cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: A large strain gradient-enhanced ductile damage model
title: finite element formulation, experiment and parameter identification
titleType: AlternativeTitle
Creators: name: Sprave, Leon
name: Menzel, Andreas
Publisher: name: TU Dortmund
Year: 2020
Subjects: subject: Ductile damage
subject: Gradient-enhanced formulation
subject: Micromorphic model
subject: Parameter identification
subject: DIC measurements
subject: Multi-surface formulation
subject: 620
subject: 670
subject: Scherbruch
subject: Konstruktionsdaten
subject: Identifikation
subject: Bildkorrelation
subject: Digitalmesstechnik
subject: Dualphasenstahl
subject: Finite-Elemente-Methode

description: A gradient-enhanced ductile damage model at finite strains is presented, and its parameters are identified so as to match the behaviour of DP800. Within the micromorphic framework, a multi-surface model coupling isotropic Lemaitre-type damage to von Mises plasticity with nonlinear isotropic hardening is developed. In analogy to the effective stress entering the yield criterion, an effective damage driving force—increasing with increasing plastic strains—entering the damage dissipation potential is proposed. After an outline of the basic model properties, the setup of the (micro)tensile experiment is discussed and the importance of including unloading for a parameter identification with a material model including damage is emphasised. Optimal parameters, based on an objective function including measured forces and the displacement field obtained from digital image correlation, are identified. The response of the proposed model is compared to a tensile experiment of a specimen with a different geometry as a first approach to validate the identified parameters.
description: Acta Mech;231
Matching the Observed Star Formation Intensity Distribution with Empirical Laws
Creators: name: Thompson, Rodger I.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This letter matches the shape of the star formation intensity distribution function to empirical laws such as the Schmidt law. The shape of the distribution at a redshift of one is reproduced from the empirical Schmidt law with a critical density, a Schechter distribution of galaxy masses and the assumption that star formation occurs mainly in exponential disks. The shape of the distribution depends primarily on two values, the characteristic mass m* in the Schechter mass distribution and the characteristic radius re in the exponential disk. As these characteristic values evolve they will affect the shape of the distribution function. The expected direction of evolution of the parameters partially cancels each other leaving the distribution shape relatively invariant.
description: Accepted by The Astrophysical Journal Letters, 4 pages 1 figure
Two-scale shape optimisation based on numerical homogenisation techniques and variational sensitivity analysis
Creators: name: Kijanski, Wojciech
name: Barthold, Franz-Joseph
Publisher: name: TU Dortmund
Year: 2021
Subjects: subject: FEM
subject: Numerical multiscale methods (FE2) and homogenisation
subject: Two-scale structural analysis
subject: Variational sensitivity analysis
subject: Structural optimisation
subject: Shape optimisation
subject: 690

description: This contribution presents a theoretical and computational framework for two-scale shape optimisation of nonlinear elastic structures. Particularly, minimum compliance optimisation problems with composite (matrix-inclusion) microstructures subjected to static loads and volume-type design constraints are focused. A homogenisation-based FE2 scheme is extended by an enhanced formulation of variational (shape) sensitivity analysis based on Noll’s intrinsic, frame-free formulation of continuum mechanics. The obtained overall two-scale sensitivity information couples shape variations across micro- and macroscopic scales. A numerical example demonstrates the capabilities of the proposed variational sensitivity analysis and the (shape) optimisation framework. The investigations involve a mesh morphing scheme for the design parametrisation at both macro- and microscopic scales.
description: Comput Mech;67
Megerlia eusticta
Creators: name: Bitner, Maria Aleksandra
name: Moissette, Pierre
Publisher: name: Zenodo
Year: 2003
Subjects: Biodiversity
Taxonomy
Animalia
Brachiopoda
Rhynchonellata
Terebratulida
Kraussinidae
Megerlia
Megerlia eusticta

description: Megerlia eusticta (Philippi, 1836) (Fig. 7; Table 7)
 Megerlia eusticta – Gaetani & Saccà 1985a: 16, 17, text-fig. 11, pl. 10, figs 1-9; pl. 11, figs 6-12. — Calzada 1997: 31, 32, figs 1-3. — Bitner & Martinell 2001: 182, 183, fig. 4A-K.
MATERIAL EXAMINED. — 19 complete specimens, two ventral valves, and one dorsal valve from Algeria: REMARKS
 Megerlia eusticta is the third commonest species in the studied material but was found only in four localities (see Table 1). Limited to the Pliocene of the Mediterranean it was already described from Italy and Spain (Gaetani & Saccà 1985a; Benigni & Robba 1990; Taddei Ruggiero 1996; Calzada 1997; Bitner & Martinell 2001). Its small, rounded shell, delicate ornamentation of faint striae (Fig. 7I, J), short beak truncated by a large foramen make it easily recognisable among Pliocene species. Ficheur (1896a, b, d) noted the genus Megerlia in the Pliocene of Algeria but without specific determination.
This is the first record of this species from Morocco.
description: Published as part of Bitner, Maria Aleksandra & Moissette, Pierre, 2003, Pliocene brachiopods from north-western Africa, pp. 463-479 in Geodiversitas 25 (3) on page 474, DOI: 10.5281/zenodo.5375081
Supplementary document for Switchable imaging between edge-enhanced and bright-field based on a phase-change metasurface - 5311433.pdf
Creators: name: Yang, Hui
name: Xie, Zhenwei
name: He, Hairong
name: Zhang, Qiang
name: li, jiahao
name: Zhang, Yilin
name: Yuan, Xiaocong
Publisher: name: Optica Publishing Group
Year: 2021
Subjects: Uncategorized

description: Supplementary Materials
Penrose Limits of Non-standard Brane Intersections
Creators: name: Lu, H.
name: Vazquez-Poritz, J. F.
Publisher: name: arXiv
Year: 2002
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The non-standard intersection of two 5-branes and a string can give rise to AdS_3\times S^3\times S^3\times S^1. We consider the Penrose limit of this geometry and study the supersymmetry of the resulting pp-wave solution. There is a one-parameter family of Penrose limits associated with the orthogonal rotation of the two foliating circles within the two 3-spheres. Supernumerary Killing spinors arise only when the rotation angle is 45 degrees, for which case we obtain the corresponding light-cone string action that has linearly-realised supersymmetry. We also obtain Penrose limits of other non-standard intersections that give rise to the product of AdS_3 or AdS_2 and two spheres. The resulting pp-waves are supported by multiple constant field strengths.
description: Latex, 15 pages, references added
Multi-modal gated recurrent units for image description
Creators: name: Li, Xuelong
name: Yuan, Aihong
name: Lu, Xiaoqiang
Publisher: name: arXiv
Year: 2019
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Using a natural language sentence to describe the content of an image is a challenging but very important task. It is challenging because a description must not only capture objects contained in the image and the relationships among them, but also be relevant and grammatically correct. In this paper a multi-modal embedding model based on gated recurrent units (GRU) which can generate variable-length description for a given image. In the training step, we apply the convolutional neural network (CNN) to extract the image feature. Then the feature is imported into the multi-modal GRU as well as the corresponding sentence representations. The multi-modal GRU learns the inter-modal relations between image and sentence. And in the testing step, when an image is imported to our multi-modal GRU model, a sentence which describes the image content is generated. The experimental results demonstrate that our multi-modal GRU model obtains the state-of-the-art performance on Flickr8K, Flickr30K and MS COCO datasets.
description: 25 pages, 7 figures, 6 tables, magazine
Anisotacrus xanthostigma
Creators: name: Riedel, Matthias
name: Diller, Erich
name: Japoshvili, George
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Anisotacrus
Anisotacrus xanthostigma

description: Anisotacrus xanthostigma (GRAVENHORST, 1829)
M a t e r i a l: H 4-5: 1♀ 15-25.VI.
D i s t r i b u t i o n: Palaearctic region, new for Georgia and the Caucasus region.
description: Published as part of Riedel, Matthias, Diller, Erich & Japoshvili, George, 2018, The Ichneumonid fauna (Hymenoptera: Ichneumonidae) of Lagodekhi Reserve, Sakartvelo (Georgia), with descriptions of four new species, pp. 1447-1507 in Linzer biologische Beiträge 50 (2) on page 1466, DOI: 10.5281/zenodo.5275090
Pseudocypraeinae Steadman & Cotton 1943
Creators: name: Pacaud, J. - M.
Publisher: name: Zenodo
Year: 2003
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Littorinimorpha
Cypraeidae

description: Subfamily PSEUDOCYPRAEINAE  Steadman & Cotton, 1943  REMARKS
 The distinction between the ovulid subfamilies is mainly based on radular characters (Schilder 1936). The Pseudocypraeinae differ from the Pediculariinae Gray, 1853 by the morphology of their first and second marginal teeth, which are asymmetrical and whip-shaped in the Pseudocypraeinae Pseudocypraea adamsonii (Sowerby, 1832), and palmleaf-shaped in the conchologically similar Pediculariinae Jenneria (s.s.) pustulata (Solander, 1786) (Thiele 1929: 270, figs 285, 286; Azuma 1975: 76, fig. 1; Dolin & Ledon 2002: 331).
description: Published as part of Pacaud, J. - M., 2003, First fossil records of the Recent Ovulid genus Pseudocypraea Schilder, 1927 (Mollusca, Gastropoda) with description of a new species, pp. 451-462 in Geodiversitas 25 (3) on page 454, DOI: 10.5281/zenodo.5375302
Dual equivalence between Self-Dual and Maxwell-Chern-Simons models coupled to dynamical U(1) charged matter
Creators: name: Anacleto, M. A.
name: Ilha, A.
name: Nascimento, J. R. S.
name: Ribeiro, R. F.
name: Wotzasek, C.
Publisher: name: arXiv
Year: 2001
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the equivalence between the self-dual and the Maxwell-Chern-Simons (MCS) models coupled to dynamical, U(1) charged matter, both fermionic and bosonic. This is done through an iterative procedure of gauge embedding that produces the dual mapping of the self-dual vector field theory into a Maxwell-Chern-Simons version. In both cases, to establish this equivalence a current-current interaction term is needed to render the matter sector unchanged. Moreover, the minimal coupling of the original self-dual model is replaced by a non-minimal magnetic like coupling in the MCS side. Unlike the fermionic instance however, in the bosonic example the dual mapping proposed here leads to a Maxwell-Chern-Simons theory immersed in a field dependent medium.
description: RevteX file, 5 pages, no figures
Energy transfer and interference by collective electromagnetic coupling
Creators: name: Gómez-Castaño, Mayte
name: Cubero, Andrés Redondo
name: Buisson, Lionel
name: Pau, Jose Luis
name: Mihi, Agustin
name: Ravaine, Serge
name: Vallée, Renaud A. L.
name: Nitzan, Abraham
name: Sukharev, Maxim
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The physics of collective optical response of molecular assemblies, pioneered by Dicke in 1954, has long been at the center of theoretical and experimental scrutiny. The influence of the environment on such phenomena is also of great interest due to various important applications in e.g. energy conversion devices. In this manuscript we demonstrate both experimentally and theoretically the spatial modulations of the collective decay rates of molecules placed in proximity to a metal interface. We show in a very simple framework how the cooperative optical response can be analyzed in terms of intermolecular correlations causing interference between the response of different molecules and the polarization induced on a nearby metallic boundary and predict similar collective interference phenomena in excitation energy transfer between molecular aggregates.
Anoncus gracilicornis
Creators: name: Riedel, Matthias
name: Diller, Erich
name: Japoshvili, George
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Anoncus
Anoncus gracilicornis

description: Anoncus gracilicornis (HOLMGREN, 1857)
M a t e r i a l: H 3: 1♂ 5-15.IV.
D i s t r i b u t i o n: Europe, new for Georgia and the Caucasus region.
description: Published as part of Riedel, Matthias, Diller, Erich & Japoshvili, George, 2018, The Ichneumonid fauna (Hymenoptera: Ichneumonidae) of Lagodekhi Reserve, Sakartvelo (Georgia), with descriptions of four new species, pp. 1447-1507 in Linzer biologische Beiträge 50 (2) on page 1466, DOI: 10.5281/zenodo.5275090
Limitations of curvature--induced rigidity: How a curved strip buckles under gravity
Creators: name: Taffetani, Matteo
name: Box, Finn
name: Neveu, Arthur
name: Vella, Dominic
Publisher: name: arXiv
Year: 2019
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The preference of thin flat sheets to bend rather than stretch, combined with results from Geometry, mean that changes in a thin sheet's Gaussian curvature are prohibitively expensive. As a result, an imposed curvature in one principal direction inhibits bending in the other: so-called curvature-induced rigidity. Here, we study the buckling behaviour of a rectangular strip of finite thickness held horizontally in a gravitational field, but with a transverse curvature imposed at one end. The finite thickness of the sheet limits the efficacy of curvature-induced rigidity in two ways: (i) finite bending stiffness acts to `uncurve' the sheet, even if this costs some stretching energy, and (ii) for sufficiently long strips, finite weight deforms the strip downwards, releasing some of its gravitational potential energy. We find the critical imposed curvature required to prevent buckling (or, equivalently, to rigidify the strip), determining the dependence on geometrical and constitutive parameters, as well as describing the buckled shape of the strip well beyond the threshold for buckling. In doing so, we quantify the intuitive understanding of curvature-induced rigidity that we gain from curving the crust of a slice of pizza to prevent it from drooping downwards as we eat.
description: To appear in EPL. 12 pages, 8 figures + 11 pages supplementary material
Additional file 2: of Measuring similarity between gene interaction profiles
Creators: name: JoĂŤlle Barido-Sottani
name: Chapman, Samuel
name: Evsey Kosman
name: Arcady Mushegian
Publisher: name: figshare
Year: 2019
Subjects: subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Molecular Biology
subject: Evolutionary Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Marine Biology
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: 60506 Virology

description: Figure S1. Cumulative similarity distributions between genetic interaction vectors under different similarity measures for the two-square transformation. (PDF 179 kb)
Campodorus agarcin KASPARYAN 2005
Creators: name: Riedel, Matthias
name: Diller, Erich
name: Japoshvili, George
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Campodorus
Campodorus agarcin

description: Campodorus agarcin KASPARYAN, 2005
M a t e r i a l: H 3: 1♀ 5-15.IV.
D i s t r i b u t i o n: Southeastern Europe, known from Armenia (KASPARYAN 2005), new for Georgia.
description: Published as part of Riedel, Matthias, Diller, Erich & Japoshvili, George, 2018, The Ichneumonid fauna (Hymenoptera: Ichneumonidae) of Lagodekhi Reserve, Sakartvelo (Georgia), with descriptions of four new species, pp. 1447-1507 in Linzer biologische Beiträge 50 (2) on page 1466, DOI: 10.5281/zenodo.5275090
Geometric Flows of Diffeomorphisms
Creators: name: Carapetis, Anthony
Publisher: name: The Australian National University
Year: 2017
Subjects: differential geometry
geometric flow
geometric analysis
diffeomorphism
parabolic equations
heat flow

description: The idea of this thesis is to apply the methodology of geometric heat flows to the study of spaces of diffeomorphisms. We start by describing the general form that a geometrically natural flow must take and the implications this has for the evolution equations of associated geometric quantities. We discuss the difficulties involved in finding appropriate flows for the general case, and quickly restrict ourselves to the case of surfaces. In particular the main result is a global existence, regularity and convergence result for a geometrically defined quasilinear flow of maps u between flat surfaces, producing a strong deformation retract of the space of diffeomorphisms onto a finite-dimensional submanifold. Partial extensions of this result are then presented in several directions. For general Riemannian surfaces we obtain a full local regularity estimate under the hypothesis of bounds above and below on the singular values of the first derivative. We achieve these gradient bounds in the flat case using a tensor maximum principle, but in general the terms contributed by curvature are not easy to control. We also study an initial-boundary-value problem for which we can attain the necessary gradient bounds using barriers, but the delicate nature of the higher regularity estimate is not well-adapted for obtaining uniform estimates up to the boundary. To conclude, we show how appropriate use of the maximum principle can provide a proof of well-posedness in the smooth category under the assumption of estimates for all derivatives.
Campodorus amictus
Creators: name: Riedel, Matthias
name: Diller, Erich
name: Japoshvili, George
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Campodorus
Campodorus amictus

description: Campodorus amictus (HOLMGREN, 1857)
M a t e r i a l: H 4: 2♂♂ 4-14.VI, 1♂ 25.VI-5.VII.
D i s t r i b u t i o n: Palaearctic region, new for Georgia and the Caucasus region.
description: Published as part of Riedel, Matthias, Diller, Erich & Japoshvili, George, 2018, The Ichneumonid fauna (Hymenoptera: Ichneumonidae) of Lagodekhi Reserve, Sakartvelo (Georgia), with descriptions of four new species, pp. 1447-1507 in Linzer biologische Beiträge 50 (2) on page 1466, DOI: 10.5281/zenodo.5275090
A Population of Intergalactic Supernovae in Galaxy Clusters
Creators: name: Gal-Yam, Avishay
name: Maoz, Dan
name: Guhathakurta, Puragra
name: Filippenko, Alexei V.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have discovered seven type Ia cluster supernovae (SNe) in the course of the Wise Observatory Optical Transients Search in the fields of galaxy clusters with redshifts between z=0.06 and z=0.2. Two of these events, SN 1998fc in Abell 403 (z=0.10) and SN 2001al in Abell 2122/4 (z = 0.066), have no obvious hosts. Both events appear projected on the halos of the central cD galaxies, but have velocity offsets of 750-2000 km/s relative to those galaxies, suggesting they are not bound to them. We use deep Keck imaging of the locations of the two SNe to put upper limits on the luminosities of possible dwarf hosts, M_R > -14 mag for SN 1998fc and M_R > -11.8 mag for SN 2001al. The fractions of the cluster luminosities in dwarf galaxies fainter than our limits are less than 3 x 10^-3 and 3 x 10^-4, respectively. Thus, 2/7 of the SNe would be associated with less than 3 x 10^-3 of the luminosity attributed to galaxies. We argue, instead, that the progenitors of both events were probably members of a diffuse population of intergalactic stars, recently detected in local clusters via planetary nebulae and red giants. Considering the higher detectability of hostless SNe compared to normal SNe, we estimate that 20^{+12}_{-15} percent of the SN Ia parent stellar population in clusters is intergalactic. This fraction is consistent with other measurements of the intergalactic stellar population, and implies that the process that produces intergalactic stars (e.g., tidal disruption of cluster dwarfs) does not disrupt or enhance significantly the SN Ia formation mechanism. Hostless SNe are potentially powerful tracers of the formation of the intergalactic stellar population out to high redshift.
description: 25 pages, 2 figures, To appear in AJ, Feb. 2003 issue
Contextuality and nonlocality of indistinguishable particles
Creators: name: Gangopadhyay, Debajyoti
name: Srikanth, R.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Unlike in the case of distinguishable particles, the concept of entanglement-- not to mention, nonlocality-- remains debated in case of indistinguishable particles. Here, we show that certain existing all-versus-nothing type of proofs of contextuality or nonlocality for distinguishable particles, based on a logical contradiction, may be carried over to indistinguishable particles.
description: Accepted for publication in Physica Scripta. Supercedes arXiv:1201.5080
Asymmetric Supernovae from Magneto-Centrifugal Jets
Creators: name: Wheeler, J. Craig
name: Meier, David L.
name: Wilson, James R.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Strong toroidal magnetic fields generated in stellar collapse can generate magneto-centrifugal jets in analogy to those found in simulations of black hole accretion and explain why all core collapse supernovae are found to be substantially asymmetric and predominantly bi-polar. We describe two phases: the initial LeBlanc-Wilson jet and a subsequent protopulsar or toroidal jet that propagates at about the core escape velocity. The jets will produce bow shocks that tend to expel matter, including iron and silicon, into equatorial tori, accounting for observations of the element distribution in Cas A. A magnetic ``switch'' mechanism may apply in instances of low density and large magnetic field with subsequent increase in the speed and collimation of the toroidal jet, depositing relatively little momentum. The result could be enough infall to form a black hole with a third, highly relativistic jet that could catch up to the protopulsar jet after it has emerged from the star. The interaction of these two jets could generate internal shocks and explain the presence of iron lines in the afterglow. Recent estimates that typical gamma-ray burst energy is about 3x10^50 erg imply either a very low efficiency for conversion of rotation into jets, or a rather rapid turnoff of the jet process even though the black hole still rotates rapidly. Magnetars and ``hypernovae'' might arise in an intermediate parameter regime of energetic jets that yield larger magnetic fields and provide more energy than the routine case, but that are not so tightly collimated that they yield failed supernova. (slightly abridged)
description: AASTeX, 29 pages, 2 postscript figures, accepted by ApJ, November 20, 2001
Campodorus caucasicus Riedel & Diller & Japoshvili 2018, nov.sp.
Creators: name: Riedel, Matthias
name: Diller, Erich
name: Japoshvili, George
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Campodorus
Campodorus caucasicus

description: Campodorus caucasicus nov.sp.
M a t e r i a l: H 4-5: 1♀ 15-27.IX.
D i s t r i b u t i o n: Only known from Georgia.
description: Published as part of Riedel, Matthias, Diller, Erich & Japoshvili, George, 2018, The Ichneumonid fauna (Hymenoptera: Ichneumonidae) of Lagodekhi Reserve, Sakartvelo (Georgia), with descriptions of four new species, pp. 1447-1507 in Linzer biologische Beiträge 50 (2) on page 1466, DOI: 10.5281/zenodo.5275090
Super-PP-wave Algebra from Super-AdS x S Algebras in Eleven-dimensions
Creators: name: Hatsuda, Machiko
name: Kamimura, Kiyoshi
name: Sakaguchi, Makoto
Publisher: name: arXiv
Year: 2002
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Maximally supersymmetric spacetime algebras in eleven-dimensions, which are the isometry superalgebras of Minkowski space, AdS_7 x S^4, AdS_4 x S^7 and pp-wave background, are related by Inonu-Wigner contractions. The super-AdS_{4(7)} x S^{7(4)} algebras allow to introduce two contraction parameters, the one for the flat limit to the super-Poincare algebra and the other for a Penrose limit to the super-pp-wave algebra. Under these contractions supersymmetries are maintained because the Jacobi identity of three supercharges holds for any values of contraction parameters.
description: 9 pages, LaTex2e file
eLTER PLUS Deliverable D4.4 - Piloting of eLTER specific downstream services contributing to eLTER Standard Observation Variables
Creators: name: Díaz-Delgado, Ricardo
name: García Díaz, Diego
name: Marangi, Carmela
name: Silver, Micha
name: Oggioni, Alessandro
name: Tagliolato Acquaviva D'Aragona, Paolo
name: Karnieli, Arnon
name: PETERSEIL, Johannes
name: vicario, saverio
name: Anttila, Saku
name: Böttcher, Kristin
name: Bolton, Will
name: Wohner, Christoph
name: Minic, Vladan
Publisher: name: Zenodo
Year: 2025
Subjects: subject: Remote sensing
subject: Earth observation
subject: validation
subject: phenology
subject: standard observation
subject: GeeLTERMap
subject: PyVPP
subject: downstream services
subject: Copernicus
subject: In-situ data
subject: co-location
subject: eLTER Plus

description: This task is complementary to eLTER PLUS Tasks 3.2 (eLTER PLUS contributions to strengthening thefunctional nexus between remote sensing and in-situ observations) and 4.3 (Harvesting andharmonizing of Remote Sensing products) and seeks to assess spatial and temporal accuracy of EarthObservation (EO) products and services in relation to selected eLTER Standard Observations (SO)measured in-situ. The task has been implemented as a pilot study including:● Review of existing EO products & services (Copernicus, GEOSS, etc.) as potential proxies forSO● Identification of cross-domain SOs with widespread use across eLTER sites● Prioritization of SO matching specific EO products and services● Sites selection for pilot test according to available in-situ data● Pilot implementation through developed tools in DataLabs and accuracy assessment includingupscaling methodsTask 4.4. has proceeded in parallel to Task 3.2. on strengthening the functional nexus between EarthObservation and in-situ data from eLTER sites and platforms which can meet the requirements forcalibration and validation (cal/val) of Earth Observation products and services.Both tasks have addressed the Copernicus in-situ component, led by EEA, defining a list ofrequirements and a roadmap to facilitate eLTER RI future integration in Copernicus cal/val networks.The task has also contributed to the RCs Biodiversity (Task 8.1 Biodiversity loss) and Socio-Ecology(Task 4.5 LTSER pilot data provisioning – utilizing RI expertise for spatially-explicit socio-ecological dataprovision to platforms) with the developed tools and the generated EO products.
Broadband reflection spectroscopy of MAXI J1535-571 using AstroSat: Estimation of black hole mass and spin
Creators: name: Sridhar, Navin
name: Bhattacharyya, Sudip
name: Chandra, Sunil
name: Antia, H. M.
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Experiment (hep-ex)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: We report the results from \textit{AstroSat} observations of the transient Galactic black hole X-ray binary MAXI J1535-571 during its hard-intermediate state of the 2017 outburst. We systematically study the individual and joint spectra from two simultaneously observing \textit{AstroSat} X-ray instruments, and probe and measure a number of parameter values of accretion disc, corona and reflection from the disc in the system using models with generally increasing complexities. Using our broadband ($1.3-70$ keV) X-ray spectrum, we clearly show that a soft X-ray instrument, which works below $\sim 10-12$ keV, alone cannot correctly characterize the Comptonizing component from the corona, thus highlighting the importance of broadband spectral analysis. By fitting the reflection spectrum with the latest version of the \textsc{relxill} family of relativistic reflection models, we constrain the black hole's dimensionless spin parameter to be $0.67^{+0.16}_{-0.04}$. We also jointly use the reflection spectral component (\textsc{relxill}) and a general relativistic thin disc component (\texttt{Kerrbb}), and estimate the black hole's mass and distance to be $10.39_{-0.62}^{+0.61} M_{\odot}$ and $5.4_{-1.1}^{+1.8}$ kpc respectively.
description: Accepted for publication in MNRAS
Machine learning via transitions
Creators: name: Van Rooyen, Brendan
Publisher: name: The Australian National University
Year: 2015
Subjects: machine learning
decision theory

description: This thesis presents a clear conceptual basis for theoretically studying machine learning problems. Machine learning methods afford means to automate the discovery of relationships in data sets. A relationship between quantities X and Y allows the prediction of one quantity given information of the other. It is these relationships that we make the central object of study. We call these relationships transitions. A transition from a set X to a set Y is a function from X into the probability distributions on Y. Beginning with this simple notion, the thesis proceeds as follows: Utilizing tools from statistical decision theory, we develop an abstract language for quantifying the information present in a transition. We attack the problem of generalized supervision. Generalized supervision is the learning of classifiers from non-ideal data. An important example of this is the learning of classifiers from noisily labelled data. We demonstrate the virtues of our abstract treatment by producing generic methods for solving these problems, as well as producing generic upper bounds for our methods as well as lower bounds for any method that attempts to solve these problems. As a result of our study in generalized supervision, we produce means to define procedures that are robust to certain forms of corruption. We explore, in detail, procedures for learning classifiers that are robust to the effects of symmetric label noise. The result is a classification algorithm that is easier to understand, implement and parallelize than standard kernel based classification schemes, such as the support vector machine and logistic regression. Furthermore, we demonstrate the uniqueness of this method. Finally, we show how many feature learning schemes can be understood via our language. We present well motivated objectives for the task of learning features from unlabelled data, before showing how many standard feature learning methods (such as PCA, sparse coding, auto-encoders and so on) can be seen as minimizing surrogates to our objective functions.
Electrophoresis of active Janus particles
Creators: name: Bayati, Parvin
name: Najafi, Ali
Publisher: name: arXiv
Year: 2019
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We theoretically consider the dynamics of a self-propelled active Janus motor moving in an external electric field. The external field can manipulate the route of a Janus particle and enforce it to move towards the desired targets. To investigate the trajectory of this active motor, we use a perturbative scheme. At the leading orders of surface activity of the Janus particle and also the external field, the orientational dynamics of the Janus particles behave like a mathematical pendulum with an angular the velocity that is sensitive to both the electric field and surface activity of the motor.
description: 11 pages, 3 figures
Intimate Past & Present Light: Using Photography to Investigate Self-Defining Memories
Creators: name: England, Odette Sherie
Publisher: name: The Australian National University
Year: 2017
Subjects: photography
photographs
autobiographical memory
snapshots
self
relationships
self-defining memories
encounter
Endel Tulving
Henri Bergson
chronesthesia
recollection
reminiscence bump
prepositional space
lumen prints
chlorophyll prints

description: This practice-led research project investigates the relationship between autobiographical memory and photography. My research question comprises two parts. Firstly, how can I mediate the virtual space between myself, as both the maker and as the subject of my practice, to the viewer? Rather than communicating autobiographical specificity, how to emphasise the malleability of personal memories, using the photographic object as metaphor, so that a viewer may experience some shared nostalgia for the ‘lost’ past. Secondly, to what extent can the separation of self occur, from being ‘fixed’ in a snapshot and ‘semi-fixed’ in memory to being ‘present’ in the studio? I initiated this project from my preoccupation with self-defining memories of intimate relationships. I began with my ‘self’. These memories provided a means of confronting my research objective: using photography to manipulate them. This research reflects the need to address through photography the plasticity and transferability of memory’s hold on the present. To do this, I reworked personal snapshots and memories through material and sensory encounter. To help make way for a viewer’s bond to form with my work, I needed to dissolve and rework my bond with personal snapshots and memories. This was key to bridging the intangible space of my past. I produced several series of photographs, contextualised by Endel Tulving’s hypothesis of chronesthesia (mental time travel) and Henri Bergson’s theory of recollection recovery. Through conception and execution of reworked photographs, I occupied a distinctive space as a maker/subject. This space, which I have termed prepositional space, allowed me to ‘unfix’ self from snapshots and memories to be present in the studio. This makes way for a viewer’s bond to form. I argue that prepositional space is a significant new methodology for artists and viewers to assess their encounter with such photographs.
Addressing barriers of culture, mindset and institutions through effective co-creation forums and networking, in North-east Scotland, UK
Creators: name: Miller, David
name: Irvine, Katherine
name: Kyle, Carol
name: Smith, Pete
name: Albanito, Fabrizio
Publisher: name: Zenodo
Year: 2021
Subjects: Agro-ecology
Multi-Actor Platform
North-East Scotland Agriculture Advisory Group (NESAAG)
Barriers
Culture
Mindset
Co-creation

description: Culture and mindset can be barriers to transitions to agro-ecological farming systems. Farmers, institutions, authorities, businesses and other actors in value chains often rely on familiarity with existing approaches and experience-based outputs. Resistance to change, unproven approaches, or inertia in changing position, inhibits uptake of new ideas and practices. Findings from the H2020 UNISECO project show the benefits of partnerships of public, private, research and civil society sectors in sharing knowledge and addressing barriers to agro-ecological transition of culture and mindset. An example of an effective forum that facilitates effective sharing of knowledge is the North-East Scotland Agriculture Advisory Group (NESAAG), UK. A long-term outcome of the operation of such forums can be the acceptance of their benefits as actors in their own right in which participants co-construct approaches that are recognised as taking account of the interests of all sectors.
description: This Policy Brief is one of a set produced by the H2020 UNISECO project. Others are accessible on the Zenodo repository under the UNISECO Community.
Campodorus difformis
Creators: name: Riedel, Matthias
name: Diller, Erich
name: Japoshvili, George
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Campodorus
Campodorus difformis

description: Campodorus difformis (HOLMGREN, 1876)
M a t e r i a l: H 1: 2♀♀ 2♂♂ 5-15. V; H 2: 1♀ 5-15. V; H 3: 1♀ 1♂ 5-15.IV, 1♀ 4♂♂ 15-25. V; H 4: 1♀ 25.V-4. VI, 1♂ 4-14. VI, 2♀♀ 15-25. VI.
D i s t r i b u t i o n: Europe, new for Georgia and the Caucasus region.
description: Published as part of Riedel, Matthias, Diller, Erich & Japoshvili, George, 2018, The Ichneumonid fauna (Hymenoptera: Ichneumonidae) of Lagodekhi Reserve, Sakartvelo (Georgia), with descriptions of four new species, pp. 1447-1507 in Linzer biologische Beiträge 50 (2) on page 1466, DOI: 10.5281/zenodo.5275090
Construction of non-Abelian gauge theories on noncommutative spaces
Creators: name: Jurco, Branislav
name: Möller, Lutz
name: Schraml, Stefan
name: Schupp, Peter
name: Wess, Julius
Publisher: name: arXiv
Year: 2001
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a formalism to explicitly construct non-Abelian gauge theories on noncommutative spaces (induced via a star product with aconstant Poisson tensor) from a consistency relation. This results in an expansion of the gauge parameter, the noncommutative gauge potential and fields in the fundamental representation, in powers of a parameter of the noncommutativity. This allows the explicit construction of actions for these gauge theories.
description: 11 pages; accepted for publication in European Physical Journal C; one misprint corrected
Plaquette instability competing with bicollinear ground state in detwinned FeTe
Creators: name: Tam, David W.
name: Lai, Hsin-Hua
name: Hu, Jin
name: Lu, Xingye
name: Walker, H. C.
name: Abernathy, D. L.
name: Niedziela, J. L.
name: Weber, Tobias
name: Enderle, M.
name: Su, Yixi
name: Mao, Z. Q.
name: Si, Qimiao
name: Dai, Pengcheng
Publisher: name: arXiv
Year: 2019
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We use inelastic neutron scattering to show that long-range spin waves arising from the static bicollinear antiferromagnetic (AF) order in FeTe, which have twofold rotational symmetry in a fully detwinned crystal, rapidly dissolve above $E\approx 26$ meV into ridges of scattering with fourfold rotational symmetry and a nearly isotropic magnetic fluctuation spectrum. With increasing temperature above $T_N\approx 68$ K, the twofold spin waves change into broad regions of scattering with fourfold symmetry. Since the scattering patterns from plaquette magnetic order generated within a bilinear biquadratic Hamiltonian have fourfold rotational symmetry consistent with the high-energy, spin-isotropic spin waves of FeTe, we conclude that the bicollinear AF state in FeTe is quasidegenerate with plaquette magnetic order, providing evidence for the strongly frustrated nature of the local moments in iron chalcogenide family of iron-based superconductors.
description: 12 pages, 11 figures
Campodorus flavicintus
Creators: name: Riedel, Matthias
name: Diller, Erich
name: Japoshvili, George
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Campodorus
Campodorus flavicintus

description: Campodorus flavicintus (GMELIN, 1790)
M a t e r i a l: H 2: 1 ♀ 5-15.V.
D i s t r i b u t i o n: Palaearctic region, new for Georgia and the Caucasus region.
description: Published as part of Riedel, Matthias, Diller, Erich & Japoshvili, George, 2018, The Ichneumonid fauna (Hymenoptera: Ichneumonidae) of Lagodekhi Reserve, Sakartvelo (Georgia), with descriptions of four new species, pp. 1447-1507 in Linzer biologische Beiträge 50 (2) on page 1466, DOI: 10.5281/zenodo.5275090
Hystrix primigenia
Creators: name: Sen, Sevket
Publisher: name: Zenodo
Year: 2001
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Rodentia
Hystricidae
Hystrix
Hystrix primigenia

description: Hystrix cf. primigenia (Wagner, 1848) (Fig. 6)
MATERIAL EXAMINED. — M1 or M2 dex (10.3 × 10.0) (PR-153) and m1 or m2 sin (10.7 × 9.1) (PR-156).
LOCALITY. — Serrat d’en Vacquer, Perpignan, Pyrénées orientales, France.
DESCRIPTION AND COMPARISON
 Perpignan collection includes two specimens that are different in size and morphology from the other specimens described above as Hystrix depereti n. sp. Their colour is also different: brown in these two teeth while all other Hystrix remains from Serrat d’en Vacquer are whitish or beige in colour. Thus, they may have been erroneously mixed with the Perpignan material.
 These two teeth are first characterized by their smaller size. P4 has a rectangular occlusal outline although it represents a very adult individual (age class II or IV). Its occlusal surface has the usual pattern of Hystrix, with a deep lingual hypoflexus and four labial synclines. Its typical feature is the depth of the hypoflexus which starts, in lingual view, at 4.6 mm above the base of the crown. The large lingual root is grooved and subdivided into two cavities. In addition, there are two small labial roots.
 The m1 or m2 is also differentiated by its smaller size compare to other Hystrix remains from Perpignan. The pattern of the occlusal surface is as in H. primigenia and Hystrix depereti n. sp.: one labial hypoflexid and four labial synclines which are rather oblique. From the labial view, the hypoflexid is deep; it starts at 7.3 mm above the base of the crown. There are two labial and two lingual roots.
 These two teeth cannot be attributed to Hystrix depereti n. sp. because of their smaller size, less hypsodont crown, and deeper hypoflexus (id). The characters mentioned above fit better with those of H. primigenia, when compared with the specimens from Pikermi (Greece), Kalimanci IV and Hadji Dimovo (Bulgaria).
description: Published as part of Sen, Sevket, 2001, Early Pliocene porcupine (Mammalia, Rodentia) from Perpignan, France: a new systematic study, pp. 303-312 in Geodiversitas 23 (2) on page 310, DOI: 10.5281/zenodo.5375317
Constraining the cosmological parameters with the gas mass fraction in local and z>0.7 Galaxy Clusters
Creators: name: Ettori, S.
name: Tozzi, P.
name: Rosati, P.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a study of the baryonic fraction in galaxy clusters aimed at constraining the cosmological parameters Omega_m, Omega_Lambda and the ratio between the pressure and density of the ``dark'' energy, w. We use results on the gravitating mass profiles of a sample of nearby galaxy clusters observed with the BeppoSAX X-ray satellite (Ettori, De Grandi, Molendi 2002) to set constraints on the dynamical estimate of Omega_m. We then analyze Chandra observations of a sample of eight distant clusters with redshift in the range 0.72 and 1.27 and evaluate the geometrical limits on the cosmological parameters Omega_m, Omega_Lambda and w by requiring that the gas fraction remains constant with respect to the look-back time. By combining these two independent probability distributions and using a priori distributions on both Omega_b and H0 peaked around primordial nucleosynthesis and HST-Key Project results respectively, we obtain that, at 95.4 per cent level of confidence, (i) w < -0.49, (ii) Omega_m = 0.34^+0.11_-0.05, Omega_Lambda = 1.30^+0.44_-1.09 for w=-1 (corresponding to the case for a cosmological constant), and (iii) Omega_m = 1-Omega_Lambda = 0.33^+0.07_-0.05 for a flat Universe. These results are in excellent agreement with the cosmic concordance scenario which combines constraints from the power spectrum of the Cosmic Microwave Background, the galaxy and cluster distribution, the evolution of the X-ray properties of galaxy clusters and the magnitude-redshift relation for distant type Ia supernovae. By combining our results with the latter method we further constrain Omega_Lambda =0.94^+0.28_-0.32 and w < -0.89 at the 2 sigma level.
description: 12 pages, A&A in press. Equation 7 has been corrected
3D reconstructions of EUV wave front heights and their influence on wave kinematics
Creators: name: Podladchikova, Tatiana
name: Veronig, Astrid M.
name: Dissauer, Karin
name: Temmer, Manuela
name: Podladchikova}, Olena
Publisher: name: arXiv
Year: 2019
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: EUV waves are large-scale disturbances in the solar corona initiated by coronal mass ejections. However, solar EUV images show only the wave fronts projections along the line-of-sight of the spacecraft. We perform 3D reconstructions of EUV wave front heights using multi-point observations from STEREO-A and STEREO-B, and study their evolution to properly estimate the EUV wave kinematics. We develop two different methods to solve the matching problem of the EUV wave crest on pairs of STEREO-A/-B images by combining epipolar geometry with the investigation of perturbation profiles. The proposed approaches are applicable at the early and maximum stage of the event when STEREO-A/-B see different facets of the EUV wave, but also at the later stage when the wave front becomes diffusive and faint. The techniques developed are demonstrated on two events observed at different separation of the STEREO spacecraft (42$^\circ$ and 91$^\circ$). For the 7 December 2007 event, we find that the emission of the EUV wave front mainly comes from a height range up to 90-104 Mm, decreasing later to 7-35 Mm. Including the varying height of the EUV wave front allows us to correct the wave kinematics for the projection effects, resulting in velocities in the range 217-266 km/s. For the 13 February 2009 event, the wave front height doubled from 54 to 93 Mm over 10 min, and the velocity derived is 205-208 km/s. In the two events under study, the corrected speeds differ by up to 25% from the uncorrected ones, depending on the wave front height evolution.
description: 19 pages, 10 figures, accepted for publication in the Astrophysical Journal