• 대한한의학방제학회지
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• 제17권2호
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• pp.1-20
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• 2009

The purpose of this study was to examine how exterior-relieving herbs are blended by each prescription with emphasis on Internal disease range of Donguibogam by limiting Wind herbs in exterior-relieving herbs to apply exterior-relieving herbs to internal diseases. Prescriptions mixed with exterior-relieving herbs is a prescription adding Bojungikgitang, Yijintang, Yimyosan, Yukilsan and Gilgyeongjigaktang. The mixed exterior-relieving herbs were diversely operated according to each prescription or medicines. However, the mixed exterior relieving herbs were mixed for rising yang & tonifying qi(升陽益氣) for the most part. The exterior-relieving herbs mixed with prescriptions had the total 15 kinds, Bupleuri Radix, Cimicifugae Rhizoma among them were mixed with prescriptions for the most part. In addition, two-kind mixed exterior-relieving herbs were utilized in order of Bupleuri Radix Cimicifuga Rhizoma and Bupleuri Radix Cimicifugae Rhizoma Notopterygii Rhizoma Ledebouriellae Radix. Taken together, Wind herbs is applied several purpose, so that it can contribute to treatment and prevention of internal diseases in present-day.

• 전자공학회논문지
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• 제54권7호
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• pp.29-35
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• 2017

본 논문에서는 고속 데이터 전송을 위해 orthogonal frequency division multiplexing (OFDM) 시스템에 적용 가능한 고속 fast Fourier transform (FFT) 프로세서를 제안하였다. 제안하는 FFT 프로제서는 높은 처리율을 만족하기 위해 mixed-radix 알고리즘과 8개의 병렬 경로를 가지는 multipath delay commutator (MDC) 파이프라인 구조를 채택하였다. 하드웨어 복잡도를 줄이기 위해서 새로운 스케줄링 기법들을 적용하여 twiddle factor 연산을 위한 read-only memories (ROM)의 크기를 줄이는 구조와 복소 상수 곱셈기의 수를 줄이는 구조를 제안한다. 제안하는 구조는 지연 소자와 연산 사이클의 증가 없이 하드웨어 복잡도를 줄일 수 있다. 또한, IEEE 802.11 ac/ad와 같은 고속 OFDM 시스템을 위해 64/128/256/512-포인트 FFT 연산이 가능하다. 제안하는 FFT 프로세서는 Verilog-HDL로 모델링하여 Samsung 65nm 공정 라이브러리로 합성하여 0.36mm2의 면적과 330MHz의 동작 주파수에서 2.64 GSample/s를 보이고 있다.

• 정보학연구
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• 제4권4호
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• pp.51-63
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• 2001

잉여수계(Residue Number System)는 각 모듈러스에 자리올림수의 전달이 필요 없고, 병렬 구조를 이루므로, 디지털 신호처리 및 신경망 처리기와 같은 전용 프로세서 설계에서 사용된다. 그러나, 크기 비교 및 부호 검출시에 혼합기수변환(Mixed Radix Conversion)이 요구되며, 이는 전체 연산 속도를 저해하는 요인이 된다. 그러므로 본 논문에서는 혼합기수 변환의 속도를 향상시키기 위하여 잉여수 분할 방법을 개선한 혼합기수변환기를 설계하였다. 설계된 변환기는 기존의 변환기에 비하여 연산기의 크기는 증가하지만 연산시간은 최대 2배가 향상되었다.

• JSTS:Journal of Semiconductor Technology and Science
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• 제17권1호
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• pp.101-109
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• 2017

This paper presents a high-throughput low-complexity 512-point eight-parallel mixed-radix multipath delay feedback (MDF) fast Fourier transform (FFT) processor architecture for orthogonal frequency division multiplexing (OFDM) applications. To decrease the number of twiddle factor (TF) multiplications, a mixed-radix $2^4/2^3$ FFT algorithm is adopted. Moreover, a dual-path shared canonical signed digit (CSD) complex constant multiplier using a multi-layer scheme is proposed for reducing the hardware complexity of the TF multiplication. The proposed FFT processor is implemented using TSMC 90-nm CMOS technology. The synthesis results demonstrate that the proposed FFT processor can lead to a 16% reduction in hardware complexity and higher throughput compared to conventional architectures.

• ETRI Journal
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• 제32권1호
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• pp.1-10
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• 2010

In this paper, we present a fast Fourier transform (FFT) processor with four parallel data paths for multiband orthogonal frequency-division multiplexing ultra-wideband systems. The proposed 128-point FFT processor employs both a modified radix-$2^4$ algorithm and a radix-$2^3$ algorithm to significantly reduce the numbers of complex constant multipliers and complex booth multipliers. It also employs substructure-sharing multiplication units instead of constant multipliers to efficiently conduct multiplication operations with only addition and shift operations. The proposed FFT processor is implemented and tested using 0.18 ${\mu}m$ CMOS technology with a supply voltage of 1.8 V. The hardware- efficient 128-point FFT processor with four data streams can support a data processing rate of up to 1 Gsample/s while consuming 112 mW. The implementation results show that the proposed 128-point mixed-radix FFT architecture significantly reduces the hardware cost and power consumption in comparison to existing 128-point FFT architectures.

• 동의생리병리학회지
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• 제19권2호
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• pp.475-480
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• 2005

This study is designed to find out the effect of Corydalidis Tuber Carthami Flos Paeoniae Radix Rubra mixed water extract on adjuvant arthritis, and to check the stability for Corydalidis Tuber Carthami Flos Paeoniae Radix Rubra mixed water extract about the liver. At first, rats were devided into four groups; Normal(Non-treated group with FCA), Control(Group administrated saline everyday for 1 week after treatment of FCA), Sample A(group administrated Corydalidis Tuber Paeoniae Radix Rubra Carthami Flos mixed water extract $9mg/200{\sim}220g$ everyday 1 week after treatment of FCA) and Sample B(Group administrated Corydalidis Tuber Paeoniae Radix Rubra Carthami Flos mixed water extract $18mg/200{\sim}220g$ everyday 1 week after treatment of FCA). After then, separated searches were made on the change of edema rate, the number of WBC, the contented quantities of total protein, total bilirubin, GOT, GPT in the serum. Result : In the right planter edema, both of Sample groups showed a decrease with statistical significance in comparison with control group. In the WBC count, Sample B group showed a decrease with statistical significance in comparison with control group and also sample A group showed a decrease, but did not show statistical significance. In the serum total protein, both of samples did not show statistically significant decrease in comparison with the control group. In the serum total bilirubin, GOT and GPT, both of samples did not show any harmful change about the liver in comparison with the control group. According to the above results, it is concluded that Corydalidis Tuber Paeoniae Radix Rubra Carthami Flos mixed water extract had the therapeutic effect of anti-inflammation in adjuvant arthritis with no injury to liver.

• 동의생리병리학회지
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• 제21권2호
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• pp.479-484
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• 2007

The purpose of this research was to investigate effects of mixed extract of Ginseng Radix and Angelicae gigantis Radix on activity of murine splenocytes and macrophages. GAE (300 mg/kg) was administered p.o. for 7 days. GAE decreased the viability of murine splenocytes in vivo. Also, GAE enhanced the population of $Thy1^+$ cells in splenocytes and the population of splenic $CD4^+$ cells. Furthermore, GAE increased the production of ${\Upsilon}$-interferon from splenocytes. GAE enhanced the production of nitric oxide and the phagocytic activity of peritoneal macrophages. These results suggest that GAE regulates the immune response via activation of splenic Th1 cells and peritoneal macrophages.

• 대한임베디드공학회논문지
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• 제6권4호
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• pp.243-248
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• 2011

A FFT/IFFT processor is the key component for orthogonal frequency division multiplexing (OFDM) systems based IEEE 802.11n wireless local area network (WLAN). There exists many radix algorithms according to the structure of butterfly as FFT sub-module, each has the pros and cons on hardware complexity. Here, mixed radix algorithms for 64 and 128 FFT/IFFT processors are proposed, which reduce hardware complexity by using mixture of radix-23 and radix-4 algorithms. The proposed algorithm finish calculation within 3.2${\mu}s$ in order to meet IEEE 802.11n standard requirements and it has less hardware complexity compared with conventional algorithms.

• 한국자기학회지
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• 제22권2호
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• pp.33-36
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• 2012

1968년에 발표된 구식 싱글턴 혼합기수 고속푸리에 변환 포트란 서브루틴에 존재하는 일반적인 $N$ 문제에 대한 간단한 처치법을 제안하였다. 주어진 문제에 대한 간략한 검토를 마친 후에, 새로운 처치법을 동적메모리 할당방법의 입장에서 최악상황분석법을 통해 논의하였다. 본 논의를 통해 여기서 제시된 프로그래밍 기법은 최소한 다차원 데이터 집합에 대해 지금까지 제시된 여타 처치법보다 우월함을 보였다.

• 한국약용작물학회지
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• 제8권2호
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• pp.109-116
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• 2000

115 종의 생약재 중에서 식품부패성 및 병원성 미생물을 대상으로 항균활성을 나타내는 생약자원을 검색한 결과 식품부패성 세균 Bacillus subtilis에 강한 항균활성을 보인 것은 단삼, 관중, 가자, 독활, 파고지, 오미자이었으며, 식중독균인 효모 Candida albicans IFO6258에 대해서는 지모와 관중 두 생약재가, 식품부패성 효모 Schizosaccharomyces sp.에 대해서는 지모, 관중, 원지가 각각 강한 항균 활성을 보였다. Streptococcus mutans에 대해서는 관중, 단삼, 소목, 방기, 오미자, 오배자, 고삼, 목향이 강한 항균 활성을 보였다. 피부 각층 및 모발에 침입하여 피부병을 야기하는 백선균 Trichonphyton mentagrophytes에 대해서는 지모, 강황, 목향, 호장근, 지유, 황금, 가자들이 항균활성을 나타내었다 . 항균spectrum이 넓으면서 비교적 항균활성이 강한 관중, 단삼, 가자, 황금에 항균활성이 강한 생약자원인 가자, 계피, 방기, 황금등의 생약재를 각각 1 : 1로 혼합한 추출물에 대한 항균활성을 조사한 결과 모든 혼합 추출물에서 단독 추출물 보다 강한 항균활성을 나타내었다.