산전초음파에서 발견된 기형의 계통별 진단 임신 주수의 차이

이병관,김선미,홍준석,심순섭,박중심,전종관,윤보현,신희철 대한산부인과초음파학회 2003 대한산부인과초음파학회지 Vol.5 No.2

JDBC를 이용한 Web-GIS 구현

전홍구,최관순,공용해 순천향대학교 부설 산업기술연구소 1999 순천향 산업기술연구소논문집 Vol.5 No.2

GIS is evolving from a technology that addresses specific applications to a broad-based information system. Its value goes beyond increased efficiency, cost savings. Therefor GIS will be fundamental to the future on the internet. But our organizations and societies exclusively handle geographic informations in Korea. and they use independently foregin commercial GIS softwares. It makses difficult to accmulate local techniques in GIS. In order to solve this problem we implement WEB-GIS using JDBC without depening specific software.

산업부산물을 이용한 중금속/유기성 슬러지의 고형화 및 용출특성에 관한 연구

전관수,김인환 嶺南大學校 工業技術硏究所 2004 工業技術硏究所論文集 Vol.32 No.1

This paper discusses the development of mixes for silica fume as stabilization/solidification agents and binders for industrial wastewater residue containing organic and heavy metal contaminants. The UCS(Unconfined Compressive Strength) gradually increased to 66.7% as the silicafume content increased to 15%. The leaching of TOC and chromium decreased as more OPC was substituted with silica fume. When the mix had 5% silica fume, it retained about 85% TOC, and chromium leached out 0.76mg-Cr/g-Cr in acidic solution. Also, microstructural studies of the solidified wastes through the scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS) and X-ray diffraction analysis showed that the silica fume caused an inhibition to the ettringite formation which did not contribute to setting, but coated the cement particles and retarded the setting reactions. The results indicated that the incorporation of silica fume into the cement matrix minimized the detrimental effects of organic materials on the cement hydration reaction and contaminant leachability.

EG-모드 마이크로스트립 아이소레이터에 관한 연구

田啓石,丁寬秀,金容平 慶熙大學校 1980 論文集 Vol.10 No.-

In X-band, a edge-guided(EG) mode microstrip isolator is designed in which nonreciprocal attenuation is due to the ferromagnetic resonance absorption caused by a strong d-e magnetic field applied locally at the shorted edge of a ferrite microstrip. From modal analysis. the dominant EG mode has been shown to propagate alone the microstrip with one edge shorted to the ground plane. Dispersion relations and rf electric field distributions have been calculated numerically. And the upper limit and the cutoff frequency of band width have been discussed with several design parameters. A practical EG-mode microstrip isolator based on these results has been successfully designed, which has more than 25dB isolation.

물구나무서기 Performance와 運動能力과의 關係에 對한 硏究

田寬錫,李鐘虎 忠南大學校體育科學硏究所 1986 體育科學硏究誌 Vol.4 No.1

A study on the relationship between the performance of hand standing and the basic physical fitness for sports . This research program was planned to study the relation - ship between their abilities for “hand_standing" and their physical fitnecs for other activities in general Through the two recording tests, 1 came to the conclusions as follows : 1. The result from the second test is quite similiar with that from the firstone. except in the records of their ability to sit- ups on the ground. 2. The stature and weight don't have any immediate relation with their abilities for pull -ups, vertical-jumps. and sit- ups. However. it is evident that they are quite slightly related with one another. 3. It is admittable that there are something quite related with one another. in their abilities for pull-ups. sit-ups , vertical- jumps. and hand standings on the wall.

송풍 및 교반속도가 음식쓰레기 고속퇴비화에 미치는 영향

전관수 嶺南大學校 環境問題硏究所 1995 環境硏究 Vol.15 No.1

음식쓰레기 고속퇴비화 장치의 개발을 위해 적정 운전조건을 조사하였다. 일반적인 퇴비화의 운전조건에 대해서는 국내외적으로 많은 연구결과들이 제시되고 있으나 고속퇴비화기기에 대해서는 연구결과의 발표가 미흡한 형편이다. 고속화퇴비기기에서는 연속적인 음식쓰레기의 공급과 교반이 행해지며 별도의 수분조절제를 첨가하지 않는 것이 경제적이므로 이에 따른 최적의 공기공급속도와 교반속도는 통상의 퇴비화와는 상이한 결과를 보일 수 있다. 본 연구의 결과 적정 공기량은 함수량의 변화에 따라 다르겠지만 2lℓof air/kg of food waste 이상은 되어야 안정한 퇴비화가 가능한 것으로 나타났다. 또한 교반속도는 공기량보다 퇴비화에 미치는 영향이 더 큰 것으로 사료되며, 대체적으로 회전축의 회전속도 증가에 따라 퇴비화의 진행정도가 비례하여 퇴비의 인발횟수를 줄이고 안정된 퇴비를 얻기 위해서는 2rpm 이상의 교반속도가 필요하였다. The optimum operation conditions for composting the garbage and food wastes were investigated using high rate composter. Previous studies were mainly focussed on the operating conditions for conventional composting process. The results obtained from the high rate composter were considerably different from those of the conventional process, since the continuous feeding and agitation were conducted, and bulking agent was reduced. In this study, 2lℓof air/kg of food water/min of aeration rate was proper for full aerobic composting. Composting efficiency was improved as the agitation rate increased. The agitation of about 2 rpm was necessary for stabilized compost in high rate composter.

전방 천골 수막류 - 증 례 보 고 -

박준석,신원한,김범태,변박장,최순관 대한신경외과학회 1998 Journal of Korean neurosurgical society Vol.27 No.11

成長期 어린이의 步行狀態分析

田寬錫,洪盛杓 忠南大學校體育科學硏究所 1984 體育科學硏究誌 Vol.2 No.1

In order to comprehend the walking situations of the children in a growing period and to offer basic materials for a right walking guidance, I measured and analysed the step angles and vertical difference between both steps of a primary school's students (mas.: 380 persons, fem.: 340 persons). The following results were obtained ; 1. According to the measurement of step angles and vertical difference between both steps and its analysis, there were no changes by ages. 2. In the walking angles, a right foot is more foot -outside lined than a left one, and boys are more foot - outside lined than girls. 3. Boy students walk more widely than girl students in vertical difference between both steps. 4. While walking, children whose both feet are foot- inside lined and overlap each other, and whose both feet are foot-inside and are open, are much more. 5. A walking habit of child remains unchanged up to adult.

전달행렬에 의한 탄성지반에 놓인 축대칭 원추-원통형 탱크 해석

이관희,정성태,박준용,남문희 慶尙大學校生産技術硏究所 1997 生産技術硏究所論文集 Vol.13 No.-

Even though there are many analysis methods of circular tanks on elastic foundation, the finite element method requires a number of memory spaces computation time to solve large stiffness equations, In this study many the simplified methods are applied to analyze a cone-cylinder tank on elastic foundation. By the given analysis methods, direct stiffness method and foundation matrix method, the con-cylinder tank was transformed into the skeletonized frame structure. The frame structure was drivided into several finite elements. The stiffness matrix of a finite element is related with the transfer matrix of the element. Thus, the transfer matrix of each finite element utilized the transfer matrix method to simplify the analysis of the tank. There were no significant difference in the results of two methods, the finite element method and the transfer matrix method. The transfer matrix method applied to a circular tank on elastic foundation resulted in four simultaneous equations to solve completely

중공 크랭크축의 비틀림 진동 해석 및 측정

金寬柱,文洪晙 弘益大學校 科學技術硏究所 1995 科學技術硏究論文集 Vol.6 No.-

In recent years, the problems of noise and vibration are critical issues in order to reduce the weight of internal combustion engine components. It is found that the bending, torsional and lateral vibration of crankshaft are the main causes of engine noise and vibration problems. Therefore it is necessary to identify the vibration behavior of crankshaft. In this paper, the vibration analysis of hollow crankshaft was carried out. The torsional vibration characteristics of hollow crankshaft were analyzed and compared with those of same size solid crankshaft in respect of equivalent mass and stiffness by using I-DEAS. The natural frequencies and mode shapes of both crankshafts are measured by impact hammer test using LMS CADA-X system.