• 한국ITS학회 논문지
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• 제11권6호
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• pp.1-14
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• 2012

개별차량의 주행궤적을 모니터링하고 개별차량의 위험운전행태를 검지하여 도로의 안전성을 평가하고 분석하는 것은 사고의 원인 분석 및 예방의 시작이라 할 수 있다. 최근 각종 센서 및 통신기술의 발달은 과거에 비해 보다 미시적이고 폭넓은 교통자료의 취득을 가능하도록 하였다. 이러한 발달된 기술력을 통해 사고 이력자료를 이용할 수밖에 없던 과거와 달리 개별차량의 주행궤적자료를 실시간으로 가공하여 교통상황과 정보를 바로 수집할 수 있는 실시간 모니터링 시스템 환경을 제공할 수 있다. 본 연구에서는 개별차량 주행자료 수집 및 차량-차량간, 차량-인프라간 무선통신이 가능한 차량 내 센서로부터 수집되는 자료를 이용하여 위험운전이벤트를 검지하였다. V2X 통신을 통해 생성된 위험운전 정보를 교통관리센터로 전달하고 도로의 위험도를 산출함으로써 실시간 유비쿼터스 환경에서의 교통안전 모니터링을 통해 도로의 안전성을 평가할 수 있는 기법을 제시하였다. 본 연구에서 제시한 교통안전 모니터링 기법은 실제 테스트베드에 구현되어 테스트 중에 있으며, 실제 구현된 교통안전 모니터링의 적용 사례 및 활용방안에 대하여 소개하고자 한다. 본 연구에서 제시한 교통안전 모니터링 기법은 도로의 전반적인 안전성을 검토함으로써 교통류 관리전략 수립을 위한 기초자료로써 활용될 수 있을 것이며 교통안전증진을 위한 다양한 정책개발 및 평가에 활용할 수 있을 것으로 기대된다.

• 가정∙방문간호학회지
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• 제12권1권
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• pp.41-69
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• 2005

Purpose: This study was performed to evaluate the outcomes of the home care nursing program conducted jointly by thirty two catholic churches and C hospital in Seoul. Method: The subjects included 173 patients who registered for the program during a 4 month-period from November 1, 2004 to February 28, 2005 and received home care services for more than 4 times and 32 professional nurses participating in the program. Using the concept of medical outcome study (MOS), the structure, process, outcome elements were analyzed. Result: 1) A Catholic homecare nursing center and nurses of the C hospital played a central role in providing nursing care, and each church operated its own vehicle from its own office. Home care nurse's job satisfaction was 2.8 out of total score of 4. The major illness was cerebrovascular disease including stroke followed by skeletomuscular disease including degenerative arthritis cancer, and diabetes. Among reasons for accessing the home care nursing program, hypertension management was most prevalent. More than half of the registration was done through catholic churches. Most people who referred the patient to the program was through the church. Most patients received home care nursing 1-2 times a week for 30 to 60 minutes in average and the most frequent type of service provided was basic nursing. 3) The most frequent reason for terminating home care services was death. The change in PPS(Palliative Performance Scale) level from the time of registration and after 4 visits was the same in 45%, decreased in 30%, and improved in 25%. Patient satisfaction was very high, showing 3.4 out of total score of 4. Conclusion: These results proved that the home care nursing program was highly appreciated by subjects and nurses were providing professional care. Thus the two parties involved in the program were actively supporting the program to fulfill their mission. However, several areas needed to be improved such as relating with local community, relating with family doctor, and issue of improving the working conditions for home care nurses.

• 한국측량학회지
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• 제34권2호
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• pp.207-215
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• 2016

The demand for spatial data service technologies is increasing lately with the development of realistic 3D spatial information services and ICT (Information and Communication Technology). Research is being conducted on the real-time provision of spatial data services through a variety of mobile and Web-based contents. Big data or cloud computing can be presented as alternatives to the construction of spatial data for the effective use of large volumes of data. In this paper, the process of building HLM (Hyper Live Map) using multi-source data to acquire stereo CCTV and other various data is presented and a big data service architecture design is proposed for the use of flexible and scalable cloud computing to handle big data created by users through such media as social network services and black boxes. The provision of spatial data services in real time using big data and cloud computing will enable us to implement navigation systems, vehicle augmented reality, real-time 3D spatial information, and single picture based positioning above the single GPS level using low-cost image-based position recognition technology in the future. Furthermore, Big Data and Cloud Computing are also used for data collection and provision in U-City and Smart-City environment as well, and the big data service architecture will provide users with information in real time.

• ETRI Journal
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• 제42권5호
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• pp.643-657
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• 2020

Sixth generation will exploit satellite, aerial, and terrestrial platforms jointly to improve radio access capability and unlock the support of on-demand edge cloud services in three-dimensional (3D) space, by incorporating mobile edge computing (MEC) functionalities on aerial platforms and low-orbit satellites. This will extend the MEC support to devices and network elements in the sky and forge a space-borne MEC, enabling intelligent, personalized, and distributed on-demand services. End users will experience the impression of being surrounded by a distributed computer, fulfilling their requests with apparently zero latency. In this paper, we consider an architecture that provides communication, computation, and caching (C3) services on demand, anytime, and everywhere in 3D space, integrating conventional ground (terrestrial) base stations and flying (non-terrestrial) nodes. Given the complexity of the overall network, the C3 resources and management of aerial devices need to be jointly orchestrated via artificial intelligence-based algorithms, exploiting virtualized network functions dynamically deployed in a distributed manner across terrestrial and non-terrestrial nodes.

• 한국컴퓨터정보학회논문지
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• 제18권8호
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• pp.33-41
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• 2013

최근 지능형자동차 기술은 IT와 융합되어 새로운 첨단 영상미디어 응용기술로 발전하며, 오픈소스 기반의 안드로이드를 탑제한 스마트폰 응용기술과 지능형자동차 개발이라는 새로운 패러다임으로 많은 연구개발이 이루어지고 있다. 안드로이드 기반의 지능형자동차 응용 기술은 이동수단의 한계를 넘어 다양한 멀티미디어 중심의 집합기술로 진화하고 있으며, 이러한 분산 환경에서 개발되어 있는 각각의 멀티미디어 플랫폼서비스와 애플리케이션이 개발되고 있음에 따라 다양한 서비스 기술을 통한 휴대 단말장치기술이 절대적으로 요구되고 있다. 본 논문에서는 안드로이드 기반의 지능형 자동차 전용 미들웨어 설계를 통하여 단일형 시스템 스펙에 맞춰 SVC Codec과 실시간 동영상, 그래픽처리등 지능형자동차 미들웨어 SoC 설계를 통해 응용 연구를 실험 하였으며, 오픈플랫폼에서 제공되는 각종 단말서비스 기능들을 SoC 기반으로 새롭게 설계하고 표준화된 인터페이스 분석기법을 본 연구에서 실험을 통하여 입증하였다.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2016년도 전력전자학술대회 논문집
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• pp.345-346
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• 2016

The grid-connected energy storage systems, which could increase the reliability, efficiency, and cleanliness of the grid is presently restricted by the high cost of batteries. This problems could be solved by batteries retired from automotive services. These batteries can provide a low-cost system for energy storage and other applications such as residential applications and renewable energy integration. This paper gives an overview of technical requirements for the re-use of the electric vehicle batteries in energy storage systems.Firstly, the motivation of research is introduced. Secondly, the technologies needed for the re-use of the battery are introduced such asidentification of the battery characteristics, grading of the aged batteries, identification of the state-of-charge and state-of-health of the battery and suitable power electronic converter topologies. In addition the control strategy to maximize the battery lifespan and bypass the faulty batteries is presented and one-stop solution to implement the above mentioned technologies are also given.

• 한국포장학회지
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• 제21권2호
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• pp.61-65
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• 2015

Agricultural products packaged for transportation are put in the various dangerous environments owing to the damage factors like vibration, shock, compression, climate etc. under the distribution process. On fruits packaging for transportation, especially, the shock and vibration is considered as the most important damage factors. A major cause of shock damage to fruits is drops during manual handling. Especially, the damages of fruits during the parcel delivery service are very serious. The parcel delivery services of fruits are increasing and contribute to increasing of farm house earning. Also, the freight vehicle is mostly used to transport the fruits. Shock and impact generated by the freight vehicle may give serious damage to fruits. The optimum packaging design of parcel delivery service of fruits during transportation is required to reduce the fruits damages. In order to design the packaging system for parcel delivery service of fruits considering the transportation environment, the comprehension of characteristics for vibration and shock generated by manual handling and acting on transportation vehicles under various road conditions and loading methods is required. This research was performed to analyze the shock characteristics, acceleration level and power spectral density (PSD) during the parcel delivery service of fruits. The overall level of recommended PSD profile in a specific transportation of parcel delivery service for fruits was $0.63G_{rms}$.

• 한국항행학회논문지
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• 제10권1호
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• pp.7-12
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• 2006

본 논문에서는 지능형 교통망 시스템 서비스에 사용될 5.8GHz 대역에서 OFDM을 이용한 단거리 전용 통신 시스템의 성능 평가 및 분석하였다. DSRC 채널은 차량의 이동 속도가 최대 180km/h 로 빠른 속도를 가지며, 이로 인하여 핸드 오프가 발생하지 않을 경우, 다양한 정보를 제공하기에는 서비스 시간이 매우 짧다. 따라서, 교통정보와 다양한 멀티미디어 서비스 등을 하기 위해서 더 높은 전송속도가 요구되며, 현재 차세대 DSRC 시스템의 데이터 전송 속도는 10Mbps 이상으로 추진되고 있다. 본 논문에서는 라이시안 채널에서의 수신 신호를 컴퓨터 시뮬레이터를 이용하여 실험하였고, BCH 부호화 기법을 적용하여 시스템의 성능을 분석하였다.

• 대한임베디드공학회논문지
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• 제4권4호
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• pp.164-173
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• 2009

Automotive systems have tended to be equipped with many electronic contents to satisfy safety, comport, convenience, and entertainment services over the past years. As a result, the amount of vehicle embedded software in electrical/electronic(E/E) systems is steadily increasing to manage these requirements. This leads to the traditional, document-based software development in the vehicle embedded systems being increasingly displaced by a model-based development in order to reduce software development time and cost. Due to the application of model-based development, a great evolution is being realized in the aspect of efficiency, but the development is being made without sufficient testing. So, erroneous automotive embedded software may cause serious problems such as car accidents which relate to human safety. Therefore, efficient methods for model-based test and validation are needed to improve software reliability in the stage of embedded software development. This paper presents the model-based development and test method for AUTOSAR embedded software to improve its reliability and safety, and it is demonstrated based on the case study.

• 품질경영학회지
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• 제41권2호
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• pp.301-322
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• 2013

Purpose: This study aims to determine the needs of customers who use railroads as a mode of transportation and propose customer-oriented improvements in railroad technology by making connections between customer needs and railroad technology. Methods: We primarily used two methods for this study, AHP and QFD. First, AHP was used to evaluate the relative importance among the different components of railroad technology. Second, the QFD was applied to make a link between customer needs and railroad technology. Results: Railroad technology is largely divided into development, maintenance, and support. Empirical results showed the following improvement priorities in development, vehicle, system, line, signal/communication, power, and structure, in maintenance, vehicle, signal/communication, line, process, power, and structure, and in support, safety/precaution, management, environmental energy, operations/logistics, and station. Conclusion: Recognizing limitations in measuring the level of railroad technology when using the existing 'Technology Growth Model,' we used AHP and QFD to explore improvement directions for customer-oriented railroad technology. By offering customer-oriented services based on this study, railroad service providers will be able to acquire competitive advantage in the market.