• Current Optics and Photonics
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• 제3권1호
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• pp.46-53
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• 2019

Monte Carlo simulations were performed for a three-dimensional tissue model with and without an embedded large vessel, to understand how varying vessel geometry affects surface light distribution. Vessel radius was varied from 1 to 5 mm, and vessel depth from 2 to 10 mm. A larger difference in surface fluence rate was observed when the vessel's radius increased. For vessel depth, the largest difference was seen at a depth of approximately 4 mm, corresponding to human wrist region. When the vessel was placed at depths greater than 8 mm, very little difference was observed. We also tested the feasibility of using two source-detector pairs, comprising two detectors distinctly spaced from a common source, to noninvasively measure blood-scattering changes in a large vessel. High sensitivity to blood-scattering changes was achieved by placing the near detector closer to the source and moving the far detector away from the source. However, at longer distances, increasing noise levels limited the sensitivity of the two-detector approach. Our results indicate that the approach using two source-detector pairs may have potential for quantitative measurement of scattering changes in the blood while targeting large vessels near the human wrist region.

• 디지털산업정보학회논문지
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• 제6권3호
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• pp.91-101
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• 2010

By using the U-Healthcare environment, it is possible to receive the health care services anywhere anytime. However, since the user's personal information can be easily exposed in the U-Healthcare environment, it is necessary to strengthen the security system. This thesis proposes the technique which can be used to protect the personal medical records at hospital safely, in order to avoid the exposure of the user's personal information which can occur due to the frequent usage of the electronic chart according to the computerization process of medical records. In the proposed system, the following two strategies are used: i) In order to reduce the amount of the system load, it is necessary to apply the partial encryption process for electronic charts. ii) Regarding the user's authentication process for each patient, the authentication number for each electronic chart, which is in the encrypted form, is transmitted through the patient's mobile device by the National Health Insurance Corporation, when the patient register his or her application at hospital. Regarding the modern health care services, it is important to protect the user's personal information. The proposed technique will be an important method of protecting the user's information.

• International journal of advanced smart convergence
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• 제5권3호
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• pp.32-39
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• 2016

With the help of a small wearable device, patients reside in an isolated village need constant monitoring which may increase access to care and decrease healthcare delivery cost. As the number of patients' requests increases in simultaneously manner, the web service gateway located in the village hall encounters limitations for performing them successfully and concurrently. The gateway based RESTful technology responsible for handling patients' requests attests an internet latency in case a large number of them submit toward the gateway increases. In this paper, we propose the design tasks of the web service gateway for handling concurrency events. In the procedure of designing tasks, concurrency is best understood by employing multiple levels of abstraction. The way that is eminently to accomplish concurrency is to build an object-oriented environment with support for messages passing between concurrent objects. We also investigate the performance of event-driven architecture for building web service gateway using node.js. The experiments results show that server-side JavaScript with Node.js and MongoDB as database is 40% faster than Apache Sling. With Node.js developers can build a high-performance, asynchronous, event-driven healthcare hub server to handle an increasing number of concurrent connections for Remote Healthcare Monitoring System in an isolated village with no access to local medical care.

• International Journal of Computer Science & Network Security
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• 제22권1호
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• pp.269-275
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• 2022

Public healthcare has recently become an issue of great importance due to the exponential growth in the human population, the increase in medical expenses, and the COVID-19 pandemic. Speed is one of the crucial factors in saving life, particularly in case of heart attack. Therefore, a healthcare device is needed to continuously monitor and follow up heart health conditions remotely without the need for the patient to attend a medical center. Therefore, this paper proposes a portable electrocardiogram (ECG) monitoring system to improve healthcare for heart attack patients in both home and ambulance settings. The proposed system receives the ECG signals of the patient and sends the ECG values to a MySQL database on the IoT-cloud via Wi-Fi. The signals are displayed as an ECG data chart on a webpage that can be accessed by the patient's doctor based on the HTTP protocol that is employed in the IoT-cloud. The proposed system detects the ECG data of the patient to calculate the total number of heartbeats, number of normal heartbeats, and the number of abnormal heartbeats, which can help the doctor to evaluate the health status of the patient and decide on a suitable medical intervention. This system therefore has the potential to save time and life, but also cost. This paper highlights the five main advantages of the proposed ECG monitoring system and makes some recommendations to develop the system further.

• 전자통신동향분석
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• 제39권4호
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• pp.73-81
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• 2024

As the demand for a healthy life increases and the use of information technology expands, interest in digital healthcare has increased. Among the digital healthcare technologies, digital therapeutics (DTx), which are capable of disease prevention, management, and treatment rather than simple healthcare, are expected to play a key role in future healthcare services. As interest in untact remote treatment that can minimize the risk of viral infection has rapidly increased since the spread of COVID-19, the application of DTx has received much attention because it can partially replace face-to-face treatment for mental illnesses, chronic diseases, and other diseases, reducing concerns about infection. In addition, because of the nature of software, DTx have lower toxicity and fewer side effects than existing treatments and do not require manufacturing, transportation, and storage like general medicines. Hence, they can be supplied in large quantities at low cost and have the advantage of lowering medical costs. However, despite these advantages, it has been pointed out that there are difficulties in investment and universal use because of the complexity of pricing and malpractice compensation. In other words, if it is difficult to prove and measure the improvements in disease management and treatment using DTx and it takes a considerable amount of time and money to do so, it will be difficult to attract investment from stakeholders such as medical providers and pharmaceutical companies. In this paper, we examine the domestic and global application status and development trends of DTx and determine the relevant implications.

• 디지털융복합연구
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• 제10권2호
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• pp.141-146
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• 2012

최근 의료기술은 IT 기술과 융합하여 언제, 어디서나 의료 서비스를 받을 수 있는 유헬스케어 서비스가 각광을 받고 있다. 그러나, RFID 기술을 유헬스시스템에 적용한 체내삽입장치는 환자의 민감한 생체정보가 쉽게 제3자에게 유출되어 프라이버시 침해에 쉽게 노출될 수 있는 문제점이 있다. 이 논문에서는 체내삽입장체에 RFID 기술을 접목하여 환자의 생체정보가 불법적인 목적으로 시용되지 않는 RFID 기반의 유헬스케어 인증 프로토콜을 제안한다. 제안 프로토콜은 관리자와 병원관계자의 랜덤수를 조합하여 환자의 생체정보의 무결성을 보장하며, 연속번호 $SEQ$와 타임스탬프 $T$을 사용하여 체내삽입장치와 관리자, 관리자와 병원관계자를 서로 동기화하고 있다. 또한, 불법적인 공격자로부터 사용자의 프라이버시를 보호하도록 환자의 보안 인식자를 관리자(=위장자)에서 관리함으로써 환자의 생체정보 유출을 예방한다.

• 한국융합학회논문지
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• 제8권7호
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• pp.175-181
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• 2017

본 연구는 스마트 밴드 구매에 있어서 구매자들이 어떤 요인으로 구매하는지를 알아보는 것에 목적을 두었다. 특히 요즈음 현대인들의 가장 큰 관심사 중 하나인 개인 헬스케어를 중심으로 스마트 밴드에 대한 인식을 조사하고 사용자들의 요구를 알아보기 위한 연구를 진행하였다. 스마트 밴드는 현재 웨어러블 디바이스 시장에서 가장 높은 점유율을 나타내는 제품이다. 이것은 현대인들이 얼마나 자신의 개인 헬스케어에 관심을 쏟고 있는지에 관한 반증이라고 볼 수 있다. 따라서 본 연구는 스마트 밴드를 사용하고 있지 않은 사람들을 대상으로 어떠한 요소를 가장 고려하여 스마트 밴드를 구매할 것인가에 대해 알아보았다. 그 결과 스마트 밴드 구매에 있어서 스마트 밴드의 개인 헬스케어 기능보다는 제품의 외관적인 디자인과 하드웨어적인 성능을 더욱 중요시한다고 알 수 있었고 근본적으로 스마트 밴드 자체의 필요성을 느끼지 못했다. 이 연구로 인해 더 다양한 스타일의 스마트 밴드의 출시를 통해 모든 사용자들이 만족할 수 있는 제품 개발과 연구가 계속해서 이루어지길 희망한다.

• 융합신호처리학회논문지
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• 제20권1호
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• pp.45-50
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• 2019

모바일 헬스케어 디바이스에서 가장 많이 사용되는 PPG 신호는 디바이스 사용자의 움직임의 영향에 따라 심박수 측정의 정확도가 떨어진다. 그 이유는 사용자의 동잡음의 주파수 대역이 PPG 신호의 주파수 대역과 겹쳐 있기 때문이다. 이러한 동잡음을 제거하기 위해 주파수 분석법, 가속도 센서 적용 등의 다양한 방법들이 연구되어 우수한 성능을 제시하였지만, 저가의 헬스케어 디바이스에 이들 필터법을 적용함에 있어 많은 연산처리 시간과 센서 가격 측면 때문에 적용하기가 어렵다. 이러한 문제점을 해결하기 위해 본 연구에서는 실시간으로 보다 정확한 심박수를 추출하기 위해 퍼지추론 시스템과 적응노치 필터를 이용한 PPG 신호처리 기법을 제안하고 그 성능을 평가하였다. 그 결과, 기존의 방법보다 우수한 결과를 보였으며, 이 결과를 토대로 제안된 방법을 모바일 헬스케어 디바이스 설계에 적용한다면 실시간으로 보다 정확한 심박수 측정이 가능할 것이다.

• Journal of Information Technology Applications and Management
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• 제26권1호
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• pp.21-38
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• 2019

This study starts from the question, "Are people of the age 60 and over equally 'old?' "As the aging population has rapidly become a global issue, it is a timely question to think about whether it is appropriate to classify people aged 60 and over as senior citizens monolithically based on their chronological age. Thanks to the advancement of medical technology and ever-increasing life expectancy, there may be more differences than we thought in terms of cognitive and behavioral patterns among the elderly population. In order to further investigate this question, this study focuses on technology acceptance behavior of 132 participants over the age of 60 towards a wearable healthcare device. The results show that there were interesting behavioral differences among participants depending on their cognitive capabilities. More specifically, participants with high cognitive capability (Superagers) consider the usefulness and the social aspects (social norm and image) of using wearable healthcare technology. Whereas for those with relatively low cognitive capability (non-Superagers), usefulness of using the technology was not a significant factor, and they mainly considered social norm and image. Our findings imply that the current monolithic application of chronological age to classify the elderly population should be carefully reconsidered because people aged over 60 years old may not always share homogeneous cognitive and behavioral patterns.

• 디지털정책학회지
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• 1권1호
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• pp.15-20
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• 2022

최근 헬스케어 분야는 다양한 산업 분야의 요구사항을 반영하여 서비스 품질을 향상시킬 수 있는 모델을 개발하려고 노력하고 있다. 본 논문에서는 헬스케어 서비스 향상을 위해서 5G 환경에서 사용자의 헬스케어 정보를 실시간으로 처리할 수 있는 행동인터넷(IoB, Internet of Behavior) 환경 모델을 제안한다. 제안 모델은 사용자의 헬스케어 정보를 딥러닝을 통해 분석한 후 건강 상태를 실시간으로 확인할 수 있도록 하는 것이 목적이다. 이때, 사용자의 생체 정보는 휴대용 의료 장비에 부착된 통신 장비를 통해 전달되며, 사용자 인증은 부착된 IoB 장치에 사전 입력된 정보를 통해 수행된다. 기존 IoT 헬스케어 서비스와의 차별점은 사용자의 습관 및 행동 패턴을 분석해서 디지털 데이터화 하는 점과 수집된 데이터를 기반으로 사용자의 헬스케어 서비스 향상을 위한 사용자 특정 행동을 유도할 수 있다는 점이다.