• Journal of rehabilitation welfare engineering & assistive technology
• /
• v.10 no.3
• /
• pp.199-206
• /
• 2016

Most Koreans walk having their toes in or out, because of their sedentary lifestyles. In addition, using smartphone while walking makes having a desirable walking posture even more difficult. The goal of this study is to make a simple system which easily analyze and inform any person his or her personal walking habit. To discriminate gait patterns, we developed a gait monitoring system using a 3-axis accelerometer and a foot pressure monitoring system. The developed system, with an accelerometer and a few pressure sensors, can acquire subject's foot pressure and how tilted his or her torso is. We analyzed the relationship between type of gate and sensor data using this information. As the result of analysis, we could find out that statistical parameters like standard deviation and root mean square are good for discriminating among torso postures, and k-nearest neighbor algorithm is good at clustering gait patterns. The developed system is expected to be applicable to medical or athletic fields at a low price.

• Korean Journal of Applied Biomechanics
• /
• v.32 no.3
• /
• pp.103-110
• /
• 2022

Objective: The aim of this study was to investigate effect of core stabilization exercises on the erector spinae contractile properties and trunk isokinetic muscle function of middle age with low physical activity and sedentary lifestyle. Method: Twenty (female: n=10, male: n=10) middle-age subjects (age: 37.25 ± 6.08 years, height: 168.01 ± 6.84 cm, weight: 71.37 ± 11.75 kg) participated in this study. Tensiomyography was measured on the erector spinae, and the isokinetic trunk muscle function test was measured at an angular velocity of 60 °/s and 90 °/s. All subjects performed the core stabilization exercises for 60 min per day, 3 times a week, for 7 weeks. A paired t-test was performed with a significance level of 0.05. Results: Tensiomyography of the erector spinae revealed a significant post-exercise increase in the maximum radial displacement (p < .05) and velocity of contraction (p < .05), however, there wasn't a significant post-exercise change in the contraction time. Additionally, the isokinetic muscle function test of the trunk revealed a significant post-exercise increase in trunk extensor relative strength (p < .05) and strength ratio (p < .05). Conclusion: Our results indicated that core stabilization exercises reduced erector spinae muscle stiffness, increased the velocity of erector spinae contraction. Additionally, data showed the improvement in the trunk extensor strength help induce a more balanced development in trunk muscle.

• Proceedings of the EASDL Conference
• /
• 2003.04a
• /
• pp.78-79
• /
• 2003

본 연구는 여러 요인에 의해 성인병 유발이 많아지는 중년기 여성을 대상으로 정기적으로 에어로빅 운동을 수행하는 자와 좌식 생활자의 영양섭취실태, 특히 지방산 섭취실태를 조사연구 하였다. 조사대상자는 서울 근교 도시에 거주하는 평균 42.0$\pm$4.7세의 중년 여성 57명이다. 이들은 모두 폐경전 여성으로 에어로빅을 수행하는 자(A group) 44명, 좌식생활자(S group) 13명이다. 에어로빅 운동수행자는 주당 4일 이상 1일 1시간 정도의 에어로빅 운동을 6개월 이상 지속한 자이며 운동강도는 VO$_2$ max. 60% 정도로 실시되었다. 식이섭취 조사방법은 24시간 회상법을 이용하여 2일간 섭취한 식품을 조사하여 기록하였으며 섭취영양량은 컴퓨터프로그램 CANPro(한국영양학회, 영양재단)를 이용하여 1일 평균 섭취량을 산출하였고 식이콜레스테롤과 지방산의 1일 섭취량은 식품성분표(농촌진흥청)를 이용하여 산출하였다.(중략)

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2015.05a
• /
• pp.374-375
• /
• 2015

Modern people is generated as musculoskeletal diseases due to incorrect posture and habit. In the case of persistent abnormal posture outbreak inconvenient to musculoskeletal diseases in daily life. musculoskeletal diseases, which began as fatigue, pain, sensory paralysis, convulsions are developed symptoms of movement disorders, depression, deformities, etc. In this paper, the unrestrained abnormal posture and habit of occurring in the seat life, have implemented a system which can be determined in less unconscious way. By placing eight pressure sensors in the seat part, determines the posture over the distribution of the weight, it is possible to determine one normal posture and eight abnormal posture that occurs frequently in daily life. To evaluate the performance of the implemented system, the attitude determination experiment was performed. The results confirmed the high performance of 97%.

• 한국HCI학회:학술대회논문집
• /
• 2009.02a
• /
• pp.901-906
• /
• 2009

어린이 도서관은 일상생활 가까이에서 지역주민에게 지식정보 서비스를 제공할 뿐 아니라 공공도서관과의 연계를 통해 우리나라 전체 도서관 서비스의 수준을 발전시키고자 하는 생활 친화적 문화기반 시설인 소규모 도서관(혹은 문고)시설이다. 즉 어린이 도서관은 접근성을 가장 큰 장점으로 하여 누구나 쉽고 편리하게 이용할 수 있는 고객중심의 공공도서관 서비스라고 할 수 있다. 어린이 도서관의 주 이용고객은 어린이와 주부로서 최근 이들이 함께 도서관을 이용하는 빈도가 증가하면서 어린이 도서관은 단순히 책을 빌리고 공부를 하는 장소에서 나아가 가족단위의 여가활동이 가능한 문화적 공간으로 변모하여가고 있다. 어린이 도서관은 기본적으로 책을 읽는 조용한 공간이지만 주 이용자가 6세 미만의 유아와 초등학교 저학년 어린이이기에 독서행위와 더불어 또래 친구들과의 친교행위. 부모님과의 정서적 유대감 형성행위, 소규모 근육활동과 같은 놀이행위가 병행된다. 또 어린이 도서관에서 사용되어지는 정형적인 모듈의 서가를 비롯한 입식. 좌식 테이블과 의자들은 소수의 디자이너에 의해 만들어진 것이지만 그것을 이용하는 다수의 어린이들은 디자이너의 의도와 방법에 따라 가구를 사용하는 것 외에도 환경적 컨텍스트에 맞추어 가구의 새로운 쓰임을 발견하며 훨씬 더 다채로운 방법으로 가구를 사용하고 있다. 따라서 본 연구의 목적은 독서 및 놀이 행위 시 아동-부모의 상호작용 방법에 기반하여 아동의 가구사용방법(Way of Seat)을 알아보고 이를 바탕으로 어린이의 행태정보를 모델링하여 가구를 사용하는 어린이의 다양한 행위 이면에 내재된 요구를 파악하는데 있다. 가구를 사용하는 어린이의 다양한 행태 이면에 내재한 어린이만의 특성과 요구를 알아보기 위해서는 먼저 어린이 도서관이라는 특수한 물리적 환경요인 및 사용자 컨텍스트(Context)에 대한 이해가 선행되어야 한다. 이를 위해 기반조사 및 어린이 도서관 방문을 통한 정황조사(Contextual Inquiry)를 실시하였다. 이를 통해 6세 미만의 유아와 초등학생의 가구사용방법(Way of Seat)과 독서 및 놀이 행위 시 행태를 관찰하여 Photo Based Research를 바탕으로 어린이의 행태정보를 모델링 하였다.

• 한국체육학회지인문사회과학편
• /
• v.55 no.3
• /
• pp.465-472
• /
• 2016

The purpose of this study was to analyze the amount of physical activity and body composition and to investigate physical activity according to cancer type, sex, and age among colorectal and gastric cancer survivors. A total of 354 participants who were colorectal (n=185) and gastric (n=169) cancer survivors had completed all treatment less than 4 years ago at Y university hospital between June 2014 and April 2015. The Global Physical Activity Questionnaire (GPAQ) was used to measure time and intensity of physical activity according to the different types of activity. The colorectal cancer survivors were significantly higher in body mass index, waist circumference, percent body fat, blood pressure, and the prevalence of diabetes compared to gastric cancer survivors. In addition, the results showed that only 26.5% of colorectal cancer survivors met American College of Sports Medicine (ACSM) guidelines (at least of 150 min of moderate intensity of higher physical activity per week) for physical activity, compared with 41.4% of gastric cancer survivors. Additionally, only 13.6% of colorectal and gastric cancer survivors met strength exercise guidelines. The male cancer survivors were significantly higher in moderate physical activity, participation in resistance exercise, and sedentary behaviors compared to female cancer survivors. In additions, less than 65 years cancer survivors were higher in strenuous intensity exercise and moderate physical activity compared to more than 65 years cancer survivors. The alternative for promoting physical activity participation rates of colorectal and gastric cancer survivors should be presented.

• The Journal of the Korean bone and joint tumor society
• /
• v.1 no.2
• /
• pp.133-144
• /
• 1995

After resection of intraarticular, periacetabulum(P2) and pubic rami(P23) and extraarticular, proximal femur(P2-H12) by Enneking classification, reconstruction is very difficult. We experienced three cases of saddle prostheses for reconstruction after P2, P23, and P2-H12 resection in pelvic malignancies. Case 1 was a high grade chondrosarcoma in 36 year-old-man and P2 resection was done. But he died of disease 19 months after operation. Case 2 was a malignant giant cell tumor in 32 year-old-woman. P23 resection was given and she is disease-free 32 months after operation. Case 3 was an osteosarcoma of 27-year-old-man and P2-H12 resection was performed and he is disease-free postoperative 12 months now. According to MSTS functional evaluatin system, all three patients showed no pain(5), intermediate function(2), emotinally satisfied(3), one cane or crutch supported(1), limited walking(3), and minor cosmetic gait(3). There was no significant complication and no dislocation except intermittent inguinal hernia in case 2. All patients started crutch walking 3 weeks after operation. Around 6 months postoperatively, the preserved iliac wing(P1 component) was hypertrophied enough to endure the full weight bearing. All could have squating and kneeling positions. In conclusion, saddle prosthesis would be a very useful method of reconstruction after P2, P23, and/or H1-2 resection to shorten the operation time and to reduce the infection rate without significant loss of function.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2017.05a
• /
• pp.629-630
• /
• 2017

Recently, the number of patients with habitual vertebrae is increasing due to inappropriate postures and habits while sitting on a chair for a long time, because modern people have a great deal of work and studying due to a lot of work and study. Therefore, it is necessary to prevent such a disease through real-time monitoring and to present a guide for the user to recognize the importance of correct posture. In this study, we implemented a posture discrimination system which can help users to calibrate posture by judging the user's sitting position and feedback by using a pressure sensor based weight distribution system. We analyzed the distribution pattern of body weight to determine one normal posture and six abnormal postures. If the abnormal posture is maintained constantly, the implementation of the application that induces the right posture by ringing the notification is described.

• The Journal of the Institute of Internet, Broadcasting and Communication
• /
• v.23 no.5
• /
• pp.63-70
• /
• 2023

In this paper, we propose a Mixed Reality based rehabilitation exercise solution with the goal of mitigating one of the most common chronic conditions among the elderly, musculoskeletal disorders. In modern society, as the number of elderly increases, more people engage in office work and engage in more sedentary activities. Due to repetitive work in the office, muscle strength decreases and this causes many difficulties in daily life. In this study, we developed a mixed reality based exercise platform to solve these chronic musculoskeletal diseases. VR is not appropriate for elderly because of dizziness. In addition, we developed a wearable sensor based on IMU and attached it to important parts of the upper body to motion tracking. We developed a algorithm synchronize to raw data from wearable sensor with in a vr avatar. Ederly can check in real time whether rehabilitation exercises are being performed accurately through the avatar.

• Clinical and Experimental Pediatrics
• /
• v.48 no.1
• /
• pp.75-80
• /
• 2005

Purpose : Internal tibial torsion is prevalent in East Asian countries such as Korea and Japan, where sitting on the floor is common behavior. Internal tibial torsion or excessive lateral tibial torsion may cause esthetical, functional, or psychological problems and also may induce degenerative arthritis in older age. The purpose of this study is to measure the tibial torsion in children of the Jeju area. Methods : Tibial torsion was measured in 1,042 lower extremities of 521 children from one to 12 years of age. The values of transmalleolar angles were analyzed for each age group divided by 6 months. Quadratic and linear regression models were used to fit patterns of changes in mean values of transmalleolar angles. The age at seven, which provides the highest coefficient of determination for quadratic regression analysis, was used as a cut-off point to fit different statistical models. Results : The mean transmalleolar angle was $0.10{\pm}5.79^{\circ}$ in all children,$ 0.90{\pm}5.49^{\circ}$ in males, and $-0.80{\pm}5.97^{\circ}$ in females. The value was $4.25{\pm}4.04$ in 1 year of age, gradually decreased to the lowest level of $-1.98^{\circ}$ in four years and seven months of age, increased again with age until it reached $0.67{\pm}1.10^{\circ}$ at seven years of age, and stayed at that level thereafter. Conclusion : Internal tibial torsion in infancy is known to correct spontaneously in the normal developing process. But in this study, the mean transmalleolar angle in children of Jeju area annually decreased after one year of age; to the lowest angle at four years and seven months of age; increased again gradually to the age of seven; and persisted in that level, about $10^{\circ}$ less than western children, not correcting further thereafter. These findings suggest tibial torsion might be caused by lifestyle, especially sitting on feet. To prevent abnormalities of joints and gaits, early diagnosis of tibial torsion in childhood and posture correction or early treatment when needed, seems to be necessary.