p-Nitroaniline-formaldehyde의 重合體에 關한 硏究(Ⅱ)

강성구,권순채 영남이공대학 1982 論文集 Vol.11 No.-

Studies on the kinetics of reaction between p-NA and formaldehyde at the aqueous medium. The linear polymer of p-NA and formaldehyde via HCI catalysis, was attempted in order to fine an optimul reaction condition. Formaldehyde reacts with p-NA more easily at bigher temperature. The nature of the reaction products formed, depends on the temperature at which the reaction is carried out.

生長調節劑(MH)處理에 依한 고추의 密植栽培 試驗

姜鎬宗,姜炳九,姜鎬允,安相烈 진주산업대학교 1981 論文集 Vol.19 No.-

고추의 栽植密度와 MH 處理時期가 고추의 收量 및 收量構成 要素에 미치는 影響을 규명코져 새로나 건고추(VP-Hy-40)를 供試하여 포장시험을 실시한바 그 結果를 要約하면 다음과 같다. 1. 栽植密度間에는 收量面에서 密植할수록 붉은고추 및 착과수가 공히 증가하는 현상이다. 2. 密植程度가 높아질수록 전체의 수량도 많았는데, MH를 8月21日 處理한 경우에 있어 栽植密度가 높을수록 붉은고추의 重量 및 收量이 많았다. 3. 草長 및 地上部 중량, 地下部 重量 그리고 莖徑은 栽植密度에 별 影響없이 無處理區에 비해 處理區가 감소하는 현상이다. 4. 栽植密度別로 一定한 현상이 없이 붉은고추의 수는 8月21日 處理區에 않았고 미숙 풋고추의 수는 8月1日 處理區가 많았다. This experiment was carried out to find the effect of planting density and MH treatment on the yield of pepper and factors of yield component, Pepper (Capsicum annum) cv Sairona gun(Vp-Hy-40), was planted for this experiment, The results were Summarized as follows. 1. In the treatment of planting density, the more density was increased, the more number of red pepper and fruit setting was increased. 2. The more the density was increased, the total yields was increased. And on the plots of MH treatment on August, 21. the weight and the number of pepper was highest. 3. The plant height, top weight, root weight, and stem diameter of peppers treated with MH, and planting density was decreased than those of control. 4. The number of red pepper fruits was highest in the plots treated with MH in August 21, planting density did not appear to influence the red pepper fruit number. Highest number. Highest number of immature green pepper fruits was obtained in the plots treated with MH in Augnst, 1.

관상동맥질환 환자에서 스텐트 시술 후 재협착에 관한 연구

강진환,권영주,박상호,한대희,이상철,김명구,변정득,최병조,심규혁,온영근,현민수,김성구 순천향의학연구소 2001 Journal of Soonchunhyang Medical Science Vol.7 No.2

Background and aims : In the coronary artery disease, a rate of restenosis was much decreased by placement of coronary stent than when percutaneous transluminal coronary angioplasty has been applied, but there are still important clinical problems of restenosis. There has been many progressive studies about various factors contributed to this restenosis. So, we studied a relation between restenosis after placement of coronary stent in the coronary artery disease and many clinical factors, characteristics of stenotic lesion and procedural factors, and also assessed the restenosis rate of various coronary stents. Methods : Total 58 lesions(46 cases of patients ; man 30, woman 16) were evaluated, which has been performed a follow-up coronary angiography after 6 months (mean 188 days) since coronary stent had been placed. Various stents were implanted and assessed a relation between restenosis and many factors. Results : Of 58 lesions were target stenotic studies, there were 22 of restenotic lesions(37.9%), and the restenosis rate wes statistically significant difference in the relation with diabetes mellitus(p<0.05), group of acute myocardial infarction(p<0.05) among clinical diagnosis of ischemic heart disease(stable angina, unstable angina and acute myocardial infarction) in clinical factors and with high dilation pressure of stent(p<0.05) in procedural factors. When the rate of restenosis was evaluated among implanted stents, it was lowest in the Multilink^(®) stent and highest in the Nir Royal^(®) stent(60%). Conclusion : In this study of restenosis and various factors after placement of stents in the coronary artety disease, factors such as diabetes mellitus, group of acute myocardial infarction and a dilation pressure of stent were significant related with restenosis and the restenosis rate of Multilink^(®) stent was lowest and the highest restenosis rate was of Nir Royal^(®) stent.

차량의 GPS 동적 측량에 의한 데이터 정확도 비교

강인준,장용구,강성수 부산대학교 1995 生産技術硏究所論文集 Vol.48 No.-

GPS developed for the strategic equipment by U.S. Deparment of Defence is a navigation satellite system alternative of Navy Navigation Satellite System. So it is not introduced to public. Otherwise, it is used variously in many fields as well as high accuracy surveying network and acquirment of geo-spatial data. The GPS system has been used in static surveying and specialist used its equipment. It is very difficult for unspecialist to use. The GPS system is used to the Car Navigation system and being changed easy equipment for everyone. The GPS system of dynamic surveying is known about 100m accuracy. In this study, it is compared to three GPS system (Pathfinder, Garmin, Svee six) navigated along the road from Pusan Univ. to Haeundae. According to the study, expensive equipment was surveyed to DGPS principle and was very good to acquracy. But, it is able to be processed to real time DGPS. It is difficult to survey by using expensive equipment in the Car Navigation System. Thus, accuracy of the GPS equipment is not higher than it can process datum to real time, the development of software is suitable to make Car Navigation System GPS는 종래의 위성항법체계였던 NNSS와 교체된 새로운 항법시스템으로써 미국방성의 전략장비로 개발되었다. 일반인들에게는 공개되지 않았으나, 현재는 전세계적으로 고정밀 측지망 구성 및 지형정보의 취득에 필수적 장비인 동시에 다양한 분야에서 범용적으로 사용하고 있다. 또한 GPS장비는 정적의 측량에 사용되어져왔기 때문에 일반인이 이용하기에는 상당히 어려웠다. 그러나, 현재에는 GPS장비가 Car Navigation System의 소개로 일반인이 쉽게 이용할 수 있는 장비로 바뀌고 있다. 일반적으로 동적 측량에 의한 GPS장비는 약 100m의 정확도를 가지고 있는 것으로 알려져 있다. 본 연구에서는 부산대학교를 출발하여 해운대까지의 도로를 따라 주행한 세 개의 GPS장비인 pathfinder와 garmin 그리고 SVee Six의 정확도를 서로 비교 고찰하였다. 연구에 따르면, 값비싼 장비는 DGPS를 원리로 측량이 되고 그 정확도도 상당히 좋았다. 그러나, 상당히 고가의 장비는 실시간으로 DGPS가 가능하다. 차량주행을 위한 시스템은 값비싼 장비로는 불가능하다. 따라서, 정확도는 조금 떨어지지만, 값싸고 실시간으로 자료를 처리할 수 있는 GPS장비와 소프트웨어의 개발이 차량주행 시스템 구성에 적당하였다.

(+)-Aspicilin의 합성에 관한 연구

강석구,이성호 성균관대학교 기초과학연구소 1990 論文集 Vol.41 No.1

(+)-Aspicilin은 Lecanora속에 속하는 lichen에서 분리된 거대고리락톤계 항생물질이다. 본 연구에서는 이를 비대칭적으로 합성하기 위해 두 부분의 합성 중간체인 벤질 5-데옥시-2, 3-0-이소프로필리덴-6-요드-α-D-만노시드와 (S)-(+)-9-데신-2-올을 각각 합성하였다. We have studied the synthesis of (+)-aspicilin, a macrolactonic substance which is isolated from a lichen source of the Black forest. As building blocks for enantiocontrolled synthesis of (+) -aspicilin, benzyl 5-deoxy-2. 3-0-isopropylidene-6-iodo-α-Dmannofuranoside and (S)-(+)-9-decyn-2-ol were synthesized.

Pd 촉매하에서 유기주석 화합물과 Iodane 화합물의 Cross-Coupling 반응에 관한 연구

강석구,이홍우,김재선,최상철 성균관대학교 기초과학연구소 1996 論文集 Vol.47 No.1

The palladium-catalyzed coupling of organostannanes with iodanes(Koser's and Zefirov's reagents) in the presence of palladium catalyst was accomplished at room temperature under aqueous conditions to afford phenyl- or 4-iodophenyl-substituted products depending on the iodanes used.

Hypervalent Iodonium Salt와 Organofluorosilane 의 Cross-Coupling과 Carbonylative Cross-Coupling에 관한 연구

강석구,토쿠따로야마구치,김태현,편성재 성균관대학교 기초과학연구소 1996 論文集 Vol.47 No.1

The palladium-catalyzed cross-coupling and carbonylative cross-coupling of aryl-, alkenyl-, and alkynytfluorosilanes promoted by fluoride ion with hypervalent aryl-, alkenyliodonium tetrafluoroborates were achieved at room temperature under an atmospheric pressure of carbon monoxide.

Pd 촉매하에서 allylic alcohol과 hypervalent iodine 화합물의 위치 선택적 vinylation에 관한 연구

강석구,이홍우,장수범,김태현,편성재 성균관대학교 기초과학연구소 1995 論文集 Vol.46 No.2

The formation of carbon-carbon bond by palladium-catalyzed coupling of aryl or vinyl halides with olefins, known as the Heck reaction, has become a powerful tool in organic chemistry. In the case of allylic alcohols, palladium-catalyzed reaction of organic halides usually affords β-substituted ketones or aldehydes rether than β-substituted allylic alcohols.

MPEG-II AAC 심리음향 모델에 관한 연구

구대성,김정태,이강현 조선대학교 에너지.자원신기술연구소 2000 에너지·자원신기술연구소 논문지 Vol.22 No.2

Currently, the most important technology is the compression methods in the multimedia society. Audio files are rapidly propagated through internet. MP-3 is offered to CD tone quality in 128Kbps, but 64Kbps below tone quality is abruptly down and high bitrate. On the other hand, MPEG-I1 AAC (Advanced Audio Goding) is not compatible with MPEG-I, but AAC has a high compression ratio 1.4 better than MP-3. Especially, AAC has max 7.1 channel and 96KHz sampling rate. In this paper, the perceptual model is dealt with 44.1KHz sampling rate for SMR(Signa1 to Masking Ratio)

의사결정자의 성격유형과 위험성향

강태건,조성구 한국경영과학회 1996 韓國經營科學會誌 Vol.21 No.2

The personality types developed by Gustav jung are frequently used to identify people's decision-making style, especially to determine which functions are dominant ones in the perception and the processing of information. In this paper, the Jungian typology is utilized to investigate if there are any systematic relations between an individual's personality type and her/his attitude toward risk. For this purpose, an experiment was conducted where 99 subjects, mostly students, participated in a computer-simulated horse racing game. Each subject's risk-seeking propensity was measured by the winning chance of the selected horse and the amount of stakes. The results of the experiment show that a decision-maker who is extrovert(E) in attitude and intuitive(N) in perception of information is more likely to be risk prone than the introvert(I) and sensing(S) type. Feeling(F) function in information processing seems to induce more risk seeking attitude than thinking(T) function, but the statistical significance could not be found from the data, for this statement.