Sungdo Ha

Dental Training System using Multi-modal Interface

AbstractWe present a dental training system through multi-modal interface such as visual, auditory and haptic sensations. The system allows dental students to learn dental procedures and handling dental instruments with realistic feelings and evaluate their performance. To implement this system, it requires stable and fast haptic rendering algorithm, visual model deformation techniques on the virtual tooth being deformed, and sound rendering to simulate contact sound between the virtualtool and tooth. We enhance previous volume-based haptic modeling systems for haptic dental simulation. Collision detection and force computation are implemented on an offset surface rather than the implicit surface to simulate physical interactions between the virtual dental tool and tooth model. To bridge the gap between fast haptic process (1 KHz) and much slower visual update frequency (~30Hz), the system generates intermediate implicit surfaces between two consecutive physical models being deformed resulting in smooth f...

An electronic traveler aid for the blind using multiple range sensors

This paper presents a novel electronic travel aid, called iSONIC, which can help a visually impaired person walk around more safely. Attached to a conventional white cane, the iSONIC detects obstacles at head-height that cannot be covered by a traditional cane and gives warnings in the forms of vibration or sound to avoid dangerous situations. We developed an algorithm to restrict the sensing range to reduce confusing and unnecessary detections and a method to remove the sensing errors due to the impact of ground tapping. In addition to obstacle detection, the iSONIC give information of object color and the environmental brightness when the user wants to know.

Managing Design Knowledge: Active Document System

Abstract Sharing design knowledge within a company is critical to retain market competitiveness, especially when the company develops a family of products. The goal of this study is to develop a Web-based design knowledge management system, named Active Document System, that helps designers retrieve critical design information promptly. In order to manage unstructured knowledge such as design know-how systematically, Active Document System classifies design knowledge in accordance with product functions as well as product structures. This paper explains Active Document System and a method to deploy the product function. The concept is implemented and applied to the management of design knowledge for the refrigerator design process.

An electronic aid for a visually impaired person using an ultrasonic sensor

This paper presents an electronic device, called SmartWand, which can help a visually impaired person walk around more safely. Attached to a conventional white cane, the SmartWand detects obstacles that cannot be detected by a traditional cane and gives warnings in the forms of vibration or sound. In addition to obstacle detection, it also provides functions to detect colors of objects and the brightness of surroundings.

Context-aware communication support system with pictographic cards

We present a context-aware pictographic display system that facilitates the search for communication cards that bear some relation to the location and goal of the user. The system consists of a server and a mobile device: the server searches for relevant cards on the basis of the context, and then prioritizes them in terms of their relatedness; the mobile device displays pictographic cards according to the priority. This system can help people who have speech-language difficulties by reducing the searching time and difficulties, when the user wants to find the pictographic cards.

Design Knowledge Management with Reconstructible Structure

Abstract Critical Issue In knowledge management Is how to Increase the adaptability of knowledge as well as how to reconstruct similar knowledge. In order to construct the design knowledge for new products, designers need to reconstruct the design knowledge with new relationships. A new design knowledge expression method, Design DNA, Is proposed In this work far representing complicated relationships of design knowledge. Design DNA facilitates rearrangement of design knowledge and promotes the flexibility of knowledge structure. Design DNA Is based on Layout-oriented domain knowledge and Function-oriented domain knowledge, which enables to generate new design knowledge that will result in new part geometries for given constraints on the part functions.

Process and Location-Aware Information Service System for the Disabled and the Elderly

This paper presents a context-aware information service system for people with disabilities and for older adults. The system guides users who have difficulties in performing complicated tasks or finding paths at public places such as hospitals or government offices. The system is composed of sensor networks and a local information system which work together to gather the location and the process information, a user device which directly provides guidance to the user, and an information service server which understands the user context and provides guide contents.

An OWL-Based Knowledge Model for Combined-Process-and-Location Aware Service

This paper presents a knowledge model for spatiotemporal context awareness. The knowledge model is designed to understand user goals and to guide users who perform complicated tasks involving several routes, such as tasks at a hospital. An information system should be able to consider both the location and process context to provide relevant guidance regarding tasks, their location, and their process, as location and process information are collaboratively associated. A service that is both process- and- location-aware is considered, and a knowledge model that represents the semantics of the proposed process- and- location-aware service is given.

Design of OWL Ontology in R&D Project Management Meeting

An ontology as the core technology of semantic Web is an explicit specification of a conceptualization. The ontology has been proposed as an important tool for expressing real world knowledge by conceptual modeling, and provides a basis for effectively managing the knowledge. In this work, an ontology for R&D project management meeting is designed and established. Various meetings and related data accompanied in the progress of R&D projects are to be managed for successful projects. Information sharing and data retrieval are difficult for meeting attendants, and management for meeting data is not systematic. An ontology is designed and implemented by analyzing and classifying the meeting and related data in R&D project meeting systematically. Thereafter this can be applied to meeting management and service provision of an intelligent meeting examples

Tolerance Representation Scheme for Integrated Cutting Process & Inspection Planning

In order to improve machining quality of parts, tolerance information should be easily exchanged among product designers, process planners, operators and inspectors. The tolerance information exchange is not yet accomplished since common formats for tolerance information management are being under development. So far the tolerance is recorded as text information in the drawings of commercial 3D CAD systems, which requires human interpretation for its use in cutting process planning and inspection planning processes.