• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.36 no.6
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• pp.565-573
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• 2008

The behavior-based decentralized approach is considered for multi-UAV formation flight. It is assumed that each UAV has its own mission of flying to a specified region, while the distances between UAVs should be maintained. These two requirements may conflict with each other. To design the controller, coupled dynamics approach is applied to multi-UAVs with an assumption that each UAV can communicate with each other to share the state-information. Control gain matrices are optimized to acquire better performances of formation flying. To validate the proposed control approach, numerical simulation is performed for the waypoint-passing mission of multi-UAVs.

• Proceedings of the Korean Society of Computer Information Conference
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• 2019.07a
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• pp.175-176
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• 2019

본 연구에서는 본 연구의 목적은 청소년 일탈행위가 학업성취도에 어떠한 영향을 미치는지를 살펴보고 청소년문제의 기초자료 활용과 시사점의 제공에 목적을 두고자 하였다. 이를 위해 통계자료를 활용하여 요인분석은 Varimax에 의한 직교회전에 의하여 요인적재치를 산출하였고, 설문문항에 대한 측정은 크론바하 알파계수(Crobach's Alpha)를 이용하여 신뢰도 검증을 실시하였다. 연구결과 먼저, 학업생활의 전념이 성에 따라 일탈행위에 유의미한 영향을 미치지 않은 것으로 나타났다. 둘째, 비행친구와의 접촉이 성에 따라 일탈행위에 유의미한 영향을 미치는 것으로 나타났다. 셋째, 학업성취도가 성에 다라 일탈행위에 유의미한 영향을 미치는 것으로 나타났다.

• Journal of Korea Game Society
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• v.12 no.6
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• pp.33-46
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• 2012

This research aimed to analyze the way of how flying movement system and background graphic in MMORPG, which provides movement system, influences on users' psychological behavior in order to enhance user's participation and the completion level of 3D game. This research also analyzed the difference between the user's response to the flying movement and other movement structure in game such as things to board, summons, portal, chase, and etc. With this comparative analysis, this study could clarify the characteristics of the user's desire to fly according to the virtual world' topography in game, the necessity of flying movement for fast movement, the dependence of user on flying system, the immersion according to behavior in process of flying, and expression level of virtual world, and etc. The survey through the case research of MMORPG Aion selected for this research showed flying movement system can have suitable quality by applying users' playing time and absorption in flight process, users' impulse following game level, and users' need to fly as a convenience of flying properly.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.43 no.10
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• pp.859-867
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• 2015

This study proposes a robust formation flight control technique of multiple unmanned aerial vehicles(UAVs) using behavior-based decentralized approach. The behavior-based decentralized method has various advantages because it utilizes information of neighboring UAVs only instead of information of whole UAVs in the formation maneuvering. The controllers in this paper are divided into two methods: first one is based on position and velocity of neighboring UAVs, and the other one is based on position of neighboring UAVs and passivity technique. The proposed controllers assure uniformly ultimate boundedness of closed-loops system under time varying bounded disturbances. Numerical simulations are performed to validate the effectiveness of the proposed method.

• The Journal of the Korea Contents Association
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• v.13 no.8
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• pp.152-159
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• 2013

Delinquency young people committed society as evolves is also increasing rapidly. Juvenile delinquency that occurred recently is serious. As a result, young people are feeling fear of delinquency. Fear of delinquency young people feel, a major impact on the personality development of the youth of the period of growth. In particular, the violent delinquency, to give a physical impact, damage youth receives is large. As well as physical damage to people in and around the juvenile victims, given the damage mental serious form, fear violent delinquency has been shown in many previous studies. Therefore, in this study you have the purpose to study the effects on the reaction of juvenile victims for fear of delinquency caused by the delinquency of violence. Set randomly on campus and external experience and damage directly or indirectly, are classified into action evasive action defensive reaction of fear by delinquency, factors that affect the risk caused by violent delinquency, Daegu after conducting a survey of high school students in general in the areas in which we tested the hypothesis. As a result of the verification, exerting a significant influence in order to act defensive becomes clear, experience of direct damage and experience of damage indirect fear of delinquency, avoided experience of direct damage it was found to exert a significant effect on to the action manner.

• Proceedings of the Korean Society of Computer Information Conference
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• 2008.06a
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• pp.63-68
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• 2008

성인 조직범죄집단은 조직유지와 활발한 조직활동을 위해 청소년 비행집단의 구성원을 포섭하려한다. 그리고 청소년 비행집단의 구성원은 다양한 이유로 인하여 조직범죄집단에 유입된다. 이는 당해 비행청소년은 물론 그 주변의 청소년들에게도 악영향을 미친다. 이러한 양 집단 간의 연계를 통한 유입현상을 통제하기 위하여 우선 청소년을 대상으로 비행행위에 대한 예방목적의 프로그램 활용은 물론 보다 효과적인 제도의 운용을 위한 구체적 논의가 필요하다. 이에 대해 청소년들이 활동하고 서로를 접하는 공간인 학교와 지역사회에서의 통제는 필수적이며 이러한 이유로 경찰과의 협력을 통한 예방활동에 주목할 필요가 있다.

• The Journal of Aerospace Industry
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• s.38
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• pp.18-40
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• 1996

• Korean Journal of Family Social Work
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• no.23
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• pp.153-182
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• 2008

This study performed a meta-analysis on 45 research studies conducted in Korea on the relationship between domestic violence experience and juvenile delinquency. The meta-analysis calculated 125 effect sizes. The study then analyzed the effect of exposure to domestic violence on juvenile delinquency and evaluated the relationship according to research variables. The probabilities of juvenile delinquency by children who witnessed domestic violence, experienced violence directly, or experienced child abuse were 14%, 17.8% and 17.2% higher than that of children otherwise, respectively. However, the difference in experience types or child abuse types on mean effect sizes was not statistically significant. Cross effect between the type of domestic violence and the type of juvenile delinquency did not significantly impact the mean effect size of juvenile delinquency. The effect of domestic violence experience on delinquency was highest for junior high students, followed by elementary students and high school students, Difference in the effect size among groups was statistically significant. The effect size with respect to publication year was shown to have a minor static correlation, but the publication type was not meaningful. The study confirmed the effect of domestic violence on juvenile delinquency and emphasized that the responsibility of social environment in juvenile delinquency increase has been overlooked.

• Proceedings of the KIEE Conference
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• 2002.07d
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• pp.2407-2409
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• 2002

강화학습이란 에이전트가 알려지지 않은 미지의 환경에서 행위와 보답을 주고받으며, 임의의 상태에서 가장 적절한 행위를 학습하는 방법이다. 만약 강화학습 중에 에이전트가 과거 문제들을 해결하면서 학습한 환경에 대한 지식을 이용할 수 있는 능력이 있다면 새로운 문제를 빠르게 해결할 수 있다. 이런 문제를 풀기 위한 방법으로 에이전트가 과거에 학습한 여러 문제들에 대한 환경 지식(Domain Knowledge)을 Local state feature라는 기억공간에 학습한 후 행위함수론 학습할 때 지식을 활용하는 방법이 연구되었다. 그러나 기존의 연구들은 주로 2차원 공간에 대한 연구가 진행되어 왔다. 본 논문에서는 환경 지식을 이용한 강화학습 알고리즘을 3차원 공간에 대해서도 수행 할 수 있도록하는 개선된 알고리즘을 제안하였으며, 제안된 알고리즘의 유효성을 검증하기 위해 초소형 비행체의 항공운항 학습에 대해 모의실험을 수행하였다.

• Proceedings of the KSCN Conference
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• 2004.05a
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• pp.401.1-401
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• 2004

우리나라는 음주에 대해 비교적 관대한 정서적 문화를 가지고 있으며, 청소년 음주도 흡연이나 약물 등 다른 비행에 비교해 본다면 상대적으로 경미하다고 판단하는 경향이 있다. 그러나 청소년 음주행위는 건강에 해로운 또 다른 약물과 물질의 오ㆍ남용을 불러오는 길잡이 노릇을 하며, 정서적으로 안정되지 못하고 심리적 갈등이 유발되기 쉬운 청소년기에 흥분이나 거친 행동 등 각종 비행의 원인이 될 수 있을 뿐 아니라, 이 시기에 잘못 길들여진 음주 습관은 일생동안 계속되고, 후에 술로 인한 질병에 걸리거나 알코올 의존자가 되어 일생을 그르칠 가능성이 높다.(중략)