Kuo모델을 개선한 2차 경로 모델링 방법

박병욱,김학윤 청주대학교 산업과학연구소 2001 産業科學硏究 Vol.19 No.1

A method of an adaptive prediction error filter has been proposed for improving secondary path modeling performance by Kuo et al, in the modeling method of the secondary path using on-line This method have some disadvantages that have to use a additive noise and a noise control performance is not good since it is focused on the estimation performance of the secondary path. In this paper, the modified Kuo model, using gain control parameters and delay, is for using a reference signal to additive noise to improve the problems of the existed Kuo model is proposed. Gain control parameters and delay for optimal performance of the proposed system were 003 and 92, respectively. Simulation results were that estimation performance of the secondary path was same to that of the Kuo model, and noise control performance was improved by 20dB compare to that of the Kuo model The proposed model is simplified since it did not need to use an additive noise generator.

지역 특성화 방안으로서의 디자인 가치와 역할에 관한 연구

김병욱,김남훈 한국패키지디자인학회 2002 상품문화디자인학연구 Vol.11 No.-

Industrialization and Urbanization have given rise to ill effects in areas such as standardization and simplification. As a result, each area has developed abnormally losing its own uniqueness. And the values of design have been changing as the main source of design changing. Now is the Information age. The key words of design are culture. So during globalization and localization in country, the diverse economic cultural activities adopting the area's uniqueness are the starting point for development and widening its identity. Excavating and developing local cultural industries are urgent considering the importance of economic profits not having environmental problems. But cultural design can solve this conflict. This study will propose good design cultural city model that has economic and cultural value by design. Factors identifying an area's characteristics may be classified as formation works of urban identity, landscape design, cultural industry, developing local areas, etc. This study was a concrete approach the compose and analyze domestic and foreing cases factors. For practical analysis and application on a certain local city's characteristics from a design point of view, way of local development and cultural industry in the city have been researched.

菜蔬의 連作障害에 關한 硏究 : I.菜蔬連作障害實態 I. Present Status of Soil Sickness in Continuous Vegetable Cropping

李炳馹,鄭厚燮,林善旭 서울大學校 農科大學 1983 서울대농학연구지 Vol.8 No.1

Present status of soil sickness in continuous vegetable cropping was investigated by means of interviews and field surveys. Investigations were made major vegetable crops such as Chinese cabbage, radish, red pepper, garlic,cucumber and others in the field or in the plastic house where a known vegetable crop was cultivated continuously for a long period. 1. In Chinese cabbage both for summer and autumn crops, bacterial soft rot was the most destructive one and followed by club root, root rot and boron deficiency in that order. 2. No serious soil sickness was generally observed in certain root crops such as radish and carrot except that root knot of carrot in Cheju. However,radish was damaged occasionally by Fusarium yellows and boron deficiency. 3. In general,Phytophthora rot and bacterial wilt were severe in red pepper, while nematode damages and bacterial canker occurred in a limited area. 4. With cucurbits,cucumber,muskmelon,and watermelon, although Fusarium wilt and stem blight were severe, those could be controlled by grafting Powdery mildew, grey mold and downey mildew occurred freqeuntly in the plastic house. 5. There were almost free from soil sickness problems in bulbous vegetable crops, garlic, onion and shallot. However root mite damage of shallot was severe and percentage of garlic blight has increased as increasing continuous cropping period with poor cultural practices. 6. Strawberry has damaged greatly by Fusarium yellows with incrcasing bud blight and that the cultivation is shifting toward the disease free land. 7. In lettuce, Sclerotinia soft rot, downey mildew and bacterial soft rot were prevalent and marginal leaf spot caused by Pseudomonas species on heading lettuce was severe in some areas. 8. There were severe damages of peanut due to root knot and Cercospora leaf spot while occasionally bacterial soft rot, and deficiencies of calcium and boron were observed in celeries.

TSP를 이용한 소형 마이크로폰의 주파수 특성 분석 알고리즘

박병욱,김학윤 청주대학교 산업과학연구소 2007 産業科學硏究 Vol.24 No.2

The frequency response of a microphone, which indicates the frequency range that a microphone can output within the approved level, is one of the most significant standards used to measure the characteristics of a microphone. At present, conventional methods of measuring the frequency response are complicated and involve the use of expensive equipment. To complement the disadvantages, this paper suggests a new algorithm that can measure the frequency response of a microphone in a simple manner.

Filtered-X LMS 알고리즘의 오동작에 관한 고찰

박병욱,김학윤 청주대학교 산업과학연구소 2000 産業科學硏究 Vol.18 No.1

The Filtered-X LMS(FXLMS) algorithm in active noise contol(ANC) requires to estimate the transfer characteristic between the output and the error signal of the adaptive canceler. The modeling errors, which secondary-path transfer function is not corresponded with modeling secondary-path exactly, affect convergence speed and adaptive filter coefficients. The adaptation of the adaptive filter coefficient has behaviors when modeling errors are occurred. Therefore, we study about convergence characteristics of the Filtered-X LMS algorithm when modeling errors are occurred.

그래픽환경과 웹 홈페이지 디자인에 관한 연구

김남훈,김병욱 한국패키지디자인학회 2002 상품문화디자인학연구 Vol.11 No.-

The design of a Web home page plays a critical role in the effective transmission of messages by approaching with visual images. The transmission of the intended information cannot be made can induce the interest of the viewers. Contemporary information-oriented cultures lays heavy importance on industrial design, especially on the design of Web home page. The most critical problem is the lack of professional experience and knowledge in the design of Web home page, which is caused largely by the short history of using Internet. It results in the poor awareness of the role and significance of the design of the Web home page and of the professional designers, currently, the home page design has been led not by the professional designers or artists but by those computer engineers and information processing technicians. As the result, hypocritical formats and appearances which are short of creativity and significance of the design of the Web home page and of the professional designers, currently, the home page design has been led not by the professional designers or artists but by those computer engineers and information processing technicians. As the result, hypocritical formats and appearances which are short of creativity and originality are prevalent in the design of current home pages without properly taking into consideration the design elements. In order to establish the role of design in creating the Web home pages, it is required that professional illustrators and photographers be widely employed to work on the design of the home pages. It will allow their works to be creative and differential so as to induce more users. The professional designers, in turn, could be encouraged to take part in the design of the Web home pages. Ultimately, it will make the Internet take the leading role in the multimedia society as a ideal media of communication among the designers and world wide users as well.

소음성 난청 선별검사용 문진표의 유용성

송재석,최병수,원종욱,노재훈 大韓産業醫學會 2000 대한직업환경의학회지 Vol.12 No.4

목적 : 소음 특수건강진단시 문진표의 유용성을 알기 위하여 실시되었다. 방법 : 자료로는 전국을 5대 권역으로 나눈 후 연구에 협조적인 산업보건기관을 대상으로 하여, 소음성 난청이 발생한 사업장과 그 부서에 대하여 정상인 근로자의 검진기록과 작업환경측정 기록 및 문진표를 수집하여 분석하였다. 결 과 : 각각의 문진 항목과 청력이상 여부에 대한 분석결과, 귀에서 소리가 난다고 하는 항목과 최근 작은 소리가 잘 안들린다고 하는 만성 특이적 항목만 청력이상 여부와 관계가 있었고, 급성 항목들은 청력 이상 여부와 통계적 연관성이 없었다. 또한 7개의 설문 항목과 연령 및 근무경력만을 이용하여 청력이상을 판정한다고 하였을 때, 실제 건강진단 결과와 비교하게 되면 민감도, 59 %, 특이도, 88 %로 계산 되었으며, 평균 23 %정도가 잘못 분류되었다. 결 론 : 만성적이고 특이적인 항목을 위주로 한 단순하고도 판별력있는 항목의 개발이 필요하며, 이러한 항목들을 전산화하였을 때, 효과적인 소음성 난청의 선별검사 체계를 구축할 수 있을 것이다. Objectives : This study was performed to investigate the effectiveness of the questionnaire. Methods : Workers'health examination records, work environment record, and questionnaires of selected industries as samples were analysed using logistic regression analysis and discrimination analysis Results'Cases of bearing impairment (Dl+C) as dependent variables, and age, work duration and level of environmental noise as independent variables were selected for multiple unconditional logistic regression analysis. Odds ratio was 4.04 in hearing difficulty, 2.78 in tlnnitus and 1.08 in age. In the second analysis Noise induced hearing loss is selected as dependent variable. The OR in hearing difficulty was 3.67(95 % C.1. : 1.61 8.61), and was 1.09(95 % C.1. : 1.05-1.14) in age. Conditionnal multlple logistic regression analysis was performed. In hearing impairment as dependent variable, the OR of age was 1.02(95 % C.1. : 1.00-1.04) and other variables were not significant. However, NIHL as dependent, the OR of hearing difficulty was 4.57(95 % C.1. : 1.43-14.67). According to multiple logistic regression adopting each items of questionnaire as dependent variable, the only item of hearing difficulty showed significant difference with hearing ability. The discrimination analysis was performed with the class variable of hearing impairment, and discrimination variables of age, work duration, and environment noise level. The sensitivity of 59 %, and specificity of 88 %, and average error count of 23 % were obtained. When the numbers of items answered in questionnaire were assumed as the parameter of judgement for noise induced hearing loss (NIHL), the highest sensitivity and specificity were 33.5% and 49.0% in cases of more than two items answered. Conclusions : The development of items that is simple and discriminative mainly consisted of chronic and specific diseases related items is needed. Computerization for newly developed items might be needed to establish effective surveillance system for NIHL in the future.

압전가속도센서의 온도영향 보상

임종인,신병철,김선욱,백성기 경북대학교 센서기술연구소 1991 센서技術學術大會論文集 Vol.2 No.1

본 연구에서는 사용한 압전세라믹스의 유전특성에 대한 온도의존성과 압전가속도 센서 특성과의 상관 관계를 기술하였다. 그러고 고온에서 사용가능한 압전가속도 센서를 설계하고, 정전용량의 NTC(Nagative Temperature Coefficients)특성을 갖는 세라믹을 사용하여 온도 변화에 따른 압전세라믹의 전기적특성을 안정화시킬수 있는 방법을 제안한다. we descibed the influence of elevated temperature on dielectric properties of piezoelectric ceramics and explained the characteristics between piezoceramics and piezoelectric accelerometers. And we also designd the piezoelectric accelerometer for high temperature applications. A method of impedence stabilization is suggested, where the ceramics with negative temperature coefficients is used to stabilize the electrical impedence of the piezoelectric accelerometers.

중소기업 공동브랜드 활성화를 위한 패키지디자인 연구

김남훈,김병욱 한국패키지디자인학회 2003 상품문화디자인학연구 Vol.14 No.-

Like above, in the meantime 'Development of Joint Brand by the Small-Medium Companies' has been researched briskly as a method of enhancing the value-added of products among the Small-Medium Companies with poor competitiveness in various sides. The object of 'Development of Joint Brand' of these products is to cut the huge expenses of development for investment at the early stage when newly developing their own Brands among a lot of Small-Medium Companies at the minimum, and minimize the danger of failure in the consumption market as soon as possible, and increase the sales among the Small-Medium Companies. For the development of these Joint Brands the various Small-Medium Companies should develop the unified Brand of products with the co-operative joint, manage the quality of products and Package design as well as marketing and publicity as a whole. After all, they are effective ways to push efforts to address the Brand image at the maximum and enhance an international image. It may be low-cost and high-efficiency strategy. The method of development of Joint Brands by the domestic Small-Medium Companies in the past appears again recently. Accordingly, it starts to appear a trademark by Joint Brand strategy with new concept, not the existing method. For example, Haebito Co, Ltd., a Brand related to foods, planned a Brand first, and collected affiliats. And then they took a method to sell the products with a unified Brand after receiving the products from the 90 food companies. This is, they stepped forward from the strategy of the existing general Joint Brand, made already planned Brand with a concept of unified Brand in the fields of marketing, publicity, and distribution, etc. As a result of that, they come to obtain cost reduction effect in various aspect as well as 'Brand Power' largely. This study, 'A Study on Package design for Activating Joint Brand for Small-Medium Companies', is to use a case of Joint Brand strategy of general concept that the domestic Small-Medium Company tried to do. And it is to develop the Joint Brand by the characteristics of products with the recent unified concept. Also, the object of this study is to approach the Package design for creating new high value-added.

I-SSR 標識子를 利用한 호도나무屬의 識別 및 類緣關係 分析

黃錫仁,曺炅眞,李文鎬,李在善,李炳實,李郁 한국임학회 2004 한국산림과학회지 Vol.93 No.7

DNA 표지자를 이용한 호도나무 품종의 유연관계 및 품종구분을 위하여 I-SSR 9개 표지를 이용하여 104개의 유의적인 표지가 얻어졌으며, 신품종 호도나무를 포함한 83개 국내외 품종(종)에 대해 DNA 지문에 의한 품종식별이 가능하였다. 수원 1호, 수원 2호, 왕호도는 모두 Conrord, McKinster 등 미국에서 도입된 대립성 품종과의 인공교배로 육성된 품종으로 유전적 유연관계가 상촌 4호 등 국내 선발종보다는 산성 4호×Concord의 교배종과 더 가까웠다. 국내 선발종 호도나무인 상촌 2호, 상촌 4호 및 산성 4호 이들 끼리 한 그룹을 이루고 있는데 이는 국내의 호도나무가 외국품종과 구분되는 유전적 동질성이 있음을 보여주었다. 영동은 개체선발로 육성되었으나 외국종과 교배에 의하여 육성된 교잡종들과 같은 무리에 속하였는데, 이는 영동 품종은 외국 품종의 교배에 의해 외래 유전자 일부가 유입된 것이 아닌가 추정된다. Concord×상촌 1호., Concord×상촌 2호, Concord×대부 1호가 한 무리를 이루었고 Lake×상촌 2호가 이들과 구분되는 것은 교배차대가 유전적으로 화분수보다는 모수의 영향을 더 많이 받고 있음을 보여준다. Using 104 fragments amplified from 9 I-SSR primers, a total of 83 cultivars in Juglans spp. including new cultivars used for the present study were identified. The new cultivars 'Suwon No.1', 'Suwon No.2', and 'Wanghodo' are hybrids between the domestic cultivars and the introduced cultivars such as 'Concord' and 'McKinster' bearing big nuts. Consequently, these cultivars were closer to the hybrid between 'Sansung 4×Concord' than to domestically selected cultivars such as 'Sangehon 4' from the viewpoint of genetic relationship. The domestic cultivars such as 'Sangchon 2', 'Sangchon 4', and 'Sansung 4' belonged to the same group and were genetically distinctive from the introduced cultivars. This suggests that there would be difference in genetic structure between the domestic and the introduced cultivars. The cultivar 'Yeongdong' was clustered into the group of hybrids between the domestic and the introduced cultivars although it was developed by the selection of a tree from a domestic population. This might be because the genes were introduced from the introduced cultivars into the domestic population via open-pollination. The 'Concordx×Sangchon 1', 'Concord×Sangchon 2', and 'Concord×Daebu 1' were Clustered into the same group whereas 'Lake×Sangchon 2' was clustered into the different group. This ndicates that the genetic characteristics of hybrids may be influence more strongly by the mother tree than by the father tree.