shows evidence of thermal emission in the initial pulses as well as in the early afterglow phase. As high resolution spectral data of \emph{Swift}/XRT is available for the early afterglow, we investigate the shape and evolution of the thermal component in this phase using data from the \emph{Swift}/BAT, the \emph{Swift}/XRT, and the \emph{Fermi}/GBM detectors. An independent fit to the BAT and XRT data reveals two correlated blackbodies with monotonically decreasing temperatures. Hence we investigated the combined data with a model consisting of two blackbodies and a power-law (2BBPL), a model suggested for several bright GRBs. We elicit the following interesting features of the 2BBPL model: a) the same model is applicable from the peak of the last pulse in the prompt emission to the afterglow emission, b) the ratio of temperatures and the fluxes of the two black bodies remains constant throughout the observations, c) the black body temperatures and fluxes show a monotonic decrease with time, with the BB fluxes dropping about a factor of two faster than that of the power-law emission, d) attributing the blackbody emission to photospheric emissions, we find that the photospheric radii increase very slowly with time, and the lower temperature blackbody shows a larger emitting radius than that of the higher temperature black body. We find some evidence that the underlying shape of the non-thermal emission is a cut-off power-law rather than a power-law. We sketch a spine-sheath jet model to explain our observations.
description: 12 pages, 7 figures, ApJ accepted
Exact Partitioning of High-order Models with a Novel Convex Tensor Cone Relaxation
Creators: name: Ke, Chuyang
name: Honorio, Jean
Publisher: name: arXiv
Year: 2019
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: In this paper we propose an algorithm for exact partitioning of high-order models. We define a general class of $m$-degree Homogeneous Polynomial Models, which subsumes several examples motivated from prior literature. Exact partitioning can be formulated as a tensor optimization problem. We relax this high-order combinatorial problem to a convex conic form problem. To this end, we carefully define the Carathéodory symmetric tensor cone, and show its convexity, and the convexity of its dual cone. This allows us to construct a primal-dual certificate to show that the solution of the convex relaxation is correct (equal to the unobserved true group assignment) and to analyze the statistical upper bound of exact partitioning.
Sign change of the anomalous Hall effect and the anomalous Nernst effect in Weyl semimetal CeAlSi
Creators: name: Alam, Md Shahin
name: Fakhredine, Amar
name: Ahmed, Mujeeb
name: Tanwar, P. K.
name: Yang, Hung-Yu
name: Tafti, Fazel
name: Cuono, Giuseppe
name: Islam, Rajibul
name: Singh, Bahadur
name: Lynnyk, Artem
name: Autieri, Carmine
name: Matusiak, Marcin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report the anomalous Hall effect (AHE) and the anomalous Nernst effect (ANE) data for the non-collinear Weyl semimetal CeAlSi. The anomalous Hall conductivity (σ_ij^A) was measured for two different orientations of the magnetic field (B), namely σ_yz^A for B II a and σ_xy^A for B II c, where a and c denote the crystallographic axes. We find that σ_xy^A and σ_yz^A are of opposite sign and both are large below the Curie temperature (T_C). In the paramagnetic phase, σ_xy^A raises even more and goes through a maximum at T ~ 170 K, whereas the absolute value of σ_yz^A decreases with increasing temperature. The origin of the sign difference between σ_xy^A and σ_yz^A was attributed to the reconstruction of the band structure under the variation of the spin orientation. Further, in a system where humps in the AHE are present and scalar spin chirality is zero, we show that the k-space topology plays an important role to determine the transport properties at both low and high temperatures. We also observed the anomalous contribution in the Nernst conductivity (α_xy^A) measured for B II c. α_xy^A/T turns out to be sizeable in the magnetic phase and above T_C slowly decreases with temperature. We were able to recreate the temperature dependences of σ_xy^A and α_xy^A/T in the paramagnetic phase using a single band toy-model assuming a non-zero Berry curvature in the vicinity of the Weyl node. A decisive factor appears to be a small energy distance between the Fermi level and a Weyl point.
description: 37 pages, 11 figures
DAAT – Digitale Arbeitshilfe zum Alten Testament
Creators: name: Weingart, Kristin
Publisher: name: Universität Tübingen
Year: 2018
Subjects: subject: Theologie , Bibel / Altes Testament , Prüfungsvorbereitung , Quiz , Peer Review
subject: 370
subject: Review-Circle
subject: Selbst-Assessment
subject: Online-Angebot

description: Das Online-Angebot DAAT „Digitale Arbeitshilfen zum Alten Testament“ zielt auf einen besonderen Studienabschnitt – die Examensphase. Diese stellt für viele Studierende im Studiengang Evangeli-sche Theologie wegen der Notwendigkeit der intensiven und umfänglichen Vorbereitung in Kom-bination mit den Prüfungen als Stressfaktor eine große Herausforderung dar. DAAT ist als ein Lehrangebot konzipiert, dass die Studierenden einerseits beim Erwerb spezifischer prüfungsbezogener Kompetenzen unterstützen soll und andererseits Möglichkeiten zu einem den Lernprozess begleitenden Selbst-Assessment bietet. Es entstand als ein begleitendes Angebot zu einem Repetitorium und somit zu einer in ihrer didaktischen Ausrichtung eher traditionellen Lehr-veranstaltung mit Seminarcharakter. Der hier vorliegende Erfahrungsbericht beschreibt die Erstellung und Konzeption des Angebots und reflektiert seine erste Erprobung und die sich ergebenden Konsequenzen. Die spezifische Ausgestaltung und Anwendung von DAAT sind auf das Curriculum des Studien-gangs Evangelische Theologie an der Evangelisch-Theologischen Fakultät der Universität Tübingen und die Prüfungsanforderungen der I. Evangelisch-Theologischen Dienstprüfung in der Evangeli-schen Landeskirche in Württemberg bezogen. Sie mögen aber auch Anregungen für andere, v.a. geisteswissenschaftliche Studiengänge bieten.
Micropropagation of Vaccinium virgatum ‘Delite’: a rabbiteye cultivar adapted to mild winters
Creators: name: Schuchovski, Carolina
name: Biasi, Luiz Antonio
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Space Science
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Plant Biology

description: Blueberries have large amounts of antioxidant and anti-inflammatory compounds, playing an important role in improving health. In vitro culture is a possible method for vegetative propagation overcoming the problems of pathogen infection. Most studies on the in vitro culture of blueberries focus on highbush and lowbush cultivars. However, blueberry rabbiteye cultivars have lower chilling requirements and are more adapted to mild winter regions. Our objective was to develop a micropropagation protocol through axillary shoot growth, with reduced risks of somaclonal variation in ‘Delite’ rabbiteye blueberry. In vitro establishment was tested with single-node segments. The most promising results were using 2.5 µM zeatin. Multiplication through axillary shoot growth, starting with two-node stem segments were more successful in the concentration of 2.5 µM zeatin (70% of explants with axillary shoot growth). In vitro and ex vitro rooting with acclimatization were compared. In vitro rooting was achieved with immersion in 500 mg L−1 IBA (indole-3-butyric acid). Different substrates and mineral salts were also compared in ex vitro rooting. The results in vermiculite with WPM mineral salts were superior (68% rooting). In conclusion, this study provides techniques for micropropagation through axillary shoots of ‘Delite’ rabbiteye blueberry concerning establishment, multiplication, rooting, and acclimatization of plants.
Regularized and Smooth Double Core Tensor Factorization for Heterogeneous Data
Creators: name: Tarzanagh, Davoud Ataee
name: Michailidis, George
Publisher: name: arXiv
Year: 2019
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: We introduce a general tensor model suitable for data analytic tasks for {\em heterogeneous} datasets, wherein there are joint low-rank structures within groups of observations, but also discriminative structures across different groups. To capture such complex structures, a double core tensor (DCOT) factorization model is introduced together with a family of smoothing loss functions. By leveraging the proposed smoothing function, the model accurately estimates the model factors, even in the presence of missing entries. A linearized ADMM method is employed to solve regularized versions of DCOT factorizations, that avoid large tensor operations and large memory storage requirements. Further, we establish theoretically its global convergence, together with consistency of the estimates of the model parameters. The effectiveness of the DCOT model is illustrated on several real-world examples including image completion, recommender systems, subspace clustering and detecting modules in heterogeneous Omics multi-modal data, since it provides more insightful decompositions than conventional tensor methods.
description: 49 pages, 4 figures
Gaudium Latinum Gamification in der Vorbereitung auf das Latinum anhand des digitalen Antwortsystems Socrative
Creators: name: Nill, Hans-Peter
Publisher: name: Universität Tübingen
Year: 2018
Subjects: subject: Gamification , Smartphone , Cicero, Marcus Tullius , In Verrem , Multiple-Choice-Verfahren , Methodenwechsel , Motivation , Aktivierung , Wettkampf , Spiel
subject: 370
subject: Socrative
subject: formatives Feedback
subject: individuelle Fehleranalyse
subject: Blended Learning Designs
subject: Mobiles Lernen
subject: Adaptive Lerntechnologien
subject: Quiz-App
subject: Latinum
subject: Constructive Alignment
subject: Pro Sexto Roscio Amerino
subject: Orationes Philippicae in Antonium
subject: True/False
subject: Short Answer
subject: Induktives Vorgehen
subject: Deduktives Vorgehen
subject: Mediumwechsel

description: Im Wintersemester 2017/18 wurde die Feedback-App Socrative in der universitären Vor-bereitung auf das Latinum eingesetzt. Ziel des vorliegenden Beitrags ist darzulegen und zu reflektieren, inwiefern anhand dieses digital gestützten Ansatzes der ‚Gamification‘ die Unterrichtssitzungen abwechslungsreicher gestaltet sowie sprachliche und historisch-kulturelle Kompetenzen der Studierenden bereits im Verlauf der Veranstaltung zusätzlich gefestigt werden. Neben der Erzeugung eines produktiven Arbeitsklimas und der mögli-chen Steigerung der Fachkompetenz werden auch die Aspekte ‚formatives Feedback‘ und ‚individuelle Fehleranalyse‘ in den Fokus gerückt.
Diversity and regeneration strategies in woody plant communities of the Mediterranean Basin: Vegetation type matters
Creators: name: Tüfekcioğlu, İrem
name: Tavşanoğlu, Çağatay
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Plant Biology

description: The Mediterranean Basin has distinct vegetation types shaped by fire, herbivory, and various human activities. Based on data from 83 belt transects of 10 × 40 m in 28 study sites for five physiognomic vegetation types (semi-closed forest, open forest, closed shrubland, open shrubland, and scrubland) in southwestern Anatolia (Turkey), we analyzed woody species diversity, woody community composition, and vegetation structure of study sites. We used the growth form and regeneration strategy for functional comparisons of physiognomic vegetation types. We found clear distinctions in diversity, species composition, and functional structure of woody plant community across five physiognomic vegetation types. The forest-shrubland-scrubland distinction was the most apparent one. Despite similarities in the woody species richness and Shannon diversity, open and closed vegetation states of forests and shrublands also differed regarding the density and cover of mature individuals and the density of saplings in different functional groups. Non-metric multidimensional scaling analyses and indicator species analyses also indicated clear distinctions among physiognomic vegetation types and openness states. Our findings indicate the necessity of a more complex description of vegetation types in the Mediterranean Basin. The results suggest that open and closed vegetation states of forests and shrublands are functionally distinct vegetation types. Supplemental data for this article is available online at https://doi.org/10.1080/11263504.2022.2036845.
Rota-Baxter operators of nonzero weight on the matrix algebra of order three
Creators: name: Goncharov, Maxim
name: Gubarev, Vsevolod
Publisher: name: arXiv
Year: 2019
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 16W99

description: We classify all Rota-Baxter operators of nonzero weight on the matrix algebra of order three over an algebraically closed field of characteristic zero which are not arisen from the decompositions of the entire algebra into a direct vector space sum of two subalgebras.
description: 25 p
Stationary solutions of semilinear Schrödinger equations with trapping potentials in supercritical dimensions
Creators: name: Ficek, Filip
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 34B15, 34B18, 35Q55

description: Nonlinear Schrödinger equations are usually investigated with the use of the variational methods that are limited to energy-subcritical dimensions. Here we present the approach based on the shooting method that can give the proof of existence of the ground states in critical and supercritical cases. We formulate the assumptions on the system that are sufficient for this method to work. As examples, we consider Schrödinger-Newton and Gross-Pitaevskii equations with harmonic potentials.
description: 8 pages, accepted for publication in the proceedings of Equadiff 15
Enhancement of Solar Absorbers and Radiative Coolers via Nanostructuring and Improved Reliability and Efficiency of GaN HEMT devices
Creators: name: Kortge, David J.
Publisher: name: Purdue University Graduate School
Year: 2023
Subjects: classificationCode: 401603
subject: Compound semiconductors
classificationCode: 400911
subject: Power electronics
classificationCode: 400909
subject: Photonic and electro-optical devices, sensors and systems (excl. communications)
classificationCode: 321202
subject: Optical technology

description: Management of incoming solar radiation and use of the sky as an ultimate heat sink are technological imperatives as climate change shifts our reliance from fossil fuels to sustainable sources. Selective solar absorbers are a possible route for solar harvesting as they collect the incoming radiation for process heat or space heating. Here, improvement in the performance of selective solar absorbers via photon recycling is investigated using a stepped index rugate filter. The final proposed filter when integrated with a high vacuum selective solar absorber could see an improvment in solar-thermal conversion efficiency from 13% to 30.6%. Then, a frequency selective optical filter is fabricated with uses including improvement of radiative coolers. The measured optical characteristics are compared with simulation data and found to match well.
 The shift to sustainable sources of electricity will require an expansion of the electrical grid. The backbone of the grid for converting high voltage AC to DC, and vice versa, is power electronics. The current state-of-the-art technology is GaN HEMTs, but GaN MISHEMTs are poised to replace them since MISHEMTs reduce the gate leakage current; a deficiency of the GaN HEMT architecture. First, time dependent dielectric breakdown in GaN MISHEMTs is investigated using concurrent electrical and thermoreflectance methods. A susceptibility in the MISHEMT architecture is found and possible solutions are proposed. Then, liquid cooling of GaN HEMT PAs is explored by demonstrating integration of an X-band front end module, printed circuit board, and fluid manifold. The integration shows great promise as two-phase cooling performance improved with increasing power dissipated, while single-phase cooling performance degraded.
Learned Inertial Odometry for Autonomous Drone Racing
Creators: name: Cioffi, Giovanni
name: Bauersfeld, Leonard
name: Kaufmann, Elia
name: Scaramuzza, Davide
Publisher: name: arXiv
Year: 2022
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Inertial odometry is an attractive solution to the problem of state estimation for agile quadrotor flight. It is inexpensive, lightweight, and it is not affected by perceptual degradation. However, only relying on the integration of the inertial measurements for state estimation is infeasible. The errors and time-varying biases present in such measurements cause the accumulation of large drift in the pose estimates. Recently, inertial odometry has made significant progress in estimating the motion of pedestrians. State-of-the-art algorithms rely on learning a motion prior that is typical of humans but cannot be transferred to drones. In this work, we propose a learning-based odometry algorithm that uses an inertial measurement unit (IMU) as the only sensor modality for autonomous drone racing tasks. The core idea of our system is to couple a model-based filter, driven by the inertial measurements, with a learning-based module that has access to the thrust measurements. We show that our inertial odometry algorithm is superior to the state-of-the-art filter-based and optimization-based visual-inertial odometry as well as the state-of-the-art learned-inertial odometry in estimating the pose of an autonomous racing drone. Additionally, we show that our system is comparable to a visual-inertial odometry solution that uses a camera and exploits the known gate location and appearance. We believe that the application in autonomous drone racing paves the way for novel research in inertial odometry for agile quadrotor flight.
Il Codex Purpureus Rossanensis: status quaestionis e problemi aperti
Creators: name: Maniaci, Marilena
name: Orsini, Pasquale
Publisher: name: Scrineum Rivista
Year: 2018

description: Ever since its rediscovery in 1831 and the first report issued on it in 1846, the CodexpurpureusRossanensishas attracted the attention of scholars, chiefly on account of its decorative and textual characteristics. Far less commonplace are studies specifically dedicated to the analysis of the codex’s material and graphic aspects. The present contribution stems from the opportunity―generously provided to the authors―to study the original codex, and also from a desire to closely re-examine its codicological and palaegraphical features, with the aim of producing an updated statusquaestionisenhanced with some new critical insights.
description: Scrineum Rivista, 15 (2018)
La génesis en el documento notarial castellano. El caso del término de Sevilla durante la edad moderna
Creators: name: Dominquez, Maria
Publisher: name: Scrineum Rivista
Year: 2018

description: This paper deals with the public notaries, or public scribes, working at the Kingdom of Seville, in Castille, during the second half of the 16thcentury. We have focused our study on the public documents elaborated by these professionals in order to determine what the process of writing these public instruments consisted of, what these instruments were, in how many phases they were set, who was responsible for the implementation of each of these phases and if they were similar to those described in other territories. The division of tasksand the internal organization of the offices are also analysed
description: Scrineum Rivista, 15 (2018)