• Proceedings of the Korea Information Processing Society Conference
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• 2005.11a
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• pp.1105-1108
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• 2005

U-Healthcare 서비스는 서비스 이용자가 서비스의 인지없이 이용자의 생체정보와 위치, 주변의 온도와 습도 정보를 수집하고 이를 분석, 가공하여 이용자에게 여러 서비스를 제공하는 것으로 이의 구현을 위해서는 무선 센서 네트워크가 필요하다. 이러한 무선 센서 네트워크에 요구되는 것은 이동성이 있는 모바일 센서 노드의 네트워크 자기 구성과 라우팅에 관한 효율적인 알고리즘이다. 이를 위해 본 논문에서는 실내에 존재하는 여러 이동성이 없는 고정 센서 노드를 기반으로 네트워크 내에 셀을 구성하여, 이 셀을 통해 인접한 이동 모바일 센서 노드의 데이터 전송을 지원하는 계층적 무선 센서네트워크 자기 구성 알고리즘을 제안하였다

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.23 no.2
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• pp.89-105
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• 2024

Bus stop improvement conveys users their usability. It is essential that transportation jurisdictions should identify quantitative effects of a bus stop improvement to invest effectively and expand consistently. Nevertheless, there is currently no research to estimate the quantitative effect on bus stops improvement. In this study, the willingness to pay and the benefit-cost ratio for the bus stops improvement were estimated through a contingent valuation method based on user satisfaction. It was found that the bus stop improvement located in urban areas can achieve high-cost benefits, and it in suburban areas has a great impact on improving the quality of life of local residents. The results of this study will be used as a basis for expanding the bus stop facility improvement project.

• The Journal of the Korea Contents Association
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• v.9 no.9
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• pp.134-142
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• 2009

Entering the twentieth century, the development and change of artworks have had influence on spectators. When spectators appreciate artworks such as paintings and sculptures, they usually show passive, contemplative attitude towards artworks. Through upheavals like the two World Wars, the change of artworks requires the participation of spectators. Active change of spectators' roles have a lot to do with the changes of artworks that spectators enjoy. With the invention of computer and development of media in the mid-twentieth century, spectators reached the position of active users. Also contemporary spectators attempt to change from users to producers. Contemporary spectators' role as producers can be examined especially in the works of $\ll$ZENetic Computer$\gg$ by Naoko Tosa. This research explored the new role of spectators to clarify this trend.

• Journal of the Korean Society for information Management
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• v.18 no.2
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• pp.125-142
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• 2001

This study attempts to identify users' potential information needs in a medium-sized academic library by analyzing reference questions raised by library users for 64 days from October 10th to December 13th, 2000. A total of 474 reference questions were analysed of which only 10.1% were pure reference questions that dealt with the professional knowledge of reference librarians. 71.0% had nothing to do with professional knowledge, being directional(29.3%), mechanic(23.8%), and library policy related(l7.9%). Improvements in sign system and guiding materials in the library should be made to deliver reference services of good quality to academic library users.

• Proceedings of the Korea Contents Association Conference
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• 2009.05a
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• pp.454-460
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• 2009

The objective of this study is to study the selection factors and satisfaction factors for different types of driving ranges and establish a basic date for marketing strategies of driving ranges. The research target group was fixed to customers older than full twenty of 12 indoor, outdoor driving ranges located in G metropolitan city & N city, M city, S city in. 564 surveys were used as effective samples. The result was achieved using the above mentioned objectives and methods.

• Journal of Information Management
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• v.39 no.2
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• pp.27-43
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• 2008

This paper analyzes feasibility studies regarding the structure, applications and issues of the library RFID system. In this study, the structure and principle, operation mode and middleware of library RFID system are reviewed in detail, Finally this paper analyzed and proposed the RFID applications that could be efficient to information management and user service of library and the major problems and improvements of library RFID system.

• Journal of the Korean Society for Library and Information Science
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• v.46 no.1
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• pp.163-181
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• 2012

We investigated how useful video tags were in summarizing video speech and how valuable positional information was for speech summarization. Furthermore, we examined the similarity among sentences selected for a speech summary to reduce its redundancy. Based on such analysis results, we then designed and evaluated a method for automatically summarizing speech transcripts using a modified Maximum Marginal Relevance model. This model did not only reduce redundancy but it also enabled the use of social tags, title words, and sentence positional information. Finally, we compared the proposed method to the Extractor system in which key sentences of a video speech were chosen using the frequency and location information of speech content words. Results showed that the precision and recall rates of the proposed method were higher than those of the Extractor system, although there was no significant difference in the recall rates.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.39 no.6
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• pp.877-886
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• 2019

The size of the subway entrance should be calculated according to the user's demand, but Korea has the same size for each entrance by applying a uniform value. Recently, the installation of mobile convenience facilities such as escalators, elevators, etc. is mandated by the traffic weakness promotion law, but it is inconvenient to use the existing stations because it is mainly arranged in the place where it can be installed regardless of user demand. This study aims to establish a model for estimating the size of mobile convenience facilities by predicting the use demand of each station entrance so that the location and size of mobile facilities can be reflected in the design or construction of the station. To this end, a multiple regression model was established to forecast daily demand by utilizing the demand for getting on and off by station and the building association area for each purpose around the railway station. The actual data of Dongdaemun and Jonggak Stations were used to verify the estimated model. In addition, the escalator installation scale was compared / analyzed by doorway using domestic and overseas escalator equations. As a result, it was more accurate to estimate the usage demand for a single station. Also, Jonggak Station has an up and down escalator installed at exit 1, but it was analyzed that it is appropriate to install at exit 4. This study is an advanced form of the essay model for estimating the users of the entrance and exit users of urban railway stations published in 2018. In addition, it seems to be the basis of the current escalator installation criteria.

• Journal of the Korean Geographical Society
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• v.30 no.4
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• pp.352-363
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• 1995

This study explores horizontal equity problems in the Seoul Subway System by using costs per passenger kilometer as a comparison index. In general, subway users in the central area, except Line 1, are subsidizing users in fringe areas. Spatial differentiation of user cross subsidies in the area is due mainly to interactions between factors such as vehicle kilometers traveled, number of passengers, and length of segments. In order to decrease levels of user cross subsidies among the users and so relieve honzontal equity problems associated with subway use, it is necessary to develop a user fare system in which portions of marginal costs of subway use can be distributed properly among users. However, two-stage fare structure of the subway system in the study area is based only on trip distance, and so marginal costs associated with subway use are not properly reflected in user fees. Therefore, horizontal equity of the system in the study area is affected because of inappropriate user fees.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.41 no.5
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• pp.571-580
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• 2021

When constructing railway stations, gates shall be located in appropriate locations for convenient use. However, to reduce construction costs, the number of gates was minimized and the location was not appropriately placed to the direction of many users. This study proposed a method to calculate the benefits of additional gate installations using the improvement of pedestrian traffic flow, occupied area and travel time as economic effects. In particular, a method of estimating the percentage of people using certain gates and the number of people by route within the station was proposed. This method was applied to analyze the effect of additional gates to Gwang-myeong Station on the Shinansan Line, which is to be opened in 2025. The effect has only improved in mobility. The first year of its opening was estimated at 5.91 billion won for mobility and 75.8 billion won for cost, and the B/C was 1.21 for 30 years after its opening. It is expected that this method will be applied to systematic effect analysis when additional gates are installed at unopened railway stations as well as existing railway stations.