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한국의 인터넷 게임 셧다운제 정책의 효과성에 대한 연구
전종수 한국게임학회 2014 한국게임학회 논문지 Vol.14 No.6
본 논문은 국내에서 실시되고 있는 인터넷게임 셧다운제의 효과성에 대한 분석을 한다. 청소년보호를 목적으로 정부(문화체육관광부와 여성가족부)에 의하여 실시되고 있는 선택적 셧다운제와 강제적 셧다운제의 효과성을 검증하는 데 중점을 둔다. 분석 결과 인터넷게임과 게임중독간의 원인관계를 명확히 증명하기 어렵다. 또한 인터넷게임 셧다운제 정책만으로는 인터넷게임 중독을 예방할 수 없음을 밝힌다. 이를 기반으로 하여 청소년들의 인터넷게임 중독예방을 위한 다양한 정책을 제언한다. This paper shows an analysis of the effectiveness of internet games shutdown policy being conducted in Korea and focusing on a verification of the effects of the selective games shutdown and the compulsory games shutdown running for the prevention of adolescents' addiction by korea government (Ministry of Culture, Sports and Tourism, Ministry of Gender Equality and Family). According to the results, It is difficult to clearly prove the causal relations between internet games and addiction. Also the internet games shutdown policy is not only the most effective means for preventing internet games addiction. On the basis of it, this paper proposes effective policy measures to prevent the internet game addiction of adolescents.
Fragility characteristics of skewed concrete bridges accounting for ground motion directionality
전종수,최은수,노명현 국제구조공학회 2017 Structural Engineering and Mechanics, An Int'l Jou Vol.63 No.5
To achieve this goal, two four-span concrete box-girder bridges with typical configurations of California highway bridges are selected as representative bridges: an integral abutment bridge and a seat-type abutment bridge. A detailed numerical model of the representative bridges is created in OpenSees to perform dynamic analyses. To examine the effect of earthquake incidence angle on the fragility of skewed bridges, the representative bridge models are modified with different skew angles. Dynamic analyses for all bridge models are performed for all earthquake incidence angles examined. Simulated results are used to develop demand models and component and system fragility curves for the skewed bridges. The fragility characteristics are compared with regard to earthquake incidence angle. The results suggest that the earthquake incidence angle more significantly affects the seismic demand and fragilities of the integral abutment bridge than the skewed abutment bridge. Finally, a recommendation to account for the randomness due to the ground motion directionality in the fragility assessment is made in the absence of the predetermined earthquake incidence angle.
전종수,Abdollah Shafieezadeh,Reginald DesRoches 국제구조공학회 2018 Structural Engineering and Mechanics, An Int'l Jou Vol.65 No.5
This paper presents the results of an assessment of the seismic fragility of a long, curved multi-frame bridge under multi-support earthquake excitations. To achieve this aim, the numerical model of columns retrofitted with elliptical steel jackets was developed and validated using existing experimental results. A detailed nonlinear numerical model of the bridge that can capture the inelastic response of various components was then created. Using nonlinear time-history analyses for a set of stochastically generated spatially variable ground motions, component demands were derived and then convolved with new capacity-based limit state models to obtain seismic fragility curves. The comparison of failure probabilities obtained from uniform and multi-support excitation analyses revealed that the consideration of spatial variability significantly reduced the median value of fragility curves for most components except for the abutments. This observation indicates that the assumption of uniform motions may considerably underestimate seismic demands. Moreover, the spatial correlation of ground motions resulted in reduced dispersion of demand models that consequently decreased the dispersion of fragility curves for all components. Therefore, the spatial variability of ground motions needs to be considered for reliable assessment of the seismic performance of long multi-frame bridge structures.