• International conference on construction engineering and project management
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• 2007.03a
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• pp.573-582
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• 2007

Working spaces in the construction site are much more complicated than completed spaces in the building. There are many researches focus on partition of building spaces. However, few discussed partition sequencing in building construction sites. Space syntax is a set of techniques for analyzing spatial configurations. It has become a useful tool in a variety of researches. Partition sequencing of working spaces should be related to the working direction. However, with convex space and axial line, the partition sequencing became unrelated to the working direction. When critical space is blocked, the partition sequencing with axial line will be changed. It is significant to reveal the impact of the entire spatial structure when some of the working spaces are blocked. This paper discussed the improved partition sequencing theory and highlighted the importance of critical space and analyzed the spatial structure of working space. A real case project was demonstrated in this paper.

• Journal of Korean Society of Transportation
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• v.26 no.1
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• pp.137-144
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• 2008

It is important to know pedestrian volume to carry out pedestrian safety analysis and pedestrian friendly design. However, it is too difficult to come across research work related to pedestrian volume analysis in the field of transport, due to lack of interests on pedestrian movement. Most transport research has been focused on vehicles and highways rather than pedestrian. On the other hand, in the field of urban studies, there comes an effective tool to estimate pedestrian volumes using Space Syntax theory. This theory twins out to be effective and economic because it only requires network information, which is easy to acquire from maps and field survey. However, this method is different in the way representing networks from the way that is common in the field of transport. To make up for this point, this paper develops a novel measure for estimating pedestrian volume using Dial's algorithm, and applies the model in the two test networks; Insadong and Soongryemoon networks. The application results reveals that developed measure is an effective tool to explain pedestrian volume; a correlation coefficient between the measure and pedestrian volume is 0.713 in Insadong and 0.492 in Soongryemoon, and the goodness of fit($R^2$) of regression models are 0.893 in Insadong and 0.671 in Soongryemoon. This estimation method is significantly less complicated to estimate the effect of a pedestrian network change than Space Syntax theory, which requires special softwares not readily available.

• Korean Institute of Interior Design Journal
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• v.19 no.4
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• pp.74-81
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• 2010

This study analyzed characteristics of visual circulation in the modern museum architecture while carrying out space syntax and visibility graph analysis side by side in order to solve problems of visitors' movement having been suggested as the point at issue at modern museum architecture that has become big scaled and layering so as to satisfy various social demands. Also, the result of this analysis is same as followings. First, visitors become to watch the exhibition with clear position that can make themselves in right allocation, and thus visual and perceptual confusions were shown as relatively low in case physical position and visual one were matched at major space of atrium type or mediation space. Second, it was appeared a lot at the museum having exhibition space of room type in case the physical position and visual one were not matched. Visual circulation in the exhibition space of room type has a merit of forming the circulation where free selection is possible. However, it have raised concerns that visual passageway of visitors could be in a stalemate or crash at the opening part, not at the exhibition hall. Third, though analysis of space syntax had a merit of analyzing total modern museum architectures having became compounded and big scaled, but it was dropped in reliability from the visual circulation's analysis that was decided by flows of space and time. In contrary, visibility graph analysis was shown as having a merit to analyzing the flows rather than that of total structure, and also appeared as being able to supplement the disadvantage of space syntax in methodology. Upon the above analysis, a lot of architectural elements such as allocation of exhibition hall, location of door and window etc. were appeared as affecting influences to forming visual circulation of visitors, not to mention of allocations of major space, mediation space, and exhibition one. Through this study, various possibilities of quantitative analysis on the visual circulation in the museum architectures can be confirmed. However, this study expects that in-depth subsequent researches objecting to various museums could be realized afterwards because there are still limitations in its analysis.

• Journal of the Korea Convergence Society
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• v.9 no.11
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• pp.315-324
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• 2018

For Korean learners, writing is a harder part than any other areas in Korean languages. But in the future, the ability to organize and write systematically is essential for future koran languages learners to take classes, do assignments and presentations at school, and then adapt to job situations. Therefore, there is a need to devise a direction for this. In general, writing characteristics are viewed in many ways, including writing productivity, writing complexity, and writing errors. Accordingly, the study provided drawings and A4 paper for Vietnamese Korean learners, Chinese Korean learners, and Korean university students, before writing freely. Based on the their writing results, we looked at syntax factors (total C-units, total number of words), syntax complexity (number of words per C-unit and clause density), and writing errors (postposition, spell errors, and connective suffix, space errors) According to the study, Vietnamese and Chinese Korean language learners showed significantly lower syntax productivity and complexity than Korean university students, and showed more writing errors than Korean students in postposition and clause density. Based on the results of the study, we discussed writing guidelines for Korean languages learners. However, this study did not validate the differences in writing characteristics according to the Korean language level and length of residences for the study subjects. Therefore, it is necessary to consider this in future research.

• Proceedings of the Korean Information Science Society Conference
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• 1999.10b
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• pp.310-312
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• 1999

본 논문은 MPEG-2 TM 5 비디오 복호기의 전체 구조와 처리과정을 기술한다. 주요한 MPEG-2 복호화 과정으로 비디오 syntax 분석, bitstream 복호 처리과정, quantization, DCT, scanning(zigzag 혹은 alternate scanning), 움직임 보상, frame 재구성, 화면 출력을 위한 dithering 과정이 있다. 본 논문에서는 MPEG-2 복호기의 핵심을 복호기 전체 구조, MPEG-2 bitstream syntax, MPEG-2 복호과정, 움직임 보상과 frame 재구성 그리고 화면 출력을 위한 dithering으로 구분하여 소개한다.

• ETRI Journal
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• v.11 no.4
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• pp.22-36
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• 1989

In this paper, a design and implementation of an efficient protocol verification system named LOVE has been described. The LOVE has been developed specifically for LOTOS. It performs not only protocol syntax validation (PSV) but also protocol functional verification(PFV). The PSV is a test to check if a protocol is free from protocol syntax errors such as deadlocks and livelocks. The PFV confirms whether or not a protocol achieves its functional objectives. For the PSV, the reachability analysis is employed, and the observational equivalence test is used for the PFV. For protocol verification using the LOVE, a schematic protocol verification methodology has been outlined.

• Proceedings of the Korean Information Science Society Conference
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• 1999.10a
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• pp.430-432
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• 1999

본 논문에서는 AST(Abstract Syntax Tree)를 이용하여 서로 다른 프로그램의 유사도를 측정하는 방법을 제시한다. 지금까지 유사도 평가 방법은 거의 제시되지 않고 프로그램의 비교평가 연구는 찾아볼 수가 없다. 본 시스템은 서로 다른 여러 프로그램을 입력받아 파싱함으로써 AST를 생성하여 생성된 AST를 유사도 측정에 이용한다. 따라서 다른 비교 측정 시스템보다 비용과 속도 면에서 경제적이고 빠르게 유사도를 검출해 낼 수 있으며, 또한 신속히 평가 결과를 학생들에게 피드백 함으로써 큰 학습성과를 기대할 수 있다.

• Review of Korean Society for Internet Information
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• v.7 no.3
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• pp.19-25
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• 2006

• Bulletin of the Korean Mathematical Society
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• v.6 no.1
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• pp.37-39
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• 1969

• Journal of Korean Society of Transportation
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• v.23 no.7 s.85
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• pp.149-158
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• 2005

The object of this paper is to develop the shortest path algorithm. The existing shortest path algorithm models are developed while considering travel time and travel distance. A few problems occur in these shortest path algorithm models, which have paid no regard to cognition of users, such as when user who doesn't have complete information about the trip meets a strange road or when the route searched from the shortest path algorithm model is not commonly used by users in real network. This paper develops a shortest path algorithm model to provide ideal route that many people actually prefer. In order to provide the ideal shortest path with the consideration of travel time, travel distance and road cognition, travel time is predicted by using Kalman filtering and travel distance is predicted by using GIS attributions. The road cognition is considered by using space data of GIS. Optimal routes provided from this paper are shortest distance path, shortest time path, shortest path considering distance and cognition and shortest path considering time and cognition.