cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Relativistic stellar modeling with perfect fluid core and anisotropic envelope fluid
Creators: name: Khunt, A. C.
name: Thomas, V. O.
name: Vinodkumar, P. C.
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We investigate the effect of density perturbations and local anisotropy on the stability of stellar matter structures in general relativity using the concept of cracking. Adopting a core-envelope model of a super-dense star, we examine the properties and stability conditions by introducing anisotropic pressure to the envelope region. Furthermore, we propose self-bound compact stars with an anisotropic envelope as a potential progenitor for starquakes. We show how the difference between sound propagation in radial and tangential directions would be used to identify potentially stable regions within a configuration. Due to an increase in the anisotropic parameter, strain energy accumulates in the envelope region and becomes a potential candidate for building-up quake like situation. This stress-energy stored in the envelope region that would be released during a starquake of a self-bound compact star is computed as a function of the magnitude of anisotropy at the core-envelope boundary. Numerical studies for spherically asymmetric compact stars indicate that the stress-energy can be as high as $10^{50}$ erg if the tangential pressure is slightly more significant than the radial pressure. It is happened to be of the same order as the energy associated with giant $γ$-ray bursts. Thus, the present study will be useful for the correlation studies between starquakes and GRBs.
description: 28 pages, 11 Figures, accepted for publication in Indian J. Phys
B-mode constraints from Planck low multipole polarisation data
Creators: name: de Belsunce, Roger
name: Gratton, Steven
name: Efstathiou, George
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present constraints on primordial B modes from large angular scale cosmic microwave background polarisation anisotropies measured with the Planck satellite. To remove Galactic polarised foregrounds, we use a Bayesian parametric component separation method, modelling synchrotron radiation as a power law and thermal dust emission as a modified blackbody. This method propagates uncertainties from the foreground cleaning into the noise covariance matrices of the maps. We construct two likelihoods: (i) a semi-analytical cross-spectrum-based likelihood-approximation scheme (momento) and (ii) an exact polarisation-only pixel-based likelihood (pixlike). Since momento is based on cross-spectra it is statistically less powerful than pixlike, but is less sensitive to systematic errors correlated across frequencies. Both likelihoods give a tensor-to-scalar ratio, r, that is consistent with zero from low multipole (2 <= ell < 30) Planck polarisation data. From full-mission maps we obtain r_0.05<0.274, at 95 per cent confidence, at a pivot scale of k = 0.05 Mpc^-1, using pixlike. momento gives a qualitatively similar but weaker 95 per cent confidence limit of r_0.05<0.408.
description: 10 pages, 7 figures
Total energy calculations using DFT+DMFT: computing the pressure phase diagram of the rare earth nickelates
Creators: name: Park, Hyowon
name: Millis, Andrew J.
name: Marianetti, Chris A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A full implementation of the $ab$ $initio$ density functional plus dynamical mean field theory (DFT+DMFT) formalism to perform total energy calculations and structural relaxations is proposed and implemented. The method is applied to the structural and metal-insulator transitions of the rare earth nickelate perovskites as a function of rare earth ion, pressure, and temperature. In contrast to previous DFT and DFT+$U$ theories, the present method accounts for the experimentally observed structure of $La$NiO$_3$ and the insulating nature of the other perovskites, and quantitatively reproduces the metal-insulator and structural phase diagram in the plane of pressure and rare earth element. The temperature dependence of the energetics of the phase transformation indicates that the thermal transition is driven by phonon entropy effects.
description: 5 pages, 4 figures
BGG reciprocity for current algebras
Creators: name: Chari, Vyjayanthi
name: Ion, Bogdan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Representation Theory (math.RT)
subject: Combinatorics (math.CO)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 17B10, 17B67

description: It was conjectured by Bennett, Chari, and Manning that a BGG-type reciprocity holds for the category of graded representations with finite-dimensional graded components for the current algebra associated to a simple Lie algebra. We associate a current algebra to any indecomposable affine Lie algebra and show that, in this generality, the BGG reciprocity is true for the corresponding category of representations.
description: 23 pg, corrections to Lemma 2.14
Modeling the Lyman-$α$ forest with Eulerian and SPH hydrodynamical methods
Creators: name: Chabanier, Solène
name: Emberson, J. D.
name: Lukić, Zarija
name: Pulido, Jesus
name: Habib, Salman
name: Rangel, Esteban
name: Sexton, Jean
name: Frontiere, Nicholas
name: Buehlmann, Michael
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We compare two state-of-the-art numerical codes to study the overall accuracy in modeling the intergalactic medium and reproducing Lyman-$α$ forest observables for DESI and high-resolution data sets. The codes employ different approaches to solving both gravity and modeling the gas hydrodynamics. The first code, Nyx, solves the Poisson equation using the Particle-Mesh (PM) method and the Euler equations using a finite volume method. The second code, \CRKHACC, uses a Tree-PM method to solve for gravity, and an improved Lagrangian smoothed particle hydrodynamics (SPH) technique, where fluid elements are modeled with particles, to treat the intergalactic gas. We compare the convergence behavior of the codes in flux statistics as well as the degree to which the codes agree in the converged limit. We find good agreement overall with differences being less than observational uncertainties, and a particularly notable $\lesssim$1\% agreement in the 1D flux power spectrum. This agreement was achieved by applying a tessellation methodology for reconstructing the density in \CRKHACC instead of using an SPH kernel as is standard practice. We show that use of the SPH kernel can lead to significant and unnecessary biases in flux statistics; this is especially prominent at high redshifts, $z \sim 5$, as the Lyman-$α$ forest mostly comes from lower-density regions which are intrinsically poorly sampled by SPH particles.
description: submitted to MNRAS
Small sets of locally indistinguishable orthogonal maximally entangled states
Creators: name: Cosentino, Alessandro
name: Russo, Vincent
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the problem of distinguishing quantum states using local operations and classical communication (LOCC). A question of fundamental interest is whether there exist sets of $k \leq d$ orthogonal maximally entangled states in $\mathbb{C}^{d}\otimes\mathbb{C}^{d}$ that are not perfectly distinguishable by LOCC. A recent result by Yu, Duan, and Ying [Phys. Rev. Lett. 109 020506 (2012) -- arXiv:1107.3224 [quant-ph]] gives an affirmative answer for the case $k = d$. We give, for the first time, a proof that such sets of states indeed exist even in the case $k < d$. Our result is constructive and holds for an even wider class of operations known as positive-partial-transpose measurements (PPT). The proof uses the characterization of the PPT-distinguishability problem as a semidefinite program.
description: 8 pages, single column, published version
EXONEST: Bayesian Model Selection Applied to the Detection and Characterization of Exoplanets Via Photometric Variations
Creators: name: Placek, Ben
name: Knuth, Kevin H.
name: Angerhausen, Daniel
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: EXONEST is an algorithm dedicated to detecting and characterizing the photometric signatures of exoplanets, which include reflection and thermal emission, Doppler boosting, and ellipsoidal variations. Using Bayesian Inference, we can test between competing models that describe the data as well as estimate model parameters. We demonstrate this approach by testing circular versus eccentric planetary orbital models, as well as testing for the presence or absence of four photometric effects. In addition to using Bayesian Model Selection, a unique aspect of EXONEST is the capability to distinguish between reflective and thermal contributions to the light curve. A case-study is presented using Kepler data recorded from the transiting planet KOI-13b. By considering only the non-transiting portions of the light curve, we demonstrate that it is possible to estimate the photometrically-relevant model parameters of KOI-13b. Furthermore, Bayesian model testing confirms that the orbit of KOI-13b has a detectable eccentricity.
description: Accepted for publication in The Astrophysical Journal
Nielsen equivalence in a class of random groups
Creators: name: Kapovich, Ilya
name: Weidmann, Richard
Publisher: name: arXiv
Year: 2013
Subjects: subject: Group Theory (math.GR)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: We show that for every $n\ge 2$ there exists a torsion-free one-ended word-hyperbolic group $G$ of rank $n$ admitting generating $n$-tuples $(a_1,\ldots ,a_n)$ and $(b_1,\ldots ,b_n)$ such that the $(2n-1)$-tuples $$(a_1,\ldots ,a_n, \underbrace{1,\ldots ,1}_{n-1 \text{times}})\hbox{ and }(b_1,\ldots, b_n, \underbrace{1,\ldots ,1}_{n-1 \text{times}})$$ are not Nielsen-equivalent in $G$. The group $G$ is produced via a probabilistic construction.
description: 34 pages, 2 figures; a revised final version, to appear in the Journal of Topology
title: Inhalt
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 18, Nr. 2 (1989), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
title: Intracellular signalling pathways activated by FcgammaRI
Creators: name: Melendez Romero, Alirio Jose
Publisher: name: University of Glasgow
Year: 1998
Subjects: subject: Immunology
subject: FOS: Clinical medicine

description: The high affinity receptor for immunoglobulin G, FcgammaRI,, plays a central role in host immune defence by linking the cellular and humoral arms of the immune system. However, the signalling pathways initiated by this receptor are poorly understood. In this thesis, the intracellular signalling pathways activated by immune complexes were studied using U937 cells as a model system to investigate the effect of differentiation on these pathways. Previous work has shown that, the nature and duration of the calcium transients initiated by immune complexes in these cells changes, as the cells differentiate into cells of a more macrophage phenotype. This thesis describes the signalling pathways underlying this change. Marked differentiation dependent differences in the signalling pathways activated by immune complexes were found. Thus, in cells differentiated to a more macrophage phenotype with dbcAMP, Fc receptor aggregation resulted in the activation of PLC. In cells primed with IFN-gamma, no activation of PLC could be detected. In contrast, immune complexes in these cells resulted in the activation of PLD. The switch in the activation of intracellular signalling pathways was found to result from a switch in the use of accessory molecules by FcgammaRI. Thus, in IFN-gamma primed cells, FcgammaRI signals through the recruitment of the gamma chain whereas in dbcAMP differentiated cells FcgammaRI appears to recruit FcgammaRIIa. A novel signalling pathway responsible for calcium transients and trafficking of immune complexes to lysosomes was identified. This pathway involved the sequential activation of PLD and sphingosine kinase with the generation of sphingosine-1-phosphate. In these cytokine primed cells, immune complexes also resulted in the activation of PI3-kinase. However, an unusual pattern of PIP3 production was observed. Both forms of Class I PI3-kinase were activated. Thus, the initial peak in PIP3 resulted from the activation of the tyrosine kinase (p85) dependent form of PI3-kinase, whereas the latter, prolonged elevation of PIP3, resulted from the activation of the betagamma dependent form of PI3-kinase. The switch in signalling pathway appears to dictate the isoform of PKC activated by FcgammaRI. Thus, in cytokine primed cells where PLD is activated and the resultant calcium transients are brief, only calcium independent isoforms were activated. In dbcAMP differentiated cells, where PLC activation results in prolonged calcium signals, only the calcium dependent PKC isoforms were activated.
A Global Model Approach to Robust Few-Shot SAR Automatic Target Recognition
Creators: name: Inkawhich, Nathan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: In real-world scenarios, it may not always be possible to collect hundreds of labeled samples per class for training deep learning-based SAR Automatic Target Recognition (ATR) models. This work specifically tackles the few-shot SAR ATR problem, where only a handful of labeled samples may be available to support the task of interest. Our approach is composed of two stages. In the first, a global representation model is trained via self-supervised learning on a large pool of diverse and unlabeled SAR data. In the second stage, the global model is used as a fixed feature extractor and a classifier is trained to partition the feature space given the few-shot support samples, while simultaneously being calibrated to detect anomalous inputs. Unlike competing approaches which require a pristine labeled dataset for pretraining via meta-learning, our approach learns highly transferable features from unlabeled data that have little-to-no relation to the downstream task. We evaluate our method in standard and extended MSTAR operating conditions and find it to achieve high accuracy and robust out-of-distribution detection in many different few-shot settings. Our results are particularly significant because they show the merit of a global model approach to SAR ATR, which makes minimal assumptions, and provides many axes for extendability.
Lu-H-N phase diagram from first-principles calculations
Creators: name: Xie, Fankai
name: Lu, Tenglong
name: Yu, Ze
name: Wang, Yaxian
name: Wang, Zongguo
name: Meng, Sheng
name: Liu, Miao
Publisher: name: arXiv
Year: 2023
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Using a comprehensive structure search and high-throughput first-principles calculations of 1483 compounds, this study presents the phase diagram of Lu-H-N. The formation energy landscape of Lu-H-N was derived and utilized to assess the thermodynamic stability of compounds. Results indicate that there are no stable Lu-H-N ternary structures in this system, but metastable ternary structures, such as Lu20H2N17 (C2/m), Lu2H2N (P3-m1), were observed with small Ehull (< 100 meV/atom). Moreover, applying hydrostatic pressure up to 10 GPa causes the energy convex hull of the Lu-H-N to shift its shape and stabilizes binary phases such as LuN9 and Lu10H21. Additionally, interstitial empty sites in LuH2 were noted, which may explain the formation of Lu10H21 and LuH3-xNy. To provide a basis for comparison, X-ray diffraction patterns and electronic structures of some compounds are also presented.
Pure anti-de Sitter supergravity and the conformal bootstrap
Creators: name: Alday, Luis F.
name: Chester, Shai M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider graviton scattering in maximal supergravity on Anti-de Sitter space (AdS) in $d+1$ dimensions for $d=3,4,\text{and $6$}$ with no extra compact spacetime factor. Holography suggests that this theory is dual to an exotic maximally supersymmetric conformal field theory (CFT) in $d$ dimensions whose only light single trace operator is the stress tensor. This contrasts with more standard cases like Type IIB string theory on $AdS_5\times S^5$ dual to $\mathcal{N}=4$ Super-Yang-Mills, where the CFT has light single trace operators for each Kaluza-Klein mode on $S^5$. We compute the 1-loop correction to the pure AdS$_{d+1}$ theory in a small Planck length expansion, which is dual to the large central charge expansion in the CFT. We find that this correction saturates the most general non-perturbative conformal bootstrap bounds on this correlator in the large central charge regime for $d=3,4,6$, while the 1-loop correction to CFTs with string/M-theory duals all lie inside the allowed region.
description: 6 pages plus appendices, 8 figures, v2 typos corrected and submitted for publication
Fourier-based schemes with modified Green operator for computing the electrical response of heterogeneous media with accurate local fields
Creators: name: Willot, François
name: Abdallah, Bassam
name: Pellegrini, Yves-Patrick
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A modified Green operator is proposed as an improvement of Fourier-based numerical schemes commonly used for computing the electrical or thermal response of heterogeneous media. Contrary to other methods, the number of iterations necessary to achieve convergence tends to a finite value when the contrast of properties between the phases becomes infinite. Furthermore, it is shown that the method produces much more accurate local fields inside highly-conducting and quasi-insulating phases, as well as in the vicinity of the phases interfaces. These good properties stem from the discretization of Green's function, which is consistent with the pixel grid while retaining the local nature of the operator that acts on the polarization field. Finally, a fast implementation of the "direct scheme" of Moulinec et al. (1994) that allows for parcimonious memory use is proposed.
description: v2: `postprint' document (a few remaining typos in the published version herein corrected in red; results unchanged)
A Vertical Architecture for Increasing Photogalvanic Solar Cell Efficiency: Theory and Modeling
Creators: name: Mahmoudzadeh, Mohammad Ali
name: Madden, John D. W.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Photogalvanic solar cells, the original dye based solar cell, have yet to fulfill their promise as a low fabrication cost, scalable energy conversion system. The efficient performance of photogalvanic cells relies on high dye solubility and selective electrodes with fast electron transfer kinetics. A new configuration is proposed for the photogalvanic cells that removes these impractical requirements. Instead of illuminating the device through the electrode, as is the conventional approach, a new vertical configuration is employed with light coming between the two electrodes. This way, the light absorption and hence electron generation is spread through the depth of the device. As a result, unreasonably fast electrode kinetics are no longer required. The depth can be adjusted according to the concentration of the dyes, and thus deeper cells enable low solubility dyes to be employed. The proposed configuration is mathematically modeled and the advantages over the conventional cell are shown. A numerical model is built for more detailed analysis that gives practical guidelines for working towards device parameters with high power conversion efficiency. The analysis suggests that upon the realization of highly selective electrodes and an improved dye/mediator couple, an efficiency of 13% should be achievable from the new configuration.
description: 23 pages, 5 Figures, 4 Tables
Finite orbit decomposition of real flag manifolds
Creators: name: Krötz, Bernhard
name: Schlichtkrull, Henrik
Publisher: name: arXiv
Year: 2013
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: Let G be a connected real semi-simple Lie group and H a closed connected subgroup. Let P be a minimal parabolic subgroup of G. It is shown that H has an open orbit on the flag manifold G/P if and only if it has finitely many orbits on G/P. This confirms a conjecture by T. Matsuki.
title: Romanik in Baden-Württemberg ; Das Romanische Haus in Seligenstadt
Creators: name: Strobel, Richard
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 18, Nr. 2 (1989), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Appendix 1 for "Contribution of financial management to the digital competitiveness"
Creators: name: Mezinova, Inga
name: Lazareva, Natalia
name: Malinina, Olga
name: Israilova, Elima
name: Magomedov, Magomedgabiv
Publisher: name: figshare
Year: 2022
Subjects: subject: 140202 Economic Development and Growth
subject: FOS: Economics and business
subject: Economics
subject: 140207 Financial Economics

description: Annex to book chapter "Contribution of financial management to the digital competitiveness" Table 1 "Ranked indicators in WEF Global Competitiveness Report and IMD World Competitiveness Yearbook, referring to finance" and Table 2 "Ranked indicators in WEF Global Competitiveness Report and IMD World Competitiveness Yearbook, referring to digital dimension"
 Source: Source: compound by authors using 1. WEF. (2019). Global Competitiveness Report 2019. URL: http://www3.weforum.org/docs/WEF_TheGlobalCompetitivenessReport2019.pdf (Accessed 31.08.2022) 2. IMD. (2020). World Competitiveness Yearbook 2020. URL: https://www.imd.org/research-knowledge/books/world-competitiveness-yearbook-2020/ (Accessed 31.08.2022)
Semidefinite Programming Based Preconditioning for More Robust Near-Separable Nonnegative Matrix Factorization
Creators: name: Gillis, Nicolas
name: Vavasis, Stephen A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Nonnegative matrix factorization (NMF) under the separability assumption can provably be solved efficiently, even in the presence of noise, and has been shown to be a powerful technique in document classification and hyperspectral unmixing. This problem is referred to as near-separable NMF and requires that there exists a cone spanned by a small subset of the columns of the input nonnegative matrix approximately containing all columns. In this paper, we propose a preconditioning based on semidefinite programming making the input matrix well-conditioned. This in turn can improve significantly the performance of near-separable NMF algorithms which is illustrated on the popular successive projection algorithm (SPA). The new preconditioned SPA is provably more robust to noise, and outperforms SPA on several synthetic data sets. We also show how an active-set method allow us to apply the preconditioning on large-scale real-world hyperspectral images.
description: 25 pages, 6 figures, 4 tables. New numerical experiments, additional remarks and comments
One-dimensional MHD flows with cylindrical symmetry: Lie symmetries and conservation laws
Creators: name: Dorodnitsyn, Vladimir A.
name: Kaptsov, Evgeniy I.
name: Kozlov, Roman V.
name: Meleshko, Sergey V.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A recent paper considered symmetries and conservation laws of the plane one-dimensional flows for magnetohydrodynamics in the mass Lagrangian coordinates. This paper analyses the one-dimensional magnetohydrodynamics flows with cylindrical symmetry in the mass Lagrangian coordinates. The medium is assumed inviscid and thermally non-conducting. It is modeled by a polytropic gas. Symmetries and conservation laws are found. The cases of finite and infinite electric conductivity need to be analyzed separately. For finite electric conductivity $σ(ρ,p)$ we perform Lie group classification, which identifies $σ(ρ,p)$ cases with additional symmetries. The conservation laws are found by direct computation. For cases with infinite electric conductivity variational formulations of the equations are considered. Lie group classifications are obtained with the entropy treated as an arbitrary element. A variational formulation allows to use the Noether theorem for computation of conservation laws. The conservation laws obtained for the variational equations are also presented in the original (physical) variables.
Stability, Categoricity and Axiomatization of Abstract Elementary Classes
Creators: name: Leung, Wang Chi
Publisher: name: Carnegie Mellon University
Year: 2023
Subjects: subject: 10107 Mathematical Logic, Set Theory, Lattices and Universal Algebra
subject: FOS: Mathematics

description: We extend current results on abstract elementary classes (AECs) in terms of stability, categoricity and axiomatization theorems. In most cases, we assume the existence of a monster model as well as tameness. The first two chapters introduce readers to the major questions and basic notions of AECs. The subsequent four chapters are the author’s papers written during his PhD program, each with its own abstract, introduction and results. The last chapter uses known results to derive a new categoricity transfer.
title: Die Dienststellen des Landesdenkmalamtes
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 18, Nr. 2 (1989), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Degenerations of Complex Dynamical Systems II: Analytic and Algebraic Stability
Creators: name: DeMarco, Laura
name: Faber, Xander
name: Kiwi, with an appendix by Jan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37F10, 37P50 (primary), 37F45 (secondary)

description: We study pairs $(f, Γ)$ consisting of a non-Archimedean rational function $f$ and a finite set of vertices $Γ$ in the Berkovich projective line, under a certain stability hypothesis. We prove that stability can always be attained by enlarging the vertex set $Γ$. As a byproduct, we deduce that meromorphic maps preserving the fibers of a rationally-fibered complex surface are algebraically stable after a proper modification. The first article in this series examined the limit of the equilibrium measures for a degenerating 1-parameter family of rational functions on the Riemann sphere. Here we construct a convergent countable-state Markov chain that computes the limit measure. A classification of the periodic Fatou components for non-Archimedean rational functions, due to Rivera-Letelier, plays a key role in the proofs of our main theorems. The appendix contains a proof of this classification for all tame rational functions.
description: * Added appendix by Jan Kiwi on classification of periodic Fatou components (due to Rivera-Letelier) * To appear in Mathematische Annalen: The final publication is available at Springer via http://dx.doi.org/10.1007/s00208-015-1331-8
Sourcing, quality and pricing decisions for store brand product introduction
Creators: name: Al Monawer, Nasser
Publisher: name: No Publisher Supplied
Year: 2022

description: The store brand phenomenon has become popular among stores in recent years. A few well-known examples are Costco’s Kirkland Signature, Great Value’s Walmart, or Ama- zonBasic brands. The vital reason for this successful practice of store brands is that it may benefit both manufacturers and retailers. When the retailer launches its own store brand with the collaboration of the national brand manufacturer, the supply chain can diversify its product portfolio and serve more consumers from different segments while better utilizing the manufacturer’s capacity. Several studies demonstrate that retailers and manufacturers can collaborate to introduce store brands and eventually find a win-win partnership. Con- versely, these norms are shifting, with many retailers opting to outsource to a third-party manufacturer or produce them in-house. Although some research sheds light on store brand practices, no identified study has incorporated brand images and consumers’ willingness- to-pay for quality simultaneously. This research, different from the previous studies, fo- cuses on how brand images of the retailer can motivate the manufacturer’s willingness-to- collaborate when the retailer wants to introduce the store brand product into the supply chain. In addition, the research focus is then to explore the interactions between sourcing decisions, product quality, and pricing decisions from the retailer’s perspective. We argue that there are significant benefits associated with producing the store brand in-house rather than outsourcing to the national brand manufacturer. Interestingly, we find that under the in-house production option for the store brand product, the store brand product quality may be higher than that of the national brand product, though this will never happen under the outsourcing setting to the national manufacturer. Moreover, we address some tangible examples of how those benefits might play out in a real-world setting.
MeerKAT's View of the Bullet Cluster 1E 0657-55.8
Creators: name: Sikhosana, S. P.
name: Knowles, K.
name: Hilton, M.
name: Moodley, K.
name: Murgia, M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Bullet cluster (1E 0657-55.8) is a massive merging system at redshift $z$=0.296, known to host a powerful radio halo and a relic. Here we present high fidelity MeerKAT L-band (0.9-1.7 GHz) observations of the Bullet cluster, in which we trace a larger extent of both the radio halo and relic in comparison to previous studies. The size of the recovered radio halo is 1.6 Mpc $\times$ 1.3 Mpc and the largest linear size of the relic is ~988 kpc. We detect a new decrement feature on the southern outskirts of the halo emission, where a region appears to have a lower surface brightness in comparison to its surroundings. The larger extension on the outskirts of the halo is faint, which suggests lower relativistic electron density or a weaker magnetic field. An in-band spectral index map of the radio halo reveals a hint of radial steepening towards the edges of the diffuse source, likely due to synchrotron electron ageing. The integrated spectral index of the radio halo is 1.1$\pm$0.2. We perform a radio-X-ray surface brightness point-to-point analysis, which reveals a linear correlation for the radio halo. This indicates that the radio halo emission is produced by primary re-acceleration mechanisms. Finally, we derive a radio Mach number of M_R= 4.6$\pm$0.9 for the relic shock region, which is higher than the Mach number inferred by earlier analyses based on X-ray data. Discrepancies between radio and X-ray Mach numbers have been observed for multiple systems, with studies suggesting that this is due to various factors, including relic orientation.
description: 11 pages, 6 figures. Revised and accepted version; accepted by MNRAS
title: Die Brücke über den Erlengraben bei Ettlingen - ein Denkmal aus der Frühzeit der Großherzoglich Badischen Eisenbahn
Creators: name: Boeyng, Ulrich
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 18, Nr. 3 (1989), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Non-commutative integration, zeta functions and the Haar state for $SU_{q}(2)$
Creators: name: Matassa, Marco
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: Operator Algebras (math.OA)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We study a notion of non-commutative integration, in the spirit of modular spectral triples, for the quantum group $SU_{q}(2)$. In particular we define the non-commutative integral as the residue at the spectral dimension of a zeta function, which is constructed using a Dirac operator and a weight. We consider the Dirac operator introduced by Kaad and Senior and a family of weights depending on two parameters, which are related to the diagonal automorphisms of $SU_{q}(2)$. We show that, after fixing one of the parameters, the non-commutative integral coincides with the Haar state of $SU_{q}(2)$. Moreover we can impose an additional condition on the zeta function, which also fixes the second parameter. For this unique choice the spectral dimension coincides with the classical dimension.
description: 22 pages. Revised version, submitted for publication
Pattern of inclusions inside rippled icicles
Creators: name: Ladan, John
name: Morris, Stephen W.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: Icicles that have grown from slightly impure water develop ripples around their circumference. The ripples have a near-universal wavelength and are thought to be the result of a morphological instability. Using laboratory-grown icicles and various species of impurities, including fluorescent dye, we show that a certain fraction of the impurities remain trapped inside the icicle, forming inclusions within the ice. The inclusions are organized into chevron patterns aligned with the peaks of the ripples. Within the chevrons, a substructure of crescent-shaped structures is observed. We also examine the crystal grain structure of laboratory icicles, with and without impurities. We present the first detailed study of these growth patterns in the interior of icicles, and discuss their implications for the mechanism of the ripple-forming instability.
description: 11 pages, 10 figures. To be published in Phys Rev E
Topics on Modeling High Dimensional Time Series Data
Creators: name: Sun, Yifan
Publisher: name: Carnegie Mellon University
Year: 2023
Subjects: subject: Statistics
subject: FOS: Mathematics

description: This thesis covers three topics. The first topic studies how to find compact state embeddings from high-dimensional Markov state trajectories, where the transition kernel has a small intrinsic rank. We propose an efficient method for learning a low dimensional state embedding with Reproducing Kernel Hilbert Space. State embedding can be used to cluster states into metastable sets, thereby identifying the slow dynamics. The second topic studies how to extract governing differential equation models from time-series and spatio-temporal dataset with neural network, the method also sheds light on downsizing the popular convolutional neural network structures while maintaining the same model accuracy. The third topic focuses on how to combine deep neural network and optimal control theory to design a trading strategy when asset prices are mean reverting with proportional transaction costs, the method is shown to outperform asymptotic optimal strategies derived from homogenization technique. Our approach overcomes curse of dimensionality of free boundary problem and is scalable towards higher dimensions
Convocatoria laboral - Coordinación de Proyecto y Desarrollo de Cursos
Creators: name: MetaDocencia Team
Publisher: name: Zenodo
Year: 2022

description: Este documento contiene la información que se puso a disposición para la convocatoria a sumarse al equipo de MetaDocencia: - Contexto organizacional - Responsabilidades para el rol - Criterios de selección claves - Compensación
Multiresonant metasurfaces for arbitrarily-broadband pulse chirping and dispersion compensation
Creators: name: Tsilipakos, Odysseas
name: Koschny, Thomas
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We show that ultrathin metasurfaces with a specific multiresonant response can enable simultaneously arbitrarily-strong and arbitrarily-broadband dispersion compensation, pulse (de-)chirping and compression or broadening. This breakthrough overcomes the fundamental limitations of both conventional non-resonant approaches (bulky) and modern singly-resonant metasurfaces (narrowband) for quadratic phase manipulations of electromagnetic signals. The required non-uniform trains of resonances in the electric and magnetic sheet conductivities that completely control phase delay, group delay, and chirp, are rigorously derived and the limitations imposed by fundamental physical constraints are thoroughly discussed. Subsequently, a practical, truncated approximation by finite sequences of physically-realizable linear resonances is constructed and the associated error is quantified. By appropriate spectral ordering of the resonances, operation can be achieved either in transmission or reflection mode, enabling full space coverage. The proposed concept is not limited to dispersion compensation, but introduces a generic and powerful ultrathin platform for the spatio-temporal control of broadband real-world signals with a myriad of applications in modern optics, microwave photonics, radar and communication systems.
description: 23 pages, 14 figures
title: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 18, Nr. 4 (1989)
Creators: name: Denkmalpflege In Baden-Württemberg – Nachrichtenblatt Der Landesdenkmalpflege
Publisher: name: University Library Heidelberg
Year: 2014

description: Inhalt
 Substanzerhaltung und Ersatzstoffe...161-166
 Fensterinstandsetzung contra Fensterersatz...167-169
 Die Geschichte der Inkas - als Wanddekoration in einem ehemaligen Gasthaussaal in Weil am Rhein-Ötlingen...170-173
 Slawische Keramikfunde in Unterregenbach...174-179
 Anthropogene Geländeformen Zwei Beispiele einer noch wenig beachteten Denkmälergruppe...180-181
 Das Maulbronner Wassersystem - Relikte zisterziensischer Agrarwirtschaft und Wasserbautechnik im heutigen Landschaftsbild...181-191
 Die drei ehemaligen herzoglich-württembergischen Fischweiher bei Nabern (Kreis Esslingen). Ein gefährdetes Zeugnis der herrschaftlichen Teichwirtschaft des späten Mittelalters und der frühen Neuzeit...192-197
 Spätbronzezeitliche Siedlungsreste bei Römerstein-Zainingen, Kreis Reutlingen - Schule und Denkmalpflege...198-201
 Denkmalpflege der Deutschen Demokratischen Republik zu Gast...202
 Personalia...203
 Denkmalschutzgesetz für Baden-Württemberg. Kommentar mit ergänzenden Rechts- und Verwaltungsvorschriften ; Quellennachweis für die Abbildungen...203-204
 Veröffentlichungen des Landesdenkmalamtes
 Die Dienststellen des Landesdenkmalamtes
The algebra of conditional sets and the concepts of conditional topology and compactness
Creators: name: Drapeau, Samuel
name: Jamneshan, Asgar
name: Karliczek, Martin
name: Kupper, Michael
Publisher: name: arXiv
Year: 2013
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 03E70

description: The concepts of a conditional set, a conditional inclusion relation and a conditional Cartesian product are introduced. The resulting conditional set theory is sufficiently rich in order to construct a conditional topology, a conditional real and functional analysis indicating the possibility of a mathematical discourse based on conditional sets. It is proved that the conditional power set is a complete Boolean algebra, and a conditional version of the axiom of choice, the ultrafilter lemma, Tychonoff's theorem, the Borel-Lebesgue theorem, the Hahn-Banach theorem, the Banach-Alaoglu theorem and the Krein-Šmulian theorem are shown.
description: 29 pages
title: Die drei ehemaligen herzoglich-württembergischen Fischweiher bei Nabern (Kreis Esslingen). Ein gefährdetes Zeugnis der herrschaftlichen Teichwirtschaft des späten Mittelalters und der frühen Neuzeit
Creators: name: Schneider, Alois
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 18, Nr. 4 (1989), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
title: Denkmalpflege der Deutschen Demokratischen Republik zu Gast
Creators: name: Ast, Doris
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 18, Nr. 4 (1989), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Measurement of High Density Electrons Above a Helium Film on an Amorphous Metal Substrate
Creators: name: Castoria, K. E.
name: Lyon, S. A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We have measured two-dimensional electron systems bound to a thin helium film supported by a metallic substrate. We report on our measurement of electron density obtained via a Kelvin probe technique. The underlying metallic substrate is an amorphous metallic alloy (TaWSi), which can support large uniform densities due to its low surface roughness and homogeneous work function. We find that this substrate is able to support high enough densities that the electrons are expected to be Fermi-degenerate.
description: 13 Pages, 4 Figures
title: Über den Denkmalwert des Unerfreulichen. Ein Wandgemälde von 1937
Creators: name: Schmidt, Leo
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 19, Nr. 1 (1990), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Two is better than one: using a single emotion lexicon can lead to unreliable conclusions
Creators: name: Czarnek, G
name: Stillwell, D
Publisher: name: Apollo - University of Cambridge Repository
Year: 2022
Subjects: subject: Research Article
subject: Social sciences
subject: FOS: Social sciences
subject: Biology and life sciences
subject: Computer and information sciences
subject: FOS: Computer and information sciences
subject: People and places

description: Acknowledgements: We would like to thank Sylwia Adamus, Rachela Antosz-Rekucka, Monika Biały, Jakub Cacek, Zuzanna Garncarek, Katarzyna Hryniewiecka, and Ewa Ilczuk from Jagiellonian University who contributed to data collection.
description: Emotion lexicons became a popular method for quantifying affect in large amounts of textual data (e.g., social media posts). There are multiple independently developed emotion lexicons which tend to correlate positively with one another but not entirely. Such differences between lexicons may not matter if they are just unsystematic noise, but if there are systematic differences this could affect conclusions of a study. The goal of this paper is to examine whether two extensively used, apparently domain-independent lexicons for emotion analysis would give the same answer to a theory-driven research question. Specifically, we use the Linguistic Inquiry and Word Count (LIWC) and NRC Word-Emotion Association Lexicon (NRC). As an example, we investigate whether older people have more positive expression through their language use. We examined nearly 5 million tweets created by 3,573 people between 18 to 78 years old and found that both methods show an increase in positive affect until age 50. After that age, however, according to LIWC, positive affect drops sharply, whereas according to NRC, the growth of positive affect increases steadily until age 65 and then levels off. Thus, using one or the other method would lead researchers to drastically different theoretical conclusions regarding affect in older age. We unpack why the two methods give inconsistent conclusions and show this was mostly due to a particular class of words: those related to politics. We conclude that using a single lexicon might lead to unreliable conclusions, so we suggest that researchers should routinely use at least two lexicons. If both lexicons come to the same conclusion then the research evidence is reliable, but if not then researchers should further examine the lexicons to find out what difference might be causing inconclusive result.
What Next-Generation 21 cm Power Spectrum Measurements Can Teach Us About the Epoch of Reionization
Creators: name: Pober, Jonathan C.
name: Liu, Adrian
name: Dillon, Joshua S.
name: Aguirre, James E.
name: Bowman, Judd D.
name: Bradley, Richard F.
name: Carilli, Chris L.
name: DeBoer, David R.
name: Hewitt, Jacqueline N.
name: Jacobs, Daniel C.
name: McQuinn, Matthew
name: Morales, Miguel F.
name: Parsons, Aaron R.
name: Tegmark, Max
name: Werthimer, Dan J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: A number of experiments are currently working towards a measurement of the 21 cm signal from the Epoch of Reionization. Whether or not these experiments deliver a detection of cosmological emission, their limited sensitivity will prevent them from providing detailed information about the astrophysics of reionization. In this work, we consider what types of measurements will be enabled by a next-generation of larger 21 cm EoR telescopes. To calculate the type of constraints that will be possible with such arrays, we use simple models for the instrument, foreground emission, and the reionization history. We focus primarily on an instrument modeled after the $\sim 0.1~\rm{km}^2$ collecting area Hydrogen Epoch of Reionization Array (HERA) concept design, and parameterize the uncertainties with regard to foreground emission by considering different limits to the recently described "wedge" footprint in k-space. Uncertainties in the reionization history are accounted for using a series of simulations which vary the ionizing efficiency and minimum virial temperature of the galaxies responsible for reionization, as well as the mean free path of ionizing photons through the IGM. Given various combinations of models, we consider the significance of the possible power spectrum detections, the ability to trace the power spectrum evolution versus redshift, the detectability of salient power spectrum features, and the achievable level of quantitative constraints on astrophysical parameters. Ultimately, we find that $0.1~\rm{km}^2$ of collecting area is enough to ensure a very high significance ($\gtrsim30σ$) detection of the reionization power spectrum in even the most pessimistic scenarios. This sensitivity should allow for meaningful constraints on the reionization history and astrophysical parameters, especially if foreground subtraction techniques can be improved and successfully implemented.
description: 27 pages, 18 figures, updated SKA numbers in appendix
title: Die Dienststellen des Landesdenkmalamtes
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 19, Nr. 1 (1990), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4