• 농촌지도와개발
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• 제10권2호
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• pp.229-237
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• 2003

Since the 1960s in Korea, major broadcasting channels broadcasted farm television programs, however, airing of these programs were reduced in the 1990s. This was due to the declining number of farmers, and the low popularity rating of farm television programs. To cope with the situation, agriculture businessmen, farmers, and the officials concerned tried to acquire the independent farming television channel in cable television and satellite television, In 1998, one cable television channel started broadcasting, while another channel in satellite television began its broadcasting in 2001. One of the major concerns of the people in the broadcasting was actualization of the public interests in the new media multi-channel age. Recognizing this point, the study explored a few areas of concern such as conceptualizations of the public interest of the people in the digital age, examination of the surroundings of program production and marketing, and survey the media use behavior of target audience - rural residents; In the concept of the public interest, there are two points of view; market focused and democratic principle oriented. As the digitalization of broadcast advances and the logic of economics prevails, it is difficult to offer the public broadcasting service to farmers, however, democratic principles should be more emphasized. The rural resident prefer major terrestrial television channel to cable television and satellite television channel, and in media use behavior, the medium of major terrestrial television would be more useful for farm broadcasting.

• 한국지능시스템학회논문지
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• 제7권5호
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• pp.14-20
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• 1997

This paper proposes a new design method for the SMC-type FLC and shows that a SMC-type LFC is an extension of the SMC with BL. The conventional SMC-type FLC uses error and change-of-error as inputs of the FLC and generates the absolute value of a switching magnitude. Then, the fuzzy rule table is constructed on a two-dimensional space of the phase plane and has commonly the skew symmetric property. In this paper, we introduce a new variable, signed distance, from the skew symmetric property of the rule table. And thd variable becomes only a fuzzy variable that is used to generate the control input of a SMC-type FLC. that is, we design a new SMC-type FLC that uses a signed distance and a control input as the variables representing the contents of the rule-antecedent and the rule-con-sequent, respectively. Then the number of total rules is reduced and the control performance is almost the same as that of the conventional SMC-type FLC. Additionally, we derive the control law of the ordinary SMC with BL from a new SMC-type FLC. Namely, we show that a FLC is an extension of the SMC with BL.

• 대한전자공학회논문지TC
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• 제46권6호
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• pp.66-77
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• 2009

본 논문에서는 SCA 기반 무선통신환경에 적합한 코바 미들웨어의 확장에 대해 기술한다. 제안한 미들웨어 확장은 모든 컴포넌트가 컴포넌트의 구현 방식에 대한 고려없이 상호 연동될 수 있도록 보장하며 기존 방식에 비해 성능 개선이 가능하다. 이러한 미들웨어 확장은 HAO와 IDL2VHDL 컴파일러, 그리고 ORBit의 개선을 포함한다. HAO는 FPGA 환경을 고려하여 로직수준에서 개발된 ORB이며, FPGA의 특성에 따라 일부 기능은 제한되었다. 추가로, IDL2VHDL 컴파일러는 CORBA IDL로 부터 하드웨어 기술언어인 VHDL로의 매핑과 추가의 절차들을 제공한다. 마지막으로, ORBit는 HAO와 직접 연동할 수 있도록 개선된 GPP상의 코바 ORB이다.

• 한국도서관정보학회지
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• 제40권2호
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• pp.139-159
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• 2009

본 연구의 목적은 이용자 지향적인 정보검색을 수행하기 위한 질의확장용 지식베이스를 구축하는 것이다. 이를 위해 개념기반 정보검색방법과 통계적 기반 정보검색방법을 이용한 지식베이스 구축에 관련된 다양한 이론 연구를 수행하였다. 이들 지식베이스 구축방법에 있어서 공통된 가설은 연관용어의 출현은 문헌집합내의 동시출현 빈도임을 재확인하였고, 이 가설을 근거로 색인파일 알고리즘과 부울 논리의 And 연산자를 이용하여 질의확장용 지식베이스를 구축하였다. 본 지식베이스의 실험 주제는 교육학이며, 교육학개론이란 단행본을 이용하여 색인어들의 연관용어를 자동으로 제시해줄수 있는 실험용 지식베이스를 구축하였다. 실험용 지식베이스는 자연어색인방법과 통제어색인방법을 이용하여 두 개의 지식베이스를 구축해 각 지식베이스 시스템의 질의확장 성능에 대한 평가 작업을 수행하였다.

• 전자공학회논문지SC
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• 제40권6호
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• pp.48-57
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• 2003

본 논문에서는 가산기 기반 분산연산방식(Adder-Based DA)과 bit-serial방식을 적용한 8×l ID-IDCT프로세서를 제안하였다. 하드웨어 소모를 줄이기 위해 bit-serial 방식을 적용하고 동작 속도의 향상을 위해 분산연산 방식을 적용한다. 또한 계수식의 변환을 통해 하드웨어 구현의 규칙성과 크기를 줄일 수 있으며 동작 클럭수를 줄이기 위해 부호 확장 처리 방식을 제안한다. 합성결과 게이트 수는 총 17,504개가 사용되었고 이중에서 부호 확장처리단은 전체 구조에서 20.6%를 사용하게 된다. 짝수, 홀수 부분에서는 기존의 계수표현에서 non-zero 비트가 130개가되지만, 제안한 방식을 적용한 짝수와 홀수 부분에서의 non-zero 비트는 각각 28개와 32개로 54% 줄일 수 있었다. 또한 부호 확장 처리단의 제안함으로써 처리율은 2배가 향상되었고 설계한 IDCT 프로세서는 100㎒에서 50Mpixels/s의 처리율을 나타내었다.

• International Journal of Fuzzy Logic and Intelligent Systems
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• 제14권2호
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• pp.145-153
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• 2014

With reasonable control selections on the space of functions, various application models can take the shape of a well-defined control system on mathematics. In the credibility space, controlability management of fuzzy differential equation is as much important issue as stability. This paper addresses exact controllability for fuzzy differential equations in the credibility space in the perspective of Liu process. This is an extension of the controllability results of Park et al. (Controllability for the semilinear fuzzy integro-differential equations with nonlocal conditions) to fuzzy differential equations driven by Liu process.

• International Journal of Fuzzy Logic and Intelligent Systems
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• 제11권1호
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• pp.25-32
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• 2011

In this paper, we study the existence and uniqueness of solutions for the impulsive semilinear fuzzy integrodifferential equations with nonlocal conditions and forcing term with memory in n-dimensional fuzzy vector space ($E^n_N$, $d_{\varepsilon}$) by using Banach fixed point theorem. That is an extension of the result of Kwun et al. [9] to impulsive system.

• International Journal of Fuzzy Logic and Intelligent Systems
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• 제10권4호
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• pp.275-280
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• 2010

Verification of efficiency in data management fuzzy entropy and similarity measure were discussed and verified by applying reliable data selection problem and numerical data similarity evaluation. In order to calculate the certainty or uncertainty fuzzy entropy and similarity measure are designed and proved. Designed fuzzy entropy and similarity are considered as dissimilarity measure and similarity measure, and the relation between two measures are explained through graphical illustration. Obtained measures are useful to the application of decision theory and mutual information analysis problem. Extension of data quantification results based on the proposed measures are applicable to the decision making and fuzzy game theory.

• International Journal of Contents
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• 제5권2호
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• pp.53-58
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• 2009

This paper presents a novel approach in the design of a CAM for an asynchronous cache. The architecture of cache mainly consists of four units: control logics, content addressable memory, completion signal logic units and instruction memory. The pseudo-DCVSL is useful to make a completion signal which is a reference for handshake control. The proposed CAM is a very simple extension of the basic circuitry that makes a completion signal based on DI model. The cache has 2.75KB CAM for 8KB instruction memory. We designed and simulated the proposed asynchronous cache including CAM. The results show that the cache hit ratio is up to 95% based on pseudo-LRU replacement policy.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 제36회 하계학술대회 논문집 A
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• pp.178-180
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• 2005

Recently, electrical demands increase rapidly in metropolitan areas according to the extension of urban areas. Therefore underground transmission lines are getting expanded. This paper presents the rapid and accurate algorithm for fault discrimination and fault location in underground transmission lines. This paper uses fuzzy logic method using voltage and zero sequence for fault discrimination. And this paper uses travelling wave and wavelet transform for fault location. To prove the performance of the algorithm, it test algorithm with signal obtained from ATPDraw simulation.