cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Phenotypic characterization of the epithelial and myoepithelial components in canine and feline mammary tumours
Creators: name: Beha, Germana <1983>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2014
Subjects: VET/03 Patologia generale e anatomia patologica veterinaria

description: In veterinary medicine, the ability to classify mammary tumours based on the molecular profile and also determine whether the immunophenotype of the regional lymph node and/or systemic metastases is equal to that of the primary tumor may be predictive on the estimation of the effectiveness of various cancer treatments that can be scheduled. Therefore, aims, developed as projects, of the past three years have been (1) to define the molecular phenotype of feline mammary carcinomas and their lymph node metastases according to a previous modified algorithm and to demonstrate the concordance or discordance of the molecular profile between the primary tumour and lymph node metastasis, (2) to analyze, in female dogs, the relationship between the primary mammary tumor and its lymph node metastasis based on immunohistochemical molecular characterization in order to develop the most specific prognostic-predictive models and targeted therapeutic options, and (3) to evaluate the molecular trend of cancer from its primary location to systemic metastases in three cats and two dogs with mammary tumors.
The studies on mammary tumours, particularly in dogs, have drawn gradually increasing attention not exclusively  to the epithelial component, but also to the myoepithelial cells. The lack of complete information on a valid panel of markers for the identification of these cells in the normal and neoplastic mammary gland and lack of investigation of immunohistochemical changes from an epithelial to a mesenchymal phenotype, was the aim of a parallel  research.
While investigating mammary tumours, it was noticed that only few studies had focused on the expression of CD117. Therefore, it was decided to further deepen the knowledge in order to characterize the immunohistochemical staining of CD117 in normal and neoplastic mammary tissue of the dog, and to correlate CD117 immunohistochemical results with mammary histotype, histological stage (invasiveness), Ki67 index and patient survival time.
Noncommutative gauge theory using covariant star product defined between Lie-valued differential forms
Creators: name: Chaichian, M.
name: Oksanen, M.
name: Tureanu, A.
name: Zet, G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We develop an internal gauge theory using a covariant star product. The space-time is a symplectic manifold endowed only with torsion but no curvature. It is shown that, in order to assure the restrictions imposed by the associativity property of the star product, the torsion of the space-time has to be covariant constant. An illustrative example is given and it is concluded that in this case the conditions necessary to define a covariant star product on a symplectic manifold completely determine its connection.
description: AMS-LaTeX 19 pages. v2: corrections in language and equations (typos), expanded sections 3-5, added references. v3: minor presentational and grammatical corrections, completed, corrected and reordered some references.
Increasing research creativity through open innovation platforms.
Creators: name: Koehler, Thomas
name: Skulimovski, Andrzej
Publisher: name: Zenodo
Year: 2019
Subjects: digitization, online creativity, e-science scenarios, global expert systems, open innovation platforms, recommenders

description: Creativity stimulation and creativity support systems (CSS) have been rapidly gaining importance in learning and research activities. However, the overall outcome is still lagging behind the other areas of creativity studies, even though the strong influence of recent developments in the context of digitization and Web 2.0 have been discussed in scholarly publications.

In this paper, the authors intend to link a creative research scenario recommendation and its impacts on research and innovation processes with the previous results regarding creativity stimulation in online learning systems and e-science platforms. The corresponding open innovation platform is currently being developed as part of a trans-European Horizon 2020 flagship project.

Even though scientists’ awareness of the respective potential of digitization and Web 2.0 technologies is still insufficient, the first underlying assumption for this research is that future recommendation engines designed for open learning and innovation platforms will be capable of measuring users’ creative engagementin the decision making process.

The corresponding open innovation platform is recently developed as part of a trans-European Horizon 2020 flagship Project. The authors are grateful for the support of the Research project “Training towards a society of data-savvy Information professionals to enable open leadership Innovation” (MOVING) financed by the EC, contract No. 693092.
description: Proceedings published biy the KICSS 2017 are of non-public character and only available to the conference participants.
Collapsing Spheres Satisfying An "Euclidean Condition"
Creators: name: Herrera, L.
name: Santos, N. O.
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the general properties of fluid spheres satisfying the heuristic assumption that their areas and proper radius are equal (the Euclidean condition). Dissipative and non-dissipative models are considered. In the latter case, all models are necessarily geodesic and a subclass of the Lemaitre-Tolman-Bondi solution is obtained. In the dissipative case solutions are non-geodesic and are characterized by the fact that all non-gravitational forces acting on any fluid element produces a radial three-acceleration independent on its inertial mass.
description: 1o pages, Latex. Title changed and text shortened to fit the version to appear in Gen.Rel.Grav.
Spherical Foams in Flat Space
Creators: name: Modes, Carl D.
name: Kamien, Randall D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Regular tesselations of space are characterized through their Schlafli symbols {p,q,r}, where each cell has regular p-gonal sides, q meeting at each vertex, and r meeting on each edge. Regular tesselations with symbols {p,3,3} all satisfy Plateau's laws for equilibrium foams. For general p, however, these regular tesselations do not embed in Euclidean space, but require a uniform background curvature. We study a class of regular foams on S^3 which, through conformal, stereographic projection to R^3 define irregular cells consistent with Plateau's laws. We analytically characterize a broad classes of bulk foam bubbles, and extend and explain recent observations on foam structure and shape distribution. Our approach also allows us to comment on foam stability by identifying a weak local maximum of A^(3/2)/V at the maximally symmetric tetrahedral bubble that participates in T2 rearrangements.
description: 4 pages, 4 included figures, RevTeX
Temperature independent current deficit due to induced quantum nanowire vibrations
Creators: name: Sonne, Gustav
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We consider electronic transport through a suspended voltage-biased nanowire. By coupling the tunneling current to a transverse magnetic field, vibrational modes of the wire are excited which influences the current-voltage characteristics of the system in novel ways through the induced electron-vibron interaction. From this analysis, we find that at high voltages the current through the suspended nanowire is offset from its non-vibrating ohmic value by an amount that is independent of both bias voltage and temperature. We also show that the corrections to the current from the back-action of the vibrating wire decay exponentially in the limit of high voltage, a result that holds even if the nanowire vibrational modes have been driven out of thermal equilibrium.
description: 4 pages, 3 figures
N to Delta transition form factors with Nf=2+1 domain wall fermions
Creators: name: Alexandrou, C.
name: Koutsou, G.
name: Negele, J. W.
name: O'Cais, A.
name: Proestos, Y.
name: Tsapalis, A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: The electromagnetic, axial and pseudoscalar nucleon to Delta form factors are calculated using dynamical domain wall fermions at a lattice spacing of a = 0.114 fm on a lattice of spatial size 2.74 fm and pion mass of 331 MeV. Pion pole dominance and the Goldberger-Treiman relations are examined.
description: 8 pages, 8 figures, Presented at the XXVII International Symposium on Lattice Field Theory, LATTICE 2009, July 26-31, 2009, Peking University, Beijing, China
Solving for tadpole coefficients in one-loop amplitudes
Creators: name: Britto, Ruth
name: Feng, Bo
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: One-loop amplitudes may be expanded in a basis of scalar integrals multiplied by rational coefficients. We relate the coefficient of the one-point integral to the coefficients of higher-point integrals, by considering the effects of introducing an additional, unphysical propagator, subject to certain conditions.
description: 9 pages. v2: Eq. (28) corrected, typos fixed, minor improvements
Rabinowitz Floer homology: A survey
Creators: name: Albers, Peter
name: Frauenfelder, Urs
Publisher: name: arXiv
Year: 2010
Subjects: subject: Symplectic Geometry (math.SG)
subject: Differential Geometry (math.DG)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 53D40, 37J10, 58J05

description: Rabinowitz Floer homology is the semi-infinite dimensional Morse homology associated to the Rabinowitz action functional used in the pioneering work of Rabinowitz. Gradient flow lines are solutions of a vortex-like equation. In this survey article we describe the construction of Rabinowitz Floer homology and its applications to symplectic and contact topology, global Hamiltonian perturbations and the study of magnetic fields.
description: 20 pages, 1 figure; v2: minor changes
Functional Determinants in Higher Derivative Lagrangian Theories
Creators: name: Di Criscienzo, Roberto
name: Zerbini, Sergio
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Motivated by the considerable success of alternative theories of gravity, we consider the toy model of a higher derivative Lagrangian theory, namely the Pais-Uhlenbeck oscillator studied in a recent paper by Hawking-Hertog. Its Euclidean Path Integral is studied with a certain detail and a pedagogical derivation of the propagator, which makes use of a Theorem due to Forman, is consequently proposed
description: 12 pages, no figures, error sign corrected in section 3, conclusions unchanged, one reference added
Kaniadakis holographic dark energy: observational constraints and global dynamics
Creators: name: Hernández-Almada, A.
name: Leon, Genly
name: Magaña, Juan
name: García-Aspeitia, Miguel A.
name: Motta, V.
name: Saridakis, Emmanuel N.
name: Yesmakhanova, Kuralay
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate Kaniadakis-holographic dark energy by confronting it with observations. We perform a Markov Chain Monte Carlo analysis using cosmic chronometers, supernovae type Ia, and Baryon Acoustic Oscillations data. Concerning the Kaniadakis parameter, we find that it is constrained around zero, namely around the value in which Kaniadakis entropy recovers standard Bekenstein-Hawking one. Additionally, for the present matter density parameter $Ω_m^{(0)}$, we obtain a value slightly smaller compared to $Λ$CDM scenario. Furthermore, we reconstruct the evolution of the Hubble, deceleration and jerk parameters extracting the deceleration-acceleration transition redshift as $z_T = 0.86^{+0.21}_{-0.14}$. Finally, performing a detailed local and global dynamical system analysis, we find that the past attractor of the Universe is the matter-dominated solution, while the late-time stable solution is the dark-energy-dominated one.
description: Version accepted in MNRAS
title: Análisis dinámico del flujo cerebral tras bypass extra-inracraneal en pacientes con enfermedad de Moyamoya basado en el estudio angiográfico de los territorios de perfusión
Creators: name: Perez Fernandez, Carmen
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Haemodynamics / Flow dynamics
subject: Angioscopy
subject: Catheter arteriography
subject: Neuroradiology brain

description: Objetivos
Material y método
Resultados
Conclusiones
Bibliografía
description: Objetivos:
Establecimiento de un método de cuantificación vasoselectiva de los territorios de perfusion cerebrales y su redistribucion tras realización de bypass extra-intracranial en pacientes con enfermedad de...
title: Lesiones hiperecogenicas en ecografia mamaria: ¿biopsiar o no biopsiar?, esa es la cuestión.
Creators: name: Gil Martín, Ana
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Neoplasia
subject: Biopsy
subject: Ultrasound
subject: Breast

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
Revisión del diagnótico diferencial delas masas hiperecogenicas en la mama. Determinar la indicación de biopsia atendiendo a la apariencia de la lesion en mamografia,
su localización y la historia clinica de la...
Active transport and cluster formation on 2D networks
Creators: name: Greulich, Philip
name: Santen, Ludger
Publisher: name: arXiv
Year: 2009
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We introduce a model for active transport on inhomogeneous networks embedded in a diffusive environment and investigate the formation of particle clusters. In the presence of a hard-core interaction, cluster sizes exhibit an algebraically decaying distribution in a large parameter regime, indicating the existence of clusters on all scales. The results are compared with a diffusion limited aggregation model and active transport on a regular network. For both models we observe aggregation of particles to clusters which are characterized by a finite size-scale if the relevant time-scales and particle densities are considered.
description: replaced; phenomenological analysis added
PBH formation from spherically symmetric hydrodynamical perturbations: a review
Creators: name: Escrivà, Albert
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Primordial black holes, which could have been formed in the very early Universe due to the collapse of large curvature fluctuations, are nowadays one of the most attractive and fascinating research areas in cosmology for their possible theoretical and observational implications. This review article presents the current results and developments on the conditions for primordial black hole formation from the collapse of curvature fluctuations in spherical symmetry on a Friedman-Lemaitre-Robertson-Walker background and its numerical simulation. We review the appropriate formalism for the conditions of primordial black hole formation, and we detail a numerical implementation. We then focus on different results regarding the threshold and the black hole mass using different sets of curvature fluctuations. Finally, we present the current state of analytical estimations for the primordial black hole formation threshold, contrasted with numerical simulations.
description: Invited review article. Published in the "Universe" journal on the Special Issue: Primordial Black Holes from Inflation. Feature Paper. 60 pages and 24 figures. v3: matches the published version
title: Cabeza y cuello después del tratamiento, te atreves?
Creators: name: Dolado Llorente, Ainara
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Head and neck
subject: Nuclear medicine
subject: Oncology
subject: PET-CT
subject: MR
subject: CT

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
Los pacientes con cáncer de cabeza y cuello se someten a controles de imagen periódicos después de finalizar el tratamiento. Este trabajo tiene como objetivo repasar la utilidad de las pruebas de imagen en el seguimiento de estos pacientes. La...
On a Theorem by Ekeland-Hofer
Creators: name: Albers, Peter
name: Frauenfelder, Urs
Publisher: name: arXiv
Year: 2010
Subjects: subject: Symplectic Geometry (math.SG)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 53D40, 37J10, 58J05

description: In [EH89, Theorem 1] Ekeland-Hofer prove that for a centrally symmetric, restricted contact type hypersurface in R^{2n} and for any global, centrally symmetric Hamiltonian perturbation there exists a leaf-wise intersection point. In this note we show that if we replace restricted contact type by star-shaped there exists infinitely many leaf-wise intersection points or a leaf-wise intersection point on a closed characteristic.
description: 5 pages, 1 figure; v2: minor changes
Integration of Cocycles and Lefschetz Number Formulae for Differential Operators
Creators: name: Ramadoss, Ajay C.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Algebra (math.QA)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: Let ${\mathcal E}$ be a holomorphic vector bundle on a complex manifold $X$ such that $\dim_{\mathbb C}X=n$. Given any continuous, basic Hochschild $2n$-cocycle $ψ_{2n}$ of the algebra ${\rm Diff}_n$ of formal holomorphic differential operators, one obtains a $2n$-form $f_{{\mathcal E},ψ_{2n}}(\mathcal D)$ from any holomorphic differential operator ${\mathcal D}$ on ${\mathcal E}$. We apply our earlier results [J. Noncommut. Geom. 2 (2008), 405-448; J. Noncommut. Geom. 3 (2009), 27-45] to show that $\int_X f_{{\mathcal E},ψ_{2n}}({\mathcal D})$ gives the Lefschetz number of $\mathcal D$ upto a constant independent of $X$ and ${\mathcal E}$. In addition, we obtain a "local" result generalizing the above statement. When $ψ_{2n}$ is the cocycle from [Duke Math. J. 127 (2005), 487-517], we obtain a new proof as well as a generalization of the Lefschetz number theorem of Engeli-Felder. We also obtain an analogous "local" result pertaining to B. Shoikhet's construction of the holomorphic noncommutative residue of a differential operator for trivial vector bundles on complex parallelizable manifolds. This enables us to give a rigorous construction of the holomorphic noncommutative residue of $\mathcal D$ defined by B. Shoikhet when ${\mathcal E}$ is an arbitrary vector bundle on an arbitrary compact complex manifold $X$. Our local result immediately yields a proof of a generalization of Conjecture 3.3 of [Geom. Funct. Anal. 11 (2001), 1096-1124].
Dynamical Mean-Field Theory within the Full-Potential Methods: Electronic structure of Ce-115 materials
Creators: name: Haule, Kristjan
name: Yee, Chuck-Hou
name: Kim, Kyoo
Publisher: name: arXiv
Year: 2009
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We implemented the charge self-consistent combination of Density Functional Theory and Dynamical Mean Field Theory (DMFT) in two full-potential methods, the Augmented Plane Wave and the Linear Muffin-Tin Orbital methods. We categorize the commonly used projection methods in terms of the causality of the resulting DMFT equations and the amount of partial spectral weight retained. The detailed flow of the Dynamical Mean Field algorithm is described, including the computation of response functions such as transport coefficients. We discuss the implementation of the impurity solvers based on hybridization expansion and an analytic continuation method for self-energy. We also derive the formalism for the bold continuous time quantum Monte Carlo method. We test our method on a classic problem in strongly correlated physics, the isostructural transition in Ce metal. We apply our method to the class of heavy fermion materials CeIrIn_5, CeCoIn_5 and CeRhIn_5 and show that the Ce 4f electrons are more localized in CeRhIn_5 than in the other two, a result corroborated by experiment. We show that CeIrIn_5 is the most itinerant and has a very anisotropic hybridization, pointing mostly towards the out-of-plane In atoms. In CeRhIn_5 we stabilized the antiferromagnetic DMFT solution below 3K, in close agreement with the experimental Néel temperature.
description: The implementation of Bold-CTQMC added and some test of the method added
Orbital eccentricity of the symbiotic star MWC 560
Creators: name: Zamanov, R. K.
name: Gomboc, A.
name: Stoyanov, K. A.
name: Stateva, I. K.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present projected rotational velocity measurements of the red giant in the symbiotic star MWC 560 (V694 Mon), using the high-resolution spectroscopic observations with the FEROS spectrograph. We find that the projected rotational velocity of the red giant is vsini = 8.2 +/- 1.5 km/s, and estimate its rotational period to be P_rot = 144-306 days. Using the theoretical predictions of tidal interaction and pseudosynchronization, we estimate the orbital eccentricity e=0.68-0.82. We briefly discuss the connection of our results with the photometric variability of the object.
description: AN, accepted
Control of the persistent currents in two interacting quantum rings through the Coulomb interaction and inter-ring tunneling
Creators: name: Castelano, L. K.
name: Hai, G. -Q.
name: Partoens, B.
name: Peeters, F. M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The persistent current in two vertically coupled quantum rings containing few electrons is studied. We find that the Coulomb interaction between the rings in the absence of tunneling affects the persistent current in each ring and the ground state configurations. Quantum tunneling between the rings alters significantly the ground state and the persistent current in the system.
description: accepted for publication in Phys. Rev. B
A state-space mixed membership blockmodel for dynamic network tomography
Creators: name: Xing, Eric P.
name: Fu, Wenjie
name: Song, Le
Publisher: name: arXiv
Year: 2009
Subjects: subject: Machine Learning (stat.ML)
subject: Molecular Networks (q-bio.MN)
subject: Quantitative Methods (q-bio.QM)
subject: Applications (stat.AP)
subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: In a dynamic social or biological environment, the interactions between the actors can undergo large and systematic changes. In this paper we propose a model-based approach to analyze what we will refer to as the dynamic tomography of such time-evolving networks. Our approach offers an intuitive but powerful tool to infer the semantic underpinnings of each actor, such as its social roles or biological functions, underlying the observed network topologies. Our model builds on earlier work on a mixed membership stochastic blockmodel for static networks, and the state-space model for tracking object trajectory. It overcomes a major limitation of many current network inference techniques, which assume that each actor plays a unique and invariant role that accounts for all its interactions with other actors; instead, our method models the role of each actor as a time-evolving mixed membership vector that allows actors to behave differently over time and carry out different roles/functions when interacting with different peers, which is closer to reality. We present an efficient algorithm for approximate inference and learning using our model; and we applied our model to analyze a social network between monks (i.e., the Sampson's network), a dynamic email communication network between the Enron employees, and a rewiring gene interaction network of fruit fly collected during its full life cycle. In all cases, our model reveals interesting patterns of the dynamic roles of the actors.
description: Published in at http://dx.doi.org/10.1214/09-AOAS311 the Annals of Applied Statistics (http://www.imstat.org/aoas/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Density profile, velocity anisotropy and line-of-sight external convergence of SLACS gravitational lenses
Creators: name: Guimarães, Antonio C. C.
name: Sodré, Laerte
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Data from 58 strong-lensing events surveyed by the Sloan Lens ACS Survey are used to estimate the projected galaxy mass inside their Einstein radii by two independent methods: stellar dynamics and strong gravitational lensing. We perform a joint analysis of these two estimates inside models with up to three degrees of freedom with respect to the lens density profile, stellar velocity anisotropy, and line-of-sight (LOS) external convergence, which incorporates the effect of the large-scale structure on strong lensing. A Bayesian analysis is employed to estimate the model parameters, evaluate their significance and compare models. We find that the data favor Jaffe's light profile over Hernquist's, but that any particular choice between these two does not change the qualitative conclusions with respect to the features of the system that we investigate. The density profile is compatible with an isothermal, being sightly steeper and having an uncertainty in the logarithmic slope of the order of 5% in models that take into account a prior ignorance on anisotropy and external convergence. We identify a considerable degeneracy between the density profile slope and the anisotropy parameter, which largely increases the uncertainties in the estimates of these parameters, but we encounter no evidence in favor of an anisotropic velocity distribution on average for the whole sample. An LOS external convergence following a prior probability distribution given by cosmology has a small effect on the estimation of the lens density profile, but can increase the dispersion of its value by nearly 40%.
description: 12 pages, 4 figures. Matches published version (ApJ)
Merging discrete Morse vector fields: a case of stubborn geometric parallelization
Creators: name: Lenseth, Douglas
name: Goldfarb, Boris
Publisher: name: arXiv
Year: 2021
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: We address the basic question in discrete Morse theory of combining discrete gradient fields that are partially defined on subsets of the given complex. This is a well-posed question when the discrete gradient field $V$ is generated using a fixed algorithm which has a local nature. One example is ProcessLowerStars, a widely used algorithm for computing persistent homology associated to a grey-scale image in 2D or 3D. While the algorithm for $V$ may be inherently local, being computed within stars of vertices and so embarrassingly parallelizable, in practical use it is natural to want to distribute the computation over patches $P_{i}$, apply the chosen algorithm to compute the fields $V_{i}$ associated to each patch, and then assemble the ambient field $V$ from these. Simply merging the fields from the patches, even when that makes sense, gives a wrong answer. We develop both very general merging procedures and leaner versions designed for specific, easy to arrange covering patterns.
description: 18 pages, 3 figures
Anomalous convective flows carve pinnacles and scallops in melting ice
Creators: name: Weady, Scott
name: Tong, Joshua
name: Zidovska, Alexandra
name: Ristroph, Leif
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We report on the shape dynamics of ice suspended in cold fresh water and subject to the natural convective flows generated during melting. Experiments reveal shape motifs for increasing far-field temperature: Sharp pinnacles directed downward at low temperatures, scalloped waves for intermediate temperatures between 5 and $7^\circ$C, and upward pointing pinnacles at higher temperatures. Phase-field simulations reproduce these morphologies, which are closely linked to the anomalous density-temperature profile of liquid water. Boundary layer flows yield pinnacles that sharpen with accelerating growth of tip curvature while scallops emerge from a Kelvin-Helmholtz-like instability caused by counterflowing currents that roll up to form vortex arrays. By linking the molecular-scale effects underlying water's density anomaly to the macro-scale flows that imprint the surface, these results show that the morphology of melted ice is a sensitive indicator of ambient temperature.
Theoretical study of the crystal and electronic properties of $α$-RuI$_3$
Creators: name: Zhang, Yang
name: Lin, Ling-Fang
name: Moreo, Adriana
name: Dagotto, Elbio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The material $α$-RuCl$_3$, with a two-dimensional Ru-honeycomb sublattice, has attracted considerable attention because it may be a realization of the Kitaev quantum spin liquid (QSL). Recently, a new honeycomb material, $α$-RuI$_3$, was prepared under moderate high-pressure and it is stable under ambient conditions. However, different from $α$-RuCl$_3$, $α$-RuI$_3$ was reported to be a paramagnetic metal without long-range magnetic order down to $0.35$ K. Here, the structural and electronic properties of the quasi-two-dimensional $α$-RuI$_3$ are theoretically studied. First, based on first-principles density functional theory (DFT) calculations, the ABC stacking honeycomb-layer $R\overline{3}$ (No. 148) structure is found to be the most likely stacking order for $α$-RuI$_3$ along the $c$-axis. Furthermore, both $R\overline{3}$ and $P\overline{3}1c$ are dynamically stable because no imaginary frequency modes were obtained in the phononic dispersion spectrum. Moreover, the different physical behavior of $α$-RuI$_3$ compared to $α$-RuCl$_3$ can be understood naturally. The strong hybridization between Ru $4d$ and I $5p$ orbitals decreases the effective atomic Hubbard repulsion $U$, leading the electrons of RuI$_3$ to be less localized than in RuCl$_3$. As a consequence, the effective repulsion $U$ is reduced from Cl to I, leading to the metallic nature of $α$-RuI$_3$. Based on the DFT+$U$ ($U_{\rm eff} = 2$ eV), plus spin-orbital coupling (SOC), we obtained a spin-orbit Mott insulating behavior for $α$-RuCl$_3$ and, by the same procedure, a metallic behavior for $α$-RuI$_3$, in good agreement with experimental results. Furthermore, when introducing a large (unrealistic) $U_{\rm eff} = 6$ eV, the spin-orbit Mott gap opens in $α$-RuI$_3$ as well, supporting the physical picture we are proposing.
description: 9 pages, 8 figures
Generalized Radiograph Representation Learning via Cross-supervision between Images and Free-text Radiology Reports
Creators: name: Zhou, Hong-Yu
name: Chen, Xiaoyu
name: Zhang, Yinghao
name: Luo, Ruibang
name: Wang, Liansheng
name: Yu, Yizhou
Publisher: name: arXiv
Year: 2021
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Pre-training lays the foundation for recent successes in radiograph analysis supported by deep learning. It learns transferable image representations by conducting large-scale fully-supervised or self-supervised learning on a source domain. However, supervised pre-training requires a complex and labor intensive two-stage human-assisted annotation process while self-supervised learning cannot compete with the supervised paradigm. To tackle these issues, we propose a cross-supervised methodology named REviewing FreE-text Reports for Supervision (REFERS), which acquires free supervision signals from original radiology reports accompanying the radiographs. The proposed approach employs a vision transformer and is designed to learn joint representations from multiple views within every patient study. REFERS outperforms its transfer learning and self-supervised learning counterparts on 4 well-known X-ray datasets under extremely limited supervision. Moreover, REFERS even surpasses methods based on a source domain of radiographs with human-assisted structured labels. Thus REFERS has the potential to replace canonical pre-training methodologies.
description: Accepted by Nature Machine Intelligence. The official version is at https://www.nature.com/articles/s42256-021-00425-9. Codes are available at https://github.com/funnyzhou/REFERS
Worst Configurations (Instantons) for Compressed Sensing over Reals: a Channel Coding Approach
Creators: name: Chilappagari, Shashi Kiran
name: Chertkov, Michael
name: Vasic, Bane
Publisher: name: arXiv
Year: 2010
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: We consider the Linear Programming (LP) solution of the Compressed Sensing (CS) problem over reals, also known as the Basis Pursuit (BasP) algorithm. The BasP allows interpretation as a channel-coding problem, and it guarantees error-free reconstruction with a properly chosen measurement matrix and sufficiently sparse error vectors. In this manuscript, we examine how the BasP performs on a given measurement matrix and develop an algorithm to discover the sparsest vectors for which the BasP fails. The resulting algorithm is a generalization of our previous results on finding the most probable error-patterns degrading performance of a finite size Low-Density Parity-Check (LDPC) code in the error-floor regime. The BasP fails when its output is different from the actual error-pattern. We design a CS-Instanton Search Algorithm (ISA) generating a sparse vector, called a CS-instanton, such that the BasP fails on the CS-instanton, while the BasP recovery is successful for any modification of the CS-instanton replacing a nonzero element by zero. We also prove that, given a sufficiently dense random input for the error-vector, the CS-ISA converges to an instanton in a small finite number of steps. The performance of the CS-ISA is illustrated on a randomly generated $120\times 512$ matrix. For this example, the CS-ISA outputs the shortest instanton (error vector) pattern of length 11.
description: Accepted to be presented at the IEEE International Symposium on Information Theory (ISIT 2010). 5 pages, 2 Figures. Minor edits from previous version. Added a new reference.
Additional file 2 of TBP and SNAP50 transcription factors bind specifically to the Pr77 promoter sequence from trypanosomatid non-LTR retrotransposons
Creators: name: Macías, Francisco
name: Afonso-Lehmann, Raquel
name: Carreira, Patricia E.
name: Thomas, M. Carmen
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 2: Figure S2. Determination of the preferential binding site/s of rTBP and nuclear proteins to the Pr77 sequence. a Binding kinetics of rTBP to dsPr77 and double-stranded oligo pairs mapping the Pr77 sequence by EMSA. A 0.33 nM concentration of 32P-dsPr77 or each 32P-labelled oligo-pair was preincubated with increasing concentrations (0.63, 3.17, 6.35 µM) of rTBP at 37 °C for 30 min. Control reactions were performed without protein. Reactions were loaded on 6% native polyacrylamide gels, and quantification was carried out in a PhosphorImager. b Binding specificity of TBP to the Pr77 sequence by EMSA competition. EMSA was carried out after preincubation of 0.125 nM 32P-dsPr77 with 1.58 μM rTBP and with different concentrations (as indicated, fold excess ranging from 5 to 500 times) of each cold oligo pair as DNA competitors. Control reactions were performed in a and b without protein. Reactions were loaded on 6% native polyacrylamide gels, and the results were visualized in a PhosphorImager. Shifted bands are indicated with black arrowheads, and the radiolabelled free form of each probe is indicated with an asterisk.
Building on advanced nursing practice and intersectorality to improve care and service pathways for refugees: from action research to a pilot project, Quebec, Canada
Creators: name: Maillet, Lara
name: Goudet, Anna
name: Vanharen, Marion
name: Abou-Malham, Sabina
name: Déry, Johanne
name: Charest, Stéphanie
name: Desjardins, France
Publisher: name: Zenodo
Year: 2024
Subjects: Health
Continuity of care
Refugees
Nurse
Intersectoral network

description: In response to the lack of access and continuity of care for refugees, a community nursing intervention has been implemented since 2019, following joint reflection between users, caregivers, clinicians, decision-makers, and researchers. This intervention is based on advanced nursing practice and an existing intersectoral network in Sherbrooke, Canada.

The aim of this project was to improve the accessibility and continuity of care and health services for vulnerable populations, in a perspective of integrated care. The aim was to offer both a population-based and specific intervention for refugees and asylum seekers.
LISA as a dark energy probe
Creators: name: Arun, K G
name: Mishra, Chandra Kant
name: Broeck, Chris Van Den
name: Iyer, B R
name: Sathyaprakash, B S
name: Sinha, Siddhartha
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Recently it was shown that the inclusion of higher signal harmonics in the inspiral signals of binary supermassive black holes (SMBH) leads to dramatic improvements in parameter estimation with the Laser Interferometer Space Antenna (LISA). In particular, the angular resolution becomes good enough to identify the host galaxy or galaxy cluster, in which case the redshift can be determined by electromagnetic means. The gravitational wave signal also provides the luminosity distance with high accuracy, and the relationship between this and the redshift depends sensitively on the cosmological parameters, such as the equation-of-state parameter $w=p_{\rm DE}/ρ_{\rm DE}$ of dark energy. With a single binary SMBH event at $z < 1$ having appropriate masses and orientation, one would be able to constrain $w$ to within a few percent. We show that, if the measured sky location is folded into the error analysis, the uncertainty on $w$ goes down by an additional factor of 2-3, leaving weak lensing as the only limiting factor in using LISA as a dark energy probe.
description: 11pages, 1 Table, minor changes in text, accepted for publication in Classical and Quantum Gravity (special issue for proceedings of 7th LISA symposium)
The Effective Field Theory of Vector-Tensor Theories
Creators: name: Aoki, Katsuki
name: Gorji, Mohammad Ali
name: Mukohyama, Shinji
name: Takahashi, Kazufumi
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate a systematic formulation of vector-tensor theories based on the effective field theory (EFT) approach. The input of our EFT is that the spacetime symmetry is spontaneously broken by the existence of a preferred timelike direction in accordance with the cosmological principle. After clarifying the difference of the symmetry breaking pattern from the conventional EFT of inflation/dark energy, we find an EFT description of vector-tensor theories around the cosmological background. This approach not only serves as a unified description of vector-tensor theories but also highlights universal differences between the scalar-tensor theories and the vector-tensor theories. The theories having different symmetry breaking patterns are distinguished by a phenomenological function and consistency relations between the EFT coefficients. We study the linear cosmological perturbations within our EFT framework and discuss the characteristic properties of the vector-tensor theories in the context of dark energy. In particular, we compute the effective gravitational coupling and the slip parameter for the matter density contrast in terms of the EFT coefficients.
description: 39 pages + appendices, 1 figure, published version
Mathematical modeling of powder-snow avalanche flows
Creators: name: Dutykh, Denys
name: Acary-Robert, Céline
name: Bresch, Didier
Publisher: name: arXiv
Year: 2009
Subjects: subject: Geophysics (physics.geo-ph)
subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: Numerical Analysis (math.NA)
subject: Classical Physics (physics.class-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Powder-snow avalanches are violent natural disasters which represent a major risk for infrastructures and populations in mountain regions. In this study we present a novel model for the simulation of avalanches in the aerosol regime. The second scope of this study is to get more insight into the interaction process between an avalanche and a rigid obstacle. An incompressible model of two miscible fluids can be successfully employed in this type of problems. We allow for mass diffusion between two phases according to the Fick's law. The governing equations are discretized with a contemporary fully implicit finite volume scheme. The solver is able to deal with arbitrary density ratios. Several numerical results are presented. Volume fraction, velocity and pressure fields are presented and discussed. Finally we point out how this methodology can be used for practical problems.
description: 27 pages, 13 figures. Minor changes. A few references were added. Other author's papers can be downloaded at http://www.lama.univ-savoie.fr/~dutykh/
Non-financial disclosure in the insurance sector. Investigation into the materiality of qualitative and quantitative sustainability KPI
Creators: name: Bosoni, Ernestina
name: Marinoni, Marco A.
Publisher: name: Economia Aziendale Online -
Year: 2025
Subjects: Non-financial disclosure, Insurance sector, Materiality, KPI

description: The availability of ESG information plays an increasingly important role for stakeholders (See D’Anselmi, De Girolamo, 2017; Garizadeh-Beiragh et al. 2020; Kraft, 2022). Directive 2014/95/EU testifies to the consolidation of CSR in corporate reporting processes, as a moment of change not only organizational, but above all, cultural. To date, companies have a fair degree of discretion in the way they communicate non-financial information and in the choice of performance indicators; hence the need to investigate the existence of specificities attributable to the sector to which they belong, in order to increase the significance of sustainability reports for all stakeholders. The empirical research concerned the sustainability reports in the period 2019-2022 of companies in the insurance sector belonging to the Euro Stoxx Large Europe ESG. The survey mapped the type and number of performance indicators used in the sustainability reports of the sample, according to the perspectives of the GRI Standards. Not all companies have prepared their reports in accordance with the GRI; therefore, some aspects – such as the economic value generated and distributed; materiality analysis; stakeholder engagement policies – are not treated by all insurance companies in the same way and with the same level of detail. In general, the dimensions of interest of the information are: community, personnel, customers, suppliers, environment and stakeholders. From the results of the research, it is possible to deduce the incidence of qualitative and quantitative indicators on the total. The distribution of indicators by area of interest shows in the same year, in line with previous years, a prevalence of indicators relating to the personal sphere (220 in number), with an incidence on the total of 30.51%. The comparison with previous years is interesting, from which emerges, in general, an increase in the three-year period of the mapped indicators, from 583 in 2019 to 721 in 2021.
description: Economia Aziendale Online -, Vol 16, No 1 (2025): ISSUE 1/2025
On the Transversal Number and VC-Dimension of Families of Positive Homothets of a Convex Body
Creators: name: Naszódi, Márton
name: Taschuk, Steven
Publisher: name: arXiv
Year: 2009
Subjects: subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 52A35 (Primary), 05D15 (Secondary)

description: Let F be a family of positive homothets (or translates) of a given convex body K in R^n. We investigate two approaches to measuring the complexity of F. First, we find an upper bound on the transversal number $τ(F)$ of F in terms of $n$ and the independence number $ν(F)$. This question is motivated by a problem of Grünbaum. Our bound $τ(F)\le 2^n \binom{2n}{n} (n \log n + \log\log n + 5n) ν(F)$ is exponential in n, an improvement from the previously known bound of Kim, Nakprasit, Pelsmajer and Skokan, which was of order n^n. By a lower bound, we show that the right order of magnitude is exponential in n. Next, we consider another measure of complexity, the Vapnik--Chervonenkis dimension of F. We prove that this quantity is at most 3 if n=2 and is infinite for some F if n>2. This settles a conjecture of Günbaum: Show that the maximum dual VC-dimension of a family of positive homothets of a given convex body K in R^n is n+1. This conjecture was disproved by Naiman and Wynn, who constructed a counterexample of dual VC-dimension $\lfloor 3n/2\rfloor$. Our result implies that no upper bound exists.
description: 7 pages. 3 figures.