• 전자공학회논문지A
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• 제29A권8호
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• pp.99-109
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• 1992

First, the coupling faults of semiconductor memory are classified in detail. The chained coupling fault is introduced and defined, which results from sequential influencing of the coupling effects among memory cells, and its mapping relation is described. The linked coupling fault and its order are defined. Second, the deterministic “Algorithm GA” is proposed, which detects stuack-at faults, transition faults, address decoder faults, unlinked 2-coupling faults, and unlinked chained coupling faults. The time complexity and the fault coverage are improved in this algorithm. Third, it is proved that the march test of an address sequence can detect 97.796% of the linked 2-coupling faults with order 2. The deterministic “Algorithm NA” proposed can detect to the limit. The time complexity and the fault coverage are improved in this algorithm.

• 말소리와 음성과학
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• 제8권3호
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• pp.31-38
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• 2016

Speech inversion (acoustic-to-articulatory mapping) is not a trivial problem, despite the importance, due to the highly non-linear and non-unique nature. This study aimed to investigate the performance of Deep Neural Network (DNN) compared to that of traditional Artificial Neural Network (ANN) to address the problem. The Wisconsin X-ray Microbeam Database was employed and the acoustic signal and articulatory pellet information were the input and output in the models. Results showed that the performance of ANN deteriorated as the number of hidden layers increased. In contrast, DNN showed lower and more stable RMS even up to 10 deep hidden layers, suggesting that DNN is capable of learning acoustic-articulatory inversion mapping more efficiently than ANN.

• 한국멀티미디어학회논문지
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• 제11권8호
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• pp.1138-1145
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• 2008

최근에 다양한 분야에서 캐릭터 표정을 생성하는데 연기자 기반 표정 캡쳐 방법을 널리 사용하고 있다. 특히, 방송이나 게임 등의 분야에서는 실시간 요소와 연기자와 외형상의 차이가 큰 캐릭터의 경우에도 표정 표현이 가능한 다양성이 중요한 문제가 된다. 본 논문에서는 연기자 얼굴에서 캡쳐한 표정을 다양한 얼굴 모델에 적용하는 새로운 표정 애니메이션 방법을 제안한다. 이 방법을 사용하면 최소의 실시간 비용으로 캐릭터 표정을 생성하고 제어하는 것이 가능하다. 본 논문에서는 세 가지 핵심 이슈로서 얼굴 표정 캡쳐, 표정 대입, 표정 애니메이션을 다룬다. 그리고 연기자와 얼굴 모델 간의 특성이 매우 상이한 다양한 경우에 대하여 실험결과를 보여줌으로써 접근방식의 유효성을 증명한다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권2호
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• pp.1019-1031
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• 2017

In this study, we propose a new method for simulating water responding to human motion. Motion data obtained from motion-capture devices are represented as a jointed skeleton, which interacts with the velocity field in the water simulation. To integrate the motion data into the water simulation space, it is necessary to establish a mapping relationship between two fields with different properties. However, there can be severe numerical instability if the mapping breaks down, with the realism of the human-water interaction being adversely affected. To address this problem, our method extends the joint velocity mapped to each grid point to neighboring nodes. We refine these extended velocities to enable increased robustness in the water solver. Our experimental results demonstrate that water animation can be made to respond to human motions such as walking and jumping.

• 한국정보통신설비학회:학술대회논문집
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• 한국정보통신설비학회 2005년도 하계학술대회
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• pp.10-15
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• 2005

In the area of mobile communication, Location Based Services (LBS) using the location of mobile terminal to provide their services are rapidly spreading as communication network and terminal evolves. Despite the LBS are highly demanded in high speed internet area, the services are very rare due to the difficulty locating terminals. In this paper, we propose the method to locate terminals in real time and describe its implementation system. The proposed system is designed to collect the information in real time for more than a terminal connecting internet. And, the system shows high performancecollecting and generating location information through simulation tests.

• ETRI Journal
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• 제38권3호
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• pp.518-528
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• 2016

The searching of an extensive document database for documents that are locally similar to a given query document, and the subsequent detection of similar regions between such documents, is considered as an essential task in the fields of information retrieval and data management. In this paper, we present a framework for such a task. The proposed framework employs the method of short-read mapping, which is used in bioinformatics to reveal similarities between genomic sequences. In this paper, documents are considered biological objects; consequently, edit operations between locally similar documents are viewed as an evolutionary process. Accordingly, we are able to apply the method of evolution tracing in the detection of similar regions between documents. In addition, we propose heuristic methods to address issues associated with the different stages of the proposed framework, for example, a frequency-based fragment ordering method and a locality-aware interval aggregation method. Extensive experiments covering various scenarios related to the search of an extensive document database for documents that are locally similar to a given query document are considered, and the results indicate that the proposed framework outperforms existing methods.

• 정보처리학회논문지D
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• 제17D권1호
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• pp.59-66
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• 2010

기존의 OCR 엔진은 보정된 환경에서 읽혀진 서류 영상에 맞게 설계되어있다. 스마트 폰을 비롯한 검정 화면 거리가 보정되지 않은 기기에서 읽혀진 영상에서는 삼차원 원근 투시에 의한 찌그러짐 또는 곡면상에서의 찌그러짐 등이 핵심적인 문제점들로 여겨진다. 휴대용 단말기에서 읽혀진 영상들에서의 OCR 기능에 대한 요구가 증가일로에 있는 시점에서, 본 논문에서는 문제점들을 세 가지로 구분하고 - 회전에 무관한 문자 영역 추출, 폰트 등의 크기에 무관한 문자 선 영역 추출, 3차원 매핑 이론 - 이를 해결하기위한 방법을 제시하였다. 이러한 방법론을 통합하여 카메라 영상 위에서의 OCR을 개발하였다.

• International Journal of Internet, Broadcasting and Communication
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• 제16권1호
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• pp.140-147
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• 2024

In Current artificial structures, we must periodically make their safety inspections. In this process, we should consider the safety of workers and the accuracy of safety checks and also consider time and cost savings for safety inspections. Additionally, in the fields of architecture and civil engineering, we are unavoidable the use of foreign commercialized BIM model tools. To address these challenges, we propose mapping crack areas and BIM 3D design drawings based on augmented reality (AR) for the safety inspection of Huge Bridges. For this purpose, we define indexing of 2D/3D drawing models, create the tabulation of all 2D/3D drawings into a database, analyze QR codes, and finally integrate with augmented reality devices. we may expect our method to improve the efficiency of safety inspections on bridge sites. Moreover, we will enable the domestics of our pure technology.

• 한국인터넷방송통신학회논문지
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• 제11권6호
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• pp.73-80
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• 2011

본 논문에서는 인터넷공유기 내부의 사설IP주소가 설정된 인터넷 전화단말을 효율적으로 관리하고 제어하기 위한 인터넷 전화단말 원격관리시스템을 설계 및 개발하였다. 개발시스템의 동작은 관리시스템에서 원격에 있는 공유기내부의 인터넷 전화단말로 SMS메시지를 보내서 그것으로 인하여 전화단말에서 망 관리 프로토콜인 SNMP Trap 메세지를 발생토록 하여 UDP세션을 생성시키고, 이 생성된 UDP hole을 통하여 인터넷 전화단말의 각종 관리정보를 수집하게 하였다. 개발시스템의 성능을 실험실 환경의 시험네트워크를 구축하여 시험한 결과, 관리시스템에서 인터넷 전화단말로 관리정보 수집을 위한 접속이 원활히 이루어지고, 인터넷 전화단말의 각종 관리정보가 정상적으로 수집되고 관리됨을 확인할 수 있었다. 개발시스템은 향후 인터넷 전화단말의 효율적인 관리와 서비스품질 향상에 기여할 것으로 기대된다.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2006년도 6th International Meeting on Information Display
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• pp.1660-1665
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• 2006

Drop placement accuracy and precision are the critical performance values of industrial ink jet deposition systems. Imperfect components and environments have severe impacts on drop placement. Litrex has identified over 120 error sources and developed engineering solutions to address the errors. In this paper, improved results using thermal compensation and stage mapping techniques are demonstrated. A recent progress in inkjet fabrication of multi-color electrophoretic display on flexible substrate with large distortion is also demonstrated.