• 정보과학회 컴퓨팅의 실제 논문지
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• 제22권4호
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• pp.195-200
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• 2016

스마트 워치, 스마트 밴드 같은 웨어러블 디바이스가 개발됨에 따라, 웨어러블 디바이스 사용자의 건강상태를 측정할 수 있는 생체신호 모니터링 기술이 각광 받고 있다[1]. 하지만 한 개의 웨어러블 디바이스에서 여러 가지 생체신호를 측정하기 위해 웨어러블 디바이스에 여러 가지 생체신호 센서를 내장하게 되면 디바이스 자체 크기와 같은 제한적인 자원 측면에서 문제가 발생한다. 또한 새로운 생체신호 센서를 추가 할 때 문제가 발생한다. 본 논문에서는 웨어러블 디바이스 사용자의 요청이 있을 때 가속도 센서, ECG 센서, PPG 센서를 Cradle형태의 모듈에서 동작시킨 후 사용한 센서에서 측정되는 생체 신호를 실시간으로 수집하여 다른 웨어러블 디바이스로 전송할 수 있는 플러그인(Plug-in) 모듈인 Bio-Cradle을 제안한다. Bio-Cradle은 다른 웨어러블 디바이스에 플러그인하면, 디바이스의 종류에 무관하게 동기화 된 다수 생체신호를 전송할 수 있다. 즉 Bio-Cradle을 사용함으로써, 다수 생체신호의 동시 측정이 가능해지고, 웨어러블 디바이스 내부에 생체신호 센서를 내장 할 필요가 없어진다.

• 사상체질의학회지
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• 제22권4호
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• pp.20-29
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• 2010

1. Objectives Our goal is to observe the feasibility of constitution discrimination from computing quantitative roughness index from dynamic friction coefficients and their gradients with the measurement device of skin friction with 3-Axis load cell sensor. 2. Methods In the traditional Korean medicine, skin diagnosis is one of the examination methods to discriminate Sasang constitution since it was known that Tae-eumin has rough skin, and Soyangin has smooth one. It is based on the skin roughness on the back of one's hand for the discrimination. The measurement device of skin friction with 3-axis load cell sensor has been developed in order to provide quantitative skin roughness through dynamic friction coefficients. The effective interval of the coefficients is obtained from the automatic sampling algorithm to use their curvature and slope. Then, Fisher's discriminant function of them makes the discrimination. 3. Results The success rate of extracting the effective interval was about 90% and the discriminant accuracy between Tae-eumin and Soyangin was 70% and 68% for men and women, respectively. The entire methods showed the possibility to distinguish between Tae-eumin and Soyangin by using stochastic properties of roughness index, which can make the entire system to include the measurement, the computation of the roughness index and the discrimination of constitution automatical. 4. Conclusions The measurement device, the automatic sampling algorithm of dynamic friction coefficients and the constitution discrimination algorithm were developed, respectively, and their combination can become the serial and automatic procedure for quantitative and objective skin diagnosis, which mimics the movement of the Oriental medical doctors' skin diagnosis. It can be applied to healthcare as well as the diagnosis of constitution in a u-Health system soon.

• 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.

• 대한의용생체공학회:의공학회지
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• 제44권6호
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• pp.428-442
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• 2023

In this study, we have a goal to develop usability evaluation guidelines for heuristic-based artificial intelligence-based Software as a Medical Device (SaMD) in the medical field. We conducted a gap analysis between medical hardware (H/W) and non-medical software (S/W) based on ten heuristic principles. Through severity assessments, we identified 69 evaluation domains and 112 evaluation criteria aligned with the ten heuristic principles. Subsequently, we categorized each evaluation domain into five types, including user safety, data integrity, regulatory compliance, patient therapeutic effectiveness, and user convenience. We proposed usability evaluation guidelines that apply the newly derived heuristic-based Software as a Medical Device (SaMD) evaluation factors to the risk management process. In the discussion, we also have proposed the potential applications of the research findings and directions for future research. We have emphasized the importance of the judicious application of AI technology in the medical field and the evaluation of usability evaluation and offered valuable guidelines for various stakeholders, including medical device manufacturers, healthcare professionals, and regulatory authorities.

• 전기학회논문지
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• 제56권9호
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• pp.1680-1687
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• 2007

A hospital room has multiple patient monitoring devices at the bedside to monitor his or her status. However, vital sign monitors, ventilator and other bedside devices are made by a variety of different manufacturers and often cannot easily interface to the hospital information system. Medical environments incorporate complex and integrated data networks to transfer vast amounts of patient information, such as images, waveforms, and other forms of digital data. Hence, to assure interoperability of images, waveforms and patient data, Health Level Seven (HL7) was developed as an international standard to facilitate the communicating and storing of medical data. In this study, we developed middleware capable of receiving data from mCare 300 vital signs monitoring devices and converting the data to HL7 data format. The HL 7 middleware streamline clinical workflow and support patients. Therefore, clinical expertise are empowered to respond to dynamic healthcare situation as soon as they emerged, and consequently quality of care while helping to reduce the length of a patient's stay in a hospital.

• 한국IT서비스학회지
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• 제15권4호
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• pp.41-62
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• 2016

In Internet of Things (IoT) era, more diverse types of information are collected and the environment of information usage, distribution, and processing is changing. Recently, there have been a growing number of cases involving breach and infringement of personal information in IoT services, for examples, including data breach incidents of Web cam service or drone and hacking cases of smart connected car or individual monitoring service. With the evolution of IoT, concerns on personal information protection has become a crucial issue and thus the risk analysis and management method of personal information should be systematically prepared. This study shows risk factors in IoT regarding possible breach of personal information and infringement of privacy. We propose "a risk analysis framework of protecting personal information in IoT environments" consisting of asset (personal information-type and sensitivity) subject to risk, threats of infringement (device, network, and server points), and social impact caused from the privacy incident. To verify this proposed framework, we conducted risk analysis of IoT services (smart communication device, connected car, smart healthcare, smart home, and smart infra) using this framework. Based on the analysis results, we identified the level of risk to personal information in IoT services and suggested measures to protect personal information and appropriately use it.

• 전기학회논문지
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• 제63권1호
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• pp.173-178
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• 2014

In this study, the new color image processing algorithms with an android-based mobile device are developed to detect the abnormal color densities in a skin image and interpret them as the vitiligo lesions. Our proposed method is firstly based on transforming RGB data into HSI domain and segmenting the imag into the vitiligo-skin candidates by applying Otsu's threshold algorithm. The structure elements for morphological image processing are suggested to delete the spurious regions in vitiligo regions and the image blob labeling algorithm is applied to compare RGB color densities of the abnormal skin region with them of a region of interest. Our suggested color image processing algorithms are implemented with an android-platform smartphone and thus a mobile device can be utilized to diagnose or monitor the patient's skin conditions under the environments of pervasive healthcare services.

• 대한임베디드공학회논문지
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• 제6권4호
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• pp.209-214
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• 2011

This study suggests a Healthcare System for elderly and disabled who have mobility impairment and use a wheelchair for long time. Seating long time in a wheelchair without reducing pressure causes high risk of developing pressure sores. Pressure sores come with great deal of pain and often lead to develop complication. Not only it takes time and effort to treat pressure sores but also increases medical expenses. Therefore, we will develop a device to help to prevent pressure sores by measuring pressure distribution while seating in a wheelchair and wirelessly send information to user device to check pressure distribution in real time. The equipment to measure body pressure is composed of FSR sitting mat which is a sensor measuring part and an user terminal which is a monitoring part. The designed mat is matrix formed FSR sensor to measure pressure. The sensor send measured data to the controller which is connected to the end of the mat, and then the collected data are sent to an user terminal through a bluetooth. Developing a pressure monitoring system will help to prevent those who have mobility impairment to manage pressure sores and furthermore relieve their burden of medical expenses.

• 대한치과의사협회지
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• 제57권6호
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• pp.316-324
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• 2019

The new medical technology assessment system has a basic goal of protecting the public's health rights and promoting the development of the new medical technology with safe and effective medical technology that has been scientifically proven. The purpose of this study is to contribute to the activation of the new medical technology evaluation system by analyzing the application cases of the dental field after the implementation of the new medical technology evaluation system and proposing an efficient approach to approach the new medical technology evaluation system. The number of related literature and medical technology evaluation results are not significant in dental applications, the number of cases and the length of follow-up period of the relevant medical technology adopted as the new medical technology was far higher. As the speed of medical technology development increases, medical technology is expected to develop in the dental field as well. To introduce the medical technology to the clinical site, access to the correct direction of evidence is required to collect and objectify data at the medical site in order to prepare a literary basis for the medical technology.

• 대한임베디드공학회논문지
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• 제17권1호
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• pp.1-7
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• 2022

The number of patients with many complications grows with the increase of aging population. As the elders and severely ill patients spend most of their time in bed, it leads to Pressure Injuries (PI) such as bedsores. Unfortunately, there is no method to automatically detect changes in patient's posture which leads to the need for a caregiver every set of times when the patient needs to be moved. Many studies are conducted to solve this inefficient problem. Yet, these studies require costly devices or use methods that disturb patient's sleeping environment. Those methods are mostly hard to implement in practice due to these reasons. We propose a method to detect posture using a three-axis acceleration sensor from the wrist band. We developed a wearable watch that measures sleep-related data. We analyzed 40 people's sleep data with a wearable module and watch to measure their postures such as supine, left-side, and right-side. Then, we compared the classified posture from the watch with the wearable module and achieved 90% accuracy. Therefore, we concluded that only by using the wearable watch, we can detect the sleeping position without any new equipment or system to diagnose the patients without discomfort during their daily lives.