중국금융시장에 대한 연구

이한재,박철범,최영수 조선대학교 경영경제연구소 2001 經營經濟硏究 = Management and economics research Vol.24 No.1

교란대기채널에서 길쌈부호를 이용한 광무선통신의 성능분석

이광열,김재평,김영권 건국대학교 산업기술연구원 1998 건국기술연구논문지 Vol.23 No.-

The fluctuations in amplitude and phase of optical signal through the atmosphere occur due to the turbulene. This fading often results in unacceptably large bit error probabilities and thus performance degradation of wireless optical communications. One obvious way to improve the reliability of this type of communication system is through the use of error-correcting codes. In this paper, the equipment of measuring the turbulence strength and IM/DD(Intensity Modulation/Direct Detection) communication system are made to measure the performance of the wireless optical communications through the turbulent atmosphere. The results of the measurements presented here indicate that the use of (2,1,6) convolutional code and hard-decision Viterbi decoding can yield 1 ∼ 2 [dB] coding gain in turbulent atmosphere giving rise to bit error probability of 10³∼10(-5).

圓佛敎 結婚敎役者의 家庭生活에 對한 考察

이영재 圓光大學校 圓佛敎學硏究會 1987 圓佛敎學硏究 Vol.17 No.-

남원시 초등학생 및 병설유치원생의 머릿니 구제사업(1995)

이규재,안영겸 한국농촌보건회 1997 농촌의학·지역보건 Vol.22 No.1

LILI-128 암호의 고속화 방안 및 FPGA 구현에 관한 연구

이훈재,박영민,류명춘 경운대학교 산업기술연구소 2001 産業技術硏究論文誌 Vol.3 No.2(A)

Because LILI-128 cipher is a clock-controlled keystream generator, it makes the keystream data degrade in a speed for clock-synchronized hardware logic design: The clock-controlled LFSR_d in LILI-128 cipher requires 1∼4 times higher system clock, that is the reason why the system throughput in data rate is lower if the same clock were selected and that is the structural problem in principle. In this paper, we propose the solution to 4-bit parallel LFSR_d that each register bit has four variable data routines to feedback or shift in LFSR_d. Finally, we simulates the timing of the design on Max+plus Ⅱ of ALTERA Co., implements the logic circuit to the FPGA device (EPF10K20RC240-3), and analyses the stability on throughput to 50 Mbps rate (we choose a higher speed than T3 rate, 45 Mbps and the maximum delay routine in our design is below 20ns) under the 50㎒ system clock. For example, Lucent technologies ASIC can achieve the throughput about 500 Mbps if the maximum delay routine were 1.8㎱ at a 0.13 ㎛ semiconductor.

경골어류 카라신과 glow-light tetra의 난자형성과정

이규재,장병수,등영건,김동희 韓國電子顯微鏡學會 2008 Applied microscopy Vol.38 No.4

조기어강 (Actinopterygii), 카라신목 (Characiformes), 카라신과(Characidae)에 속하는 담수산 경골어류에 속하는 Glow-light tetra (Hemigrammus erythrozonus)의 난자형성과정을 다른 어류와의 차이점을 확인하기 위하여 광학현미경으로 관찰한 결과 난원세포의 세포질은 호염기성이었고 핵 내에 다수의 이형염색질들이 분포하고 있었다. 제1난모세포의 경우 난황포가 단지 난세포 가장자리에만 배열되어 있었고 난막의 형성은 관찰되지 않았다. 제2난모세포에서는 난막이 형성되었고 제1난모세포에 비해서 난황포가 점점 핵 쪽으로 증식된 경향을 보였다. 발생이 진행됨에 따라서 호염기성 물질들은 점점 감소하는 경향을 보였고 후에 난막 주위에만 국한적으로 분포하였으며, 난막의 두께와 난자의 크기는 점점 증가되었다. 이상과 같이 glow-light tetra의 난자형성과정은 난세포의 크기 증가, 난황낭의 축적, 염기성 물질의 감소, 난막발달 및 두께의 증가로 요약될 수 있으며 일반적인 다른 과의 담수경골어류와 큰 차이는 없는 것으로 확인되었다. 본 연구는 광학현미경상의 조직학적 결과이므로 앞으로 정확한 난자형성과정을 단계적으로 확인하기 위한 투과전자현미경을 이용한 미세구조적 연구가 필요하다. Glow-light tetra, Hemigrammus erythrozonus is a teleost belonging to Characidae. The natural habitate of this fish is the wild in the Essequibo river, Guyana and South America. The oogenesis of glow-light tetra was investigated by light microscopy to compare with those of other families. A pair of ovary was located between swim bladder and intestines. The ovary was of white color and ellipsoidal shape with the major axis 11 mm and the minor axis 4 mm. Cytoplasm of oogonia was basophilic and many nucleoli were located at inside of nuclear membrane. In primary oocytes, yolk vesicles were distributed only in the marginal area and egg envelope was not formed on the outside of an egg. In secondary oocytes, the egg envelope was formed and yolk vesicles in the cytoplasm were increased than the earlier stage. The amount of basophilic substance was decreased. In case of matured egg, thickness of egg envelope and size of egg were increased, basophilic substance was distributed in only around the egg envelope. The yolk vesicles were changed to yolk mass in accordance with development. In conclusion, the oogenesis of glow-light tetra, Hemigrammus erythrozonus was characterized by the increase in cell size, the formation and accumulation of yolk, and the decrease of basophilia a in the cytoplasm. The oogenesis of glowlight tetra seems to share common patterns in Characidae, teleost and have a similar pattern with other teleost.

간과된 건성 추지의 수술적 치료

김융성,서중배,이석재,홍장수 충북대학교 의학연구소 2001 忠北醫大學術誌 Vol.11 No.2

연구목적 . 손상 후 3주 이상 경과된 건성 추지에 대하여 tuft를 만들어 주고 신전상태에서 K-강선으로 고정하는 수술적 치료 방법의 유용성을 분석하고자 하였다. 대상 및 방범: 1997년 8월부터 2001년 3월까지 본 교실에서 건성 추지로 치료받은 예 중 손상 후부터 3주 이상 경과된 환자 11예를 대상으로 하였다. 평균 추시 기간은 7개월(3개월-9개월)이었으며, 평균 연령은 19세(2년 3개월-48세)였다. 11예 중 4예는 15세 미만의 소아였다. 수상 후 수술까지 경과된 기간은 평균 12개월(3주-7년)이었다. 우측 수부가 7예였고, 좌측은 4예였다 수지 별로는 인지가 3예, 중지가 4예, 약지가 2예, 소지가 2예였다. 모든 예에서 신전건의 절단, K-강선에 의한 원위지 관절의 고정, tuft의 형성, Roll-stitch 등의 동일한 방법을 사용하였으며, 최종 추시일에 Crawford 평가방법을 사용하여 환자를 평가하였다. 결과: Crawford의 방법을 이용한 평가 결과, 11예 중 7예(64%)가 우수(Excellent)의 결과를 보였고, 3예(27%)는 우량(Good), 1예(9%)는 양호(Fair)로 판명되었다. 즉 11예 중 1예를 제외하고는 모두, 즉 91%에서 만족스런 결과를 얻었다 우량 또는 양호의 결과를 보였던 4예의 경우 수상 후 경과된 기간이 각각 4개월, 9개월, 3년, 7년으로 수상 후 경과된 기간이 길수록 결과가 나빴다. 15세 미만의 소아 4예는 모두 우수한(Excellent) 결과를 보였고, 반면에 양호로 판정된 환자는 연령이 48세로 대상 환자 중 가장 고령이었다. 손상된 수지가 좌측이거나 우측인지 여부와 몇 번째 수지인지 여부는 결과와 무관한 것으로 보인다. 성별과도 관련성을 알 수 없었다. 결론: 손상 후 상당기간이 경과한 후에도 비교적 간단한 수술 방법에 의한 치료가 가능하였으며, 결과도 만족스러웠으나, 지나치게 오래된(손상 후 수 개월 이상이 경과한) 건성 추지의 경우, 그리고 나이가 많은 경우 예후가 좋지 않다는 사실을 알게 되었다. Purpose : The authors have attempted to analyze the effectiveness of making tuft and fixing the distal interphalangeal joint in extension with a K-wire in patients whose injured finger were left over 3 weeks without treatment for the tendinous mallet finger. Materials and Methods : Eleven fingers of eleven patients were analyzed who were treated operatively from August 1997 to March 2001. The average follow-up period was 7 months(3-9 months). The average age of the patients was 19 years(2 years 3 months-48 years) Four out of the 11 cases were children under age of 15. The average duration between injury and operation was 12 months(3 weeks-7 years) . All cases were treated by only one surgeon(Seo, JB) and with same procedure, just cutting and reattaching the extensor tendon tightly(tuft) and fixing the joint in extension. Crawford method was used for evaluating the patients. Results : Ten out of eleven patients(91%) came out to be satisfactory according to Crawford method. Excellent in 7 cases, good in 3, fair in 1, respectively. Four patients whose duration between injury and surgery seemed to be too long(4 months, 9 months, 3 years, 7 years respectively), have not showed excellent results. Excellent results were reported in all children. On the contrary, the age of the patient who had the poorest result was 48 years(the oldest in our series) Which hands or which fingers were injured seemed to have not made any differences. So as the surgery was performed earlier and the patients were younger, the results were better. Conclusion : We advocate that it is possible to treat operatively and to get good results in Patients with neglected mallet finger deformities. But it should be emphasized that the earlier the operation is performed, and the younger the patients are, the better the results are.

重金屬이 Chlorella 세포의 生長및 呼吸能에 미치는 影響

朴載錫,金鍾均,李永祿,崔鎬亨 공주대학교 사범대학 과학교육연구소 1980 과학교육연구 Vol.12 No.1

Chlarella ellipsoidea를 Hg, Cu, Pb, Zn과 같은 중금속 처리배지에서 배양하고 배양중 일정량의 세포를 收穫하여 생장률 및 엽록소 함량을 측정하고 여러농도에서 呼吸能을 측정 비교하였다. 1) 중금속 처리구에서의 세포의 生長, 엽록소함량 호흡能은 정상세포에 비해 정도의 차이는 있으나 모두 감소하였다. 2) 생장장해는 엽록소형성能과 비슷한 저하현상을 보였으며 ??서는 Hg가 가장 심한 장해 를 나타내었고 다음으로 Cu Zn Pb의 順이었다. 그러나 ?? Zn처리구에서는 ?? Hg나 Cu및 ?? Pb처리구보다 심하였다. 3) ??에서의 Hg및 Cu처리구에서는 각각 접종후 3시간 및 41시간후에 황백화현상과 더불어 사멸하였다. 4) 呼吸能은 대체로 ??이상의 농도에서 억제되는 경향을 나타내었다. Chlorella ellipsoidea cells were cultured in a Mercury, Lead, Copper or Zinctreated medium. Some portions of the cells were taken out at intervals during the culture, and the growth rate, the chlorophyll content and the respiratory activity of the cells were meaured. 1. Growth rate, chlorophyll content and respiratory activity of the heavy metaltreated cells decreased more or less, compared with these of the normal cells. 2. The growth retardation showed the similar tendency to the lowering of biosynthesis of chlorophyll, which in ?? medium came out to gradually severe in follow order, Lead, Znic, Copper, and Mercury. But the growth of the cells in ?? Zinc-treated medium was retarded more severely than in ?? Mercury or Copper and ?? Lead-treated medium. 3. The cells in the medium containing 1?? Mercury died out with chlorosis 3 hours later after inoculation, and those in ?? Copper-treated medium, 41hours later. 4. Generally the respiratory activity showed a tendency to de controlled in ?? and over.

온톨로지 매핑 정보를 이용한 웹 서비스 자동발견

송재경,김도현,변영철,이상준 제주대학교 공과대학 첨단기술연구소 2004 尖端技術硏究所論文集 Vol.15 No.2

Web Service is a new model based on web to offer dynamic information for a user's request. Currently, the web service discovery mechanism is not efficient because it does not support automatic discovery based on the semantics or capabilities of a web service. The language for semantic web service, such as OWL-S, is being developed to express the capability of a web service semantically. Such semantics can support the more flexible discovery of web services. Web service discovery occurs when the provider's description matches to that of requester. But the matching can fail when the ontologies of service description differ from that of the requester although the requester wants that Web Service. In distributed environment service providers develope their semantic web services independently and tend to use their ontologies to describe web services. So a new approach must be required to avoid service discovery failure. In this paper, a method of annotating the query of requester and discovering semantic web services without service discovery failure is proposed.

규칙기반 CC/PP 프로파일 생성 방법

송재경,변영철,이상준 제주대학교 공과대학 첨단기술연구소 2005 尖端技術硏究所論文集 Vol.16 No.2

In the ubiquitous computing environment, service providers should able to deliver their services to various devices, such as PDA, Smart Phone, Telematics devices. For this purpose, W3C announced 'Composite Capabilities / Preference Profile (CC/PP) Standard' for delivery-context description. At present, only a small number of mobile phone supports the CC/PP standard, But most of contents servers do not. In this paper, by analyzing request headers which are received from various ubiquitous devices, a rule-based CC/PP profiling method in ubiquitous environment is developed. Service providers can use these profiles for providing optimized services to the various devices which have different capabilities.