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4 results on '"Eduardo Cobos"'

1. A Collaborative Filtering Approach Based on Naïve Bayes Classifier

Author

Priscila Valdiviezo-Diaz, Fernando Ortega, Eduardo Cobos, and Raul Lara-Cabrera

Subjects
Recommender systems, collaborative filtering, Naïve Bayes classifier, hybrid CF, reliability measure, Electrical engineering. Electronics. Nuclear engineering, TK1-9971
Abstract

Recommender system is an information filtering tool used to alleviate information overload for users on the web. Collaborative filtering recommends items to users based on their historical rating information. There are two approaches: memory-based, which usually provides inaccurate but explainable recommendations; and model-based, whose recommendations are more precise but hard to understand. Here we propose a Bayesian model that not only provides us with recommendations as good as matrix factorization models, but these predictions can also be explained. The model is based on both user-based and item-based collaborative filtering approaches, which recommends items by using similar users' and items' information, respectively. Experiments carried out using four datasets present good results compared to several state-of-the-art baselines, achieving the best performance using the Normalized Discounted Cumulative Gain (nDCG) quality measure and also improving the prediction's accuracy in some datasets.

Published
2019
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2. Una polémica higienista y los cementerios de Caracas en el primer guzmanato, 1870-1877

Author

Eduardo Cobos

Subjects
public health, Guzmán Blanco, cemeteries, Anthropology, GN1-890, Latin America. Spanish America, F1201-3799
Abstract

Venezuelan public health by the end of nineteenth century was, to a large extent, based on ideas developed by President Antonio Guzmán Blanco, together with intellectuals and publicists, and first implemented through political and legal reforms during his rule from 1870-1877. A key aspect of Blanco’s administration on that regard was a controversy over Catholic cemeteries in northern Caracas, stirred up by the press and supported by contemporary hygienist theory, giving the state an excuse to shut them down. Guzmán's ideas showed European influences on his re-urbanization plans for the capital, which aimed, among other things, to gain control over cemeteries which until then had been under the Catholic Church’s control. This led to the construction of secular graveyards in the outskirts of the city.

Published
2009
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3. TACNA Y ARICA: VISUALIZACIONES, PLEBISCITO Y NUEVA FRONTERA EN LA UNIÓN DE VALPARAÍSO, 1922

Author

Pablo Aravena and Eduardo Cobos

Subjects
Cultural Studies, History, reportaje periodístico, chilenización, Anthropology, nueva frontera norte, Plebiscito
Abstract

espanolLa presente investigacion tiene como proposito indagar ciertos aspectos relacionados con el discurso nacional de principios del siglo XX, centrando nuestra atencion en un amplio reportaje acerca de Arica y Tacna publicado por entregas en el diario La Union de Valparaiso en diciembre de 1922, momento de tension diplomatica entre Peru y Chile cuyo entorno era una posible definicion plebiscitaria de los limites de la nueva frontera norte. Este tipo de reportajes -que basaban su efectividad en la conjuncion entre imagenes fotograficas y textos- fueron utilizados como una postura periodistica que se correspondia con la alianza practicada entre las politicas de chilenizacion del Estado y las empresas editoriales para crear y fomentar un imaginario nacionalista postguerra del Pacifico. En este sentido, la intencionalidad estrategica del reportaje de La Union consistio en replicar una idea general pre concebida, estereotipada, que daba a entender la conveniencia de que los territorios ocupados y aun en disputa continuaran bajo el dominio de Chile, debido a que el pais era el mas apto para ejercer el progreso y la modernizacion. Estos intereses se habian tornado esenciales para la elite portena, que fue la tribuna hacia donde apunto en especial el diario. EnglishThis investigation aims to look at certain issues related to Chile's national discourse at the beginning of the twentieth century, focusing our attention on a wide-ranging report about Arica and Tacna published in installments in the newspaper La Union in December 1922. A moment of diplomatic tension between Peru and Chile whose backdrop was the possible definition of the new northern border's boundaries through a plebiscite. This kind of report - whose effectiveness was based on bringing photographic images and text- was used as a journalistic position that corresponded with the alliance between the State and the press over the policies of "Chilenisation" to create and encourage nationalist sentiment after the War of the Pacific. In this sense, the report's strategic intention in La Union consisted in replicating a preconceived and stereotypical general idea that held that it was con venient for the occupied territories still in dispute to continue under Chilean rule since the country was better suited to bringing progress and modernization. These interests had become essential for Valparaiso's elite, the audience at which the newspaper was aiming in particular.

Published
2020

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