• Journal of Fisheries and Marine Sciences Education
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• v.27 no.2
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• pp.430-440
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• 2015

The purpose of this study was to analyze student's metacognition interaction based on a robot lesson. For this research as an analytical metacognition interaction tool was utilized. The results of this study revealed that, first, elementary school students had more metacognition interaction in middle learning levels but middle school students had more in the low learning level. Second, in the low learning level, middle school students revised the initiated goal strategy of the robot lesson. Third, in all learning levels, students showed much diagnosis and assesment metacognition interaction in the robot lesson. According to this study's results, the robot lesson has a positive effect in facilitating diagnosis meta cognition for processing of task performance. These results could provide effective cues and information on how to improve the robot lesson.

• Proceedings of the KSR Conference
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• 2011.10a
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• pp.2473-2478
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• 2011

The asset management of railway facilities is a total framework for finally supporting a safe and comfortable train service, which includes functions of supporting evaluation of condition and performance of infrastructures, making the decision method of repair or rehabilitation of deteriorated facilities, and lengthening the life cycle of structure through the decision of adequate cost and time of repair or reinforcement. In the range of the asset management, organization, human, the target, and information & data of company are included. Therefore, in this paper, appling the method of asset management analysis to the railway structures, the process of the risk assesment using BRE(Business Risk Exposure) and the basis of consisting optimized renewal decision-making are expressed.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.8 no.3
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• pp.71-79
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• 2008

In this paper the glass inspection system for the thickness and flatness is implemented. Laser sensors and robot arms required for glass measurements is tested on the performance assesment. Three kinds of laser sensors are used and analysed, and 3-axis robot arm with the ball-screwed type is implemented. Thus the methods of glass measurement is discussed and the difficulties are solved to propose the solutions. To minimize the errors of glass measurement the system is improved as considered device errors.

• 한국연소학회:학술대회논문집
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• 2014.11a
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• pp.317-317
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• 2014

The structure performance of a sealed power facilities and the explosion simulation contains significant amounts of scatter, and variability has been characterized in material properties of the structure, a sealed space density, combustible gas volume, gas concentrativeness, ignition site, and gas volume. In order to deal with such uncertainties, structural reliability analysis calculates the failure probability and the reliability index relevant to selected limit states providing quantitative measures of these uncertainties. In this study, structure safety assessment method on the explosion of a sealed power facilities was proposed by using the response surface method (RSM).

• The Transactions of The Korean Institute of Electrical Engineers
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• v.59 no.6
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• pp.1034-1040
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• 2010

This paper presents a calculation method of the area of severity for the stochastic assessment of voltage sags. In general, the annual expected numbers of voltage sags at an individual load point can be estimated stochastically. However, in order to assess the system voltage sag performance considering many sensitive load points together, it is necessary to determine and analysis the area of severity for the load points. The area of severity to voltage sags is the network region where the fault occurrences will simultaneously lead to voltage sags at different load points. In this paper, the concept of the voltage sag assessment and the calculation method of the area of severity are addressed. The analysis of the area of severity is performed on the IEEE 30-bus test system by using the proposed method. The method is useful for the stochastic assesment of voltage sags and the establishment of systematic plans for voltage sag mitigation.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2001.11a
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• pp.122-126
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• 2001

본 연구는 자동차 시뮬레이터에서 정속(60∼80km/h)으로 2시간 도안 주행하는 동안 운전자의 주관적 피로감과 운전수행도에 대한 평가를 통하여 산소농도(18％, 21％, 30％)의 변화에 따른 운전 피로감을 평가하였다. 분석 결과 산소농도의 변화에 따른 주관적 피로감은 모든 산소 농도에서 시간이 경과함에 따라 유의하게 증가하였는데 특히 저농도의 산소일 때가 다른 산소 조건들에 비해 높았고 고농도의 산소일 때 낮았다. 또한, 브레이크 반응 시간은 고농도의 산소일 때가 저농도의 산소에 비하여 유의하게 감소하였다. 이와 같이 산소 조건에 따른 운전 피로감의 현저한 차이를 볼 수 있었다.

• Proceedings of the KSR Conference
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• 2002.05a
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• pp.549-554
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• 2002

Recently, interest in hygiene has been arouse in the health care field. Consequently, Filters with antibacterial agent applied to improve air quality by sterilizing bacteria, fungi, etc. We actually installed antibacterial air filter containing 2.5wt%Ag zeolite on the air intake route to air-conditioner in passenger cu, and evaluated filter's performance on antibacterial effect. By the microbe liquid spattering method, we found that the antibacterial air filter has notably sufficient antibacterial efficiency against standard strains and wild type strains. Antibacterial effect was observed at whole area of filter media by zone of inhibition test. The evaluation of microbe quantity was conducted through mixing dilution plate culture method. In comparison with ordinary filter, the amount of germs attached on antibacterial air filters was larger. The amount of germs attached on ordinary filters was very small since ordinary filters contained less dust. In comparison in antibacterial air filter with thickness, the amount of germs attached on 9mm filter was smaller than that of on 6mm filter. i.e. thicker filter, superior efficiency.

• Journal of Korean Institute of Industrial Engineers
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• v.40 no.4
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• pp.366-374
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• 2014

This study assessed and analysed a result of a product design experiment through Product Data Analytics (PDA), to find reasons for failure of some projects in the experiment. PDA is a computer-based data analysis that uses Product Data Management (PDM) databases as its operational databases. The study examines 20 product design projects in the experiment, which are prepared to follow same product development process by using an identical PDM system. The design result in the PDM database is assessed and analysed by On-Line Analytical Processing (OLAP) and data mining tools in PDA. The assesment and analysis reveals the lateness in creation of 3D CAD models as the main reason of the failure.

• Journal of the Korean Society of Safety
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• v.23 no.5
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• pp.1-6
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• 2008

`SOS', Simulator Of Safety assessment for fire, was developed to simulate fire safety assessment for a structure which is geometrically complex. The program(SOS) is intended to use for searching as well as designing tools to analyse the evacuation safety through a wide range of structure conditions. The computer program has a function which importing FDS's calculating results to each individual resident in the structure. These attributes include a walking speed reduction by producing visibility reduction for each person on the fire. $A^*$ pathfinding algorithm is adopted to calculate the simulation of escape movement, overtaking, route deviation, and adjustments individual speeds in accordance with the proximity of crowd members. This SOS program contributes to a computer package that evaluates the fire safety assessment of individual occupants as they walk towards, and through the exits especially for building, underground spaces like a subway or tunnel.

• Journal of Korean Society of Transportation
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• v.7 no.2
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• pp.71-87
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• 1989

The objectives of this study are first, to evaluate the actual performance of the Transportation Impact Assesment System of Korea, second, to find the institutional problems of the system, and third, to seek for the best improvement of the system. Total 70 assessment reports performed in 1988 and judgements of the municipal councils of the reports were inspected. And the legal system of all levels were reviewed. According to the results, there are some needs to expand the number of cities subject to the assessment system. And the several regulations about the qualification of the agents assessing transportation impacts, the composition and operation of the municipal councils, and the timing of assessing the impacts are turned out improper. A proper alternative of amendment of the regulations are recommended. And the establishment of central council for judging assessments of hudge facilities, adoption of joint assessment of facilities bellow the standard, post occupancy assess ent, and transportation fee system were also recommended.