• 한국IT서비스학회지
• /
• 제10권2호
• /
• pp.119-139
• /
• 2011

The concept of ubiquitous is being applied on diverse industry fields as a new growth engine in Korea. With constructing u-City, new services which are called 'ubiquitous services' are developed actively. Even though there are active movement to develop u-service, there is no clear definition of what service can be defined as ubiquitous service. Given that this study proposes a u-service value classification framework focusing on services' characteristics. We conducted experts' group interviews to analyze new operating or developing services whether it can be ubiquitous. Study results show that some services are hard to be defined as u-service, so this study offers possible improvement alternative. The u-service value classification which offers clear definition of u-service can be used for the practitioners offering measurement framework of u-service level.

• 토지주택연구
• /
• 제2권2호
• /
• pp.101-109
• /
• 2011

Recently, the construction of U-City or of U-City service (U-service) in many kinds of urban development projects becomes the general trend. However, as the construction of U-city comes into the spotlight like the trend of the times, various service constructions are being indiscreetly implemented since it's processed focusing on local specialized projects or local landmark project by a local autonomous entity or an institute in charge being off the original purpose of the improvement of living quality of residents and the efficiency of urban management, which causes a number of problems on the process, maintenance, operation and management of those projects. Therefore, this study is to derive the standard pattern of U-service construction through the analysis of patterns and numbers of U-service and problems during the process of construction in domestic U-City construction case district, and is aimed to suggest the reasonable direction of service construction based on this. 11 projects areas in which data related to U-service are available among U-City construction project areas were selected for the subjects of this study, and it's standardized with 228 detailed unit services that were suggested by U-Eco City R&D and with 11 service domains that are regulated in "the Act of ubiquitous city construction etc.", and it is limited to services that were suggested in U-City case area of which design was completed by July, 2010 based on this. The actual state of various U-service construction is analyzed through case studies as well as reviews on the legal and theoretical concept and the method of pattern classification of U-service, the plan for the standardization (pattern classification) of U-service and the plan for the construction body of service and to share the costs are suggested as the plan to construct reasonable U-service based on this for the method and the procedure of this study For the method to construct U-service, the plan to classify the pattern of U-service into the basic service and additional service is suggested, and whether it has the publicity, whether urban infrastructure is included, whether utilities are included, the body of realization, the recipients, the urgency, the importance and the spreading, etc. are suggested for the index to determine the pattern of service. The method to get the executor of a project to construct the basic service, the method to get the executor of a project to construct the most basic service among the group classification of service and to get a private entity and a local autonomous entity to perform additional service in the future, and the method to construct the whole service and to distribute the construction costs were suggested, and the first one that determines the body of construction after dividing U-service into the basic service and the additional service was evaluated to be the most reasonable one. And the plan to solve the problem that the excessive construction costs of U-service are shifted onto the executor of a project through benefit principle, balanced distribution principle and consultation and mediation between the interested parties was suggested for the criteria to share the costs.

• 대한공간정보학회지
• /
• 제17권4호
• /
• pp.81-86
• /
• 2009

본 연구는 u-City 구축사업의 지원 및 국가공간정보의 선도적 기술개발을 목표로 진행되고 있는 지능형국토정보기술혁신사업의 일부 내용으로, 새로운 도시환경인 u-City에서의 도시시설물관리 서비스모델 분류체계를 제시하고자 하였다. 먼저 기존 u-City 도시시설물 서비스모델 관련 연구사례를 조사 분석하였으며, 이를 토대로 u-City 시설물 관리에 적합한 분류체계로서 업무서비스(Action)에 의한 분류체계 및 시설물종류(Object)에 의한 분류체계를 제시하였다. 또한 분류체계안의 각 단위서비스의 정의 및 역할을 제시하였으며, 향후 구축될 u-City 도시시설물관리체계를 위한 적용방안을 도출하였다.

• 한국측량학회지
• /
• 제27권4호
• /
• pp.477-484
• /
• 2009

u-City 운영의 중심 역할을 담당하는 통합운영플랫폼은 유무선 통신망, 센서망을 연결하여 각종 센서 및 장치들을 수용하고, 다양한 정보를 통합적으로 수집 및 분석하며, 각종 인프라 요소들을 지능적으로 관제 운영한다. 본 연구에서는 u-City에서 통합운영플랫폼이 제공해야 할 서비스들을 공통응용 서비스, 운용관리 서비스 및 플랫폼 게이트웨이 서비스로 구분하고 각 서비스에 대한 세부 기능을 구성하고자 하였다. 이를 통해 구성된 세부 기능들은 상호간 정보 흐름 및 역할 정립을 통해 통합운영플랫폼의 서비스 기능을 명확히 할 것이며, 향후 서비스 기능 추가 및 수정에 따른 통합운영플랫폼의 기능 구성 참조 모델로 활용될 수 있을 것이다.

• 한국IT서비스학회지
• /
• 제11권1호
• /
• pp.325-340
• /
• 2012

KUbiquitous city(U-City) is a recent trend in urban planning and management across the globe. Currently, several typologies were developed and presented classifying U-City services, but validation research of these typologies are scarce. In this study, efforts were made to qualitatively validate the usability and practicality of a typology of u-city services. Using 228 U-City services identified in previous studies, classifying exercises were conducted against a typology. Three experts were involved in this expert heuristic exercise, against a most popularly used and comprehensive typology of U-City services. Findings indicates that the selected typology is high on comprehensive exhaustiveness, and empirical applicability while low on mutual exclusivity, simplicity and theoretical contribution. Implications for the typology improvement are suggested followed by limitations and directions for further research.

• 인터넷정보학회논문지
• /
• 제11권2호
• /
• pp.31-40
• /
• 2010

본 논문에서는 u-헬스케어 응용 서비스 지원을 위한 액티브 모델 기반의 서비스 컴포넌트를 제안한다. 서비스 컴포넌트는 헬스케어 응용 서비스의 개발을 지원하기 위해 기능을 세분화하여 구현하였다. 특히, 분산 객체그룹 프레임워크를 기반으로 다양한 헬스케어 홈서비스에 분산객체 기술을 이용하여 통합된 환경에서 적응형 정보 서비스를 제공하는데 중점을 두었다. 그리고 본 논문에서 제안한 서비스 컴포넌트를 헬스케어 홈 모니터링, 모바일 모니터링, 웹기반 모니터링과 같은 헬스케어 응용 서비스에 적용하여 수행 결과를 보인다. 또한 응답시간과 네트워크 부하와 시스템 부하에 대한 성능 평가 결과를 보였다.

• Journal of Biosystems Engineering
• /
• 제38권3호
• /
• pp.199-207
• /
• 2013

Purpose: Tomatoes, an important agricultural product in fresh-cut markets, are sometimes a source of foodborne illness, mainly Salmonella spp. Growth cracks on tomatoes can be a pathway for bacteria, so its detection prior to consumption is important for public health. In this study, multispectral Visible/Near-Infrared (NIR) reflectance imaging techniques were used to determine optimal wavebands for the classification of defect tomatoes. Methods: Hyperspectral reflectance images were collected from samples of naturally cracked tomatoes. To classify the resulting images, the selected wavelength bands were subjected to two-band permutations, and a supervised classification method was used. Results: The results showed that two optimal wavelengths, 713.8 nm and 718.6 nm, could be used to identify cracked spots on tomato surfaces with a correct classification rate of 91.1%. The result indicates that multispectral reflectance imaging with optimized wavebands from hyperspectral images is an effective technique for the classification of defective tomatoes. Conclusions: Although it can be susceptible to specular interference, the multispectral reflectance imaging is an appropriate method for commercial applications because it is faster and much less expensive than Near-Infrared or fluorescence imaging techniques.

• 한국재난정보학회 논문집
• /
• 제19권4호
• /
• pp.924-935
• /
• 2023

Purpose: The central aim of this study is to leverage machine learning techniques for the classification of Intrusion Detection System (IDS) data, with a specific focus on identifying the variables responsible for enhancing overall performance. Method: First, we classified 'R2L(Remote to Local)' and 'U2R (User to Root)' attacks in the NSL-KDD dataset, which are difficult to detect due to class imbalance, using seven machine learning models, including Logistic Regression (LR) and K-Nearest Neighbor (KNN). Next, we use the SHapley Additive exPlanation (SHAP) for two classification models that showed high performance, Random Forest (RF) and Light Gradient-Boosting Machine (LGBM), to check the importance of variables that affect classification for each model. Result: In the case of RF, the 'service' variable and in the case of LGBM, the 'dst_host_srv_count' variable were confirmed to be the most important variables. These pivotal variables serve as key factors capable of enhancing performance in the context of classification for each respective model. Conclusion: In conclusion, this paper successfully identifies the optimal models, RF and LGBM, for classifying 'R2L' and 'U2R' attacks, while elucidating the crucial variables associated with each selected model.

• 대한임베디드공학회논문지
• /
• 제5권3호
• /
• pp.144-151
• /
• 2010

Ubiquitous computing which is providing various convenient services to user will prevail in future. To realize ubiquitous service, analyzing technical and information factors for service implementation is necessary. This paper defines ubiquitous service model to satisfy user demands and we analyze technical and information factors in order to realize services. Based on the factors, we extracts and classifies common compositions of ubiquitous services to suggest guidelines of service design.

• 대한교통학회지
• /
• 제28권3호
• /
• pp.7-17
• /
• 2010

그 동안 친환경 교통수단인 자전거의 수단분담율을 향상시키고자 하는 노력이 있었으나 다른 수단들과의 경쟁력 약화로 인하여 그 효과가 부진한 측면이 있었다. 따라서, 발달된 정보통신기술(ICTs)과 자전거를 결합하여 친환경적이면서 편리함을 동시에 갖춘 새로운 개념의 서비스를 정립함으로써 여러 가지 불편과 위험 요인을 극복할 필요가 있다. 본 연구는 환경과 ICTs가 결합된 소위 u-City에서 제공되는 서비스의 일환으로서의 u-Bike 서비스의 개념을 정립하고 이들의 적용 우선순위를 평가 및 도출하는데 목적이 있다. 본 연구에서는 u-Bike 서비스를 12개로 설정하고 이를 개념화하였으며, 계층분석기법(AHP) 등을 활용하여 서비스개발 및 적용의 우선순위를 평가하였다. 그 결과, 자전거와 대중교통연계 서비스(bike and ride service)가 최우선적으로 적용 가능한 서비스로 나타났으며, 다음으로 방치 및 도난예방서비스, 공공자전거시스템, 주차관리서비스, 그리고 자전거등록관리서비스의 순으로 적용 우선순위가 높은 것으로 나타났다.