• 인터넷정보학회논문지
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• 제14권4호
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• pp.53-62
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• 2013

클라우드 로봇에서, 효율적인 정보공유 모델은 연구과제이다. 본 논문에서는 클라우드 기반 로봇들이 서로 연동하고 지식을 공유하기 위한 지식공유 모델을 제시한다. 효율적인 메시지 전송을 위해 멀티 에이전트 기반 적응형 그룹 통신을 제시하며, 연결(link) 노드는 주요 링크를 결정하기 위한 비중함수를 사용한다. 성능평가 결과, 제시한 알고리즘이 최소 메세지 오버헤드를 나타내었으며, 전통적인 그룹통신 방법에 비해 주요 링크를 사용함으로 인해 질의에 대한 응답이 빠름을 보였다.

• 대한가정학회지
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• 제38권2호
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• pp.41-56
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• 2000

This study focused on the effects of family, individual characteristics of adolescents and coping behaviors on adolescent runaway. The major findings were as follows: 1. Adolescent who had higher level of family violence, lower level of communication with parent, family cohesion and adaptability, and resource adequacy perception reported higher scores in runaway. 2. Adolescents who had higher level of emotional distress, lower level of self-esteem and self-control tended to have higher scores in runaway. 3. There was a significant difference in adolescent runaway according to coping behavior styles. 4. Maladaptive coping behaviors were significantly associated with the runaway adolescent group. 5. Adaptive coping behaviors were not associated with both runaways and non-runaways group. 6. Communication with father had a direct effect on adolescent runaway and also indirect effects through emotional stress and maladaptive coping behavior. 7. Maladaptive coping behaviors had a direct effect on adolescent runaway but adaptive coping behavior had no effect. 8. Emotional stress had an indirect effect through maladaptive coping behavior on adolescent runaway. 9. Communication with father had a direct effect and an indirect effect through self-esteem of adolescents on the adaptive coping behavior. 10. Family adaptability had a direct effect on the adaptive coping behavior.

• 한국융합학회논문지
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• 제11권9호
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• pp.181-191
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• 2020

본 연구의 목적은 비장애(non-disabled) 유아에서 선별된 감각처리문제군의 적응행동과 내재화/외현화 증상 관련 부적응행동을 대조군과 비교하고 감각처리가 적응/부적응행동에 미치는 영향력을 확인하는 것이다. 3-6세 어린이집에 재원하는 비장애 유아에게 단축감각프로파일과 바인랜드 2판을 실시하였고 최종 335명을 연구대상으로 하여 Pearson 상관, t-test, 다중회귀분석을 실시하였다. 연구 결과 감각처리는 적응행동과 유의한 정적 상관관계를, 부적응 행동과 유의한 부적 상관관계를 나타냈고, 부적응행동의 상관계수 범위가 적응행동 상관계수 범위에 비해 높았다. t-test 결과 감각처리문제군은 대조군에 비해 적응행동의 의사소통 및 사회성 관련 영역에서 유의하게 평균이 낮았고, 부적응행동의 모든 영역에서는 유의하게 평균이 높았다. 감각처리 하위요인이 적응/부적응행동에 미치는 영향에서 유의한 설명력이 확인되었다. 비장애 유아에서도 발생하는 비정형 감각처리는 적응행동에도 영향을 미치지만 내재화/외현화 증상 관련 부적응행동에 좀 더 많은 영향을 미치는 것으로 확인되었다.

• 산업공학
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• 제16권spc호
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• pp.28-32
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• 2003

In this paper, the fuzzy group method data handling-type(GMDH) neural networks and their application to the forecasting of mobile communication system are described. At present, GMDH family of modeling algorithms discovers the structure of empirical models and it gives only the way to get the most accurate identification and demand forecasts in case of noised and short input sampling. In distinction to neural networks, the results are explicit mathematical models, obtained in a relative short time. In this paper, an adaptive learning network is proposed as a kind of neuro-fuzzy GMDH. The proposed method can be reinterpreted as a multi-stage fuzzy decision rule which is called as the neuro-fuzzy GMDH. The GMDH-type neural networks have several advantages compared with conventional multi-layered GMDH models. Therefore, many types of nonlinear systems can be automatically modeled by using the neuro-fuzzy GMDH. The computer program is developed and successful applications are shown in the field of estimating problem of mobile communication with the number of factors considered.

• Journal of the Korean Data and Information Science Society
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• 제24권2호
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• pp.289-301
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• 2013

본 연구는 '광고 다이얼 (ad dial)'이라는 도구를 통하여 얻어진 함수 자료에 대한 독립 이표본 검정에 관련한 사례연구이다. 본 연구에서는 2008년 미국대선에 출마한 오바마 대통령 후보의 TV광고를 실험참여자의 정치성향 (민주당/공화당/무당파)별로 오바마 후보의 피부색을 달리한 두 광고 형태의 다이얼 점수에 차이가 있는지를 검정한다. 특히 시간상관관계 (serial correlation)가 존재하는 함수자료의 분석을 위하여 이산 푸리에 변환에 기반한 '적응-네이만-검정 (adaptive Neyman test)'을 적용하여 광고형태별 차이에 대한 통계적 유의성을 검정하였고 오직 무당파 실험군에서 유의한 차이가 있음을 발견하였다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제15권9호
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• pp.3348-3364
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• 2021

Magic matrix-based data hiding schemes are applied to transmit secret information through open communication channels safely. With the development of various magic matrices, some higher dimensional magic matrices are proposed for improving the security level. However, with the limitation of computing resource and the requirement of real time processing, these higher dimensional magic matrix-based methods are not advantageous. Hence, a kind of data hiding scheme based on a single or a group of multi-dimensional flexible magic matrices is proposed in this paper, whose magic matrix can be expanded to higher dimensional ones with less computing resource. Furthermore, an adaptive mechanism is proposed to reduce the embedding distortion. Adapting to the secret data, the magic matrix with least distortion is chosen to embed the data and a marker bit is exploited to record the choice. Experimental results confirm that the proposed scheme hides data with high security and a better visual quality.

• 한국게임학회 논문지
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• 제21권1호
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• pp.113-124
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• 2021

이 연구는 중학생의 게임 선용과 게임 과몰입을 동시에 고려해 게임이용집단을 구분하고, 집단별로 자기통제력과 또래 지지, 게임이용량의 차이를 분석하였다. 이를 위해 한국콘텐츠진흥원의 게임이용자 패널조사(5차년도)의 중학생 데이터(287명)를 2차 분석하였으며, 그 결과는 다음과 같다. 첫째, 군집 분석을 통해 중학생의 게임이용집단을 '고병존', '선용', '일반'으로 구분하였다. 둘째, 집단별로 자기통제력, 또래 지지, 게임이용량의 차이를 보였다. 구체적으로, '고병존' 집단은 '선용' 집단과 '일반' 집단보다 낮은 자기통제력을 보였고, 게임이용량도 가장 많았다. 또한, '일반' 집단은 또래 지지 정도가 가장 높았다.

• 한국통신학회:학술대회논문집
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• 한국통신학회 2004년도 추계종합학술대회 논문 초록집
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• pp.244-244
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• 2004

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권4호
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• pp.1889-1910
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• 2017

This paper investigates a protocol so-called Adaptive Harvest Then Transmit (AHTT) for wireless powered communication networks (WPCNs) in multiple-input single-output (MISO) downlink systems, which assists in transmitting signals from a multi-antenna transmitter to a single-antenna receiver. Particularly, the power constrained relay is supplied with power by utilizing radio frequency (RF) signals from the source. In order to take advantage of multiple antennas, two different linear processing schemes, including Maximum Ratio Combining (MRC) and Selection Combination (SC) are studied. The system outage capacity and ergodic capacity are evaluated for performance analysis. Furthermore, the optimal power allocation is also considered. Our numerical and simulation results prove that the implementation of multiple antennas helps boost the energy harvesting capability. Therefore, this paper puts forward a new way to the energy efficiency (EE) enhancement, which contributes to better system performance.

• 아동학회지
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• 제32권4호
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• pp.185-202
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• 2011

The purpose of this study was to examine the effects of the Seesaw & Swing Early Intervention Program on the positive changes of young children from low-income families. The Seesaw & Swing program was developed by the Community Chest of Korea (Hwang et al., 2009). The subjects for this study consisted of 534 3~6-year olds (177 in the service group, 357 in the control group) from low-income families. The instrument used was the Vineland Adaptive Behavior Scales, second edition (Sparrow, Cicchetti, & Balla, 2005). The results of this study indicated that the Seesaw & Swing intervention program produced positive effects in all of the domain areas under examination : namely, the communication abilities, life skills, socialization, physical development, and adaptive behaviors of young children. In conclusion, the Seesaw & Swing Early Intervention Program for young children from low-income families can be said to be an effective early intervention program which goes some way towards ending the intergenerational transition of poverty in Korea.