• 한국멀티미디어학회논문지
• /
• 제12권12호
• /
• pp.1778-1786
• /
• 2009

Many sensor network applications have been developed for smart home, disaster management, and a wide range of other applications. These applications, however, generally assume a fixed base station as well as fixed sensor nodes. Previous research on sensor networks mainly focused on efficient transmission of data from sensors to fixed sink nodes. Recently there has been active research on mobile sink nodes, sink mobility is one of the most comprehensive trends for information gathering in sensor networks, but the research of an environment where both fixed sink nodes and mobile sinks are present at the same time is rather scarce. This paper proposes a scheme for context-aware by ubiquitous devices with the sink functionality added through fixed sinks under a previously-built, cluster-based multi-hop sensor network environment. To this end, clustering of mobile devices were done based on the fixed sinks of a previously-built sensor network, and by using appropriate fixed sinks, context gathering was made possible. By mathematical comparison with TTDD routing protocol, which was proposed for mobile sinks, it was confirmed that performance increases by average 50% in energy with the number of mobile sinks, and with the number of movements by mobile devices.

• 한국멀티미디어학회논문지
• /
• 제17권5호
• /
• pp.640-653
• /
• 2014

Recently medical consumers pursue high leveled quality of life through active promotion, prevention, management activity of health as the importance of health during home life is emerged to meet the aging society and chronic diseases. In addition, people are directed to the m-Health for managing yourself their health by using smartphone and various personal health devices, if necessary transmits health data to the physician himself. In the previous studies, m-Health Application were developed and applied in the real clinical environment by adopting the medical information standards was rarely conducted. Therefore, in this study, the m-Health application platform was developed. Developed application was communicate with IEEE 11073 standard protocol using the Bluetooth Health Device Profile in personal health device via smart phone to process blood pressure information, and it converted to HL7 V2.6 ORU_R01 message for send to remote medical server. In addition, we tested the interoperability and safety of the developed application for 23 inpatient and 17 outpatient at D University Hospital. As a result, the blood pressure information has been transmitted without error.

• 한국정보처리학회:학술대회논문집
• /
• 한국정보처리학회 2019년도 추계학술발표대회
• /
• pp.288-290
• /
• 2019

해가 갈수록 스마트홈을 구성하는 다양한 IoT 상품들이 출시되고 있고 이것들을 통합 관제하기 위한 IoT 허브(gateway) 등의 제어 장치들이 필요해 지고 있다. 구글의 'Google home', 아마존의 'Echo' 등이 대표적이다. 그러나 이러한 제어 장치들은 클라우드 기반으로 동작되기 때문에 비용이 발생하고 개인으로부터 생성되는 민감한 개인 데이터들의 보관방법에 대한 다양한 문제들을 내포하고 있다. 본 연구팀은 독립형 스마트 IoT 허브 개발을 통해 개인정보를 보호하고 다양한 IoT 단말기들을 손쉽고 간편하게 제어하고자 하였다. 그리고 IoT 단말기와 연결된 센서의 실시간 모니터링 및 분석을 인공지능 기술인 강화 학습 기술을 이용해 구현할 수 있었다. 네트워크 끊김, 고장 등 IoT 단말기 들의 다양한 통신값을 분석하고 이를 기반으로 안정적이고 효율적인 제어를 가능할 수 있게 되었다. IoT 단말기는 아두이노를 이용했으며 스마트 IoT 허브는 라즈베리 파이로 구현해 개인정보를 보다 안전하게 보호하고 다양한 IoT 단말기를 모니터링 하고 제어할 수 있는 독립형 IoT 허브를 설계하고 구현할 수 있었다.

• 한국정보처리학회:학술대회논문집
• /
• 한국정보처리학회 2019년도 춘계학술발표대회
• /
• pp.174-177
• /
• 2019

최근 ICT(Information Communications Technologies)의 발전과 센서 제조 공정의 발전을 통해 저용량, 경량 디바이스를 이용한 스마트 홈 시장이 성장하고 있다. 특히 스마트 홈 IoT의 환경은 모든 사물을 인터넷으로 연결하고 상호 통신을 통해 다양하고 많은 양의 정보를 수집하여 일상생활을 편리하게 해주는 IoT(Internet of Things)가 계속 증가하고 있다. 하지만, 이러한 증가량과 함께, 스마트 홈 환경에서 대한 기술표준화가 이루어지지 않았으며 원활한 서비스 제공 뿐만 아니라 보안 문제가 발생하고 있다. 특히, 이기종 네트워크, 디바이스를 사용하는 스마트 홈 IoT의 경우 다양한 인증 방법이 존재하며, 이에 따른 취약점이 발생하게 된다. 보안 취약점을 이용한 공격으로 개인정보 유출이나 경제적 손실 등 피해를 발생시키고 있으며, 추후 인명피해까지 발생할 수 있다. 따라서, 본 논문에서는 스마트홈 환경의 IoT 보안 방안에 대해 알아보고, 관련 보안사고의 사례 및 인증 기술을 살펴봄으로써 미래 스마트 홈 IoT 보안 기술의 발전과 적합한 보안 대책과 보안 취약점에 대한 보안 체계를 마련하는 것에 도움이 될 것이다.

• 한국정보통신학회:학술대회논문집
• /
• 한국정보통신학회 2014년도 추계학술대회
• /
• pp.88-90
• /
• 2014

최근 스마트 TV가 방송과 통신을 결합하고 융합하여 보다 다양한 콘텐츠를 제공하면서 헬스케어, 스마트 홈으로 서비스 영역을 확장시킬 수 있는 보다 능동적인 매체로 부각되면서 스마트 헬스케어 분야에 적극적으로 활용될 것으로 기대되고 있다. 그러나 현재 헬스케어 서비스는 대부분의 개인건강기기에서 사용자의 신체를 측정하고 확인하기 위해서는 건강기기 제조사별로 존재하는 고유의 인터페이스를 통해서만 확인이 가능하며 스마트 TV 환경에서 헬스케어 서비스를 제공하기 위해서는 스마트 TV의 특징을 고려한 통합 게이트웨이 및 건강관리 애플리케이션이 필요하다. 따라서 본 논문에서는 스마트 TV 환경에 따른 헬스케어 서비스를 제공하기 위해 Bluetooth HDP를 활용한 통합 게이트웨이를 설계하고 이를 기반으로 홈 헬스케어 시스템을 구현하고자 한다.

• International journal of advanced smart convergence
• /
• 제8권1호
• /
• pp.176-183
• /
• 2019

Rhyme of Truce is an educational program that helps you develop the ability to cope with cyber violence rightly. we aim to produce educational contents that will last a long time in the memory of specially children. By combining the room escape game and Leap motion / VR, the program reflects the user's motion and action in real time. The Keyboard Worrier comes into contact with the user and causes violence, and the user who is attacked by the monster see several negative messages written in red and hears abuses sound. Users enter the virtual space decorated as the cyber world. They can experience cyber-violence indirectly but vividly, and if language violence, which has been overlooked and recognized only as "letters", is executed offline, it will directly wonder if cyber-violence should also be regarded as a means of violence. Users have the opportunity to cope with violence autonomously. When a user is attacked by an in-game monster, there are two ways to choose from. First, fighting against with a keyboard (which is a symbol of language violence) just like a monster. Second, report the abuser to cyber bureau police. Both methods make them to escape the room, but when they get out of the room and return to the home and read the message through the monitor, users can recognize which action was right for.

• ETRI Journal
• /
• 제40권6호
• /
• pp.745-758
• /
• 2018

A wide range of studies in various disciplines has focused on the Internet of Things (IoT) and cyber-physical systems (CPS). However, it is necessary to summarize the current status and to establish future directions because each study has its own individual goals independent of the completion of all IoT applications. The absence of a comprehensive understanding of IoT and CPS has disrupted an efficient resource allocation. To assess changes in the knowledge structure and emerging technologies, this study explores the dynamic research trends in IoT by analyzing bibliographic data. We retrieved 54,237 keywords in 12,600 IoT studies from the Scopus database, and conducted keyword frequency, co-occurrence, and growth-rate analyses. The analysis results reveal how IoT technologies have been developed and how they are connected to each other. We also show that such technologies have diverged and converged simultaneously, and that the emerging keywords of trust, smart home, cloud, authentication, context-aware, and big data have been extracted. We also unveil that the CPS is directly involved in network, security, management, cloud, big data, system, industry, architecture, and the Internet.

• 대한간호학회지
• /
• 제49권3호
• /
• pp.254-262
• /
• 2019

Purpose: This study aimed to explore the environmental factors affecting childhood obesity using photovoice from the perspectives of students, parents, and teachers in the community. Methods: Six school students, seven parents, and seven school teachers completed an assignment requiring them to take 24 pictures and participate in group discussions. After training session, the participants were asked to take pictures associated with food and physical activity environments related to childhood obesity at home, school, and within their communities for two weeks and to submit the pictures with records. Each group had four sessions for discussion. Results: School cafeteria, convenience stores near schools, instant food and fast food joints, food delivery, and high-calorie snacks comprised the food environmental factors. Lack of physical activity classes at school, commuting by car, barriers to physical activity, and use of smart-phone were environmental factors that inhibited physical activity. Conclusion: To reduce childhood obesity, the creation of a supportive environment for encouraging the consumption of healthy foods and enhancing physical activity should be considered. Modifications of and improvement to the obesogenic environment might be a good strategy to prevent and reduce childhood obesity.

• 대한건축학회논문집:계획계
• /
• 제34권11호
• /
• pp.67-74
• /
• 2018

With the rapid increase in the elderly population, numerous problems arise related to the decreased cognitive function such as the declines of reaction time and concentration which are both resulting from ageing. Recently, ICT-based smart home and other residential services are being developed as a means of complementing human cognitive functions, but the elderly, who are in most cases digital-illiterate, find it hard to utilize these tools actively and if so it usually takes longer time and endeavor for the elderly to be familiarized with ICT devices. In this context, this study suggests a configuration of the holographic system in houses that complement the cognitive function of the elderly with the consideration of the interaction with the vision which is a critical function in the cognitive process. The method of this study consists of a literature review on topics including the characteristics of the cognitive function among the elderly, holographic technology and residential services; a configuration of residential services for different space types, depending on the aspects of the cognitive function among the elderly; and finally a suggestion of a holographic system configuration and application depending on various scenarios.

• 전기전자학회논문지
• /
• 제24권4호
• /
• pp.1180-1183
• /
• 2020

최근 들어 IoT와 스마트홈의 발전에 따라 낙상 사고 감지, 화상 위험 감지와 같이 일상 생활에서의 안전 감지 기능이 많이 보급되기 시작했다. 이러한 안전 감지 기능은 대부분 인공지능에 의해 수행된다. 그러나 실험실 환경에서 안전 감지의 정확도만 평가하는 경우에는 실제로 일상 생활 환경에서 체감하게 되는 성능과 꽤 큰 차이를 보이는 경우가 많다. 본 논문에서는 이러한 문제점을 보완하기 위해 사용하는 두 가지 기법인 리빙랩과 혼동 매트리스를 소개한다. 리빙랩은 단순히 일상 생활환경의 모사를 넘어서 사용자가 직접 기술 개발 및 제품 설계에 참여할 수 있는 통로가 된다. 또한 혼동 매트리스에서 도출되는 다양한 성능 척도는 사용 목적에 적합하게 인공지능 시스템의 성능을 평가하는데 큰 도움을 준다.