• Journal of Korea Multimedia Society
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• v.12 no.3
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• pp.445-450
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• 2009

This paper presents a multi-phase fluid simulation that realistically represents small scale details. We achieve this by creating escaped particles based on physical methods. Escaped particles are the remained particles after correcting levelset. Generation of escaped particles in this paper differs from previous works; this fluid simulation is extended by adding lift force and drag force to positive escaped particles. And negative escaped particles represent droplet or splash effect; when they are merged into the negative levelset value, they affect the nodes' velocity (two-way coupling). This simulation that uses positive and negative escaped particles deals with detailed fluid motions dynamically in small scale.

• Journal of Labour Economics
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• v.43 no.2
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• pp.41-74
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• 2020

In this study, using the job history data of the Youth Panel(1-12th year: 2007 ~ 2018) of the Korea Employment Information Service, it is found that characteristics and duration distribution of first jobs of wage and salary worker, and estimated the factors of first job exit by utilizing survival analysis. As a result of the analysis, regular workers are less likely to leave their first jobs than temporary/daily workers. In addition, the group with a high degree of major congruence was found to have a lower chance of leaving the first job than the group with a major mismatch. And the higher the income level, the lower the probability of departure, which shows that the possibility of leaving low-income workers is very high.

• Proceedings of the Korean Nuclear Society Conference
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• 1996.05b
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• pp.751-755
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• 1996

CE형 발전소 설계시 사용된 일부 전산코드들이 한시적으로 사용이 허가되어 국내 고유 전산코드로의 대체가 불가피하게 되었으며 그 예로 제어봉 이탈사고 해석에 사용된 STRIKIN II 코드를 들 수 있다. 한편 원자력 연구소에서 개발한 범용 전산코드 TASS의 노심 출력 계산은 1차원 확산 모델을 사용하여 축방향 노심 출력 계산이 가능하다. 본 논문에서는 이러한 전산코드 사용의 문제를 해결하고 또한 1차원 확산 모델의 제어봉 이탈 사고에 대한 적용 계산을 위해 TASS를 사용하여 제어봉 이탈사고 해석을 수행하고 그 대체 및 적용 가능성과 그 효과를 평가하였다. 계산 결과 1 차원 확산 모델을 사용한 TASS 결과가 Point Kinetics모델을 사용한 STRIKIN II 결과에 비해 보다 많은 운전 여유도를 확보하는 것으로 나타나 대체 및 적용 가능성을 확인하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2022.05a
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• pp.21-24
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• 2022

최근 통신업계에서는 축적된 빅데이터를 활용하여 고객의 특성을 이해하고 맞춤형 마케팅에 이용하려는 노력이 지속되어 왔다. 본 연구에서는 CatBoost 모델을 사용하여 이탈 가능성이 높은 고객을 예측하고 XAI(eXplainable Artificial Intelligence) 기법 중 하나인 SHAP을 적용하여 이탈에 영향을 미치는 요인을 설명하고자 하였다. SHAP의 global explanation 기법을 사용하여 특정 고객 segmentation 에 대한 이해력을 높이고, local explanation 기법을 사용하여 개별 고객에 대한 설명과 개인화 마케팅에 적용 가능성을 제시하였다. 본 연구는 기존의 이탈 예측모델인 블랙박스 모델이 갖는 한계점을 극복하고 고객의 특성을 이해하여 실제 비즈니스에 활용 가능성을 높였다는 점에서 의의를 가진다.

• Korean Journal of Legislative Studies
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• v.25 no.2
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• pp.69-101
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• 2019

The purpose of this study is to verify that voting behavior of congressmen can vary depending on the different candidate selection methods of political parties. Specifically, this paper examines whether congressmen elected through a primary tend to deviate from the party line vote in the floor voting, compared to those who did not. As a result, it was founded that congressmen who went through competition of the primary are more likely to defect from the party line vote than who did not. This empirical evidence suggests that if the introduction of the open primary system is further expanded in the future, it may lead to weakening of party cohesion and reinforcing lawmakers' autonomy.

• Archives of design research
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• v.14 no.1
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• pp.119-134
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• 2001

It can be said that Italian designs are unrestrained, aesthetic and art for arts sake, and they come to stylize their character based on geographical features, racial traits and culture. The Italian architects work for the reconstruction of their devastated country and spare no pains to produce competitive goods on international markets since the second wend war. In spite of a inherent scarcity of resources, Italian furniture is the product of mixture of aesthetic material and new material with creative gifts. A lot of companies succeed in finding and training capable designers and devote themselves to modem furniture industry. As a result, Italy becomes one of the worlds most eminent furniture industrial countries now. And the fame is owed to Italy's national awareness of the importance of the matter and endeavor without sparing systematic support. This research is to find out which factors have an influence on the progress of furniture design in Italy and to analyze how these factors build up formative arts combining with historical background in Italy. Moreover, this research suggests how to make contributions to the cause of furniture design growth when considering our geographical features, racial characteristics, culture and industrial circumstances, by analyzing the process of development and strategy in Italian design industry.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.22 no.2
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• pp.514-521
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• 2021

When calculating an intersection collision speed using a formula, it is very difficult to grasp the degree of deceleration of a vehicle after the collision unless there is road surface trace in the entire section where each vehicle moved from the point of collision to their final positions after the collision. A vehicle's motion trajectory shows an irregular curve after a collision due to the effects of inertia based on the driving characteristics of the vehicle, the eccentric force according to the collision site, and the collision speed. Therefore, it is very important to set the appropriate departure angle after a collision for accurate collision speed analysis. In this study, based on experimental collision data using a computer simulation (PC-Crash), the correlation between an appropriate vehicle departure angle and the post-collision speed was analyzed, and then, a regression analysis model was derived. Through this, we propose a method to calculate collision speed by applying only the vehicle departure angle in some types of collisions for traffic accidents at intersections.

• Electronics and Telecommunications Trends
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• v.24 no.2
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• pp.131-141
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• 2009

통신서비스 시장은 유무선 및 통신과 방송서비스의 컨버전스화가 진행됨에 따라 미래 시장에서의 경쟁구도에 관심이 집중되고 있다 최근 영국, 이탈리아 등 유립을 중심으로 지배적 사업자의 병목설비에 대한조직분리의 일환으로 기능분리가 활발하게 논의 및 도입되고 있다. 이 중 이탈리아는 TI에 대한 운영분리 수준의 구조규제를 기능분리 수준으로 강화하였다. 이는 운영분리와 같은 구조적인 조치에도 불구하고 TI의 지배력 유지, 경쟁 사업자들의 지속적 불만 제기 등의 문제가 해결되지 않은데다가 TI의 소유구조 변화에 따른 네트워크의 안정성 및 보안성에 대한 우려에 따른 것으로 해석되고 있다. 이탈리아의 기능분리는 동등접속을 위한 사업부로 Open Access의 설립, 신규 인센티브 제도, 각종 투명성 확보장치, 감독기관의 신설 등의 내용이 포함되어 있으며 근본적인 원칙은 영국의 경우와 유사하다. TI는 기능분리를 통해 규제기관과의 관계 개선, 소매시장 규제완화 등의 효과를 기대하고 있으며 2008년 2월 Open Access를 출범하였다.

• Korean Journal of Childcare and Education
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• v.11 no.6
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• pp.59-78
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• 2015

This study aims to explore the relationship between North Korean refugee mothers' perceived home psychological characteristics and ego-resilience of their young children focusing on moderating effect of social support. For this purpose, we sampled 96 North Korean refugee mothers with 3-5 year old children. Home psychological characteristics consisting of family strength, family environment and family functioning, social support, and ego-resilience was analyzed by Pearson correlation analyses and hierarchical regression method. The results of this study were as follows. First, there is a significant correlation between North Korean refugee mothers' perceived home psychological characteristics and ego-resilience of their young children. Second, the perceived factors by North Korean refugee mothers of home psychological characteristics explained their young children's self-resilience 73.4% of the time and social support had a significant moderating effect. These results suggest that more effective social support to North Korean refugees has to be offered. Not only financial but emotional support is also needed.

• The Journal of the Korean dental association
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• v.51 no.5
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• pp.250-254
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• 2013

Modern theories and concepts of occlusion for implants and natural teeth have originated in complete denture construction. Bilateral balanced occlusion as the occlusal scheme of choice has a long history in complete denture construction. The reason that occlusion has always been a consideration in the provision of removable prosthetics is because the adoption of good occlusal practice has a significant and immediate impact on the overall success of the treatment, as it affects denture stability. However, clinicians must remember that there are multiple ways, both successful and unsuccessful, to complete the restoration of a patient's occlusion. The goal is to meet the physiologic, functional, and esthetic needs of the individual patient while applying knowledge, accurate diagnosis, experience, clinical judgement, and attention to detail. This paper describes the features of an ideal occlusion in removable prosthodontics, why these features make it ideal for denture stability, and some technique for achieving these aims.