cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The evolution of circumstellar discs in the Galactic Centre: an application to the G-clouds
Creators: name: Owen, James E.
name: Lin, Douglas N. C.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The Galactic Centre is known to have undergone a recent star formation episode a few Myrs ago, which likely produced many T Tauri stars hosting circumstellar discs. It has been suggested that these discs may be the compact and dusty ionized sources identified as ``G-clouds''. Given the Galactic Centre's hostile environment, we study the possible evolutionary pathways these discs experience. We compute new external photoevaporation models applicable to discs in the Galactic Centre that account for the sub-sonic launching of the wind and absorption of UV photons by dust. Using evolutionary disc calculations, we find that photoevaporation's rapid truncation of the disc causes them to accrete onto the central star rapidly. Ultimately, an accreting circumstellar disc has a lifetime $\lesssim1~$Myr, which would fail to live long enough to explain the G-clouds. However, we identify a new evolutionary pathway for circumstellar discs in the Galactic Centre. Removal of disc material by photoevaporation prevents the young star from spinning down due to magnetic braking, ultimately causing the rapidly spinning young star to torque the disc into a ``decretion disc'' state which prevents accretion. At the same time, any planetary companion in the disc will trap dust outside its orbit, shutting down photoevaporation. The disc can survive for up to $\sim$10 Myr in this state. Encounters with other stars are likely to remove the planet on Myr timescales, causing photoevaporation to restart, giving rise to a G-cloud signature. A giant planet fraction of $\sim10\%$ can explain the number of observed G-clouds.
description: Accepted for publication in MNRAS
SEMI-LIQUID LUBRICATING OIL COMPOSITION MADE BASED ON LOCAL PROCESSES INFRARED SPECTROSCOPY  ANALYSIS METHOD RESULTS
Creators: name: Djiyanbayev Sirojiddin Valiyevich
name: Shavqiyev Elbek Abdurazzoq o'g'li
Publisher: name: Zenodo
Year: 2024

description: Abstract.  The results of the infrared spectroscopy analysis method of the semi-liquid lubricating oil composition prepared using local raw materials are comprehensively approached in this article, which was prepared based on the results of the research. In addition, the IR-spectrum analysis and graph of tar, paraffinized oil SD-7, salomas, which are included in the composition of surkov oil, are widely covered.
Verso la Public History. Rappresentazioni e commemorazioni delle guerre mondiali in Belgio
Creators: name: Kesteloot, Chantal
Publisher: name: C. Kesteloo, Verso la Public History. Rappresentazioni e commemorazioni delle guerre mondiali in Belgio, «Memoria e Ricerca», 54, 2017, pp. 41-59
Year: 2017

description: War Centenary 2014 featured an unprecedented number of activities linked to the centenary of WWI. How can the memory and the legacy of that period be passed on when all witnesses are dead and when commemorative monuments seem to have lost their memorial value? Since the mid-1990, temporary exhibitions appeared as a privileged way to represent the Belgian experience regarding the two World Wars. The different stakeholders seem to agree more and more on the fact that museums and exhibitions are essential tools for handing down the commemorative message. In this sense, important sums have been allocated for different projects. In the context of the Centenary, Flanders opted for funding long-term museum projects, whereas the francophone part of Belgium decided to give priority to large-scale temporary exhibitions. Beside these far-reaching projects, innumerable small exhibitions and installations were organized. Is this the new way to face the past? What kind of narratives are presented?
Kageralna Boulard 2012, n. gen.
Creators: name: Boulard, Michel
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Cicadidae
Kageralna

description: Kageralna n. gen. Espèce­type: Kageralna dargei n. sp. Diagnose. – Corps fusiforme, tête triangulaire proéminente, aussi large que le pronotum, ocelles latéro­postérieurs portés très en arrière sur le vertex et par suite très proches du rebord pronotal antérieur; mésosternum turgescent; ailes antérieures avec un fort ptérostigma arquant la costa au point nodal, cellule radiale plus longue, nettement, que la postcostale, cellules ulnaires 1 et 2 très étroites, aire apicale très large, octoloculée; ailes postérieures à cinq cellules terminales. Chez les mâles, cymbales exposées (absence totale de cymbacalyptes). Allié au genre sud­africain Callipsaltria Stål, 1861, dont, dès l'abord, le nouveau genre diffère par la costa homélytrale très arquée au niveau d'un ptérostigma singulièrement développé. Les deux genres africains participent à la tribu des Parnisini Distant, 1905, tribu hétéroclite devant être révisée.
description: Published as part of Boulard, Michel, 2012, Nouvelles Cigales originaires de Tanzanie (Rhynchota, Auchenorhyncha, Cicadidae), pp. 41-52 in Bulletin de la Société entomologique de France 117 (1) on page 51, DOI: 10.3406/bsef.2012.2640, http://zenodo.org/record/3565823
description: {"references": ["1905. - Rhynchotal notes. XXXII. Annals and Magazine of Natural History, (7) 15: 478 - 486."]}
Density Estimation in the Uniform Norm and White Noise Approximation
Creators: name: Korostelev, Alexander P.
name: Nussbaum, Michael
Publisher: name: Weierstrass Institute
Year: 1995
Subjects: subject: Density estimation
subject: uniform norm loss
subject: asymptotic minimax risk
subject: exact constant
subject: nonparametric experiments
subject: Gaussian white noise
subject: deficiency distance
subject: asymptotic equivalence
subject: 62G07
subject: 62B15
subject: 62G20

description: We develop the exact constant of the risk asymptotics in the uniform norm for density estimation. This constant has first been found for nonparametric regression and for signal estimation in Gaussian white noise. We show that for densities with Hölder exponent > 1/2, the formal approximation of the i. i. d. experiment by Gaussian white noise in the sense of Le Cam's deficiency distance (asymptotic equivalence) can be utilized. For densities with Hölder exponent ≤ 1/2 where asymptotic equivalence fails, the result can still be established independently.
DS+: a method for the identification of cluster substructures
Creators: name: Benavides, Jose A.
name: Biviano, Andrea
name: Abadi, Mario G.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The study of cluster substructures is important for the determination of the cluster dynamical status, assembly history, and the evolution of cluster galaxies, and it allows to set of constraints on the nature of dark matter and cosmological parameters. We present and test DS+, a new method for the identification and characterization of group-sized substructures in clusters. Our new method is based on the projected positions and line-of-sight velocities of cluster galaxies, and it is an improvement and extension of the traditional method of Dressler & Shectman (1988). We test it on cluster-size cosmological halos extracted from the IllustrisTNG simulations, with virial masses $\rm{14 \lesssim \log (M_{200}/M_{\odot}) \lesssim 14.6}$, that contain on average $\sim 190$ galaxies. We also present an application of our method on a real data set, the Bullet cluster. DS+ is able to identify $\sim 80\%$ of real group galaxies as members of substructures, and at least 60\% of the galaxies assigned to substructures belong to real groups. The physical properties of the real groups are significantly correlated with those of the corresponding detected substructures, albeit with significant scatter, and overestimated on average. Application of the DS+ method to the Bullet cluster confirms the presence and main properties of the high-speed collision and identifies other substructures along the main cluster axis. DS+ proves to be a reliable method for the identification of substructures in clusters. The method is made freely available to the community as a Python code.
description: 13 pages, 8 figures, accepted for publication in A&A
title: Construction of a time-averaged crossed optical dipole trap for ultracold 6Li atoms
Creators: name: Sun, Yudong
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2022

description: The use of ultracold neutral atoms for quantum computing and quantum simulation offers many advantages in terms of scalability. The Fermion Quantum Processor (FermiQP) experiment aims to use ultracold fermionic 6Li atoms to construct a novel combined digital- and analogue quantum processor. In this thesis, a crossed-beam optical dipole trap (ODT), implemented using a 200 W, red detuned (1070 nm) laser, is proposed for use in the experiment. Trap geometries larger than the size of the focused beam are to be achieved through spatial modulation in the MHz regime using an acousto-optic modulator (AOM). The feasibility of the proposal was tested with a proof-of-concept setup built with a lower-power 1064 nm laser. A time-averaged potential with a vertical cross-sectional area approximately three times that of the static beam was attained by modulating the beam position at 3.4 MHz. By dynamically changing the shape of the time-averaged potential, the proposed ODT promises more efficient loading and faster evaporative cooling that would reduce the cycle time of the experiment as compared to a static crossed ODT.
description: Ultrakalte neutrale Atome als Plattform für Quantum Computing und Quantensimulationen stechen aufgrund ihrer Skalierbarkeit hervor. Das Fermion-Quantenprozessor-Experiment (FermiQP) hat sich zum Ziel gesetzt, einen auf ultrakalten neutralen 6Li-Atomen basierenden experimentellen Aufbau zu realisieren, der die Funktionen eines digitalen und eines analogen Quantencomputers vereinigt. In dieser Arbeit wird eine optische Dipolfalle, die mittels eines rot-verstimmten 200 W-Lasers (1070 nm) implementiert werden soll, vorgestellt. Fallengeometrien größer als der Strahldurchmesser im Fokus sollen durch räumliche Modulation im MHz-Regime mittels eines akusto-optischen Modulators ermöglicht werden. Die Durchführbarkeit des Vorhabens wurde mit einem Aufbau, der mit einem 1064 nm-Laser mit niedrigerer Leistung betrieben wurde, getestet. Mittels Modulation der Strahlposition mit 3,4 MHz wurde ein zeitlich gemitteltes Potential mit einer vertikalen Querschnittsfläche erreicht, die ungefähr drei mal so groß wie die ohne Modulation erreichbare Querschnittsfläche ist. Durch dynamische Variation der Form des zeitlich gemittelten Potentials werden ein effizienteres Beladen und ein schnelleres Verdampfungskühlen als mit einer statischen Dipolfalle möglich, wodurch die Zeit eines Experimentdurchlaufs reduziert werden kann.
Swift Ultraviolet Observations of Supernova 2014J in M82: Large Extinction from Interstellar Dust
Creators: name: Brown, Peter J.
name: Smitka, Michael T.
name: Wang, Lifan
name: Breeveld, Alice
name: de Pasquale, Massimiliano
name: Hartmann, Dieter H.
name: Krisciunas, Kevin
name: Kuin, N. P. M.
name: Milne, Peter A.
name: Page, Mat
name: Siegel, Michael
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present optical and ultraviolet (UV) photometry and spectra of the very nearby and highly reddened supernova (SN) 2014J in M82 obtained with the Swift Ultra-Violet/Optical Telescope (UVOT). Comparison of the UVOT grism spectra of SN~2014J with Hubble Space Telescope observations of SN2011fe or UVOT grism spectra of SN~2012fr are consistent with an extinction law with a low value of R_V~1.4. The high reddening causes the detected photon distribution in the broadband UV filters to have a much longer effective wavelength than for an unreddened SN. The light curve evolution is consistent with this shift and does not show a flattening due to photons being scattered back into the line of sight. The light curve shapes and color evolution are inconsistent with a contribution scattered into the line of sight by circumstellar dust. We conclude that most or all of the high reddening must come from interstellar dust. We show that even for a single dust composition, there is not a unique reddening law caused by circumstellar scattering. Rather, when considering scattering from a time-variable source, we confirm earlier studies that the reddening law is a function of the dust geometry, column density, and epoch. We also show how an assumed geometry of dust as a foreground sheet in mixed stellar/dust systems will lead to a higher inferred R_V. Rather than assuming the dust around SNe is peculiar, SNe may be useful probes of the interstellar reddening laws in other galaxies.
description: 14 pages including 8 figures
On the estimation of a support curve of indeterminate sharpness
Creators: name: Hall, Peter
name: Nussbaum, Michael
name: Stern, Steven E.
Publisher: name: Weierstrass Institute
Year: 1995
Subjects: subject: Convergence rate
subject: curve estimation
subject: endpoint
subject: order statistic
subject: regular variation
subject: support
subject: 62G07
subject: 62H05
subject: 62H10

description: We propose nonparametric methods for estimating the support curve of a bivariate density, when the density decreases at a rate which might vary along the curve. Attention is focussed on cases where the rate of decrease is relatively fast this, being the most difficult setting. It demands the use of a relatively large number of bivariate order statistics. By way of comparison, support curve estimation in the context of slow rates of decrease of the density may be addressed using methods that use only a relatively small number of order statistics at the extremities of the point cloud. In this paper we suggest a new type of estimator, based on projecting onto an axis those data values lying within a thin rectangular strip. Adaptive univariate methods are then applied to the problem of estimating an endpoint of the distribution on the axis. The new method is shown to have theoretically optimal performance in a range of settings. Its numerical properties are explored in a simulation study.
Convex Geometry of ReLU-layers, Injectivity on the Ball and Local Reconstruction
Creators: name: Haider, Daniel
name: Ehler, Martin
name: Balazs, Peter
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: The paper uses a frame-theoretic setting to study the injectivity of a ReLU-layer on the closed ball of $\mathbb{R}^n$ and its non-negative part. In particular, the interplay between the radius of the ball and the bias vector is emphasized. Together with a perspective from convex geometry, this leads to a computationally feasible method of verifying the injectivity of a ReLU-layer under reasonable restrictions in terms of an upper bound of the bias vector. Explicit reconstruction formulas are provided, inspired by the duality concept from frame theory. All this gives rise to the possibility of quantifying the invertibility of a ReLU-layer and a concrete reconstruction algorithm for any input vector on the ball.
description: 10 pages main paper + 2 pages appendix, 4 figures, 2 algorithms, conference
Surfaces in Sol$_3$ space foliated by circles
Creators: name: López, Rafael
name: Nistor, Ana
Publisher: name: arXiv
Year: 2014
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: In this paper we study surfaces foliated by a uniparametric family of circles in the homogeneous space Sol$_3$. We prove that there do not exist such surfaces with zero mean curvature or with zero Gaussian curvature. We extend this study considering surfaces foliated by geodesics, equidistant lines or horocycles in totally geodesic planes and we classify all such surfaces under the assumption of minimality or flatness.
A Framework for Obtaining Accurate Posteriors of Strong Gravitational Lensing Parameters with Flexible Priors and Implicit Likelihoods using Density Estimation
Creators: name: Legin, Ronan
name: Hezaveh, Yashar
name: Perreault-Levasseur, Laurence
name: Wandelt, Benjamin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We report the application of implicit likelihood inference to the prediction of the macro-parameters of strong lensing systems with neural networks. This allows us to perform deep learning analysis of lensing systems within a well-defined Bayesian statistical framework to explicitly impose desired priors on lensing variables, to obtain accurate posteriors, and to guarantee convergence to the optimal posterior in the limit of perfect performance. We train neural networks to perform a regression task to produce point estimates of lensing parameters. We then interpret these estimates as compressed statistics in our inference setup and model their likelihood function using mixture density networks. We compare our results with those of approximate Bayesian neural networks, discuss their significance, and point to future directions. Based on a test set of 100,000 strong lensing simulations, our amortized model produces accurate posteriors for any arbitrary confidence interval, with a maximum percentage deviation of $1.4\%$ at $21.8\%$ confidence level, without the need for any added calibration procedure. In total, inferring 100,000 different posteriors takes a day on a single GPU, showing that the method scales well to the thousands of lenses expected to be discovered by upcoming sky surveys.
description: Accepted for publication in The Astrophysical Journal, 17 pages, 11 figures
Dynamics of slender monopoles and anti-monopoles in non-Abelian superconductor
Creators: name: Arai, Masato
name: Blaschke, Filip
name: Eto, Minoru
name: Sakai, Norisuke
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Low energy dynamics of magnetic monopoles and anti-monopoles in the U(2) gauge theory is studied in the Higgs (non-Abelian superconducting) phase. The monopoles in this superconducting phase are not spherical but are of slender ellipsoid which are pierced by a vortex string. We investigate scattering of the slender monopole and anti-monopole, and find that they do not always decay into radiation, contrary to our naive intuition. They can repel, make bound states (magnetic mesons) or resonances. Analytical solutions including any number of monopoles and anti-monopoles are obtained in the first non-trivial order of rigid-body approximation. We point out that some part of solutions of slender monopole system in 1+3 dimensions can be mapped exactly onto the sine-Gordon system in 1+1 dimensions. This observation allows us to visualize dynamics of monopole and anti-monopole scattering easily.
description: 44 pages, 11 figures
A generalized collision mechanism for stochastic particle schemes approximating Boltzmann type equations
Creators: name: Rjasanow, Sergej
name: Wagner, Wolfgang
Publisher: name: Weierstrass Institute
Year: 1995
Subjects: subject: Boltzmann type equations
subject: stochastic particle method
subject: collision mechanism
subject: random weight transfer
subject: variance reduction
subject: 65C05
subject: 76P05
subject: 82C80

description: A generalized collision mechanism for Boltzmann type stochastic particle schemes is developed. This mechanism is based on the idea of random weight transfer originating from random discrete velocity models. The problem of applying the new degrees of freedom for the purpose of variance reduction is studied. Some results of numerical experiments are given.
Supplementary document for Design, Optimization and Characterization of Deep Sub-Wavelength Evanescent Orders in Terahertz Metagratings - 6492554.pdf
Creators: name: Rane, Shreeya
name: Punjal, Ajinkya
name: Prabhu, Shriganesh
name: Chowdhury, Dibakar Roy
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: Uncategorized

description: Supplemental materials
title: In Memoriam Ernst Göhner 1900-1971
title: Gedenkfeier im Neumünster in Zürich, Montag, den 29. November 1971
titleType: Subtitle
Creators: name: Frick, Max
name: Meier, Oscar
name: Widmer, Sigmund
name: Lange, Rudolf
Publisher: name: [Gedenkschriften-Verlag]
Year: 1971
Subjects: subject: 920 Biografien, Genealogie, Insignien
subject: Nachruf
subject: Göhner, Ernst
subject: Zürich
subject: Neumünster (Zürich)

description: Enthält Ansprachen von: Pfarrer Max Frick ; von Direktor Oscar Meier, Vizepräsident der Ernst Göhner AG ; von Stadtpräsident Dr. Sigmund Widmer ; von Rudolf Lange im Namen der Zunft Riesbach ;
Lanzetta, Serafino M.: II Vaticano II, Un Concilio Pastorale
Creators: name: Gaál Gyulai, Emery De
Publisher: name: Forum Katholische Theologie
Year: 1970

description: Forum Katholische Theologie, Bd. 31 Nr. 4 (2015): Forum Katholische Theologie, Band 31, Heft 4
Hans Urs von Balthasar-Stiftung (Hg.): Eine Theologie für das 21. Jahrhundert. Zur Wirkungsgeschichte Hans Urs von Balthasars
Creators: name: Lochbrunner, Manfred
Publisher: name: Forum Katholische Theologie
Year: 1970

description: Forum Katholische Theologie, Bd. 31 Nr. 4 (2015): Forum Katholische Theologie, Band 31, Heft 4
Report from the Stakeholder Validation Workshop
Creators: name: Pastor, María Soledad
Publisher: name: Zenodo
Year: 2022

description: On June 22nd, 2022, the DocEnhance consortium held the Stakeholder Validation Workshop (SVW) at the University of Manchester (Manchester, UK), in the frame of the project’s second annual meeting and the EUA-CDE Annual Meeting, with the double objective of: presenting the second prototype of the DocEnhance Platform and its revised contents (the three transferable skills courses designed and piloted by different consortium members on Supervision, Data Management, and Career Management and Entrepreneurship) to interested stakeholders, and collecting vital external feedback and suggestions regarding its usefulness, usability and possible areas of improvement.
Singularly perturbed systems: Case of exchange of stability
Creators: name: Nefedov, Nikolai
name: Schneider, Klaus R.
Publisher: name: Weierstrass Institute
Year: 1995
Subjects: subject: Singular perturbation
subject: asymptotic methods
subject: exchange of stability
subject: upper and lower solutions
subject: 34D15
subject: 34E05

description: We consider systems of singularly perturbed ordinary differential equations and study the initial value problem on a finite interval. Our goal is to describe the asymptotic behavior of its solution with respect to ε in case of exchange of stability of a solution of the degenerate system considered as a steady state solution of the associated system. The obtained results extend the well-known fundamental theorems due to A.N. Tikhonov and A.B. Vasil'eva.
Fast Quantum Methods for Optimization
Creators: name: Boixo, Sergio
name: Ortiz, Gerardo
name: Somma, Rolando
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Discrete combinatorial optimization consists in finding the optimal configuration that minimizes a given discrete objective function. An interpretation of such a function as the energy of a classical system allows us to reduce the optimization problem into the preparation of a low-temperature thermal state of the system. Motivated by the quantum annealing method, we present three strategies to prepare the low-temperature state that exploit quantum mechanics in remarkable ways. We focus on implementations without uncontrolled errors induced by the environment. This allows us to rigorously prove a quantum advantage. The first strategy uses a classical-to-quantum mapping, where the equilibrium properties of a classical system in $d$ spatial dimensions can be determined from the ground state properties of a quantum system also in $d$ spatial dimensions. We show how such a ground state can be prepared by means of quantum annealing, including quantum adiabatic evolutions. This mapping also allows us to unveil some fundamental relations between simulated and quantum annealing. The second strategy builds upon the first one and introduces a technique called spectral gap amplification to reduce the time required to prepare the same quantum state adiabatically. If implemented on a quantum device that exploits quantum coherence, this strategy leads to a quadratic improvement in complexity over the well-known bound of the classical simulated annealing method. The third strategy is not purely adiabatic; instead, it exploits diabatic processes between the low-energy states of the corresponding quantum system. For some problems it results in an exponential speedup (in the oracle model) over the best classical algorithms.
description: 15 pages (2 figures)
Solving multiphysics-based inverse problems with learned surrogates and constraints
Creators: name: Yin, Ziyi
name: Orozco, Rafael
name: Louboutin, Mathias
name: Herrmann, Felix J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Geophysics (physics.geo-ph)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: Numerical Analysis (math.NA)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Solving multiphysics-based inverse problems for geological carbon storage monitoring can be challenging when multimodal time-lapse data are expensive to collect and costly to simulate numerically. We overcome these challenges by combining computationally cheap learned surrogates with learned constraints. Not only does this combination lead to vastly improved inversions for the important fluid-flow property, permeability, it also provides a natural platform for inverting multimodal data including well measurements and active-source time-lapse seismic data. By adding a learned constraint, we arrive at a computationally feasible inversion approach that remains accurate. This is accomplished by including a trained deep neural network, known as a normalizing flow, which forces the model iterates to remain in-distribution, thereby safeguarding the accuracy of trained Fourier neural operators that act as surrogates for the computationally expensive multiphase flow simulations involving partial differential equation solves. By means of carefully selected experiments, centered around the problem of geological carbon storage, we demonstrate the efficacy of the proposed constrained optimization method on two different data modalities, namely time-lapse well and time-lapse seismic data. While permeability inversions from both these two modalities have their pluses and minuses, their joint inversion benefits from either, yielding valuable superior permeability inversions and CO2 plume predictions near, and far away, from the monitoring wells.
Alleviating the Long-Tail Problem in Conversational Recommender Systems
Creators: name: Zhao, Zhipeng
name: Zhou, Kun
name: Wang, Xiaolei
name: Zhao, Wayne Xin
name: Pan, Fan
name: Cao, Zhao
name: Wen, Ji-Rong
Publisher: name: arXiv
Year: 2023
Subjects: subject: Information Retrieval (cs.IR)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Conversational recommender systems (CRS) aim to provide the recommendation service via natural language conversations. To develop an effective CRS, high-quality CRS datasets are very crucial. However, existing CRS datasets suffer from the long-tail issue, \ie a large proportion of items are rarely (or even never) mentioned in the conversations, which are called long-tail items. As a result, the CRSs trained on these datasets tend to recommend frequent items, and the diversity of the recommended items would be largely reduced, making users easier to get bored. To address this issue, this paper presents \textbf{LOT-CRS}, a novel framework that focuses on simulating and utilizing a balanced CRS dataset (\ie covering all the items evenly) for improving \textbf{LO}ng-\textbf{T}ail recommendation performance of CRSs. In our approach, we design two pre-training tasks to enhance the understanding of simulated conversation for long-tail items, and adopt retrieval-augmented fine-tuning with label smoothness strategy to further improve the recommendation of long-tail items. Extensive experiments on two public CRS datasets have demonstrated the effectiveness and extensibility of our approach, especially on long-tail recommendation.
description: work in progress
Twist angle dependent electronic properties of exfoliated single layer MoS$_2$ on Au(111)
Creators: name: Pushkarna, Ishita
name: Pásztor, Árpád
name: Renner, Christoph
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Synthetic materials and heterostructures obtained by the controlled stacking of exfoliated monolayers are emerging as attractive functional materials owing to their highly tunable properties. We present a detailed scanning tunneling microscopy and spectroscopy study of single layer MoS$_2$-on-gold heterostructures as a function of twist angle. We find that their electronic properties are determined by the hybridization of the constituent layers and are modulated at the moiré period. The hybridization depends on the layer alignment and the modulation amplitude vanishes with increasing twist angle. We explain our observations in terms of a hybridization between the nearest sulfur and gold atoms, which becomes spatially more homogeneous and weaker as the moiré periodicity decreases with increasing twist angle, unveiling the possibility of tunable hybridization of electronic states via twist angle engineering.
Dual-Corona Comptonization model for the Type-B Quasi-Periodic Oscillations in GX 339-4
Creators: name: Peirano, Valentina
name: Méndez, Mariano
name: García, Federico
name: Belloni, Tomaso
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Characterising the fast variability in black-hole low-mass X-ray binaries (BHXBs) can help us understand the geometrical and physical nature of the innermost regions of these sources. Particularly, type-B quasi-periodic oscillations (QPOs), observed in BHXBs during the soft-intermediate state (SIMS) of an outburst, are believed to be connected to the ejection of a relativistic jet. The X-ray spectrum of a source in the SIMS is characterised by a dominant soft blackbody-like component - associated with the accretion disc - and a hard component - associated with a Comptonizing region or corona. Strong type-B QPOs were observed by NICER and AstroSat in GX 339$-$4 during its 2021 outburst. We find that the fractional rms spectrum of the QPO remains constant at $\sim$1 per cent for energies below $\sim$1.8 keV and then increases with increasing energy up to $\sim$17 per cent at 20$-$30 keV. We also find that the lag spectrum is "U-shaped", decreasing from $\sim$1.2 rad at 0.7 keV to 0 rad at $\sim$3.5 keV, and increasing again at higher energies up to $\sim$0.6 rad at 20$-$30 keV. Using a recently developed time-dependent Comptonization model, we fit simultaneously the fractional rms and lag spectra of the QPO and the time-averaged energy spectrum of GX 339$-$4 to constrain the physical parameters of the region responsible for the variability we observe. We suggest that the radiative properties of the type-B QPOs observed in GX 339$-$4 can be explained by two physically-connected Comptonizing regions that interact with the accretion disc via a feedback loop of X-ray photons.
description: 13 pages, 7 figures, accepted for publication in Monthly Notices of the Royal Astronomical Society
Supplementary document for Design, Optimization and Characterization of Deep Sub-Wavelength Evanescent Orders in Terahertz Metagratings - 6573953.pdf
Creators: name: Rane, Shreeya
name: Punjal, Ajinkya
name: Prabhu, Shriganesh
name: Chowdhury, Dibakar Roy
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: Uncategorized
Photonics, Optoelectronics and Optical Communications

description: Supplemental document
Unravelling tidal dissipation in gaseous giant planets
Creators: name: Guenel, Mathieu
name: Mathis, Stéphane
name: Remus, Françoise
Publisher: name: arXiv
Year: 2014
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Tidal dissipation in planetary interiors is one of the key physical mechanisms that drive the evolution of star-planet and planet-moon systems. New constraints are now obtained both in the Solar and exoplanetary systems. Tidal dissipation in planets is intrinsically related to their internal structure. In particular, fluid and solid layers behave differently under tidal forcing. Therefore, their respective dissipation reservoirs have to be compared. In this letter, we compute separately the contributions of the potential dense rocky/icy core and the convective fluid envelope of gaseous giant planets, as a function of core size and mass. We then compare the associated dissipation reservoirs, by evaluating the frequency-average of the imaginary part of the Love numbers $k^2_2$ in each region. In the case of Jupiter and Saturn-like planets, we show that the viscoelastic dissipation in the core could dominate the turbulent friction acting on tidal inertial waves in the envelope. However, the fluid dissipation would not be negligible. This demonstrates that it is necessary to build complete models of tidal dissipation in planetary interiors from their deep interior to their surface without any arbitrary a-priori.
description: 4 pages, 4 figures, accepted for publication in A&A as a Letter
Statistical Analysis of the Horizontal Divergent Flow in Emerging Solar Active Regions
Creators: name: Toriumi, Shin
name: Hayashi, Keiji
name: Yokoyama, Takaaki
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Solar active regions (ARs) are thought to be formed by magnetic fields from the convection zone. Our flux emergence simulations revealed that a strong horizontal divergent flow (HDF) of unmagnetized plasma appears at the photosphere before the flux begins to emerge. In our earlier study, we analyzed HMI data for a single AR and confirmed presence of this precursor plasma flow in the actual Sun. In this paper, as an extension of our earlier study, we conducted a statistical analysis of the HDFs to further investigate their characteristics and better determine the properties. From SDO/HMI data, we picked up 23 flux emergence events over a period of 14 months, the total flux of which ranges from 10^{20} to 10^{22} Mx. Out of 23 selected events, 6 clear HDFs were detected by the method we developed in our earlier study, and 7 HDFs detected by visual inspection were added to this statistic analysis. We found that the duration of the HDF is on average 61 minutes and the maximum HDF speed is on average 3.1 km s^{-1}. We also estimated the rising speed of the subsurface magnetic flux to be 0.6-1.4 km s^{-1}. These values are highly consistent with our previous one-event analysis as well as our simulation results. The observation results lead us to the conclusion that the HDF is rather a common feature in the earliest phase of AR emergence. Moreover, our HDF analysis has capability of determining the subsurface properties of emerging fields that cannot be directly measured.
description: 40 pages, 8 figures, 3 tables, accepted for publication in ApJ. A high-quality version can be found at http://www-space.eps.s.u-tokyo.ac.jp/~toriumi/toriumi2014apj.pdf
Einstein-aether scalar-tensor anisotropic constant-roll inflationary scenario in noncommutative phase space
Creators: name: Pasqua, Antonio
name: Gashti, Saeed Noori
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The primary purpose of this study is to investigate the constant-roll inflationary scenario with anisotropic conditions concerning the Einstein-aether Scalar-tensor cosmology in noncommutative phase space. We first introduce an Einstein-aether scalar-tensor cosmological model. In this structure, one can introduce an aether field with aether coefficients in the action integral of scalar-tensor. It will be a function of the scalar field, which is, in fact, a kind of extender of the Lorentz-violating theories. Hence, we present the point-like Lagrangian, which represents the field equations of the Einstein-aether scalar-tensor model. Then we calculate the Hamiltonian of our model directly. According to the noncommutative phase space characteristics, we will calculate the specific equations of this model. Then, according to the constant roll conditions, we take the anisotropic constant-roll inflationary scenario and calculate some cosmological parameters of the mentioned model, such as the Hubble parameter, potential, etc.
description: 25 pages
Supplementary document for Design, Optimization and Characterization of Deep Sub-Wavelength Evanescent Orders in Terahertz Metagratings - 6575627.pdf
Creators: name: Rane, Shreeya
name: Punjal, Ajinkya
name: Prabhu, Shriganesh
name: Chowdhury, Dibakar Roy
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: Uncategorized
Photonics, Optoelectronics and Optical Communications

description: Supplementary materials
La dimensione esterna dello spazio di libertà, sicurezza e giustizia. Sviluppi recenti e sfide aperte
Creators: name: Rizzo, Alfredo
Publisher: name: Universita' degli Studi di Salerno
Year: 2017
Subjects: Area of Freedom, Security and Justice
External dimension
Readmission agreements
EU-Turkey statement

description: The present paper investigates some recent developments related to the topic of the external dimension of the Area of Freedom Security and Justice (AFSJ). The proper qualification of the competence of the European Union in this area raises several questions. The article describes how these issues have been tackled inside the EU particularly in some specific cases, namely: concerning the external dimension of some topics related to the judicial cooperation in the civil sector; for the conclusion of readmission agreements concerning third country nationals; for the conclusion of an agreement with Turkey aimed at the resettlement of international protection seekers, taking into account that such agreement has so far been considered particularly controversial due to some serious shortcomings contained in it, specifically in terms of compliance with relevant human rights protection standards.
Rényi negativities in non-equilibrium open free-boson chains
Creators: name: Chen, Hui-Huang
Publisher: name: arXiv
Year: 2023
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, we consider the dynamics of Rényi negativities after a quantum quench in the free-boson chain with homogeneous dissipation. Initially we prepare the system in the squeezed thermal state, and then let it evolves under the tight-binding bosonic Hamiltonian with local linear dissipation. We use the Lindblad equation to solve the time evolution of the covariance matrix, from which one can obtain the time dependence of Rényi negativities. We are interested in the weak dissipation hydrodynamic limit where a quasi-particle picture emerges. In this limit, exact results of non-equilibrium dynamics of Rényi negativities can be obtained using the stationary phase method. We consider the Rényi negativities between both adjacent and disjoint regions in a infinite chain. We numerically test our analytical predictions and perfect matches have found.
description: 20 pages, 3 figures, published version
The Crepant Transformation Conjecture for Toric Complete Intersections
Creators: name: Coates, Tom
name: Iritani, Hiroshi
name: Jiang, Yunfeng
Publisher: name: arXiv
Year: 2014
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14N35 (Primary), 14A20, 14E16, 14F05, 53D45 (Secondary)

description: Let X and Y be K-equivalent toric Deligne-Mumford stacks related by a single toric wall-crossing. We prove the Crepant Transformation Conjecture in this case, fully-equivariantly and in genus zero. That is, we show that the equivariant quantum connections for X and Y become gauge-equivalent after analytic continuation in quantum parameters. Furthermore we identify the gauge transformation involved, which can be thought of as a linear symplectomorphism between the Givental spaces for X and Y, with a Fourier-Mukai transformation between the K-groups of X and Y, via an equivariant version of the Gamma-integral structure on quantum cohomology. We prove similar results for toric complete intersections. We impose only very weak geometric hypotheses on X and Y: they can be non-compact, for example, and need not be weak Fano or have Gorenstein coarse moduli space. Our main tools are the Mirror Theorems for toric Deligne-Mumford stacks and toric complete intersections, and the Mellin-Barnes method for analytic continuation of hypergeometric functions.
description: 61 pages, 3 figures. v2: abstract changed, references updated, remarks added
title: Η συμβολή του θεατρικού παιχνιδιού στην ανάδυση του γραμματισμού
titleType: AlternativeTitle
Creators: name: Μάνδαλου, Αποστολία
Publisher: name: University of Thessaly
Year: 2007
Subjects: subject: ΓΡΑΦΗ -- ΜΕΛΕΤΗ ΚΑΙ ΔΙΔΑΣΚΑΛΙΑ (ΠΡΟΣΧΟΛΙΚΗ)
subject: ΘΕΑΤΡΙΚΟ ΠΑΙΧΝΙΔΙ -- ΜΕΛΕΤΗ ΚΑΙ ΔΙΔΑΣΚΑΛΙΑ (ΠΡΟΣΧΟΛΙΚΗ)

description: Σημείωση διαθέτη: το περιεχόμενο έχει λογοκριθεί από τη συγγραφέα για λόγους προστασίας προσωπικών δεδομένων στις σελίδες του φυσικού τεκμηρίου: σελ. 110-115.
Characterization of the Cradle to Cradle Certified™ Products Program in the context of eco-labels and environmental declarations
Creators: name: Minkov, Nikolay
name: Bach, Vanessa
name: Finkbeiner, Matthias
Publisher: name: Technische Universität Berlin
Year: 2018
Subjects: subject: 338 Produktion
subject: cradle to cradle
subject: environmental labeling
subject: eco-label
subject: EPD
subject: characterization
subject: criteria
subject: ISO

description: (1) Background: The Cradle to Cradle Certified™ Products Program (C2C Certified for short) is a scheme for the certification of products that meet the criteria and principles of the Cradle to Cradle® design approach. The objective of this paper is to characterize C2C Certified as an instrument for external communication in the context of environmental labeling and declarations. (2) Method: An eco-label characterization scheme consisting of 22 attributes was used to analyze C2C Certified. In addition, it was compared with the established standardization labeling typologies, namely Type I and Type III. This was further illustrated in an example within the building and construction sector. (3) Results: C2C Certified can be classified neither as a Type I, nor a Type III label. The main weaknesses of C2C Certified from a labeling perspective are: the generic, but not product-specific focus of the awarding criteria, the lack of a life cycle perspective, and the incompletely transparent stakeholder involvement procedure. Nevertheless, for certain attributes (e.g., the awarding format), C2C Certified provides practical solutions and goes beyond a Type I eco-label. Substantial similarities between Type III declarations and C2C Certified cannot be identified. (4) Conclusions: The main advantages and shortcomings of C2C Certified from a labeling perspective are pointed out. The approach shows similarities to a Type I eco-label, and efforts toward conformance with the International Organization for Standardization (ISO) labelling standards would result in improving its comparability, recognition, and robustness.
Solving Odd-Fair Parity Games
Creators: name: Sağlam, Irmak
name: Schmuck, Anne-Kathrin
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Science and Game Theory (cs.GT)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper discusses the problem of efficiently solving parity games where player Odd has to obey an additional 'strong transition fairness constraint' on its vertices -- given that a player Odd vertex $v$ is visited infinitely often, a particular subset of the outgoing edges (called live edges) of $v$ has to be taken infinitely often. Such games, which we call 'Odd-fair parity games', naturally arise from abstractions of cyber-physical systems for planning and control. In this paper, we present a new Zielonka-type algorithm for solving Odd-fair parity games. This algorithm not only shares 'the same worst-case time complexity' as Zielonka's algorithm for (normal) parity games but also preserves the algorithmic advantage Zielonka's algorithm possesses over other parity solvers with exponential time complexity. We additionally introduce a formalization of Odd player winning strategies in such games, which were unexplored previous to this work. This formalization serves dual purposes: firstly, it enables us to prove our Zielonka-type algorithm; secondly, it stands as a noteworthy contribution in its own right, augmenting our understanding of additional fairness assumptions in two-player games.
description: To be published in FSTTCS 2023
The local bisection hypothesis for twisted groupoid C*-algebras
Creators: name: Armstrong, Becky
name: Brown, Jonathan H.
name: Clark, Lisa Orloff
name: Courtney, Kristin
name: Lin, Ying-Fen
name: McCormick, Kathryn
name: Ramagge, Jacqui
Publisher: name: arXiv
Year: 2023
Subjects: subject: Operator Algebras (math.OA)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 46L05 (primary), 22A22 (secondary)

description: In this note, we present criteria that are equivalent to a locally compact Hausdorff groupoid $G$ being effective. One of these conditions is that $G$ satisfies the "C*-algebraic local bisection hypothesis"; that is, that every normaliser in the reduced twisted groupoid C*-algebra is supported on an open bisection. The semigroup of normalisers plays a fundamental role in our proof, as does the semigroup of normalisers in cyclic group C*-algebras.
description: 11 pages. This version matches the version in Semigroup Forum
Proyecto El Aquelarre de las 7 Lunas. Aventura Protectoras de los 4 elementos".
Creators: name: Puerto, Desirée Ayuso Del
name: Esteban, Prudencia Gutiérrez
Publisher: name: Zenodo
Year: 2022
Subjects: Alfabetización Digital
Recursos Educativos Abiertos
Gamificación

description: Proyecto Docente de la asignatura: TIC aplicadas a la Educación Infantil de la Universidad de Extremadura. Curso 2021/2022. Este estudio ha sido financiado por el Ministerio de Ciencia, Innovación y Universidades, a través de un contrato para la Formación del Profesorado Universitario, para la primera autora (FPU18/03322).