• 정보처리학회논문지A
• /
• 제9A권3호
• /
• pp.271-280
• /
• 2002

본 논문에서는 Perfect Shuffle 기법과 Kronecker 곱에 의한 다치 신호처리회로의 입출력 상호연결에 대하여 논하였고, 다치 신호처리회로의 입출력 상호연결 방법을 이용하여 유한체 GF$(p^m)$상에서 다치 신호처리가 용이한 다치 Reed-Muller 전개식의 회로설계 방법을 제시하였다. 제시된 다치 신호처리회로의 입출력 상호연결 방법은 모듈구조를 기반으로 하여 행렬변환을 이용하면 회로의 가산게이트와 승산게이트를 줄이는데 매우 효과적임을 보인다. GF$(p^m)$상에서 다치 Reed-Muller 전개식에 대한 다치 신호처리회로의 설계는 GF（3）상의 기본 게이트들을 이용하여 다치 Reed-Muller 전개식의 변환행렬과 역변환행렬을 실행하는 기본 셀을 설계하였고, 다치 신호처리회로의 입출력 상호연결 방법을 이용하여 기본 셀들을 상호연결하여 실현하였다. 제안된 다치 신호처리회로는 회선경로 선택의 규칙성, 간단성, 배열의 모듈성과 병렬동작의 특징을 가지므로 VLSI 화에 적합하다

• 한국항해항만학회지
• /
• 제28권1호
• /
• pp.23-29
• /
• 2004

본 논문은 EUROFIX 시스템에 적용하기 위한 Reed-Solomon 코딩에 대해서 다룬다. EUROFIX는 최근에 위성시스템의 비상수단으로서 인식되는 LORAN-C 시스템을 이용하여 DGNSS(Differential Global Navigation Satellite Systems) 정보를 전송하는 통합위치결정 시스템으로서, LORAN-C 신호 펄스열들의 펄스 위치 변조에 의한 LORAN-C 전송을 통해서 데이터 통신을 한다. 또한 통신 시스템에서 처리되는 광대한 양의 데이터에 대한 오류론 제어하기 위한 수단으로 오류 정정 부호나 정정 알고리즘이 대두되었으며, 실제로 중요한 적용요소가 되고 있다. 이에 따라 본 논문에서는 EUROFIX 정보전송의 부호화과정에서의 오류정정을 위해서 유한체 푸리에 변환을 이용한 Reed-Solomon 코드의 부호화 및 복호화에 대해서 연구하였다. 시뮬레이션을 통해서, EUROFIX 정보전송의 오류정정에 효과적인 것을 알 수 있었다.

• The Korean Journal of Ecology
• /
• 제25권4호
• /
• pp.241-245
• /
• 2002

During the breeding season of 1998, breeding ecology of the Great Reed-Warbler (Acrocephalus arundinaceus orientalis) was studied at Yangsoo-ri and Yongdam-ri of the Yangpyung-gun, Kyunggi province, Korea. Egg-weight (CV: 6.25) was more variable than either length or breadth, and breadth was the least variable of the measures. Significant variations in overall egg-weight occurred between clutches, and that more of the total variation in egg-weight and shape are due to inter-clutch variation as to intra-clutch variation when the data were pooled. The last egg tends to be larger than the remaining eggs in the clutch of the Great Reed-Warbler, suggesting the Great Reed-Warbler may adopt the brood-survival strategy. When method 3 was used, the most common incubation period is 12 days. In the Great Reed-Warbler, the length of the incubation period was related to clutch-size when method 1 (r=0.485, p<0.05) and method 2 (r=0.621, p<0.01) were employed, but not related to egg weight. The averagee number of days of hatching asynchrony was 2.5, raging 0.5~2.5. Asynchronous hatching was related to the clutch size (r=0.66, p<0.01). Hatching sequence was closely related to the laying sequence (r=0.93, p<0.001), suggesting Great Reed-Warblers incubate their eggs before clutch completion. The effect of egg weight on hatching asynchrony was found in Great Reed-Warblers (t-test, p<0.01).

• 한국자원식물학회:학술대회논문집
• /
• 한국자원식물학회 2021년도 춘계학술대회
• /
• pp.49-49
• /
• 2021

The roots of reed (Phragmites australis) were used in traditional medicine to treat respiratory problems, including symptoms such as high fever and cough. In this study, we identified the active ingredient from 70% EtOH reed root extract, and evaluated the whitening, wrinkle improvement and moisturizing effects. The content of p-coumaric acid, the active ingredient of the roots of P. australis, was slightly lower in 70% EtOH extract than in 100% EtOH extract. However, 70% EtOH reed root extract showed similar or higher effect in reducing power, DPPH, hydrogen peroxide scavenging, and nitric oxide scavenging activity compared to 100% EtOH extract. Moreover, 70% EtOH reed root extract markedly inhibited melanogenesis in B16F10 cells treated with α-melanocyte-stimulating hormone. 70% EtOH reed root extract significantly inhibited the mRNA expression of matrix metalloproteinase-1 (MMP-1) and reduced elastase activity in HDF human dermal fibroblasts. In addition, 70% EtOH reed root extract ameliorated hyaluronic acid synthase-2 (HAS-2) expression induced by ultraviolet B (UVB) stimulation in HaCaT keratinocytes. The results of this study suggest that 70% EtOH reed root extract has potential as a functional cosmetic material related to whitening, wrinkle improvement, and moisturizing.

• 대한전자공학회:학술대회논문집
• /
• 대한전자공학회 1998년도 하계종합학술대회논문집
• /
• pp.15-18
• /
• 1998

본 논문에서는 광대역 CDMA용으로 제안되고 있는 유한체 GF(28) 상의 3중 오류정정 (47, 41) Reed-Solomon 복호기를 설계하였다. 복호법으로는 오류정정 능력이 비교적 작은 경우 매우 효율적인 직접복호법을 이용하였다. 설계된 복호기는 복호지연이 매우 짧으며 기존의 복호기보다 훨씬 간단한 하드웨어로 구현할 수 있는 장점을 가지고 있다.

• 대한전자공학회논문지TC
• /
• 제42권11호
• /
• pp.13-20
• /
• 2005

현대의 디지털통신기기나, 오디오/비디오 전자기기엔 항상 비바이나리 에러정정복부호기가 사용되는데 그중 필수적으로 사용되는 Reed-Solomon 복부호화기기의 설계에 대해 기술했다. 2,3 symbol RS 복호기설계법을 설명 후, 새로운 RS 부호화기의 설계법을 제시한다. 각각의 복부호화기기의 동작여부를 예를들어 test해보고 잘 동작함을 확인했다.

• Journal of Microbiology
• /
• 제43권6호
• /
• pp.572-576
• /
• 2005

This study focused on detecting catabolic genes for polycyclic aromatic hydrocarbons (PAHs) distributed in the reed rhizosphere of Sunchon Bay, Korea. These marsh and mud environments were severely affected by human activities, including agriculture and fisheries. Our previous study on microbial roles in natural decontamination displayed the possibility that PAH-degrading bacteria, such as Achromobacter sp., Alcaligenes sp., Burkholderia sp. and Pseudomonas sp. play an important decontamination role in a reed rhizosphere. In order to gain further fundamental knowledge on the natural decontamination process, catabolic genes for PAH metabolism were investigated through PCR amplification of dioxygenase genes using soil genomic DNA and sequencing. Comparative analysis of predicted amino acid sequences from 50 randomly selected dioxygenase clones capable of hydroxylating inactivated aromatic nuclei indicated that these were divided into three groups, two of which might be originated from PAH-degrading bacteria. Amino acid sequences of each dioxygenase clone were a part of the genes encoding enzymes for initial catabolism of naphthalene, phenanthrene, or pyrene that might be originated from bacteria in the reed rhizosphere of Sunchon Bay.

• 설비공학논문집
• /
• 제4권3호
• /
• pp.163-174
• /
• 1992

This paper presents numerical and experimental methods of investigating dynamic characterisics of reed valves of hermetic reciprocating compressors. For the natural frequency, two different techniques have been tried : microphone method and strain gage method. In the microphone method, acoustic pressure signals from excited valves have been analyzed, while signals of tiny strain gauge attached on the reed valves have been utilized in the strain gage method. The empirically determined natural frequencies have been compared to the ones calculated by finite element method. Reasonably good agreements between the experimental and numerical results have been found, implying that the natural frequencies of reed valves could be obtained by FFM alone with enough accuracy.

• 전자공학회논문지C
• /
• 제34C권12호
• /
• pp.43-53
• /
• 1997

In this paper, the optimal synthesis algorithm of multiple-valued logic circuits using universal logic modules (ULM) U$_{f}$ based on 3-variable ternary reed-muller expansions is presented. We check the degree of each varable for the coefficients of reed-muller expansions and determine the order of optimal control input variables that minimize the number of ULM U$_{f}$ modules. The order of optimal control input variables is utilized the realization of multiple-valued logic circuits to be constructed by ULM U$_{f}$ modules based on reed-muller expansions using the circuit cost matrix. This algorithm is performed only unit time in order to search for the optimal control input variables. Also, this algorithm is able to be programmed by computer and the run time on programming is O(p$^{n}$ ).

• 반도체디스플레이기술학회지
• /
• 제13권4호
• /
• pp.7-13
• /
• 2014

In this paper, an area-efficient degree-computationless modified Euclidean (DCME) algorithm is presented and implemented for high-speed Reed-Solomon (RS) decoder. The DCME algorithm can be used to solve the key equation in Reed-Solomon decoder to get the error location polynomial and the error value polynomial. A pipelined recursive structure is adopted for reducing the area of key equation solver (KES) block with sacrifice of an amount of decoding latency. For comparisons, KES block for RS(255,239,8) decoder with the proposed architecture is implemented using Verilog HDL and synthesized using Synopsys design tool and 65nm CMOS technology. The synthesis results show that the proposed architecture can be implemented with less gate counts than other existing DCME architectures.