cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Normality and Montel's Theorem
Creators: name: Datt, Gopal
name: Kumar, Sanjay
Publisher: name: arXiv
Year: 2019
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 30D45

description: In this article, we prove a normality criterion for a family of meromorphic functions having zeros with some multiplicity which involves sharing of a holomorphic function by the members of the family. Our result generalizes Montel's normality test in a certain sense.
Magellanic Cloud X-ray Sources: III. Completion of a ROSAT Survey
Creators: name: Schmidtke, P. C.
name: Cowley, A. P.
name: Crane, J. D.
name: Taylor, V. A.
name: McGrath, T. K.
name: Hutchings, J. B.
name: Crampton, David
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This paper concludes a series of three papers presenting ROSAT High-Resolution Imager (HRI) observations of unidentified Einstein and serendipitous ROSAT X-ray sources in the direction of the Magellanic Clouds. Accurate positions and fluxes have been measured for these sources. Optical photometry and spectroscopy were obtained to search for identifications in order to determine the physical nature of these sources. The present paper includes new data for 24 objects; identifications are given or confirmed for 30 sources. For six sources optical finding charts showing the X-ray positions are provided. The results from this program are summarized, showing the populations of luminous X-ray sources in the Magellanic Clouds are quite different from those in the Galaxy.
description: 28 pages, 2 figures; to appear in Astronomical Journal
Physical descriptor for the Gibbs energy of inorganic crystalline solids and temperature-dependent materials chemistry
Creators: name: Bartel, Christopher J.
name: Millican, Samantha L.
name: Deml, Ann M.
name: Rumptz, John R.
name: Tumas, William
name: Weimer, Alan W.
name: Lany, Stephan
name: Stevanović, Vladan
name: Musgrave, Charles B.
name: Holder, Aaron M.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The Gibbs energy, G, determines the equilibrium conditions of chemical reactions and materials stability. Despite this fundamental and ubiquitous role, G has been tabulated for only a small fraction of known inorganic compounds, impeding a comprehensive perspective on the effects of temperature and composition on materials stability and synthesizability. Here, we use the SISSO (sure independence screening and sparsifying operator) approach to identify a simple and accurate descriptor to predict G for stoichiometric inorganic compounds with ~50 meV/atom (~1 kcal/mol) resolution, and with minimal computational cost, for temperatures ranging from 300-1800 K. We then apply this descriptor to ~30,000 known materials curated from the Inorganic Crystal Structure Database (ICSD). Using the resulting predicted thermochemical data, we generate thousands of temperature-dependent phase diagrams to provide insights into the effects of temperature and composition on materials synthesizability and stability and to establish the temperature-dependent scale of metastability for inorganic compounds.
Mathematical problems on fluid flow over structured surfaces
Creators: name: Kirk, Toby Lawrence
Publisher: name: Imperial College London
Year: 2017

description: In this thesis we study a range of mathematical problems on liquid flow over surfaces that are structured, with an emphasis on modern superhydrophobic surfaces exhibiting apparent slip. One challenge in analysing the flow over such surfaces is to understand the relationship between the particular design and properties of a surface on the microscale, and the effects on the liquid flow on the macroscale. The microscale structure is then replaced with a Navier slip condition and apparent slip length characterising the apparent slippage at the surface. Another challenge is to determine the impact of this model on different flows, and how it can be used to influence dynamics. We consider two distinct important scenarios of substrate structuring in this thesis. In part I, we study gravity-driven film flow down an incline with an emphasis on heterogeneous superhydrophobic coatings and their passive influence on the interfacial dynamics and stability. The structuring varies in space, and the apparent slip length is prescribed. A set of long-wave model equations are derived, and the consequences of several stick-slip patternings (some regions of no-slip and some of slip) are analysed. In part II, we consider pressure-driven flow in microchannels where, due to the size of the channels, the superhydrophobic structuring has to be resolved in detail, and the apparent slip length is not prescribed but found from the solution, and it is used to characterise the slippage of a given structuring. Emphasis is placed on the case of a periodic array of parallel ridges and their application to direct liquid cooling. The slip length and convective heat transfer quantities depend greatly on the particular geometry of the channel and the structuring, and we quantify their dependence on several geometrical and thermophysical (such as Marangoni or thermocapillary) effects using asymptotic theory.
Meromorphically normal families and a meromorphic Montel-Carathéodory theorem
Creators: name: Datt, Gopal
Publisher: name: arXiv
Year: 2018
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 32A19, 32H04, 32Q45

description: In this paper, we present various sufficient conditions for a family of meromorphic mappings on a domain $D\subset \mathbb{C}^m$ into $\mathbb{P}^n$ to be meromorphically normal. Meromorphic normality is a notion of sequential compactness in the meromorphic category introduced by Fujimoto. We give a general condition for meromorphic normality that is influenced by Fujimoto's work. The approach to proving this result allows us to establish meromorphic analogues of several recent results on normal families of $\mathbb{P}^n$-valued holomorphic mappings. We also establish a meromorphic version of the Montel-Carathéodory theorem.
description: 13 pages
O Modus Operandi do Escritor: Desconstrução do Ato Criador Poético a Partir da Análise do Ensaio a Filosofia da Composição de Edgar Allan Poe
Creators: name: Correia, Miguel
name: Marques, Matilde
Publisher: name: E- Revista de Estudos Interculturais
Year: 2021

description: A complexa teoria de Edgar Allan Poe sobre o processo de criação literária é pautada por dois pontos essenciais: em primeiro lugar, uma obra literária de arte deve criar uma unidade de efeito no leitor, designada por “efeito único pré-concebido”, para ser bem-sucedida; em segundo lugar, a produção deste efeito não deve ser relacionada com o domínio da inspiração, mas com um processo racional empreendido pelo escritor, que determina os pormenores estilísticos e temáticos da obra, o que enfatiza a simbiose do ato criador poético com as faculdades mentais do criador em oposição à estética romântica que o encarou como um fenómeno puramente intuitivo (Silva: 1967). Na poesia, este efeito desperta a perceção de beleza, constituindo "a província do poema " (Poe 2016:38), conceito que o autor associou com a melancolia, estranhamento e perda; em prosa, este efeito constitui a revelação de uma verdade, tal como se verifica nas obras artísticos que evocam o terror, a paixão ou o horror. Assim, tendo como ponto de partida A Filosofia da Composição (1846), ilustramos o modus operandi do escritor, ou seja, a sua forma metódica de operar na criação literária, que Poe descreve "com a precisão e sequência rígida de um problema matemático" (ibidem: 36), utilizando como exemplo as etapas envolvidas na elaboração do poema "The Raven". De modo a explicitar a teoria subjacente ao processo de criação artística no presente ensaio estudamos, igualmente, a extensão, o método e a unidade de efeito, articulando distintas perspetivas relevantes nesta área dos estudos literários.
description: E- Revista de Estudos Interculturais , Vol. 2 N.º 7 (2019)
Stanley symmetric functions for signed involutions
Creators: name: Marberg, Eric
name: Pawlowski, Brendan
Publisher: name: arXiv
Year: 2018
Subjects: subject: Combinatorics (math.CO)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: An involution in a Coxeter group has an associated set of involution words, a variation on reduced words. These words are saturated chains in a partial order first considered by Richardson and Springer in their study of symmetric varieties. In the symmetric group, involution words can be enumerated in terms of tableaux using appropriate analogues of the symmetric functions introduced by Stanley to accomplish the same task for reduced words. We adapt this approach to the group of signed permutations. We show that involution words for the longest element in the Coxeter group $C_n$ are in bijection with reduced words for the longest element in $A_n = S_{n+1}$, which are known to be in bijection with standard tableaux of shape $(n, n-1, \ldots, 2, 1)$.
description: 26 pages, 3 figures; v2: fixed several typos; v3: some minor corrections, a few added remarks, final version
Deep Imaging of AXJ2019+112: The Luminosity of a ``Dark Cluster''
Creators: name: Benitez, Narciso
name: Broadhurst, Tom
name: Rosati, Piero
name: Courbin, Fred
name: Squires, Gordon
name: Lidman, Chris
name: Magain, Pierre
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We detect a distant cluster of galaxies centered on the QSO lens and luminous X-ray source AXJ2019+112, a.k.a. ``The Dark Cluster'' (Hattori et al 1997). Using deep V,I Keck images and wide-field K_s imaging from the NTT, a tight red sequence of galaxies is identified within a radius of 0.2 h^{-1} Mpc of the known z=1.01 elliptical lensing galaxy. The sequence, which includes the central elliptical galaxy, has a slope in good agreement with the model predictions of Kodama et al (1998) for z~1. We estimate the integrated rest-frame luminosity of the cluster to be L_V > 3.2 x 10^{11}h^{-2}L_{\sun} (after accounting for significant extinction at the low latitude of this field), more than an order of magnitude higher than previous estimates. The central region of the cluster is deconvolved using the technique of Magain, Courbin & Sohy (1998), revealing a thick central arc coincident with an extended radio source. All the observed lensing features are readily explained by differential magnification of a radio loud AGN by a shallow elliptical potential. The QSO must lie just outside the diamond caustic, producing two images, and the arc is a highly magnified image formed from a region close to the center of the host galaxy, projecting inside the caustic. The mass--to--light ratio within an aperture of 0.4 h ^{-1} Mpc is M_x/L_V= 224^{+112}_{-78}h(M/L_V)_{\sun}, using the X-ray temperature. The strong lens model yields a compatible value, M/L_V= 372^{+94}_{-94}h(M/L_V)_{\sun}, whereas an independent weak lensing analysis sets an upper limit of M/L_V <520 h(M/L_V)_{\sun}, typical of massive clusters.
description: AAS Latex format, 24 pages, 9 figures. Fig 1a,b available at http://astro.berkeley.edu/~benitezn/cluster.html . Submitted to ApJ on August 15th
Additional file 4: of Do hotspots fuel malaria transmission: a village-scale spatio-temporal analysis of a 2-year cohort study in The Gambia
Creators: name: Stresman, Gillian
name: Mwesigwa, Julia
name: Achan, Jane
name: Giorgi, Emanuele
name: Worwui, Archibald
name: Jawara, Musa
name: Tanna, Gian Di
name: Bousema, Teun
name: Geertruyden, Jean-Pierre Van
name: Drakeley, Chris
name: DâAlessandro, Umberto
Publisher: name: figshare
Year: 2018
Subjects: subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Evolutionary Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: Heat maps for all villages, removing households with no infections and individuals with 5 or fewer time points sampled. Each panel represents a household, and each row within the panel represents an individual residing in that household. Individuals are ordered by increasing age with the youngest on top within each panel. Each column within each grid represents a sampling month starting in June 2013 through December 2014. (DOCX 4496 kb)
Transverse thermopower in Dirac and Weyl semimetals
Creators: name: Sharma, Gargee
name: Tewari, Sumanta
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Dirac semimetals (DSM) and Weyl semimetal (WSM) fall under the generic class of three-dimensional solids, which follow relativistic energy-momentum relation $ε_\mathbf{k}= \hbar v_F |\mathbf{k}|$ at low energies. Such a linear dispersion when regularized on a lattice can lead to remarkable properties such as the anomalous Hall effect, presence of Fermi surface arcs, positive longitudinal magnetoconductance, and dynamic chiral magnetic effect. The last two properties arise due to the manifestation of chiral anomaly in these semimetals, which refers to the non-conservation of chiral charge in the presence of electromagnetic gauge fields. Here, we propose the planar Nernst effect, or transverse thermopower, as another consequence of chiral anomaly, which should occur in both Dirac and Weyl semimetals. We analytically calculate the planar Nernst coefficient for DSMs (type-I and type-II) and also WSMs (type-I and type-II), using a quasi-classical Boltzmann formalism. The planar Nernst effect manifests in a configuration when the applied temperature gradient, magnetic field, and the measured voltage are all co-planar, and is of distinct origin when compared to the anomalous and conventional Nernst effects. Our findings, specifically a 3D map of the planar Nernst coefficient in type-I Dirac semimetals (Na$_3$Bi, Cd$_3$As$_2$ etc) and type-II DSM (PdTe$_2$, VAI3 etc), can be verified experimentally by an in-situ 3D double-axis rotation extracting the full $4π$ solid angular dependence of the Nernst coefficient.
description: 7 pages, 4 figures. PRB accepted version
3D full waveform inversion of narrow-azimuth towed-streamer seismic data
Creators: name: Ashley, Jack
Publisher: name: Imperial College London
Year: 2018

description: Full waveform inversion (FWI) is a powerful seismic technique, which aims to produce high resolution, high fidelity quantitative models of the subsurface. Most of the successful FWI applications have been limited to data collected using wide-angle ocean bottom cables (OBCs). The abundance of refracted arrivals help build more accurate low-frequency information into the model. However a large majority of seismic data has been collected using narrow-azimuth towed-streamers (NATS), which often lack these important arrivals. Successful applications of FWI also typically rely on accurate start models obtained from computationally intensive and time-consuming techniques. Therefore being able to successfully and repeatedly apply FWI to a wider range of datasets without the need for accurate start models is of great importance. The effect of acquisition geometry and the accuracy of the start model was investigated on a set of 3D synthetic datasets using acoustic isotropic FWI. It demonstrated that, for simple synthetic experiments with the same physics in the inversion as in the dataset, the model accuracy and acquisition geometry has minimal effect on the success of the inversion. However results from the inversions performed on datasets generated using more realistic physics demonstrated that datasets with longer offsets and wider azimuths did produce more accurate results but reflectors were misplaced in depth. FWI was also successfully applied to a challenging 3D NATS seismic dataset using a basic start model. An efficient strategy for improving the kinematic match of the water bottom arrival by adapting the density model as a proxy for correctly positioning the depth of the water bottom was demonstrated. It was able to improve the kinematic match of the water bottom arrivals which resulted in improved inversions with a better recovered velocity model. The models also produced synthetics with a better match to the observed data. Various strategies were then investigated to invert for both velocity and anisotropy. Local inversion methods for both anisotropy and velocity were first explored, then a combined method of global inversion for the initial anisotropy model and local inversion for the velocity model was demonstrated. Adding anisotropy into the inversion gave a better match of the velocities at the well location than the purely isotropic inversions and more correctly positioned the reflectors in depth. Overall the study shows that FWI can still produce promising results on datasets generated without optimal acquisition geometries, with limited early-arriving transmitted energy, and without a mature start model.
Consequences of feedback from early supernovae for disk assembly
Creators: name: Natarajan, Priyamvada
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this letter we examine the role of the first supernovae in proto-galaxies, their role in feedback and the consequences for disk assembly. Extending the picture proposed by Dekel & Silk (1986), we argue that energetic supernovae winds can expel baryons from all proto-galaxies with varying degrees of efficiency. The fraction of baryons retained and hence available to assemble into the baryonic disk is therefore, a function of the central velocity dispersion of the halo. Such a coupling of the baryonic component to the dark halo leads to the following interesting consequence, a prediction for a weak scaling of the zero-point of the Tully-Fisher relation or alternatively, the mass-to-light ratio with the central velocity dispersion of the halo. On applying to the case of the Milky Way halo, this feedback mechanism implies: (i) that the Milky Way halo lost approximately 10% of its original gas content; (ii) a range in the inferred redshift of formation $z_f$, and the local baryon fraction $f_b$ for the Milky Way that depends on the initial spin parameter of the halo. We find that for a low spin halo - $z_f < 1$, $f_b \sim 2%$; for a median spin halo - $z_f \sim 1 - 2.5$, $f_b \sim 5%$; and for a high spin halo - $z_f \sim 4 - 8$, $f_b \sim 20%$. The observationally determined ages for the oldest disk stars in the Milky Way seem to rule out a low value for the spin parameter. Given the shape of the spin distribution of halos obtained in N-body simulations, while a high value of the spin parameter is not very probable, it is interesting to note that if this is indeed the case for the Milky Way halo, then feedback processes can cause the local baryon fraction to differ significantly from the universal value.
description: 5 pages, LaTeX, 1 figure, accepted for publiction in ApJ Letters
Additional file 10: of Longitudinal associations of in utero and early life near-roadway air pollution with trajectories of childhood body mass index
Creators: name: Kim, Jeniffer
name: Alderete, Tanya
name: Zhanghua Chen
name: Lurmann, Fred
name: Rappaport, Ed
name: Habre, Rima
name: Kiros Berhane
name: Gilliland, Frank
Publisher: name: figshare
Year: 2018
Subjects: subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Developmental Biology
subject: Science Policy
subject: Computational Biology

description: Effects of childhood, near-road non-freeway NOx exposure on 4-year childhood BMI trajectories for children enrolled in the Childrenâ s Health Study. (DOCX 14 kb)
title: 03_0702
Creators: name: Wesley Baldwin, John
name: Baldwin, John W.
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2018
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: L'ensemble de ces notes ont été crée par John Baldwin lors d'une de ses premières périodes de résidence à Paris. Ces documents comprennent tous les magistri qu’il avait pu rencontrer dans ses sources. Aux XIIème et XIIIème siècles, les universités n'existant pas encore, le titre de magister s'il évoque certainement une compétence n'est pas rattaché de façon systématique au passage par les écoles. De surcroît, les magistris sont le plus souvent désignés par leur seul prénom. La lecture de ces données est donc difficile et suppose un long travail pour tenter d'identifier un individu auquel on pourrait rattacher plusieurs mentions. John Baldwin avait donc renoncé à utiliser ces données pour donner un prolongement à sa magnifique étude sur les gradués d'université et leur emploi par les Capétiens et les Plantagenêts. Néanmoins, il a conservé ces données et elles sont potentiellement très utile dans le cadre de Studium, comme le sont toutes les mentions dans les volumes des Fasti Ecclesiae Gallicanae de chanoines portant ce titre de magister sans autres précisions. L'ampleur des dépouillements rend ces données très utiles et nous devons une grande reconnaissance à John Baldwin pour avoir pris la peine de faire photocopier ses fiches et de nous les avoir transmises amicalement.
Les données ainsi que les images des fiches sont accessibles sur le site Internet à l'adresse suivante : http://studium-baldwin.lamop.fr/.
Les transcriptions des fiches ont été effectuées par des étudiants de Paris 1 Panthéon - Sorbonne mais elles n'ont pas été corrigées par la suite.
description: Relation: https://lamop.hypotheses.org/
Understanding photocatalysts: from electronic properties to solar fuels
Creators: name: Medeiros Dias, Elton
Publisher: name: Imperial College London
Year: 2018

description: Solar fuels such as H2 or those based on the photo-reduction of CO2 , are deemed as one of the strongest alternatives for a sustainable future. Photocatalysts are a class of materials that can potentially utilise solar light in order to generate solar fuels, but their performance still requires further research in order to turn them into economically and technically viable solutions. Currently, some of the major challenges faced by photocatalysts are in relation to their optoelectronic properties, such as poor light harvesting or fast charge recombination. Although much effort has been made on improving the efficiency of photocatalysts, there are still some fundamental knowledge gaps, specifically when characterising photocatalysts for their optoelectronic properties. The conclusions drawn from some characterisation techniques are often not verified against the assumptions that were used to interpret the data in the first place. In this work, UiO-66(Zr) and isoreticular variants of it (–NH2 , Br and –NO2 ), had their optoelectronic properties characterised using an array of techniques, creating a comparison framework. It was discovered that XPS is a reliable technique for the determination of the electronic band structure of photocatalysts, while the commonly used electrochemical Mott-Schottky technique cannot be applied for UiO-66(Zr) and its variants. XPS technique was then applied to characterise g-C3N4 that had been thermally treated with the goal of improving its optoelectronic properties. Thermal treatment resulted in increased performance in both H2 evolution and CO2 photo-reduction, with the characterisation results suggesting that the thermal treatment led to the formation of electronic trap states that delayed charge recombination and consequently improved the photocatalytic performance. Finally, with the knowledge obtained from the UiO-66(Zr) and its variants and g-C3N4 studies, novel composites of g-C3N4/UiO-66(Zr) were synthesised in order to explore the synergistic effects of electronic heterojunctions. These composites had H2 evolution rates 3.5 times greater than those of g-C3N4 and about 55 times greater than those of UiO-66(Zr), demonstrating the synergetic effects of heterojunctions. This research enhances our understanding of how photocatalysts’ optoelectronic properties have an impact on their performance and represents progress in turning these materials into reliable solutions for solar fuels production.
A Visita Da Velha Senhora do Autor Suíço Friedrich Dürrenmatt: Uma História de Vingança, Justiça e Culpa
Creators: name: Moura, Micaela Da Silva Marques
Publisher: name: E- Revista de Estudos Interculturais
Year: 2021

description: Neste artigo será feita uma apresentação da tragicomédia A Visita da Velha Senhora do autor suíço Friedrich Dürrenmatt. Esta peça de teatro foi representada inúmeras vezes um pouco por todo o mundo e também em Portugal e mantém-se atual até aos nossos dias. As razões para as constantes representações encontram-se no género literário escolhido por este autor helvético e também na sua conceção de literatura. O enredo é muito simples e os temas abordados - a vingança, a justiça e a culpa – fazem parte da vida dos seres humanos.
description: E- Revista de Estudos Interculturais , Vol. 2 N.º 7 (2019)
Predicting Effective Control Parameters for Differential Evolution using Cluster Analysis of Objective Function Features
Creators: name: Walton, Sean P.
name: Brown, M. Rowan
Publisher: name: arXiv
Year: 2018
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: A methodology is introduced which uses three simple objective function features to predict effective control parameters for differential evolution. This is achieved using cluster analysis techniques to classify objective functions using these features. Information on prior performance of various control parameters for each classification is then used to determine which control parameters to use in future optimisations. Our approach is compared to state-of-the-art adaptive and non-adaptive techniques. Two accepted bench mark suites are used to compare performance and in all cases we show that the improvement resulting from our approach is statistically significant. The majority of the computational effort of this methodology is performed off-line, however even when taking into account the additional on-line cost our approach outperforms other adaptive techniques. We also investigate the key tuning parameters of our methodology, such as number of clusters, which further support the finding that the simple features selected are predictors of effective control parameters. The findings presented in this paper are significant because they show that simple to calculate features of objective functions can help to select control parameters for optimisation algorithms. This can have an immediate positive impact on the application of these optimisation algorithms on real world problems, where it is often difficult to select effective control parameters.
description: Cite this article as: Walton, S.P. & Brown, M.R. J Heuristics (2019). https://doi.org/10.1007/s10732-019-09419-8
The Accretion of Brown Dwarfs and Planets by Giant Stars -- I. AGB Stars
Creators: name: Siess, Lionel
name: Livio, Mario
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the response of the structure of an asymptotic giant branch (AGB) star to the accretion of a brown dwarf or planet in its interior. In particular, we examine the case in which the brown dwarf spirals-in, and the accreted matter is deposited at the base of the convective envelope and in the thin radiative shell surrounding the hydrogen burning shell. In our spherically symmetric simulations, we explore the effects of different accretion rates and we follow two scenarios in which the amounts of injected mass are equal to $\sim 0.01$ and $\sim 0.1 M_\odot$. The calculations show that for high accretion rates ($\dot M_{acc} = 10^{-4} M_\odot yr^{-1}$), the considerable release of accretion energy produces a substantial expansion of the star and gives rise to hot bottom burning at the base of the convective envelope. For somewhat lower accretion rates ($\dot M_{acc} = 10^{-5} M_\odot yr^{-1}$), the accretion luminosity represents only a small fraction of the stellar luminosity, and as a result of the increase in mass (and concomitantly of the gravitational force), the star contracts. Our simulations also indicate that the triggering of thermal pulses is delayed (accelerated) if mass is injected at a slower (faster) rate. We analyze the effects of this accretion process on the surface chemical abundances and show that chemical modifications are mainly the result of deposition of fresh material rather than of active nucleosynthesis. Finally, we suggest that the accretion of brown dwarfs and planets can induce the ejection of shells around giant stars, increase their surface lithium abundance and lead to significant spin-up. The combination of these features is frequently observed among G and K giant stars.
description: 11 pages, 9 Postscript figures, to be published in the MNRAS. see also http://www-laog.obs.ujf-grenoble.fr/~siess
Nonlinear polaritons in monolayer semiconductor coupled to optical bound states in the continuum
Creators: name: Kravtsov, V.
name: Khestanova, E.
name: Benimetskiy, F. A.
name: Ivanova, T.
name: Samusev, A. K.
name: Sinev, I. S.
name: Pidgayko, D.
name: Mozharov, A. M.
name: Mukhin, I. S.
name: Lozhkin, M. S.
name: Kapitonov, Y. V.
name: Brichkin, A. S.
name: Kulakovskii, V. D.
name: Shelykh, I. A.
name: Tartakovskii, A. I.
name: Walker, P. M.
name: Skolnick, M. S.
name: Krizhanovskii, D. N.
name: Iorsh, I. V.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Optical bound states in the continuum (BICs) provide a way to engineer very narrow resonances in photonic crystals. The extended interaction time in such systems is particularly promising for enhancement of nonlinear optical processes and development of the next generation of active optical devices. However, the achievable interaction strength is limited by the purely photonic character of optical BICs. Here, we mix optical BIC in a photonic crystal slab with excitons in atomically thin semiconductor MoSe$_2$ to form nonlinear exciton-polaritons with a Rabi splitting of 27~meV, exhibiting large interaction-induced spectral blueshifts. The asymptotic BIC-like suppression of polariton radiation into far-field towards the BIC wavevector, in combination with effective reduction of excitonic disorder through motional narrowing, results in small polariton linewidths below 3~meV. Together with strongly wavevector-dependent Q-factor, this provides for enhancement and control of polariton--polariton interactions and resulting nonlinear optical effects, paving the way towards tunable BIC-based polaritonic devices for sensing, lasing, and nonlinear optics.
Characterisation of fibre hybrid thermosetting composites for automotive applications
Creators: name: Katafiasz, Tomas
Publisher: name: Imperial College London
Year: 2018

description: The objective of the research presented in this PhD thesis is to improve the understanding of the failure modes and numerical modelling techniques associated with both interlayer and intralayer fibre hybrid composites and their monolithic constituent composite counterparts, with the overall objective of using the fibre hybrid composites for automotive components. The materials tested, as specified by the funding body Composites Innovation Cluster (Datacomp), were: a plain weave spread tow T700 carbon composite, a non-crimp 0°/90° S2-glass composite, an interlayer fibre hybrid of the two aforementioned monolithic composites, and an intralayer fibre hybrid 2x2 twill weave T700 carbon/Vectran composite, all within an MTM57 epoxy matrix and manufactured by Resin Film Infusion (RFI). Standardised and non-standardised testing was employed to determine the in-plane material properties of each material in tension, compression, and shear, as well as interlaminar fracture toughness in Mode I and Mode II. Subsequently, a novel Compact Tension (CT) specimen geometry was developed to alleviate premature out-of-plane buckling and premature compressive failure. This was imperative in capturing the materials translaminar fracture toughnesses since the monolithic S2-glass composite and the intralayer fibre hybrid T700 carbon/Vectran failed prematurely when utilising typical standard CT test geometries. Once the in-plane material properties, and interlaminar and translaminar fracture toughnesses were measured, an existing energy-based bilinear plane stress traction-separation numerical modelling approach was used to provide insight into the complex failure processes associated with low velocity impacts. The fibre hybrid composites as well as their monolithic glass and carbon fibre composite counterparts were subjected to two discrete impact energy levels and their experimental load response curves and failure modes showed good agreement with the numerical modelling. Finally, a 1:5 reduced scale car bonnet made from the interlayer and intralayer fibre hybrid composites was subjected to low velocity impacts at two discrete energy levels and compared to the same numerical modelling strategy as used with the plate impact study. A novel experimental test rig was developed which allowed for quantifiable boundary conditions to be numerically modelled, presenting good comparison to the impactor tup experimental load response curves as well as two experimental independent strain gauge readings.
Projeto Aberto às Comunidades Contributo das Artes Plásticas/Educação Visual nas Práticas Multi(Inter)Culturais no Ensino Básico
Creators: name: Pestana, Maria Assunção
name: Lamas, Estela Pinto Ribeiro
Publisher: name: E- Revista de Estudos Interculturais
Year: 2021

description: Constata-se que a multi(inter)cultaridade – multiculturas, suas interações e implicações sociais –, é hoje apanágio de grande debate na formação de professores do Ensino Básico, no sentido de problematizar e maximizar o modo como esta se processa, bem como de monitorizar a diversidade cultural presente nos diferentes ambientes educativos e, ainda, de motivar os intervenientes e levar às as boas práticas pedagógicas, neste domínio e de forma ampla ao nível do ensino em geral. Esta formação implicará, desde logo, estratégias e ferramentas específicas dirigidas aos diferentes ambientes socioculturais, seja através da formulação de propostas criativas, tecnológicas, atuais, inclusivas e diversificadas, dirigidas a toda uma comunidade escolar. Enfatizamos, pois, que as Artes Plásticas/Comunicação Visual, em consonância com outras formas artísticas, contribuem, de forma explícita e implícita, para uma maior visibilidade comunitária desta temática, tão atual. Nesse sentido, centramo-nos na criação de um projeto que possa contribuir para o desenvolvimento do indivíduo per se no todo do seu ser e como cidadão do mundo.
description: E- Revista de Estudos Interculturais , Vol. 2 N.º 7 (2019)
title: ADCO, Ordre cistercien et abbaye de Cîteaux : comptes pour l'ordre (1337-1347), comptes du boursier (1377-1402) (11 H 1160), f. 00466
Creators: name: de la Côte-d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CBMA/CG21/F.PETOT/2017
name: Petot, Frédéric
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: comptes
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: Ordre cistercien et abbaye de Cîteaux : comptes pour l'ordre (1337-1347), comptes du boursier (1377-1402), Archives départementales de la Côte-d'Or, (11 H 1160). Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Ordre cistercien et abbaye de Cîteaux : comptes pour l'ordre (1337-1347), comptes du boursier (1377-1402), Archives départementales de la Côte-d'Or, (11 H 1160), f. 00466, in Projet CBMA - Corpus Burgundiae Medii Aevi \[Ressource en ligne\], https:// manuscrits.cbma-project.eu/
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
Ground state wave functions for the quantum Hall effect on a sphere and the Atiyah-Singer index theorem
Creators: name: Dolan, Brian P.
name: Hunter-McCabe, Aonghus
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The quantum Hall effect is studied in a spherical geometry using the Dirac operator for non-interacting fermions in a background magnetic field, which is supplied by a Wu-Yang magnetic monopole at the centre of the sphere. Wave functions are cross-section of a non-trivial $U(1)$ bundle, the zero point energy then vanishes and no perturbations can lower the energy. The Atiyah-Singer index theorem constrains the degeneracy of the ground state.
 The fractional quantum Hall effect is also studied in the composite Fermion model. Vortices of the statistical gauge field are supplied by Dirac strings associated with the monopole field. A unique ground state is attained only if the vortices have an even number of flux units and act to counteract the background field, reducing the effective field seen by the composite fermions. There is a unique gapped ground state and, for large particle numbers, fractions $ν=\frac{1}{2 k+1}$ are recovered.
description: 16 pages, minor typos corrected in v3. This is an author-created, un-copyedited version of an article published in Journal of Physics A. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. This article is published under a CC BY licence. Version of Record is available online at https://doi.org/10.1088/1751-8121/ab85e1
Sample Variance of the Higher-Order Cumulants of Cosmic Density and Velocity Fields
Creators: name: Seto, Naoki
name: Yokoyama, Jun'ichi
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: If primordial fluctuation is Gaussian distributed, higher-order cumulants of the cosmic fields reflect nonlinear mode coupling and provide useful information of gravitational instability picture of structure formation. We show that their expected deviation (sample variance) from the universal values is nonvanishing even in linear theory in the case where observed volume is finite. As a result, we find that the relative sample variance of the skewness of the smoothed velocity divergence field remains as large as $\sim 30%$ even if the survey depth is as deep as $\sim 150h^{1}Mpc$.
description: 8 pages including 1 figure, aas.tex
Premature dismissal of high-redshift elliptical galaxies
Creators: name: Jimenez, Raul
name: Friaca, Amancio
name: Dunlop, James
name: Terlevich, Roberto
name: Peacock, John
name: Nolan, Louisa
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: It has recently been argued that single-collapse high-redshift models for elliptical galaxy formation can be rejected because they predict large numbers of very red galaxies at intermediate redshifts which are not seen in deep optical-infrared surveys. We argue, however, that this conclusion is premature since, while much effort has been invested in refining the predictions of hierarchical CDM models, only very simplistic models have been used to study the evolution of galaxies in other cosmogonies (e.g. isocurvature models). We demonstrate that the use of a more realistic multi-zone chemo-dynamical single-collapse model, yields colours at intermediate redshifts which are much bluer than inferred from the one-zone model, and indeed are comparable to those predicted by hierarchical merging despite still allowing $> 90%$ of the final stellar mass of elliptical galaxies to be formed in the first Gyr of their evolution. We, therefore, conclude that the one-zone model should be avoided to predict the colours of high-redshift galaxies and that the use of realistic multi-zone models allows the existence of ellipticals at high redshift, being their dismissal premature.
description: Submitted to MNRAS
Tracking in information space
Creators: name: Greenhough, Helen
Publisher: name: Imperial College London
Year: 2018

description: A long-term ambition of researchers is to develop readily available expert systems to support decision makers. There is great interest in combining web-based information and Machine Learning techniques, which are enjoying a renaissance attributed to the ready availability of computing resources, to answer real-world strategic questions. Given the contribution of industry to overall national economic health, one such question is what industry mix is necessary to support national strategy? The proposed conceptual graph model and accompanying framework, applied the strengths of machines and computational techniques to inform national industrial policy in a data-driven paradigm. This thesis makes three contributions: the development of a novel conceptual graph model and associated framework, both based on a multi-disciplinary literature review, and their subsequent demonstration using both simulated binary and real-world statistical data. The graph model, drawing from experience in the government defence sector, linked national intent to industry via intermediate nodes such as capability. The wider framework combined supervised Bayesian Belief Network Machine Learning with web-scraping via the graph model to infer national intent. Proof of concept was achieved through the use of both simulated and real-world data, confirming the ability of the chosen inference approach to learn the required relations. Ultimately the framework was able to identify industry variables which best explain observed capability for two real-world case studies although it failed to draw inferences across industries using real data. Further avenues of investigation were addressed, including the use of unstructured text as a data source and alternative Machine Learning methods to account for time-series data. The potential of the web as a data source is truly staggering. This thesis goes some way to bridging the gap between this vast store of information and its incorporation in an evidence-driven pipeline in support of strategic decision making.
A Universidade Metodista Unida De Moçambique – Reflexões e Prospectivas
Creators: name: Lamas, Marco Ribeiro
name: Hoguane, Filipe Augusto
name: Maria, Anabela Lima
name: Gomes, Margarida Maria
name: Guidione, Dinis Armando
name: Lamas, Edgar Manuel
name: Lamas, Magali Veríssimo
name: Lamas, Estela Pinto Ribeiro
Publisher: name: E- Revista de Estudos Interculturais
Year: 2021

description: Introdução – Enquadramento As Jornadas UMUM têm a sua primeira edição em 2017, nos dias 17, 18 e 19 de Maio. Elas surgiram como um evento a realizar anualmente, pretendendo contribuir para o debate de ideias e partilha de conhecimento sobre temas relacionados com os cursos da Universidade Metodista Unida de Moçambique (UMUM). Nesse sentido, para além de visar divulgar a Universidade, o propósito foi o de promover um contexto académico, sustentado numa forte e positiva interacção entre os diversos actores implicados na Universidade, bem como construir uma rede de relações com o meio envolvente – escolar, empresarial, associativo –, com o sector público, regional e nacional e, complementarmente, criar condições para a futura inserção dos estudantes no mercado de trabalho. Para atingir os objectivos definidos, houve à partida a vontade de celebrar protocolos, parcerias com instituições educativas, empresariais, serviços/sectores públicos e privados, organizações nacionais/internacionais bem como viabilizar um relacionamento comercial, actividades de formação, programas de estágios; a inserção dos seus graduados no mercado de trabalho; a condução de investigação aplicada; a utilização recíproca de infra‐estruturas e equipamentos e ainda a promoção de iniciativas conjuntas. [..]
description: E- Revista de Estudos Interculturais , Vol. 2 N.º 7 (2019)
Explicit $L^2$ bounds for the Riemann $ζ$ function
Creators: name: Dona, Daniele
name: Helfgott, Harald A.
name: Alterman, Sebastian Zuniga
Publisher: name: arXiv
Year: 2019
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11M06

description: Explicit bounds on the tails of the zeta function $ζ$ are needed for applications, notably for integrals involving $ζ$ on vertical lines or other paths going to infinity. Here we bound weighted $L^2$ norms of tails of $ζ$.
 Two approaches are followed, each giving the better result on a different range. The first one is inspired by the proof of the standard mean value theorem for Dirichlet polynomials. The second approach, superior for large $T$, is based on classical lines, starting with an approximation to $ζ$ via Euler-Maclaurin.
 Both bounds give main terms of the correct order for $0<σ\leq 1$ and are strong enough to be of practical use for the rigorous computation of improper integrals.
 We also present bounds for the $L^{2}$ norm of $ζ$ in $[1,T]$ for $0\leqσ\leq 1$.
description: 37 pages; v7: version accepted by the journal
Additional file 3: of Do hotspots fuel malaria transmission: a village-scale spatio-temporal analysis of a 2-year cohort study in The Gambia
Creators: name: Stresman, Gillian
name: Mwesigwa, Julia
name: Achan, Jane
name: Giorgi, Emanuele
name: Worwui, Archibald
name: Jawara, Musa
name: Tanna, Gian Di
name: Bousema, Teun
name: Geertruyden, Jean-Pierre Van
name: Drakeley, Chris
name: DâAlessandro, Umberto
Publisher: name: figshare
Year: 2018
Subjects: subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: 60506 Virology
subject: Computational Biology

description: Results of analysis stratified by whether an infection was symptomatic or asymptomatic. Symptomatic infections were those individuals with fever and a confirmed infection by rapid diagnostic test (RDT), whereas asymptomatic infections were those who were febrile but RDT negative and positive by polymerase chain reaction (PCR) or were afebrile and positive for malaria by PCR. The distribution of prevalence of infection type per month per village as well as the predicted monthly prevalence of each infection type per village are shown. (DOCX 4478 kb)