• 한국산업보건학회지
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• 제33권2호
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• pp.93-102
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• 2023

Objectives: With the evolution of direct reading sensors, it is possible to monitor several substances through telecommunication. However, there are some limitations on the use of direct reading technologies in the Occupational Safety and Health Act in South Korea, which only applies to detector tubes, noise, heat, and carbon monoxides. The number of chemicals and their amount of use have been continuously increasing in South Korea. The Ministry of Employment and Labor (MoEL) has concerns about worker's health because exposure is only covered for about 1.2% of all distributed chemicals. Using a direct reading monitor with photoionization detectors (PID-DRMs), gases and vapors chemicals can be measured. Based on the data, business owners are able to create corrective strategies, provide better working routines, and select correct respiratory equipment. PID-DRMs are less expensive and easier to handle for an owner voluntarily controlling chemicals emitted in the workplace. However, there are several limitations on using these PID-DRMs to the degree that the MoEL has not been able to select a legal monitor. The aim of this study was to review previous studies related to PID-DRMs and identify the characterization and limitation on PID-DRMs. Methods: To search for related studies on PID-DRMs, key words were used including direct reading monitors/instruments and/or photoionization detectors. Through that, four domestic and 15 international studies were reviewed. Results: Studies on PID-DRMs were conducted by chamber (enclosed, dynamic, walk-in) and in the field (experimental environment, actual environment). The concentration of PID-DRMs and charcoal tubes were compared for a single substance or mixture, or within the PID-DRMs. There was a high correlation between the two concentrations, but it did not meet the accuracy criteria (95% confidence interval, within 25%) of the NIOSH technical report (2012). In addition, differences in measured values occurred according to environmental factors (temperature, humidity) and high concentration, and concentration values tended to be underestimated due to contamination of the sensor. As a way to improve the accuracy of PID concentration, it was proposed to use correction factors, charcoal tube-based correction factors, or to calibrate the PID-DRMs in the same environment as the workplace. Conclusions: PID-DRMs can likely be used by business owners for the purpose of voluntarily managing the workplace environment, and it is expected that it will be possible to use them as legal equipment if a PID sensor can be upgraded and the limitations of the sensor (temperature, humidity, high concentration evaluation, sensor pollution) can be overcome in the near future.

• 한국정밀공학회지
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• 제29권12호
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• pp.1313-1320
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• 2012

Condition monitoring of the reciprocating compressor is important task. As a traditional method, health monitoring system of refrigerator depends on decision of a skilled person based on his experience. However, the skilled person cannot monitor all the compressors completely. If a sampled compressor is faulty, thousands of compressors manufactured at that place are regarded as faulty compressors. Therefore it is necessary to monitor all compressors in the production line. In the paper real time health monitoring system is developed based on high order time frequency method and artificial neural network. The system is installed in the mass production line. The result of the application has been very successful, and currently the system is working very well on the production line.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 제37회 하계학술대회 논문집 D
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• pp.2161-2162
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• 2006

In this study, we developed five mobile units and an integrated system which can manage vital signs from each unit using Bluetooth wireless communication. The five kinds of mobile unit were so designed that each has different function to be applied according to the condition of patient properly. The mobile units can measure ECG signal of single or 12 channel, blood pressure, pulse and SpO2 signal from a patient. Also, to reduce the uncomfortable measurement, several types of units such as belt type, wrist type and necklace type were designed. Our proposed system can integrate and monitor several biological signals from different patient by using Bluetooth wireless communication simultaneously. The developed system was evaluated in the simulated emergent situation and showed the system can monitor 5 patients in maximum according to the data quality. It showed the possibilities that the developed system can be used effectively for emergency situation or in- or out-hospital transport of patient. In future, with the combination of mobile communication technique, a patient who is in emergency situation can be provided with proper first-aid and a doctor can pile information of patient and give better diagnosis and treatments.

• Journal of Communications and Networks
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• 제17권4호
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• pp.419-427
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• 2015

There have been increases in the elderly population worldwide, and this has been accompanied by rapid growth in the health-care market, as there is an ongoing need to monitor the health of individuals. Wireless body area networks (WBANs) consist of wireless sensors attached on or inside the human body to monitor vital health-related problems, e.g., electrocardiograms (ECGs), electroencephalograms (EEGs), and electronystagmograms (ENGs). With WBANs, patients' vital signs are recorded by each sensor and sent to a coordinator. However, because of obstructions by the human body, sensors cannot always send the data to the coordinator, requiring them to transmit at higher power. Therefore, we need to consider the lifetime of the sensors given their required transmit power. In the IEEE 802.15.6 standard, the transmission topology functions as a one-hop star plus one topology. In order to obtain a high throughput, we reduce the transmit power of the sensors and maintain equity for all sensors. We propose the multiple-hop transmission for WBANs based on the IEEE 802.15.6 carrier-sense multiple-access with collision avoidance (CSMA/CA) protocol. We calculate the throughput and variance of the transmit power by performing simulations, and we discuss the results obtained using the proposed theorems.

• Safety and Health at Work
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• 제9권1호
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• pp.30-41
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• 2018

Background: The purpose of the work is to develop a system that allows processing of information for analysis and industrial risk management, to monitor the level of industrial safety and to perform necessary measures aimed at the prevention of accidents, casualties, and development of professional diseases for effective management of industrial safety at hazardous industrial sites. Methods: Risk assessment of accidents and incidents is based on expert evaluations. Based on the lists of criteria parameters and their possible values, provided by the experts, a unified information and analytical database is compiled, which is included in the final interrogation questionnaires. Risk assessment of industrial injuries and occupational diseases is based on statistical methods. Results: The result of the research is the creation of Guidelines for risk management on hazardous industrial sites of the Republic of Kazakhstan. The Guidelines determine the directions and methods of complex assessment of the state of industrial safety and labor protection and they could be applied as methodological basis at the development of preventive measures for emergencies, casualties, and incidents at hazardous industrial sites. Conclusion: Implementation of the information-analytical system of risk level assessment allows to analyze the state of risk of a possible accident at industrial sites, make valid management decisions aimed at the prevention of emergencies, and monitor the effectiveness of accident prevention measures.

• 한국전문물리치료학회지
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• 제26권3호
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• pp.106-114
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• 2019

Background: It is difficult to assess whether community-dwelling frail older adults may remain pre-frail status or improve into a robust state without being directly checked by health care professionals. The health information perceived by older adults is considered to be one of best sources of potential concerns in older adult population. An online measurement system combined with item response theory (IRT) and computer adaptive testing (CAT) methods is likely to become a realistic approach to remotely monitor physical activity status of frail older adults. Objects: This article suggests an approach to provide a precise and efficient means of measuring physical activity levels of community-dwelling frail older adults. Methods: Article reviews were reviewed and summarized. Results: In comparison to the classical test theory (CTT), the IRT method is empirically aimed to focus on the psychometric properties of individual test items in lieu of the test as a whole. These properties allow creating a large item pool that can capture the broad range of physical activity levels. The CAT method administers test items by an algorithm that select items matched to the physical activity levels of the older adults. Conclusion: An online measurement system combined with these two methods would allow adequate physical activity measurement that may be useful to remotely monitor the activity level of community-dwelling frail older adults.

• 한국산학기술학회논문지
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• 제13권11호
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• pp.5518-5524
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• 2012

오늘날 세계는 다양한 패러다임과 기술이 발전하는 시대에 도래해 왔고 여러 분야의 기술이 융합되어 새로운 분야의 기술이 나타나고 있다. 그 중 하나인 u-Health 시스템은 USN(Ubiquitous Sensor Network) 기반의 여러 생체 센서의 데이터를 이용하여 사용자가 언제 어디서든 모니터링을 할 수 있는 시스템을 말한다. 이러한 u-Health 시스템은 과거에 유선으로 센서 데이터를 수집하고 PC(Personal Computer)만으로 모니터링이 가능했지만, IT기술이 발전함에 따라서 센서 데이터를 무선으로 취득하고, 언제 어디서 모니터링이 가능한 시스템으로 변화되고 있다. 본 연구는 사용자의 생체 데이터를 취득하고 이 정보를 Jena 추론 서비스를 통해 사용자가 응급 상황이 발생하면 언제 어디서든 사용자의 생체 데이터를 확인 할 수 있도록 웹 서비스와 스마트폰 애플리케이션을 제공하는 방법을 제공한다.

• 한국정보통신학회논문지
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• 제16권9호
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• pp.1970-1976
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• 2012

현재 홈 헬스케어시스템은 의료기기와의 통합을 위한 표준화 기술이 미비한 상황이며 특히, 다양한 개인의료기기들의 호환성 제공과 시스템 간 상호 운용성 확보를 위한 보다 구체적인 솔루션이 필요하다. 본 논문에서는 핵심기술 요소인 ISO/IEEE 11073, HL7 표준 적용을 통하여 스마트 게이트웨이 기반 모바일 헬스케어시스템을 설계 및 구현하고자 한다. 이를 위해, 심박측정계, 산소포화도 측정계, 심전도 측정계 등을 헬스케어 의료기기로 구성하였다. 아울러, 본 논문에서는 Android 4.x Bluetooth HDP(Health Device Profile)를 기반으로 continua health alliance 표준의 의료기기 연결성을 제공하며, 스마트폰 환경에서 의료기기를 통해 얻어진 데이터를 HL7 표준을 기반으로 사용자와 의료인에게 제공하여 사용자의 건강 평가/관리를 위한 진단지원시스템을 가능하게 하는 헬스케어시스템을 구현하고자한다.

• 한국컴퓨터정보학회논문지
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• 제27권11호
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• pp.157-163
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• 2022

이 논문에서는 블루투스 건강기기 프로파일(HDP) 기반 스마트폰 시스템을 개발하여 고양이에서 많이 발생하는 비뇨기계 질환의 조기 발견에 활용하는 것을 제안하고자 한다. 이에 우리는 블루투스 HDP를 기반으로 소변검사 결과를 해석할 수 있는 고양이 활동, 화장실 사용, 요로 질환 및 건강 상태를 모니터링할 수 있는 장치 및 모바일 애플리케이션 시스템(Mycatner®)을 개발하였고 고양이의 건강 상태 모니터링에 활용 가능함을 평가하였다. 이 시스템의 특징은 첫째, 고양이 배뇨 횟수를 측정하여 요로계 질병이 의심되는 비정상 상태를 조기에 감별할 수 있고, 둘째, 소변 검사지로 미리 검사하여 동물병원과 공유할 수 있어 시간과 비용을 절감할 수 있고, 셋째, 이 기술을 당뇨병 등 다른 다양한 고양이 질환에 응용 가능한 특성을 지니고 있다. 이로써 고양이의 비뇨기 건강 상태를 무선으로 모니터링할 수 있는 장치는 우리의 식견으로는 최초로 개발한 것으로 평가된다.

• Tuberculosis and Respiratory Diseases
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• 제86권1호
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• pp.23-32
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• 2023

Everyone is aware that air and environmental pollutants are harmful to health. Among them, indoor air quality directly affects physical health, such as respiratory rather than outdoor air. However, studies that have examined the correlation between environmental and health information have been conducted with public data targeting large cohorts, and studies with real-time data analysis are insufficient. Therefore, this research explores the research with an indoor air quality monitoring (AQM) system based on developing environmental detection sensors and the internet of things to collect, monitor, and analyze environmental and health data from various data sources in real-time. It explores the usage of wearable devices for health monitoring systems. In addition, the availability of big data and artificial intelligence analysis and prediction has increased, investigating algorithmic studies for accurate prediction of hazardous environments and health impacts. Regarding health effects, techniques to prevent respiratory and related diseases were reviewed.