cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Metadata to describe the dataset on involved actors and their roles in the governance of innovative contracts for agri-environmental and climate schemes
Creators: name: Sattler, Claudia
name: Barghusen, Rena
name: Bredemeier, Birte
name: Dutilly, Céline
name: Prager, Katrin
Publisher: name: Amsterdam [u.a.] : Elsevier
Year: 2023
Subjects: subject: Governance actors
subject: Governance of ecosystem services
subject: Governance tasks
subject: Institutional analysis
subject: Payments for ecosystem services
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: Agri-environmental and climate schemes are an important policy instrument in the Common Agricultural Policy of the European Union to maintain biodiversity and safeguard ecosystem services provision for human wellbeing. In the presented dataset, we analyzed 19 innovative contracts for agri-environmental and climate schemes from six European countries, representing examples of four different contract types: result-based, collective, land tenure, and value chain contracts. Our analytical approach comprised three steps: In the first step, we used a method mix combining literature review, web search, and expert consultation to identify potential case examples for the innovative contracts. In the second step, we employed a survey, which was structured in accordance with Ostrom's institutional analysis and development framework to collect detailed information on each contract. The survey was either filled in by us authors, based on information retrieved from websites and other data sources, or by experts directly involved in the different contracts. Based on the collected data, in the third step, an in-depth analysis was conducted on the public, private, and civil actors involved from different governance levels (local, regional, national, or international) and the roles these actors perform in contract governance. The dataset generated through these three steps contains 84 data files, which includes tables, figures, maps, and a text file. The dataset can be re-used by all interested in result-based, collective, land tenure, and value chain contracts for agri-environmental and climate schemes. Each contract is characterized in great detail by 34 variables making the dataset suitable for further institutional and governance analysis.
A Short Mechanized Proof of the Church-Rosser Theorem by the Z-property for the $λβ$-calculus in Nominal Isabelle
Creators: name: Nagele, Julian
name: van Oostrom, Vincent
name: Sternagel, Christian
Publisher: name: arXiv
Year: 2016
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: We present a short proof of the Church-Rosser property for the lambda-calculus enjoying two distinguishing features: Firstly, it employs the Z-property, resulting in a short and elegant proof; and secondly, it is formalized in the nominal higher-order logic available for the proof assistant Isabelle/HOL.
description: 5th International Workshop on Confluence
Exact Lagrangian Fillings of Legendrian $(2,n)$ torus links
Creators: name: Pan, Yu
Publisher: name: arXiv
Year: 2016
Subjects: subject: Symplectic Geometry (math.SG)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57R17, 53D42

description: For a Legendrian $(2,n)$ torus knot or link with maximal Thurston-Bennequin number, Ekholm, Honda, and Kálmán constructed $C_n$ exact Lagrangian fillings, where $C_n$ is the $n$-th Catalan number. We show that these exact Lagrangian fillings are pairwise non-isotopic through exact Lagrangian isotopy. To do that, we compute the augmentations induced by the exact Lagrangian fillings $L$ to $\mathbb{Z}_2[H_1(L)]$ and distinguish the resulting augmentations.
description: 19 pages, 15 figures
Spin-Orbit Coupling Induced Spin Squeezing in Three-Component Bose Gases
Creators: name: Huang, X. Y.
name: Sun, F. X.
name: Zhang, W.
name: He, Q. Y.
name: Sun, C. P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We observe spin squeezing in three-component Bose gases where all three hyperfine states are coupled by synthetic spin-orbit coupling. This phenomenon is a direct consequence of spin-orbit coupling, as can be seen clearly from an effective spin Hamiltonian. By solving this effective model analytically with the aid of a Holstein-Primakoff transformation for spin-1 system in the low excitation limit, we conclude that the spin-nematic squeezing, a novel category of spin squeezing existing exclusively in large spin systems, is enhanced with increasing spin-orbit intensity and effective Zeeman field, which correspond to Rabi frequency and two-photon detuning within the Raman scheme for synthetic spin-orbit coupling, respectively. These trends of dependence are in clear contrast to spin-orbit coupling induced spin squeezing in spin-1/2 systems. We also analyze the effects of harmonic trap and interaction with realistic experimental parameters numerically, and find that a strong harmonic trap favors spin-nematic squeezing. We further show spin-nematic squeezing can be interpreted as two-mode entanglement or two-spin squeezing at low excitation. Our findings can be observed in ^{87}Rb gases with existing techniques of synthetic spin-orbit coupling and spin-selectively imaging.
description: 6 pages, 4 figures
Structural and superelastic properties of Fe–Mn–Al–Ni shape memory alloy sheets produced on industrial process routes by hot rolling
Creators: name: Bauer, André
name: Vollmer, Malte
name: Viebranz, Vincent Fabian
name: Maier, Hans Jürgen
name: Niendorf, Thomas
Publisher: name: Rio de Janeiro : Elsevier
Year: 2023
Subjects: subject: Abnormal grain growth
subject: FeMnAlNi
subject: Industrial process route
subject: Martensitic phase transformation
subject: Mechanical properties
subject: Shape memory alloy
subject: Dewey Decimal Classification::600 | Technik::670 | Industrielle und handwerkliche Fertigung

description: In the present study the structural and functional properties of Fe–Mn–Al–Ni shape memory alloy sheets produced on an industrial process route focusing on hot rolling were investigated. The as-processed condition is characterized by a high fraction of the non-transforming γ-phase, which ensures good workability, but is associated with poor superelasticity. The alloy shows good structural properties with a yield strength of about 600 MPa, which is well above the usual transformation stress related to the martensitic phase transformation for the investigated alloy composition. After solution annealing, a microstructure showing no preferred orientation being characterized by distinctly larger grains is present. The results obtained reveal that the previous thermo-mechanical processing had no impact on the subsequent texture, however, provided a sufficient amount of driving force for abnormal grain growth. Imposed by a cyclic heat treatment, oligocrystalline structures with grain sizes above 10 mm can be achieved in the industrially processed material, which show superelastic properties similar to material processed in small batches in the laboratory.
Numerical computation of triangular cavity flows by a Lagrange-Galerkin scheme with a locally linearized velocity
Creators: name: Tabata, Masahisa
name: Uchiumi, Shinya
Publisher: name: arXiv
Year: 2016
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: We show numerical results of triangular cavity flow problems solved by a Lagrange-Galerkin scheme free from numerical quadrature. The scheme has recently developed by us, where a locally linearized velocity and the backward Euler approximation are used in finding the position of fluid particle at the previous time step. Since the scheme can be implemented exactly as it is, the theoretical stability and convergence results are assured, while the conventional Lagrange-Galerkin schemes may encounter the instability caused by numerical quadrature errors. The scheme is employed to solve cavity flow problems in triangular domains, where we observe the bifurcation of stationary solutions and the patterns of streamlines.
Disk-corona modeling for spectral index and luminosity correlation of tidal disruption events
Creators: name: Mageshwaran, T.
name: Bhattacharyya, Sudip
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present a relativistic disk-corona model for a steady state advective accretion disk to explain the UV to X-ray spectral index $α_{\text{OX}}$ evolution of \textbf{four} tidal disruption event (TDE) sources XMMSL2J1446, XMMSL1J1404, XMMSL1J0740, \textbf{and AT2018fyk}. The viscous stress in our model depends on gas ($P_g$) and total ($P_t$) pressures as $τ_{rϕ} \propto P_g^μ P_t^{1-μ}$, where $μ$ is a constant. We compare various steady and time-dependent sub-Eddington TDE accretion models along with our disk-corona model to the observed $α_{\text{OX}}$ of TDE sources and find that the disk-corona model agrees with the observations better than the other models. We find that $μ$ is much smaller than unity for TDE sources XMMSL2J1446, XMMSL1J1404, and XMMSL1J0740. We also compare the relativistic model with a non-relativistic disk-corona model. The relativistic accretion dynamics reduce the spectral index relative to the non-relativistic accretion by increasing the energy transport to the corona. We estimate the mass accretion rate for all the sources and find that the observed luminosity follows a nearly linear relation with the mass accretion rate. The ratio of X-ray luminosity from the disk to the corona increases with the mass accretion rate. The observed $α_{\text{OX}}$ shows positive and negative correlations with luminosity. The disk-corona model explains the negative correlation seen in the TDE sources XMMSL1J0740, XMMSL2J1446, and XMMSL1J1404. However, TDE AT2018fyk shows a positive correlation at higher luminosity and shows a better fit when a simple spherical adiabatic outflow model is added to the relativistic disk-corona model. Even though the disk luminosity dominates at a higher mass accretion rate, we show that the accretion models without a corona are unable to explain the observations, and the presence of a corona is essential.
description: 23 pages, 18 figures, 4 tables, accepted for publication in Physical Review D
Structural Diversity in Lithium Carbides
Creators: name: Lin, Yangzheng
name: Strobel, Timothy A.
name: Cohen, R. E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The lithium-carbon binary system possesses a broad range of chemical compounds, which exhibit fascinating chemical bonding characteristics that give rise diverse and technologically important properties. While lithium carbides with various compositions have been studied or suggested previously, the crystal structures of these compounds are far from well understood. In this work we present the first comprehensive survey of all ground state (GS) structures of lithium carbides over a broad range of thermodynamic conditions, using \textit{ab initio} density functional theory (DFT) crystal structure searching methods. Thorough searches were performed for 29 stoichiometries ranging from Li$_{12}$C to LiC$_{12}$ at 0 GPa as well as 40 GPa. Based on formation enthalpies from optimized van der Waals density functional calculations, three thermodynamically stable phases (Li$_4$C$_3$, Li$_2$C$_2$ and LiC$_{12}$) were identified at 0 GPa, and seven thermodynamically stable phases (Li$_8$C, Li$_6$C, Li$_4$C, Li$_8$C$_3$, Li$_2$C, Li$_3$C$_4$, and Li$_2$C$_3$) were predicted at 40 GPa. A rich diversity of carbon bonding, including monomers, dimers, trimers, nanoribbons, sheets and frameworks, was found within these structures, and the dimensionality of carbon connectivity existing within each phase was observed to increase with increasing carbon concentration. Of particular interest, we find that the well-known composition LiC$_6$ is actually a metastable one. We also find a unique coexistence of carbon monomers and dimers within the predicted thermodynamically stable phase Li$_8$C$_3$, and different widths of carbon nanoribbons coexist in a metastable phase of Li$_2$C$_2$ (\textit{Imm}2). Interesting mixed \textit{sp}$^2$-\textit{sp}$^3$ carbon frameworks are predicted in metastable phases with composition LiC$_6$.
Carbon dredge-up required to explain the Gaia white dwarf colour-magnitude bifurcation
Creators: name: Blouin, Simon
name: Bédard, Antoine
name: Tremblay, Pier-Emmanuel
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The Gaia colour--magnitude diagram reveals a striking separation between hydrogen-atmosphere white dwarfs and their helium-atmosphere counterparts throughout a significant portion of the white dwarf cooling track. However, pure-helium atmospheres have Gaia magnitudes that are too close to the pure-hydrogen case to explain this bifurcation. To reproduce the observed split in the cooling sequence, it has been shown that trace amounts of hydrogen and/or metals must be present in the helium-dominated atmospheres of hydrogen-deficient white dwarfs. Yet, a complete explanation of the Gaia bifurcation that takes into account known constraints on the spectral evolution of white dwarfs has thus far not been proposed. In this work, we attempt to provide such a holistic explanation by performing population synthesis simulations coupled with state-of-the-art model atmospheres and evolutionary calculations that account for element transport in the envelopes of white dwarfs. By relying on empirically grounded assumptions, these simulations successfully reproduce the bifurcation. We show that the convective dredge-up of optically undetectable traces of carbon from the deep interior is crucial to account for the observations. Neither the convective dilution/mixing of residual hydrogen nor the accretion of hydrogen or metals can be the dominant drivers of the bifurcation. Finally, we emphasize the importance of improving theoretical models for the average ionization level of carbon in warm dense helium, which governs the shape of the diffusive tail of carbon and in turn the predicted amount of dredged-up carbon.
description: Accepted for publication in MNRAS, minor changes following reports from reviewers
Sampling to estimate the average number of bunches per vine: table of confidence intervals for estimation errors
Creators: name: Oger, Baptiste
name: Laurent, Cécile
name: Vismara, Philippe
name: Tisseyre, Bruno
Publisher: name: Zenodo
Year: 2024

description: This document is an appendix to the technical review "How to better estimate bunch number at field level?" published in IVES Technical Reviews, vine and wine.

 

How to read this document?

The following pages present 5 tables to obtain the confidence interval bounds for the average number of bunches per vine with confidence levels of 99%, 95%, 90%, 75%, and 50%.These tables can be read using two sample properties:•    The sample size that correspond to the number of vines that have been observed;•    The Coefficient of Variation (CV) of the sample computed from its standard deviation and its mean.These two values should be reported in the tables using the columns for the sample size and the rows for the CV. The estimation error associated with the sample will then have a 99%, 95%, 90%, 75%, and 50% chance of being lower than the obtained value, depending on the chosen table.

 

To obtain more information on how to use these tables, please refer to the technical note.

To understand how these tables were computed, please refer to the following article:

Oger, B., Laurent, C., Vismara, P., & Tisseyre, B. (2023a). How to better estimate bunch number at vineyard level?. OENO One, 57(3), 27-39. https://doi.org/10.20870/oeno-one.2023.57.3.7404
SlipCover: Near Zero-Overhead Code Coverage for Python
Creators: name: Pizzorno, Juan Altmayer
name: Berger, Emery D
Publisher: name: arXiv
Year: 2023
Subjects: subject: Software Engineering (cs.SE)
subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences
subject: D.2.5

description: Coverage analysis is widely used but can suffer from high overhead. This overhead is especially acute in the context of Python, which is already notoriously slow (a recent study observes a roughly 30x slowdown vs. native code). We find that the state-of-the-art coverage tool for Python, coverage$.$py, introduces a median overhead of 180% with the standard Python interpreter. Slowdowns are even more extreme when using PyPy, a JIT-compiled Python implementation, with coverage$.$py imposing a median overhead of 1,300%. This performance degradation reduces the utility of coverage analysis in most use cases, including testing and fuzzing, and precludes its use in deployment. This paper presents SlipCover, a novel, near-zero overhead coverage analyzer for Python. SlipCover works without modifications to either the Python interpreter or PyPy. It first processes a program's AST to accurately identify all branches and lines. SlipCover then dynamically rewrites Python bytecodes to add lightweight instrumentation to each identified branch and line. At run time, SlipCover periodically de-instruments already-covered lines and branches. The result is extremely low overheads -- a median of just 5% -- making SlipCover suitable for use in deployment. We show its efficiency can translate to significant increases in the speed of coverage-based clients. As a proof of concept, we integrate SlipCover into TPBT, a targeted property-based testing system, and observe a 22x speedup.
description: Accepted to ISSTA 2023
Octahedral rotation patterns in strained EuFeO3 and other Pbnm perovskite films: Implications for hybrid improper ferroelectricity
Creators: name: Choquette, A. K.
name: Smith, C. R.
name: Sichel-Tissot, R. J.
name: Moon, E. J.
name: Scafetta, M. D.
name: Di Gennaro, E.
name: Granozio, F. Miletto
name: Karapetrova, E.
name: May, S. J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report the relationship between epitaxial strain and the crystallographic orientation of the in-phase rotation axis and A-site displacements in Pbnm-type perovskite films. Synchrotron diffraction measurements of EuFeO3 films under strain states ranging from 2% compressive to 0.9% tensile on cubic or rhombohedral substrates exhibit a combination of a-a+c- and a+a-c- rotational patterns. We compare the EuFeO3 behavior with previously reported experimental and theoretical work on strained Pbnm-type films on non-orthorhombic substrates, as well as additional measurements from LaGaO3, LaFeO3, and Eu0.7Sr0.3MnO3 films on SrTiO3. Compiling the results from various material systems reveals a general strain dependence in which compressive strain strongly favors a-a+c- and a+a-c- rotation patterns and tensile strain weakly favors a-a-c+ structures. In contrast, EuFeO3 films grown on Pbnm-type GdScO3 under 2.3% tensile strain take on a uniform a-a+c- rotation pattern imprinted from the substrate, despite strain energy considerations that favor the a-a-c+ pattern. These results point to the use of substrate imprinting as a more robust route than strain for tuning the crystallographic orientations of the octahedral rotations and A-site displacements needed to realize rotation-induced hybrid improper ferroelectricity in oxide heterostructures.
description: submitted to PRB, comments welcomed
Algorithms for Generalized Cluster-wise Linear Regression
Creators: name: Park, Young Woong
name: Jiang, Yan
name: Klabjan, Diego
name: Williams, Loren
Publisher: name: arXiv
Year: 2016
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Cluster-wise linear regression (CLR), a clustering problem intertwined with regression, is to find clusters of entities such that the overall sum of squared errors from regressions performed over these clusters is minimized, where each cluster may have different variances. We generalize the CLR problem by allowing each entity to have more than one observation, and refer to it as generalized CLR. We propose an exact mathematical programming based approach relying on column generation, a column generation based heuristic algorithm that clusters predefined groups of entities, a metaheuristic genetic algorithm with adapted Lloyd's algorithm for K-means clustering, a two-stage approach, and a modified algorithm of Sp{ä}th \cite{Spath1979} for solving generalized CLR. We examine the performance of our algorithms on a stock keeping unit (SKU) clustering problem employed in forecasting halo and cannibalization effects in promotions using real-world retail data from a large supermarket chain. In the SKU clustering problem, the retailer needs to cluster SKUs based on their seasonal effects in response to promotions. The seasonal effects are the results of regressions with predictors being promotion mechanisms and seasonal dummies performed over clusters generated. We compare the performance of all proposed algorithms for the SKU problem with real-world and synthetic data.
SDSS-DR12 Bulk Stellar Spectral Classification: Artificial Neural Networks Approach
Creators: name: Kheirdastan, S.
name: Bazarghan, M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: This paper explores the application of Probabilistic Neural Network (PNN), Support Vector Machine (SVM) and Kmeans clustering as tools for automated classification of massive stellar spectra.
description: 17 pages, 6 figures in Astrophysics and Space Science,2016
A stable and convergent method for Hodge decomposition of fluid-solid interaction
Creators: name: Yoon, Gangjoon
name: Min, Chohong
name: Kim, Seick
Publisher: name: arXiv
Year: 2016
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 76D03, 65N06, 76M20 (Primary), 35Q30, 35J25 (Secondary)

description: Fluid-solid interaction has been a challenging subject due to their strong nonlinearity and multidisciplinary nature. Many of the numerical methods for solving FSI problems have struggled with non-convergence and numerical instability. In spite of comprehensive studies, it has been still a challenge to develop a method that guarantees both convergence and stability. Our discussion in this work is restricted to the interaction of viscous incompressible fluid flow and a rigid body. We take the monolithic approach by Gibou and Min that results in an extended Hodge projection. The projection updates not only the fluid vector field but also the solid velocities. We derive the equivalence of the extended Hodge projection to the Poisson equation with non-local Robin boundary condition. We prove the existence, uniqueness, and regularity for the weak solution of the Poisson equation, through which the Hodge projection is shown to be unique and orthogonal. Also, we show the stability of the projection in a sense that the projection does not increase the total kinetic energy of fluid and solid. Also, we discusse a numerical method as a discrete analogue to the Hodge projection, then we show that the unique decomposition and orthogonality also hold in the discrete setting. As one of our main results, we prove that the numerical solution is convergent with at least the first order accuracy. We carry out numerical experiments in two and three dimensions, which validate our analysis and arguments.
Anisotropic cosmological solutions in massive vector theories
Creators: name: Heisenberg, Lavinia
name: Kase, Ryotaro
name: Tsujikawa, Shinji
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In beyond-generalized Proca theories including the extension to theories higher than second order, we study the role of a spatial component $v$ of a massive vector field on the anisotropic cosmological background. We show that, as in the case of the isotropic cosmological background, there is no additional ghostly degrees of freedom associated with the Ostrogradski instability. In second-order generalized Proca theories we find the existence of anisotropic solutions on which the ratio between the anisotropic expansion rate $Σ$ and the isotropic expansion rate $H$ remains nearly constant in the radiation-dominated epoch. In the regime where $Σ/H$ is constant, the spatial vector component $v$ works as a dark radiation with the equation of state close to $1/3$. During the matter era, the ratio $Σ/H$ decreases with the decrease of $v$. As long as the conditions $|Σ| \ll H$ and $v^2 \ll ϕ^2$ are satisfied around the onset of late-time cosmic acceleration, where $ϕ$ is the temporal vector component, we find that the solutions approach the isotropic de Sitter fixed point ($Σ=0=v$) in accordance with the cosmic no-hair conjecture. In the presence of $v$ and $Σ$ the early evolution of the dark energy equation of state $w_{\rm DE}$ in the radiation era is different from that in the isotropic case, but the approach to the isotropic value $w_{\rm DE}^{\rm (iso)}$ typically occurs at redshifts $z$ much larger than 1. Thus, apart from the existence of dark radiation, the anisotropic cosmological dynamics at low redshifts is similar to that in isotropic generalized Proca theories. In beyond-generalized Proca theories the only consistent solution to avoid the divergence of a determinant of the dynamical system corresponds to $v=0$, so $Σ$ always decreases in time.
description: 20 pages, 4 figures
Divide and...conquer? On the limits of algorithmic approaches to syntactic semantic structure
Creators: name: Krivochen, Diego Gabriel
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computation and Language (cs.CL)
subject: Formal Languages and Automata Theory (cs.FL)
subject: FOS: Computer and information sciences
subject: 68Q42

description: In computer science, divide and conquer (D&C) is an algorithm design paradigm based on multi-branched recursion. A D&C algorithm works by recursively and monotonically breaking down a problem into sub problems of the same (or a related) type, until these become simple enough to be solved directly. The solutions to the sub problems are then combined to give a solution to the original problem. The present work identifies D&C algorithms assumed within contemporary syntactic theory, and discusses the limits of their applicability in the realms of the syntax semantics and syntax morphophonology interfaces. We will propose that D&C algorithms, while valid for some processes, fall short on flexibility given a mixed approach to the structure of linguistic phrase markers. Arguments in favour of a computationally mixed approach to linguistic structure will be presented as an alternative that offers advantages to uniform D&C approaches.
description: Ms. 36 pages
Hall-plot of the phase diagram for Ba(Fe1-xCox)2As2
Creators: name: Iida, Kazumasa
name: Grinenko, Vadim
name: Kurth, Fritz
name: Ichinose, Ataru
name: Tsukada, Ichiro
name: Ahrens, Eike
name: Pukenas, Aurimas
name: Chekhonin, Paul
name: Skrotzki, Werner
name: Teresiak, Angelika
name: Huehne, Ruben
name: Aswartham, Saicharan
name: Wurmehl, Sabine
name: Moench, Ingolf
name: Erbe, Manuela
name: Haenisch, Jens
name: Holzapfel, Bernhard
name: Drechsler, Stefan-Ludwig
name: Efremov, Dmitri V.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The Hall effect is a powerful tool for investigating carrier type and density. For single-band materials, the Hall coefficient is traditionally expressed simply by $R_H^{-1} = -en$, where $e$ is the charge of the carrier, and $n$ is the concentration. However, it is well known that in the critical region near a quantum phase transition, as it was demonstrated for cuprates and heavy fermions, the Hall coefficient exhibits strong temperature and doping dependencies, which can not be described by such a simple expression, and the interpretation of the Hall coefficient for Fe-based superconductors is also problematic. Here, we investigate thin films of Ba(Fe$_{1-x}$Co$_x$)$_2$As$_2$ with compressive and tensile in-plane strain in a wide range of Co doping. Such in-plane strain changes the band structure of the compounds, resulting in various shifts of the whole phase diagram as a function of Co doping. We show that the resultant phase diagrams for different strain states can be mapped onto a single phase diagram with the Hall number. This universal plot is attributed to the critical fluctuations in multiband systems near the antiferromagnetic transition, which may suggest a direct link between magnetic and superconducting properties in the BaFe$_2$As$_2$ system.
description: Accepted for publication in Scientific Reports, 6 main figures plus Supplemental Information (8 figures)
Discrete Symmetries in Heterotic/F-theory Duality and Mirror Symmetry
Creators: name: Cvetic, Mirjam
name: Grassi, Antonella
name: Poretschkin, Maximilian
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study aspects of Heterotic/F-theory duality for compactifications with Abelian discrete gauge symmetries. We consider F-theory compactifications on genus-one fibered Calabi-Yau manifolds with n-sections, associated with the Tate-Shafarevich group Z_n. Such models are obtained by studying first a specific toric set-up whose associated Heterotic vector bundle has structure group Z_n. By employing a conjectured Heterotic/F-theory mirror symmetry we construct dual geometries of these original toric models, where in the stable degeneration limit we obtain a discrete gauge symmetry of order two and three, for compactifications to six dimensions. We provide explicit constructions of mirror-pairs for symmetric examples with Z_2 and Z_3, in six dimensions. The Heterotic models with symmetric discrete symmetries are related in field theory to a Higgsing of Heterotic models with two symmetric abelian U(1) gauge factors, where due to the Stuckelberg mechanism only a diagonal U(1) factor remains massless, and thus after Higgsing only a diagonal discrete symmetry of order n is present in the Heterotic models and detected via Heterotic/F-theory duality. These constructions also provide further evidence for the conjectured mirror symmetry in Heterotic/F-theory at the level of fibrations with torsional sections and those with multi-sections.
description: 25 pages, 4 figures
A realistic quantum capacitance model for quantum Hall edge state based Fabry-Pérot interferometers
Creators: name: Kilicoglu, O.
name: Eksi, D.
name: Siddiki, A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In this work, the classical and the quantum capacitances are calculated for a Fabry-Pérot interferometer operating in the integer quantized Hall regime. We first consider a rotationally symmetric electrostatic confinement potential and obtain the widths and the spatial distribution of the insulating (incompressible) circular strips using a charge density profile stemming from self-consistent calculations. Modelling the electrical circuit of capacitors composed of metallic gates and incompressible/compressible strips, we investigate the conditions to observe Aharonov-Bohm (quantum mechanical phase dependent) and Coulomb Blockade (capacitive coupling dependent) effects reflected in conductance oscillations. In a last step, we solve the Schrödinger and the Poisson equations self-consistently in a numerical manner taking into account realistic experimental geometries. We find that, describing the conductance oscillations either by Aharanov-Bohm or Coulomb Blockade strongly depends on sample properties also other than size, therefore, determining the origin of these oscillations requires further experimental and theoretical investigation.
Collision tomography: Physical properties of possible progenitors of the Andromeda stellar stream
Creators: name: Miki, Yohei
name: Mori, Masao
name: Rich, R. Michael
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: To unveil a progenitor of the Andromeda Giant Stellar Stream, we investigate the interaction between an accreting satellite galaxy and the Andromeda Galaxy using an $N$-body simulation. A comprehensive parameter study with 247 models is performed by varying size and mass distribution of the progenitor dwarf galaxy. We show that the binding energy of the progenitor is the crucial parameter in reproducing the Andromeda Giant Stellar Stream and the shell-like structures surrounding the Andromeda Galaxy. As a result of the simulations, the progenitor must satisfy a simple scaling relation between the core radius, the total mass and the tidal radius. Using this relation, we successfully constrain the physical properties of the progenitors to have mass ranging from $5\times10^8 M_\odot$ to $5\times10^9 M_\odot$ and central surface density around $10^3\, M_\odot\, \mathrm{pc}^{-2}$. A detailed comparison between our result and the nearby observed galaxies indicates that possible progenitors of the Andromeda Giant Stellar Stream include a dwarf elliptical galaxy, a dwarf irregular galaxy, and a small spiral galaxy.
description: 11 pages, 10 figures, accepted for publication in ApJ
Holographic equipartition from first order action
Creators: name: Wang, Jingbo
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper, we get the holographic equipartition form the first order formulism, that is, the connection and its conjugate momentum are considered to be the canonical variables. The final results have similar structure as those from the metric formulism.
description: 5 pages, no figures
An independent determination of the distance to supernova SN 1987A by means of the light echo AT 2019xis
Creators: name: Cikota, Aleksandar
name: Ding, Jiachen
name: Wang, Lifan
name: Baade, Dietrich
name: Cikota, Stefan
name: Höflich, Peter
name: Maund, Justyn
name: Yang, Ping
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Accurate distance determination to astrophysical objects is essential for the understanding of their intrinsic brightness and size. The distance to SN 1987A has been previously measured by the expanding photosphere method, and by using the angular size of the circumstellar rings with absolute sizes derived from light curves of narrow UV emission lines, with reported distances ranging from 46.77 kpc to 55 kpc. In this study, we independently determined the distance to SN 1987A using photometry and imaging polarimetry observations of AT 2019xis, a light echo of SN 1987A, by adopting a radiative transfer model of the light echo developed in Ding et al. (2021). We obtained distances to SN 1987A in the range from 49.09 $\pm$ 2.16 kpc to 59.39 $\pm$ 3.27 kpc, depending on the interstellar polarization and extinction corrections, which are consistent with the literature values. This study demonstrates the potential of using light echoes as a tool for distance determination to astrophysical objects in the Milky Way, up to kiloparsec level scales.
description: Accepted for publication in ApJL
Space weather research and forecast in USA
Creators: name: Pevtsov, Alexei A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Space Physics (physics.space-ph)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In the United States, scientific research in space weather is funded by several Government Agencies including the National Science Foundation (NSF) and the National Aeronautics and Space Agency (NASA). For commercial purposes, space weather forecast is made by the Space Weather Prediction Center (SWPC) of the National Oceanic and Atmospheric Administration (NOAA). Observations come from the network of groundbased observatories funded via various sources, as well as from the instruments on spacecraft. Numerical models used in forecast are developed in the framework of individual research projects. Later, the most promising models are selected for additional testing at SWPC. In order to increase the application of models in research and education, NASA in collaboration with other agencies created Community Coordinated Modeling Center (CCMC). In mid-1990, US scientific community presented compelling evidence for developing the National Program on Space Weather, and in 1995, such program has been formally created. In 2015, the National Council on Science and Technology issued two documents: the National Space Weather Strategy [1] and the Action Plan [2]. In the near future, these two documents will define the development of Space Weather research and forecasting activity in USA. Both documents emphasize the need for close international collaboration in area of space weather.
description: 6 pages, 2 figures, submitted for publication in Proceedings of XX annual Conference on Solar and Solar-Terrestrial Physics held at the Central (Pulkovo) Astronomical Observatory, 10-14 Oct. 2016
Room-temperature superfluidity in a polariton condensate
Creators: name: Lerario, Giovanni
name: Fieramosca, Antonio
name: Barachati, Fábio
name: Ballarini, Dario
name: Daskalakis, Konstantinos S.
name: Dominici, Lorenzo
name: De Giorgi, Milena
name: Maier, Stefan A.
name: Gigli, Giuseppe
name: Kéna-Cohen, Stéphane
name: Sanvitto, Daniele
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Superfluidity---the suppression of scattering in a quantum fluid at velocities below a critical value---is one of the most striking manifestations of the collective behaviour typical of Bose-Einstein condensates. This phenomenon, akin to superconductivity in metals, has until now only been observed at prohibitively low cryogenic temperatures. For atoms, this limit is imposed by the small thermal de Broglie wavelength, which is inversely related to the particle mass. Even in the case of ultralight quasiparticles such as exciton-polaritons, superfluidity has only been demonstrated at liquid helium temperatures. In this case, the limit is not imposed by the mass, but instead by the small exciton binding energy of Wannier-Mott excitons, which places the upper temperature limit. Here we demonstrate a transition from normal to superfluid flow in an organic microcavity supporting stable Frenkel exciton-polaritons at room temperature. This result paves the way not only to table-top studies of quantum hydrodynamics, but also to room-temperature polariton devices that can be robustly protected from scattering.
description: 14 pages, 5 figures, supporting information 7 pages, 9 figures
Influence of the Lower Atmosphere on Wave Heating and Evaporation in Solar Coronal Loops
Creators: name: Guo, Mingzhe
name: Duckenfield, Timothy
name: Van Doorsselaere, Tom
name: Karampelas, Konstantinos
name: Pelouze, Gabriel
name: gao, Yuhang
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We model a coronal loop as a three-dimensional magnetic cylinder in a realistic solar atmosphere that extends from the chromosphere to the corona. Kink oscillations, believed ubiquitous in the solar corona, are launched in the loop. Heating is expected due to the dissipation of wave energy at small structures that develop from the Kelvin-Helmholtz instability induced by kink oscillations. Increases in temperature and internal energy can be observed in the coronal counterpart of the driven loop. With the presence of thermal conduction, chromospheric evaporation can also be seen. Although the volume averaged temperature and density changes seem slight ($\sim4\%$ relative to a non-driven loop), the enthalpy flow from the lower atmosphere redistributes the density and temperature in the vertical direction, thus enhancing the dissipation of wave energy in the corona. The efficient heating in the coronal counterpart of the loop can complement the thermal conductive losses shown in the current model and thus maintain the internal energy in the corona.
description: Accepted for publication in ApJL
Auf dem Weg in eine „normbegabte“ Zukunft? Jesaja 35 und das medizinische Modell von Behinderung
Creators: name: Döbler, Sarah
Publisher: name: University of Vienna
Year: 2023
Subjects: Alttestamentliche Bibelwissenschaft
Old Testament studies
ÖFOS 2012 -- GEISTESWISSENSCHAFTEN (6) -- Philosophie, Ethik, Religion (603) -- Theologie (6032) -- Alttestamentliche Bibelwissenschaft (603201)
ÖFOS 2012 -- HUMANITIES (6) -- Philosophy, Ethics, Religion (603) -- Theology (6032) -- Old Testament studies (603201)
Disability Studies
Isaiah 35
Medical Model
Prophetic Utopia
Prospects of Recovery

description: In its vision of the future, Isaiah 35 opens up the prospect of a safe return of the exiled people to Zion. For this, Isaiah 35 uses striking imagery, in which people with physical disabilities are made the visual object of divine encouragement and action, analogous to the surrounding nature. Not only areas which are believed to be dead are transformed into a fertile paradise, but also physically disabled people experience healing through YHWH, the god of Israel. However, the fact that this vision of healing also contains negative ethi-cal implications for people with disabilities is worked out in this essay with reference to the Disability Studies and their various disability models.
Asymptotic expansions for field moments of bound states
Creators: name: Forbes, G. W.
name: Alonso, Miguel A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Asymptotic expansions are presented for the moments of bound states in one-dimensional anharmonic potentials. The results are derived by using the SAFE method and include only the first non-zero wave-related correction to the familiar semi-classical approximation. Application to a couple of widely studied potentials that do not permit closed-form solutions is used to demonstrate surprising accuracy even in cases that are far from any asymptotic limit. We explore the absence of alternate terms in the asymptotic expansions as a way to explain the accuracy of the end results. Those results are expressed in terms of definite integrals with integrands involving the parameter used in the SAFE method to control the extent of the associated elemental field contributions. Importantly, the integrals themselves are shown to be precisely independent of that parameter. Further, although the derivation proceeds by way of an asymptotic expansion for the wavefield that involves the associated classical motion, those entities do not appear in the end results which are expressed in terms of just the potential function and its first four derivatives.
NMR Observation of Ferro-quadrupole Order in PrTi2Al20
Creators: name: Taniguchi, Takanori
name: Yoshida, Makoto
name: Takeda, Hikaru
name: Takigawa, Masashi
name: Tsujimoto, Masaki
name: Sakai, Akito
name: Matsumoto, Yosuke
name: Nakatsuji, Satoru
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report the results of 27Al-NMR measurements on a single crystal of PrTi2Al20. This compound shows a phase transition near 2 K associated with the quadrupole degree of freedom of Pr ions, for which the ground state of the crystalline electric field is a nonmagnetic doublet. When a magnetic field is applied along the <111> direction, the NMR lines split upon entering the low-temperature phase, indicating the breaking of the three fold rotation symmetry due to the field-induced magnetic dipole perpendicular to the field. This provides microscopic evidence for a ferro order of the O20 quadrupole. Although a first-order transition is expected theoretically, the line splitting evolves continuously within the experimental resolution.
description: accepted for publication as a volume of J. Phy. Soc. Jpn
Beam Dynamics and Beam Losses - Circular Machines
Creators: name: Kain, V.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: A basic introduction to transverse and longitudinal beam dynamics as well as the most relevant beam loss mechanisms in circular machines will be presented in this lecture. This lecture is intended for physicists and engineers with little or no knowledge of this subject.
description: 18 pages, contribution to the 2014 Joint International Accelerator School: Beam Loss and Accelerator Protection, Newport Beach, CA, USA , 5-14 Nov 2014
Discovery of a substellar companion in the TESS light curve of the $δ$ Scuti/$γ$ Doradus hybrid pulsator HD 31221
Creators: name: Kálmán, Sz.
name: Derekas, A.
name: Csizmadia, Sz.
name: Szabó, Gy. M.
name: Hegedűs, V.
name: Smith, A. M. S.
name: Kovács, J.
name: Ziegler, C.
name: Pál, A.
name: Szabó, R.
name: Parviainen, H.
name: Murgas, F.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Close-in, sub-stellar companions to $δ$ Scuti type stars present a highly suitable testbed for examining how planetary-mass objects can influence stellar pulsations. We aim to constrain the mass of HD 31221 b, probe its atmosphere, and demonstrate how it affects the pulsational pattern of its host, HD 31221. We made use of the available data from the short-cadence Transiting Exoplanet Survey Satellite (TESS). We modeled the nine observed transits and the out-of-phase variations, including Doppler beaming, ellipsoidal variations, and the reflection effect. We also incorporated ground-based photometry from the MuSCAT2 imager installed at the 1.52 m Telescopio Carlos Sanchez in the Teide Observatory, Spain. We found HD 31221 b to have an orbital period of $4.66631 \pm 0.00011$ days, with a radius of $1.32 \pm 0.14$ R$_J$ and a mass of $11.5 \pm 10.3$ M$_J$ (from the ellipsoidal effect), making it consistent with either a brown dwarf or a giant planet. As HD 31221 is a rapid rotator ($v \sin I_\star = 175.31 \pm 1.74$ km s$^{-1}$), we deduced the spin-orbit misalignment to be $λ= -121.6 \pm 14.4^\circ$ and $I_\star = 55.9 \pm 11.3^\circ$. The phase curve is dominated by the reflection effect, with a geometric albedo of $1.58 \pm 0.50$. We also found evidence that HD 31221 is a $δ$ Scuti/$γ$ Doradus hybrid pulsator. There are three cases for which the $3$rd, $85$th, and $221$st orbital harmonics almost exactly coincide with peaks in the Fourier spectrum of the star, hinting at tidally perturbed stellar oscillations. HD 31221 b is the third substellar object that is found to be disrupting the pulsations of its host, following HAT-P-2 and WASP-33. Additional photometric observations by CHEOPS and/or PLATO can be used to further constrain its mass and provide a more in-depth analysis of its atmosphere.
description: Accepted for publication as a Letter in A&A, 12 pages, 10 figures
Supplementary document for Ultra-broadband and high-efficiency Planar Chiral Metamaterial - 6099761.pdf
Creators: name: Hussain, Shahid
name: Liu, Qingquan
name: Maroof, Zubaria
name: Ji, Ruonan
name: Wang, Shao-Wei
Publisher: name: Optica Publishing Group
Year: 2022
Subjects: Uncategorized

description: Supplement 1