• Title/Summary/Keyword: Road user communication technology

Search Result 8, Processing Time 0.018 seconds

Exploring the Key Priority of V2H Communication Technology Using the KANO Model (KANO 모델을 활용한 V2H 커뮤니케이션 기술의 우선순위 분석)

  • SangHwa, Lee;SooHee, Kang;Jeong Ah, Jang
    • Journal of Auto-vehicle Safety Association
    • /
    • v.14 no.4
    • /
    • pp.91-99
    • /
    • 2022
  • In Korea, various studies on autonomous vehicles are being conducted with the aim of commercializing the fully autonomous driving (Lv.4) on major roads in 2027. Currently, the communication between non-autonomous vehicles and road users is made with gestures, eye contact, and verbal signals. In the case of autonomous vehicles in the future, autonomous vehicles should communicate instead of drivers. Recently, V2H communication technology (communication technology between autonomous vehicles and road users) is being developed. This study shows technology priorities using the KANO model in caution (warning) and traffic (concession) situations. As a result, a total of six attractive quality technologies were analyzed: technology to provide dark warning information in a display graphic; technology to provide dark warning information in a projection graphic; technology to provide light concession information in a display graphic; technology to provide dark concession information in a display graphic. In the future, it will investigate the preference of users in providing V2H information by road situation. It will be used as a V2H design priority.

Road Network Distance based User Privacy Protection Scheme in Location-based Services (위치 기반 서비스에서 도로 네트워크의 거리 정보를 이용한 사용자 정보 은닉 기법)

  • Kim, Hyeong Il;Shin, Young Sung;Chang, Jae Woo
    • Spatial Information Research
    • /
    • v.20 no.5
    • /
    • pp.57-66
    • /
    • 2012
  • Recent development in wireless communication technology like GPS as well as mobile equipments like PDA and cellular phone makes location-based services (LBSs) popular. However, because users request a query to LBS servers by using their exact locations while moving on the road network, users' privacy may not be protected in the LBSs. Therefore, a mechanism for users' privacy protection is required for the safe and comfortable use of LBSs by mobile users. For this, we, in this paper, propose a road network distance based cloaking scheme supporting user privacy protection in location-based services. The proposed scheme creates a cloaking area by considering road network distance, in order to support the efficient and safe LBSs on the road network. Finally, we show from our performance analysis that our cloaking scheme outperforms the existing cloaking scheme in terms of cloaking area and service time.

Children's Education Application Design Using AR Technology (AR기술을 활용한 어린이 교육 어플리케이션 디자인)

  • Chung, HaeKyung;Ko, JangHyok
    • Journal of the Semiconductor & Display Technology
    • /
    • v.20 no.4
    • /
    • pp.23-28
    • /
    • 2021
  • Augmented reality is a technique for combining virtual images into real life by showing information of virtual 3D objects on top of a real-world environment (Azuma et al., 2001). This study is an augmented reality-based educational content delivery device that receives user input that selects either a preset object or a photographed object for augmented reality-based training; It includes a three-dimensional design generation unit that generates a stereoscopic model of the augmented reality environment from an object, a three-dimensional view of the scene, a disassembly process of the developing road from a three-dimensional model, and a content control unit provided by the user terminal by generating educational content including a three-dimensional model, a scene chart, a scene, a decomposition process, and a coupling process to build a coupling process from the scene to the three-dimensional model in an augmented reality environment. The next study provides a variety of educational content so that children can use AR technology as well as shapes to improve learning effectiveness. We also believe that studies are needed to quantitatively measure the efficacy of which educational content is more effective when utilizing AR technology.

OLAP4R: A Top-K Recommendation System for OLAP Sessions

  • Yuan, Youwei;Chen, Weixin;Han, Guangjie;Jia, Gangyong
    • KSII Transactions on Internet and Information Systems (TIIS)
    • /
    • v.11 no.6
    • /
    • pp.2963-2978
    • /
    • 2017
  • The Top-K query is currently played a key role in a wide range of road network, decision making and quantitative financial research. In this paper, a Top-K recommendation algorithm is proposed to solve the cold-start problem and a tag generating method is put forward to enhance the semantic understanding of the OLAP session. In addition, a recommendation system for OLAP sessions called "OLAP4R" is designed using collaborative filtering technique aiming at guiding the user to find the ultimate goals by interactive queries. OLAP4R utilizes a mixed system architecture consisting of multiple functional modules, which have a high extension capability to support additional functions. This system structure allows the user to configure multi-dimensional hierarchies and desirable measures to analyze the specific requirement and gives recommendations with forthright responses. Experimental results show that our method has raised 20% recall of the recommendations comparing the traditional collaborative filtering and a visualization tag of the recommended sessions will be provided with modified changes for the user to understand.

Voronoi-Based Search Scheme for Road Network Databases (도로 망 데이터베이스를 위한 보로노이 기반의 탐색 방안)

  • Kim, Dae-Hoon;Hwang, Een-Jun
    • Journal of IKEEE
    • /
    • v.11 no.4
    • /
    • pp.348-357
    • /
    • 2007
  • Due to the improved performance and cost of personal mobile devices and rapid progress of wireless communication technology, the number of users who utilize these devices is increasing. This trend requires various types of services be available to users. So far, there have been many solutions provided for the shortest path problem. But, technologies which can offer various recommendation services to user depending on user’s current location are focused on Euclidean spaces rather than road network. Thus, in this paper, we extend the previous work to satisfy this requirement on road network database. Our proposed scheme requires pre-computation for the efficient query processing. In the preprocessing step, we first partition the input road network into a fixed number of Voronoi polygons and then pre-compute routing information for each polygon. In the meantime, we select the number of Voronoi polygons in proposition to the scale of road network. Through this selection, the required size of pre-computation is linearly increasing to the size of road network. Using this pre-computated information, we can process queries more quickly. Through experiments, we have shown that our proposed scheme can achieve excellent performance in terms of scheduling time and the number of visited nodes.

  • PDF

Economic Feasibility of Common Utility Tunnel based on Cost-Benefit Analysis (비용편익 분석에 기초한 공동구의 경제적 타당성 평가)

  • Kang, Yeong Ku;Choi, Ik Chang
    • Journal of the Korean Society of Safety
    • /
    • v.30 no.5
    • /
    • pp.29-36
    • /
    • 2015
  • Common utility tunnel is essential to the daily lives of people underground utilities (electricity, gas and supply facilities such as water, communication facilities, sewer facilities, etc.) to improve the appearance by co-acceptance and disaster prevention, important for the conservation of the city's population was concentrated road construction the city-based facilities. There is recognition of the importance of the various supply treatment facilities in common utility tunnel as infrastructure to accommodate joint according to the city expanded, the demand for infrastructure. In this paper, a cost-benefit analysis using a one-time occurrence, without simply relying on cost or current cost, project manager for the city-dimensional feasibility study conducted, the user level of the maintenance costs and user costs, including social costs items from various angles can be investigated and proposed a mechanism of economic feasibility common utility tunnel. Evaluation of the proposed technique is cost-benefit and cost caused by installing common utility tunnel the existing pipeline area - was investigated by the benefit analysis, extended and repeated common utility tunnel installation depends much affected by the excavation, so users of reducing the number of repeat excavation convenience can be seen that this occurs.

The Design and Implementation of a Vehicle Location Tracing System using RM Multi-Session Processing (RM 다중세션 처리를 이용한 차량 추적 시스템의 설계 및 구현)

  • Lee, Yong Kwon;Jang, Chung Ryong;Lee, Dae Sik
    • Journal of Korea Society of Digital Industry and Information Management
    • /
    • v.10 no.2
    • /
    • pp.61-73
    • /
    • 2014
  • An automatic vehicle location tracing system is to build GIS server and on transmission for providing service in various ways by collecting a GPS location information from each vehicle. It is to save GPS data from OBU built-in on the vehicle and transmit the GPS data using the RSU on the roadside and WAVE communication technology. The collected data from the RSU is transmitted to the GIS server and stored in DB(database) and based on the GPS data that was collected from the each vehicle the system is to provide user service to suit the applications so it is to provide various services between RSU and OBU. In this paper, by implementing a multi-session process between the RM and the RMA a variety of services between RSU and OBU are provided. In addition, the system is designed and implemented using GPS to provide a variety of services, for the services provided from each RMA by configuring them as an independent session so it enables a variety of services implemented from one of RSU. With the result of the comparative analysis on the multi-session processing and single-session processing it shows that the differenes of them are minor in repect of the data loss rate and the data transfer rate but various services can be provided.

A K-Nearest Neighbour Query Processing Algorithm for Encrypted Spatial Data in Road Network (도로 네트워크 환경에서 암호화된 공간데이터를 위한 K-최근접점 질의 처리 알고리즘)

  • Jang, Mi-Young;Chang, Jae-Woo
    • Spatial Information Research
    • /
    • v.20 no.3
    • /
    • pp.67-81
    • /
    • 2012
  • Due to the recent advancement of cloud computing, the research on database outsourcing has been actively done. Moreover, the number of users who utilize Location-based Services(LBS) has been increasing with the development in w ireless communication technology and mobile devices. Therefore, LBS providers attempt to outsource their spatial database to service provider, in order to reduce costs for data storage and management. However, because unauthorized access to sensitive data is possible in spatial database outsourcing, it is necessary to study on the preservation of a user's privacy. Thus, we, in this paper, propose a spatial data encryption scheme to produce outsourced database from an original database. We also propose a k-Nearest Neighbor(k-NN) query processing algorithm that efficiently performs k-NN by using the outsourced database. Finally, we show from performance analysis that our algorithm outperforms the existing one.