• Korean Journal of Construction Engineering and Management
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• v.8 no.4
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• pp.99-109
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• 2007

Risk elements of highway safety facilities are affected by complex environments. Thus, risk-based approach for traffic safety facilities is needed. For this, in this study, qualitative and quantitative risk assessment methodology and procedure for highway safety facilities is proposed, which can be used as risk-based approach incorporating VE process. Also, for the quantitative risk assessment, event tree using EPDO(Equivalent Property Damage Only) with respect to frequency and magnitude of risk events is introduced. As a result, risk index of alternative 1(140cm) and 2(127(cm) which can be used as performance factor in VE approach are estimated.

• The Journal of the Korea Contents Association
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• v.22 no.6
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• pp.606-618
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• 2022

The purpose of the present study was to investigate the influence of rejection sensitivity on aggression and to determine the mediating role of self-esteem level and its stability. Data based on self-report questionnaires from a sample of 312(N=312) undergraduate and graduate students were analyzed using the SPSS 22.0, and the Amos 18.0. Results from the structural equation modeling indicated that rejection sensitivity had a negative impact on self-esteem level and a positive impact on self-esteem instability. Self-esteem level had a negative impact on aggression. Self-esteem instability had a positive impact on aggression. The effect of rejection sensitivity on aggression was fully mediated by self-esteem level and instability. Current findings add to the extent literature on the influence of rejection sensitivity on self-esteem level, self-esteem instability, and aggression. Implications of the present study, limitations of current study as well as suggestions for future study were also included in the discussion.

• International Journal of Highway Engineering
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• v.10 no.3
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• pp.69-77
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• 2008

This article proposes new method for estimating pedestrian quality of service(QOS) that is useful to changing pedestrian environment by examining pedestrian quality of service as well as developing new method that integrate qualitative variables into the estimating indicators for the pedestrian movement right. Based on survey questionnaire addressed to experts group, the obtained data for the indicators were analyzed through Analytic Hierarchy Process(AHP). The results show that pedestrian traffic flow(quantitative figure: 52%), sidewalk geometric(quantitative figure: 16%), sidewalk usage behavior(qualitative figure: 11%) in commercial and business zone pointed out the importance of quantitative indicators such as pedestrian traffic flow, and sidewalk geometric. In addition, the results also show that pedestrian traffic flow(quantitative figure: 30%), sidewalk geometric(quantitative figure : 22%), sidewalk usage behavior(qualitative figure: 20%) indicate the significance of qualitative indicators such as pedestrian's sidewalk usage.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.30 no.3
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• pp.27-36
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• 2002

Numerical stability is studied based on numerics and mathematics. It is frequently observed in the region where velocity is zero. In that region, the Euler equation have numerous solutions and, thus, it is impossible to determine a unique solution with only governing equations. However, a unique solution can be determined by additional outer flow conditions or outer numerical discontinuity calculation since the information or a unique solution under undisturbed conditions is lost by disturbances. In this reason, the numerical scheme comsistent with Euler equations cannot remove shock instability completely.

• Proceeding of EDISON Challenge
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• 2012.04a
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• pp.33-36
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• 2012

풍력발전기 성능은 유동의 안정성과 풍속에 의해 결정되는데, 이때 유동 불안정성은 풍력발전기의 성능뿐만 아니라 구조적 문제를 함께 유발시킨다. 본 연구에서는 풍력발전기 타워 후류에서의 불안정성을 최소화시키기 위하여 타워 단면의 기초 형상설계 연구를 수행하였다. 기존의 풍력발전기 타워 형상에 부가 구조물을 설치함으로써 Karman vortex의 생성을 지연시키고 와류 간섭현상을 줄여 풍력발전기의 안정성을 증대시키고자 하였다. 이를 위해 다양한 타워 단면 형상에 대하여 양력계수 및 항력계수를 비교 분석하였다. 그 결과 반지름의 1/2 길이의 자유류 방향 tip과 splitter plate를 후방에 설치하는 것이 후류 불안정성을 억제하는데 가장 효율적인 것으로 나타났다.

• Proceedings of the Korean Nuclear Society Conference
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• 1998.05a
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• pp.463-468
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• 1998

수직 관다발형 비등관에서의 밀도파 진동 및 유동 폭주형 이상유동 불안정성을 해석하기 위하여 선형화 기법 및 D-partition 방법론에 근거한 해석 코드(ALFS)를 개발하고 기존 실험자료 분석을 통해 코드의 예측 성능을 평가하였다. 그 결과 이상유동이 평형상태에 있는 것으로 가정하는 가장 단순한 모델인 HEM은 전반적으로 유동 불안정성 발생 시점의 열출력을 실험치보다 약 20% 정도 낮게 예측하였으며, 이상 유동의 속도 및 온도의 비평형 상태를 고려하는DEM과 DNEM에 의한 예측 결과는 7∼15%의 평균 오차 범위에서 실험 자료를 예측하는 것으로 나타났다.

• Physical Therapy Korea
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• v.7 no.4
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• pp.47-55
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• 2000

요통은 산업화된 현대사회에서 흔히 발생하는 질환이다. 요통의 다양한 원인 중에서도 척추의 정상 가동범위를 넘은 불안정성이 요통의 한 원인으로 보고되고 있다. 이 문헌고찰의 목적은 요추 부위의 안정성을 부여하는 운동 프로그램 후 근육 기능의 강화, 통증의 감소를 보고한 논문들을 비교, 분석하는 것이다. 그리하여 요통의 한 원인인 척추의 안정성을 증가시켜 요추 부위의 통증을 감소시키고 기능을 향상시키는 운동 프로그램의 효과를 입증하는 것이다.

• The Journal of Korean Institute for Practical Engineering Education
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• v.3 no.1
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• pp.127-135
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• 2011

The past quantitative analysis of the demand for job skill training had mainly focused on personnel shortage and oversupply, so it has the problems of the qualitative discrepancies called skill mismatch. As a supplementary study relating to specific industries and occupations, a discussion to improve the job skills training programs through a qualitative analysis is needed. This study provide the analysis of urgency evaluation using the relative importance and gap of the job skill elements in the display industry. And renewal possibilities of the training program based on this qualitative bottom-up approach will be discussed. We carried out a job skill demand survey in the display industry as research methods. Industry related jobs and each job task, the qualitative demand for each job skills, and procurement methods for each job skills were analyzed. Adequate supply of vocational training programs have tried to find ways by illustrating some related training courses.

• Journal of Conservation Science
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• v.33 no.1
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• pp.51-59
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• 2017

Lacquer has been used as a natural paint or adhesive in Korea since 2nd century B.C. It has been found to have been used as an adhesive as mentioned in old records and as seen in excavated relics, It was also mixed with flour, animal glue, or fish glue to produce lacquer adhesives. Qualitative analysis and evaluation of the applicability of lacquer and additives was performed in this study. The results of EGA analysis for lacquer additives confirmed that the pyrolysis temperature of lacquer, glucose glue, and animal glue. On the basis of this result, raw lacquer sample was checked that pyrolysis product that originated from urushiol side chain (R group). Components originating from glucose and amino acid were detected in glutinous rice paste and animal glue samples. In this study, the optimum pyrolysis temperature for each lacquer and additive mixture was determined from basic qualitative analysis data. By performing the qualitative analysis of each mixture, the applicability of this technique for analyzing real relics was evaluated.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.34 no.1
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• pp.189-207
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• 2023

This study focused on the public library evaluation indicators in 2022 to examine the changes and improvement recommendations. In addition, this study analyzed the results of changes in the proportion between the qualitative and quantitative evaluation. Eventually, there was a comparison between the current and previous evaluation outcomes. Furthermore, we examined the effectiveness of the current evaluation groupings of libraries. Then, we tried to discover new quantitative evaluation variables that affected the evaluation score calculation. Finally, we proposed a method for estimating variables through standardization and individualization, as well as a scheme to encourage the voluntary participation of public libraries in the evaluation.