3원계 화합물 반도체의 에너지 밴드 구조와 전기적 특성 연구

김철회,김형관,한백형 漢陽大學校 基礎科學硏究所 1994 基礎科學論文集 Vol.13 No.-

Empirical pseudopotential 방법을 이용하여 아연 화합물 반도체의 에너지 밴드 구조를 구하였다. ??의 에너지 간격은 InSb의 조성비에 따라 ??=0.606χ²-0.727χ+0.361를 얻었고 전자이동도는 χ=0.6, 합금산란 포텐셜이 0.82eV, 온도가 77。K, 불순물 농도가 ??일때 6.7 × 10⁴cm/V-s을 얻었다. Energy band structure of zinc-blende semiconductors is calculated by the empirical pseudopotential method using the adjustable parameter. Energy gap of ?? with InSb mole fraction is ??=0.606χ²-0.727χ+0.361 and its electron mobility is found to be a high value of 6.7 × 10⁴cm/V-s with mole fraction x=0.6, alloy scattering potential ΔU=0.82eV, Temperature T=77。K, and impurity concentration ??.

최대운동시 당질상태에 따른 혈장 에피네프린과 노르에피네프린의 반응

김형렬,황수관 대한스포츠의학회 1995 대한스포츠의학회지 Vol.13 No.1

The purpose of this study was to investigate changes of plasma epinephrine and norepinephrine during maximal exercise in various glycogen conditions. The subjects were composed of 7 male college students. They performed graded exercise test by way of bicycle ergometer in normal glycogen condition, glycogen-depleted condition and glycogen-loaded condition. Glycogen depletion and loading condition were formed as a results of exercise and dietary. plasma epinephrine and norepinephrine were analyzed of blood samples extracted every 3 minutes until exhaution. On the basis of the results analyzed in this study, conclusions were drawn as follow. 1. Plasma norepinephrine in this study, conclusions were drawn as follows. condition with work loads, and difference between glycogen-loaded condition and glycogen depleted condition was significant (p<0.05) from the work load of 120W. 2. Change of norepinephrine/epinephrine was increased in both normal glycogen condition and glycogen-loaded condition with work loads, and differences among three conditions were not significant on the whole.

화상처리를 이용한 지능형 가공시스쳄의 설계 및 구현

김관형,김수정,김영탁,문희근,이상배 한국해양대학교 산업기술연구소 2003 연구논문집 Vol.20 No.-

본 논문은 자동화 시스템에 적용 가능한 지능 제어 시스템에 관한 연구이다. 따라서 본 연구에서는 지능제어 이론과 영상처리기술들을 이용하여 지능형 복합제어시스템을 능동적으로 제어하는 것을 목적으로 한다. 지능형 복합제어시스템의 성능 평가와 제어 전략은 각각 신경회로망과 퍼지이론을 이용하였고, 영상 처리기법을 이용하여 물체의 특정 위치를 추출하였다. 실제 시스템에 적용하여 얻은 실험 결과를 통하여 본 논문에서 제안한 방버의 유효성을 제시하고자 한다. This paper is research into intelligent control system that is able to apply at automatic system. So, in this paper we are in control of intelligent compound control system actively for the use of intelligent control theory and image processing. Performance evaluation and control strategy of intelligent compound contro system were used to neural network and fuzzy theory, we proposed detection of particular position using image processing we propose availability of proposed method based experiment result that apply to real system in this paper.

호흡기 감염에서 Sparfloxacin 의 임상적 유용성에 대한 Enoxacin과의 비교 검토

김주옥,김선영,김관형,서지원,박석영,이종진,박성학 대한감염학회 1995 감염 Vol.27 No.4

목적:폐렴, 기관지염, 만성기관지염에서 fluoroquinolone제제로서 항균력이 강하고, 혈중 반감기가 길고, 객담과 조직내 농도가 높은 sparfloxacin의 안전성과 효과를 enoxacin과 비교하기 위해 본 연구를 시행 하였다. 방법:1994년 10월부터 1995년 4월까지 충남대 부속병원과 대전 성모병원에 내원한 폐렴, 급성기관지염, 만성기관지염이 급성으로 악화된 환자 63명을 대조군(32명)(enoxacin 100 mg 1일 3회 경구투여), 실험군(31명)(sparfloxacin 200mg 1일 1회 경구투여)으로 나누어 임상증상, 세균학적 객담 검사, 혈액검사, 실험실내 항균력검사로 그 치료율 및 안전성을 비교하였다. 결과: 1) 임상종합 평가, 세균학적 균소실, 안전성, 유용성에서 두군간에 의미 있는 차이는 없었다. 2) 시험관내 항균력검사상 MIC가 실험군이 대조군보다 현저하게 낮았다.(p<0.05). 3) 경미한 두통, 식욕감퇴, 상복부 불쾌감, 설사등이 대조군 9예, 실험군 7예에서 발생하였고, 검사실 소견상 SGOT 혹은 SGPT 의 일시적 경미한 상승이 대조군 2명, 실험군 3명에서, 혈중 creatinine 상승이 실험군 2명에서 있었으나 경미하였다. 결론:이상의 결과로 sparfloxacin은 폐렴, 급성기관지염, 만성기관지염의 악화에서 하루 한번 투여로 enoxacin 하루 3번 투여와 유사하게 효과적이고 안전하며, 시험관내 항균력이 enoxacin보다 월등히 우수하여 임상에서도 유용하게 사용될수 있을것으로 생각된다. Background: Sparfloxacin, a new oral quinolone, has a broad spectrum, potent antimicrobial activity, prolonged half life, high concentration in sputum. The clinical efficacy and safety of sparfloxacin have been reported by some previous clinical studies performed in Japan. The objectives of this study were to evaluate the clinical and antimicrobial efficacy of this drug in respiratory tract infections compared to those of enoxacin. Methods:We performed an open controlled, randomized study in 63 patients with acute bronchitis, pneumonia, and exacerbation of chronic bronchitis at Chung Nam University hospital and Dae Jeon St. Mary's hospital from October, 1994 to April, 1995. In the control group(n=32), 100 mg enoxacin was administered orally 3 times a day and in the test group(n=31), 200 mg sparfloxacin once a day. Results: The results were as follows; 1) There were no significant differences between the two groups in clinical efficacy, bacteriological finding, and usefulness. 2) Means and SD of MICs were 0.44±0.89 ㎍/ml in the control group, 0.13±0.24 ㎍/ml in the test group. There was a significant difference in MICs between the two groups(p<0.05). 3) Headache, epigastric discomfort, and loss of appetite were observed in 7 cases of the control group and in 9 cases of the test group, and transient elevations of hepatic enzyme in 2 cases of the control group, and in 3 cases of the test group. There was mild elevation of serum creatinine in 2 cases of the test group. Those laboratory abnormalities by therapy might be associated with their underlying diseases. There were no significant adverse effects caused by the drugs Conclusion:In conclusion, sparfloxacin of 200 mg once a day was as effective and well tolerated as enoxacin of 100 mg three times per day in the treatment of respiratory tract infections. Sparfloxacin is more potent antibiotics because MICs of sparfloxacin were very lower than those of enoxacin.

서울 대기 에어로솔의 물리적 특성 : 0.01~1.0㎛범위 에어로솔의 표면적 및 체적분포의 월변화

김형관,김필수 漢陽大學校 環境科學硏究所 1988 環境科學論文集 Vol.9 No.-

입자 크기 0.01~1.0 ㎛범위 서울 대기 aerosol의 표면적 및 체적의 월변화를 1984년 5월부터 10월에 걸쳐 전기적 aerosol분석기로 결정하였다. 그 결과 표면적 분포는 0.13 ㎛ 근처에서 극대를 가지는 一山型 곡선을 보였다. 체적분포는 0.2 ㎛ 근처에서 극대를 나타내며 직경 1.0 ㎛ 이상에서 제2의 극대가 있을 가능성을 보였다. 이러한 분포는 직경이 커질수록 입자의 개수가 점점 줄어드는 입자수 분포와는 판이하게 다른 것이었다. 표면적 및 체적분포의 월변화는 춘계에 최고의 농도분포를 보이고 하계에 최저를, 그리고 추계에 점점 증가하는 양상을 나타냈다. 이러한 계절변화는 자연환경과 기상요인의 변화와 밀접히 연관된 것이었다. Monthly variation of surface and volume distributions of Atmospheric aerosols over the size range 0.01~1.0 ㎛ has been determined using an electrical aerosol analyzer in Seoul from May through to October 1984. The results indicate that the surface distribution reveals a monomodal curve with its maximum in the vicinity of 0.13 ㎛ for each month, while the maximum of the volume distribution appears at about 0.2 ㎛ suggesting a possible existence of second maximum somewhere D>1.0 ㎛. These distributions are quite different from the aerosol number distribution which is characterized by a continous decrease of number concentration as increasing particle size. The monthly variation of the surface and volume distributions shows their highest values in spring and lowest in summer. followed by a gradual increase in autumn. The seasonal variation is closely related with change of natural environment and meteorological factors.

지능기법을 이용한 가공시스템의 설계 및 모니터링에 관한 연구

金永卓,文熙根,金秀貞,金寬衡,李尙培 한국해양대학교 산업기술연구소 2003 연구논문집 Vol.20 No.-

본 논문은 지능 기법과 영상처리기법을 이용하여 특정 대상물의 절단위치를 검색하는 방법을 제시한 것으로서, 최근에는 기존의 아날로그 센서를 대신한 CCD(Charge-Couple Decive)카메라로 얻어진 화상 데이타(data)를 이용하여 물체의 정보를 추출하는 방법이 많이 응용되고 있다. 최근에 영상의 형태학, 신경망, 지식기반의 영상 해석 시스템에 대한 관심이 높아지면서, 거의 모든 분야에 화상처리기법들이 사용되어지고 있다. 따라서 본 논문에서는 실시간 그레이 레벨의 입력 화상에 대하여 영상처리기법을 이용하여 특정 물체의 특정위치검출 방법을 제안하고, 실제의 시스템에 적용한 예를 제시하려고 한다. In this paper proposed detecting specific position of the object using intelligent method and image processing. Recently instead of classifying the object by shade using existing analog sensor, app.y a theory to detect of the object information by using image data from CCD camera. It takes interest in the morphology of image, neural networks and image analysis system on knowledge base. and now days, image processing method was used in the most part of field. So, In this paper proposed detecting method on specific position of specific object about real time gray level input image using image processing method and application case in real system.

學校長의 指導性類型. 狀況的 要素. 學校組織 建康間의 關係硏究

金炯寬 高麗大學校 敎育問題硏究所 1988 敎育問題硏究 Vol.1 No.-

CuInSe₂의 결정구조에 관한 연구

김형관,이건상,김옥경 漢陽大學校 基礎科學硏究所 1988 基礎科學論文集 Vol.7 No.-

Se를 화학당량비보다 10% 더 첨가하여 2단전기로를 사용하여 용융법에 의해 성장시킨 CuInSe₂의 결정화 여부를 x-ray diffractometer로 측정한 회절무늬와 계산된 회절무늬를 비교하여 결정하였다. 성장된 결정은 격자상수가 a=5.78Å과 c=11.59Å인 chalcopyrite 구조를 가지며 c/a=2.005로 신장 외곡을 하고 있다. Ⅵ족 원자의 위치를 결정하는 값 x는 x=0.2487이며, ??=2.5007Å, ??=2.5095Å으로 Se가 Cu쪽에 가깝게 위치하고 있다. 따라서 성장된 결정은 이온분극을 가진 것으로 해석된다. CuInSe₂ crystals are grown by directional freezing method using two-zone furnace. The crystal structure are investigated using x-ray diffractometer by powder method and compared with calculated data. The lattice constants are calculated a=5.78Å and c=11.59Å. The distance between atoms are ??=2.5007Å and ??=2.5095Å. It is found that Se atoms are positioned toward Cu atoms.

TRISS Method와 ASCOT Method를 이용한 외상환자의 생존율 분석

김형수,배성만,양혁준,박철완,이근,고영관 대한응급의학회 1995 대한응급의학회지 Vol.6 No.2

Despite traumatic injuries cause serious problems in our society, there are few adequate and objective scoring system that assess the severtiy of trauma patients. The Major Trauma Outcome Study(MTOS)in United States deisgned the TRISS(Trauma Score & Injury Severity Score)method by means of Revised Trauma Score(RTS),Injury Severity Score(ISS0,and age,while Champion et al deviced ASCOT(A Severtriy Characterizaiton Of Trauma)method to overcome the limitation of TRISS. This study attempted to make a comparison between TRISS and ASCOT by using date for 422 injured patients which were collected form September,1993 to February,1994. Ascot and TRISS were compared in their sensutivity,Specificity,disparity and Z-statistics. 1)Sex ratio of male to female was 2.8:1 and the commonest age of trauma patients was thirties (23.8%). 2)The average probability of survival(Ps)for 442 patient by TRISS method was 0.9228 and that of ASCOT method 0.9356. 3)Disparity of Ps between survival and non-survival using TRISS and ASCOT was relatively low for both indexes as 0.3507 and 0.3296, respectively. 4)The sensitivity rates(number of patients predicted to die who actually died/total who actually died)for the non-survival of both TRISS and ASCOT method were low (35.0%),but the specificity rates(number of patients predicted to live who actually lived/total who actually lived)for the survival of TRISS and ASCOT were 99.1%and 99.6%respectively. 5)Z-statistics(difference between predicted and actual number of death)of both TRISS(1.3224)and ASCOT(1.2234)resulted in positive value which meant that actual number of death exeeded predicted number of death. 6)The ASCOT that have presumed to be more accurate method for patients with head trauma and with multiple injuries to one portion of body,had its intricacy and difficult points in practical application. And the difference between the result of ASCOT and TRISS was not so significant. 7)It is thought that a new, more comprehensive index would like to be developed and thoroughly tested on a variety of data sets in order for it to be used in trauma system quality assurance evaluation.

合成洗劑가 빨간집모기의 生態, 生理學的 特性에 미치는 影響

金正和,李炯來,朴垠澈,李容揆,崔觀善 충북대학교 농업과학기술연구소 1995 農業科學硏究 Vol.12 No.2

It is considered a general experience that migration from rural to urban areas will go on in any developing countries pursuing economic development through industralization. In Korea, migration is considered one of the serious socio- economic problems because it has been made excessively fast than any other countries' experiences. The socio- economic problems originates in migration can be classified in two ways ; the one is the overpopulated problems of urban areas and emptied villages problems of rural areas, and the other is the shartage agricultural labor farce problems symbolized by the increasing idle cultivated land. To relieve migration effectively, the developing policies should be converted from pursuing fast industralization and urbanization to balance growth between areas and industries. Moreover problem solving political measure should be converted from partial and corresponding approaches to total approaches containing economic, social and institutional side-view.