• Journal of the Korea Institute of Information and Communication Engineering
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• v.25 no.3
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• pp.389-395
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• 2021

In this paper, we propose a target image exchange model to improve performance of the object tracking algorithm based on a Siamese network. The object tracking algorithm based on the Siamese network tracks the object by finding the most similar part in the search image using only the target image specified in the first frame of the sequence. Since only the object of the first frame and the search image compare similarity, if tracking fails once, errors accumulate and drift in a part other than the tracked object occurs. Therefore, by designing a CNN(Convolutional Neural Network) based model, we check whether the tracking is progressing well, and the target image exchange timing is defined by using the score output from the Siamese network-based object tracking algorithm. The proposed model is evaluated the performance using the VOT-2018 dataset, and finally achieved an accuracy of 0.611 and a robustness of 22.816.

• Asia-pacific Journal of Multimedia Services Convergent with Art, Humanities, and Sociology
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• v.6 no.5
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• pp.173-185
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• 2016

As a dual-degree program/exchange student program becomes widespread, the faculty and students consisting of a course are being globalized. Recently, there has been an online or blended learning-based course, which is evolved from a conventional offline course. However, the course has no consideration of a dual-degree program or exchange student program because it is limited to a domestic university. To create and manage a global course, there have several of difficulties in the aspects of cost or effectiveness. As a solution to tackle them, it is necessary to do research on providing blended global courses with a fusion approach of online and offline. In this paper, we studied and presented a model of blended global courses. To create and maintain overseas scholar-oriented courses, we devised eight types of blended global courses depedning on their opening time and the cooperative relation between online and offline and made their comparative analysis. The blended global course proposed in this paper can be applied to cultivating global human resources in universities.

• Journal of Korean Society of Coastal and Ocean Engineers
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• v.18 no.3
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• pp.211-224
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• 2006

It was analysed that spatial and temporal change patterns of COD, TN and TP were measured monthly from 2002 to 2005 in Jumunjin Harbour. Cenerally, concentration of upper layer higher than lower layer, concentration difference of COD, TN and TP on upper lower layer at inner zone in Jumunjin Harbour higher than sea area front of breakwater. Seasonal change width of COD concentration different, but seasonal change pattern of COD, $NH_{4}-N$ and TN clearly showed. Water quality improvement effect of seawater exchange facilities and sewage treatment plants is analysed quantitatively using averaged spatial and temporal data set. Change of COD small at 2003, concentration reduced about $34{\sim}47%$ at all zones on 2004 and 2005. TN was influenced largely effect of seawater exchange facilities. Concentration reduction at zone 1, 2, 3 estimated about $60{\sim}70%,\;40{\sim}60%,\;40%$, respectively. As a consequence, concentration reduction of COD and TN that is, effect of water quality improvement influenced seawater exchange facilities appeared not only at inner zone, also sea area front of breakwater and entrance of Jumunjin Harbour.

• Proceedings of the Korea Multimedia Society Conference
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• 1998.10a
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• pp.26-30
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• 1998

공장자동화 분야의 응용프로그램은 일반적으로 구동부(Control Part)와 GUI(Graphical User Interface)부로 구성된다. 구동부와 GUI부 사이에는 해당 프로그램이 작동되는 컴퓨터 시스템들이 있으며 이들 시스템 시기에는 적절한 프로토콜에 따른 자료교환이 발생한다. 통신기법 중 자동화 시스템에서 사용되는 RS232C는 직렬 통신기법으로서 자료 손실로 인하여 전체 시스템의 안정성 및 효율성이 저할 될 수 있다. 본 논문에서는 이러한 자료손실을 줄일 수 있는 통신 프로그램을 구현함으로써 공장자동화의 안정 성 및 효율성을 증대시킬 수 있는 방법을 제시하고자 한다. 사용된 방법은 자료손실을 막기 위하여 자료 수신부와 자료 처리부를 분리하고 수신 측은 메시지 인터럽트 방식을 사용하고 자료 처리부는 타이머 방식을 적용시켰다. 또한, 자료 순환 대기행렬을 구성하여 타이머가 주기적으로 자료를 검색하여 처리하게 함으로써 처리시간을 고려하지 않아도 자료손실을 막을 수 있도록 하였다.

• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.493-494
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• 2015

전원설비 투자계획은 주어진 기간 하에서 최적 발전기 투입용량 및 시기를 결정하는 문제이다. 전원설비의 준공일정은 다양한 사회적 요인의 영향으로 불확실성에 노출되어 있다. 본 논문에서는 전원설비 준공 불확실성을 고려한 전원설비 계획 문제를 제시한다. 발전설비의 준공지연 불확실성은 이산 확률론적 밀도함수를 갖는 확률변수로 표현된다. 최적화 문제에서 확률변수를 고려하기 위해 2단계 확률론적 계획법이 도입된다. 주문제-부문제로 분해된 최적화 문제는 쌍대함수 정보를 교환하는 반복연산을 수행하여 최적 전역해에 도달할 수 있다.

• Journal of Korean Society for Quality Management
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• v.19 no.2
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• pp.117-124
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• 1991

In this paper, it is assumed that a system is composed of an essential unit and a nonessential unit. During the running of the system, an essential unit is replaced at periodic replacement time T or at nth failure of essential unit whichever occurs first. Nonessential unit is replaced at its failure and at the replacement of essential unit. This paper derive optimal replacement period which minmises the total expected cost for replacement. The unimodality of totoal maintenance cost function is proved under the assumption that hazard rate of each component is continuous and monotone increasing failure rate(IFR). Based on this condition, it is shown that the optimal replacement period is finite and unique.

• Speech Sciences
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• v.8 no.4
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• pp.157-168
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• 2001

The limited capacity model has been used to explain linguistic interactions and trade-offs that occur in children's speech. The purpose of the present investigation is to explore the interrelationship of MLU (as an index of syntactic development) and fluency in the spontaneous speech of normal children. Twenty normal children's (ten girls and ten boys, aged 36-48 months) spontaneous speech samples were obtained during free-play interactions with their mothers or other adults. The results indicated that the MLU of disfluent utterances were significantly longer than that of fluent utterances. Also, disfluencies occurred more frequently in longer utterances than in shorter utterances. In addition, the utterances where disfluencies occurred more than 2 times were longer than those where disfluencies occurred once. These results imply that the increase of MLU appear to affect not only the occurrence of disfluent utterances, but also the number of disfluencies within the utterances. In other' words, these findings show that there are trade-off effects between MLU and fluency. This is discussed within a limited capacity framework.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2018.11a
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• pp.92-94
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• 2018

항로표지 관리운영시스템은 항로표지 상태정보 및 해양기상정보의 감시제어 및 정보 제공 등을 위하여 지방청별로 설치 시기 및 용역사에 따라 다양하게 개발되어 운영하고 있다. 항로표지 관리운영시스템을 도입한 지방청들은 표준화되지 않은 관리운영 S/W 및 데이터 베이스를 현장 상황에 맞게 변경하여 각 지방청별로 관리운영 S/W의 유지보수 예산의 중복투자 및 관리자의 관리 운영측면에서 어려움이 있다. IALA(국제항로표지협회)는 해사 안전 분야 데이터 교환 국제표준인 S-100에 따른 항로표지 정보 표준인 S-201 규격의 개발이 진행중이다. 이에 e-Navigation 도입을 대비하여 고도화된 항로표지 정보의 체계적이고 원활한 제공을 위해 S-201을 적용한 일원화된 항로표지 관리운영시스템의 표준 S/W 개발이 필요하다. 본 연구에서는 S-201을 적용한 DB 구조를 설계하였으며, 사용자 편의성 및 시스템 관리 효율성을 개선한 새로운 항로표지 관리운영시스템 S/W를 개발하고 있다.

• Electronics and Telecommunications Trends
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• v.16 no.4 s.70
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• pp.67-76
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• 2001

본 논문은 ACE2000 시스템 소프트웨어의 Release 시점을 예측할 수 있는 최적 배포문제로, 시스템의 안정도를 평가해 볼 수 있는 측면에서 소프트웨어 최적 배포문제에 대해 살펴보고 평가기준을 제시하여 제품의 적기 공급 및 개발자원의 효율적 이용 측면을 분석한다. 즉, 신뢰성 평가척도와 개발 비용을 고려한 최적 배포문제를 기술하였다. 또 여러 가지 소프트웨어 신뢰도 성장모델 중 지수형 모델을 근거로 한 소프트웨어 개발비용과 신뢰성 평가기준을 고려한 배포시기를 결정하여 보았다.

• The Transactions of the Korea Information Processing Society
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• v.6 no.3
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• pp.615-621
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• 1999

On the aspect of on-time and development resource use, it is very important to predict the software release time during the software development process. In this paper, we present the optimal release problem based on the evaluation indicator and cost evaluation. And also we show the optimal release point considered with both of them. We applied the Exponential Software Reliability Growth Model(E-SRGM) and Testing-effort dependent Software Reliability Growth Model(Te-SRGM) and decided the software release time according to software reliability indicator. As a result of two models comparison, we verify the Te-SRGM is more adopted in our switching system software.