• Journal of the Korean Geotechnical Society
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• v.17 no.2
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• pp.21-30
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• 2001

통계적 절리모델링에서 가장 불확실성이 큰 부분이 절리의 길이분포를 추정하는 것이다. 절리선 길이 분포의 추정에서 이제까지는 주로 조사선 조사(scanline survey)를 통한 절리선 반길이 분포를 이용하여 왔다. 이 연구에서는 포이송 디스크 절리모델에 대하여 보다 정밀도가 높은 절리선 길이 분포 추정방법을 찾기 위하여 조사창 조사를 이용하였다. 직사각형 및 원형 조사창에 대하여 양쪽 끝이 조사창 내부에 존재하는 절리선인 양끝내포선의 길이 분포와 한쪽 끝만이 존재하는 한끝내포선의 길이 분포를 이용, 절리선 분포를 추정하는 4개의 관계식을 각각 유도하고 컴퓨터 모의실험을 통하여 유도식의 타당성을 검증한 후 각 유도식을 이용한 절리선 분포의 추정오차를 비교하였다. 또한 절리선 분포로부터 절리직경분포를 계산하는 수치적 해를 유도하고 컴퓨터 모의시험을 통해 수치적 해에 대한 타당성을 검증하였다. 이 연구에서 제시한 조사창 조사를 이용한 절리 길이의 추정방법은 앞으로 절리모델링 분야에서 적용성이 높을 것으로 판단된다.

• Proceedings of the KSEEG Conference
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• 2000.04b
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• pp.233-234
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• 2000

• Tunnel and Underground Space
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• v.29 no.2
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• pp.89-107
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• 2019

Rock joints have an extremely important role in analyzing the mechanical stability and hydraulic characteristics of rock mass structures. Most rock joint parameters are generally indicated as a distribution by statistical techniques. In this research, calculation technique of Joint Center Volume (JCV) is analyzed, which is required for estimating the size distribution having the largest uncertainty among the joint parameters, then a new technique is proposed which is applicable regardless of the shape of survey window. The existing theoretical JCV calculation technique can be applied only to the plane window, and the complete enumeration techniques show the limitations in joint trace type and analysis time. This research aims to overcome the limitations in survey window shape and joint trace type through calculating JCV by using Monte Carlo simulation. The applicability of proposed technique is validated through the estimation results at non-planar survey windows such as curved surface and tunnel surface.

• The Journal of Sustainable Design and Educational Environment Research
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• v.17 no.1
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• pp.12-22
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• 2018

The purpose of this study is to suggest a space planning direction that can more effectively support creativity and character education in elementary school. In order to do this, we investigated the current state of space creation and the space utilization of schools that operate creativity and Character Education programs. In addition, we surveyed and analyzed the user satisfaction and demand for school space in terms of creativity and character education. The results of this study are as follows: First, 23 design criteria were drawn for each main space in which creative and character education programs are conducted. Second, we investigated the priority and satisfaction of the space that is frequently used in the school for creativity and personality education. Third, we surveyed the types and priorities of new spaces needed to cultivate students' creativity and character. Fourth, 14 concrete space planning directions for creating creativity and character education were suggested.

• Tunnel and Underground Space
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• v.26 no.3
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• pp.201-211
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• 2016

A method for estimating rock joint size distribution using contained traces length distribution from 3D cylindrical window survey was suggested. To reduce the numerical error, an improved technique was applied. The accuracy was verified by referring to Monte-Carlo simulation and it was found that the error can be decreased with suitable gamma values.

• Journal of Oral Medicine and Pain
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• v.23 no.4
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• pp.301-307
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• 1998

본 연구에서는 904nm의 다이오드 레이저를 발치창에 조사하여 효과를 분석하교, 동물실험에서 제시된 가설 즉 레이저 광조사가 주위정상조직을 자극하여 창상치유를 촉진하고 진통, 항염증효과가 있는지를 확인하고저 하였다. 먼저 19명의 발치환자에게 발치후 즉시 1분간 평균 14mW의 저수준레이저를 조사하였다. 이들중 8명은 대조군으로서 위조사(sham-irradiation)하였다. 일주일동안 시간경과에 따른 동통의 정도, 진통제의 사용횟수, 진통제 사용기간등을 각각조사하였다. Visual analogue scale로 두근에서 동통의 정도를 비교한 결과 대조군 보다 레이저 조사군에서 동통이 유의하게 감소하였으며, 진통제의 사용횟수가 기간도 레이저조사군에서 유의하게 감소하였다. 이러한 결과로 보아 비록 1분간의 적은 량의 레이저 조사라도 발치후 합병증을 억제하여 동통을 억제하고 치유를 촉진한다고 사료된다.

• Journal of Gifted/Talented Education
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• v.22 no.2
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• pp.387-410
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• 2012

The purpose of this paper was to investigate science gifted educational methods based on creativity and character by Delphi study. As a result by a total 3 round Delphi method, the concept of creativity and character education for science gifted students was to promote character development through the effectively interactive communications in the process of creative problem finding and solving. Thus this elicited the consensual agreements of experts about science gifted educational aims, methods, contents, and evaluations etc. As a follow-up research will be developed science gifted educational model based on creativity and character.

• Journal of Convergence for Information Technology
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• v.9 no.8
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• pp.205-213
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• 2019

The purpose of this study was to investigate the perception and needs on development of lecture to promote creative personality of pre-service teachers. The subjects were 161 students in 4th grade in early childhood education department. The questionnaire was composed of 3 items of 'recognition of creativity personality lecture' and 7 items of 'demand of development for creativity personality lecture'. The data was analyzed frequency and percentage by descriptive statistics. In the results, first, most of pre-service teachers recognized the importance on development of creativity personality lecture, and support of 'development and application of creativity personality lecture'. They recognized that creativity personality lecture was effective. Second, more than half of them responded that they would take creativity personality lecture, and this lecture was most appropriate 2 courses and 3 hours 10 weeks per semester. They demanded a lot of propensity element among creativity education elements, convergence classes in various fields, teaching medium for 'movie and music', and 'portfolio evaluation'.

• Tunnel and Underground Space
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• v.21 no.5
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• pp.386-393
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• 2011

This study suggests an algorithm for estimating joint diameter distribution in rock mass from the joint trace length distribution around a circular tunnel. For estimating the joint diameter distribution, the concept of Joint Center Volume (JCV) suggested by Song. (2005) was applied and the calculation method of JCV for the cylindrical window survey was developed by using the complete survey method. The estimated joint diameter distribution was verified against the original joint diameter distribution by Monte-Carlo simulation. It was observed that the estimated joint diameter distribution was converged to the original joint diameter distribution with less than 20% of error.

• Proceedings of the Korean Association for Survey Research Conference
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• 2006.12a
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• pp.307-333
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• 2006