• 한국ITS학회 논문지
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• 제9권2호
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• pp.12-22
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• 2010

가변전광표지판(VMS)은 도로이용자에게 도로, 기상 및 교통의 상황이나 그에 따른 교통규제의 상황에 관해 필요한 정보를 실시간으로 제공함으로써 교통흐름을 원활하게 하고 안전한 통행을 하도록 하는 시설이다. 또한 VMS는 운전자에게 정보를 제공하여 운전자들에게 전방의 교통상황 및 소요시간을 미리 알 수 있게 함으로써 불안감 해소와 심리적인 안정감을 주게 된다. 하지만 VMS는 비시장재이며 공공재라는 성격이 강하여 가치를 제대로 평가받지 못하였다. 본 연구에서 조건부가치평가법(CVM)을 이용하여 VMS의 교통정보 이용자만족도에 대한 가치를 평가하였다. 지능형교통시스템(ITS)이 구축된 도시를 대상으로 도시부도로와 도시고속도 구분하여 인터넷 설문조사를 실시하였으며, 그 결과 이용자 만족도 가치모형 추정에 제시금액, 이용빈도, 만족도, 성별, 연령 5가지 변수가 유의한 변수로 분석되었다. 유의한 변수로 추정한 모형으로 이용자만족도 가치를 평가한 결과 도시고속도로는 96.7원/대, 도시부 도로는 76.3원/대의 가치가 있는 것으로 나타났다. 또한 통행목적별로 가치를 산정한 결과 모든 노선에서 출퇴근, 업무, 여가 순으로 가치가 높은 것으로 나타났다.

• 한국ITS학회 논문지
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• 제17권1호
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• pp.31-41
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• 2018

본 연구에서는 세종시의 생활권역을 대상으로 Social Force Model을 활용하여 재난상황에서의 정보제공 시나리오에 따른 보행자 대피행태와 정보제공효과를 추정하였다. 분석을 위한 재난상황은 지진 등의 긴급재난의 발생으로 인하여 보행자가 보도를 통해 신속히 대피해야 하는 상황을 가정하였다. 대상지역 네트워크의 최적화를 위해 최소 평균통행시간을 기준으로 각 존에 대한 최적 대피소를 선정하였으며 이를 바탕으로 정보제공 수준에 따른 대피 시나리오분석을 수행하였다. 분석결과, 보행자간의 상충으로 인한 평균 통행시간 및 지체시간이 증가하는 현상도 나타났으나 재해발생에 따른 대피유도정보를 제공할 경우 대피완료시간이 감소하는 등 대피의 효과가 입증되었다. 본 연구는 향후 도시지역의 보행자를 위한 재난방지 계획 등의 기초 연구로 활용될 것으로 기대된다.

• 국제초고층학회논문집
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• 제10권3호
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• pp.203-210
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• 2021

With the development of urbanization, the increasing of buildings density in urban core areas result in the complexity of construction environment. High-rise landmark building is always preferred in the construction of urban core areas. Super high-rise buildings construction are facing construction management difficulties due to the complex working conditions and enormous building system, especially with the complex surrounding environment of the urban core area, the construction management of super high-rise buildings in the area requires higher, refined and detailed standard. Based on a super high-rise project in a core area of Shanghai which has 370 m building height and 772,643 m² building area, with complex surrounding environment, narrow construction site and many super-high-altitude crossing works. With the application of BIM technology, the Internet of Things, the LAN communication and other various intelligent mechanical equipment, information management systems, the efficiency and refinement of construction management are improved, ensuring the smooth implementation of the project while effectively controlling the impact on the surrounding environment.

• 경영정보학연구
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• 제24권4호
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• pp.1-22
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• 2022

코로나19 이후 비대면 소비 사회로의 전환이 일어나며 생활밀착형 라스트마일 물류 서비스인 택배 기반의 세분화된 도시 물류의 중요성이 대두되고 있다. 본 연구는 소셜 네트워크 분석(SNA)을 활용하여 지역 및 상품 특성별로 수요의 관계성을 분석하고자 한다. 전자상거래에서 수요 파악에 활용되었던 장바구니 네트워크와 공동 구매 상품 네트워크를 확장한 분석 결과 택배 주문 건 수 데이터 속에서 상품 카테고리 패턴을 발견하고 지역별 차이를 확인하였다. 이를 바탕으로 본 연구에서 제시하는 SNA 기반 분석이 도시 물류의 재고 분산 배치나 상품(SKU) 선정 전략에 효과적으로 적용될 수 있음이 확인되었다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제9권5호
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• pp.1662-1681
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• 2015

The efficient send and receive of information in VANET improves the efficiency of the safety and traffic services advertisment and discovery. However, if the V2V is the only communication system used, the restrictions of the urban environment and network drop the performance of VANET. In order to improve the performance of the network, it is necessary to use V2I communication as well as V2V communication. Therefore, RSUs must be placed in the environment. However due to the high costs of placement, the full coverage of the environment would not be possible. Therefore, it is necessary to optimally install a limited number of RSUs in the environment.

• Journal of Positioning, Navigation, and Timing
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• 제7권4호
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• pp.205-215
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• 2018

The recent emergence of new Global Navigation Satellite Systems (GNSS) has resulted in a gradual improvement in the performance of positioning services. This paper verifies the degree of improvement in positioning performance of Assisted-GNSS (A-GNSS) receivers using assistance information compared to standalone-GNSS receivers that do not use assistance information in various urban environments in Korea. For this purpose, field tests are performed in various urban and indoor environments in Korea. The assistance information is provided by u-blox's AssistNow Online and low-cost commercial receivers are used for mobile station receivers. Through experiments, the Time to First Fix (TTFF), acquisition sensitivity, and position accuracy performance improvement are analyzed. The results of the experiments show that using assistance data improved the performance in all experiment locations, and, in particular, a significant performance improvement in terms of TTFF.

• Smart Structures and Systems
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• 제30권3호
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• pp.333-338
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• 2022

Planning activity is complex process assuming the term "complexity" as a group of elements interconnected each other. The common knowledge about city planning underlines its main aim as: figuring the present, imaging the future, governing every day the territory and the way people use and live it at different scales. When considering the strength of technological opportunities and the spreading of ICT and IoT devices within everyday life, that mean within the life of cities, the complex nature of the urban system increases with the intensification of information and their connections. Recent orientations about urban and regional planning try to carry the discipline to a more flexible approach in respect to the hyperdeterminant role of direct technical applications. This passage is a fundamental aspect considering the faster and faster modifications of social and economic assets at the global and local scale. At the same time, the "environment question" became more and more relevant at the worldwide scale within the 2015 UN 2030 Agenda for Sustainable Development. Another relevant aspect about the recent urban planning orientations regards the role of the different subjects that are part of the planning process. Approaching the government of smart cities means to define how every subject, with different roles (public or private), could enrich the knowledge of the functioning of the "urban machine" and the awareness of participation of people and city users in the quality of urban life. In the paper author starts defining recent approaches in urban planning, then the nature of the city as a complex system is analyzed from the point of view of planners and of the different subjects that act in the city. Then the smart city is introduced as a further level of complexity and finally author propose the basic element of a Planning Support System.

• 한국소음진동공학회논문집
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• 제25권4호
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• pp.284-290
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• 2015

Road traffic noise is closely related with urban forms and urban components, such as population, building, traffic and land-use, etc. Hence, it is possible to minimize the noise exposure problem depending on how to plan new town or urban planning alteration. This paper provides ways to apply for urban planning in consideration of noise exposure through road traffic noise estimation for alteration of small-scale urban form. Spatial autoregressive model from the former study is used as statistical model for noise simulation. The simulation results by the spatial statistical model are compared with those by the engineering program-based modeling for 5 scenarios of small-scale urban form alteration. The error from the limitation of containing informations inside the grid cell and the difficulties of reflecting acoustic phenomena exists. Nevertheless, in the stage of preliminary design, the use of the statistical models that have been estimated well could be useful in time and economically.

• 대한원격탐사학회지
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• 제21권3호
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• pp.229-242
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• 2005

Photogrammetry is a current method of GIS data acquisition. However, as a matter of fact, a large manpower and expenditure for making detailed 3D spatial information is required especially in urban areas where various buildings exist. There are no photogrammetric systems which can automate a process of spatial information acquisition completely. On the other hand, LiDAR has high potential of automating 3D spatial data acquisition because it can directly measure 3D coordinates of objects, but it is rather difficult to recognize the object with only LiDAR data, for its low resolution at this moment. With this background, we believe that it is very advantageous to integrate LiDAR data and stereo CCD images for more efficient and automated acquisition of the 3D spatial data with higher resolution. In this research, the automatic urban object recognition methodology was proposed by integrating ultra highresolution stereo images and LiDAR data. Moreover, a method to enable more reliable and detailed stereo matching method for CCD images was examined by using LiDAR data as an initial 3D data to determine the search range and to detect possibility of occlusions. Finally, intellectual DSMs, which were identified urban features with high resolution, were generated with high speed processing.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2021년도 제64차 하계학술대회논문집 29권2호
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• pp.41-44
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• 2021

In this paper, we propose a monitoring system that can monitor gas leakage concentrations in real time and forecast the amount of gas leaked after one minute. When gas leaks happen, they typically lead to accidents such as poisoning, explosion, and fire, so a monitoring system is needed to reduce such occurrences. Previous research has mainly been focused on analyzing explosion characteristics based on gas types, or on warning systems that sound an alarm when a gas leak occurs in industrial areas. However, there are no studies on creating systems that utilize specific gas explosion characteristic analysis or empirical urban gas data. This research establishes a deep learning model that predicts the gas explosion risk level over time, based on the gas data collected in real time. In order to determine the relative risk level of a gas leak, the gas risk level was divided into five levels based on the lower explosion limit. The monitoring platform displays the current risk level, the predicted risk level, and the amount of gas leaked. It is expected that the development of this system will become a starting point for a monitoring system that can be deployed in urban areas.