• Journal of the Korean Society of Marine Environment & Safety
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• v.25 no.7
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• pp.834-840
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• 2019

Recently, due to increased tourism and leisure activities, falls by fishers from coastal wave-dissipating blocks (breakwaters) in Korea have been rising. We investigated the optimal mesh size for use in safety nets designed to cover Tetrapod (TTP) breakwaters to prevent casualties from falls. This is a prerequisite for considering the scale and economics of safety net facilities. The optimal mesh size was determined based on the fisher gender and age, and the bodily features of Koreans. The optimal mesh size was found to be 18.6-27.0 cm, derived based on the femoral length and chest circumference.

• Journal of Convergence for Information Technology
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• v.10 no.8
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• pp.99-107
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• 2020

This study is to design an effective fall-prevention nursing program. Researchers investigated the current condition and risk factors for falls in the small-medium sized rehabilitation hospital with descriptive research. We conducted integrative literature review to reflect the current approach of fall-prevention nursing program. We found that the risk factors for falls are related to the characteristics of clinical setting of the hospital. We suggested the nursing intervention with applying fall risk assessment scale that is sensitive to the elderly population and the intervention that shows maximum effect. In conclusion, this study proposed the way of selecting an effective fall-prevention nursing program based on a clinical setting and prospective of its application. This will contribute to the improvement in nursing practice with the critical view in hospital fall.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2023.05a
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• pp.246-247
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• 2023

국제해상인명안전(SOLAS)협약의 제5장 제 23 규칙은 도선사 이용 가능성이 있는 항로 항해 선박의 도선사용 승하선 설비를 설치할 것을 의무적으로 규정하고 있으며, 우리나라의 도선법 제25조에서도 선장은 도선사가 안전하게 승하선할 수 있도록 승하선 설비를 제공하는 등의 필요한 조치를 해야 하는 의무규정을 두고 있으나 감천항에 입출항하는 어선들을 비롯한 많은 선박들이 안전한 승하선 설비를 제공하지 않아 도선사들의 낙상사고와 위험 상황이 빈번히 발생하고 있어 도선사의 안전한 승하선을 위한 대책을 마련하고자 한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2014.10a
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• pp.475-478
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• 2014

요즘 등산객의 수가 늘어나고 있으며 이에 따라 등산에 관련된 옷들과 장비들이 출시가 되고 있다. 이처럼 등산객이 늘어나고 새로운 등산복과 장비가 출시되었지만 해마나 등산 사고율은 여전히 증가하고 있다. 등산 사고 중 추락/낙상는 등산사고의 많은 비중을 차지한다. 이러한 사고가 일어났을 경우 빠르게 대처할 수 있는 방법으로는 다른 등산객이 구조대를 호출하는 방법 외에는 없다. 특히 혼자 등산을 하는 도중 추락사고가 일어나 혼자서 구조요청을 할 수 없는 상황이거나 정신을 잃었을 경우는 더욱더 그 상황을 대처하기가 힘들다. 본 논문에서는 자이로센서, 가속도센서와 지그비센서를 이용하여 등산객의 위치와 움직임의 방향 및 속도를 측정하여 근거리 무선 통신을 통해 실시간으로 스마트폰에 정보를 전송하여 사용자에게 알려 주는 기능과 추락/낙상 사고가 일어났을 경우 지정되어 있는 핸드폰으로 구조요청 메시지를 보내고, 구조대를 호출하여 초기에 대처할 수 있는 효과적인 방법을 제시하였다.

• Journal of IKEEE
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• v.17 no.1
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• pp.22-28
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• 2013

According to a survey, more than 50% of the elders fall which is the most frequent daily safety accident of the elders takes place at home. Furthermore, the elders fall is anticipated to increase as more elderly people are expected to live alone since, 67.1% of the elders of 65 or more do not hope to live with their children. This research aims to verify the fall by measuring and analyzing the floor vibration, and the hardware system was also designed was Piezo Film Sensor, Op-Amp, and DAQ. The system is consists of signal processing part for measuring floor vibration and alarm part for identifying the consciousness of the user when the fall occurs. The fall detection by vibration signals verified by k-Nearest Neighbor verification, and the results showed the error rate of 3.8%.

• Smart Media Journal
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• v.10 no.3
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• pp.31-38
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• 2021

It is hard to predict when and where a fall accident will happen. Also, if rapid follow-up measures on it are not performed, a fall accident leads to a threat of life, so studies that can automatically detect a fall accident have become necessary. Among automatic fall-accident detection techniques, a fall detection scheme using an IMU (inertial measurement unit) sensor attached to a wrist is difficult to detect a fall accident due to its movement, but it is recognized as a technique that is easy to wear and has excellent accessibility. To overcome the difficulty in obtaining fall data, this study proposes an algorithm that efficiently learns less data through machine learning such as KNN (k-nearest neighbors) and SVM (support vector machine). In addition, to improve the performance of these mathematical classifiers, this study utilized feature data aquired in the frequency space. The proposed algorithm analyzed the effect by diversifying the parameters of the model and the parameters of the frequency feature extractor through experiments using standard datasets. The proposed algorithm could adequately cope with a realistic problem that fall data are difficult to obtain. Because it is lighter than other classifiers, this algorithm was also easy to implement in small embedded systems where SIMD (single instruction multiple data) processing devices were difficult to mount.

• Proceedings of the Korean Society of Computer Information Conference
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• 2022.07a
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• pp.441-442
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• 2022

현재 고령화 시대에 접어들며 대한민국 고령화 노인 비율이 2022년 기준 17%에 도달했다. 그만큼 대한민국의 고령화 시대가 급격하게 진행되고 있다. 노약자 수가 증가함에 따라 안전사고 발생 빈도가 증가했다. 본 논문은 노약자들이 심박, 체온 센서의 측정값을 그래프로 표현한 후 검사결과를 토대로 의사와 원격진료가 가능하여 병원을 방문하지 않고 의사와 상담 및 진료가 가능하다. 또한, 낙상 상황 발생 시에는 낙상 상황 발생 후 일정 시간 동안 움직임이 감지되지 않으면 보호자에게 위치 및 안전문자가 전송되어 안전사고 문제를 예방할 수 있다.

• Journal of the Korean Data and Information Science Society
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• v.22 no.2
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• pp.137-148
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• 2011

In this paper, we systematically investigate regional differences of the dead due to injuries in cities, towns and counties about transportation accidents, suicides and fall accidents, which have recently been an important issue of health problems in Korea, The data are from the Annual Report on the Cause of Death Statistics in Korea in 2008. They include the deaths over the age 19 from transportation accidents, suicides and fall accidents with the criterion of the International Statistical Classification of Diseases. Poisson HGLM is applied to estimate the mortality rate under the assumption that the number of deaths follow a Poisson distribution, by considering regions as random effects and by adjusting age, sex and standardized residence tax as fixed effects. Using the results of random effects prediction, the regional differences in cities, counties and towns are marked in disease mapping. The results showed that there were significant regional differences of mortality rates for transportation accidents and suicides, but no significant differences for fall accidents.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.4
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• pp.2142-2149
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• 2014

This study was to find out urinary incontinence, quality of sleep and efficacy of fall in the community dwelling elderly and to investigate how the factors were connected to one another. Data were collected between January 3rd and 30th, 2013 from 112 elderly people who aged 65 or older. They agreed to participate in this study sampled among elders assistants in a way of responding to the questionnaire after being read. The study scales were composed of demographic characteristics, urinary incontinence, quality of sleep and efficacy of fall. A total of 45(40.2%) subjects were reported fall experienced. The results showed a positive correlation with urinary incontinence, quality of sleep and efficacy of fall. Multiple linear regression analysis revealed that predictor of efficacy of fall was quality of sleep. A combination of the urinary incontinence and quality of sleep accounted for 9.6% of the efficacy of fall.

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.1794-1795
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• 2011

본 연구에서는 가속도 센서의 값을 디지털 신호 처리 과정을 통하여 저역통과 필터(low pass filter), 벡터의 크기(vector magnitude), 롤(roll) 그리고 피치(pitch)를 계산하는 알고리즘을 적용하였다. 필터의 경우 IIR(Infinite Impulse Response)을 이용하였으며 차수는 9차로 하였다. 피험자의 연령은 $25{\pm}5$세의 10명을 기준으로 실험하였으며 앞, 뒤, 좌, 우 방향으로 직각 낙하하도록 하였고 센서 모듈은 오른쪽 허리의 정중앙에 착용하도록 하여 피험자간의 오차가 발생하지 않도록 하였다. 환자의 낙상을 검출하기 위해서 벡터의 크기를 사용하였고 롤과 피치를 이용하여 환자의 낙상 방향을 검출하였다. 결과적으로 피험자 10명의 경우 낙상의 검출률은 100% 였으며 낙상 방향에 따른 앞, 뒤, 좌, 우 판별 정확도는 95% 정도이다. 낙상 방향의 판별은 사고 후 환자를 다룰 때의 주의할 신체부위를 참고하며 재활 운동 시 하체의 어느 쪽이 낙상의 주요인인지 분석하는 보조 자료가 될 수 있다.