• 환경생물
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• 제23권4호
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• pp.343-356
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• 2005

A pictorial key to total 46 species belonging to 15 genera of two subfamilies in the family Cyclopidae is provided as a result of the serial researches on the freshwater cyclopoid copepods in South Korea.

• 대한전자공학회논문지SD
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• 제45권10호
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• pp.23-30
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• 2008

최근 페어링 기반의 암호시스템에 대한 연구가 활발히 진행되고 있으며, 암호시스템의 효율성은 기존의 공개키 암호시스템과 같이 유한체에 의존한다. 페어링 기반의 암호시스템의 경우 주로 GF($3^m$)에서 고려되며 유한체 연산에서 곱셈 연산이 효율성에 가장 큰 영향을 미친다. 본 논문에서는 삼항 기약다항식 기반의 새로운 GF($3^m$) MSD-first Digit-Serial 곱셈기를 제안한다. 제안하는 MSD-first Digit-Serial 곱셈기는 모듈러 감산 연산부를 병렬화하여 공간복잡도는 기존의 결과와 거의 같으나 Critical Path Delay가 기존의 1MUL+(log ${\lceil}n{\rceil}$+1)ADD에서 1MUL+(log ${\lceil}n+1{\rceil}$)ADD으로 감소한다. 따라서 Digit이 $2^k$가 아닌 경우 1번의 덧셈에 대한 시간 지연이 감소한다.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2005년도 춘계종합학술대회
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• pp.928-930
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• 2005

With an increasing importance of the information security issues, the efficienct calculation process in terms of finite field level is becoming more important in the Elliptic curve cryptosystems. Serial multiplication architectures are based on the Mastrovito's serial multiplier structure. In this paper, we manipulate the numerical expressions so that we could suggest a 3-times as fast as (3x) the Mastrovito's multiplier using the polynomial basis. The architecture was implemented with HDL, to be evaluated and verified with EDA tools. The implemented 3x GF (Galois Field) multiplier showed 3 times calculation speed as fast as the Mastrovito's, only with the additional partial-sum generation processing unit.

• Asian Pacific Journal of Cancer Prevention
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• 제17권3호
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• pp.1149-1155
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• 2016

Background: Examination of sentinel lymph node (SLN) biopsies provides accurate nodal staging for breast cancer and plays a key role in patient management. Procurement of SLNs and the methods used to process specimens are equally important. Increasing the level of detail in histopathological examination of SLNs increases detection of metastatic tumours but will also increase the burden of busy laboratories and thus may not be carried out routinely. Recommendation of a reasonable standard in SLN examination is required to ensure high sensitivity of results while maintaining a manageable practice workload. Materials and Methods: Twenty-four patients with clinically node-negative breast cancer were recruited. Combined radiotracer and blue dye methods were used for identification of SLNs. The nodes were thinly sliced and embedded. Serial sectioning and immunohistochemical (IHC) staining against AE1/AE3 were performed if initial H&E sections of the blocks were negative. Results: SLNs were successfully identified in all patients. Ten cases had nodal metastases with 7 detected in SLNs and 3 detected only in axillary nodes (false negative rate, FNR=30%). Some 5 out of 7 metastatic lesions in the SLNs (71.4%) were detected in initial sections of the thinly sliced tissue. Serial sectioning detected the remaining two cases with either micrometastases or isolated tumour cells (ITC). Conclusions: Thin slicing of tissue to 3-5mm thickness and serial sectioning improved the detection of micro and macro-metastases but the additional burden of serial sectioning gave low yield of micrometastases or ITC and may not be cost effective. IHC validation did not further increase sensitivity of detection. Therefore its use should only be limited to confirmation of suspicious lesions. False negative cases where SLNs were not involved could be due to skipped metastases to non-sentinel nodes or poor technique during procurement, resulting in missed detection of actual SLNs.

• 한국정보통신학회논문지
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• 제10권2호
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• pp.344-352
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• 2006

자동으로 암호문과 평문의 수신이 가능한 팩시밀리용 암호통신시스템을 개발하였다. 개발된 암호시스템은 128bit SEED알고리즘을 적용하였으며 1024bit 모듈러, 256bits Exponent의 Diffie-Hellman 키교환방식을 적용하였다. 암호문 고속 전송을 위해 Dual FAX Server를 개발함으로써 실시간 암호통신을 구현하였다. Diffie-Hellman 키교환 시 등록된 시리얼번호를 서로 교환시켜 안전한 키 교환이 가능하게 하였다.

• Journal of Plant Biology
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• 제29권2호
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• pp.135-143
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• 1986

The distributional pattern of the bast fibres strands or bundles in the stems of Sida species represented in Nigeria is studied. Three major patterns of arrangement are recognized, namely aggregation of fibre strands into units with wedge-shaped, or triangular, rectangular, rhomboidal, square and trapezoid outlines; serial arrangement of fibre strands into rings or circular, ovoid, semi-circular or crescentic rows; and intermediate pattern in which both fibre strands-aggregates and serial rows of strands patterns are combined. The first pattern is found in S. linifolia, S. urens and S. scabrida, the second in S. cordifolia, S. pilosa, S. ovata, S. rhombifolia and S. spinosa, and the third in S. garckeana, and S. acuta. A dichotomous key based on these features is presented. Dimensional characteristics of the bast fibre cells are also given.

• Asian-Australasian Journal of Animal Sciences
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• 제29권10호
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• pp.1500-1507
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• 2016

Myostatin (MSTN) can negatively regulate the growth and development of skeletal muscle, and natural mutations can cause "double-muscling" trait in animals. In order to block the inhibiting effect of MSTN on muscle growth, we transferred zinc-finger nucleases (ZFN) which targeted sheep MSTN gene into cultured fibroblasts. Gene targeted colonies were isolated from transfected fibroblasts by serial dilution culture and screened by sequencing. Two colonies were identified with mono-allele mutation and one colony with bi-allelic deletion. Further, we introduced the MSTN-ZFN mRNA into sheep embryos by microinjection. Thirteen of thirty-seven parthenogenetic embryos were targeted by ZFN, with the efficiency of 35%. Our work established the technical foundation for generation of MSTN gene editing sheep by somatic cloning and microinjection ZFN into embryos.

• 자연과학논문집
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• 제4권
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• pp.11-22
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• 1991

Early studies on Korean Sargassum subjenus Bactrophycus were partly started by Kyetzubg(1843,1849), J. Agardh(1889), Cotton(1906), Yendo(1907) and Okamura(1913, 1914, 1915, 1917). Kang(1966) reported 15 species and 4 subspecies of Sargassum subgenus Bactrophycus and their wide distribution on the Korean coasts in his paper [On the geographical distribution of marine algae in Korea], a foundation stone of Korean phycology. In fact, all the Korean coasts and subtidal zone are inhabited by Sargassum plants. They constitute the most part of the primary production and dominant species of benthic algal vegetation. In 1974, L.K. Lee began to study Sargassum monographically as seaweed resources in Korea. The Koreans eat some species of Sargassum (including Hizikia fusiformis) or use them as fertilizer of the farm near the coast. Among the reported 17 species of Korean Fucales, 12 species belong to Bactrophycus. Yoo(1976) dealt with the descriptions, figures, and a key of 24 species of Korean Fucales plants in her M.S. thesis paper. Among them 16 species belonged to Bactrophycus. Even though the above two works were done with thorough observation of the dry specimens kept in the Pusan Fisheries University Herbarium (most of them were identified by Kang, J.W.) and nation-wide collections, great morphological varieties of these taxa made Lee and Yoo hesitate to publish the paper. Instead, the serial chemotaxonomic studies on the geographical variations of Korean Fucales plants(Yoo and Lee, 1988a, 1988b ; Yoo, et al., 1988) were held to solve the problem, while foreign papers (especially both Drs Tseng's and Yoshida's serial works on Bactrophycus). and authenthic specimens that foreign scholors sent to Korean phycologists induced them to find that several species of Sargassum had been misidentified from the beginning. We introduce here Korean Sargassum subgenus Bactrophycus according to Tseng et al. (1985), mentioning briefly the characteristics of the species, key, and distribution on the Korean coasts.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 하계종합학술대회 논문집(2)
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• pp.345-348
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• 2002

This paper presents new fast scalar multiplier of elliptic curve cryptosystem that is regarded as next generation public-key crypto processor. For fast operation of scalar multiplication a finite field multiplier is designed with LFSR type of bit serial structure and a finite field inversion operator uses extended binary euclidean algorithm for reducing one multiplying operation on point operation. Also the use of the window non-adjacent form (WNAF) method can reduce addition operation of each other different points.

• 한국우주과학회:학술대회논문집(한국우주과학회보)
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• 한국우주과학회 1993년도 한국우주과학회보 제2권2호
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• pp.23-23
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• 1993

과학로케트에 탑재되는 x-선 검출기에서 검출되는 2 kev 에서 10 kev 사이의 x-선 신호를 분석하여 데이터를 얻고, 전송하기 위한 피로를 설계하고 제작하였다. 신호처리회로의 전체적인 구성은 2 - 10 key의 x-선 에너지 및 event time을 측정하는 회로 및8-선 계수율을 측정하기 위한 카운터회로를 위주로 설계하였으며, x-선 event의 에너지가 측정에너지를 벗어나거나 상승시간이 긴 신호는 anti-coincidence 회로를 통하여 제거되고, 그 계수율이 기록되도록 설계 제작되었다. 또한 신호처리회로에서 얻은 데이터는 telemetry를 통하여 serial 형태로 전송되어야 하므로 8086 microprocessor를 이용하여 데이터를 획득하고 전송하도록 하였다. 따라서 본 실험에서 제작된 신호처리회로의 기능 및 특성에 대해 논하고자 한다.