Comparative analysis of the computational characteristics in modern sentiment analysis systems for Spanish

Existen múltiples sistemas para análisis de sentimiento con diseños heterogéneos y niveles variados de desempeño. En este artículo se presenta un modelo de generación de especificaciones computacionales de los sistemas para identificación de polaridad tendientes a facilitar comparaciones más profundas y detalladas de las técnicas que se utilizan. Buscamos crear conciencia entre los investigadores de la información necesaria para la construcción de especificaciones que permitan replicar sistemas. A su vez, discutimos las dificultades que se tiene al evaluar y al hacer comparaciones congruentes entre sistemas e ir más allá del resultado que se puede obtener para una tarea específica sobre un conjunto de datos particular. Estamos convencidos de que una estructuración completa y clara de todos los procesos y de los ajustes a que son sometidos los trabajos presentados en las competencias es crucial para enriquecer el conocimiento del uso de estrategias hacia la mejora general de los sistemas.There are multiple systems for sentiment analysis with heterogeneous designs and varying levels of performance. In this paper, we propose a model of computational specifications of polarity identification systems. The model makes easier the comparison of the different techniques used. We seek to create awareness among researchers of the necessary information for the elaboration of specifications that allow the replication of systems. Additionally, we discuss the difficulties of evaluating and conducting consistent comparisons among systems, and going beyond the result that can be obtained for a specific task on a particular data set. We are convinced that a complete and clear framework that encompasses all the modules of the systems that participate in competitions is crucial to enrich the knowledge for improving the state-of-the-art in sentiment analysis.Se agradece el apoyo de MICITT y CONICIT del Gobierno de Costa Rica y al proyecto IN403016 DGAPA-PAPIIT de la UNAM. Eugenio Martínez Cámara fue financiado por el programa Juan de la Cierva Formación (FJCI-2016-28353) del Gobierno de España

Un corpus para la investigación en la extracción de términos y contextos definitorios: hacia un diccionario de las sexualidades desde México

Neste trabalho, faz-se uma descrição da metodologia utilizada na extração terminológica a partir de um corpus sobre o tema da sexualidade no México. Descreve-se o processo de compilação do corpus, assim como a fase de pré-processamento e a etiquetagem em XML. Especificamente, este corpus serve para a extração de termos e seus contextos definitórios. Neste cenário, examinamos o sistema Ecode, uma ferramenta de extração de contextos definitórios. A idéia é utilizar esses recursos para a geração automática de dicionários, isto é, de listas de termos e contextos definitórios que possam servir de base para a construção de dicionários especializados. a integração proposta dos métodos descritos constitui um recurso valioso aplicável a diversas variantes do espanhol,  no caso aqui, dos registros específicos: 1) da linguagem de especialidade sobre o tema da sexualidade e 2) da linguagem familiar dos falantes do espanhol falado no México

Reducing the environmental impact of surgery on a global scale: systematic review and co-prioritization with healthcare workers in 132 countries

Abstract Background Healthcare cannot achieve net-zero carbon without addressing operating theatres. The aim of this study was to prioritize feasible interventions to reduce the environmental impact of operating theatres. Methods This study adopted a four-phase Delphi consensus co-prioritization methodology. In phase 1, a systematic review of published interventions and global consultation of perioperative healthcare professionals were used to longlist interventions. In phase 2, iterative thematic analysis consolidated comparable interventions into a shortlist. In phase 3, the shortlist was co-prioritized based on patient and clinician views on acceptability, feasibility, and safety. In phase 4, ranked lists of interventions were presented by their relevance to high-income countries and low–middle-income countries. Results In phase 1, 43 interventions were identified, which had low uptake in practice according to 3042 professionals globally. In phase 2, a shortlist of 15 intervention domains was generated. In phase 3, interventions were deemed acceptable for more than 90 per cent of patients except for reducing general anaesthesia (84 per cent) and re-sterilization of ‘single-use’ consumables (86 per cent). In phase 4, the top three shortlisted interventions for high-income countries were: introducing recycling; reducing use of anaesthetic gases; and appropriate clinical waste processing. In phase 4, the top three shortlisted interventions for low–middle-income countries were: introducing reusable surgical devices; reducing use of consumables; and reducing the use of general anaesthesia. Conclusion This is a step toward environmentally sustainable operating environments with actionable interventions applicable to both high– and low–middle–income countries

Un corpus para la investigación en la extracción de términos y contextos definitorios: hacia un diccionario de las sexualidades desde México

Neste trabalho, faz-se uma descrição da metodologia utilizada na extração terminológica a partir de um corpus sobre o tema da sexualidade no México. Descreve-se o processo de compilação do corpus, assim como a fase de pré-processamento e a etiquetagem em XML. Especificamente, este corpus serve para a extração de termos e seus contextos definitórios. Neste cenário, examinamos o sistema Ecode, uma ferramenta de extração de contextos definitórios. A idéia é utilizar esses recursos para a geração automática de dicionários, isto é, de listas de termos e contextos definitórios que possam servir de base para a construção de dicionários especializados. a integração proposta dos métodos descritos constitui um recurso valioso aplicável a diversas variantes do espanhol,  no caso aqui, dos registros específicos: 1) da linguagem de especialidade sobre o tema da sexualidade e 2) da linguagem familiar dos falantes do espanhol falado no México

Measurement of the impact-parameter dependent azimuthal anisotropy in coherent ρ0 photoproduction in Pb–Pb collisions at √sNN = 5.02 TeV

The first measurement of the impact-parameter dependent angular anisotropy in the decay of coherently photoproduced ρ0 mesons is presented. The ρ0 mesons are reconstructed through their decay into a pion pair. The measured anisotropy corresponds to the amplitude of the cos(2ϕ) modulation, where ϕ is the angle between the two vectors formed by the sum and the difference of the transverse momenta of the pions, respectively. The measurement was performed by the ALICE Collaboration at the LHC using data from ultraperipheral Pb−Pb collisions at a center-of-mass energy of sNN−−−√ = 5.02 TeV per nucleon pair. Different impact-parameter regions are selected by classifying the events in nuclear-breakup classes. The amplitude of the cos(2ϕ) modulation is found to increase by about one order of magnitude from large to small impact parameters. Theoretical calculations, which describe the measurement, explain the cos(2ϕ) anisotropy as the result of a quantum interference effect at the femtometer scale that arises from the ambiguity as to which of the nuclei is the source of the photon in the interaction

Investigating the nature of the K∗0(700) state with π±K0S correlations at the LHC

The first measurements of femtoscopic correlations with the particle pair combinations π±K0S in pp collisions at s√=13 TeV at the Large Hadron Collider (LHC) are reported by the ALICE experiment. Using the femtoscopic approach, it is shown that it is possible to study the elusive K∗0(700) particle that has been considered a tetraquark candidate for over forty years. Boson source parameters and final-state interaction parameters are extracted by fitting a model assuming a Gaussian source to the experimentally measured two-particle correlation functions. The final-state interaction is modeled through a resonant scattering amplitude, defined in terms of a mass and a coupling parameter, decaying into a π±K0S pair. The extracted mass and Breit-Wigner width, derived from the coupling parameter, of the final-state interaction are found to be consistent with previous measurements of the K∗0(700). The small value and increasing behavior of the correlation strength with increasing source size support the hypothesis that the K∗0(700) is a four-quark state, i.e. a tetraquark state. This latter trend is also confirmed via a simple geometric model that assumes a tetraquark structure of the K∗0(700) resonance

Measurement of the production cross section of prompt Ξ0c baryons in p–Pb collisions at √sNN = 5.02 TeV

The transverse momentum (pT) differential production cross section of the promptly-produced charm-strange baryon Ξ0c (and its charge conjugate Ξ0c¯¯¯¯¯¯) is measured at midrapidity via its hadronic decay into π+Ξ− in p−Pb collisions at a centre-of-mass energy per nucleon−nucleon collision sNN−−−√ = 5.02 TeV with the ALICE detector at the LHC. The Ξ0c nuclear modification factor (RpPb), calculated from the cross sections in pp and p−Pb collisions, is presented and compared with the RpPb of Λ+c baryons. The ratios between the pT-differential production cross section of Ξ0c baryons and those of D0 mesons and Λ+c baryons are also reported and compared with results at forward and backward rapidity from the LHCb Collaboration. The measurements of the production cross section of prompt Ξ0c baryons are compared with a model based on perturbative QCD calculations of charm-quark production cross sections, which includes only cold nuclear matter effects in p−Pb collisions, and underestimates the measurement by a factor of about 50. This discrepancy is reduced when the data is compared with a model in which hadronisation is implemented via quark coalescence. The pT-integrated cross section of prompt Ξ0c-baryon production at midrapidity extrapolated down to pT = 0 is also reported. These measurements offer insights and constraints for theoretical calculations of the hadronisation process. Additionally, they provide inputs for the calculation of the charm production cross section in p−Pb collisions at midrapidity

Measurement of Ω0c baryon production and branching-fraction ratio BR(Ω0c → Ω−e+νe)/BR(Ω0c → Ω−π+) in pp collisions at √s = 13 TeV

The inclusive production of the charm-strange baryon Ω0c is measured for the first time via its semileptonic decay into Ω−e+νe at midrapidity (|y| < 0.8) in proton–proton (pp) collisions at the centre-of-mass energy √s = 13 TeV with the ALICE detector at the LHC. The transverse momentum (pT) differential cross section multiplied by the branching ratio is presented in the interval 2 < pT < 12 GeV/c. The branching-fraction ratio BR(Ω0c → Ω−e+νe)/BR(Ω0c → Ω−π+) is measured to be 1.12 ± 0.22 (stat.) ± 0.27 (syst.). Comparisons with other experimental measurements, as well as with theoretical calculations, are presented

K∗(892)± resonance production in Pb−Pb collisions at √sNN = 5.02 TeV

The production of K∗(892)± meson resonance is measured at midrapidity (|y|8 GeV/c, consistent with measurements for other light-flavored hadrons. The smallest values are observed in most central collisions, indicating larger energy loss of partons traversing the dense medium

Photoproduction of K+K− pairs in ultra-peripheral collisions

K+K− pairs may be produced in photonuclear collisions, either from the decays of photoproduced ϕ(1020) mesons, or directly as non-resonant K+K− pairs. Measurements of K+K− photoproduction probe the couplings between the ϕ(1020) and charged kaons with photons and nuclear targets. We present the first measurement of coherent photoproduction of K+K− pairs on lead ions in ultra-peripheral collisions using the ALICE detector, including the first investigation of direct K+K− production. There is significant K+K− production at low transverse momentum, consistent with coherent photoproduction on lead targets. In the mass range 1.1<MKK<1.4 GeV/c2 above the ϕ(1020) resonance, for rapidity |yKK|<0.8 and pT,KK<0.1 GeV/c, the measured coherent photoproduction cross section is dσ/dy = 3.37 ± 0.61 (stat.) ± 0.15 (syst.) mb. The centre-of-mass energy per nucleon of the photon-nucleus (Pb) system WγPb,n ranges from 33 to 188 GeV, far higher than previous measurements on heavy-nucleus targets. The cross section is larger than expected for ϕ(1020) photoproduction alone. The mass spectrum is fit to a cocktail consisting of ϕ(1020) decays, direct K+K− photoproduction, and interference between the two. The confidence regions for the amplitude and relative phase angle for direct K+K− photoproduction are presented