가토 외고정 모델을 이용한 치밀체형 세라믹스의 골결합능 평가

이재협,이동호,이재학,공현식,안영준,류현승,서준혁,홍국선,김환,장봉순,이춘기 대한정형외과연구학회 2003 대한정형외과연구학회지 Vol.6 No.2

The Knight’s Tale and The Miller’s Tale as One Tale

Lee,Dong-Choon 신영어영문학회 2011 신영어영문학 Vol.49 No.-

Lee, Dong-Choon. The Knight’s Tale and The Miller’s Tale as One Tale. The New Studies of English Language & Literature 49 (2011): 103-131. The first two tales-the Knight’s Tale and the Miller’s Tale-of the Canterbury Tales are the representative examples that reflect not only the narrative technique of the “juxtaposition of opposites,” but also Chaucer’s narrative tendencies. The special poetic achievements (and limitations) of each are seen most clearly when the two tales are read together, one in the light of the other, as their juxtaposition invites. The Knight’s Tale and the Miller’s Tale, when read together, are the representative examples which tell what Chaucer attempts to show through his narrative technique of the juxtaposition of opposites and what attitude he expects from a reader. Chaucer does not mechanically indoctrinate an unique view of the world to the readers. He, avoiding his authorial stance on a certain limited view embodied in each tale, forces the specific views of the narrative onto the reader. It is through the juxtaposition between the completely different two tales in such things as tale-teller, plot, character, language, and the narrative voice that Chaucer creates the multiplicity of voice and the plurality of theme, and he trains a reader to grope for meaning from various sides. (Daegu University)

Voxel머리팬텀 제작 및 붕소중성자포획요법 선량계산에의 응용

이춘식,이춘익,이재기 대한방사선 방어학회 2001 방사선방어학회지 Vol.26 No.2

해부학적으로 단순한 수학적인형팬텀의 한계를 극복하기 위한 voxel머리팬텀을 제작하고 BNCT(Boron Neutron Capture Therapy) 시행 시 선량분포를 계산하였다. 일반목적 몬테칼로 코드인 MCNP4B의 반복구조 알고리즘을 이용하여 voxel몬테칼로 계산체계를 수립하였고 두 가지 물질로 구성된 예시적 voxel팬텀과 기하체조합팬텀의 계산값 비교를 통해 계산체계를 검증하였다. 미국 NLM(National Library of Medicine)에서 제공하는 VHP man 인체단층사진에 대한 분할 및 색인작업을 통해 voxel머리팬텀을 제작하여 AP 및 PA 방향에서 입사하는 넓고 평행한 광자 및 중성자빔에 대한 선량값을 MIRD팬텀의 계산값과 비교한 결과 중성자빔 AP방향조사 시 MIRD팬텀에서는 볼 수 없는 안구로 인한 중성자 감쇠현상을 확인할 수 있었다. 3차원 정밀계산이 필요한 BNCT 시술시 선량분포계산을 위해 뇌 중앙에 직경 5cm의 구형 뇌종양 체적을 정의하고 뇌와 종양의 붕소 함량을 조정하여 10keV 및 40keV 상부입사 중성자에 의한 장기별 흡수선량을 계산한 결과 종양에 30㎍/g, 정상세포에 3㎍/g 의 붕소를 주입한 경우 붕소함량이 없을 때에 비해 2배 가량 큰 선량을 보였다. 본 연구를 통해 voxel몬테칼로기법을 이용한 선량평가체계를 수립하였고 정밀한 선량계산을 필요로 하는 치료방사선분야 선량계산에 실제 인체에 가까운 voxel팬텀의 응용가능성을 제시하였다. Voxel head phantom for overcoming the limitation of mathematical phantom in depicting anatomical details was constructed and example dose calculation for BNCT was performed. The repeated structure algorithm of the general purpose Monte Carlo code, MCNP4B was applied for voxel Monte Carlo calculation. Simple binary voxel phantom and combinatorial geometry phantom composed of two materials were constructed for validating the voxel Monte Carlo calculation system. The tomographic images of VHP man provided by NLM(National Library of Medicine) were segmented and indexed to construct voxel head phantom. Comparison of doses for broad parallel gamma and neutron beams in AP and PA directions showed decrease of brain dose due to the attenuation of neutron in eye balls in case of voxel head phantom. The spherical tumor volume with diameter, 5cm was defined in the center of brain for BNCT dose calculation for downward neutron beam of 10keV and 40keV, the tumor dose is about doubled when boron concentration ratio between the tumor to the normal tissue is 30㎍/g to 3㎍/g. This study established the voxel Monte Carlo calculation system and suggested the feasibility of precise dose calculation in therapeutic radiology.

Special Issue of Professor Kiehwa Lee`s Retirement: Geophysical Environments of the Korean Peninsula : Articles ; Geoelectrical Structure of the Kyongsang Basin from Magnetotelluric Sounding

( Choon Ki Lee ),( Heui Soon Lee ),( Byung Doo Kwon ),( In Ky Cho ),( Seok Hoon Oh ),( Yoon Ho Song ),( Tae Jong Lee ) 대한지구물리학회 2006 지구물리 Vol.9 No.3

最近 3年間 本敎室에서 經驗한 腫瘍 253例에 對한 臨床病理組織學的 考察

李揆鶴,高永春,李廷鎭,朴鍾雲,李鍾元,林鍾福,林春悅,朴順道 최신의학사 1964 最新醫學 Vol.7 No.4

Phosphorus Removal in Pilot Plant Using Biofilm Filter Process from Farm Wastewater

차월석,Sung-Euy Shin,DuBok Choi,Choon-Boem Lee 한국생물공학회 2006 Biotechnology and Bioprocess Engineering Vol.11 No.4

Various environmental conditions affecting total phosphorus removal from farm wastewater in a biofilm filter process were investigated using loess balls and Chromobacterium LEE-38 at a pilot plant. When Chromobacterium LEE-38 was used, the removal efficiency of total phosphorous was approximately 10- or 5-fold higher than that of Acinetobacter CHA-2-14 or Acinetobacter CHA-4-5, respectively. When a loess ball of 11~14 mm manufactured at a 960°C calcining temperature was used, the removal efficiency of total phosphorous was 90.0%. When 70% of the volume fraction was used, the maximum efficiency of total phosphorus removal was 93.1%. Notably, when the initial pH was in the range of 6.0 to 8.0, the maximum removal efficiency of total phosphorus was obtained after 30 days. When the operating temperature was in the range of 30 to 55°C, the maximum removal efficiencies of total phosphorus, 95.6 to 94.6%, were obtained. On the other hand, at operating temperatures below 20°C or above 40°C, the removal efficiency of total phosphorous decreased. Among the various processes, biofilm filter process A gave the highest removal efficiency of 96.4%. Pilot tests of total phosphorus removal using farm wastewater from the biofilm filter process A were carried out for 60 days under optimal conditions. When Acinetobacter sp. Lee-11 was used, the average removal efficiency in the p-adsorption area was only 32.5%, and the removal efficiencies of chemical oxygen demand (COD) and biological oxygen demand (BOD) were 56.7 and 62.5%, respectively. On the other hand, when Chromobacterium LEE-38 was used, the average removal efficiency was 95.1%, and the removal efficiencies of COD and BOD were 91.3 and 93.2%, respectively.

Phosphorus Removal in Pilot Plant Using Biofilm Filter Process from Farm Wastewater

Shin, Sung-Euy,Choi, Du-Bok,Lee, Choon-Boem,Cha, Wol-Suk The Korean Society for Biotechnology and Bioengine 2006 Biotechnology and Bioprocess Engineering Vol.11 No.4

Various environmental conditions affecting total phosphorus removal from farm wastewater in a biofilm filter process were investigated using loess balls and Chromobacterium LEE-38 at a pilot plant. When Chromobacterium LEE-38 was used, the removal efficiency of total phosphorous was approximately 10- or 5-fold higher than that of Acinetobacter CHA-2-14 or Acinetobacter CHA-4-5, respectively. When a loess ball of $11{\sim}14mm$ manufactured at a $960^{\circ}C$ calcining temperature was used, the removal efficiency of total phosphorous was 90.0%. When 70% of the volume fraction was used, the maximum efficiency of total phosphorus removal was 93.1%. Notably, when the initial pH was in the range of 6.0 to 8.0, the maximum removal efficiency of total phosphorus was obtained after 30 days. When the operating temperature was in the range of 30 to $55^{\circ}C$, the maximum removal efficiencies of total phosphorus, 95.6 to 94.6%, were obtained. On the other hand, at operating temperatures below $20^{\circ}C$ or above $40^{\circ}C$, the removal efficiency of total phosphorous decreased. Among the various processes, biofilm filter process A gave the highest removal efficiency of 96.4%. Pilot tests of total phosphorus removal using farm wastewater from the biofilm filter process A were carried out for 60 days under optimal conditions. When Acinetobacter sp. Lee-11 was used, the average removal efficiency in the p-adsorption area was only 32.5%, and the removal efficiencies of chemical oxygen demand (COD) and biological oxygen demand (BOD) were 56.7 and 62.5%, respectively. On the other hand, when Chromobacterium LEE-38 was used, the average removal efficiency was 95.1%, and the removal efficiencies of COD and BOD were 91.3 and 93.2%, respectively.

엽록소에서 방출되는 형광의 분석을 통한 광합성 연구

이춘환 한국생화학분자생물학회 1990 생화학분자생물학회 소식 Vol.10 No.3

Photosynthesis research fields using chlorphyll fluorescence as a very sensitive and non-destructive tool are introduced. Steady-state fluoresence can be studied by using derivative and curve-fitting analyses. In comparison to these methods, multilinear analysis is introduced as a new tool which can handle broad room-temperature fluorescence spectra of photosynthetic systems very well. Fluorescence induction process is divided into the fast rising period and the next slow decaying period. Information available by studying these periods and limitations on several methods employed in studying photosystem Ⅱ heterogeneity are discussed. Finally studies on time-resolved fluorescence using single-photon timing method are introduced with emphasis on the global analysis and the target analysis.

축구선수들의 코치 리더쉽 선호도 분석

이용인,민춘기,김재운 충남대학교 체육과학연구소 2000 體育科學硏究誌 Vol.18 No.1

The purpose of this study was to analyze the preference of leader behavior styles according to the trait of soccer players. The trait of soccer players was characterized by age, career of winning a prize, birth order. The classified five behavior styles were training and instruction behavior, democratic behavior, autocratic behavior, social support behavior and positiv feedback behavior in the multidimensional model introduced by Chelladurai and Saleh(1980). Total of 286 soccer players were answered to the questionnaire. All subjects were registered players at the federation of soccer and attended national tournament more than once. The findings of this study were as follows: 1) In the preference of leader behavior style among the soccer players, training and instruction behavior was the most perceived behavior style. Democratic behavior, Positive feedback behavior, and social support behavior were preferred to be of second, third and fourth respectively. Autocratic behavior was the least preferred leader behavior style. 2) In the difference of leader behavior style according to the age of soccer players, middle school team preferred more than pro team in the training and instruction behavior, democratic behavior, and positive feedback behavior. 3) No significant difference was found according to the career of winning a prize and birth order of soccer players in the preference of leader behavior styles.

비정질 Fe_(90-x)Ni_(x)Zr_(10)(x=5, 10) 금속의 구조분석

李凞福,宋寅命,柳志旭,李春雨 公州大學校 基礎科學硏究所 1993 自然科學硏究 Vol.2 No.-

X-선 회절상을 분석하여 비정질 fe90-x NixZr10 (x=5,10) 금속의 구조를 구하였다. X-선 회절상은 2θ가 20˚ 근방과 35˚ 근방에서 전형적인 비정질 금속의 halo상을 나타냈으며, 구조인자와 원자분포함수의 각 peak는 비대칭성을 나타내어 액체금속과는 다른 구조를 보였다. 계산된 동경분포함수(RDF)의 각 peak들은 인접원자들의 분포를 나타내는 것으로서 Gaussian 함수형태를 나타내었으며, 이들을 Gaussian 함수로 각각 fitting하여 구조에 관한 변수들을 구하였다. Fe80 Ni10 Zr10의 구조분석 결과 최인접 원자배위수는 13.2이 었고, 최인접 원자간 평균거리 r0는 2.60Å, 인접원자들의 분포폭을 나타내는 Gaussian 함수의 변수 δr은 0.35Å이었다. 또한 Fe85 Ni5 Zr10의 최인접 원자배위수는 13.8이 었으며, r0는 2.62Å, δr은 0.35Å, 이었다. 본 시료의 δr은 일반적인 비정질 금속들의 값보다 훨씬 크게 나타났다. X-ray diffraction patterns of amorphous fe90-x NixZr10 (x=5,10) alloys were analyzed to obtain the structural information. The X-ray diffraction pattern of the amorphous alloys consists of typical halo-patterns at diffraction angles near 2θ = 20˚ and 35˚. And the structure factor and the atomic distribution function have unsymmetrical peaks differed from those of liquid metals. The structural parameters representing the atomic distributions of near-neighbors were obtained by Gaussian fittings to the peaks of the radial distribution function (RDF). From these parameters the estimated coordination numbers were 13.2 and 13.8, the mean distances between nearest neighbor atoms r0 were 2.60Å and 2.62Å, and the Gaussian parameters δr indicating the range of nearest atomic distribution were broth 0.35 Å for amorphous Fe80 Ni10 Zr10 and Fe85 Ni5 Zr10 alloys, respectively. The parameters δr of the amorphous allays turn out to be much larger than those of typical amorphous alloys.