Bianchi Serique Meiguins

PRISMA - A Multidimensional Information Visualization Tool Using Multiple Coordinated Views

Information visualization techniques have been successfully used to build visual and interactive analysis of data and data relationships. However, dimensionality, volume and diversity make it difficult for a single technique to completely solve the problem. Information visualization tools that support multiple coordinated views allow the user to better understand the dataset by providing different perspectives based on the same set of data items. These tools support the correlation between data views and the coordinated real-time interaction mechanisms. The goal of this paper is to present the PRISMA information visualization tool that explores the use of multiple coordinated views. PRISMA provides usability, portability and extensibility. Initial usability essays are discussed.

Coordinated and Multiple Views in Augmented Reality Environment

The paper presents a prototype that implements multiple coordinated views to information visualization in augmented reality environments. Augmented reality provides more intuitive and easy interaction. It also reduces the limitations of visualization and enhances the collaborative aspect. A modified version of ARToolKit has been used to create the augmented environment, and the 3D scatter plot technique has been developed to represent the multiple views of data. The coordination between views supported dynamic queries, data selection, and the configuration of views and of the detail on demand feature. This paper also reproduces literature usability tests based on tasks in order to analyze the viability to implement multiple coordinated views in augmented environments for information visualization.

A Tourism Information Analysis Tool for Mobile Devices

This paper presents a data analysis tool for mobile devices. Coordinated views are used to enhance the users perception over data and diminish the difficulties caused by the lack of resources these mobiles present, specially when it comes to display size. The tool was totally developed in JavaME, what guarantees portability, scalability and code reuse. It presents two visualization techniques, implemented and coordinated with filters, scatterplot graph with georeferenced maps and treemap. Besides, preliminary usability tests were performed with users.

Multiple coordinated views supporting visual analytics

This paper proposes the use of multiple coordinated views to support visual analytics. The Information Visualization tool PRISMA includes the implementation of three coordinated visualization techniques (treemap, parallel coordinates and scatterplot) and other auxiliary charts. The coordination is supported by filter, brushing, visual representation and other mechanisms. The mini --challenge 4 (Evacuation Traces) from IEEE VAST 2008 Challenge was used as a case study on this paper.

An Information Visualization Tool with Multiple Coordinated Views for Network Traffic Analysis

Information Visualization techniques have been successfully used to build visual and interactive analysis of data and data relationships. One of its possible areas of application is computer network monitoring and traffic analysis. The analysis of the internal behavior of a company with high demand for Internet services helps to determine if the company is competing with its own clients over the available resources for online transactions, or event putting client information in risk. PRISMA, a tool with multiple coordinated data views has been analyzed to find patterns involving transactions against the company security policies. The goal is to suggest changes to improve the quality of service.

Using Augmented Reality for Multidimensional Data Visualization

This paper presents a prototype for information visualization in an augmented reality environment. The prototype allows users to perform common tasks in desktop information visualization tools, such as data dynamic filters, attribute selection, semantic zoom and details on demand. Such tasks are seldom available in AR environments. We used a customized version of ARToolKit, a software tool that allows the insertion of virtual objects in real environments through cards with marks. The interactive controls as well as the data visualization are projected to the user and manipulated through these cards

Guidelines for Graphical User Interface Design in Mobile Augmented Reality Applications

The technological advancement of mobile devices allowed the entry of innovative technologies in users’ daily lives, due to miniaturization and advancement of sensors, cameras and computer resources. These technologies make it possible to increase the user’s interaction and perception about places and objects around him, allowing, for example, the use of augmented reality. However, this opportunity presents new challenges, such as application design and development, aspects to this new context of ubiquitous devices, heterogeneity of mobile devices, and how the user interacts with these applications. Thus, this paper aims to present the results of Mobile Augmented Reality application usability evaluation, identifying a list of problems in the application Graphical User Interface and propose some guidelines for building Graphical User Interfaces to avoid these problems. The chosen usability evaluation is the Think Aloud protocol, which was performed with 20 participants in the Mobile Augmented Reality application named ARguide.

Design decisions for a Brazilian t-commerce application

Digital TV interactivity implies a great potential for social and digital inclusion, especially in a country like Brazil, where 95% of households have at least one TV. Due to the importance of Interactive Digital TV in this scenario, it is necessary not only to provide new applications to support services on TV, but also to evaluate the technological challenges and development practices, in order to provide viewers suitable interactivity considering the environment limitations. This paper presents the design process of a t-commerce application for the Brazilian iDTV middleware, the theories that based the development and an analysis of its appliance in a real scenario test.

Collaborative Augmented Reality Application for Information Visualization Support

In todays information systems, strategies for decision making and accurate results in a short time are crucial in many knowledge areas of industry, economic, medical etc.. To support this demand to store and interpret relevant information, the area of information visualization coupled with several others, such as intelligent systems and data mining, is increasingly taking place in academic research and market. Aiming to increase to level of interaction and accurate results, this article presents a collaborative augmented reality application for information visualization support.

Categorizing Issues in Mid-air InfoVis Interaction

This paper presents a starting study on InfoVis interaction through mid-air gestures, using a vision based interaction device, the Leap Motion. We present the user tests conducted and the results gathered, using a 3D Scatterplot as visualization technique. These tests aim in identify and categorize issues that can compromise InfoVis mid-air gestural interaction as a whole, not focusing on the design of the developed tool. The test tasks and results are exposed and the issues found are categorized in Boundary Awareness, Granularity and Collision and Depth Perception.