持久性 運動 遂行을 위한 最適 準備運動量 硏究

田光熙,金永煥 仁荷大學校 스포츠科學硏究所 1992 論文集 Vol.4 No.-

The purpose of this study is to find out the adequate amount of warming-up prior to doing endurance exercises. The sample students were 40(male;18, female;22) selected randomly from In-Ha university. The method used for warming-up was P.T (Physical Training) gymnastic. The intensity of warming-up was 30 times of P.T per minute. The whole group was devided into four sub-group. Three of them were used for experimental purpose, and the fourth one was the controlled group. The program implemented is as follow : Group #1 was given 3-min. warming-up for male samples and 1-min. warming-up for female. Group #2 was given 4-min. warming-up for male samples and 2min. warming-up for female. Group #3 was gives 5-min. warming-up for male samples and 3-min. warming-up for female. Control group was given no warming up for male and female samples. Harvard Step Test was used for measuring their endurance abilities. Heart Checker 108 System made by Senho in Japan was used for measuring heart rate period during P.T gymnastics for warming-up and Harvard Step Test, To analyze the mean differences among four groups t-test and ANOVA were used. The results are presented below; 1. The effect of P.T gymnastics for warming-up proves to be positive in doing endurance exercise. 2. The adequate amount of warming-up using P.T gymnastics is 4 minutes in case of male and 1 or 2 minutes for female.

맥아즙당도에 따른 효모의 특성

김교창,최병주,김도영,정준영 충북대학교 농업과학기술연구소 1993 農業科學硏究 Vol.10 No.2

The conclusion from experiments in the characteristic of yeast strain for selecting the appropriate yeast strain according to the variation of wort plato was as follows ; 1.CB8l, CB175 and CB89 yeast strain showed 73.3%, 72.6% and 73.0% in its limit fermentation, respectively. CB89 yeast strain showed the good result of 46.3% in the fermentation power test, also CB8l and CB175 yeast strains showed 33.1% and 24.0%, respectively. 2.In the yeast cell size CB8l, CB175 and CB89 yeast strain showed 8.4㎛, 8.8㎛ and 8.0㎛, respectively, and in the flocculation test those sedimentation content showed 0.6ml, 0.4ml and 8.5 ml, respectively after 10 minutes. CB89 yeast strain with high flocculation showed on appropriate result for brewing yeast. 3.Measured reducing sugar of each yeast after a day were observed as follows; CB8l, CB175 and CB89 yeast stain used up 33.3%, 42.6%, 61.1% of reducing sugar , respectively. 4.In ending fermentation, V. D. K(Vicinal Diketones) content and suspension yeast cell number of CB8l yeast strain showed 0.51-0.65ppm and 20-32×106cells/ml, respectively. Those of CB175 yeast strain showed 0.42-0.48ppm and 12-20×106cells/ml, respectively. CB89 yeast strain showed 0.58-0.69ppm and 34×106 cells/ml. 5.In ending fermentation, alcohol content of CB89 yeast was produced 4.55% and 5.05% was higher than that of CB8l and CB175 yeast. 6.CB89 yeast strain also showed about 300% of yeast recovery rate and 5.2% of dead cell rate which were good results.

방향족 화합물 분해균주의 분리 및 동정

정준영,김교창,김도영,도대홍 충북대학교 농업과학기술연구소 1995 農業科學硏究 Vol.12 No.2

Derivation of reasonable design rainfall was attempted by comparative analysis of design rainfall derived by frequency analysis of Type I extremal distribution and probability plotting technique for annual maximum 1-day, 1-hour and 10-minute rainfalls observed at Cheong Ju. The results were analyzed and summarized as follows : 1. Basic statistics were calculated for the analysis of Type I extremal distribution with annual maximum 1-day, 1-hour and 10-minute rainfalls at Cheong Ju. 2. Necessary parameters were derived by frequency analysis of Type I extremal distribution for annual maximum 1-day, 1-hour and 10-minute rainfalls at Cheong Ju. 3. Design annual maximum 1-day, 1-hour and 10-minute rainfalls in mm were derived by frequency analysis of Type I extremal distribution and probability plotting technique respectively at Cheong Ju. 4. Design annual maximum 1-hour and 10-minute rainfalls were derived by frequency analysis of Type I extremal distribution and probability plotting technique are shown to be much closer to the observed data but design annual maximum 1-day rainfall is not to be closer to the observed data. 5. Design annual maximum rainfalls following the duration derived by Type I extremal distribution are seemed to be more reasonable than those of probability plotting technique owing to the difference of individual eyefitting.

非破壞檢査法에 依한 韓國古火器의 硏究

姜榮浩,金永銓 慶北大學校 東洋文化硏究所 1977 東洋文化硏究 Vol.4 No.-

Since Mu-Sun Choi's proposition for making guns(1337AD) we have developed many guns. The investigation for casting technique, internal crack and necessity of repairing on th Korean peculiar guns collected at museum of Korean Military Academy and Kyungpook National University including Cheon-Ja-ChongTong made 1555 AD were performed by the Gamma-ray radiography, source of which were 8 Ci, 6 Ci and 3 Ci of Ir-192. The film used were Dupond NDT 75 and 0.03㎜ lead intensifying screen was used by considering photo-density and discrimination.

점적층 반응기에서 유체의 흐름 및 압력강하에 관한 연구

성기천,김기준,박영규 대진대학교 생산기술연구소 2000 생산기술연구소 논문집 Vol.3 No.-

This experiment was investigated in the reacter of trickle bed with spherical particles. Flow of fluid and pressure drop were measured and analyzed in the air-water system. The results showed that liquid velocity at trickle-pulse transition increased with increasing packing size, and It decreased with decreasing gas velocity, and that theoretical model proposed was well applicable to predicted flow transition boundary. In the same operation conditions, Flow of fluid was changed with operation mode because of liquid closslinking. Therefore, As the maximum gas velocity increased, Pressure drop increased. Also pressure drop increased with increasing fluid velocity, and It increased with decreasing packing size, and the effect of gas velocity on the pressure drop for higher liquid velocity was less than that for lower liquid velocity in this conditions, Correlations in the flow of fluid and pressure drop can show in terms of Reynolds Number of gas and liquid phase.

Serratia liquefaciens AL-11이 생산하는 Alkaline Lipase의 특성 및 작용양상

최청,김태완,안봉전,김영활,손준호,김성,최희준 한국미생물생명공학회 ( 구 한국산업미생물학회 ) 1996 한국미생물·생명공학회지 Vol.24 No.1

본 효소의 최적 반응온도는 약 45℃이고, 최적 pH는 10.0 정도였고, pH 7.0~10.0 범위와 30~50℃의 범위에서 안정하였다. 금속이온중 Mn^2+, Ca^2+ 등에 의하여 활성이 증대되었으나 Fe^2+, Pb^2+와 Zn^2+ 등에 의해서는 효소 활성이 저해되었고, 효소활성 저해제 중 ethylenediaminetetraacetic acid(EDTA)에 의해 강한 저해작용을 나타내어 본 효소는 효소분자 중 금속이온이 관여하는 것으로 추정되었다. 효소반응 처리한 olive oil 가수분해물을 박충크로마토그래피 분석한 결과 Serratia liquefaciens AL-11이 생산하는 지방분해효소는 기질특이성이 비특이적이었으며, sodium cholate, sodium edoxychol-ate, sodium taurocholate 등의 담즙산염에 의해 효소활성이 증대되었다. The optimum temperature and pH for the enzyme activity were 45℃ and 10.0, respectively. The enzyme was stable in a pH range of 5 to 10, and 62% of its activity was lost on heat treatment at 60℃ for 20 min. The activity of the purified enzyme was inhibited by Fe^2+, Zm^2+ and Pb^2+, and slightly activated by Mn^2+ and Ca^2+. γ-Chloromercuribenzoic acid, 2,4-dinitrophenol and H_2O_2 did not show inhibitory effect on the lipolytic activity of the alkaline lipase but ethylenediaminetetraacetic acid inhibited the enzyme activity. This suggested that the enzyme have metal group in its active site. Sodium salts of bile acids stimulated the enzyme activity. Analysis of hydrolyzates of olive oil after the lipase reaction revealed that Serratia liquefaciens AL-11 produced non-specific lipolytic enzyme.

웹 기반 학습에 있어서의 상호작용적 자기조절학습 전략 연구

한건우,김영식,이영준 한국컴퓨터교육학회 2004 컴퓨터교육학회 논문지 Vol.7 No.5

최근 웹 기반 학습의 우수성이 크게 대두되고 여러 방면의 연구들이 진행되고 있으나 학습자의 주도적인 참여를 요구하기 때문에 이를 극복하려는 연구가 필요하다. 본 연구에서는 기존의 웹 기반 학습 시스템이 가지고 있는 결함을 보완하기 위해서 학습 환경을 촉진시키기 위한 자기조절학습 전략을 개발하였다. 자기조절학습 전략은 일반적이고 추상적인 내용으로 구성되어 있어 이를 구체적으로 구현하기 위한 하위 전략들을 도출한다. 또한 좀 더 체계화된 시스템 개발을 위해 하위 전략 요소에 대한 상호작용적 설계를 하여 보다 진보된 웹 기반 학습 시스템을 구축하고 이를 검증하였다. Many web-based learning systems have been developed and used widely. Most of the researches on web-based learning systems assume learners' active participation in the learning activity. However, learners do not always actively participate in the learning. This paper presents a novel self-regulated learning strategy to create a learning environment that encourages learner's active participation. We have derived sub-strategies that can be implemented as a web-based system. The derived sub-strategies have been implemented as an advanced web-base system and are verified by an empirical study.

공침법에 의한 BiDy₂Fe_(5)O_(12) 결정형 나노입자 분말의 제조 및 응용 연구

홍영대,조정환,김태엽,전성욱,홍영명 고신대학교 자연과학연구소 2007 고신대학교 자연과학연구소 논문집 Vol.14 No.-

금속산화물들은 각종 산업재료로서 유용하며 더욱이 그것들의 결정형 나노입자를 경제적으로 제조하는 기술은 21세기 첨단산업에 매우 중요하다. 저자들은 前報에서 화학합성법에 의한 각종 금속산화물의 나노입자를 제조하는 표준공정법을 연구하여 보고하였다. 본 연구에서는 그 표준공정법을 이용하여, 가넷의 일종인 BiDy_(2)Fe_(5)O_(12) 결정 나노입자 분말을 제조하고 그것의 자성체로의 응용을 위해 제품특성을 조사하었다. 가네트 제조과정에 필요한 침전물은 제품설계에 의거 몰비로 계산된 Bi, Dy, Fe의 질산염들의 혼합수용액에 침전제로서 pH NH_(3)-NH_(4)CI 완충용액 일정량을 가하여 얻어졌다. 이렇게 제조된 침전은 열처리과정을 거처 BiDy_(2)Fe_(5)O_(12) 결정형 나노입자 분말로 만들어졌다. 얻어진 제품의 입자크기, 조성, 결정구조 및 광자기성 등 특성시험이 SEM, ICP, XRD, 그리고 VSM 등을 사용하여 실시되었다. 각종 분석법을 사용하여 제품의 특성을 조사한 결과, 최초에 설계한 대로의 자성체가 나노 크기의 분말로 얻어졌으며 이것을 통하여 전보에서 확립한 표준공정법의 유효성도 입증되었다. Metallic oxides are useful as various industrial materials. Futhermore, the cost-effective techniques of fabricating the crystalline nanopartides of metallic oxides are very important for the high-tech industries of the 21 century, In the previous study, the authors reported the standard process for the preparation of crystalline nanoparticles of metallic oxides by chemical synthesis, In this study, BiDyzFesOiz nanoparticles were prepared by using the reported standard process and the characteristics of the product were investigated for applicability as magnetic substance. The precipitation needed for manufacturing process of garnet was made by adding the NH_(3)-NH_(4)CI buffer solution of pH 10 to the mixed solution of bismuth (III) nitrate, dysprosium(III) nitrate and iron(III) nitrate. The amount of each nitrate was calculated by the designed mole ratios. The nano-size crystalline powders of BiDy_(2)Fe_(5)O_(12) were earned by heating the precipitation at 800℃ for 4 hours in air. The characterizations, such as particle size, composition, crystal structure and magneto-optical property of garnet were tested by SEM, ICP, XRD, and VSM analyses. The results of the analyses showed the following two facts. First, a good magnetic substance of BiDy_(2)Fe_(5)O_(12) was earned as crystalline nano-size powders according to the original design. Next, the established standard process for the fabrication of METALLIC oxides nanonartieles was approved as a very effective method.

관동맥 스텐트 삽입후 발생한 스텐트 변연부 박리의 예측인자 및 추가적 치료후 임상적 의의에 관한 연구 : Predictor, Angiographic and Clinical Follow-up after Additional Procedures

두영철,박수종,김재삼,이준호,홍경순,박대균,한규록,오동진,유규형,임종윤,고영박,이광학,이영 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.11

Confocal Raman spectroscopy of single poly(3-methylthiophene) nanotubes

Kim, Hyun-Jun,Kim, Dae-Chul,Kim, Ryun,Kim, Jeongyong,Park, Dong-Hyuk,Kim, Hyun-Seung,Joo, Jinsoo,Suh, Yung Doug American Institute of Physics 2007 JOURNAL OF APPLIED PHYSICS - Vol.101 No.5