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이재구(Jaegu Lee),심인보(Inbo Shim),윤중선(Joongsun Yoon) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.4
Researchers have utilized artificial evolution techniques and learning techniques for studying the<br/> interactions between learning and evolution. Adaptation in dynamic environments gains a significant<br/> advantage by combining evolution and learning. We propose an on-line, realtime evolutionary learning<br/> mechanism to determine the structure and the synaptic weights of a neural network controller for mobile robot<br/> navigations. We support our method, based on (1+1) evolutionary strategy which produces changes during the<br/> lifetime of an individual to increase the adaptability of the individual itself, with a set of experiments on<br/> evolutionary neural controller for physical robots behaviors. We investigate the effects of learning in<br/> evolutionary process by comparing the performance of the proposed realtime evolutionary learning method<br/> with that of evolutionary method only. Also, we investigate an interactive evolutionary algorithm to overcome<br/> the difficulties in evaluating complicated tasks.
동강국제사진제의 지역화, 차별화 전략과 실행 분석을 통한 활성화 방안
이재구 ( Lee Jaegu ) 한국사진학회 2017 AURA Vol.0 No.39
The study analyzes the current state of Dong Gang International Photo Festival, which is renowned for Dong Gang Photo Village, the home of photography to all over the world and the differentiating strategies employed by the members of the committee of Dong Gang International Photo Festival to have get started in the Yeongwol city ever sine 2002. More importantly, to propose the viable strategy, what is called 'Globality or Globalization' making it possible to get into the world of the Photo Festival more efficiently. Also, Dong Gang International Photo Festival attempted to strategically differenciate itself from other festivals through such means as 'Localization' and 'Specialization'. which has constituted ever since 2006. To enhance the further development of Dong Gang International Photo Festival within the competitive situation will require additional emphasis onf what differentiate it from other convocations, namely its unique statue as the most prestigious, equipped by localization and specialization strategies, Dong Gang Photo Festival in Korea making an effort to gain and promote the fame for the world-famous photo festival across national frontiers.
장애아동 부모의 양육스트레스가 양육효능감에 미치는 영향: 양육지식의 조절효과 연구
이재구 ( Jaegu Lee ) 인문사회 21 2023 인문사회 21 Vol.14 No.1
연구 목적: 본 연구는 장애아동을 가진 부모의 양육스트레스가 양육효능감에 미치는 영향과 양육지식의 조절효과를 규명하여 이를 통해 실무적으로 바람직한 양육스트레스의 감소와 양육행동의 설정에 본 연구의 목적이 있다. 연구 방법: 본 연구는 서울, 경기 지역에서 장애통합반을 운영하고 있는 어린이집 및 장애복지관 치료실을 이용하는 만 10세 미만의 장애아 부모 376명을 대상으로 분석을 실시하였다. 연구 내용: 첫째, 장애아동 부모의 양육스트레스 중 부모의 고통과 역기능적 상호작용, 까다로운 아동 하위변인은 모두 양육효능감의 부모역할 자신감, 부모역할 어려움에 유의한 직접적인 영향을 미치는 것으로 나타났다. 둘째, 장애아동 부모의 양육스트레스와 양육효능감과의 관계에서 양육지식은 유의한 조절효과가 있는 것으로 나타났다. 결론 및 제언: 본 연구의 결과를 통해 장애아동의 성장 및 발달, 부모와 가족이 행복한 삶을 영위하기 위한 일환으로 가족복지실천현장에서는 장애아동 부모의 양육스트레스를 경감시키고 양육효능감을 증가시키기 위한 지속적, 다각적인 방안이 모색되어야 할 필요성이 제기되었다. The purpose of this study is to examine the impact of the parenting stress of the parents of children with a disability on their parenting self-efficacy and the moderating effect of parenting knowledge, with a view to setting the desirable strategies for reducing parenting stress and setting parenting behaviors. For this study, 376 parents of children with a disability under 10 that are using the daycare centers with General Disability Classes and Disability Welfare Centers located in Seoul and Gyeonggi regions were analyzed. The findings from this study were as follows. First, of the parenting stress of the children with a disability, the pain of parenting, negative interactions, and difficulties in transportation, which were sub-factors, all had a significant and direct impact on the confidence in parenting and difficulties in parenting, which were sub-factors of parenting self-efficacy. Second, in the relationship between the parenting stress of the parents of children with a disability and parenting self-efficacy, parenting knowledge had a significant moderating effect. The findings of this study suggested the need for developing sustained and multi-faceted strategies to enhance parenting self-efficacy and reduce parenting stress of the parents of children with a disability in family care so as to assist the development and growth of the children with a disability and ensure that their family and parents enjoy a happy life.
대형 자동차 하이브리드 구동 시스템의 회로구성과 특성해석에 관한 연구
이재구(Jaegu Lee),최득환(Dookhwan Choi),한문식(Moonsik Han) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
An accumulator in hydraulic systems stores kinetic energy during braking action, and then that controls hasty surge pressure. An energy recovery system using accumulator seems to be advantageous for ERBS due to its high energy density. This study suggests a method to decide suitable accumulator volume for ERBS. The method is based upon energy conservation between kinetic energy of moving inertia and elastic energy of accumulator. The energy conversion was analyzed and a simple formula was derived. Also accumulator tests have been conducted for<br/> different load mass and motor speed. A series of test work is carried out in the laboratory and the dynamic characteristics of the hydraulic motor system, such as the surge pressure and response time. are investigated in both brake action and acceleration action and these results show that the proposed design is effective for decision accumulator volume in ERBS.<br/>
이재규(Jaekyu Lee),이재구(Jaegu Lee),이재천(Jaecheon Lee),김대철(Daecheol Kim) 한국자동차공학회 2005 한국자동차공학회 지부 학술대회 논문집 Vol.- No.-
The purpose of this paper is to find the pressure characteristics of a powershift hydraulic transmission system when we shifted the clutch and deal with basic concept of HILS for a powershift hydraulic transmission. that has many nonlinearities because of P-Q diagram and saturation of control. So, actural test is needed when new component or control algorithm is developed but many restrictions will demand. The AMESim and LabVIEW models of hydraulic components in the HILS were used to test and analyze the dynamic characteristics of the powershift hydraulic transmission system, such as the surge pressure and response time. According to experiment results, pressure interface phenomenon results in system unstability and clutch abrasion happened by clutch sliding.