• Journal of architectural history
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• v.3 no.2 s.6
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• pp.125-141
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• 1994

Alois Riegl's aesthetic theory of visual perception provided one of important conceptual backgrounds for Vienna Art Nouveau architecture. Riegls theory of visual perception consists of geometric style and two-dimensional transformation. Riegl's theory of geometric style is based on the modern aesthetic theory of abstraction, which says that the artistic perfection can be obtained not from a direct imitation of natural objects, but from an abstract transformation of them. Riegl's theory of two-dimensional transformation, on the other hand, aims at obtaining artistic perfection by disintegrating volumetric conditions of natural things into planes and combining the planes thus obtained into another new world of art. These two theories of Alois Rigl's provided an important aesthetical background for the design strategy of 'abstract ornamentaion of two-dimension' in Vienna Art Nouveau architecture. This paper is to review the basic concept of Alois Rigl's theory of geometric style and two-dimensional transformation.

• Proceedings of the Korea Society of Poultry Science Conference
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• 2000.06a
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• pp.39-46
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• 2000

타조알의 형성은 배란된 난자가 나팔관과 난백분비부, 협부, 자궁 그리고 총배설강을 통과하면서 완전한 형태의 알로 산란된다. 그리고 1 clutch size가 40$\pm$15개 정도이다. 알의 크기는 1,450g에서 200~400g의 변이가 있는 것으로 본다. 타조의 난질에는 cuticle 층이 없어서 병원균의 침입에 약하다. 그리고 알의 껍질은 2mm 정도로 두꺼우며 그주요 성분은 달걀의 껍질에서와 마찬가지로 calcium carbonate이다 타조알의수거는 수놈의 방해가 없도록 하여야 하며 bacteria나 fungi의 침입이 업도록 하여야 한다. 수거된 알은 저장하였다가 부화기의 수용능력이 되면 부화를 시작한다. 부화 전에 아를 저장할 경우 15~18$^{\circ}C$로 저장실 온도를 유지하면 7일 정도 저장이 가능하지만 7일 이상 저장할 경우 12$^{\circ}C$로 저장온도를 낮추고 이때 상대습도는 75%로 유지하는 것이 이상적이다. 부화기의 온도는 36.0~36.5$^{\circ}C$가 이상적이며 이때 이상적인 습도는 35%이하이어야 한다. 또 부화중 전란을 하여야 하는데 대개 한시간에 한번씩 74~90。로 전란 해주는 것이 바람직하다. 부화에 적당한 알은 기형적으로 크거나 작으면 부화율을 높이지 못한다.

• Proceedings of the KIPE Conference
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• 1998.07a
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• pp.384-387
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• 1998

This paper presents a newly developed speed sensorless drive using RLS(Recursive Least Squares) based on Neural Network Training Algorithm. The proposed algorithm based on the RLS has just the time-varying learning rate, while the well-known back-propagation (or generalized delta rule) algorithm based on gradient descent has a constant learning rate. The number of iterations required by the new algorithm to converge is less than that of the back-propagation algorithm. The RLS based on NN is used to adjust the motor speed so that the neural model output follows the desired trajectory. This mechanism forces the estimated speed to follow precisely the actual motor speed. In this paper, a flux estimation strategy using filter concept is discussed. The theoretical analysis and experimental results to verify the effectiveness of the proposed analysis and the proposed control strategy are described.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.18 no.2
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• pp.270-278
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• 1993

This paper is presented the phonetic segmentation alg9rithm of the Korean speech signals which is finded the exact pitch using the super resoluton pitch determination and is compared corss-correlation to threshold each pitch period. The features of the proposed algorithm are infinite resolution and high reliability, and also can separate transient or silent segment. The algorithm is instrumental to speech processing applications which require vector quantization and speech recognition. The presented algorithm is implemented by 386-MATLAB on PC 386/DX and is verified the exact pitch period and the phonetic segmentation of speech signals.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.14 no.1
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• pp.1-10
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• 1989

In this paper a computional algorithm which can circumvent the overflow and underflow problems is proposed for calculating the blocking probabilities in the multi-dimensional multi-slot connection trafficd. This algorithm is applied to the analysis of blocking probabolotoes in the single time switches and transmission systems with varying the total number of time slots and trunk lines, respectively.

• Elastomers and Composites
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• v.28 no.4
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• pp.283-292
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• 1993

The morphology and impact strength of alloys of high density polyethylene(HDPE) and nylon-6(PA) with modified $ethylene-{\alpha}-olefin$ copolymer(OCP) as compatibilizer and impact modifier were measured by the scanning electron microscope(SEM) and the notched Izod impact test(and the high rate impact test), respectively. HDPE is incompatible with PA and specimens obtained from simple mechanical mixing show the inferior properties. However, it was indicated that OCP played roles of not only impact modifier but also compatibilizer. High rate impact test results were different from those of the notched Izod impact test, but in both tests OCP was effective for HDPE/PA blends. From SEM observation, the size of the dispersed phase in alloys prepared with OCP is much smaller than that of alloys without OCP and the interfacial adhesion of alloys prepared with OCP is also better. Toughening mechanism of polymer blends was discussed by combining the morphology analysis with mechanical and thermal properties.

• Proceedings of the Korean Information Science Society Conference
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• 1999.10a
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• pp.427-429
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• 1999

원격 링킹 로더는 크로스 컴파일러에 의하여 컴파일된 목적 코드를 원격 타겟 시스템에 전송하여 실행할 수 있게 한다. 이 링킹 로더는 내장형 프로세서를 탑재한 시스템에서 사용되는 소프트웨어 개발 환경에 널리 써왔다. 본 연구의 점진적 원격 링킹 로더는 목적 모듈을 호스트로부터 타겟으로 로딩하는 원격 로딩과 모듈이 로딩될 때 이미 로딩된 모듈들과 통합 링킹하는 점진적 링킹의 역할을 수행한다. 특히, 점진적 링킹은 여러 모듈들이 로딩/언로딩 될 때 사용자가 로딩/언로딩 순서를 고려해야 하는 번거로움을 해결하였다. 본 논문에서는 원격 로딩과 점진적 링킹을 가능하게 하는 로딩/언로딩 알로리즘을 제시하였다. 그리고 이 알고리즘은 [8]에서 개발된 타겟 서버 미들웨어 시스템에서 구현하였다. 본 논문에서 제시하는 점진적 언격 링킹 로더는 내장형 시스템의 개발 환경 사용에 보다 많은 사용자 편의성을 줄 것으로 기대된다.

• Proceedings of the Korean Information Science Society Conference
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• 1999.10a
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• pp.646-648
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• 1999

본 논문에서는 RSA 암호 알고리즘의 핵심 계산 과정인 모듈로 곱셈 연산의 효율적인 하드웨어 구현을 위해 새로운 알고리즘과 하드웨어 구조를 제시한다. 기존의 몽고메리 알고리즘이 LSB 우선 방법을 사용한 것과는 달리 여기서는 MSB 우선 방법을 사용하였으며, RSA 암호 시스템에서 키가 일정 기간 동안 변하지 않고 유지된다는 점에 착안해 계수(Modulus)에 대한 보수(Complements)를 미리 계산해 놓고 이를 이용하여 모듈로 감소 처리를 간단히 덧셈으로 치환하도록 하였다. 보수들을 저장할 몇 개의 레지스터와 그들 중 하나를 선택하기 위한 간단한 멀티플렉서(Multiplexer)만을 추가함으로써 몽고메리 알고리즘이 안고 있는 홀수 계수 조건과 사후 연산이라는 번거로움을 없앨 수 있다. 본 논문에서 제안하는 알고리즘은 하드웨어 복잡도가 몽고메리 알고리즘과 비슷하며 그 내부 계산 구조를 보여주는 DG(Dependence Graph)의 지역 연결성 (Local Connection), 모듈성(Modularity), 데이터의 규칙적 종속성 (Regular Data Dependency)등으로 인한 실시간 고속 처리를 위한 VLSI 구현에 적합하다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.31 no.6B
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• pp.561-571
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• 2006

RFID technology, as one contact-less identification technology with using electronic tag, is the field where its multiple researches have been studied. Especially, in the field of supply chain management, when it is necessary to identify a lot of objects by real-time, performance of anti-collision algorithm for multiple tag identification has an effect on performance of entire system. GEN2 is global, open, interoperability protocol for UHF RFID system, the active researches and developments are processed about it. In this paper, we introduce an anti-collision algorithm based on Slotted-ALOHA for GEN2 protocol, focus on estimating number of tags and setting number of slots and review the previous works. We propose new scheme that can estimate number of tags efficiently, and define system efficiency newly when it's used in setting number of slots. We also present result of compare and analysis with previous scheme through simulation. The proposed scheme of estimating number of tags is easy to implement, number of tags which is less than 4 times of number of slots can estimate tags efficiently, we also proved that identification efficiency based on weighted-slot distinguished with definition of previous slot efficiency can improve system efficiency.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.43 no.8 s.350
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• pp.35-46
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• 2006

When an RFID reader attempts to read the tags, interference might occur if the neighboring readers also attempt to communicate with the same tag at the same time or the neighboring readers use the same frequency simultaneously. These interferences cause the RFID reader collision. When the RFID reader collision occurs, either the command from the reader cannot be transmitted to the tags or the response of the tags cannot receive to the reader correctly, Therefore, the international standard for RFID and some papers proposed the methods to reduce the reader collision. Among those, Colorwave and Enhanced Colorwave is the reader anti-collision algorithm using the frame slotted ALOHA based a TDM(Time Division Multiplex) and are able to reduce the reader collision because theses change the frame size according to a collision probability. However, these can generate the reader collisions or interrupt the tag reading of other readers because the reader that collides with another reader randomly chooses a new slot in the frame. In this paper, we propose a new RFID reader anti-collision algorithm that each reader monitors the slots in the frame and chooses the slot having the minimum occupation probability when the reader collision occurs. Then we analyze the performance of the proposed algorithm using simulation tool.