• 한국IT서비스학회:학술대회논문집
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• 2009.11a
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• pp.434-438
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• 2009

현대사회에서는 도시민의 삶의 질 향상과 관련하여 어메니티의 중요성이 크게 부각되고 있다. 특히 도시의 위생 및 안전과 관련된 환경, 방범 방재, 교통, 치안 등 공공부문의 경우 효율성과 안정성이 담보되어야 한다. 그러나 기존 도시들의 경우 각 부문의 운영이 독립적으로 이루어짐에 따라 도시 운영상의 비효율적 요소들이 나타나고 있다. 이러한 문제점은 최근 활발히 논의되고 있는 U-City 구성요소 중 도시통합운영센터의 체계적인 관리 및 운영을 통해 해결될 수 있을 것이다. 이러한 도시통합운영센터를 위해서는 도시전체를 통합운영, 관리하는 운영방안을 통해 도시의 분산 운영 및 관리에 따른 경제적 손실을 최소화하고, 각 유관기관의 운영체계를 유기적으로 운영할 수 있어야 한다. 또한 도시통합 운영업무에 있어 이해관계를 갖는 유관기관, 조직, 부서 등을 도출하고 각각의 역할과 업무에 대한 분석이 필요하다. 그러나 도시통합운영센터는 도시별 조건이 상이하여 기본적인 공공 분야에서는 기능적인 공통점을 가지고 있지만, 운영기관이 다르고 분야 및 책임, 이해관계로 인해 통합모델로서의 제시가 쉽지 않은 상황이다. 이에 이 연구에서는 기존 도시통합운영센터 및 유사기능수행조직의 운영 사례를 분석하고 이를 중심으로 도시통합운영센터 운영조직의 구성과 기능에 대해 살펴보고자 한다. 기존 도시통합운영센터 운영 사례분석에서는 현재 운영되고 있는 U-City 도시통합운영센터를 대상으로 현황 파악 및 문제점을 도출하고, 유사기능수행조직의 운영지침 또는 운영사례 분석을 바탕으로 도시통합운영센터 운영방안을 위한 운영조직의 구성과 기능을 제시한다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.39B no.9
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• pp.578-589
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• 2014

In this paper, we introduce the concept of cyber-physical intersection systems (CPIS) which interconnects roadside units (RSU) located at the intersection, on-board units (OBU) of moving vehicles, and the smartphone apps, named the Smartphone Agent (SA). At the pedestrian mode of the SA, the connectivity management schemes, such as a location update and a handover control algorithm, are proposed to better support the CPIS services while minimizing the power consumption of the pedestrian's smartphone. We develop a real prototype of the CPIS, including RSU, OBU, and the SA. Based on the numerical results collected from a pedestrian moving around the Pusan National University campus, we validate that the proposed connectivity management schemes can improve not only the power efficiency of the pedestrian's smartphone, but also the quality of the CPIS services.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• v.9 no.2
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• pp.177-180
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• 2005

AIS needs high efficiency and safety in terms of operational management and, in the aspect of service range, it is time to minimize shadow regions through propagation evaluation of AIS transmitter. Thus this study analyzes shadow regions and the scope of propagation of waves from stations through the electric wave environment of AIS. First, this study examines the characteristics of AIS wave and draws up methods to analyze the scope of propagation of waves according to the characteristics. Second, this study finds out service regions and shadow regions of the 22 stations across the nation by analyzing the actual data based on climate and topography, Lastly, this study summarizes the results of wave conductivity evaluation and conductivity problems and proposes improvement measures.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.32 no.2
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• pp.5-24
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• 2021

This study intended to look at the Library Living Lab to solve community problems. To this end, this study investigated cases outside of the country and investigated various aspects of Living Lab's application to solving community problems. In addition, a survey was conducted on residents of Chungju to find areas where libraries can contribute to solving problems in the community and investigate the need. As a result, residents generally responded that "Library Living Lab," in which libraries participate in living lab activities in various fields, is needed to solve problems in the community. It shows that the range of services and activities that the library can provide can be expanded to the community and can be an innovative measure for library services that can solve almost all problems in the community through the Library Living Lab.

• Journal of Advanced Navigation Technology
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• v.26 no.2
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• pp.91-98
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• 2022

Unmanned aircraft system traffic management (UTM) service for the safe operation of unmanned aerial vehicles (UAV) such as drones using commercial communication networks such as long-term evolution (LTE) and 5G in low-altitude areas of 150m or less is being studied in several countries. In this paper, whether it is possible to secure three-dimensional (3D) coverage for UTM service using the existing LTE cellular network for terrestrial usersis analyzed through simulations. The practicality in the real environment is confirmed by performing performance analysis in the actual topographical environment and the LTE base station layouts in Korea. According to the analysis results, as the altitude increases, the number of line-of-sight (LOS) interference base stations increases, resulting in a worse signal to interference plus noise ratio (SINR), but coverage is secured except for the limited areas within 150m. was confirmed to be possible. In addition, it is confirmed that a significant proportion of outage areas could be reduced by placing a small number of additional base stations for the outage area.

• Journal of the Korea Safety Management & Science
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• v.18 no.1
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• pp.99-109
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• 2016

The types and characteristics of services that airport service systems provide have recently been diversified and specialized to meet various needs of users and their travelling activities. A service for the mobility handicapped is one of the newly demanded services. However, current services for them, which are provided by most of the Korean airports, are not sufficient to satisfy their needs. Additionally, there exist a lot of constraints in the use of those services, which makes it difficult for the mobility handicapped to use them effectively. Another problem is that a lot of the mobility handicapped do not even know that airports now offer services specialized for them. Considering that Korean airports have been recognized as a top-level service provider for about decades, it can be claimed that such an inferior quality of services for the mobility handicapped should be urgently improved. With this issue in mind, this study aims to propose an approach to improving the quality of airport services for the mobility handicapped. Firstly, we examined the actual conditions of the services for the mobility handicapped and identified the limitations of the current services, based on the results of literature review and questionnaire survey against the mobility handicapped and stakeholders of the services currently provided. Then we established a set of design improvement requirements and suggested several ways to improve the services for the mobility handicapped. Finally, we pointed out several issues to be resolved to design better specialized services for the mobility handicapped.

• Journal of Advanced Navigation Technology
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• v.22 no.3
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• pp.213-219
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• 2018

In this paper, we propose a design method and process for hardware and software of hybrid V2X communication module that supports both C-ITS communication protocol designed for vehicle environment and Legacy LTE communication technology. C-ITS is suitable for safety service applications due to its low latency characteristics, and Legacy LTE is a technology suitable for non-safety applications such as traffic information and infotainment due to high latency and high capacity. The hybrid V2X communication module supports multiple communication technologies of WAVE and LTE, in which WAVE supports multiple channels, so that it is designed to transmit road information such as LDM and positioning correction information to an autonomous vehicle in real time. The main design results presented in this paper will be applied to the implementation of future hybrid V2X communication terminals for vehicles.

• Journal of Internet Computing and Services
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• v.24 no.5
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• pp.107-120
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• 2023

The public bicycle of Seoul, Ttareungyi, was launched at October 2015 to reduce traffic and carbon emissions in downtown Seoul and now, 2023 Oct, the cumulative number of user is upto 4 million and the number of bike is about 43,000 with about 2700 stations. However, super growth of Ttareungyi has caused the several problems, especially demand/supply mismatch, and thus the Seoul citizen has been complained about out of stock. In this point, this study conducted a real time demand forecasting model to prevent stock out bike at stations. To develop the model, the research team gathered the rental·return transaction data of 20,000 bikes in whole 1600 stations for 2019 year and then analyzed bike usage, user behavior, bike stations, and so on. The forecasting model using machine learning is developed to predict the amount of rental/return on each bike station every hour through daily learning with the recent 90 days data with the weather information. The model is validated with MAE and RMSE of bike stations, and tested as a prototype service on the Seoul Bike Management System(Mobile App) for the relocation team of Seoul City.

• Proceedings of KOSOMES biannual meeting
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• 2004.05b
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• pp.43-48
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• 2004

The development of the traffic system has brought relative reduction in aspect of the cost and time distance on the geographical space. SOC(social overhead capital), an express highway and railroad, has a great and absolute effect on the prosperity of community, As Mokpo is one of the community under the influence q West costal highway express and KTX(Korea Train Express), the number of the tourists visiting city of port like Mokpo has increasing gradually, especially at the high-demand season(in Summer). But the coastal passenger boot can't be capable of customers arriving at the port. As a result of this situation, the 'balking' occurs. No 'balking', means the jam of road. In this thesis, by understanding the concept and property of ARENA and simulating operation of coastal passenger boot at Mokpo port, intends to analyze the truth of 'balking' and finds an effective operation method of coastal passenger boot for the solution to the traffic jam. The solution to the jam in the vicinity of port of Mokpo, which try to develop tourism package commodity now, will present the effect of qualitative analysis in giving an opportunity of economic growth of the community, Mokpo.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.38 no.1
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• pp.57-67
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• 2020

Recently, smart cities are attracting attention as a solution for a plethora of urban problems, including transportation, environment, safety, and energy. However, despite a substantial body of research dealt with the concept, trends, policy, and legal institutions of smart cities, few researchers have examined how the smart city services influence the cities from the dynamic perspective that considers the entire cycle of a city, including its growth, stagnation, and decline. Thus, it is vital to understand how the city changes with time from the view that a city is a system of sub-elements-population, industry, transportation, environment, housing, and land-closely interacting together. Within this context, this study explores how the urban dynamics of Anyang-city develop for the long term using the System Dynamics method and analyzes the effect of smart city project investment on the dynamics of Anyang-city. According to the result, Anyang-city is a "mature and stable" type, and its population is expected to decrease slowly by 2040. Specifically, the Anyang-city population will be reduced to 553,000 by 2030. It was analyzed that the number will decrease to 543,000 by 2040. It was also found that the investment in smart city projects in Anyang, based on the Plan for Anyang Smart City, would have the following effects: easing population decline, increasing number of businesses, improving urban safety index, and increasing average driving speed. The population will grow by 4,000 and the number of businesses will increase by 761 than before budget investment. The result of this paper is expected to contribute to identifying and predicting the effect of smart city policies from a long-term perspective.