cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
MITOLOGIA DE LA A A LA Z ePub gratis
Creators: name: Whistler
Publisher: name: Zenodo
Year: 2024

description: MITOLOGIA DE LA A A LA Z de ANNETTE GIESECKE

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Ficha técnica

MITOLOGIA DE LA A A LA Z

ANNETTE GIESECKE

Idioma: CASTELLANO

Formatos: Pdf, ePub, MOBI, FB2

ISBN: 9788412386158

Editorial: FOLIOSCOPIO

Año de edición: 2022

 

 

 

 

 

Descargas de libros de epub de Google MITOLOGIA DE LA A A LA Z (Spanish Edition) RTF de ANNETTE GIESECKE 9788412386158

 

Overview

Una guía completa y fascinante de la mitología griega y romana que relata con claridad y audacia los detalles de más de setecientos personajes y lugares que forman parte de la identidad cultural de occidente. Desde los dioses y diosas del Olimpo y los héroes de la Guerra de Troya hasta las ninfas, monstruos y otras criaturas míticas que pueblan estas antiguas historias. Cada definición incluye referencias cruzadas a personajes, lugares y mitos relacionados, así como su equivalente en la mitología y el culto romanos. Esta edición ilustrada incluye diez láminas a color, árboles genealógicos y numerosas ilustraciones a dos tintas del excepcional artista e ilustrador Jim Tierney.
(3127) Frederick Mossman
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
Supplementary Tables from The sex-specific effects of diet quality versus quantity on morphology in Drosophila melanogaster
Creators: name: Shingleton, Alexander W.
name: Masandika, Josephine R.
name: Thorsen, Lily S.
name: Yuqing Zhu
name: Mirth, Christen K.
Publisher: name: The Royal Society
Year: 2017
Subjects: subject: Physiology
subject: FOS: Biological sciences
subject: Developmental Biology

description: Additional Results Tables
Asymptotic results for maximum likelihood estimators in joint analysis of repeated measurements and survival time
Creators: name: Cai, Jianwen
name: Zeng, Donglin
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2005

description: Maximum likelihood estimation has been extensively used in the joint analysis of repeated measurements and survival time. However, there is a lack of theoretical justification of the asymptotic properties for the maximum likelihood estimators. This paper intends to fill this gap. Specifically, we prove the consistency of the maximum likelihood estimators and derive their asymptotic distributions. The maximum likelihood estimators are shown to be semiparametrically efficient.
Modular quasi-Hopf algebras and groups with one involution
Creators: name: Mason, Geoffrey
name: Ng, Siu-Hung
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Algebra (math.QA)
subject: Category Theory (math.CT)
subject: Group Theory (math.GR)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics

description: In a previous paper the authors constructed a class of quasi-Hopf algebras $D^ω(G, A)$ associated to a finite group $G$, generalizing the twisted quantum double construction. We gave necessary and sufficient conditions, cohomological in nature, that the corresponding module category $Rep(D^ω(G, A))$ is a modular tensor category.\ In the present paper we verify the cohomological conditions for the class of groups $G$ which \emph{contain a unique involution}, and in this way we obtain an explicit construction of a new class of modular quasi-Hopf algebras.\ We develop the basic theory for general finite groups $G$, and also a parallel theory concerned with the question of when $Rep(D^ω(G, A))$ is super-modular rather than modular. We give some explicit examples involving binary polyhedral groups and some sporadic simple groups.
description: 27 pages Latex
File S4 from Bird and bat species' global vulnerability to collision mortality at wind farms revealed through a trait-based assessment.
Creators: name: Thaxter, Chris B.
name: Buchanan, Graeme M.
name: Carr, Jamie
name: Butchart, Stuart H. M.
name: Newbold, Tim
name: Green, Rhys E.
name: Tobias, Joseph A.
name: Foden, Wendy B.
name: O'Brien, Sue
name: Pearce-Higgins, James W.
Publisher: name: The Royal Society
Year: 2017
Subjects: subject: Ecology
subject: FOS: Biological sciences

description: Model predictions of collisions per turbine per year for bat species worldwide.
Weihrauch Complexity and the Hagen School of Computable Analysis
Creators: name: Brattka, Vasco
Publisher: name: arXiv
Year: 2022
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics

description: Weihrauch complexity is now an established and active part of mathematical logic. It can be seen as a computability-theoretic approach to classifying the uniform computational content of mathematical problems. This theory has become an important interface between more proof-theoretic and more computability-theoretic studies in the realm of reverse mathematics. Here we present a historical account of the early developments of Weihrauch complexity by the Hagen school of computable analysis that started more than thirty years ago, and we indicate how this has influenced, informed, and anticipated more recent developments of the subject.
Microwave-induced dynamic switching of magnetic skyrmion cores in nanodots
Creators: name: Zhang, Bin
name: Wang, Weiwei
name: Beg, Marijan
name: Fangohr, Hans
name: Kuch, Wolfgang
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The nonlinear dynamic behavior of a magnetic skyrmion in circular nanodots was studied numerically by solving the Landau-Lifshitz-Gilbert equation with a classical spin model. We show that a skyrmion core reversal can be achieved within nanoseconds using a perpendicular oscillating magnetic field. Two symmetric switching processes that correspond to excitations of the breathing mode and the mixed mode (combination of the breathing mode and a radial spin-wave mode) are identified. For excitation of the breathing mode, the skyrmion core switches through nucleation of a new core from a transient uniform state. In the mixed mode, the skyrmion core reverses with the help of spins excited both at the edge and core regions. Unlike the magnetic vortex core reversal, the excitation of radial spin waves does not dominate the skyrmion core reversal process.
(3120) Margaret Neill
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
Kinematics and chemistry of recently discovered Reticulum 2 and Horologium 1 dwarf galaxies
Creators: name: Koposov, Sergey E.
name: Casey, Andrew R.
name: Belokurov, Vasily
name: Lewis, James R.
name: Gilmore, Gerard
name: Worley, Clare
name: Hourihane, Anna
name: Bensby, T.
name: Bragaglia, A.
name: Bergemann, M.
name: Carraro, G.
name: Flaccomio, E.
name: Heiter, U.
name: Hill, V.
name: Jofre, P.
name: de Laverny, P.
name: Monaco, L.
name: Sbordone, L.
name: Mikolaitis, S.
name: Ryde, N.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Photometry alone is not sufficient to unambiguously distinguish between ultra-faint star clusters and dwarf galaxies because of their overlap in morphological properties. Here we report on VLT/GIRAFFE spectra of candidate member stars in two recently discovered ultra-faint satellites Reticulum 2 and Horologium 1, obtained as part of the ongoing Gaia-ESO Survey. We identify 18 members in Reticulum 2 and 5 in Horologium 1. We find Reticulum 2 to have a velocity dispersion of ~3.22 km/s, implying a M/L ratio of ~ 500. We have inferred stellar parameters for all candidates and we find Reticulum 2 to have a mean metallicity of [Fe/H] = -2.46+/-0.1, with an intrinsic dispersion of ~ 0.29, and is alpha-enhanced to the level of [alpha/Fe]~0.4. We conclude that Reticulum 2 is a dwarf galaxy. We also report on the serendipitous discovery of four stars in a previously unknown stellar substructure near Reticulum 2 with [Fe/H] ~ -2 and V_hel ~ 220 km/s, far from the systemic velocity of Reticulum 2. For Horologium 1 we infer a velocity dispersion of 4.9^{+2.8}_{-0.9} km/s and a consequent M/L ratio of ~ 600, leading us to conclude that Horologium 1 is also a dwarf galaxy. Horologium 1 is slightly more metal-poor than Reticulum 2 [Fe/H] = -2.76 +/- 0.1 and is similarly alpha-enhanced: [alpha/Fe] ~ 0.3. Despite a large error-bar, we also measure a significant spread of metallicities of 0.17 dex which strengthen the evidence that Horologium 1 is indeed a dwarf galaxy. The line-of-sight velocity of Reticulum 2 is offset by some 100 km/s from the prediction of the orbital velocity of the LMC, thus making its association with the Cloud uncertain. However, at the location of Horologium 1, both the backward integrated LMC's orbit and the LMC's halo are predicted to have radial velocities similar to that of the dwarf. Therefore, it is likely that Horologium 1 is or once was a member of the Magellanic Family.
description: submitted to ApJ, abstract abridged
The topography of multivariate normal mixtures
Creators: name: Ray, Surajit
name: Lindsay, Bruce G.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2005

description: Multivariate normal mixtures provide a flexible method of fitting high-dimensional data. It is shown that their topography, in the sense of their key features as a density, can be analyzed rigorously in lower dimensions by use of a ridgeline manifold that contains all critical points, as well as the ridges of the density. A plot of the elevations on the ridgeline shows the key features of the mixed density. In addition, by use of the ridgeline, we uncover a function that determines the number of modes of the mixed density when there are two components being mixed. A followup analysis then gives a curvature function that can be used to prove a set of modality theorems.
ESTUCHE CUANDO NO QUEDEN MAS ESTRELLAS QUE CONTAR + LO QUE LA NIE VE SUSURRA AL C EBOOK | MARIA MARTINEZ. | Descargar libro PDF EPUB
Creators: name: Green
Publisher: name: Zenodo
Year: 2024

description: ESTUCHE CUANDO NO QUEDEN MAS ESTRELLAS QUE CONTAR + LO QUE LA NIE VE SUSURRA AL C de MARIA MARTINEZ.

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ESTUCHE CUANDO NO QUEDEN MAS ESTRELLAS QUE CONTAR + LO QUE LA NIE VE SUSURRA AL C

MARIA MARTINEZ.

Idioma: CASTELLANO

Formatos: Pdf, ePub, MOBI, FB2

ISBN: 9788408278801

Editorial: PLANETA

Año de edición: 2023

 

 

 

 

 

Descargar libro electrónico para smartphone ESTUCHE CUANDO NO QUEDEN MAS ESTRELLAS QUE CONTAR + LO QUE LA NIE VE SUSURRA AL C en español 9788408278801 MOBI de MARIA MARTINEZ.

 

Overview

Un estuche con la novedad de la autora y el libro que enamoró a miles de lectoras.Léete la vida con María Martínez. VIVIR ES UN VIAJE EXTRAORDINARIO SI ES MARÍA MARTÍNEZ QUIEN LO CUENTA. Un estuche elegante y delicado que contiene la nueva novela de la autora y una de sus obras más aclamadas. Disfruta de nuevo las historias de María Martínez y vuelvete a enamorar de su narrativa.
Hazard models with varying coefficients for multivariate failure time data
Creators: name: Zhou, Haibo
name: Fan, Jianqing
name: Zhou, Yong
name: Cai, Jianwen
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2007

description: Statistical estimation and inference for marginal hazard models with varying coefficients for multivariate failure time data are important subjects in survival analysis. A local pseudo-partial likelihood procedure is proposed for estimating the unknown coefficient functions. A weighted average estimator is also proposed in an attempt to improve the efficiency of the estimator. The consistency and asymptotic normality of the proposed estimators are established and standard error formulas for the estimated coefficients are derived and empirically tested. To reduce the computational burden of the maximum local pseudo-partial likelihood estimator, a simple and useful one-step estimator is proposed. Statistical properties of the one-step estimator are established and simulation studies are conducted to compare the performance of the one-step estimator to that of the maximum local pseudo-partial likelihood estimator. The results show that the one-step estimator can save computational cost without compromising performance both asymptotically and empirically and that an optimal weighted average estimator is more efficient than the maximum local pseudo-partial likelihood estimator. A data set from the Busselton Population Health Surveys is analyzed to illustrate our proposed methodology.
Evolutionary bagging for ensemble learning
Creators: name: Ngo, Giang
name: Beard, Rodney
name: Chandra, Rohitash
Publisher: name: arXiv
Year: 2022
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Ensemble learning has gained success in machine learning with major advantages over other learning methods. Bagging is a prominent ensemble learning method that creates subgroups of data, known as bags, that are trained by individual machine learning methods such as decision trees. Random forest is a prominent example of bagging with additional features in the learning process. Evolutionary algorithms have been prominent for optimisation problems and also been used for machine learning. Evolutionary algorithms are gradient-free methods that work with a population of candidate solutions that maintain diversity for creating new solutions. In conventional bagged ensemble learning, the bags are created once and the content, in terms of the training examples, are fixed over the learning process. In our paper, we propose evolutionary bagged ensemble learning, where we utilise evolutionary algorithms to evolve the content of the bags in order to iteratively enhance the ensemble by providing diversity in the bags. The results show that our evolutionary ensemble bagging method outperforms conventional ensemble methods (bagging and random forests) for several benchmark datasets under certain constraints. We find that evolutionary bagging can inherently sustain a diverse set of bags without reduction in performance accuracy.
Object oriented data analysis: Sets of trees
Creators: name: Wang, Haonan
name: Marron, J. S.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2007

description: Object oriented data analysis is the statistical analysis of populations of complex objects. In the special case of functional data analysis, these data objects are curves, where standard Euclidean approaches, such as principal component analysis, have been very successful. Recent developments in medical image analysis motivate the statistical analysis of populations of more complex data objects which are elements of mildly non-Euclidean spaces, such as Lie groups and symmetric spaces, or of strongly non-Euclidean spaces, such as spaces of tree-structured data objects. These new contexts for object oriented data analysis create several potentially large new interfaces between mathematics and statistics. This point is illustrated through the careful development of a novel mathematical framework for statistical analysis of populations of tree-structured objects.
Chiral triplet superconductivity on the graphene lattice
Creators: name: Faye, J. P. L.
name: Sahebsara, P.
name: Sénéchal, D.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Motivated by the possibility of superconductivity in doped graphene sheets, we investigate superconducting order in the extended Hubbard model on the two-dimensional graphene lattice using the variational cluster approximation (VCA) and the cellular dynamical mean-field theory (CDMFT) with an exact diagonalization solver at zero temperature. The nearest-neighbor interaction is treated using a mean-field decoupling between clusters. We compare different pairing symmetries, singlet and triplet, based on short-range pairing. VCA simulations show that the real (nonchiral), triplet $p$-wave symmetry is favored for small $V$, small on-site interaction $U$ or large doping, whereas the chiral combination $p+ip$ is favored for larger values of $V$, stronger on-site interaction $U$ or smaller doping. CDMFT simulations confirm the stability of the $p+ip$ solution, even at half-filling. Singlet superconductivity (extended $s$-wave or $d$-wave) is either absent or sub-dominant.
description: 10 pages, 8 figures
ESM appendices A1-A7 from Bird and bat species' global vulnerability to collision mortality with wind farms revealed through a trait-based assessment
Creators: name: Thaxter, Chris B.
name: Buchanan, Graeme M.
name: Carr, Jamie
name: Butchart, Stuart H. M.
name: Newbold, Tim
name: Green, Rhys E.
name: Tobias, Joseph A.
name: Foden, Wendy B.
name: O'Brien, Sue
name: Pearce-Higgins, James W.
Publisher: name: The Royal Society
Year: 2017
Subjects: subject: Ecology
subject: FOS: Biological sciences

description: Mitigation of anthropogenic climate change involves deployments of renewable energy worldwide, including wind farms, which can pose a significant collision risk to volant animals. Most studies into the collision risk of species with wind turbines, however, have taken place in industrialized countries. Potential effects for many locations and species therefore remain unclear. To redress this gap, we conducted a systematic literature review of recorded collisions of birds and bats with wind turbines within developed countries. We related collision rate to species-level traits and turbine characteristics to quantify the potential vulnerability of 9538 bird and 888 bat species globally. Avian collision rate was affected by migratory strategy, dispersal distance and habitat associations and bat collision rates were influenced by dispersal distance. For birds and bats, larger turbine capacity (megawatts) increased collision rates, however, deploying a smaller number of large turbines with greater energy output, reduced total collision risk per unit energy output, although bat mortality increased again with the largest turbines. Areas with high concentrations of vulnerable species were also identified, including migration corridors. Our results can therefore guide wind farm design and location to reduce the risk of large-scale animal mortality. This is the first quantitative global assessment of the relative collision vulnerability of species groups with wind turbines, providing valuable guidance for minimizing potentially serious negative impacts on biodiversity.
Perturbation selection and influence measures in local influence analysis
Creators: name: Zhang, Heping
name: Zhu, Hongtu
name: Lee, Sikyum
name: Ibrahim, Joseph G.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2007

description: Cook's [J. Roy. Statist. Soc. Ser. B 48 (1986) 133--169] local influence approach based on normal curvature is an important diagnostic tool for assessing local influence of minor perturbations to a statistical model. However, no rigorous approach has been developed to address two fundamental issues: the selection of an appropriate perturbation and the development of influence measures for objective functions at a point with a nonzero first derivative. The aim of this paper is to develop a differential--geometrical framework of a perturbation model (called the perturbation manifold) and utilize associated metric tensor and affine curvatures to resolve these issues. We will show that the metric tensor of the perturbation manifold provides important information about selecting an appropriate perturbation of a model. Moreover, we will introduce new influence measures that are applicable to objective functions at any point. Examples including linear regression models and linear mixed models are examined to demonstrate the effectiveness of using new influence measures for the identification of influential observations.
Contact homology and virtual fundamental cycles
Creators: name: Pardon, John
Publisher: name: arXiv
Year: 2015
Subjects: subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics
subject: 53D42, 57R17, 53D40, 53D35

description: We give a construction of contact homology in the sense of Eliashberg--Givental--Hofer. Specifically, we construct coherent virtual fundamental cycles on the relevant compactified moduli spaces of pseudo-holomorphic curves.
description: Final version to appear in JAMS, 102 pages, 10 figures
(3121) Helen Gertrude Carter
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
RÍO DE ALABANZA leer el libro pdf
Creators: name: Moser
Publisher: name: Zenodo
Year: 2024

description: RÍO DE ALABANZA de VICTOR MANUEL FERNANDEZ

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Ficha técnica

RÍO DE ALABANZA

VICTOR MANUEL FERNANDEZ

Idioma: CASTELLANO

Formatos: Pdf, ePub, MOBI, FB2

ISBN: 9788429331813

Editorial: SAL TERRAE

Año de edición: 2023

 

 

 

 

 

Descarga gratuita de la versión completa del bookworm. RÍO DE ALABANZA

 

Overview

Este libro ofrece una invitación a redescubrir la esencia de la alabanza en nuestra relación con el divino. A través de sus páginas, el Víctor Manuel Fernández nos lleva a comprender la relevancia de alabar, mostrándonos cómo puede liberarnos de angustias y preocupaciones, elevando nuestro espíritu. No es simplemente un libro sobre la teoría de la oración, sino una guía para conectarnos profundamente con Dios, para que nuestras almas se desborden en auténtica exaltación que resalte y agradezca las cualidades de Dios en nuestras vidas.
(3124) William Izon Chavasse
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
General frequentist properties of the posterior profile distribution
Creators: name: Cheng, Guang
name: Kosorok, Michael R.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2008

description: In this paper, inference for the parametric component of a semiparametric model based on sampling from the posterior profile distribution is thoroughly investigated from the frequentist viewpoint. The higher-order validity of the profile sampler obtained in Cheng and Kosorok [
Evolution of waves in liquid films on moving substrates
Creators: name: Ivanova, Tsvetelina
name: Pino, Fabio
name: Scheid, Benoit
name: Mendez, Miguel A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Accurate and computationally accessible models of liquid film flows allow for optimizing coating processes such as hot-dip galvanization and vertical slot-die coating. This paper extends the classic three-dimensional integral boundary layer (IBL) model for falling liquid films (FF) to account for a moving substrate (MS). We analyze the stability of the liquid films on vertically moving substrates in a linear and a nonlinear setting. In the linear analysis, we derive the dispersion relation and the temporal growth rates of an infinitesimal disturbance using normal modes and linearized governing equations. In the nonlinear analysis, we consider disturbances of finite size and numerically compute their evolution using the set of nonlinear equations in which surface tension has been removed. We present the region of (linear) stability of both FF and MS configurations, and we place the operating conditions of an industrial galvanizing line in these maps. A wide range of flow conditions was analyzed and shown to be stable according to linear and nonlinear stability analyses. Moreover, the nonlinear analysis, carried out in the absence of surface tension, reveals a nonlinear stabilizing mechanism for the interface dynamics of a liquid film dragged by an upward-moving substrate.
UV Insights into the Complex Populations of M 87 Globular Clusters
Creators: name: Bellini, A.
name: Renzini, A.
name: Anderson, J.
name: Bedin, L. R.
name: Piotto, G.
name: Soto, M.
name: Brown, T. M.
name: Milone, A. P.
name: Sohn, S. T.
name: Sweigart, A. V.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We have imaged with HST's WFC3/UVIS the central 2.7$\times$2.7 arcmin$^2$ region of the giant elliptical galaxy M 87, using the ultraviolet filter F275W. In combination with archival ACS/WFC data taken through the F606W and F814W filters, covering the same field, we have constructed integrated-light UV-optical colors and magnitudes for 1460 objects, most of which are believed to be globular clusters belonging to M 87. The purpose was to ascertain whether the multiple-populations syndrome, ubiquitous among Galactic globular clusters (GCs), exists also among the M 87 family of clusters. To achieve this goal, we sought those GCs with exceptionally blue UV-to-optical colors, because helium-enriched sub-populations produce a horizontal-branch morphology that is well populated at high effective temperature. For comparison, integrated, synthetic UV$-$optical and purely optical colors and magnitudes have been constructed for 45 Galactic GCs, starting from individual-star photometry obtained with the same instruments and the same filters. We identify a small group of M 87 clusters exhibiting a radial UV$-$optical color gradient, representing our best candidate GCs hosting multiple populations with extreme helium content. We also find that the central spatial distribution of the bluer GCs is flattened in a direction parallel to the jet, while the distribution of redder GCs is more spherical. We release to the astronomical community our photometric catalog in F275W, F606W and F814W bands and the high-quality image stacks in the same bands.
description: 20 pages (2 in Appendix), 15 figures (2 in low res), 2 tables, accepted for publication in ApJ
Higher order semiparametric frequentist inference with the profile sampler
Creators: name: Cheng, Guang
name: Kosorok, Michael R.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2008

description: We consider higher order frequentist inference for the parametric component of a semiparametric model based on sampling from the posterior profile distribution. The first order validity of this procedure established by Lee, Kosorok and Fine in [
Quantum critical spin-liquid-like behavior in S = 1/2 quasikagome lattice CeRh1-xPdxSn investigated using muon spin relaxation and neutron scattering
Creators: name: Tripathi, Rajesh
name: Adroja, D. T.
name: Ritter, C.
name: Sharma, Shivani
name: Yang, Chongli
name: Hillier, A. D.
name: Koza, M. M.
name: Demmel, F.
name: Sundaresan, A.
name: Langridge, S.
name: Higemoto, Wataru
name: Ito, Takashi U.
name: Strydom, A. M.
name: Stenning, G. B. G.
name: Bhattacharyya, A.
name: Keen, David
name: Walker, H. C.
name: Perry, R. S.
name: Pratt, Francis
name: Si, Qimiao
name: Takabatake, T.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present the results of muon spin relaxation ($μ$SR) and neutron scattering on the Ce-based quasikagome lattice CeRh$_{1-x}$Pd$_{x}$Sn ($x=0.1$ to 0.75). Our ZF-$μ$SR results reveal the absence of static long-range magnetic order down to 0.05~K in $x = 0.1$ single crystals. The weak temperature-dependent plateaus of the dynamic spin fluctuations below 0.2~K in ZF-$μ$SR together with its longitudinal-field (LF) dependence between 0 and 3~kG indicate the presence of dynamic spin fluctuations persisting even at $T$ = 0.05~K without static magnetic order. On the other hand, $C_{\text{4f}}$/$T$ increases as --log $T$ on cooling below 0.9~K, passes through a broad maximum at 0.13~K and slightly decreases on further cooling. The ac-susceptibility also exhibits a frequency independent broad peak at 0.16~K, which is prominent with an applied field $H$ along $c$-direction. We, therefore, argue that such a behavior for $x=0.1$ (namely, a plateau in spin relaxation rate ($λ$) below 0.2~K and a linear $T$ dependence in $C_{\text{4f}}$ below 0.13~K) can be attributed to a metallic spin-liquid (SL) ground state near the quantum critical point in the frustrated Kondo lattice. The LF-$μ$SR study suggests that the out of kagome plane spin fluctuations are responsible for the SL behavior. Low energy inelastic neutron scattering (INS) of $x$ = 0.1 reveals gapless magnetic excitations, which are also supported by the behavior of $C_{\text{4f}}$ proportional to $T^{1.1}$ down to 0.06~K.
description: 19 pages and 9 figures
HARRY POTTER Y LA PIEDRA FILOSOFAL (ED. ILUSTRADA BOLSILLO) EBOOK | J.K. ROWLING | Descargar libro PDF EPUB
Creators: name: Pinedo
Publisher: name: Zenodo
Year: 2024

description: HARRY POTTER Y LA PIEDRA FILOSOFAL (ED. ILUSTRADA BOLSILLO) de J.K. ROWLING

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HARRY POTTER Y LA PIEDRA FILOSOFAL (ED. ILUSTRADA BOLSILLO)

J.K. ROWLING

Número de páginas: 256

Idioma: CASTELLANO

Formatos: Pdf, ePub, MOBI, FB2

ISBN: 9788498389395

Editorial: S.A.) SALAMANDRA (PUBLICACIONES Y EDICIONES SALAMANDRA

Año de edición: 2019

 

 

 

 

 

Libros de texto en línea descarga gratuita pdf HARRY POTTER Y LA PIEDRA FILOSOFAL (ED. ILUSTRADA BOLSILLO) de J.K. ROWLING

 

Overview

 

La vida de Harry Potter cambia para siempre el día que cumple once años, cuando el gigante de ojos negros y brillantes Rubeus Hagrid le entrega una carta y le revela noticias asombrosas: Harry Potter no es un chico normal y corriente, es un mago. Está a punto de comenzar una aventura extraordinaria...

 

El prestigioso artista británico Jim Kay ha contribuido con su enorme talento en esta primera edición ilustrada del clásico de J. K. Rowling. Un libro maravilloso y cautivador, una obra de gran valor tanto para fans incondicionales como para nuevos lectores.

 

«Las ilustraciones de Jim Kay me emocionaron profundamente. Me encanta su interpretación del mundo de Harry Potter, y para mí es un verdadero honor que haya aportado su talento a esta nueva edición.» J. K. Rowling
Fast operator splitting methods for obstacle problems
Creators: name: Liu, Hao
name: Wang, Dong
Publisher: name: arXiv
Year: 2022
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65M06, 65N06, 35J60

description: The obstacle problem is a class of free boundary problems which finds applications in many disciplines such as porous media, financial mathematics and optimal control. In this paper, we propose two operator-splitting methods to solve the linear and nonlinear obstacle problems. The proposed methods have three ingredients: (i) Utilize an indicator function to formularize the constrained problem as an unconstrained problem, and associate it to an initial value problem. The obstacle problem is then converted to solving for the steady state solution of an initial value problem. (ii) An operator-splitting strategy to time discretize the initial value problem. After splitting, a heat equation with obstacles is solved and other subproblems either have explicit solutions or can be solved efficiently. (iii) A new constrained alternating direction explicit method, a fully explicit method, to solve heat equations with obstacles. The proposed methods are easy to implement, do not require to solve any linear systems and are more efficient than existing numerical methods while keeping similar accuracy. Extensions of the proposed methods to related free boundary problems are also discussed.
PCA consistency in high dimension, low sample size context
Creators: name: Marron, J. S.
name: Jung, Sungkyu
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2009

description: Principal Component Analysis (PCA) is an important tool of dimension reduction especially when the dimension (or the number of variables) is very high. Asymptotic studies where the sample size is fixed, and the dimension grows [i.e., High Dimension, Low Sample Size (HDLSS)] are becoming increasingly relevant. We investigate the asymptotic behavior of the Principal Component (PC) directions. HDLSS asymptotics are used to study consistency, strong inconsistency and subspace consistency. We show that if the first few eigenvalues of a population covariance matrix are large enough compared to the others, then the corresponding estimated PC directions are consistent or converge to the appropriate subspace (subspace consistency) and most other PC directions are strongly inconsistent. Broad sets of sufficient conditions for each of these cases are specified and the main theorem gives a catalogue of possible combinations. In preparation for these results, we show that the geometric representation of HDLSS data holds under general conditions, which includes a
Dispersive landslide
Creators: name: Pudasaini, Shiva P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Geophysics (physics.geo-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Considering the non-hydrostatic mass flow model (Pudasaini, 2022), here, we derive a novel dispersive wave equation for landslide. The new dispersive wave for landslide recovers the classical dispersive water waves as a special case. We show that the frequency dispersion relation for landslide is inherently different than the classical frequency dispersion for water waves. The wave frequency with dispersion increases non-linearly as a function of the wave number. For dispersive landslide, the wave frequency without dispersion appears to heavily overestimate the dispersive wave frequency for higher wave number. Due to the dispersion term emerging from the non-hydrostatic contribution for landslide, the phase velocity becomes a function of the wave number. This gives rise to the group velocity that is significantly different from the phase velocity, characterizing the dispersive mass flow. The dispersive phase velocity and group velocity decrease non-linearly with the wave number. Yet, the group velocity is substantially lower than the phase velocity. We analytically derive a dispersion number as the ratio between the phase velocity and the group velocity, which measures the deviation of the group velocity from the phase velocity, provides a dynamic scaling between them and summarizes the overall effect of dispersion in the mass flow. The dispersion number for landslide increases rapidly with the wave number, which is in contrast to the dispersion in water waves. With the definition of the effective dispersive lateral stress, we prove the existence of an anti-restoring force in landslide. We reveal the fact that due to the anti-restoring force, landslides are more dispersive than the piano strings. So, the wave dispersion in landslide is fundamentally different than the wave dispersion in the piano string. Our model constitutes a foundation for the wave phenomenon in dispersive mass flows.
Continuous variable entanglement on a chip
Creators: name: Masada, Genta
name: Miyata, Kazunori
name: Politi, Alberto
name: Hashimoto, Toshikazu
name: O'Brien, Jeremy L.
name: Furusawa, Akira
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Encoding quantum information in continuous variables (CV)---as the quadrature of electromagnetic fields---is a powerful approach to quantum information science and technology. CV entanglement---light beams in Einstein-Podolsky-Rosen (EPR) states---is a key resource for quantum information protocols; and enables hybridisation between CV and single photon discrete variable (DV) qubit systems. However, CV systems are currently limited by their implementation in free-space optical networks: increased complexity, low loss, high-precision alignment and stability, as well as hybridisation, demand an alternative approach. Here we show an integrated photonic implementation of the key capabilities for CV quantum technologies---generation and characterisation of EPR beams in a photonic chip. Combined with integrated squeezing and non-Gaussian operation, these results open the way to universal quantum information processing with light.
$Z_3$ Scalar Dark Matter with Strong Positron Fluxes
Creators: name: Sáez, Bastián Díaz
name: Ghorbani, Karim
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We explore a class of simplified extensions to the Standard Model containing a complex singlet scalar as a dark matter candidate accompanied by a vector-like lepton as a mediator, both charged under a new $Z_3$ symmetry. In its simplest form, the new physics couples only to right-handed electrons, and the model is able to accommodate the correct dark matter relic abundance around the electroweak scale up to several TeV evading the strongest constraints from perturbativity, collider and dark matter searches. Furthermore, the model is capable to enhance naturally positron fluxes by several orders of magnitude presenting a box-shape spectra. This framework opens up a lot of phenomenological possibilities depending on the quantum charge assignments of the new fields.
Periodic solution and asymptotic stability for the magnetohydrodynamic equations with inhomogeneous boundary condition
Creators: name: Kondrashuk, Igor
name: Notte-Cuello, Eduardo A.
name: Poblete-Cantellano, Mariano
name: Rojas-Medar, Marko A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 35Q30, 35B10, 76W05

description: We show, using the spectral Galerkin method together with compactness arguments, existence and uniqueness of the periodic strong solutions for the magnetohydrodynamics's type equations with inhomogeneous boundary conditions. Also, we study the asymptotic stability for time periodic solution for this system. In particular, when the magnetic field h(x,t) is zero, we obtain existence, uniqueness and asymptotic behavior of the strong solutions to the Navier-Stokes equations with inhomogeneous boundary conditions.
description: 29 pages, revised version, title is extended, study of asymptotic stability is added
(3122) Claude Lionel Chavasse
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
Inertial and dimensional effects on the instability of a thin film
Creators: name: González, A. G.
name: Diez, J. A.
name: Sellier, M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We consider here the effects of inertia on the instability of a flat liquid film under the effects of capillary and intermolecular forces (van der Waals interaction). Firstly, we perform the linear stability analysis within the long wave approximation, which shows that the inclusion of inertia does not produce new regions of instability other than the one previously known from the usual lubrication case. The wavelength, $λ_m$, corresponding to he maximum growth, $ω_m$, and the critical (marginal) wavelength do not change at all. The most affected feature of the instability under an increase of the Laplace number is the noticeable decrease of the growth rates of the unstable modes. In order to put in evidence the effects of the bidimensional aspects of the flow (neglected in the long wave approximation), we also calculate the dispersion relation of the instability from the linearized version of the complete Navier-Stokes (N-S) equation. Unlike the long wave approximation, the bidimensional model shows that $λ_m$ can vary significantly with inertia when the aspect ratio of the film is not sufficiently small. We also perform numerical simulations of the nonlinear N-S equations and analyze to which extent the linear predictions can be applied depending on both the amount of inertia involved and the aspect ratio of the film.
Development of the photo-diode subsystem for the HERD calorimeter double-readout
Creators: name: Adriani, O.
name: Antonelli, M.
name: Basti, A.
name: Berti, E.
name: Betti, P.
name: Bigongiari, G.
name: Bonechi, L.
name: Bongi, M.
name: Bonvicini, V.
name: Bottai, S.
name: Brogi, P.
name: Castellini, G.
name: Checchia, C.
name: Casaus, J.
name: Cui, X.
name: Dong, Y.
name: D'Alessandro, R.
name: Detti, S.
name: Giovacchini, F.
name: Finetti, N.
name: Maestro, P.
name: Marrocchesi, P. S.
name: Liu, X.
name: Marin, J.
name: Martinez, G.
name: Mori, N.
name: Pacini, L.
name: Papini, P.
name: Pizzolotto, C.
name: Ricciarini, S.
name: Spillantini, P.
name: Starodubtsev, O.
name: Stiaccini, L.
name: Tang, Z.
name: Tiberio, A.
name: Vannuccini, E.
name: Velasco, M.
name: Wang, R.
name: Wang, Z.
name: Xu, M.
name: Zampa, G.
name: Zampa, N.
name: Zhang, L.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The measurement of cosmic-ray individual spectra provides unique information regarding the origin and propagation of astro-particles. Due to the limited acceptance of current space experiments, protons and nuclei around the "knee" region ($\sim1\ PeV$) can only be observed by ground based experiments. Thanks to an innovative design, the High Energy cosmic-Radiation Detection (HERD) facility will allow direct observation up to this energy region: the instrument is mainly based on a 3D segmented, isotropic and homogeneous calorimeter which properly measures the energy of particles coming from each direction and it will be made of about 7500 LYSO cubic crystals. The read-out of the scintillation light is done with two independent systems: the first one based on wave-length shifting fibers coupled to Intensified scientific CMOS cameras, the second one is made of two photo-diodes with different active areas connected to a custom front-end electronics. This photo-diode system is designed to achieve a huge dynamic range, larger than $10^7$, while having a small power consumption, few mW per channel. Thanks to a good signal-to-noise ratio, the capability of a proper calibration, by using signals of both non-interacting and showering particles, is also guaranteed. In this paper, the current design and the performance obtained by several tests of the photo-diode read-out system are discussed.
(3116) Harriet Agnes Traill
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.