높은 지향성을 갖는 Air Line 결합기 설계

길준범,이성원,최영호,박종임,안달,박준석 호서대학교 반도체제조장비국산화연구센터 2000 학술대회 자료집 Vol.2000 No.1

본 논문에서는, 일반적인 스트립 구조의 결합기가 갖는 문제 즉, 높은 온도에서 나쁜 특성을 보이는 문제점을 극복하고자 Air Line Type의 결합기를 구현하였다. 또한 이 결합기는 24dB이상의 지향성을 가지고 있다. 해석을 위해 짝수 모드와 홀수 모드 해석법을 사용하였고, EM-Simulation으로 확인한 특성과 실제 제작된 20dB, 30dB Cellular 대역(800∼900MHz) Air Line 결합기의 결고 특성은 좋은 일치를 보여주고 있다. 또한 최대 장점인 온도 특성은 온도 데이터를 통하여 온도에 강한 특성을 보임을 알 수 있다.

경쟁불안이 수영 선수들의 경기력에 미치는 영향

김원배,윤영길,현종호 서울대학교 체육연구소 2000 서울大學校 體育硏究所論集 Vol.21 No.2

The purpose of this study was to identify the effects of performance on the competitive anxiety in competitive situation. To achieve the aim of this study, the subjects were surveyed 172 swimming athletes and all athletes who selected the represent from each province was participated in Busan's Korea National Senior Games on 2000. The CSAI-2 Inventory developed from Martens et al(1990) was used to measure the athlete's psychological anxiety level, the method of survey was visited the athletic club school accommodation before 2 days ago in main events. The results was analysed by SPSS/PC and Mean/Standard Diviation were yielded in each factor. The independant t-test was used to know the difference of cognitive anxiety and physical anxiety on sex, athletic carrear, win experience after Middle School. On the basis of the results analyzed in this study, the conclusion were drawn as follows; 1.The difference of anxiety on sex was significantly appeared. The anxiety of girl players was higher than one of boy players. 2.The difference of anxiety on athletic carrear was significantly appeared. The anxiety of less carrear players was higher than one of more carrear players. 3.The difference of anxiety on win experience didn't significantly appeared.

근접센서를 이용한 자동 두께 측정 시스템

주해호,박현제,정길도,이재원 嶺南大學校 工業技術硏究所 1994 工業技術硏究所論文集 Vol.22 No.2

This paper describes the automatic thickness measurement of the surface grinder for a grinding wheel by application of a proximity sensor, a limit switch, and PLC. The control system is designed to provide feeding a workpiece on the turn-table and pressing it by the upper disk automatically. In the process, the automation of checking the thickness of a grinding wheel is most important. In order to measure the relative displacement, the proximity sensors were employed and the sensitivities of the sensors were investicated and discussed the superiority. It has been shown by model experiment that the automation system of the surface grinder is performed satisfactory.

문서화상의 신뢰성 향상을 위한 효율적 합성알고리즘

우종원,김호걸,최길성,유재수,조기형 충북대학교 컴퓨터 정보통신 연구소 1998 컴퓨터정보통신연구 Vol.6 No.2

본 논문은 Distance 합성알고리즘과 Runlength-Distance 합성알고리즘을 이용하여 효율적으로 문서화상을 합성하기 위한 방법을 제안한다. 데이터 또는 문서의 화소정보를 비밀리에 화상에 혼합하는 합성 알고리즘에는 임 Runlength 합성알고리즘(RM), Distance 합성알고리즘(DM), Runlength-Distance 합성알고리즘(RDM)등이 제안되었다. 그러나 이러한 합성알고리즘들을 적용한 기존의 방법은 암호화 시간이 길어지고 신뢰도가 떨어지는 문제점을 갖는다. 본 논문에서는 DM과 RDM 알고리즘을 보다 효율적으로 적용하여 암호화 시간을 단축시켰다. 또한, 기존 합성알고리즘에서의 합성방법을 변형한 형태로서 모듈별로 디지털 서명을 합성하는 방법을 제안한다. 이렇게 모듈별로 디지털 서명을 가함으로써 보안 전송에 있어서 가장 중요한 요소인 신뢰도를 증가시키도록 하였다. Runlength Mixing(RM), Distance Mixing(DM) and Runlength-Distance Mixing(RDM) algorithms have been proposed for mixing of bits of document-images security. However the existing mixing algorithms have some problems that increase cryptographic time and reduce confidence. In this paper, we propose an algorithm for mixing document images efficiently by using DM and RDM. When we mix digital signatures and secure documents, by using DM the proposed algorithm reduces the encryption time of document images. In addition the proposed algorithm mixes digital signatures by each module in order to increase confidence. It is shown through the experiments that our algorithm outperforms the existing mixing algorithms in terms of encryption time and confidence.

毛澤東의 黨權掌握過程에 關한 一考察

朴德元,金虎吉 釜山 外國語 大學校 1986 外大論叢 Vol.4 No.1

Mao Tse-tung grasped the contents and direction of a new tide of thought under the teaching of Li Tai-cho and was intoxicated by the teachings when he was engaged in the library of Peking University before and after 1920. He came to feel strongly about necessity of reforming China. He fixed his eyes upon peasants of the political bequest, for he had the most deepest interest in the peasants movement. Because of the failures in the collaboration between the Kuomintang and the Communists as well as in the Human harvest riot of 1927 made his utmost exertions in the development of a new revolutionary strategy getting out of the guidance route of Comintern. His strategy of revolution started from his recognition of the revolutionary potentiality of peasants. His struggles were mostly executed in farm-countries. In the process of the Long March in 1935. Mao's method of revolutionary strategy was, in the end, formally taken as the party policy. Later, as Mao's power of conducting the party was admitted in the Convention of Chun-ui 1935. the CCP would have the particular direction of revolution since the formation of the party. Mao's revolutionary method had no concerns with the Soviet-style revolution and the order of Comintern, and his strategy and tactics were based upon his originality. Finally, it turned out to be the most peerless and autonomous method in the settlement of Communist political power through a lapse of long years war between the Kuomintang and the Communist. Mao's assuming the rein of the government and his trial for development of strategy and tactics meant independence from the direction and interference of Comintern or Soviet Russia, and proved to be the example for the success of the peasants' revolution as one of the Chinese traditional and historical bequests. Mao's deep consideration of peasants and their roles resulted in the success in the revolution by the support of their potential power after training them. From the viewpoint of international relations, the Western imperialist reaction against the weak Eastern after all justified the continuity of revolutions in china. Therefore, because the anti-imperialist and anti-colonistic struggles offered the first purpose of restoring Chinese interests was legitimate, the background of the Communist revolution and of the party formation should be examined from the traditional political legacy and the functional relations with foreign powers. So, the birth and growth of the CCP came from the alien impacts, and its thought and ideology were rationalized by the alien thought. The CCP's peculiar development of revolutionary strategy was based upon the traditional elements including Chinese nationalism and Sinocentrism and at the same time, Mao's coming into power can be explained by the restoration of Chinese autonomy in new China construction.

골아세포 MC₃T₃-E₁의 증식과 기능에 Insulin Like Growth Factor Ⅰ, Ⅱ 및 부갑상선 호르몬이 미치는 영향

윤현구,정호연,양인명,김성운,김진우,김광원,김영설,최영길,서광식 대한내과학회 1992 대한내과학회지 Vol.42 No.1

MC₃T₃-E₁골아세포군을 이용하여 IGF-Ⅰ과 Ⅱ를 투여하고 DNA합성과 골아세포기능을 측정하기 위해 PTH에 대한 C-AMP반응정도, alkaline phosphatase 활성도를 측정하여 다음과 같은 결과를 얻었다. 1) IGF-Ⅰ과 Ⅱ는 모두 DNA합성이 어느 농도까지는 증식효과를 나타내지만 그 이후에는 억제되는 양상을 보였다. 2) PTH에 대한 골아세포의 C-AMP반응으로 증가되었지만 IGF-Ⅰ과 Ⅱ의 투여시 농도변화에 따른 의미있는 변화는 없었다. 3) 본 실험의 조건에서 alkaline phosphatase 활성도는 증가되지 않았다. 이상의 결과로 MC₃T₃-E₁ 골아세포에 IGF-Ⅰ과 Ⅱ는 세포의 증식을 자극하여 PTH는 C-AMP생성을 촉진하는 효과가 있었다. The effect of insulin-like growth factor (IGF) Ⅰ and Ⅱ on cloned MC₃T₃-E₁ cells that had osteoblastic activity was examined by [³H] thymidine incorporation into DNA, cyclic AMP responsiveness to parathyroid hormone (PTH), and alkaline phosphatase activity. IGF Ⅰ and Ⅱ stimulated the growth and proliferation of osteoblastic cells at 20ng/㎖ and 50ng/㎖, respectively. We next examined the effect of IGF-Ⅰ and Ⅱ on the expression of osteoblastic activity. Adenylate cyclase response of PTH to IGF-Ⅰ and Ⅱ-treated cells showed maximal stimulation at 10 and 50㎚PTH, respectively, but IGF Ⅰ and Ⅱ induced limited activity of osteoblastic function. In conclusion, IGF-Ⅰ and Ⅱ were potent stimulators to the growth of osteoblastic cells but did not have an immediate effect on expression of osteoblastic function in this experiment.

만성 경막하혈종의 단순 천공 배액술후 재발 및 두개강내 합병증 발생과 관련된 요인

김영규,민경수,이무섭,김동호,복원길,홍석기,김호재 충북대학교 의학연구소 2001 忠北醫大學術誌 Vol.11 No.2

연구목적: 만성 경막하혈종은 두개골 천두술및 혈종배액으로 쉽게 치료될 수 있는 예후가 양호한 질환으로 알려져 있으나, 혈종의 재발 및 합병증이 드물지 않게 발생하기도 한다. 본 연구는 두개골 천두술 및 혈종배액으로 치료받은 102예의 만성 경막하혈종 환자들을 분석하여 혈종의 재발 및 수술후 합병증과 관련된 요인들을 분석하고자 하였다. 대상 및 방법: 만성 경막하혈종으로 진단되어 두개골 천두술 및 혈종배액술법으로 본원 신경외과에서 수술치료받은 102명의 환자를 대상으로 하였고, 입원진료기록 및 방사선소견을 후향적으로 분석하였다. 재발 및 합병증의 발생과 관련된 요인으로는 수술전 환자의 나이, 의식상태, 양측성여부, 뇌실질의 위축정도, 수술후 기뇌의 양, 전신질환여부에 대하여 분석하였다. 결과: 재발의 빈도는 9.8% 였으며 재발과 관련된 요인으로는 양측성, 고령, 수술후 뇌실질재팽창정도(뇌 실질위축, 잔여수액, 기뇌)가 관계가 있었으나 환자의 예후에는 영향이 없었다. 합병증의 종류에는 수술후 급성출혈 5예 및 경막하 농양 1예가 있었으나 이는 모두 출혈성전신질환 또는 면역결핍증이 동반된 환자에서 발생하였고 예후가 불량하였으며, 긴장성 기뇌가 1예발생 하였다. 결론: 전신질환의 동반여부가 합병증의 발생 및 환자의 예후에 가장 중요한 영향을 미쳤으며, 비록 예후에는 영향이 적으나 혈종의 재발의 빈도가 드물지 않으며 기뇌의 방지 및 배액방법의 개선으로 재발의 빈도를 줄일 수 있을 것으로 생각된다. Purpose : Most of chronic subdural hematomas(SOH) are amenable disease with simple cranoistomy drainage, but the recurrence of SDH or development of complications after surgery is not uncommon. To see the prognostic factors related to outcome the recurrence of chronic subdural hematoma and development of complication were analysed in 102 cases of chronic SDH after craniostomy drainage. Materials and Methods: We studied 102 chronic SDH patients treated with craniostomy drainage. Clinical and radiological records were reviewed retrospectively. We analysed the recurrence and complication rate, factors related to the development of recurrence and complications. Results: The rate of recurrence of chronic SDH was 9.8% and factors related to recurrence were bilaterality, old age, and postoperative intracranial environments for brain reexpansion(degree of brain atrophy, amount of residual fluid, amount of intracranial air). Intracranial complications after surgery were developed in 7 cases(6.9%), 5 postoperative bleedings, 1 tension pneumocephalus, 1 subdural empyema. Conclusion : Preoperative clinical condition and association of serious sytemic disease were of major importance in prognosis. The recurrence of chronc SDH was not uncommon, Even though the recurrence was not related to the outcome, great care should be paid on the patients with high risk group.

Effect of broccoli and peanut sprouts on intestinal mobility and lipid level of Loperamide-induced constipation in rats

Won Yong Park,Si Hyung Park,Yoonbum Lee,Seungkuk Bae,Seulki Park,Youngjin Lee,Do-Won Lee,Kil-Soo Kim,In-Ho Kim,Byoung Boo Seo,Seong-Ho Kim 한국실험동물학회 2020 한국실험동물학회 학술발표대회 논문집 Vol.2020 No.2

Anticancer effect of silibinin on the xenograft model using MDA-MB-468 breast cancer cells

Won Ho Kil,Sang Min Kim,Jeong Eon Lee,Kyoung Sik Park,Seok Jin Nam 대한외과학회 2014 Annals of Surgical Treatment and Research(ASRT) Vol.87 No.4

Purpose: The aim of this study is to know whether silibinin has an anticancer effect on triple negative breast cancer xenograft model using MDA-MB-468 cells. Methods: To establish the xenograft model, we injected the MDA-MB-468 cells into female Balb/c-nude mice. After establishing a xenograft model, oral silibinin was administered to the tested mice in the way of 200 mg/kg for 45 days. The difference of mean tumor volume between silibinin fed mice and control mice was analyzed. The epidermal growth factor receptor (EGFR) phosphorylation in MDA-MB-468 cells was analyzed by Western blotting. The expression of VEGF, COX-2, and MMP-9 genes in tumor tissue was analyzed by real-time polymerase chain reaction (PCR). Results: In the xenograft model using MDA-MB-468 cells, we found that oral administration of silibinin significantly suppressed the tumor volume (silibinin treated mice vs. control mice; 230.3 ± 61.6 mm3 vs. 435.7 ± 93.5 mm3, P < 0.001). The phosphorylation of EGFR in MDA-MB-468 cells was inhibited by treatment with 50 mg/mL of silibinin. In real time-PCR analysis of tumor tissue obtained from sacrificed mice, the gene expression of MMP-9, VEGF, and COX-2 was 51.8%?80% smaller in silibinin group than that of control group and we can also verify the similar result using Western blotting analysis. Conclusion: We verified that silibinin had anticancer effect on xenograft model of MDA-MB-468 cells in the way of preventing the phosphorylation of EGFR and eventually suppressed the production of COX-2, VEGF, and MMP-9 expression. Finally, the tumor volume of xenograft models was decreased after administration of Silibinin.

Protein transduction of an antioxidant enzyme: subcellular Localization of superoxide dismutase fusion protein in cells

( Dae Won Kim ),( So Young Kim ),( Sun Hwa Lee ),( Yeum Pyo Lee ),( Min Jung Lee ),( Min Seop Jeong ),( Sang Ho Jang ),( Jin Seu Park ),( Kil Soo Lee ),( Tae Cheon Kang ),( Moo Ho Won ),( Sung Woo Cho 생화학분자생물학회 2008 BMB Reports Vol.41 No.2