• Proceedings of the KSR Conference
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• 2011.10a
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• pp.2292-2299
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• 2011

The CBTC(Communication Based Train Control) system, a recent train control system, is a wireless communication based train control system that is operated in the moving block system control by tracking trains in real time. In additioin, the system helps to increase the volume of traffic by shortening driving headways through controlling moving block system control. Furthermore, driverless modes are performed by controlling ATP(Automatic Train Protection)/ATO(Automatic Train Operation). In this paper, controllable elements in ATO driverless train control system, affecting comfortable ride, will be analysed and applied to CBTC train control system that developed by POSCO ICT. Finally, the test results of improved comfortable ride will be showed by appling the developed system to the Gyeong-san light rail transit test track.

• Journal of the Korean Society for Library and Information Science
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• v.48 no.2
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• pp.241-257
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• 2014

Seokssiwonryu originally published in China's Ming Dynasty was published twice in our country. While the engraved period of Bulamsa Temple version was clearly known from its obvious colophon indication, that of Seonunsa Temple version was not clearly identified with its colophon mentioning only its publishing temple. Thus, this study examined the relevant data such as Seonunsa Temple's history of its records and collection of the National Library of Korea, and as a result found a new fact that it had been engraved in 1710 not in 1649 as previously known.

• 제어로봇시스템학회:학술대회논문집
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• 1997.10a
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• pp.819-824
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• 1997

This paper presents a cell-based motion control strategy for soccer playing mobile robots. In the central robot motion planner, the planar ground is divided into rectangular cells with variable sizes and motion indices to which direction the mobile robot should move. At every time the multiple objects-the goal gate, ball, and robots-detected, integer values of motion indices are assigned to the cells occupied by mobile robots. Once the indices being calculated, the most desirable state-action pair is chosen from the state and action sets to achieve successful soccer game strategy. The proposed strategy is computationally simple enough to be used for fast robotic soccer system.

• Journal of Institute of Control, Robotics and Systems
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• v.17 no.7
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• pp.629-633
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• 2011

The Wolmi Eunha-Rail in Incheon is connecting Wolmido and Incheon Station with an elevated monorail road supported by piers. This railroad system is characterized by driverless automatic operation and moving-block based control. The main technology applied to this signal-controlled system is CBTC (Communications-Based Train Control) which based on wireless communications. The CBTC system is simple in that composition so that can minimize field facilities and lowers costs of construction and maintenance. This CBTC system is emerging as a major signal-controlled system in the future metro market.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.24 no.1
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• pp.143-151
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• 2000

In order to clarify the effect of tube orientation on pool boiling heat transfer, the experiments were carried out for the saturated pool boiling of water at atmospheric pressure. Through the tests a series of data sets for heat flux versus wall superheat has been obtained using various combinations of tube diameters (D=9.7 $\~$25.4mm)， surface roughness ($\varepsilon$=15.1$\~$60.9nm)， and tube orientations (horizontal and vertical). ηei experimental results show that the slope of heat flux versus wall superheat becomes smaller than that of the horizontal tube as the surface roughness decreases from $\varepsilon$=60.9 to $\varepsilon$=15.1nm. Such that， two curves for the horizontal and vertical tubes cross each other in accordance with surface roughness and the crossing point can be suggested as q" = ‘-4.768+1.334$\varepsilon$+0.055${\varepsilon}^2$.

• Journal of Korean Library and Information Science Society
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• v.35 no.4
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• pp.193-213
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• 2004

This study aims to investigate not only printed books of Great Learn(大學) published in Chosun dynasty but also existing records concerned with it as well as analyze them typically and systematically. totally 18 kinds of book of Great Learn still remain. Among them 13 kinds of book are written in Chinese(漢文本) and 5 kinds of book are written In Korean(諺解本).

• Transactions of the Korean Society of Mechanical Engineers B
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• v.31 no.7 s.262
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• pp.604-610
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• 2007

To investigate effects of the inflow area on pool boiling heat transfer in a vertical annulus, the inflow area at its bottom has been changed from 0 to $1060.3mm^2$. For the test, a heated tube of 34 mm diameter and water at atmospheric pressure have been used. To elucidate effects of the inflow area on heat transfer results of the annulus are compared to the data of a single unrestricted tube. The change in the inflow area at the bottom of the annulus results in much variation in heat transfer coefficients. When the inflow area is $113.1mm^2$ the deterioration point of heat transfer coefficients gets moved up to the higher heat fluxes because of the convective flow at the bottom regions.

• Journal of the Korean Society for Library and Information Science
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• v.42 no.2
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• pp.393-420
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• 2008

This article investigates and evaluates the relics settled from the center of the chest of triad Buddhist statue which is located in the temple of Wangryong in KyungJu as a whole. Especially, it focuses on the evaluation of the value of classical book in the course of research. As a result, it is revealed that classical books, such as Dohaekumeangkyung, Myobubyeonhwakyungsammae chambub, Jangsukyung, Seonjongyounggajib are as important printing much as to be national treasure.

• Journal of the Korean Statistical Society
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• v.25 no.1
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• pp.111-122
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• 1996

A model for a system whose state changes continuously with time is introduced. It is assumed that the system is modeled by a Brownian motion with negative drift and an absorbing barrier at the origin. A repairman arrives according to a Poisson process and repairs the system according to an (s,S) policy, i.e., he increases the state of the system up to S if and only if the state is below s. A partial differential equation is derived for the distribution function of X(t), the state of the system at time t, and the Laplace-Stieltjes transform of the distribution function is obtained by solving the partial differential equation. For the stationary case the explicit expression is deduced for the distribution function of the stationary state of the system.

• Proceedings of the KSRS Conference
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• 2005.10a
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• pp.79-82
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• 2005

Recently the necessity of road data is still being increased in industrial society, so there are many repairing and new constructions of roads at many areas. According to the development of government, city and region, the update and acquisition of road data for GIS (Geographical Information System) is very necessary. In this study, the fusion method with range data(3D Ground Coordinate System Data) and Intensity data in stand alone LiDAR data is used for road extraction and then digital image processing method is applicable. Up to date Intensity data of LiDAR is being studied. This study shows the possibility method for road extraction using Intensity data. Intensity and Range data are acquired at the same time. Therefore LiDAR does not have problems of multi-sensor data fusion method. Also the advantage of intensity data is already geocoded, same scale of real world and can make ortho-photo. Lastly, analysis of quantitative and quality is showed with extracted road image which compare with I: 1,000 digital map.