Fe-Ni-Si-B계 비정질합금의 자기적 성질

홍연기,김종오 忠南大學校 産業技術硏究所 1989 산업기술연구논문집 Vol.4 No.2

Amorphous (Fe Ni) Si B (x=0, 0.2, 0.4, 0.6, 0.8, 1, y=6, 8, 10, 12) alloys were prepared by a single roll quenching method. Both composition and temperature dependence of saturation magnetization were studied by vibrating sample magnetometer(VSM). Electrical resistivity was measured by four probe method and the power loss was calculated which is related change of frequency by A.C B-H loop tracer. Domain patterns were observed by Bitter method. 1. The preparation of amorphous alloys with all composition was possible, and after heat treatment crystallization occurred, resulting in Fe₃B and Ni₃B. 2. The saturation magnetization was increased with B content and the Curie temperature was about 750°K. 3. Electrical resistivity in amorphous alloys was twice in crystalline alloys and the crystallization temperature was increased with Si content. 4. The power loss of amorphous (Fe Ni) Si B alloys which is dependent on frequency was decreased with decreasing Si content and Ni content. 5. By heat treatment, the fingerprint type domain was gradually diminished and the decrease in power loss was also observed.

대퇴골 전자하부 골절에 대한 고관절 전치환술의 치험례

김종오,김택선,심재익,안택근,김장중 대한골절학회 1991 대한골절학회지 Vol.4 No.2

The Subtrochanteric area of the femur is composed mainly of cortical bone and highest in biomechanical stress, subtrochanteric fracture occured usually in the young age by direct trauma. Depending on the amount, speed and direction of energy, various patterns of subtrochanteric fracture occured. But it is difficult to stabilize the fractured fragments which was comminuted and under the muscular antagonistic force. It is important to obtain early ROM and early weight bearing for old aged patient, but difficult to stabilize the subtrochanteric fracture due to senile osteoporosis and characteristics of comminution. And we experienced subtrochanteric fracture of femur which was already ankylosed state and treated by total hip replacement using by long stem and supporting ring.

공권력 무력화 현상에 대한 실태분석과 대응방안에 관한 연구

김종오 한국행정학회 2009 Bulletins et mémoires de la Societe d'Anthropologi Vol.2009 No.13

YFeO_3 薄板單結晶에서 Bubble 磁區의 動的擧動에 關한 硏究

金鍾悟 충남대학교 공업교육연구소 1984 論文集 Vol.7 No.1

Dynamical behavior of bubble domain in the monocrystalline YF_e 0_3 (60㎛) has been investigated using the magneto-optic Faraday effect, when the pulsed magnetic field is applied. It was observed that large bubble was created when the pulsed magnetic field having high rise time like 40 nsec. The process of bubble ⇔dumbbell shape transformation was solved by the analysis of photgraphs and response signals obtained by dynamical behavior of the bubble domain

수사경과제의 효율성 제고방안

김종오 동국대학교 2005 大學院硏究論集-東國大學校 大學院 Vol.35 No.-

In order to specialize criminal investigation, the branch system of criminal investigation began 2005. 1. 1. The carrying out of branch system relates to "the mediation of right on criminal investigation" between police and prosecutor. Criminal investigation is process to seek evidence related to crime, to prosecute to the public prosecutors office, to induce judgement of guiltiness from court. Criminal Investigation is the most important part of policing, an investigators accomplish the most important task, and criminal investigation part is made up the man of ability. Recently situation of crime occurrence is increasing large extent, people recognize the fear of crime is high. Economic stagflation affect common people and increase people on unsoundness of credit. Investigators fall down morale because of duty on all-night, more numerous work than other police man of branch. Numerous and irregular work make the man of ability avoid serving in criminal investigation part. Therefore veteran investigators over five years serving in criminal investigation department are only 41%, therefore it is difficult to investigate efficiently. To improve epochmaking these problems, the branch system of criminal investigation introduced from 2005. 1. 1. We hope to improve arrest rate to criminal and to serve policing service for citizen. Promoting program on efficiency for the branch system of criminal investigation is some plans. First, it is necessary to select excellent police officer. and so for that must give incentive to them within the limits of not to impair equity. Second, it is necessary to improve working conditions. it needs stimulating plans to increase morale. Investigators works more time than other departments. We must compensate them for unstable home living, high smoking rate, chronic fatigue, etc. Third, it is demanded to cultivate the system to insure professionalism. To insure practical effect of kind of crime require investigation system by Local Police Agency. Forth, it is required to develop educational system. In the branch of criminal investigation is more effect practice than lecture in classroom. In conclusion, to succeed police reformation, it is more important confidence with citizen than efficiency of policing. It is demanded to recognize policing and criminal investigation that can trust police and support police administration. we desire to symbol truth and right for specialized investigators.

포항 옥성리 가-35호분 출토 투구의 보존처리

김종오,정혜윤 국립중앙박물관 2001 박물관보존과학 Vol.3 No.-

국립경주박물관의 보존처리 의뢰를 받아 포항 옥성리 가지구 35호분 목곽묘출토 철제투구(胃)의 보존처리를 실시하였다. 보존처리자는 발굴현장에서 유물수습에서부터 보존처리와 복원품의 제작에 이르는 일련의 작업과정을 보고하였다. Being entrusted with the conservation of Kyongju National Museum, the conservators did a conservation treatment on the iron helmet found in the wooden coffin excavated from No. 35 Tomb in Ga-Zone, Okseong-ri, Pohang, Kyongbuk Province. They reported their work ranging from the collection of and conservation treatment on the artifacts found at the excavation site to the restoration of them to the originals.

비만 중년여성의 운동프로그램 참여가 혈중 Vaspin, IL-6와 당내성에 미치는 영향

김종오,윤진환,지용석,이상학,강형숙 한국스포츠학회 2011 한국스포츠학회지 Vol.9 No.4

The purpose of this study was to investigate the effects of 12 weeks treadmill exercise program on plasma Interlukin-6, Vaspin and Glucose Tolerance in obese middle aged women. The subjects for this study were composed of twenty obese middle-aged women. The subjects were classified to two groups; control group(CG, n=10), exercise group(EG, n=10). Treadmill exercise was performed 4 times a week at the intensity of 50-65% HRR(1-3 weeks; 50% HRR, 4-6 weeks; 55% HRR, 7-9 weeks; 60% HRR, 10 -12 weeks; 65% HRR). The EG exercised for 12 weeks and were monitored for changes in body composition, plasma Interlukin-6(IL-6), vaspin and glucose tolerance. The results of this study are as follow; Body fat was significantly decreased in EG after 12 weeks of exercise. IL-6 and vaspin were significantly decreased in EG after 12 weeks of exercise. Glucose tolerance were significantly increased in EG after 12 weeks of exercise. In conclusion, the results of this study suggest that treadmill exercise can contribute to the better benefit in IL-6, vaspin and glucose tolerance for obese treatment.

압연공정을 이용한 금속 정밀여과막의 제조 및 여과특성

김종오,민석홍,정종태 한국막학회 2007 멤브레인 Vol.17 No.3

본 연구는 압연공정을 이용하여 금속망 만을 사용하여 금속막을 제조하는 과정과 금속망과 금속분말을 사용하여 금속막을 제조하는 과정에 대해 연구했다. 금속망 압연과정에서 선택된 금속망은 각각 10%, 20% 그리고 30%의 감소율로 압연했다. 이 압연공정은 망 wire의 지름을 변화시키거나 망의 단면적의 감소를 통해 망의 공경 크기를 감소시킨다. 압연된 금속망의 여과율은 압연시키지 않은 금속망의 여과율과 거의 동일한 여과율을 보였으며 금속막의 공경크기 분포 또한 더 균일했다. 금속망 위에 금속분말 층을 제조하는데 있어 분말 접합제로서 PVA를 사용하였으며 1시간 동안 100℃에서 금속분말 층을 건조시키고 진공에서 3시간 동안 1000℃에서 소결시키는 방법이 높은 공경 밀도와 균열이 없는 금속망 위에 금속분말 층을 형성하는 최적 조건이었다. 소결 전 30%감소율을 가지는 금속망에 대해 금속분말 층 형성에 압연공정을 적용할 경우 여과율이 약 0.7 μm인 금속막이 성공적으로 제조되었다. The manufacturing process of metal membrane made of only metal mesh and both metal mesh and powder with using rolling process have been studied. In the rolling of metal mesh, selected metal meshes were rolled with the reduction ratio of 10%, 20%, and 30%, respectively. Such rolling process resulted in the decrease of mesh pore size through reduction the cross sectional area of mesh and changing the diameter of mesh wires. Also, it enhanced the filtration ratio of rolled mesh which is almost same as the filtration ratio of upper grade unrolled mesh and the reliability of membrane by making pore size distribution become more uniform. In fabricating metal powder layer onto metal mesh, using PVA(polyvinyl alcohol) as a binder of powder, drying the metal powder layer at 100℃ for 1 hr, and sintering it at 1000℃ for 3 hr in vacuum were to be optimum conditions for obtaining good quality of metal powder layer on metal mesh with high pore density but no crack. With additional rolling of metal powder layer on metal mesh with 30% reduction before sintering, metal membrane which filtration ratio is about 0.7 μm has been successfully manufactured.

구리 및 크롬슬러지를 함유한 고화체의 물리적 특성과 용출특성

김종오 경상대학교 환경보전연구소 1993 環境保全硏究所報 Vol.1 No.1

It was attempted to investigate the physical and leaching characteristics of the solidified materials containing synthetic heavy metal sludges - copper and chromium. Considering the actual disposal environment of three different disposal option such as landfill, reuse in construction, and ocean disposal for the solidified wastes, three different leachants, namely, acidic water, distilled water, and seawater, were used in the leaching tests. The inhibition of cement hydration by the copper sludge significantly affected the physical properties of solidified materials. Fly ash additions deteriorated the overall properties of solidified materials. Leachate characteristics after 24-hr extraction were strongly affected by the nature of leachant, and leached metal concentrations were well matched with theoretical solubility according to leachate pH. A comparison of leaching characteristics indicated that acidic water was the most aggressive toward leaching the solidified matrices and distilled water was slightly more aggressive than seawater. Leachate alkalinity after seawater leaching decreased less than initial seawater alkalinity, which would be caused by carbonate influx and magnesium hydroxide formation onto solidified matrices. Surfaces of the leached samples were examined by scanning electron microscopy (SEM) and by X-ray diffraction analysis (XRD).

굴패각을 충진제로 이용하는 생물학적 오수처리방안 연구

김종오,최연돈,김홍철 경상대학교 생산기술연구소 2000 生産技術硏究所論文集 Vol.16 No.-

The purpose of this study was to develope the economical sewage treatment technology using oyster shells as biological contact media. As the stage of feasibility test in laboratory scale, the new submerged media processes with media-filling ratios of 20% and 55% were compared with the conventional activated process. Comparison parameters were the performance characteristics such as organic, nitrogen, phosphorus removal efficiencies. Operating conditions in terms of hydraulic retention time varied at 12 hr, 10 hr, and 8 hr. The results were as follows; 1.Removal efficiencies of organics such as BOD and COD showed almost the same in activated sludge and submerged oyster shell processes. The different filling ratios in submerged process showed also the same organic removal characteristics. 2.Nitrogen removal efficiencies showed that the submerged oyster shell process were better than activated sludge process. However, the different filling ratios in submerged process showed almost the same nitrogen removal characteristics. 3.Phosphorus removal efficiencies showed almost the same in activated sludge and submerged oyster shell processes. The increasing filling ratios in submerged process showed the little improvement of phosphorus removal efficiency.