Nikolas Jorge S. Carneiro

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.

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.

Exploring, Comparing and Coordinating Multiple Datasets in an Information Visualization Tool

The goal of this paper is to present an information visualization application capable of opening and coordinating information over two or more datasets. We have chosen this approach to address some of the limitations of various applications. Also, the application uses multiple coordinated views and multiple simultaneous datasets. We highlight the application layout configuration by the user, including the flexibility to specify the number of data views and to associate different datasets for each visualization technique. Diferente approaches are suggested of how to deal and interact with multiple datasets.

PRISMA Mobile: An Information Visualization Tool for Tablets

The goal of this paper is to present PRISMA Mobile, an information visualization tool for android-based tablets. The application is based on a client-server model where the client uses as few resources as possible in order to preserve memory, battery and other device resources. To get better profit from the device, the tool uses the treemap technique coupled to other IV resources, as zoom, filters and details-on-demand, to improve user cognitive capabilities when analyzing data.

PRISMA-MDE - Distributed and Scalable Environment for Multiple Views of Data Coordinates

Multi-display environment (MDE) has evolved in recent years; however, the adjustment of common visualization system to MDEs poses several challenges. This paper describes an information visualization (IV) tool for a distributed and scalable environment with coordinated multiple views of data, which simulates an extended desktop across multi-display. This work is limited to the use of three monitors. This document presents satisfactory results of preliminary tests of usability. Performance tests showed an IV pipeline is more optimized than the common visualization tool.

A Visualization Interface Applied in the Brazilian T-commerce Scenario

With the spread of sales in electronic commerce and the popularization of interactive devices for digital television, grows the demand for applications that supports services over this platform, considering that television devices are present in 95% of brazilian households. In order to supply this demand, this work proposes a visualization interface for visual analysis of products in electronic commerce, through the Interactive Digital TV, the t-commerce.

Evaluation of Information Visualization Interaction Techniques Using Gestures and Widgets in 3D Environments

This paper presents the results of usability evaluation of an Information Visualization tool with touchless gestural commands. The tool has well-known visualizations tasks implemented in itself, allowing users to interact on a 3D scatterplot visualization technique. The chosen usability evaluation was the Think Aloud protocol, together with questionnaires conducted by an interviewer, both of them performed with five participants in a controlled environment.

A Low Level Evaluation of Head-Tracker and Speech Commands Interactions in Information Visualization Tasks

This paper presents results of head tracker and speech commands interaction evaluation in information visualization context at low level task taxonomy. The head tracker is used to move a pointer and the voice commands to perform actions. In the evaluation, we used 20 public information visualization techniques, 62 simple tasks (aiming low-level interactions), and 10 participants performed all tasks. The evaluation shows results about user performance (UP) and user experience (UE) by visualization and interaction taxonomies. Finally, we highlight some good practices suggestions for design of this type of interaction.

A Review of Ways and Strategies on How to Collaborate in Information Visualization Applications.

Design and develop collaborative methods in information visualization are a current challenge, hence understand, identify and define the current progress of developed methods to collaborate in information visualization are important. The aim of this work is to review the ways and strategies of how to collaborate in information visualization applications. We surveyed published works that present applications that implements collaborative information visualization techniques and methods. We present a micro level category of identified ways of how the InfoVis applications implements collaboration.