• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.22 no.4
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• pp.103-109
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• 2022

This significance of the infant care system has emerged due to sudden infant death during sleeping. This paper presented a design and implementation of a prototype model, which is a infant care device controlled by a smartphone using Bluetooth technology. Prototype Device Model consists of MCU(microcontroller unit), Accelerometer Sensor, Temperature Measuring Sensor, Sound Measuring Sensor, Bluetooth Module, and Camera Module. The proposed application transfers the information to the parent's smartphone and computers, such as infant's falling, crying, and fever detection. A test verified the availability of a prototype infant care system model using Bluetooth Low Energy with operating the low power driving.

• The Journal of the Korea institute of electronic communication sciences
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• v.18 no.4
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• pp.731-736
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• 2023

Walking is a periodic motion that contains specific phases and is a basic movement method for humans. Through gait analysis, various musculoskeletal health conditions can be identified. In this study, we propose a calf wearable sensor system that can perform gait analysis without space limitations. Using a ToF(: Time-of-Flight) sensor that measures distance and an IMU(: Inertial Measurement Unit) sensor that measures inclination the heel trajectory of walking was derived by proposed method. In case of abnormal gait with risk of fall, gait is evaluated by analyzing the change pattern of the heel trajectory.

• Journal of the Korean Society of Physical Medicine
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• v.2 no.1
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• pp.73-84
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• 2007

Purpose : The purpose of this study was to determine risk factors and methods in balance assessment associated with fall in older adults. Methods : This article describes many of the tools that can be used to evaluate the physical parameters associated with fall risk in older adults. Results : Composite ratings of performance(Tinetti balance assessment, Guralnik test battery, Berg balance scale, modified-physical performance test) measures the score compounding the balance measure to determine fall risk. Static balance instruments are composed of FICSIT-4 that measures the ability of maintaining foot positions and CTSIB that measures postural stability. Dynamic balance instrument is composed of functional reach test. To measure walking velocity and mobility, 8-foot up-and-go test and walking around two cones are used. We can use 1-RM and to measure muscular strength, isokinetic dynamometery, and 30-second chair stand to measure lower extremity muscle strength. Conclusion : The described instruments are easy to use and widespread. To select and use these tool kits carefully is considered to be helpful in identifying those who are most likely to fall. The final part of the article includes a brief discussion of the potential role of exercise training interventions to improve these physical parameters and prevent falls.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.60 no.6
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• pp.1204-1208
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• 2011

In this study, we proposed the system that calculates the algorithm with an accelerometer signal and detects the fall shock and it's direction. In order to gather the activity patterns of fall status and attach on the subject's body without consciousness, the device needs to be small. With this aim, it is attached on the right side of subject's waist. With roll and pitch angle which represent the activity of upper body, the fall situation is determined and classified into the posture pattern. The impact is calculated by the vector magnitude of accelerometer signal. And in the case of the elderly keep the same posture after fall, it can distinguish the situation whether they can stand by themselves or not. Our experimental results showed that 95% successful detection rate of fall activity with 10 subjects. For further improvement of our system, it is necessary to include tasks-oriented classifying algorithm to diverse fall conditions.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.22 no.1
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• pp.363-371
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• 2021

The goal of this study was to investigate the influence of exercise training with or without blood flow restriction (BFR) on physical performance and balance in elderly females. Participants (N = 43) were randomly divided into combined exercise with BFR group (n = 14, EX-BFR), only combine exercise group (n =14, EX) or a non-exercise control group (n = 15, CON). Both EX-BFR and EX groups had completed exercise training for 12 weeks. During the training period, the CON group maintained their normal lives. After baseline tests, two-way repeated measures ANOVA with contrast testing was conducted using SPSS 22.0. Study results found that physical performance and balance in both EX-BFR and EX groups were significantly improved, and fall index in both EX-BFR and EX groups were significantly decreased. There were no changes in the CON group. In addition, the % change and effect size of all variables in the EX-BFR group were larger than the EX group. So, the results showed that the EX-BFR group had performed more intense exercise caused by restricted blood flow during the training period compared to the EX group. Thus, exercise with BFR training may additionally influence physical performance and balance in elderly females.

• Journal of the Korea Convergence Society
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• v.13 no.4
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• pp.625-634
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• 2022

The objective of this study was to examine the relationship between physical activity (PA) level and functional fitness (FF) parameters in community-dwelling older adults aged 65 or above in Korea. Subjects' (M: 1,645; F: 2,394) PA level were assessed using a questionnaire. The subjects were divided into two groups: one below the recommended level of PA(LPA) and one above the recommended level (PA). PA was further classified by intensity level into medium- and high-intensity PA (MIPA and HIPA respectively) groups. FF was assessed based on six test items representing the following fitness areas: lower and upper body strength, agility and dynamic balance, flexibility, aerobic capacity, coordination, and body composition. Of the subjects, 36% met the recommended level of PA. Both MIPA and HIPA were superior to LPA in all FF items(p<.05). The HIPA group was significantly better in terms of agility and dynamic balance, coordination, and lower body strength (only in women) than was the MIPA group(p<.05). In conclusion, PA above the recommended level is needed to maintain functional fitness. In addition, HIPA seems to promote fall-related functional fitness and should be encouraged when safe and feasible.

• Proceedings of the Korea Water Resources Association Conference
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• 2021.06a
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• pp.80-80
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• 2021

2020년은 장마와 태풍으로 인해 중부 및 남부지방에 폭우가 발생하여 강남역을 비롯한 지하철 역사와 지하 주차장 등 많은 지하시설이 침수되었고, 부산에서는 침수된 지하차도에 진입한 차량의 운전자가 사망하는 등의 사고가 발생하였다. 지하에 설치된 시설들은 침수가 발생할 경우 대부분 출입구를 통해 유입되는 물을 거슬러 대피해야 하므로 낙상과 그로 인한 익사 등 자칫 큰 인명피해를 초래할 수 있어 특별히 주의할 필요가 있다. 대피 여부를 결정하고 그에 필요한 시간을 계산하기 위해서는 안전하게 대피 가능한 최대수심(한계수심)을 결정하는 것이 필요하다. 현재 한계수심을 제시한 여러 연구가 있지만 대부분 소수의 성인만을 대상으로 한 실험 결과이기 때문에 성별, 연령, 체중 등 다양한 유형의 사람을 고려한 대피방법 제시가 필요하다. 이에 본 연구에서는 실험 참가자의 유형(성별, 연령, 체중, 신장)에 따른 대피시간의 차이를 고려한 한계수심을 제시할 수 있도록 하였다. 총 308명이 실험에 참여하였으며, 이중 남성은 164명, 여성은 144명이었다. 참가자의 연령은 14세부터 75세까지이며, 신장은 최소 145cm에서 최대 187cm, 체중은 35kgf에서 110kgf 범위이다. 대피시간은 물이 흘러 내려오는 5.1m 길이의 계단을, 난간을 잡은 채 거슬러 올라가는 시간으로 설정하였으며, 계단 상층부의 수심이 30cm일 때와 40cm일 때(한계수심 조건), 2회 측정하였다. 또한, 측정이 종료된 후, '안전하게 대피 가능할 것으로 예상되는 수심'을 선택하도록 하여 참가자가 체감한 실험 난이도를 간접적으로 확인하고 향후 연구에 활용할 수 있도록 하였다. 수집된 자료를 분석한 결과 여성의 경우 수심 30cm와 40cm의 평균 대피시간이 4초 정도의 차이가 나타났으나, 남성의 경우 유의미한 차이가 나타나지 않았다. 또한 '안전하게 대피 가능할 것으로 예상되는 수심'에 대한 답변으로 다수가 실험의 최대 수심 조건인 40cm 이상을 선택하였다. 이와 같은 결과를 보아, 실험의 난도가 높지 않았다고 예상할 수 있으며, 그 원인은 참가자의 안전을 고려해 실험 조건을 난간을 잡은 채 보행하도록 설정한 것이 한계수심을 증가시키는 결과를 가져왔다고 볼 수 있다. 유형에 따른 대피시간의 차이를 분석하기 위해서는 실험의 한계수심 조건을 높이거나, 난간을 잡지 않고 보행할 수 있도록 안전장치를 추가하는 등, 실험조건의 변화가 필요할 것으로 판단되며, 추가적으로 난간을 잡은 채 보행하는 것이 한계수심을 얼마나 높일 수 있는지에 대한 검토를 통하여 정량적인 대피가능 시간을 제시할 수 있을 것으로 사료된다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.12
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• pp.5909-5919
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• 2012

The purpose of this study was to compare the effects of the intensive ankle joint strategy training on the muscular strength and balancing ability in the elderly women. The subject of this study were 30 elderly women aged from 65 to 80 and randomly assigned to three groups. For 6 weeks, two experimental groups took the training an hour every 3 days of a week. The results that measured the dynamometer, FRT, and SEBT after implementing general lower limbs exercise and the intensive ankle joint strategy training for 6 weeks showed that the changes in the control and experimental group I were not statistically significant while the changes in the experimental group II were statistically significant (p<.05). For the prevention of the elderlies from fall and the treatment approaches, it is deemed to be necessary additional studies on the diverse variables through the intensive training of the ankle strategy.

• Journal of the Korea Convergence Society
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• v.9 no.1
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• pp.103-109
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• 2018

This study was to measure the awareness of the patient safety culture of medical workers in various occupations working in hospitals and tried to be used as useful data. As a result of evaluating department (ward), hospital, immediate supervisor/manager, communication & procedures and frequency of accident reports, the patient safety accidents considered to be the most dangerous, technicians showed high results in the department(ward), nurses showed high results in the immediate supervisor/manager area. Radiological technologists and physical therapists recognized falls and clinical pathologists and nurses recognized before during after the test as the most dangerous patient safety accidents. To raise awareness of patient safety culture, executives and practitioners should create an atmosphere in which practitioners can prioritize patient safety, gain and manage appropriate personnel, manage cooperative systems between workers or departments.

• The Journal of the Convergence on Culture Technology
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• v.6 no.4
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• pp.535-543
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• 2020

The KSA caused an error in deriving the statistical measurement items due to the misconfiguration of the safety variables and sub-modules that constitute the safety statistics framework for external causes of death, and pathogenesis, without considering the academic classification system of the field and area of the disaster/accident. By naming it as a mechanism, it was analyzed that the result of poor statistical validity has arrived. Therefore, in this study, by changing the safety parameters according to the WHO safety definition and setting the sub-modules appropriately, the categories of falls, drowning accidents, and accidents exposed to inanimate mechanical forces are classified as accidents at industrial sites and work in daily life. As a result, by systematically re-establishing the complex group of statistical items of the NSO by deriving the field of disasters/accidents according to the nature of the source of external causes of death and setting the relevant domains academically, statistical validity gets better and It is anticipated to play an important role in determining the direction of safe investment.