• Proceedings of the Korea Information Processing Society Conference
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• 2015.04a
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• pp.806-809
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• 2015

급성심근경색증은 우리나라의 3 대 응급질환으로 골든타임 내의 빠른 진단과 처치가 필요하다. 보통 급성심근경색은 질환의 특성상 관상동맥의 상태를 파악하는 것이 중요하기 때문에, 진단을 위한 지표로서 의료 영상이 활용되고 있으며 빠른 진단을 위해서는 효과적인 영상 정보 제공이 요구되는 상황이다. 하지만 기존 시스템은 영상의 형식적인 메타데이터에 의해 식별되어 중요 의료정보를 결여된 평면적인 정보 제공이 이루어지고 있다. 그러나 영상에 내재된 의미적 특징을 기반으로 한 정보 제공이 가능해진다면, 효과적인 영상 정보의 확인이 가능해진다. 따라서 본 논문에서는 급성심근경색의 신속하고 효과적인 진단을 위해, 관련 영상으로부터 의학적으로 가치있는 의료정보들의 의미적 정보를 추출함으로써 개별적인 영상에 분산되어 있던 의료 정보들을 통합하며, 직관적이고 효과적으로 의료 영상정보에 대한 파악을 가능케 한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2001.04a
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• pp.35-38
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• 2001

본 논문에서는 이동 컴퓨팅 환경에서 발생하는 실시간 이동 트랜잭션을 효율적으로 처리하기 위한 트랜잭션 관리자를 제안한다. 제안된 트랜잭션 관리자는 기존의 종료시한만 고려하던 방법과는 달리 이동 호스트 때문에 발생하는 실시간 데이터의 유효성도 함께 고려하여 트랜잭션의 실행여부를 판단한다. 그 후, 트랜잭션의 중요도와 종료시한을 고려한 우선순위 큐에 최적의 실행 윈도우를 생성하여 스케줄링하고, 실행될 트랜잭션을 선택할 때는 이동 호스트와의 접속 단절을 고려한다. 따라서, 제안된 기법은 실시간 데이터의 유효성 제약조건 위반에 따른 트랜잭션의 철회 후 재시작을 감소시키며, 종료시한을 만족시키는 실시간 이동 트랜잭션의 중요도의 합을 최대로 하는 장점을 가진다. 이 기법은 이동 통신, 응급 재난 구조 시스템 등에서 발생하는 실시간 이동 트랜잭션의 관리자로 적합하다.

• Journal of Auto-vehicle Safety Association
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• v.12 no.4
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• pp.61-69
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• 2020

As a sales volume of autonomous vehicle continually grows up, regulations on this new technology are being introduced around the world. For example, safety standards for the Level 3 automated driving system was promulgated in December 2019 by the Ministry of Land, Infrastructure and Transport of Korean government. In order to promote the development of autonomous vehicle technology and ensure its safety simultaneously, the regulations on the automated driving systems should be phased in to keep pace with technology progress and market expansion. However, according to SAE J3016, which is well known to classify the level of the autonomous vehicle technologies, the description for classification is rather abstract. Therefore it is necessary to describe the automated driving system in more detail in terms of the 'Level.' In this study, the functions and characteristics of automated driving system are carefully classified at each level based on the commentary in the Informal Working Group (IWG) of the UN WP29. In particular, regarding the Level 4, technical issues are characterized with respect to vehicle tasks, driver tasks, system performance and regulations. The important features of the autonomous vehicles to meet Level 4 are explored on the viewpoints of driver replacement, emergency response and connected driving performance.

• The Journal of the Convergence on Culture Technology
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• v.9 no.1
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• pp.613-618
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• 2023

In this paper, a monitoring program that can automatically determine whether a patient admitted to an isolation room acts out of a stable state through a screen photographed in real time is described. The motion recognition model of this program was built by learning through transfer learning. 900 images were used for the three movements, and this program was developed for the web to support all environments. The model was determined with high accuracy to determine the state of the subject hospitalized in the isolation room, and can be applied by applying it to the existing isolation room monitoring system.

• Proceedings of the Korean Society of Computer Information Conference
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• 2023.01a
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• pp.273-274
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• 2023

최근 고령화 사회로 인해 노년층의 인구 비율이 증가하고, 각종 질병 및 조기사망 등 많은 위험에 노출되고 있다. 이러한 위험을 최소화하기 위해 다양한 의료 기기들이 발전해나가고 있다. 그 중 일반 사람들이 접하기 쉬운 기기가 바로 AED(자동제세동기)이다. 현재 상용화되어 있는 AED는 의학 지식이 부족한 일반인에게 음성 및 화면을 통해 가이드를 해주고, 부착 패드에 전기를 가하여 심장에 전기충격을 줄 수 있게 만들어져 있다. 본 논문에서 AED 기능을 고도화하여 환자의 상태를 확인하고 환자의 위치와 바이탈 체크 정보를 수집하여 웹 서버로 전송하는 기능을 구현하였다. 서버에 전달된 정보는 출동하는 구급대원에서 전달되어 보다 빠른 조치가 가능한 응급시스템에 이용된다. 본 논문의 결과는 환자의 상태나 위치를 손쉽게 확인하고 관리함으로써 비상 상황 시 대처를 신속하게 할 수 있으며 기존 AED보다 경제제적 부담을 줄이는 기대 효과를 가질 수 있다.

• The Journal of the Korea institute of electronic communication sciences
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• v.8 no.3
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• pp.487-498
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• 2013

A variety of location-based services applications, such as missing children search, emergency rescue requests and so on that requiring high-precision location information are increasing. Precision of GPS that can be used in most systems, however, is still low. In this paper, we design and propose a low cost differential global positioning system(DGPS) based on Web services using object-oriented modeling technique which can offer useable location service, variety device and safe service in wireless environment. The proposed system is designed with UML based on object-oriented modeling to maximize system recyclability and system scalability. In addition, we would like to improve the precision of the GPS in accordance with mobile station location when build low cost mobile station, location differential framework and server. We implement a communication interface based on web-service which is available in the form of a variety of services and can offer stable according to mobile environments. Finally, as performance evaluation results, we can obtain precision location within 1 ~ 2m through proposed system and 88.5% probability of less than 2m.

• Journal of Intelligence and Information Systems
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• v.22 no.1
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• pp.107-118
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• 2016

The advent of 5G mobile communications, which is expected in 2020, will provide many services such as Internet of Things (IoT) and vehicle-to-infra/vehicle/nomadic (V2X) communication. There are many requirements to realizing these services: reduced latency, high data rate and reliability, and real-time service. In particular, a high level of reliability and delay sensitivity with an increased data rate are very important for M2M, IoT, and Factory 4.0. Around the world, 5G standardization organizations have considered these services and grouped them to finally derive the technical requirements and service scenarios. The first scenario is broadcast services that use a high data rate for multiple cases of sporting events or emergencies. The second scenario is as support for e-Health, car reliability, etc.; the third scenario is related to VR games with delay sensitivity and real-time techniques. Recently, these groups have been forming agreements on the requirements for such scenarios and the target level. Various techniques are being studied to satisfy such requirements and are being discussed in the context of software-defined networking (SDN) as the next-generation network architecture. SDN is being used to standardize ONF and basically refers to a structure that separates signals for the control plane from the packets for the data plane. One of the best examples for low latency and high reliability is an intelligent traffic system (ITS) using V2X. Because a car passes a small cell of the 5G network very rapidly, the messages to be delivered in the event of an emergency have to be transported in a very short time. This is a typical example requiring high delay sensitivity. 5G has to support a high reliability and delay sensitivity requirements for V2X in the field of traffic control. For these reasons, V2X is a major application of critical delay. V2X (vehicle-to-infra/vehicle/nomadic) represents all types of communication methods applicable to road and vehicles. It refers to a connected or networked vehicle. V2X can be divided into three kinds of communications. First is the communication between a vehicle and infrastructure (vehicle-to-infrastructure; V2I). Second is the communication between a vehicle and another vehicle (vehicle-to-vehicle; V2V). Third is the communication between a vehicle and mobile equipment (vehicle-to-nomadic devices; V2N). This will be added in the future in various fields. Because the SDN structure is under consideration as the next-generation network architecture, the SDN architecture is significant. However, the centralized architecture of SDN can be considered as an unfavorable structure for delay-sensitive services because a centralized architecture is needed to communicate with many nodes and provide processing power. Therefore, in the case of emergency V2X communications, delay-related control functions require a tree supporting structure. For such a scenario, the architecture of the network processing the vehicle information is a major variable affecting delay. Because it is difficult to meet the desired level of delay sensitivity with a typical fully centralized SDN structure, research on the optimal size of an SDN for processing information is needed. This study examined the SDN architecture considering the V2X emergency delay requirements of a 5G network in the worst-case scenario and performed a system-level simulation on the speed of the car, radius, and cell tier to derive a range of cells for information transfer in SDN network. In the simulation, because 5G provides a sufficiently high data rate, the information for neighboring vehicle support to the car was assumed to be without errors. Furthermore, the 5G small cell was assumed to have a cell radius of 50-100 m, and the maximum speed of the vehicle was considered to be 30-200 km/h in order to examine the network architecture to minimize the delay.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.10 no.8
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• pp.1519-1525
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• 2006

This paper proposes the U-healtcare middleware that is based on mininumCORBA. Ubiquitous healthcare system is generated by combining the technologies of computer system and medical system. This makes available that the person can receive medical treatment anywhere, anytime at on-line. The Healthcare devices are connected to network system as wire or wireless internet. So, the computer system can gather the vital information from the person at the real time and transfers the information to the server system that processes the medical information. When a medical doctor makes a diagnosis they can get more information about the patient by using the information within the server. Users would like to receive more services in the ubiquitous healthcare system than the traditional medical system. And in U-healthcare system, every healthcare devices and the users have to be connected to network system and the information from them has to be integrated. U-Home Healthcare middleware I proposed in this paper will do everything that I mentioned above.

• The Journal of the Korea Contents Association
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• v.8 no.5
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• pp.224-236
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• 2008

To enhance the quality of disaster management service, the paradigm shift is necessary from the supplier-centered approach to demander-centered approach. In this paper, demander means all the policy actors that participate in the field of disaster such as central & local governments, emergency rescue systems, civil volunteer groups as well as the disaster victims. In this study, we analyze the current problems of disaster management service in demanders' point of view through in-depth interviews and then address suggestions based on each entity's recognitions and understandings related. The results are as follows: 1) Lack of systemicity in the current disaster management service. 2) The mutual distrust and understanding among the policy actors participating in the disaster site. 3) In the field of disaster, not only the disaster victims but also people related to entities are deprived of a stable living due to a long period of rescue activities. Furthermore, the conflicts derived from allocations of the aid fund can bring about the collapse of local community involved in disaster. 4) The life of the disaster victims that have been damaged mentally and financially is earnestly necessary to be conveniently served by disaster management service.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.40 no.5
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• pp.851-856
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• 2015

As crime has actually increased in recent years, various mobile applications related to safety and emergency measure have received much attention. Therefore, IoT (Internet of Things) technologies, which connect various physical objects with Internet communication, have been also paid attention and then diverse safety services based on IoT technologies have been on the increase. However, existing mobile safety applications are simply based on location based service (LBS). Also, as they are independently operated without the help of another safety systems, they cannot efficiently cope with various safety situations. So, this paper proposes the efficient smart safety service architecture with both the risky situation detection using user location as well as various sensing information and the risk congruence measure using the streetlight infrastructure. Additionally, UDID (unique device identifier) is utilized for the secure communication with the control center.