사연 및 동판저수지의 식물성 플랑크톤에 관한 연구

강현무,박시섭,이상명,조현아,이진우,이호원 慶南大學校 附設 基礎科學硏究所 1995 硏究論文集 Vol.7 No.-

본 연구는 1994년 2,5,8,11월의 4회에 걸쳐 실시하였다. 조사 결과 동정 분류된 식물성 프랑크톤은 사연호가 6강 126분류군, 동판저수지가 5강 100분류군으로 전체 6강 211분류군이 출현하였다. 월별 종조성은 사연호에서 5월이 50분류군, 8월이 43분류군, 2월이 31분류군 순으로 출현하였다. 동판저수지는 5월이 49분류군, 11월이 27분류군, 2월 25분류군, 8월이 24분류군 순이다. 강별 구성비에서 두 지역모두 녹조강이 가장 많고 다음이 규조강 순이다. 전체 종조성은 사연호는 녹조강 54.3%, 규조강이 25.2%, 유글레나강 7.9%, 남조강 7.1%, 황녹조강 4.7%, 황갈조강 0.8%순이다. 동판저수지의 전출현 종에 대한 종조성은 규조강 51.4%, 녹조강33.9%, 유글레나강 11.0%, 황갈조강 3.7%, 황녹조강 10.9%의 종조성을 나타내었다. 환경요인은 pH의 경우 사연호 8월에 9.28로 가장 높고, DO는 동판 5월이 12.3㎎/ℓ으로 가장 높게 나타났다. 클로로필 a는 사연 2월이 13.1㎎/㎥로 가장 높으며, 부유물질은 동판저수지 5월에 85.0㎎/ℓ으로 가장 높았다. Phytoplankton flora of Sayoun and Tongpan-Reservoirs were studied. A total of 204 taxa (Sayoun-Reservoir, 126 taxa : Tongpan-Reservoir, 100 taxa) were indentified. The Major taxa of two localities was Chlorophyceae 46.7% and Bacillariophyceae 35.1%. As the bloom causing species. Microcystis aeruginosa. Ceratium hirudinella and Peridinium divergens were identified. The chlorophyll a concentration of Tongpan-Reservoir was higher then Sayoun-Reservoir.

한국 전통 도깨비 문양을 고려한 팬던트 생산용 금형 제작 및 상품화 방안 연구

원시태,강민아,최우정,강미로 서울産業大學校 2005 논문집 Vol.54 No.1

Korean traditional ogre patterns generally have a meaning of protecting from demons and charming away unfortunates. However, their threatening faces and complexity of shapes have not appealed to the general public as personal accessories. In order to make use of their aesthetic and peculiar beauty of figures, a new concept of ogre accessory having a friendly-butterfly shape pendant is develope This study demonstrates whole processes of a capstone design case study, that is, conceptualization of the butterfly ogre pattern, die design and manufacturing for mass production, real production and quality progress, and commercialization process.

ATM과 멀티미디어를 이용한 원격 교육 시스템

장원호,박인호,류시국,강현석 慶尙大學校 1996 論文集 Vol.35 No.2

Recently, student-oriented education paradigms are appeared. At this point, we expect that the future's education will be changed by the distance eduation system based on multimedia materials. This study decribes an integerated real-time multimedia distance eduation system that uses ATM technology, object-relational detabase management system, and multimedia authoring tools to use interactive multimedia materials among remote sites in real-time.

SHS법에 의한 TiB_2-AI계 복합체의 합성 및 특성 연구

김시회,강석원,이형복 明知大學校 産業技術硏究所 2002 産業技術硏究所論文集 Vol.22 No.-

Abstract - The composite of TiB_2-A1 system was sintered by SPS and the microstructure and mechanical properties of activated powders prepared by mechanical alloying method. Mechanical alloying was performed in a planetary ball mill for 120~180min with 350rpm under vacuum. activated powders were sintered at 1400℃ for 4min with 60MPa under vacuum. As a result, TiB_2-Al composites showed the mechanical properties which is a much higher than that of monolithic TiB_2. The relative density and flexural strength of composition added Al 0.3mol were 98%, 847MPa and the hardness of 19.6GPa in the 0.1mol A1 addition composition was the highest.

나이에 따른 대식세포의 IL-6 생산양상의 변화

윤원기,김무강,조성환,류시윤 충남대학교 수의과대학 동물의과학연구소 1994 動物醫科學硏究誌 Vol.2 No.-

The present study was designed to observe the age-related changes in the IL-6 production capabilities of the peritoneal macrophages. Pertioneal macrophages were collected from adult mature (13-20 weeks of age) and aged BALB/c mice (60-70 weeks of age). Macrophages were cultured in the presence of endotoxin (lipopolysaccharide lug/ml, Escherichia coli serotype 0111:B4). In aged mice, IL-6 levels in the culture supernatants were seemed to be relative high than that in adult mature mice.

연속식 MMA polymer 중합반응기의 Fuzzy FF/FB제어

장원혁,강신춘,노시태 한양대학교 공학기술연구소 1992 공학기술논문집 Vol.1 No.1

A feedforward control law which is efficient in eliminating the effect of measurable disturbances on process outputs is synthesized by a fuzzy modeling. Through analyzing the process operation data sets we constructed the fuzzy model that could calculate the manipulation at steady-state for the load and/or set-point change and designed a feedforward/feedback controller based on it. The designed controller was installed to a CSTR polymerization reactor and its performance was evaluated through simulations.

관상동맥 내 빛간섭단층촬영술을 활용한 관상동맥 내 석회화 병변의 중재시술 후 경과 예측: 전향적 관찰 연구

장지홍,강시혁,조영석,신은석,서정원 순천향대학교 순천향의학연구소 2021 Journal of Soonchunhyang Medical Science Vol.27 No.1

Objective Imaging modalities such as intravascular ultrasonography or computed tomography or angiography have shown limitations in assessing coronary calcification. In this study, we investigated whether quantitative indices of optical coherence tomography (OCT) in calcified lesions are correlated with the late outcome of a coronary stent. Methods We consecutively enrolled patients who had more than grade 2 coronary calcification on fluoroscopy. OCT was performed at baseline, immediately after stenting, and at 9 months after stenting. We analyzed qualitative and quantitative characteristics of plaque, calcification, and stent-related indices. Results All images of 3-time points were available in a total of 10 patients. Calcified lesions were frequently associated with thin cap fibroatheroma (100%), plaque erosion (20%), or rupture (20%) before the procedure. Thrombus was found in 100% of cases in the OCT immediately after stenting. Maximal calcium area before stenting was strongly correlated with late luminal loss assessed by 9-month follow-up OCT (r= 0.766, P= 0.01). Conclusion Preprocedural OCT assessment on calcified coronary lesion may predict high-risk procedure and late stent outcome. Further studies are warranted to confirm these findings.

境界要素法에 의한 3次元 基礎一地盤 相互作用 시스템의 地震解析

權映錄,宋始榮,姜圓鎬,崔光圭,柳又秀 동아대학교 공과대학 부설 한국자원개발연구소 1990 硏究報告 Vol.14 No.1

In this study, the seismic analysis procedure of foundation-soil interaction system is presented. With the assumption of isotropic material properties and infinitesimal strain theory, the boundary element models of three dimensional foundation plate an semi-infinite soil medium are coupled together, using the compatiblity condition of displacements and equilibrium condition of surface tractions on the contact surface. Through the results of the examples in which the seismic responses of the foundation subjected to the SV-wave and the P-Wave, it is shown that the translational motions are decreased and the rocking motion is occured in higher frquency range.

절수에 의한 mongolian gerbil의 체중 변화에 관한 연구

이경열,송치원,김무강,조성환,류시윤,김상근,박배근 충남대학교 수의과대학 동물의과학연구소 1996 動物醫科學硏究誌 Vol.4 No.-

Recently, the mongolian gerbils have been used in neurology and the study of water metabolism because of their easy onset of epileptic seizure and typical resistance to water deprivation. The sebaceous glands which are under the control of the gonadal hrmones are differently developed from the other laboratory animals. However the physiological data on the changes of body weight following water deprivation in mongolian gerbils is not available until now. In order to investigate the effect of the water deprivation on the body weight, the animals were deprived of water for 15 days. The body weights were measured daily by the torsion balance. The mean, the standard deviation, the standard error and the coefficient of variance of the body weights were calculated. The correlation was examined. The potential regression equation was y = 61.5458 - 2.0533 * x + 0.0487 * x^2. The regression coefficient was 0.993. The results obtained were as follows : 1. The body weights of the mongolian gerbils were continuously decrased from the 1st day to the 15th day after the water deprivation. 2. The mean body weight on the water deprivation was 63.0±7.00g and that at the 15th day was 41.4 ± 5.42g. 3. The coefficients of the variance showed the highest (13.09) at the 15th day and the lowest (10.10) at the 10th day. the coefficients of the variance kept decreasing until the 10th day and thereafter gradually increased until the 15th day. 4. The changing rate of the body weight kept continuously decreasing from the 1st day to the 15th day showing the daily loss of 1.0 - 3.3%. 5.The deviations (M - QBW) between the measured values (m) and the theorical values (QBW) using the regression equation showed the highest (1.494) at the 1st day and the lowest (0.053) at the 13th day. 6. The sum of the devitions was 0.179 and that of the deviation square was 1.15. The sum of the deviation rates between the mesaured body weights and the theorical ones was 0.484. 7. The daily body weight loss showed the highest at the 1st day by 2.053g and the lowest at the 15th day by 0.591g. 8. The specific body weight changing rates which were the rate of the body weight changing velocity to the changed body weight were decreased from 0.033% at the 1st day to 0.014% at the 15th day.

Spiroxazine유도체의 분자 광스위칭을 이용한 능동형 평판 광도파로 자외선센서

옥경식,김시홍,김성훈,김응수,고광락,강신원 경북대학교 센서기술연구소 1998 센서技術學術大會論文集 Vol.9 No.1

UV Sensor is widely used for various fields with the study on UV detector and UV related researches. Also due to the recent increasing of UV radiation by ozone depletion enforces the development of techniques on efficient UV detection. Thus, in our study, we proposed novel UV sensor using photochromic molecular device that has good UV sensitivity and easiness to manufacturing, and low cost. Furthermore, this molecular device is useful for the construction of a thin film active waveguide type device that has excellent sensitivity and feasibility to miniaturization.