• 한국정보교육학회:학술대회논문집
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• 2006.08a
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• pp.117-122
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• 2006

고도의 지식기반사회에서는 사고력과 문제해결력을 길러주는 프로그래밍 교육이 필요하며 이를 초등학교 교육과정부터 도입해야 한다는 여러 연구들이 있었다. 본 연구에서는 그러한 프로그래밍의 기초능력을 배양하기 위하여 프로그래밍 변수 개념 형성을 위한 효과적인 학습 모형을 구안하고자 하였다. 구체적 조작활동을 통해 인지를 형성하는 초등학교 아동들에게 LOGO 프로그래밍 활동이 적합하다는 선행연구를 토대로, 영어에 미숙한 아동들을 고려하여 MAL-LOGO 환경을 선택하였으며, 프로그래밍 학습요소 중 변수 개념 형성을 위한 학습요소를 추출하고, 교수-학습 프로그램을 계획하였다. 인지적 모니터링 전략(cognitive monitoring strategy)을 발달시킬 수 있는 안내된 발견식 교수법(guided instruction teaching method)을 기반으로 교수-학습 모형을 구안 적용한 후, 사전 사후 평가를 통해 그 효과를 검증하였다.

• Journal of Mechanical Science and Technology
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• v.14 no.10
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• pp.1089-1103
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• 2000

A Problem of relevant interest to some industries is that of obtaining optimum two-dimensional layout. To solve this provlem, one is given a number of rectangular sheets and an order for a specified number of each of certain types of two-dimensional regular and irregular shapes. The aim is to cut the the shapes out of the sheets in such a way as to minimize the amount of waste produced. A DCS (Distributed Control System) is an integrated system which applies the decentralization concept to a control system handling both sequential and analog control. A DCS performs many operations such as data gathering, data processing, data storing and monitoring the operatin conditions for the operator. IN this paper, we propose a genetic algorithm based on rotation parameters from which the best pattern of layout is found as well as a layout method for better performance time. A DCS for the plate cutting process system, which is performed by a virtual system, is also identified.

• Proceedings of the KIPE Conference
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• 2002.07a
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• pp.715-718
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• 2002

As the modern technology of continuous casting plant is focused on improvement of slab quality, the control system of strand driven roll which has positive effect is investigated in this paper. An irregular distribution of withdrawal force gives rise to horizontal crack in high and middle grade carbon steel. Based on the basic understanding on design concept of high technology company, monitoring the withdrawal force distribution of strand driven roll and analysis of the control system was Performed at continuous casters of POSCO. The control algorithm of withdrawal force distribution for A.C motor vector control, which was derived from above study and had been applied for POSCO Kwangyang 1-4 continuous casting plant, is presented.

• Journal of the Korean Applied Science and Technology
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• v.27 no.2
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• pp.144-151
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• 2010

Over the years, scientists have developed many test methods to evaluate the efficacy of skin care products. The needs for objective assessment have stimulated to develop instruments that are capable of reliably monitoring some parameters in evaluating skin conditions. The beauty is evaluated as a measure of smoothness of skin surface. Quantitative size measurements of skin pores is also important concept to evaluate the their conditions. The purpose of this paper is to measure the temperature change of skin and the size of pores in the skin. The pore sizes were changed by its varying skin temperature. They were decreased by applying a essence which is contained with propellant and contents.

• Journal of Korea Society of Digital Industry and Information Management
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• v.6 no.4
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• pp.83-94
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• 2010

Mobile network infrastructure is being completed with the development of hardware and software for mobile devices. Network in mobile devices has evolved for telematics that is expanded much more than its existing concept. Telematics is compound word that is formed from the words "telecommunication" and "informatics". It means that telematics performs control and monitoring service with using mobile device resources. These services provide their services for users' requests through wired or wireless network from mobile devices and server that offers contents and network service collects management information of mobile devices. Map service is one of the preferred services for many telematics users. However, mobile map service has a limit between traffic and information sharing. Therefore it is very important to supply their information for both service provider and terminal user. In this paper, we design a new interactive sketch map using routes and information on the space to be applied effectively, and provide an extended document format that is defined to an extensible and dynamic clustering scheme to have portability map service for mobile device.

• Proceedings of the Korean Society for Quality Management Conference
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• 2004.04a
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• pp.57-63
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• 2004

CUSUM control charts are widely used to monitor processes with small shifts. CUSUM control charts, however, are less effective in detecting for recurring cycles or frequent small shifts in the process. With Shewhart control charts, we have applied the variety of run rules to check the stability of process in addition to the situations that some points fall outside the control limits. In this paper, we propose the Z-CUSUM control chart for monitoring the process with recurring cycles or frequent small shifts by use of the zone concept as like the Shewhart control charts.

• Journal of the Korean Society for Precision Engineering
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• v.12 no.10
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• pp.18-24
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• 1995

This paper describes a multi-computer system developed for CIM(Computer Integrated Manufacturing) system, which combines single board computers and personal computers by using RS422/485 communication and LAN. The system adopts a concept of hot run back up system based on dual CUP system of host and supervisor structure. The dual CPU system and the single board computer are respectively developed using 32 bits microcomputer and 16 bits microprocessor. 8097BH. The multi communication between two types of system is done by using RS 422/485, and also data logging computers are linked with LAN.

• Journal of the Optical Society of Korea
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• v.5 no.1
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• pp.9-15
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• 2001

The ocean Scanning Multi-spectral Imager (OSMI) is a payload on the KOrea Multi-Purpose SATellite (KOMPSAT) to perform worldwide ocean color monitoring f the study of biological oceanography. OSMI performs solar and dark calibrations for on-orbit instrument calibration. The purpose of the solar calibration is to monitor the degradation of imaging performance for each pixel of 6 spectral bands and to correct the degradation effect on OSMI image during the ground station date processing. The design, the operation concept, and the radiometric characteristics of the solar calibration are investigated. A linear model of image response and a solar calibration radiance model are proposed to study the instrument characteristics using the solar calibration data. The performance of spectral responsivity and spatial response uniformity. The first solar calibration data and the analysis results are important references for further study on the on-orbit stability of OSMI response during its lifetime.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2002.10a
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• pp.636-640
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• 2002

In contrast to conventional CNC, PC-NC opens a new era for machine tools to be more intelligent. For instance, machine tool with PC-NC can be a machine agent system with capability of reacting autonomously to changing operating conditions. This paper introduces a concept of intelligent machine agent system, composed of machine agent and cell manager. Machine agent performs the functions such as process monitoring, diagnosis, maintenance management, condition assessment and schedule negotiation, while cell manager coordinates the negotiation process among multiple machine agents.

• Tunnel and Underground Space
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• v.4 no.1
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• pp.47-54
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• 1994

NATM has been applied most of tunnel design and construction in Korea these days. But, if you observe the tunnel designing method and construction conditions, you can see that the NATM isn's usually the most suitable to Korean geology. Also most of engineers feel that it is necessary to understand the NATM correctly adn to introduce another tunnelling principle which can be applied more economically and safely. So, we'd like to introduce a new tunnelling concept. Norwegian Method of Tunnelling(NMT) by comparing the NATM. The main character of NMT is that the forward prediction of conditions and the support of tunnel is done through geological investigation in details. And it can be compared with NATM, in which the support pattern is decided by monitoring of tunnel deformation on the construction.