1,782 research outputs found
UFF Contra o Coronavírus: #OrgulhoDeSerUFF - Esteban Clua - Prof. do Instituto de Computação - UFF
No full textVídeo com tradução e interpretação em Língua Brasileira de Sinais (Libras)Como será que as Unidades da #UFF tem funcionado durante esse período de isolamento? Embora o início do ano letivo tenha sido adiado, a UFF continua a todo vapor, por isso convidamos alguns diretores de Unidade, Pro-reitores e pesquisadores para falar sobre como tem trabalhado durante esse período e o que tem feito nessa quarentena. Na luta contra o Covid-19, a Universidade Federal Fluminense está organizando múltiplas frentes de trabalho que contam com a participação da comunidade acadêmica. Neste período de isolamento social, diversos setores seguem atuantes na pesquisa, extensão e inovação mesmo diante da quarentena. O professor do Instituto de Computação da UFF, Esteban Walter Gonzalez Clua que atua na área de jogos, realidade virtual, e computação gráfica, fala sobre os cursos online gratuitos que estão sendo oferecidos pelo instituto
Learning How to Play Bomberman with Deep Reinforcement and Imitation Learning
No full textPart 3: Entertainment AlgorithmsInternational audienceMaking artificial agents that learn how to play is a long-standing goal in the area of Game AI. Recently, several successful cases have emerged driven by Reinforcement Learning (RL) and neural network-based approaches. However, in most of the cases, the results have been achieved by training directly from pixel frames with valuable computational resources. In this paper, we devise agents that learn how to play the popular game of Bomberman by relying on state representations and RL-based algorithms without looking at the pixel level. To that, we designed five vector-based state representations and implemented Bomberman on the top of the Unity game engine through the ML-agents toolkit. We enhance the ML-agents algorithms by developing an Imitation-based learner (IL) that improves its model with the Actor-Critic Proximal-Policy Optimization (PPO) method. We compared this approach with a PPO-only learner that uses either a Multi-Layer Perceptron or a Long-Short Term-Memory network (LSTM). We conducted several pieces of training and tournament experiments by making the agents play against each other. The hybrid state representation and our IL followed by PPO learning algorithm achieve the best overall quantitative results, and we also observed that their agents learn a correct Bomberman behavior
Furia sociológica
No full textEsta editorial busca presentar una hipótesis e interpretación sobre los sucesos del 2001. Se considera la perspectiva de los actores como una dimensión sustancial para comprender y presentar una explicación.Fil: de Gori, Jose Esteban Guillermo. Universidad Nacional de San Martín. Instituto de Altos Estudios Sociales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin
The Romanticism of Esteban Echeverría
No full textBakalářská práce zkoumá romantismus Estebana Echeverríi. Tento argentinský spisovatel z 19. století je považován za prvního romantického autora hispanoamerické literatury. V mládí odcestoval do Evropy a tato cesta ovlivnila jeho literární tvorbu. Po návratu do Argentiny uplatnil ve svých dílech zásady romantismu. Cílem práce je popsat, v čem spočívá romantismus Estebana Echeverríi na základě analýzy šesti děl: Cartas a un amigo, Elvira, o la novia del Plata, Los consuelos, La cautiva, El matadero a Avellaneda.The bachelor thesis examines the Romanticism of Esteban Echeverría. This Argentinian author from the nineteenth century is considered to be the first Romantic author of Hispanic American literature. In his youth he travelled to Europe and this travel marked his literary works. When he came back to Argentina he started to write according to the principles of Romanticism. The aim of the thesis is to describe how the Romanticism of Esteban Echeverría is constructed through the analysis of six of his works: Cartas a un amigo, Elvira, o la novia del Plata, Los consuelos, La cautiva, El matadero and Avellaneda
Virtual and Real Body Representation in Mixed Reality: An Analysis of Self-presence and Immersive Environments
No full textPart 1: Mixed RealityInternational audienceOver the last decade, most of studies were focused on assessments of presence, degrees of immersion and user involvement with virtual reality, few works, however, addressed the mixed reality environments. In virtual reality, mostly through an egocentric point of view, the user is usually represented by a virtual body. In this work, we present an approach where the user can see himself instead of a virtual character. Different than augmented reality approaches, we only detach the user’s body and his/her proxies interfaces. We conducted four experiments to measure and evaluate quantitatively and qualitatively the feeling of presence. We measure and compare the degree of presence in different modes and techniques of representation of the user’s body through virtually integrated questionnaires. We also analyzed what factors influence to a greater or lesser feeling of presence. For this study, we adapted a real bike with an haptic interface. Results show that there is not necessarily a better or worse type of avatar, but their appearance must match the scenarios and others elements in the virtual environment to greatly increase the participant sense of presence
Some reflections on the orientations and volume of accounting history research in the 21st century.
No full textEste artículo toma como punto de partida el 8th World Congress of Accounting Historians e intenta identificar las orientaciones que la investigación en historia de la contabilidad ha seguido desde entonces, es decir, desde el año 2000 hasta el 2007, los primeros años del siglo XX. El principal propósito de este ensayo es averiguar si ha habido novedades significativas en las direcciones de la investigación o, si por el contrario, su desarrollo ha seguido el curso previsible. Trataremos de asociar este propósito al estudio del volumen de la investigación publicada a este respecto en las principales revistas de contabilidad. Después de haber examinado y descrito la evolución de la historia de la contabilidad en estos primeros años del presente siglo, presentaremos algunas consideraciones personales acerca de los derroteros en que la investigación podría moverse en el próximo futuro. Taking as starting point the 8th World Congress of Accounting Historians this paper attempts to identify the orientations followed by accounting history research in the first years of the 21st century, that is, from 2000 up to 2007. The main purpose of the attempt is to find out whether there have been significant novelties in the directions of research or, on the contrary, its development has run in the foreseeable course. We shall try to associate this purpose to the study of the amount of related research published in the main accounting journals. After having examined and described the developments of accounting history research in the first years of present century, the paper presents some considerations on the directions in which research should move in the next future.Historia de la contabilidad, investigación, tendencias, siglo XXI. Accounting History, research, orientations, 21st century.
Virtual and Real Body Experience Comparison Using Mixed Reality Cycling Environment
No full textPart 1: Full PapersInternational audienceDifferent solutions present the usage of bicycles with Head Mounted Display (HMD) in which virtual scenarios are visualized as background for athletes training or as cardiac patient rehabilitation systems. However, assessments on presence, degrees of immersion and user involvement with real bicycles in those virtual scenarios still are rare. In this paper we present a haptic interface of a real bicycle using HMDs as a mixed reality display using a procedural city as a background scenario. To measure and evaluate presence, two experiments had been conducted. One that simulates a virtual reality mode and a second that corresponds to a mixed reality mode. By think aloud method, it was possible to analyze the degree of presence, through control, focus, immersion and involvement factors. Six of the seven participants described that immersion is augmented as well as the feeling of presence in the mixed reality interface, feeling a better experience with the improvement of movements. Issues related to comfort and the visual graphic were also evaluated with some results on the stimulus that also opens new possibilities for future works in different areas
El archipiélago urbano de Quito: claves para la autosuficiencia integrada
No full textDesde su fundación, Quito ha experimentado una constante tensión entre el crecimiento urbano y la complejidad de los accidentes naturales circundantes. Esto ha llevado a la creación de numerosos entornos urbanos marcadamente aislados, a menudo informales y altamente vulnerables a desastres naturales. A pesar de asociarse con el modelo de ciudad dormitorio, factores como las actividades agrícolas, la identidad indígena y los recursos naturales han dotado a estas “islas urbanas” de una “autosuficiencia integrada”. Esta condición ha sido puesta a prueba exitosamente en los últimos años frente a crisis sanitarias, socioeconómicas y de seguridad, gracias a su interacción con unidades urbanas cercanas y su capacidad de autoproducción. Este estudio ofrece un análisis cuantitativo y comparativo de un archipiélago urbano formado por 39 enclaves, basado en su accesibilidad, forma urbana y datos estadísticos y cartográficos recopilados in situ. Identifica factores clave que permiten la autosuficiencia, como la producción de alimentos, la gestión ambiental responsable, la economía circular, la identidad comunitaria, el reciclaje, el empleo local y la protección del entorno natural. El concepto de “Archipiélago Urbano” ilustra la tensión entre geometría y geografía, destacando áreas aisladas que, paradójicamente, interactúan, creando territorios propicios para un desarrollo resiliente y autosuficiente.Esta investigación sintetiza algunos de los resultados del Trabajo Fin de Máster elaborado en el MBArch Urbanismo, ETSABarcelona, tutorizado por el prof. Álvaro Clua (2023). El trabajo ha contado también con la colaboración del Colectivo Social Habitar y el Cabildo de la comuna de San José de Cocotog.Peer ReviewedPostprint (published version
Pequenos rituais (díptico)
No full textTitle: Small Rituals (diptych)Author: Juan Esteban ZapataTechnique: Oil on paperDimensions: 70 × 50 cmYear: 2025Título: Pequeños ritos (díptico)Autora: Juan Esteban ZapataTécnica: Óleo sobre papelDimensiones: 70 × 50 cmAño: 2025Título: Pequenos rituais (díptico)Autora: Juan Esteban ZapataTécnica: Óleo sobre papelDimensões: 70 × 50 cmAno: 202
Pequenos rituais (díptico)
No full textTitle: Small Rituals (diptych)Author: Juan Esteban ZapataTechnique: Oil on paperDimensions: 70 × 50 cmYear: 2025Título: Pequeños ritos (díptico)Autora: Juan Esteban ZapataTécnica: Óleo sobre papelDimensiones: 70 × 50 cmAño: 2025Título: Pequenos rituais (díptico)Autora: Juan Esteban ZapataTécnica: Óleo sobre papelDimensões: 70 × 50 cmAno: 202
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