• Proceedings of the Korean Society of Precision Engineering Conference
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• 2009.06a
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• pp.73-74
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• 2009

• IEMEK Journal of Embedded Systems and Applications
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• v.10 no.2
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• pp.109-117
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• 2015

In this paper, we have developed smart-phone App(application) for screening Dementia using bionic sensors, urine test and questionnaire. Since small amounts of urinary protein strongly predict faster cognitive decline in the elderly, smart-phone based urinalysis is adopted to screen dementia more accurately as well as bionic sensors such as $SpO_2$ and HRV(Heart Rate Variability). Firstly, DI(Dementia Index) is calculated from urinalysis, two bionic sensors and electric questionnaire, and then compared to the threshold from clinical test. Finally the results of Dementia screening is shown in your smart-phone and useful information to prevent or relieve Dementia is also given. We performed simple testing on persons aged over 60 and found out the proposed application can be useful devices for screening Dementia easily and quickly.

• Journal of the Korean Society for Precision Engineering
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• v.26 no.7
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• pp.15-21
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• 2009

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.14 no.4
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• pp.141-147
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• 2014

With the rapid development of major functions in a smartphone, many applications interacting with a smartphone are introduced and mobile applications converged with various related technologies are announced and rapidly disseminated recently. In this paper, we propose the design of a smart mobile application operated with devices like sensors in order to utilize various functions of the smartphone effectively. The mobile application proposed in this paper uses the bluetooth module of the smartphone, composes the wireless ad hoc network with various sensors around us, and collects bionic context information of the user in real time. The smart application designed and implemented in this paper is the sensor based healthy diet application that can fulfill healthy diet program by reflecting the user's sensed bionic context data in real time.

• Journal of rehabilitation welfare engineering & assistive technology
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• v.11 no.1
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• pp.81-89
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• 2017

In this paper, we propose a gait pattern recognition method for intelligent prosthesis that enables walking in various environments of femoral amputees. The proposed gait mode changing method is a single sensor based algorithm which can discriminate gait surface and gait phase using only strain gauges sensor, and it is designed to simplify the algorithm based on multiple sensors of existing intelligent prosthesis and to reduce cost of prosthesis system. For the recognition algorithm, we analyzed characteristics of the ground reaction force generated during gait of normal person and defined gait step segmentation and gait detection condition, A gait analyzer was constructed for the gait experiment in the environment similar to the femoral amputee. The validity of the paper was verified through the defined detection conditions and fabricated instruments. The accuracy of the algorithm based on the single sensor was 95%. Based on the proposed single sensor-based algorithm, it is considered that the intelligent prosthesis system can be made inexpensive, and the user can directly grasp the state of the walking surface and shift the walking mode. It is confirmed that it is possible to change the automatic walking mode to switch the walking mode that is suitable for the walking mode.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.12
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• pp.6013-6021
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• 2012

Although there are many patients who suffer from cold hypersensitivity and have a difficult time in living daily lives due to feeling cold at room temperature, it is about true that an accurate diagnostic method and an effective remedy for a cold hypersensitivity have not been developed yet. Therefore, in order to develop traditional medicine equipment for cold hypersensitivity, we have designed new oxygen chamber system which can diagnose cold hypersensitivity with multiple bionic sensors and supply a patient optimum amount of oxygen adaptively to the extent of their illness. In particular, diverging from conventional diagnosis based on the experience of doctor and subjective statements of patient, we introduced accurate method for diagnosis in comparing between output of multiple sensors and threshold derived from clinical trials. After all, the proposed oxygen chamber system will contribute to achieving scientific evidence and manufacturing of korean traditional medicine.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.3 no.4
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• pp.227-232
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• 2002

Electronic Travel Aids (ETA) developed for the blind such as sonicguide, mowat sensor and bionic C-5 laser cane have many problems like technical deficiency and high cost. Moreover, these systems have need for more training to perceive obstacle around. Therefore, In this study, we studied the blind's obstacle perception characteristics by human auditory sense, and development of ultrasonic ETA which have more simple usage, low cost and immediate usableness than present ETAs.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2009.11a
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• pp.33-33
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• 2009

Silicon nano-structures have great potential in bionic sensor applications. Atomic force microscopy (AFM) anodic oxidation have many advantages for the nanostructure fabrication, such as simple process in atmosphere at room temperature, compatibility with conventional Si process. In this work, we fabricated simple FET structures with channel width W~ 10nm (nanowire) and $1{\mu}m$ (nano-ribbon) on ~10, 20 and 100nm-thinned silicon-on-insulator (SOI) wafers in order to investigate the surface effect on the transport characteristics of nano-channel. For further quantitative analysis, we carried out the 2D numerical simulations to investigate the effect of channel surface states on the carrier distribution behavior inside the channel. The simulated 2D cross-sectional structures of fabricated devices had channel heights of H ~ 10, 20, and 100nm, widths of L ~ $1{\mu}m$ and 10nm respectively, where we simultaneously varied the channel surface charge density from $1{\times}10^{-9}$ to $1{\times}10^{-7}C/cm2$. It has been shown that the side-wall charge of nanowire channel mainly affect the I-V characteristics and this was confirmed by the 2D numerical simulations.

• KSBB Journal
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• v.26 no.5
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• pp.412-416
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• 2011

The conventional monitoring system for water pollution measurement is quite simple and independent and it has a lot of draw backs such as cost, installation, etc. So, in this paper, we have measured the water pollution system through a bacterial species, photobacterium phosphoreum. A novel integrated monitoring system technology has been developed which could easily dictate and analyze the major water pollutants and its surrounding environment in an accurate way. The system constitutes of bionic technology, information technology and environmental engineering technology. As a result, integrated monitoring system can observe the water pollution and various water environment of the whole country. Also, through the sensors of USN, Zigbee, RFID and middle ware, which can provide service and construct service platform, a properly standardized plan with remarkable service platform has been established through this investigation.

• Journal of Convergence for Information Technology
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• v.7 no.5
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• pp.129-135
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• 2017

In this paper, we propose a system to monitor the condition of elderly people who are uncomfortable by using smart-phone and biometric sensor at any time and for care-givers to provide with the best medical service anytime and anywhere. The proposed system monitors the status of the elderly through various bionic sensors installed in the hospital ward based on the Arduino system and not only provides the physiological and medical services required by the elderly, but also informs the guardian so that he can cope with the emergency. In conclusion, this paper suggests that a reading light used by elderly people can operate as a home server with a biosensor using Arduino and Android applications (Apps.), and the smart-phone of care-givers is configured as a remote management and a emergency call system. Therefore, this study suggests important ways to improve the satisfaction of medical service for the both elderly people and care-givers of chronic diseases in the future.