• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 하계종합학술대회 논문집(2)
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• pp.173-176
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• 2002

This paper is about a high-speed MAC (multiplier and accumulator) design applying radix-4 and radix-8 Booth's algorithm at the same time. The optimized hybrid radix design for high speed MAC has taken advantage of both a radix-4 and a radix-8 architectures. A radix-4 architecture meets high-speed, but it takes much more power and chip area than a radix-8 architecture. A radix-8 architecture needs less power and chip area than the other, but it has a bottleneck of generating three times the multiplicand problem. An optimized hybrid architecture performs the radix-4 multiplication partially in parallel with the generation of three times the multiplicand for use of the radix-8 multiplication. It reduces the concerned bit width of multiplier in radix-8 multiplication.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 하계종합학술대회 논문집(1)
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• pp.125-128
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• 2002

This paper is about a high-speed MAC (multiplier and accumulator) design applying radix-4 and radix-8 Booth's algorithm at the same time. The optimized hybrid radix design for high speed MAC has taken advantage of both a radix-4 and a radix-8 architectures. A radix-4 architecture meets high-speed, but it takes much more power and chip area than a radix-8 architecture. A radix-8 architecture needs less power and chip area than the other, but it has a bottleneck of generating three times the multiplicand problem. An optimized hybrid architecture performs tile radix-4 multiplication partially in parallel with the generation of three times the multiplicand for use of tile radix-8 multiplication. It reduces the concerned bit width of multiplier in radix-8 multiplication.

• 한국통신학회논문지
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• 제25권4A호
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• pp.546-552
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• 2000

터보부호의 복호기는 두 개이상의 연판정 입출력이 가능한 복호기로 구성되며, 이러한 복호기는 일정길이의 비트열에서 최적의 사후확률(a posteriori robability)을 이용한 MAP(maximum-a-posteriori) symbol estimator를 이용한다. 기존의 radix-2 MAP복호기는 아주 큰 인터리버 블록 크기로 인해 고속 통신시스템의 적용에는 문제점이 있다. 따라서 본 논문에서는 인터리버 블록크기를 줄일 수 있는 radix-2 MAP복호기를 기바으로 하는 새로운 radix-4 MAP복호기를 제안하였다. Radix-4 MAP 복호기 구조에 적용하기 위해 순방향, 역방향 state metric과 채널 metric을 제안하였으며, 가우시안 채널에서 기존의 radix-2 기반의 MAP 복호기와 성능을 비교하였다.

• 생약학회지
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• 제16권2호
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• pp.81-92
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• 1985

The Polygoni Radix and Cynanchi Radix have been used to potentiate the liver functions in clinic of Oriental Medicine. The water extracts of Polygoni Radix and Cynanchi Radix were administered orally to rats intoxicated with carbon tetrachloride and then this experiment have been performed by observing liver fatty degeneration and activities of enzymes such as cytochrome oxidase (CYO), adenosine triphosphatase (ATP), acid phosphatase (ACP), lactate dehydrogenase (LDH) and alkaline phosphatase (ALP). By oral administration of water extracts of the radices between 1 and 10 days, the following results were obtained. 1. The group given Cynanchi Radix extract showed recovery of the fat liver in 4 days, whereas that given Polygoni Radix extract did the recovery in 8 days. 2. In cytochrome oxidase activity, the group given Cynanchi extract showed normal activity in 6 days, whereas that given Polygoni Radix extract did the activity in 8 days. 3. In adenosine triphosphatase activity, the groups given Cynanchi Radix and Polygoni Radix extracts showed normal activities in 2 and 8 days, respectively. 4. In acid phosphatase activity, the groups given Cynanchi Radix and Polygoni Radix extracts showed recovery of the activities in 2 and 4 days, respectively. 5. In lactate dehydrogenase activity, the group given Cynanchi Radix and Polygoni Radix extracts showed recovery of the activities in 6 and 10 days, respectively. 6. In alkaline phosphatase activity, the group given Cynanchi Radix extract showed normal activity in 2 days, whereas that given Polygoni Radix extract showed slight recovery between 4 and 6 days followed by decrease of the activity in 8 and 10 days. From the above-mentioned results, it was found that both of the water extracts of Polygoni and Cynanchi Radix possessed the recovery action of liver function as intoxicated with carbon tetrachloride in rats. It is also noted that the extract of Cynanchi Radix showed more potent activity than that of Polygoni Radix.

• 대한전자공학회논문지SP
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• 제44권5호
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• pp.84-93
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• 2007

이 논문에서는 고속 FFT 구현을 위한 Radix-8 구조를 제안한다. 제안 FFT 구조의 핵심은 Radix-8 DIF(Decimation In Frequency) 나비연산기 구조이다. Radix-8 알고리즘은 고속처리는 가능하나 구현면적이 증가하는 단점이 있는데, 제안 구조는 곱셈연산을 DA(Distributed Arithmetic) 방식을 사용하여 구현함으로써 구현 면적이 증가하는 것을 줄일 수 있었다. 64-point FFT에 대하여 기존의 Radix-4 나비연산기와 제안된 Radix-8 나비연산기를 각각 사용하여 구현한 결과 구현면적이 49.2%가 증가하였다. 즉, Throughput을 2배로 증가시키기 위하여 하드웨어는 49.2%만 증가함을 Verilog-HDL 코딩을 통하여 확인하였다. 또한 기존 구조와 제안 구조가 같은 Throughput을 얻는 경우에는 전력소모가 25.4%가 감소하게 된다. 따라서 제안된 나비연산기를 사용하는 FFT 구조는 고속/저전력 FFT를 필요로하는 OFDM용 통신단말기에 사용될 수 있다.

• 대한한의학방제학회지
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• 제18권2호
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• pp.1-14
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• 2010

This report describes 57 prescriptions including Paeoniae Radix and Glycyrrhizae Radix in Dongeuibogam. Paeoniae Radix and Glycyrrhizae Radix have been used separately or concurrently in Oriental Medicine for a long time as a treatment for various disease. The following conclusions are reached through investigations on the applications of prescriptions including Paeoniae Radix and Glycyrrhizae Radix in Dongeuibogam. 1. 7 times(12.3%) prescriptions are recorded in women chapter, 6 times(10.5%) in cold chapter, 5 times(8.8%) in stool chapter and fatigue chapter each, 4 times(7.0%) in psychiatry chapter, which are arranged in order of frequency. 2. Anxiety, Yin-Yang deficiency, stroke, treating blood, cataract, fever floating due to Yin deficiency, weak and fatigue, pregnancy, abortion, women accessary disease, cold-feeling heart pain, stiffness, etc, among 51 symptoms in prescriptions including Paeoniae Radix and Glycyrrhizae Radix. 3. The dosage of Paeoniae Radix and Glycyrrhizae Radix are from 5 pun:2.5 pun to 2 nyang:1 nyang. 1 jeon:5 pun is recored 39 times(68.4%), 2 jeon:1 jeon and 1 nyang:5 jeon is 6 times(3.21%), 2 nyang:1 nyang is 2 times(1.8%) used among 57 prescriptions including Paeoniae Radix and Glycyrrhizae Radix. 4. 57 prescriptions including Paeoniae Radix and Glycyrrhizae Radix are mostly composed of Samooltang and Sagoonjatang, Gyejitang, Gamgiltang, Bowontang, Goongguitang, Jeongwoneum, Bojoongikgitang, Jigoongsan, Ijintang, Pyeongwuisan, Oryungsan, etc, according to the usage.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2007년도 하계종합학술대회 논문집
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• pp.85-86
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• 2007

In this paper, a Radix-8 structure for high-speed FFT is proposed. Even throughput of the Radix-8 FFT is twice than that of the Radix-4 FFT, implementation area of the Radix-8 is larger than that of Radix-4 FFT. But, implementation area of the proposed Radix-8 FFT was reduced by using DA(Distributed Arithmetic) for multiplication. The Verilog-HDL coding results for the proposed FFT structure show 49.2% cell area increment comparison with those of the conventional Radix-4 FFT structure. Namely, to speed up twice, 49.2% of area cost is required. In case of same throughput, power consumption of the proposed structure is reduced by 25.4%.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2000년도 추계종합학술대회 논문집(2)
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• pp.297-300
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• 2000

This paper proposes a high-speed and area-efficient FFT algorithm and performs a hardware implementation. This algorithm, named by “Radix-4/2”, uses the feature of existing radix-2$^3$algorithm, It reduces the number of non-trivial multipliers in SFG to the ratio of 3 to 2 campared with radix-2 or radix-4 algorithm and radix-4/2 has also twice throughput as radix-2$^3$algorithm's. It is proved that FFT processor using the proposed algorithm and 64-point MDC pipeline architecture has twice throughput as radix-2$^3$algorithm's, and reduces areas by 25 percentages in contrast to radix-4 algorithm's.

• 대한한의학회지
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• 제17권1호
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• pp.111-131
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• 1996

For the development of antimetastatic agent 41 kinds of crude drugs were used for the evaluation of inhibitory effect of several crude drugs on cell adhesion of pulmonary cancer cells and platelet aggregation. Results were obtained as follows: 1. Water extracts of crude drugs inhibited cell adhesion of A549 to complex extracelluar matrix over 40 % of contol were Houttuyniae Herba, Mylabris, Rhei Radix et Rhizoma, Meliae Cortex, Ferula Resina, Oldenlandiae diffusae Herba at the higher concentration of $10^{-3}g／ml$ while those inhibiting cell adhesion of Bl6-Fo over 40 % of control were $10^{-5}g／ml$ of Houttuyniae Herba, Aurantii Fructus, Lithospermi Radix, Zedoariae Rhizoma. Prunellae Spica, Foeniculi Fructus, Rbei Radix, Scutellariae Radix, Meliae Cortex, Ferula Resina and Oldenlandiae diffusae Herba. 2. MeOH extracts of crude drugs at the concentration of $4{\times}10^{-4}g／ml$ inhibiting cell adhesion of A549 specifically to single extracelluar matrix over 40 % of control were Lithospermi Radix, Agrimoniae Herba, Rhei Radix and Ferula Resina to collagen I, Houttuyniae Herba, Lithospermi Radix, Bupleuri Radix, Salviae miltiorrhizae Radix, Orostachys Herba, Sappan Lignum, Meliae cortex ferula Resina and Coicis Semen to collagen Ⅳ, Mylabris, Agrimoniae Herba to laminin, Houttuyniae Herba and Meliae Cortex to fibronectin. 3. NeOH extracts of crude drugs at the concentration of $4{\times}10^{-4}g／ml$ inhibiting cell adhesion of B16-Fo specifically to single extracelluar matrix over 60 % of control were Lithospermi Radix, Salviae miltiorrhizae Radix, Meliae Cortex and Ferula Resina to collagen I, Lithospermi Radix, Bupleun Radix, Saiviae miltiorrhizae Radix, Ferula Resina and Acanthopanacis Cortex to collagen Ⅳ, Bupleuri Radix, Orostachys Herba to laminin, Houttuyniae Herba to fibronectin. 4. MeOH extracts of crude drugs inhibiting platelet aggregation over 40% of ADP control were at the concentration of $50{\mu}g/m{\ell}$ of Houttuyniae Herba, Angilicae gigantis Radix, Zedoariae Rhizoma. Coicis Semen and $100{\mu}g/m{\ell}$ of Ferula Resina, Orostachys Herba, Salviae miltiorrhizae Radix, Curcumac Radix, Carthami Flos, Lithospermi Radix, Gleditsiae Spina, Sappan Lignum, Acanthopanacis Cortex. These results suggest that several crude drugs including Ferula Resina, Houttuyniae Herba, Lithospermi Radix and Salviae miltiorrhizae Radix chiefly have more possibility to exert antimetastatic activity and require in vivo antimetastatic study.

• 한국통신학회논문지
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• 제26권6B호
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• pp.856-866
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• 2001

본 논문에서는 radix-4 방식을 이용한 고속 터보 MAP 복호 알고리즘을 제안하고 이를 설계하기 위해 VHDL 모델링 하였다. VHDL 시뮬레이션을 하기 위해 radix-4 방식의 터보 MAP 복호기의 구조를 설계하였으며, 복호속도 효율성을 분석하기 위해 기존의 Radix-2 방식의 복호기도 VHDL 시뮬레이션 하였다. 구현 결과, 약 2.4배의 복호속도 향상을 알 수 있었다.