• Therapeutic Science for Rehabilitation
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• v.10 no.1
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• pp.129-140
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• 2021

Objective : This study evaluated the differences between the upper and lower arm activities of the affected and non-affected sides in stroke patients performing activities of daily living. It was intended to gather basic data for the measurement of daily activities. Methods : The participants in the study consisted of 20 patients, 10 had left hemiplegia and 10 had right hemiplegia. Between September and November 2017, they performed drinking and dressing as unimanual and bimanual tasks. The 3-axes accelerometers were placed 2cm below the lateral epicondyle on the upper arm and 2cm below the radial styloid on the lower arm. The data were collected at intervals of 1/32 Hz and analyzed. Results : In patients with right hemiplegia, the tendon activity was significantly higher in the lower arm when performing a bimanual activity (p<.05), for all the other activities, those of the lower arm were significantly higher than those of the upper arm (p<.01, p<.05). There was no significant difference between the unimanual and bimanual activities of the affected and tendon sides in patients with left hemiplegia (p>.05). In both hands, the activity of the lower arm was significantly higher than that of the activities of the upper and lower arms, except on the affected side (p<.05). In all patients, the activities of the upper and lower arms were significantly higher (p<.05), and the activity of the lower arm was significantly higher than that of the upper (p<.001, p<.05). Conclusion : The activity was higher on the non-affected side than the affected side during the dressing task, and the overall activity was higher in the lower arm than the upper arm.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.12 no.6
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• pp.303-309
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• 2012

Energy expenditure values were estimated based on the voice signals and body activities. Voice signals and body activities were obtained using PVDF contact vibration sensor and 3-axis accelerometer, respectively. Vibration caused by voices, activity signals, and actual energy consumption were acquired using data acquisition system and gas analyzer. With the use of power values from the voice signals and weight as independent variables, R-square of 0.918 appeared to show the highest value. For activity outputs, use of signal vector magnitude, body mass index, height, and age as independent variables revealed to provide the highest correlation with actual energy expenditure. Estimation of energy expenditure based on voice and activity provides more accurate results than based on activity only.

• The Journal of the Korea Contents Association
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• v.10 no.4
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• pp.98-105
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• 2010

Health of the people involved in blood sugar, blood pressure, activity, and using bio-sensors to obtain biometric information, the system for monitoring health research for development is a lot. This paper analyzes the bio information by monitoring the u-health care agent system was developed. Activity measurement technology that uses 3-axis accelerometer sensor. 3-axis acceleration sensors, using information obtained from activity to activity analysis to calculate the exact algorithm was developed. More accurate than the existing system to calculate the calorie consumption, it is stored in the database management. and you can check your health status using of activity and bio-information.

• Journal of Korean Society of Coastal and Ocean Engineers
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• v.17 no.4
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• pp.213-220
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• 2005

An approach to calculate expected sliding distance of wave dissipating caisson breakwater is proposed. Time history of dynamic wave pressure for the calculation of sliding distance is made by extending conventional static wave pressure developed for the wave dissipating caisson breakwater. Construction of impact wave and standing wave was done by using duration time and maximum wave pressures of themselves. In the numerical analysis, the sliding distance for an attack of single wave and expected sliding distance for 50 years of wave dissipating breakwater by proposed method were compared with those by conventional method for uplift caisson breakwater. It was found that the sliding distance of wave dissipating breakwater by the proposed method is smaller than by conventional method.

• Journal of Preventive Medicine and Public Health
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• v.26 no.3 s.43
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• pp.332-346
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• 1993

This study was attempted to observe leisure time physical activity pattern and its relationship to coronary risk factors (BMI, systolic blood pressure, diastolic blood pressure, serum total cholesterol, triglycerides, fasting blood sugar). Subjects participated in this study were 277 adult male workers of an industry in Kyungpook province, Korea. Energy expenditure were measured using modified Physical Activity History questionnaire of CARDIA study by interviewing. Serum total cholesterol, triglycerides and blood sugar level were tested with 5 ml fasting blood and height, weight and blood pressure were masured. Data on smoking and drinking habits and others were obtained. Geometric mean of leisure time physical energy expenditure were estimated as 212.80 kcal per week for study subjects and only 22.4% of them expended 2,000 kcal or more per week in leisure time physical activity. Taking walks or hikes and jogging or running were more frequent leisure time physical activities in study subjects. Statistically significant mean differences in total weekly leisure time physical activity for all coronary risk factors were not found among three groups. Because energy expenditure of leisure time was generally low in this subjects and most of them were healthy men, we did not found that leisure time physical activity was significantly associated with coronary risk factors.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2013.05a
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• pp.995-996
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• 2013

본 연구에서는 스마트폰을 이용하여 사용자의 활동상태를 추정할 수 있는 안드로이드 기반의 어플리케이션을 구현하였다. 이는 추가적인 센서를 사용하지 않고 항시 휴대하는 스마트폰을 이용함으로써 착용형의 시스템과 비교하여 사용자의 불편함을 최소화하여 활동상태를 추정할 수 있다. 이를 위하여 스마트폰 내부에 내장된 3축가속도센서 각 축의 변화량을 추출하였으며, 각 축에 대한 변화량과 활동량이 비례하여 나타나는 것을 이용하여, 변화량을 크기로 변환하는 SVM(Single Vector Magnitude)을 계산하였다. 또한 SVM의 절대값을 시간에 적분한 ISVM(Integral Single Vector Magnitude)을 통해 활동량을 정량화 하였으며, 천천히 걷기와 빠르게 걷기, 뛰기, 서있기로 이루어진 실험을 통해 활통상태 분류를 하였다. 또한 그 결과를 실시간으로 모니터링하기 위한 스마트폰 어플리케이션을 구현함으로써 추가적인 설비 없이 활동상태를 추정하였다.

• The KIPS Transactions:PartD
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• v.18D no.2
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• pp.143-148
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• 2011

In this paper developed a wearable activity device and algorithm which can be converted into the real-time activity and monitoring by acquiring sensor row data to be occurred when a person is walking by using a tri-axial accelerometer. Test was proceeded at various step speeds such as slow walking, walking, fast walking, slow running, running and fast running, etc. for 36 minutes in accordance with the test protocol after wearing a metabolic test system(K4B2), Actical and the device developed in this study at the treadmill with 59 participants of subjects as its target. To measure the activity of human body, a regression equation estimating the Energy Expenditure(EE) was drawn by using data output from the accelerometer and information on subjects. As a result of experiment, the recognition rate of algorithm being proposed was shown the activity conversion algorithm was enhanced by 1.61% better than the performance of Actical.

• The Safety technology
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• no.178
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• pp.6-10
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• 2012

가을철은 기온이 선선해지면서 사람들의 활동량이 늘어나는 계절이다. 어린이들도 학교나 가정 등, 실내외 활동이 왕성해지면서 각종 안전사고에 노출되기 쉬워진다. 특히 어린이들은 주변 사물에 대한 호기심이 크고 활동량이 많은 특징을 가지고 있으나 주의력과 판단력 등 인지능력이 아직 성숙하지 못한 까닭에 위험에 대처하는 능력이 미숙하다. 띠라서 상시 안전사고 예방교육을 통해 어린이들에게 위험요소들에 대한 주의와 대처 능력을 키워주어야 한다. 어린이들의 활동량이 늘어나는 계절 10월, 이번호에서는 어린이 안전사고 예방 교육의 중요성과 각종 안전사고 사례, 예방과 응급처치 등에 대한 특집을 마련한다.

• Proceedings of the Korea Water Resources Association Conference
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• 2017.05a
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• pp.462-462
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• 2017

유량은 기후적 요인과 인간활동 요인에 의하여 변동된다. 특히 우리나라는 지난 30년 동안 전지구적인 기후변화와 특정지역에서의 인간활동의 변화가 급격하게 진행된 바 있으므로, 합리적인 수자원 계획을 수립하기 위해서는 두 가지 요소들로 인한 유량의 변동량을 정량적으로 분리하여 분석할 필요가 있다. 또한 우리나라와 같이 연강수량의 대부분이 특정 계절에 집중되는 국가나 유역에서는 월별, 계절별 및 년별로 구분된 수문분석을 시행하여야 보다 실질적인 수자원 관리계획을 수립할 수 있다. 그러나 유량의 변동량을 특정 원인별로 구분하여 분석하고자 하는 연구는 기존의 홍수나 가뭄 자체에 관한 연구에 비해 미미한 형편이며, 다양한 시간단위를 이용한 원인별 유량 변동량의 산정에 관한 연구는 더욱 찾아보기 힘들다. 따라서 본 연구에서는 기후변화로 및 인간활동으로 인한 유량 변동량을 정량적으로 분리하기 위하여 수문모형(hydrological model)을 이용한 방법과 수문학적 민감도 (hydrological sensitivity) 분석 방법을 소양강 상류유역 및 섬강 유역에 대해 적용하고 유량 변동량의 결과를 월별, 분기별 및 년별로 구분하여 제시하였다. 먼저 두 유역에 대한 기후변화 및 인간활동의 양상을 강수, 온도, 유량, 인구변화, 불투수층 변화의 추세를 통해 파악하였으며, 인간활동으로 인해 발생되는 급진적인 변동점을 탐색하기 위해 이중누가곡선, Pettitt 검정 및 베이지안 변동점 (Bayesian change point) 분석을 시행하였다. 탐색된 변동점을 활용하여 수문모형에 의한 유량 변동량을 정량화하기 위하여 변동점 이전 구간에 대해 보정 및 검증된 SWAT모형을 사용하였으며, 6가지의 Budyko 곡선 함수들로부터 각각 유량 변동량을 산정하여 수문모형에 의한 유량 변동량을 검증하였다. 최종적으로 수문모형을 이용한 방법을 통해 두 유역에 대한 기후변화 및 인간활동으로 인한 유량 변동량을 정량화하였다. 소양강 상류유역은 기후변화로 인한 유량 변동량이 인간활동으로 인한 유량변동량보다 상대적으로 크게 산정되었으며, 섬강 유역은 소양강 유역과 반대의 결과를 보이는 것으로 분석되었다. 특히 본 연구에서는 해당 분석결과를 월별 및 분기별로 구분하여 제시함으로써, 향후 특정 지역 및 시기에서의 합리적인 수자원 관리계획의 수립에 활용될 수 있는 기초적인 자료를 제공하였다.

• Journal of the Korean Society of Food Science and Nutrition
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• v.21 no.4
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• pp.334-340
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• 1992

This study was intended to investigated the relationship between habitual physical activity, nutrients intakes and urinary riboflavin excretion of elderly women and to compare riboflavin biochemical status of urban elderly women with rural elderly women. While average daily riboflavin intake of elderly women subjects was below Recommended Dietary Allowances for Koreans, riboflavin biochemical status was adequate in terms of average urinary riboflavin excretion. Urinary riboflavin excretion did not show significant correlation with energy expenditure, physical activity level and riboflavin intake. Nutrients intakes of urban and rural elderly women were not significantly different. However, energy expenditure and physical activity level were significantly higher, urinary riboflavin excretion was significantly lower in rural than in urban elderly women. It is suggested that riboflavin biochemical status was influenced by physical activity.