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.

공권력 무력화 현상에 대한 실태분석과 대응방안에 관한 연구

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

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.

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).

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

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.

베르테르 효과에 대한 심리학적 분석 : 연예인을 중심으로

김종오 한국범죄심리학회 2010 한국범죄심리연구 Vol.6 No.3

Since the 1997 financial crisis, the Korea’s suicide rate has been skyrocketing. According to data from the Korea Statistical Office, the suicide rate in 2009 was 31 per 100,000 population; a total of 15,413 Koreans committed suicide that year. That was nearly twice the number in 1999, when 7,056 Koreans killed themselves. This is the fastest rate of increase among the 33 member countries of the OECD(Organization for Economic Cooperation and Development). In relation with this atmosphere, the tendency of closing for oneself's lives come out recently. The people is more increasing for feeling insensitive meaning of themselves' lives and fulfilling self murder, these days public figures of part of politics, economics and entertainments carried out suicides, and the statistics said that suicides is the primary causes for juvenile's death. The Supreme Prosecutors Office cited the Werther Effect to explain the two-fold increase in the number of suicides after popular actress Lee Eun-ju killed herself in 2005. An American, David Phillips coined the term “Werther effect.” It refers to the phenomenon of clusters of suicides happening or attempted after a person considered a role model or socially influential commits suicide in 1974. As to suicide many researches has been proceeding but they are insufficient to entertainer suicide. In this regard, In order to verify whether the so-called Werther effect exists, was examined the suicide rate of the non-entertainer from the year 2005 to 2009 in conjunction with six entertainer suicides during the same period in Korea. Through this analysis, It is safe to say that the copycat suicide of the non-entertainer following the death of entertainers does exist in Korea. This needs to be taken into consideration when dealing with the problem of suicide. 1997년 금융위기 이후, 한국의 자살 비율이 급격하게 증가하고 있다. 통계청 자료에 의하면 한국인의 2009년 자살 비율은 인구 10만명당 31명이었다. 그 수치는 1999년도의 자살 비율인 인구 10만명당 15명에 비해 거의 두 배의 수치에 해당된다. 이러한 추세는 OECD의 자료 확인이 가능한 33개 주요 회원국 가운데 가장 빠른 증가 속도이다. 이와 같은 분위기와 관련하여 자신의 생명을 허무하게 마감하는 경향이 최근 두드러지고 있다. 자신들의 삶에 더 이상 의미를 못 느끼고 스스로 목숨을 끊는 한국인들이 갈수록 크게 늘고 있는데 최근 유명 정․재계인 및 연예인들의 자살이 잇따르고, 우리나라 청소년의 사망 원인 1위가 '자살'이라는 통계가 발표되었다. 실제로 한국의 자살률은 이미 세계 최고 수준이다. 2009년 통계에 의하면 인구 10만명당 31명이 자살해 OECD 국가(평균 11.2명) 중 1위에 올라 있다. 2009년 자살자수는 15,413명으로 2008년보다 2,555명 증가하였고, 이는 하루 평균 42명, 35분에 1명씩 목숨을 끊는 것이다. 베르테르 효과는 자신이 모델로 삼거나 존경하던 인물 또는 사회적으로 영향력 있는 유명인이 자살할 경우 유사한 방식으로 잇따라 자살이 일어나는 현상을 일컫는 것이며 ‘동조자살(copycat suicide)’ 또는 ‘모방자살’ 이라고도 한다. 검찰에서 2005년 영화배우 이은주의 자살 사건 이후 2.5배나 늘어난 자살을 ‘베르테르 효과’로 설명했다. 자살과 관련하여 많은 연구들이 진행되어 왔지만 유명 연예인의 자살에 대해서는 부족한 면이 많다. 이와 관련하여, 한국에서 베르테르 효과가 있는지를 규명하기 위해 2005년~2009년 사이에 6명의 유명연예인 자살 사건 이후 일반인의 자살률 증가가 있는지 알아보았다. 이러한 분석을 통해, 한국에서도 유명 연예인의 자살 후에 일반인의 모방 자살 경향이 있다고 할 수 있겠다. 그러므로 앞으로 자살문제를 다루는데 있어 이 또한 고려 되어져야 할 것이다.

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.

요추 질환에서 동통 그림의 진단적 의의 및 가치

김종오 梨花女子大學校 醫科大學 醫科學硏究所 1995 EMJ (Ewha medical journal) Vol.18 No.4

저자들은 1993년 10월부터 1994년 9월까지 본원 정형외과에서 요추 질환으로 치료받은 환자 중 100명을 대상으로 하여 환자 자신이 작성한 동통 그림과 임상적인 진단 및 치료방향 설정의 상관관계에 대해 비교 분석하여다음과 같은 결론을 얻었다. 1) 동통 그림을 환자가 직접 작성함으로써 환자가 호소하는 증상의 부위와 양상을 쉽게 인식할 수 있다. 2) 동통 그림만으로 초기에 진단명을 쉽게 검색할 수 있었다. 3) 동통 그림에 의한 초기 진단과 최종 진단과의 상관관계에서 특히 추간판 탈출 및 정신장애성 질환이 있을때동등 그림이 임상적인 진단 및 치료방향 설정에 많은 도움이 되었다. There have been many recent advances in the clinical and basic sciences concerring the causeand cure of back pain and sciatica. Pain drawings has improved our diagnostic acumen and clinical evaluation in same speed ofmodern diagnositic equipment such as magnetic resonance imaging(MRI). Adequate pain drawings obtained from 100 patients who was treated for a low back disorder from October 1993 to September 1994. An initial dignostic impression was made at a glance over the pain drawing into five diagnostic group and the results were compared with the final diagnosis after treatment with magnetic resonance image(MRI). One helpful strategy in diagnosing cause of back and leg pain syndrome is to assign patientsto one of five diagnostic groups. These are (1) benign etiologies (2) radicalopathy from herniated disk (3) radicalopathy seconday to spinal stenosis (4) serious underlying disorders and (5)behavioral disorders. The initial impressions were 7 benign back pains, 55 disc herniation, 20 spinal stenosis, 15significant underlying disorder and 3 psycogenic back pain. The final diagnosis were 61 disc herniation, 17 spinal stenosis, 12 underlying disease, 7 degenertative disease, 3 psychogenic disorder. Concerning the disc herniation, spinal stenosis, psychogenic disorder there were significant relationship between the initial impression and the final diagnosis. Pain drawings afford an important clue to disc herniation, psycogenic disorder in the assessment of back pain.