• KSII Transactions on Internet and Information Systems (TIIS)
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• v.17 no.11
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• pp.3064-3082
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• 2023

During the last decade, several Electronic Orientation Aids devices have been proposed to solve the autonomy problems of visually impaired people. When hearing is considered the primary sense for Visually Impaired people (VI) and it is generally loaded with the environment, the use of tactile sense can be considered a solution to transmit directional information. This paper presents a new wearable haptic system based on four motors implemented in shoes, while six directions can be played. This study aims to introduce an interface design and investigate an appropriate means of spatial information delivery through haptic sense. The first experiment of the proposed system was performed with 15 users in an indoor environment. The results showed that the users were able to recognize, with high accuracy, the directions displayed on their feet. The second experiment was conducted in an outdoor environment with five blindfolded users who were guided along 120 meters. The users, guided only by the haptic system, successfully reached their destinations. The potential of tactile-foot stimulation to help VI understand Electronic Orientation Aids (EOA) instructions was discussed, and future challenges were defined.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2008.06a
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• pp.37-38
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• 2008

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.9 no.5
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• pp.93-99
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• 2009

The wearable computer that can understand the context of human life and intelligently communicate with various electronic media in ubiquitous computing environment would be very useful as an assistant for humans. In this paper we introduce an intelligent wearable assistance suite. The proposed wearable suite can interact with both humans and electronic media in ubiquitous computing environment. The developed system can sense the interactive electronic media that a user wants to use and also communicate with it. By utilizing these interaction capabilities, it intermediates between each media and the user and offers a friendlier interface to the user who wears this system. We also show the usages of the proposed system by demonstrating its interaction with the interactive electronic media in ubiquitous computing environment.

• 한국HCI학회:학술대회논문집
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• 2008.02b
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• pp.329-333
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• 2008

현재 소방관들은 주로 무전기로 다른 소방관이나 중앙 지휘관과 통신을 하고, 필요 정보를 취득 혹은 공유 하면서 소방 활동을 수행 하고 있다. 소방 현장에서는 여러 가지 위험이 존재 하고 이를 극복하기 위해서 많은 정보를 필요로 할 때가 많지만, 이를 미리 모두 숙지 하고 있거나, 동적으로 변화 하는 상황을 무전기를 통하여 취득하고 이해 하기는 쉽지 않다. 이러한 어려운 점을 해소 하기 위하여 웨어러블 컴퓨터를 이용한다면 소방 활동을 도울 수 있을 것이며, 이에 적합한 웨어러블 인터페이스가 디자인 되어야 한다. 이 논문에서는 시나리오에 기반 한 인터액션 모델링, 화재 현장 및 소방 상황에서의 인간공학적 제한 조건, 사용자 설문조사, 그리고 인터페이스 패턴을 기반으로 소방 활동을 효과적으로 도울 수 있는 인터페이스 디자인 및 개발에 대하여 설명하고자 한다.

• 한국HCI학회:학술대회논문집
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• 2006.02b
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• pp.112-117
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• 2006

웨어러블 컴퓨터는 사용자를 중심으로 의복과 기술이 결합된 기기로서 직관적이며 유연한 인터페이스가 요구된다. 현재 직관적인 입력방식으로 음성인식과 동작인식에 대한 연구가 활발하게 진행되고 있다. 동작인식의 경우 손동작을 이용한 장갑형태가 가장 많으며, 대부분 사용자 행동의 의미를 고려하지 않은 인위적인 제스처로 학습을 필요로 한다. 본 연구에서는 사용자가 일상적으로 하는 행동에서 의미를 추출하고, 웨어러블 컴퓨터의 인터페이스로서 적용가능성을 보고자 한다. 행동은 자극에 대한 신체의 움직임이다. 문헌을 통하여 신체의 움직임에 대한 66개의 동사를 추출하고 구체적인 움직임에 구문조사를 실시하였다. 조사된 구문에 대한 상황과 의미를 조사한 결과 행동은 의미에 따라 감정표현, 의사전달, 정보교류, 자기제어, 기기제어, 무의식적, 의례적의 7가지로 분류할 수 있었다. 그 중 의사소통과 대상을 제어하기 위한 행동을 중심으로 접근하였다. 행동의 의미와 현재 사용되고 있는 UI의 의미를 비교하여 인터페이스를 대응시켜 보았다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.18 no.5
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• pp.1087-1095
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• 2014

A recent major development in computer technology is the advent of the wearable computer system that is based on human-centric interface technology trends and ubiquitous computing environments. Wearable computer systems can use the wireless universal serial bus (WUSB) that refers to USB technology that is merged with WiMedia PHY/MAC technical specifications. In this paper, we focus on an integrated system of the wireless USB over the IEEE 802.15.6 wireless body area networks (WBAN) for wireless wearable computer systems supporting U-health services. And a communication structure that can differentiate QoS of U-health WBAN and WUSB traffic with different priorities is proposed for WUSB over IEEE 802.15.6 hierarchical protocol. In our proposal and performance evaluation, throughputs of U-health WBAN and WUSB traffic are analyzed under single and multiple QoS classes to evaluate the effectiveness of proposed QoS differentiating structure in WUSB over IEEE 802.15.6.

• The Journal of the Korea institute of electronic communication sciences
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• v.13 no.1
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• pp.153-162
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• 2018

The importance of energy harvesting technique is increasing due to the elevated level of demand for sustainable power sources for wearable device applications. In this study, we developed an Energy Harvesting wearable Platform(EH-P) architecture which is used in the design of a multi-energy source based on TENG. The proposed switching circuit produces power with higher current at lower voltage from energy harvesting sources with lower current at higher voltage. This can powers microcontrollers for a short period of time by using PV and TENG complementarily placed under hard conditions for the sources such as indoors. As a result, the whole interface circuit is completely self-powered with this makes it possible to run of sensing on a Wearable device platform. It was possible to increase the wearable device life time by supplying more than 29% of the power consumption to wearable devices. The results presented in this paper show the potential of multi-energy harvesting platform for use in wearable harvesting applications, provide a means of choosing the energy harvesting source.

• 제어로봇시스템학회:학술대회논문집
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• 2002.10a
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• pp.37.5-37
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• 2002

$\textbullet$ Wearable I/O Devices relieve the restriction of working space to the worker. $\textbullet$ And They permit very active work achievement to the worker. $\textbullet$ But, current Wearable I/O Devices still have some controversial points. $\textbullet$ The worker needs serie system operations to wear and take off devices. $\textbullet$ Also, it is not easy to change any device which is currently used when the worker uses some devices. $\textbullet$ So, we propose the Compact Wireless Communication Module to solve these problem. $\textbullet$ For that purpose, we implemented the proposed module, and proved the efficiency and convenience.

• Journal of Sensor Science and Technology
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• v.31 no.2
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• pp.79-84
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• 2022

Self-powered sensors play an important role in everyday life, and they cover a wide range of topics. These sensors are meant to measure the amount of relevant motion and transform the biomechanical activities into electrical signals using triboelectric nanogenerators (TENGs) since they are sensitive to external stimuli such as pressure, temperature, wetness, and motion. The present advancement of TENGs-based self-powered wearable, implantable, and patchable sensors for healthcare monitoring, human body motion, and medication delivery systems was carefully emphasized in this study. The use of TENG technology to generate electrical energy in real-time using self-powered sensors has been the topic of considerable research among various leading scholars. TENGs have been used in a variety of applications, including biomedical and healthcare physical sensors, wearable devices, biomedical, human-machine interface, chemical and environmental monitoring, smart traffic, smart cities, robotics, and fiber and fabric sensors, among others, as efficient mechanical-to-electric energy conversion technologies. In this evaluation, the progress accomplished by TENG in several areas is extensively reviewed. There will be a discussion on the future of self-powered sensors.

• Journal of the Ergonomics Society of Korea
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• v.30 no.1
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• pp.229-235
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• 2011

Objective: Making a new ergonomic interface system based on camera vision system, which helps the handicapped in home environment. Background: Enabling the handicapped to manipulate the consumer electronics by the proposed interface system. Method: A wearable device for capturing the eye image using a near-infrared(NIR) camera and illuminators is proposed for tracking eye gaze position(Heo et al., 2011). A frontal viewing camera is attached to the wearable device, which can recognize the consumer electronics to be controlled(Heo et al., 2011). And the amount of user's eye fatigue can be measured based on eye blink rate, and in case that the user's fatigue exceeds in the predetermined level, the proposed system can automatically change the mode of gaze based interface into that of manual selection. Results: The experimental results showed that the gaze estimation error of the proposed method was 1.98 degrees with the successful recognition of the object by the frontal viewing camera(Heo et al., 2011). Conclusion: We made a new ergonomic interface system based on gaze tracking and object recognition Application: The proposed system can be used for helping the handicapped in home environment.