WMT 2016 Multimodal translation system description based on bidirectional recurrent neural networks with double-embeddings

Bidirectional Recurrent Neural Networks (BiRNNs) have shown outstanding results on sequence-to-sequence learning tasks. This architecture becomes specially interesting for multimodal machine translation task, since BiRNNs can deal with images and text. On most translation systems the same word embedding is fed to both BiRNN units. In this paper, we present several experiments to enhance a baseline sequence-to-sequence system (Elliott et al., 2015), for example, by using double embeddings. These embeddings are trained on the forward and backward direction of the input sequence. Our system is trained, validated and tested on the Multi30K dataset (Elliott et al., 2016) in the context of theWMT 2016Multimodal Translation Task. The obtained results show that thedouble-embedding approach performs significantly better than the traditional single-embedding one.Postprint (published version

DESIGUALDADE, DIFERENÇA, ARTICULAÇÃO

Neste artigo, estudam-se as tensões e superposições entre desigualdade e diferença a partir de duas questões complementares: Quando diferenças se tornam politicamente relevantes? Como desigualdades e diferenças se correlacionam? O argumento é desenvolvido, primeiramente, mediante a discussão crítica de três abordagens influentes nos debates acadêmicos e políticos contemporâneos, a saber: o paradigma do reconhecimento-redistribuição, como é desenvolvido por N. Fraser e A. Honneth, a abordagem das desigualdades categoriais de C. Tilly e a abordagem das desigualdades horizontais-verticais de F. Stewart. A despeito de suas divergências, essas três abordagens apresentam uma limitação conceitual comum, que é tratar diferenças dinâmicas como categorias binárias e fixas: brancos-negros, homens-mulheres, mestiços-indígenas, etc. Para superar esse déficit, com base no conceito de articulação, desenvolve-se uma matriz analítica segundo a qual diferenças representam posicionalidades ou lugares de enunciação no âmbito de relações sociais hierárquicas. O nexo entre diferenças e desigualdades é ilustrado por meio da articulação recente dos quilombolas no Brasil.INEQUALITY, DIFFERENCE, ARTICULATION This article studies the tensions and overlaps between inequality and difference starting from two complementary questions: When do differences become politically relevant? How do inequalities and differences correlate? The argument is first developed through a critical discussion of three influential approaches in contemporary academic and political debates: the recognition-redistribution paradigm, as developed by N. Fraser and A. Honneth, the categorical inequalities approach of C. Tilly and the horizontal-vertical inequalities approach of F. Stewart. In spite of their divergences, these three approaches present a common conceptual limitation, which is to treat dynamic differences as binary and fixed categories: black-whites, menwomen, mestizos-indigenous, etc. To overcome this deficit, I develop in the present article, starting from the concept of articulation, an analytical matrix according to which differences represent positionalities or sites of enunciation within hierarchical social relations. The nexus between differences and inequalities is illustrated by the recent articulation of the quilombolas in Brazil.Key words: Difference. Inequality. Articulation. Positionality. Quilombolas.INÉGALITÉ, DIFFÉRENCE, ARTICULATION Cet article étudie les tensions et les chevauchements entre inégalités et différences à partir de deux questions complémentaires: Quand les différences deviennent-elles politiquement pertinentes? Quel est la corrélation entre les inégalités et les différences? L’argument est d’abord développé à travers une discussion critique de trois approches influentes dans les débats académiques et politiques contemporains: le paradigme reconnaissanceredistribution, tel que développé par N. Fraser et A. Honneth, l’approche d’inégalité catégorielle de C. Tilly et l’approche des inégalités horizontaleverticale de F. Stewart. Malgré leurs divergences, ces trois approches présentent une limitation conceptuelle commune, qui consiste à traiter les différences dynamiques comme catégories binaires et fixes: blanc-noir, hommes-femmes, métis-indigènes, etc. Pour surmonter ce déficit, le présent article développe, à partir du concept d’articulation, une matrice analytique selon laquelle les différences représentent des positionalités ou des sites d’énonciation dans des relations sociales hiérarchisées. Le lien entre les différences et les inégalités est illustré par la récente articulation des quilombolas au Brésil.Mots-clés: Différence. Inégalité. Articulation. Positionnalité. Quilombolas

Overconfidence and excess entry: a comparison between students and managers

Overconfidence can lead to excessive business entry. Here we replicate the pioneer experiment finding this nexus (Camerer and Lovallo 1999) and extend it in two major directions: (1) to consider managers as well as student subjects and (2) to explicitly take into account selected characteristics of the manager subjects. We find that managers are more prone to the nexus overconfidence-excess entry than students are. In particular, we find that left-handed, married, and emotionally aroused managers are more prone to excess entry.excess business entry, overconfidence, unrealistic optimism

Stock selection based on cluster analysis

We put forward a technique based on cluster analysis to group stocks in spot markets according to a risk-return criterion. We show how an informed investor will make money using the cluster analysis to select stocks of major companies from North and South America.

FORS2/VLT survey of Milky Way globular clusters I. Description of the method for derivation of metal abundances in the optical and application to NGC 6528, NGC 6553, M 71, NGC 6558, NGC 6426 and Terzan 8

(abridged) We have observed almost 1/3 of the globular clusters in the Milky Way, targeting distant and/or highly reddened objects, besides a few reference clusters. A large sample of red giant stars was observed with FORS2@VLT/ESO at R ~ 2,000. The method for derivation of stellar parameters is presented with application to six reference clusters. We aim at deriving the stellar parameters effective temperature, gravity, metallicity and alpha-element enhancement, as well as radial velocity, for membership confirmation of individual stars in each cluster. We analyse the spectra collected for the reference globular clusters NGC 6528, NGC 6553, M 71, NGC 6558, NGC 6426 and Terzan 8. They cover the full range of globular cluster metallicities, and are located in the bulge, disc and halo. Full spectrum fitting techniques are applied, by comparing each target spectrum with a stellar library in the optical region at 4560-5860 A. We employed the library of observed spectra MILES, and the synthetic library by Coelho et al. (2005). Validation of the method is achieved through recovery of the known atmospheric parameters for 49 well-studied stars that cover a wide range in the parameter space. We adopted as final stellar parameters (effective temperatures, gravities, metallicities) the average of results using MILES and Coelho et al. libraries. We identified 4 member stars in NGC 6528, 13 in NGC 6553, 10 in M 71, 5 in NGC 6558, 5 in NGC 6426 and 12 in Terzan 8. Radial velocities, Teff, log(g), [Fe/H] and alpha-element enhancements were derived. We derived abundances for NGC 6426 from spectroscopy for the first time. The method proved to be reliable for red giant stars observed with resolution R ~ 2,000, yielding results compatible with high-resolution spectroscopy. The derived alpha-element abundances show [A/Fe] vs. [Fe/H] consistent with that of field stars at the same metallicities.Comment: 22 pages, 21 figures, accepted for publication in A&

Disposition effect and gender

Investors seem to hold on to their losing stocks to a greater extent than they hold on to their winning stocks. This well-document behavioral regularity is termed disposition effect (Shefrin and Statman 1985). We set an experiment to replicate results from a previous study of the disposition effect (Weber and Camerer 1998), and further show that a subject’s gender may interfere with the effect’s detection.

High-Temperature Mineral Formation after Firing Clay Materials Associated with Mined Coal in Teruel (Spain)

The production of porcelain stoneware has experienced a considerable increase. Therefore, it was necessary to undertake an investigation that would allow knowing the mineralogical evolution that porcelain stoneware undergoes during the firing process, as well as establishing the influence of the formation of mullite and other mineral or vitreous phases and their quantification. The firing transformations of mine spoils associated with mined coal in the Utrillas-Escucha-Estercuel and Ariño-Andorra areas are studied in this paper. The mineralogical composition of the bulk mine spoils is kaolinite, illite, chlorite, and smectites (in traces), with quartz and feldspar, and minor hematite, calcite, and dolomite. The main objective is to understand the generation of high-temperature mineral phases after firing, and their quantification. The formation of mullite and other high-temperature phases are studied from samples that include variable proportions of illite. Samples with a high content of illite generate mullite at 995 °C. Cristobalite was not detected as a high-temperature phase. Mullite is the most abundant mineral. The hercynite content is higher at low temperatures (995 °C), and hematite content is higher at 1150 °C. The vitreous phase represents about 50% of fired bodies. Despite observing a porous microstructure, the non-porous areas are well sintered