Joong-Ho Lee

Gesture-Based Interface for Connection and Control of Multi-device in a Tabletop Display Environment

In this paper, we propose a gesture-based interface for connection and control of multiple devices in a ubiquitous computing environment. With simple selection and pointing gestures, users can easily control connections between multiple devices as well as manage information or data between them. Based on a robust gesture recognition algorithm and a virtual network computing technology, we implemented this concept in an intelligent meeting room consisting of a tabletop, interactive wall displays, and other popular devices such as laptops and mobile devices. We also performed a preliminary user study in this environment, and the results show the usability of the suggested interface.

Wave touch: educational game on interactive tabletop with water simulation

In this paper, we present an underwater exploration game called Wave Touch, designed specifically for a category of devices known as, interactive tabletops. The game provides users with a fun way to learn about important historical artifacts. An emphasis is placed on making Wave Touch entertaining to the user, a goal which is satisfied through the use of interactive tabletops and realistic water simulation. We also present the techniques we used to enable real-time water simulation effects in the game.

Wave seeds

This paper proposes a new algorithm to simulate fluid surface waves for real-time graphics applications. The external forces and object-interactions are described by a set of wave seeds. A wave seed is a physically-based wave model, which contains all information needed to present the waves. The wave seeds are stored into a texture, and the shader programs evaluate each wave seed for the sub-area of the height field affected by the wave seed. The evaluation results are accumulated into the height field, and finally the height field is rendered. The proposed algorithm implemented completely within GPU is quite fast, extremely memory-efficient, and is unconditionally stable.

A development of graphical interface for decision making process including real-time consistency evaluation

Decision making problems are often imprecise and changeable because of potential inconsistency in human thinking. Although AHP gives a desirable guide to the reasonable solution via consistency ratio, there is still possibility of containing inconsistence during process. Therefore, an important step in many applications of decision making problems is to perform a consistency analysis in real-time. We introduce a new method of priority setting in decision making processes, which is implemented as an interactive and convenient graphical interface of the decision making problem. It is designed to support the real-time consistency evaluation. The conventional AHP does not provide graphical user interface and is impossible to monitor the interim findings in the middle of process, and is difficult to predict the difference of results when changing pair-wise comparison conditions, and is difficult to monitor the consistency of human judgment during operation. The proposed real-time calculation algorithm and visualization method is developed to realize effective and reliable decision making environment, and is verified its merit through the exemplary case. In addition, we propose new algorithm of evaluating consistency level. The rationality tension is proposed as a new index for evaluating a real-time consistency analysis with interactive graphical user interface. It is desirable for a system to provide fast and visible information of consistency in decision making processes.

Notice of Violation of IEEE Publication Principles A Bio-inspired Approach for Autonomous Service Components Configuration in Dynamic Environments

Ubiquitous computing environments require dynamic adaptable application and network services because of their need to adapt to rapidly change context. To support such environments, management systems need to dynamically adapt service execution and behavior. This paper explores an approach to make service plans more adaptable to changing context prior to as well as during execution time without re-planning. This paper proposes a bio-inspired approach to describe the adaptive behavior of a particular service and the formation of composite components representing the constituent services. The paper depicts the policies to be used as rules by which adaptive behaviors can be specified prior to, or even during, execution. For a composite service, these policies are refined and applied to its constituent services, thus facilitating automatic refinement of high level policies to lower level policies executable appropriate constituent service. The paper presents a case study to illustrate the outlined approach and identify the strengths and challenges in applying this approach