Jorge Wagner

Jorge Wagner
Universidade Federal do Rio Grande do Sul | UFRGS · Departamento de Informática Aplicada

Master of Science
Ph.D. Student in Computer Science at the Federal University of Rio Grande do Sul

About

18
Publications
9,636
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
213
Citations
Introduction
Ph.D. Candidate in Computer Science at the Federal University of Rio Grande do Sul (UFRGS), Brazil, researching guidelines for efficient 3D data exploration with Immersive Analytics under the supervision of Prof. Luciana Nedel and Prof. Wolfgang Stuerzlinger. Currently a Fulbright Visiting Student Researcher at New York University, under the supervision of Prof. Claudio Silva, and a Ph.D. Fellow at Microsoft Research.

Publications

Publications (18)
Article
[Video: https://vimeo.com/269773335] 3D representations are potentially useful under many circumstances, but suffer from long known perception and interaction challenges. Current immersive technologies, which combine stereoscopic displays and natural interaction, are being progressively seen as an opportunity to tackle this issue, but new guideli...
Conference Paper
Full-text available
The use of novel displays and interaction resources to support immersive data visualization and improve analytical reasoning is a research trend in the information visualization community. In this work, we evaluate the use of an HMD-based environment for the exploration of multidimensional data, represented in 3D scatterplots as a result of dimensi...
Conference Paper
Full-text available
In this work, we present the construction process of a large Web corpus for Brazilian Portuguese, aiming to achieve a size comparable to the state of the art in other languages. We also discuss our updated sentence-level approach for the strict removal of duplicated content. Following the pipeline methodology, more than 60 million pages were crawle...
Conference Paper
Full-text available
The availability of annotated corpora for research in the area of Readability Assessment is still very limited. On the other hand, the Web is increasingly being used by researchers as a source of written content to build very large and rich corpora, in the Web as Corpus (WaC) initiative. This paper proposes a framework for automatic generation of l...
Conference Paper
Full-text available
This work presents a framework for the automatic construction of large Web corpora classified by readability level. We compare different Machine Learning classifiers for the task of readabil-ity assessment focusing on Portuguese and English texts, analysing the impact of variables like the feature inventory used in the resulting corpus. In a compar...
Article
In this work, we evaluate two standard interaction techniques for Immersive Analytics environments: virtual hands, with actions such as grabbing and stretching, and virtual ray pointers, with actions assigned to controller buttons. We also consider a third option: seamlessly integrating both modes and allowing the user to alternate between them wit...
Preprint
The design space for user interfaces for Immersive Analytics applications is vast. Designers can combine navigation and manipulation to enable data exploration with ego-or exocentric views, have the user operate at different scales, or use different forms of navigation with varying levels of physical movement. This freedom results in a multitude of...
Preprint
In this work, we evaluate two standard interaction techniques for Immersive Analytics environments: virtual hands, with actions such as grabbing and stretching, and virtual ray pointers, with actions assigned to controller buttons. We also consider a third option: seamlessly integrating both modes and allowing the user to alternate between them wit...
Article
Full-text available
Um dos maiores desafios na computação atualmente é extrair informações relevantes de conjuntos de dados cada vez maiores. Técnicas de visualização de dados nos permitem aplicar as habilidades humanas de compreensão visual e nosso conhecimento do domínio a este processo. Nossa hipótese é que ambientes imersivos e estereoscópicos de Realidade Virtual...
Conference Paper
One of the biggest challenges in computing nowadays is to extract relevant information from ever-growing datasets. Applications such as smart cities, transportation planning, control of epidemics, and citizen engagement in public governance can heavily benefit from the analysis of large volumes of urban data. Despite advances in AI and Data Mining,...
Article
Full-text available
A Space-Time Cube enables analysts to clearly observe spatio-temporal features in movement trajectory datasets in geovisualization. However, its general usability is impacted by a lack of depth cues, a reported steep learning curve, and the requirement for efficient 3D navigation. In this work, we investigate a Space-Time Cube in the Immersive Anal...
Preprint
Full-text available
A Space-Time Cube enables analysts to clearly observe spatio-temporal features in movement trajectory datasets in geovisualization. However, its general usability is impacted by a lack of depth cues, a reported steep learning curve, and the requirement for efficient 3D navigation. In this work, we investigate a Space-Time Cube in the Immersive Anal...
Conference Paper
This dissertation investigates the use of Virtual Reality for the exploration of multidimensional data represented as 3D scatterplots. After an initial user study indicated that an immersive environment required less effort to find information and less navigation, but resulted in inefficient times and frequent user discomfort, we proposed and evalu...
Conference Paper
In this work, we evaluate the use of an HMD-based Immersive Analytics approach to explore multidimensional data. Our main hypothesis is that the benefits obtained, such as a more natural interaction and an egocentric view of the data, besides the stereopsis, will be able to compensate the typical downsides of three dimensional visualization, enabli...

Network

Cited By

Projects

Projects (3)
Project
The VirtualDesk metaphor is an opportunity for more comfortable and efficient immersive data exploration, using tangible interaction with the analyst's physical work desk and embodied manipulation of mid-air data representations.
Project
Numerous positive results of the application of immersive virtual environments for the exploration of scientific spatial datasets have been presented. Three-dimensional representations of abstract information, however, are also beneficial under some circunstances, and have been little explored in this context so far. In this project, we investigate interaction metaphors that allow them to benefit from Immersive Analytics as well.