Lyapunov 차원을 이용한 화자식별 파라미터 추정

유병욱,김창석 명지대학교 대학원 1997 대학원논문집 Vol.1 No.-

This paper has apparaised ability of speaker recognition and speech recognition using correlation dimension and Lyapunov dimension. In this method, speech was regarded the cahos that the random signal is appeared in determinisitic raising system. We deduced exact correlation dimension and Lyapunov dimension with searching important orbit from AR model power spectrum when reconstruct strange attractor using Taken's embedding theory. We considered a usefulness of speech recognition and speaker recognition using correlation dimension and Lyapunov dimension that characterized reconstruction attractor. As a result of consideration, which were of use more the speaker recognition than speech recognition, and in case of speaker recognition using Lyapunov dimension were gain much recognition rate more than speaker recognitions using correlation dimension.

병렬 퍼지-뉴럴 방법에 의한 음성인식

허찬욱,유병욱,김창석 明知大學校 産業技術硏究所 1994 産業技術硏究所論文集 Vol.13 No.-

In this paper, a speech recognition method is proposed to resolve the time variation and the frequency variation that are major reasons of decreasing recognition rates of speech recognition. The time variation of speech and the frequency variation is known to differences of vocal cord and vocaltract among men. When LPCs of speech word is divided equally to cope with the problem of the time variation. The frequency variation of speech data can be absorbed by using the fuzzy inference and the artificial neural network. The parrel fuzzy neural network are proposed with combined both systems paralley to get higher recognition rate due to doing a compensation of each system errors. The result in our proposed system is that rates of the PFN 88.5[%].

카오스-퍼지에 의한 무선 비화시스템 연구

유병욱,오진우,김창식 명지대학교 대학원 1997 대학원논문집 Vol.1 No.-

In tins paper, the ratio of chaos signal per speech signal developed a new excellent security using a new Chaos-Fuzzy. The developed Chaos-Fuzzy security system utilize a few differential equation to occur chaos strange attracter and applied a digital signal processing. As the result, the developed Chaos-Fuzzy security system composed a flexible attracter occurrence development, gathered a high secure degrees, and tried a double security using attracter of the various styles. After the decoder system to security stystem made a pattern matching using fuzzy inference, recognize received attractor of security signal, remove a chaos signal, revive an original voice. As the result, obtained a good quality voice.

화자인식을 위한 퍼지-상관차원과 퍼지-리아프노프차원의 평가

유병욱,박현숙,김창석 한국음성과학회 2000 음성과학 Vol.7 No.3

In this paper, we propose two kinds of chaos dimensions, they fuzzy correlation and fuzzy Lyapunov dimensions, for speaker necognition. The proposal is based on the point that chaos enables us to analyze the non-linear information contained in individual's speech signal and to obtain superior discrimination capability. We confirm that the proposed fuzzy chaos dimensions play an important role in enhancin speaker recognition ratio, by absorbing the variations of the reference and test pattern attractors. In order to evaluate the proposed fuzzy chaos dimensions, we suggest speaker recognition using the proposed dimensions. In other words, we investigate the validity of the speaker recognition parameters, by estimating the recognition error according to the discriminnation error of an individual speaker from the reference pattern. Keywords : speaker recognition, fuzzy chaos dimensions, discrimination error

카오스차원에 의한 화자식별 파라미터 추출

유병욱,김창석 한국음성과학회 1997 음성과학 Vol.1 No.-

This paper was constructed to investigate strange attractor in considering speech which is regarded as chaos in that the random signal appears in the deterministic raising system. This paper searches for the delay time from AR model power spectrum for constructing fit attractor for speech signal. As a result of applying Taken's embedding theory to the delay tiem, an exact correlation dimension solution is obtained. As a result of this consideration of speech, it is found that it has more speaker recognition characteristic parameter, an gains a large speaker discrimination recognition rate.

릴레이 궤환을 이용한 자동동조 PID 제어기의 GUI-Program 개발과 수위온도제어 플랜트에의 실시간 적용

유병철(Byong-Chul Yoo),한진욱(Jin-wook Han),이창구(Chang-Goo Lee) 대한전기학회 1999 대한전기학회 학술대회 논문집 Vol.1999 No.7

당뇨병성 말초 혈관 질환의 진단에 있어 하지 혈관 초음파와 적외선 체열 검사의 비교

김병익,김유리,이영욱,이화영,이상종,조용욱,최윤상,박석원,엄현주,송승오,김시영 대한당뇨병학회 1999 Diabetes and Metabolism Journal Vol.23 No.5

Lyapunov 차원을 이용한 화자식별 파라미터 추정

유병욱,김창석,Yoo, Byong-Wook,Kim, Chang-Seok 한국음향학회 1997 韓國音響學會誌 Vol.16 No.4

본 논문에서는 음성을 비선형 결정론적 발생메카니즘에서 발생되는 불규칙한 신호인 카오스로 보고 상관차원과 Lyapunov 차원을 구함으로써 음성화자식별 파라미터와 음성인식파라미터에 대한 성능을 평가하였다. Taken의 매립정리를 이용하여 스트레인지 어트렉터를 구성할 때 AR모델의 파워스펙트럼으로부터 주요주기를 구함으로써 정확한 상관차원과 Lyapunov 차원을 추정하였다. 이트렉터 궤도의 특징을 잘 나타내는 상관차원과 Lyapunov 차원을 가지고 음성인식과 화자인식의 특징파라미터로의 효용성을 고찰하였다. 그 결과, 음성인식보다는 화자식별의 특징파라미터로타당하였으며 화자식별 특징파라미터로서는 상관차원보다는 Lyapunov 차원이 높은 화자식별 인식율을 얻을 수 있음을 알았다. This paper has apparaised ability of speaker recognition and speech recognition using correlation dimension and Lyapunov dimension. In this method, speech was regarded the cahos that the random signal is appeared in determinisitic raising system. we deduced exact correlation dimension and Lyapunov dimension with searching important orbit from AR model power spectrum when reconstruct strange attractor using Taken's embedding theory. We considered a usefulness of speech recognition and speaker recognition using correlation dimension and Lyapunov dimension that characterized reconstruction attractor. As a result of consideration, which were of use more the speaker recognition than speech recognition, and in case of speaker recognition using Lyapunov dimension were much recognition rate more than speaker recognitions using correlation dimension.

팩시밀리용 암호 시스템 개발

유병욱,한상수,Yoo Byong-wook,Han Sang-soo 한국정보통신학회 2006 한국정보통신학회논문지 Vol.10 No.2

자동으로 암호문과 평문의 수신이 가능한 팩시밀리용 암호통신시스템을 개발하였다. 개발된 암호시스템은 128bit SEED알고리즘을 적용하였으며 1024bit 모듈러, 256bits Exponent의 Diffie-Hellman 키교환방식을 적용하였다. 암호문 고속 전송을 위해 Dual FAX Server를 개발함으로써 실시간 암호통신을 구현하였다. Diffie-Hellman 키교환 시 등록된 시리얼번호를 서로 교환시켜 안전한 키 교환이 가능하게 하였다. We developed the facsimile encryption system that could send/receive the cipher text and plain text automatically. This facsimile encryption system is adopting the 128bits SEED encryption algorithm, 1024bits modular and 256bits exponential Diffie-Hellman key exchange method. We can reduce the cipher text transmitting time by developing the Dual Facsimile Server, it can make the real time encryption communication. Key is safely exchanged by the exchanging the listed serial numbers when the Diffie-Hellman key exchanging.

Thematic Poster : TP-74 ; Initiation of Anti-TNF Therapy Within 3 Weeks of LTBI Treatment in Patients with Immune-Mediated Inflammatory Diseases

( Ji Young Yang ),( Kyung Wook Jo ),( Seok Chan Hong ),( Bin Yoo ),( Chang Keun Lee ),( Yong Gil Kim ),( Suk Kyun Yang ),( Jeong Sik Byeon ),( Kyung Jo Kim ),( Byong Duk Ye ),( Sang Hyoung Park ),( Ta 대한결핵 및 호흡기학회 2014 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.118 No.-

Background: Tumor necrosis factor antagonists are increasingly used to treat patients with immune-mediated inflammatory disease including rheumatoid arthritis, ankylosing spondylitis, Crohn’s disease, and ulcerative colitis. Because TNF-alpha is essential for the prevention of latent tuberculosis recrudescence, patients treated with TNF-alpha inhibitors are at increased risk of developing active TB. The time of initiating anti-TNF therapy following the induction of LTBI treatment is different depending on each nation’s guideline. We aimed to investigate the treatment outcome of patients with immune-mediated inflammatory disease who received anti- tumor necrosis factor therapy within 3 weeks of latent tuberculosis infection treatment. Methods: A total of 411 patients received LTBI treatment before commencing TNF antagonist between June 2004 and October 2013 at a tertiary referral center in South Korea. Their medical records were retrospectively reviewed. Results: The mean age of the 411 study subjects was 44.5 years and 261(63.5%) were male. The underlying IMID was ankylosing spondylitis in 203(49.4%), rheumatoid arthritis in 136(33.3%) and inflammatory bowel diseases in 57(13.9%) patients. Anti-TNF agent was initiated in 61 patients(14.8%) within 3 weeks after chemoprophylaxis for LTBI, whereas 3 weeks later in remaining 350 patients( 85.2%). These two groups were comparable in terms of baseline characteristics, treatment regimens, anti-TNF agents used and follow-up duration except significant difference of the mean duration of LTBI treatment before starting anti-TNF therapy(8 vs. 30 days, p < 0.001). A total of 6 patients developed TB during follow-up period. All of these patients received anti-TNF agents 3 weeks after initiation of LTBI treatment. None in the patients who commenced TNF antagonist within 3 weeks of LTBI treatment developed TB. Conclusions: The present study suggested that TNF antagonist may be initiated within 3 weeks of LTBI treatment in patients with IMID.