파워리프트 사용시 간병인에서의 근골격계질환 발생 가능성 평가

최현호(Hyunho Choi),전경진(Keyoungjin Chun),임도형(Dohyung Lim) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.4

Development on the Auto Showering System Concerning Bed Type for the Elderly

Jaesoo Hong,Jonghyun Kim,Keyoungjin Chun 대한인간공학회 2012 大韓人間工學會誌 Vol.31 No.2

Objective: The aim of this study is to design an auto showering system regarding bed type for old people or bedridden patients. Background: The rapid growth concerning the aging population leads to an increase in elderly bedridden patients living in senior care centers and hospitals where care givers have difficulty bathing older people with limited mobility. Method: In this study, a showering equipment for experiment was based on anthropometric and researching existing products. The nozzle position was optimized by showering tests and simulations using showering equipment. Results: The problems regarding the existing products were analyzed and the nozzle position was optimized through showering tests. The number, position, and spraying angle of the nozzle were optimized through showering simulations. The automatic showering system concerning bed type was designed by considering their results. Conclusion: When designing an automatic showering system, the most important design element involves determining the position of nozzle and angle of water injection and the number of nozzles. The system was developed by applying the results through user centered-research. Application: The user centered-research for developing products was applied directly in order to develop automatic baths, showering products etc. Furthermore, it was also available to be applied towards senior friendly products.

Analysis on Acceleration Change and Angle Change of Human Low Limbs according to Slipping Speeds, when Falling

( Jaesoo Hong ),( Hyoungin Choi ),( Keyoungjin Chun ) 한국감성과학회 2014 춘계학술대회 Vol.2014 No.-

The aim of the current study was to develop a new coding method for smart devices. Though the grasp posture can be regarded as astatic gesture, there are few studies on grasp coding methods compared to those on gesture coding methods. By integrating and extending previous studies, we suggested a new coding method that simultaneously considers ``hand information`` and ``object information``. The proposed new grasp coding method can effectively describe various types of grasp postures by using a 26 x 8 matrix per hand, hence can be used to develop PUIs (Physical User Interfaces) for various products including smart phones

Evaluation of Seat Pan Inclination During Sit-to-stand for Development of Elderly Lifting-chair

Jaesoo Hong,Jonghyun Kim,Keyoungjin Chun 대한인간공학회 2011 大韓人間工學會誌 Vol.30 No.2

Objective: The aim of this study is to set the design direction of the lift chair's tilting seat for development. Background: Great attention has been shown to the development of senior friendly product, because of increasing elderly population rapidly in Korea. Therefore, we need to study on sit-to-stand(STS) motion of elderly systematically for developing lift chair that is one of senior friendly products. Method: In this study, we analyzed joint moment(knee, hip) and muscle activity (Erector spinae, Rectus femoris, Vastus lateralis) on STS motion of elderly(female, 60~70: 7) and young people(female, 20~30: 7) using 3 dimension motion capture camera, force plate, wireless EMG. Results: The results of muscle activity showed a similar trend but the results of joint moment were a lot of differences between the young and the elderly. Conclusion: The results of knee joint moment suggest the angle(10~30deg)-adjustable seat that can be better than to find the optimal seat's angle. Application: The method and results of this study are expected to develop senior friendly product and verification as well as be available to various application.

Analysis on Acceleration Change and Angle Change of Human Low Limbs according to Slipping Speeds, when Falling

Jaesoo Hong,Hyoungin Choi,Keyoungjin Chun 대한인간공학회 2014 대한인간공학회 학술대회논문집 Vol.2014 No.5

A Design on the Auto showering system of Bed type

Jaesoo Hong,Jonghyun Kim,Keyoungjin Chun 대한인간공학회 2011 대한인간공학회 학술대회논문집 Vol.2011 No.5

Objective: The aim of this study is to design an auto showering system of bed type for old people or bedridden patients. Background: A Rapid growth of older population leads to an increase in the elderly bedridden patients living in senior care centers and hospitals where caregivers have trouble bathing older people with limited ability. So, we need apparatus to help their shower. Method: In this study, based on Anthropometric and researching existing products of showering equipment for experiment was made. And its nozzle position is variable. The nozzle position was optimized by showering test and simulation using showering equipment. Results: The problems of existing product were analyzed and the nozzle position was optimized through showering test. The number, position, spraying angle of nozzle were optimized through showering simulation. The automatic showering system of bed type was designed by considering their results. Conclusion: The most important design element of showering system is the determining position of nozzle and angle of water injection, number of nozzle. It was developed by applying its results through user centered-research. Application: The user centered-research of developing products was able to apply directly to develop automatic bath, showering products etc. Furthermore it was available to apply senior friendly products.

높이 조절 샤워의자의 개발을 위한 설계 가이드라인 분석

홍재수(Jaesoo Hong),전경진(KeyoungJin Chun) 한국HCI학회 2014 한국HCI학회 학술대회 Vol.2014 No.2

고령자에게 있어서 샤워는 삶의 질과 관련된 중용한 행위중에 하나이다. 본 연구에서는 고령자용 높이 조절 샤워의자를 개발하기 위한 설계 가이드라인을 제시하기 위한 것이다. 첫째, 높이 조절 샤워의자를 인체 치수를 적용하여 디자인하였다. 둘째, 기존 해외 제품을 가격, 형상, 기능 등을 분석하였다. 고령친화제품개발의 사례연구는 고령자를 위한 제품개발의 프로세스를 체계화함에 따라 타 복지기구 및 고령자들을 위한 다양한 종류의 생활지원기기뿐만 아니라 다른 관련 산업에도 응용이 가능한 요소 기술을 확보할 수 있었다. The shower to elderly people is an important activity that related to the quality of life. In this study, to develop a height adjustable shower chair for elderly people, firstly, a height adjustable shower chair was designed by applying human dimensions. Secondly, existing international products were analyzed the prices, features, and performance. Thus, the elderly a height adjustable shower chair was developed by ergonomic design procedure of three steps.

Case Study on Developing an Elderly Automatic Shower System

Jonghyun Kim,Jaesoo Hong,Keyoungjin Chun 대한인간공학회 2011 大韓人間工學會誌 Vol.30 No.5

Objective: The aim of this study is developing an elderly automatic showering system by optimizing nozzle position and angle of water injection on ergonomics approach. Background: The elderly living in nursing home or hospital were increased by an aging population. Helping the elderly on showering is so hard. In addition, the existing showering/bathing systems are not effective because shower pattern of the elderly and washed range of nozzle were not considered. Method: Firstly, basic specification were determined by anthropometric approach. Secondly, position of nozzle and angle of water injection were determined through observation of elderly behavior on showering. And, finally, they were optimized by washing test and showering simulation. Results: On showering importance of body parts were able to analysis through observation of elderly behavior. The position of nozzle and angle of water injection was able to optimize by showering simulation. The automatic showering system was developed by considering their results. Conclusion: The most important technology of developing a showering system is the determining position of nozzle and angle of water injection, number of nozzle. It was developed by applying its results through user centered-research. Application: The user centered-research of developing products was able to apply directly to develop automatic bath, showering products etc. Further more it was available to apply senior friendly products.

A Study on the correlation between muscle strength and muscle activity on Shoulder motion of upper body

Jaesoo Hong,Joohyun Sim,Jonghyun Kim,Keyoungjin Chun 대한인간공학회 2011 대한인간공학회 학술대회논문집 Vol.2011 No.5

Objective: This study is aimed at estimating each muscle strength and EMG in flexion-extension and abduction-adduction motions while exercising the upper body and specifying the correlation between each agonist muscle activity and muscle strength. Method: Based on the previous studies, this research has selected the 10 upper- body muscles that are related to flexion-extension and abduction-adduction motions. Muscle strength and its activity have been measured during an experiment in synchronizing an Isokinetic dynamometer and an EMG. Pearson correlation coefficient has been used for an analysis about the correlation between the muscle strength and muscle activity. Results: 1. The agonists in flexion include: Upper Trapezius, Anterior deltoild, Middle deltoild, Biceps, Pectoralis major clavicular insertion. The agonists in extension include: Posterior deltoid, Tricep long, Infraspinatus, Latissimus Dorsi. The agonists in abduction include: : Upper Trapezius, Anterior deltoild, Middle deltoild, Biceps, Pectoralis major clavicular insertion. The agonists under adduction include: Tricep long, Pectoralis major sternal insertion, Latissimus Dorsi, Pectoralis major clavicular insertion. 2. The results of an analysis of correlation between muscle strength(Nm) and muscle activity(%MVC) in 4 motions(flexion, extension, abduction and adduction) were as follows: ① The result of flexion is significant correlation (acoefficient of correlation: 0.573**), ② The result of extension is weak correlation (0.387*), ③ The result of abduction is significant correlation (0.428*), ④ The result of adduction is significant correlation (0.693**). Conclusion: This research has analyzed the correlation between each agonist muscle activity and muscle strength in the four motions. The results between mean value of agonists' muscle activity and shoulder's muscle strength showed significant correlation but the correlation between each agonist and muscle strength was not showed.

사용자의 복부 압박과 전동 침대 절첩 구조에 관한 상관관계 연구 : 전동침대의 등판과 다리판 구동 시 복부 압박을 감소시키는 절첩 구조에 대한 분석 및 고찰

곽영찬(Yeongchan Kwak),최현호(Hyunho Choi),전경진(Keyoungjin Chun) 한국HCI학회 2012 한국HCI학회 학술대회 Vol.2012 No.1

급격한 경제성장 및 의료기술의 발전에 따라 세계적으로 고령화가 빠르게 진행되고 있으며 큰 사회문제로 대두되고 있다. 이러한 인구고령화에 따라 다양한 복지 용품의 시장 규모도 큰 규모로 성장하고 있으며, 수면과 휴식을 취하는 장소로서 일상의 1/3을 차지하는 침대의 중요성 또한 커지고 있다. 특히 전동침대는 등판, 다리판 각도제어, 높낮이 제어가 가능하여 사용자에게 제공되는 편의성이 높기 때문에 일상생활에서 중요성이 더욱 증가하고 있다. 하지만 등판이나 다리판의 각도조절시 사용자의 복부를 압박할 수 있으며 복부 압박이 심할 경우 호흡곤란 등의 증상을 발생시킬 수 있다. 따라서 전동침대 등판과 다리판의 구동 방식에 따른 복부 압박의 상관관계를 분석한 연구가 요구되지만 현재까지의 관련 연구는 전무한 실정이다. 본 연구에서는 삼차원 동작 분석 시스템을 사용하여 등판의 각도 조절시 절첩구조에 따른 복부 압박의 정도를 측정하였으며, 침대형 체압 측정 매트리스를 이용하여 인체와 매트리스 사이에서 발생하는 둔부 체압 변화를 측정하였다. 실험 결과에 따르면 등판의 움직임에 따라 둔부가 후퇴하는 구조의 전동침대가 단순 경첩구조의 전동침대보다 복부압박을 경감할 수 있는 구조로 판단되었다. 향후 등판 후퇴구조의 절첩 방식을 전동침대 및 Chair System 등의 등판설계에 적용할 경우 복부 압박 감소 효과가 있을 것으로 기대된다. Depending on the economic growth and development of medical technologies, the aging population is rapidly increasing. Population aging is ongoing, and thus of welfare goods market is also growing. For this reason, the bed has become an important products to spending time one third of daily life and sleep or rest. In particular, the importance of electric beds is increasing. Because of convenience and necessity by controlling the seatback angle and leg-rest angle and lift control. However, there is no research about analyze the correlation between abdominal pressure and type of adjust seatback or leg-rest angle mechanism. In this study, we analyzed the correlation between folding type of seatback angle and abdominal pressure using 3D motion analysis system. And measuring the body pressure change between subject and mattress using bed pressure mattress in hip. In the results, the bed type of hip move back depending on seatback motion was reduces the abdominal pressure than simple folding type. This results were expected to reduce the abdominal pressure by utilized the bed type of hip move back such as electric bed or chair system.