Dongpyo Hong

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In this paper, we discuss a novel perspective on ontologybased context modelling that makes it easy to combine context models and contextual reasoning mechanisms. On the context modelling side, we outline our idea of a user-centric context model based on the six fundamental context parameters of who, when, where, what, how, and why (5W1H); on the contextual(More)
In this paper, we propose a toolkit, wear-UCAM, which can support mobile user interactions in smart environments through utilizing user’s context. With the rapid developments of ubiquitous computing and its relevant technologies, the interest in context-aware applications for mobile/wearable computing also becomes popular in both academic and industrial(More)
The faithful determination of the concentration and viability of yeast cells is important for biological research as well as industry. To this end, it is important to develop an automated cell counting algorithm that can provide not only fast but also accurate and precise measurement of yeast cells. With the proposed method, we measured the precision of(More)
The first article reports on context-sensitive augmented-reality research presented at the 2007 International Symposium on Ubiquitous Virtual Reality. This student-organized event explored the use of contextual information, design principles, and effective user evaluation for developing AR applications for ubiquitous computing environments. The second(More)
Ontologies have been suggested as a means to ensure interoperability of Ambient Intelligence (AmI) applications as well as effectiveness within different sensory environments. We introduce a new logical language specifically tailored to the task of ontology design for AmI applications. This language has known advantages of description logics, namely a(More)
In this paper, we propose a seamless user interaction framework in ubiquitous computing environment. With the proliferation of ubiquitous computing concept in IT, technologies of context-awareness become a key factor of human-computer interaction. In addition, the concept of human-computer interaction is expanded from computer itself to content or(More)
This article proposes a 3-dimensional (3D) vision-based ambient user interface as an interaction metaphor that exploits a user’s personal space and its dynamic gestures. In human–computer interaction, to provide natural interactions with a system, a user interface should not be a bulky or complicated device. In this regard, the proposed ambient user(More)
In this paper, we propose wear-UCAM, which is a toolkit for Unified Context-aware Application Model in wearable computing. As the rapid developments of mobile technologies and relevant technologies, the interests in wearable computing also become popular in both academic and industrial fields. Unfortunately there are few research activities on the(More)
In this paper, we propose a real-time gesture tracking technique for the personalized user interface exploiting non-contact 3D vision technique. We first separate a user of interest as precisely as possible from the acquired natural background scenes and then estimate the disparity of the segmented user with a multi-view camera. Given the depth information(More)