• Journal of information and communication convergence engineering
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• 제6권1호
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• pp.86-90
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• 2008

In this paper, I have presented a new approach which can track moving objects in unknown environments. This scheme is important in providing a computationally feasible alternative to complete enumeration of JPDA which is intractable. I have proved that given an artificial measurement and track's configuration, proposed scheme converges to a proper plot in a finite number of iterations. In this light, even if the performance is enhanced by using the relaxation, we also note that the difficulty in tuning the parameters of the relaxation scheme is critical aspect of this suggestion.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2004년도 ICCAS
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• pp.1634-1637
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• 2004

We developed a communication device for person with serious disability to use slight movement. This device is developed mainly for patients suffering from ALS or a cerebral infarction. They often have communication difficulty because of deterioration of muscle functions. A feature of this device is that slight movements of user's finger, eyes or lips can be detected by using a vision sensor. Due to the features of the vision sensor, it is quite easy even for person with serious disability to use a communication device. By the field test it is confirmed that the vision sensors have superior performances as an input device for communication device. Experiments to use an EMG (electromyography) sensor and a rotary sensor are also tested to compare the performances.

• 한국전자통신학회논문지
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• 제2권1호
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• pp.34-39
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• 2007

해저광케이블은 대양을 횡단하는 국제통신의 대부분을 처리하고 있는 중요한 정보통신 전달매체이다. 하지만 이러한 해저광케이블 고장 발생시 막대한 수리 비용은 물론, 국제적 국가 신뢰도 추락, 통신 소통의 두절로 많은 어려움과 손실을 초래한다. 따라서, 본 논문에서는 해저케이블 안정성을 위한 방안을 도출하고자 국내외 해저광케이블 현황 및 고장원인을 분석한 후 고장 예방을 위한 기법과 해저시설 사용자간 보호 규정 마련을 제시하고자 한다.

• 영어어문교육
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• 제11권3호
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• pp.1-23
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• 2005

This paper is a qualitative and quantitative study. The main purpose of the paper is to diagnose what makes English communication difficult at the Korean EFL adult level. In order to obtain data, this study employed interviews and a questionnaire. We identified thirty three factors blocking pathways to oral communication. Qualitative analysis repeatedly revealed patterns such as lack of grammar, lack of vocabulary, lack of background knowledge, and peer pressure, but quantitative analysis yielded somewhat different results: lack of colloquial expressions, lack of vocabulary, lack of various topics, problems in the educational system, difficulty in using existing knowledge, and lack of grammar. Findings which were common to both qualitative and quantitative analyses suggest that lack of linguistic knowledge and lack of background knowledge are major barriers learners encounter in communication. On the basis of the results, suggestions are made for overcoming these barriers.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 1997년도 Proceedings International Workshop on New Video Media Technology
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• pp.89-94
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• 1997

In this paper, we present a VR-based interface method which provides users more natural, realistic, and interactive communication and collaboration tool. Since most services in the communication systems matches with the services in the real world, the best understanding would be achieved when the communication services are represented in accordance with the services in the real world. However, conventional text-based interface and 2D GUI cannot provide such reality to the users. In this paper, we discuss VR-based interface to overcome such difficulty and introduce one instance of communication system using the VR-based realistic, what we call Virtual Village, which we are currently developing. This application might be applied to education in virtual space, desktop conferencing system, and entertainment such as MUD or the games in the distributed environment, etc.

• 한국인터넷방송통신학회논문지
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• 제19권6호
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• pp.219-225
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• 2019

한자 급수와 같이 기존 한자 난이도 선정 방식에 문제점이 있다. 실생활에서 쓰이는 한글 단어와 차이가 나며 해당 급수가 실제로 얼마나 많이 쓰이는지 알 수가 없다. 이러한 문제를 해결하기 위해 빈도수를 이용하여 다중 회귀 분석을 이용하여 한자 난이도를 측정한다. 초등 교과서를 기반으로 한자활용빈도수와 한글의미빈도수를 집계한다. 두 빈도수와 획수를 함께 사용하여 설문지를 작성하여 해당 한자의 학습 적정 시기를 답변 받아 이를 회귀에서 사용할 타겟 변수로 이용한다. 단계별 회귀분석을 이용하여 적절한 피처를 선택하고 다중 선형 회귀 분석을 한다. 모델의 R²는 0.1105가 나왔으며 RMSE는 0.1105의 결과가 나왔다.

• 정보학연구
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• 제6권4호
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• pp.59-68
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• 2003

본 논문에서는 컴퓨터 통신 네트워크의 정보보호를 위해 다항식의 인수분해의 어려움이 있는 공개키 다항식 배낭 암호시스템과 공개키 다항식 지수 암호시스템을 제안하였다. 먼저, 제안된 공개키 다항식 배낭 암호시스템에서 공개키는 2개의 다항식 B(x,y,z)와 f(x,y,z)로 하고, 비밀키는 초증가성 벡터로 한다. 암호문의 해독은 f(x,y,z)=0의 근, 그리고 비밀키 벡터의 초증가성을 사용하여 평문이 구해진다. 여기서 3변수 다항식 f(x,y,z)=0의 인수분해의 어려움 때문에 안전성을 갖는 암호시스템으로 된다. 또한 제안된 공개키 다항식 지수 암호시스템에서는 소인수분해의 어려움에 기초를 둔 기존 방법의 안전성에, 2개의 다항식 f(x,y,z)=g(x,y,z)=0을 인수분해 하여 동시에 만족하는 근을 구하는 어려움을 더함으로써 보다 더 안전성 있는 공개키 암호시스템으로 된다. 제안된 공개키 다항식 암호시스템의 타당성을 컴퓨터 시뮬레이션을 통하여 입증하였다.

• 한국인터넷방송통신학회논문지
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• 제18권6호
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• pp.259-268
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• 2018

본 연구의 목적은 인지기능 훈련 콘텐츠들을 사용하는 동안 사용자들의 흥미와 몰입도를 높이기 위하여 인지 능력 수준에 맞춘 훈련 방법을 제시하는 것이다. 사용자의 인지 능력 수준은 K-means 알고리즘을 적용한 협업 필터링을 사용하여 사용자들의 정보와 한국형 아동 간이 정신 상태 검사 점수를 기반으로 군집화한 결과를 바탕으로 이루어졌다. 이 결과를 구현된 인지기능 훈련 통합 시스템에 적용하여 사용자의 인지 능력 수준에 알맞은 인지기능 훈련 영역 별 콘텐츠 순서와 난이도를 추천하였다. 특히 콘텐츠 난이도 조절은 사용자들이 긴장감과 편안함을 반복적으로 느낄 수 있도록 제안한 '몰입이론' 방법을 적용하여 높은 몰입감을 주고자 하였다. 결론적으로 본 논문에서 제안한 사용자 맞춤형 인지기능 훈련 방법은 기존의 치료사가 콘텐츠 순서와 난이도를 주관적으로 설정하는 것보다 더욱 효과적이고 재활 결과를 기대할 수 있을 것이다.

• International Journal of Internet, Broadcasting and Communication
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• 제13권2호
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• pp.67-75
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• 2021

As pass the three revised bills, the Personal Information Protection Act was revised to have a larger application for personal information. For an industrial development through an efficient and secure usage of personal information, there is a need to revise the existing anonymity processing method. This paper modifies the Zero Knowledge Proofs algorithm among the anonymity processing methods to modify the anonymity process calculations by taking into account the reliability of the used service company. More detail, the formula of ZKP (Zero Knowledge Proof) used by ZK-SNAKE is used to modify the personal information for pseudonymization processing. The core function of the proposed algorithm is the addition of user variables and adjustment of the difficulty level according to the reliability of the data user organization and the scope of use. Through Setup_p, the additional variable γ can be selectively applied according to the reliability of the user institution, and the degree of agreement of Witness is adjusted according to the reliability of the institution entered through Prove_p. The difficulty of the verification process is adjusted by considering the reliability of the institution entered through Verify_p. SimProve, a simulator, also refers to the scope of use and the reliability of the input authority. With this suggestion, it is possible to increase reliability and security of anonymity processing and distribution of personal information.

• 말소리와 음성과학
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• 제6권4호
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• pp.141-148
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• 2014

Voice is the most common means for communication, but some people have difficulties in generating voice due to their congenital or acquired disorders. Individuals with speech disorders might lose their speaking ability due to hearing impairment, encephalopathy or cerebral palsy accompanied by motor skill impairments, or autism caused by mental problems. However, they have needs for communication, so some of them use various types of AAC (Augmentative & Alternative Communication) devices in order to meet their communication needs. In this paper, a mobile application for literate people having speech disorder was designed and implemented by developing accurate and fast sentence-completion functions for efficient user interaction. From a user study and the previous study on Korean text-based communication for adults having difficulty in speech communication, we identified functionality and usability requirements. Specifically, the user interface with scanning features was designed by considering the users' motor skills in using the touch-screen of a mobile device. Finally, we conducted the usability test for the application. The results of the usability test show that the application is easy to learn and efficient to use in communication with people with speech disorders.