정보사회의 노인과 가족

전길양,김태현 성신여자대학교 생활문화연구소 2001 生活文化硏究 Vol.15 No.-

This study is focused on the importance of the aged and family life according to social change have been affected by information telecommunication technology. Korean society has been rapidly changing to the aged and information society. In our society, the aged person needs for money, health, psychological solitude, and leisure to keep the successful family life and aging. The telecommunication technology may apply to a lot of fields in the aged life. In particular, the surpass of time and space limit by the telecommunication could supply on-demand service for the acted needs. But, the strategies for enhancing information of the aged are insufficient in our society. Therefore, for enhancing the quality of living of the aged, It is needed to develop internet slues and contents which are focused on the population.

복합사이클 발전소의 효율에 관한 연구

전철호,장길홍 동아대학교 공과대학 부설 한국자원개발연구소 1993 硏究報告 Vol.17 No.2

The use of a combined cycle leads to an updating of power output, at the same time, increasing power plant efficiency. In this paper, the dissipation energy was calculated from two conventional and combined cycle processes, and then the efficiencies of many types of the combined cycle were compared. The efficiency of combined cycle power plant is evaluated by given data and its performance characteristics from the simulation. As a result, the total efficiency is increased as the compression ratio is increased.

溫膽湯 煎湯液이 心臟機能에 미치는 影響

任俊模,文炳淳,金世吉 圓光大學校 韓醫學硏究所 1993 원광한의학 Vol.3 No.1

The present experiment was designed to investigate the effects of Ondamtang(溫膽蕩) on the heart function. And thus the blood preassure and heart rate were measured after injecting the drug and bile. In order to understand the action mechanism of the Ondamtang on the cardiac muscle cell, Mg^2+ -Ca^2+ -ATPase activity and Na^+ -K^+ -ATPase activity at the presence of the drug were also measured. The results were obtained as follows : 1. Ondamtang decreased the blood pressure in the anesthetic rabbits. 2. It seems that Ondamtang doesn't stimulate the antonomic nerves for decreasing the blood pressure and heart rate. 3. Ondamtang activated the Mg^2+ -Ca^2+ -ATPase activity of cardiac sarcoplasmic reticulum, therefore Ca2+ ions of sarcoplasm reticulum were concentrated into the membrane system. 4. Ondamtang inhibited the Na^+ -K^+ -ATPase activity of brain cortex nerve cell. 5. Bile injection decreased the blood pressure and heart rate. According to the above results, Ondamtang inhibits the cardiac muscle contraction and nerve conduction, on the other hand the drug changes the bile content and thus decreases the blood pressure.

카오스 특징 추출에 의한 스테인레스강의 재질 열화 평가

고준빈,오상균,김기길 大田産業大學校 1998 한밭대학교 논문집 Vol.15 No.1

This study proposes the analysis method of time series ultrasonic signal using the chaotic feature extraction for degradation extent evaluation The features extracted from time series data using the chaotic time series signal analyzes quantitatively degradation extent. For this purpose, analysis objective in this study is correlation dimension, lyapunov exponent, strange attractor on hyperspace. The lyapunov exponent is a measure of the rate at which nearby trajectories in phase space diverge. Chaotic trajectories have at least one positive lyapunov exponent. The correlation dimension appears as a metric space such as the phase space trajectory of a dynamical system. In this experiment, correlation(fractal) dimensions, lyapunov exponents, energy variation showed values of 2.217~2.423, 0.097~0.154, 1.601~1.476 voltage according to degardation extent. The proposed chaotic feature extraction in this study can enhance the degree of precise evaluation of the degraded materials(SA508 CL.3).

영어학습에 있어서 듣기 우선의 당위성

김준길 건국대학교 1995 대학원 학술논문집 Vol.40 No.-

The improement of listening comprehension ability has recently become one of the most important aspeds of language skills because of rapid communication development. Listening comprehension is the first of the four skills of teaching foreign languages, so no communication can be accomplished without listening cornprehension. This paper is designed to prove that listening first is necessary and important as the natural strategy for learning English, to find Koreans'difficulties in English listening comprehension and to establish ways to improve Koreans'listerling comprehension ability of English. As a result, the present study has reached the following conclusion. ' 1.In teaching English, we should especially put more emphasis improving listening comprehenson ability, because listening skill is of primary importance. 2.The factors affecting listening comprehension most are as follows : listeler's practice opportumity, speaker's speed of delivery, listener's vocabulary power, and listener's familiarity with the content of the text. 3.To improve Koreans'listening comprehension of Elglish more emphasis should be placed on sound discrimination practice, the study of vocabulary, dictation, and reading at normal speed. The understanding of soiocultural patterns of American though will help to improve listening skill, too. 4.English teachers should have good listening comprehension ability and pay close attention to the students'emotional and accoustic envinument in the classrocrm because they affect students' listening comprehension.

니트섬유강화 복합재료의 기계적 성질에 관한 연구

한길영,이동기,최병기,오환교,신용욱,전수영 조선대학교 에너지.자원신기술연구소 1999 에너지·자원신기술연구소 논문지 Vol.21 No.2

Using conventional textile techniques such as weaving, braiding, knitting and stitching it is possible to produce a wide range two and three dimensional fiber preforms. However, so far only a limited attention has been given to knitted fabrics in composite industry. This is mainly due to the opinion that knitted fabric reinforced composites posses low mechanical properties owing to their looped fiber architecture. But it is possible to obtain desired mechanical properties by selecting proper knitted fabric structure. In this paper, tensile failure load and displacement of one yarn, four yarns and knitted fabrics of ten yarns of kevlar fiber were determined experimentally in the unidirection. Mechanical properties of plain weft knitted fabrics reinforced composite intrusion beam for car side door application were investigated experimentally, which compared with desire value of American Fedral Motor vehicles Safety Standard (FMVSS) and presented the results.

Streptomyces thermocyaneoviolaceus의 Xylanase 생산조건 및 Xylooligo당의 생산

주길재,박희동,최준호,이인구,이오석,권달호 慶北大學校農業科學技術硏究所 1998 慶北大農學誌 Vol.16 No.-

농산폐자원으로부터 기능성물질인 xylooligo당을 생산하기 위해서 내열성 균주인 S.thermocyaneoviolaceus가 생산하는 xylanase의 생산최적조건을 검토한 결과 0.8% 밀기울, 0.06% yeast extract, 0.06% bactopeptone, 0.05% MgSO₄·7H₂O, 0.005% FeSO₄·7H₂O, 0.05% KH₂PO₄및 0.2% K₂HPO₄를 함유한 배지(pH7.0)에서 50℃, 24시간 배양시 최고효소활성(2.47 unit/ml)의 배양상징액을 얻을 수 있었다. 효소의 최적반응조건은 pH5.5, 65℃였다. 또한 pH안정성을 조사한 결과 pH4.5∼9.5사이에서 4℃에서 12시간후에도 80% 이상의 효소활성을 유지하였고, 열 안정성은 60℃에서 1시간 처리후 94%이상의 효소활성을 유지하는 내열성이 있는 효소였다. 생산된 xylanase birchwood xylan 반응생성물을 TLC 및 HPLC로 확인해 본 결과, pH가 낮을수록(pH 5.0∼6.0) xylobiose와 xylotriose및 소량의 xylose의 양이 증가하였고, pH가 높을수록 (pH8.0∼9.0) X₄이상의 각종 xylooligo당의 양이 상대적으로 증가하였다. 또한 24 시간후에는 xylan의 상대량이 25% 이하로 감소하면서 주분해산물로 xylobiose가 생산되었으며 xylotriose와 xylose 및 X₄이상의 각종 xylooligo당이 생산되었다. A thermotolerant bacterium, Streptomyces thermocyaneoviolaceus which produced xylan-degrading enzymes, utilized excellently xylan of wheat bran by producing the enzymes in comparison with that of birchwood or oat spelts. Optimal enzyme production was achieved in WB medium containing 0.8% wheat bran, 0.06% yeast extract, 0.06% bactopeptone, 0.05% MgSO₄·7H₂O, 0.05% FeSO₄·7H₂O, 0.05% KH₂PO₄ and, 0.2% K₂HPO₄(pH 7.0) at 50℃ for 24 hrs. The optimal pH and temperature for the hydrolysis of xylan were pH 5.5 and 65℃, respectively. The enzyme activity was retained more than 80% at the range from pH 4.5 to pH 9.5 at 4℃ for 12 hrs and 94% on the heat-treatment at 65℃ for 1 hr. Xylobiose, xylotriose, xylose, and other xylooligosaccharides were produced as end products from hydrolysis of birchwood xylan by the xylanase of S. thermocyaneoviolceus.

중·고등학교 유도선수들의 성취목표 성향이 귀인유형에 미치는 영향

천길영,전기영 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.14 No.4

Recent trends, the major objective of this investigation was to examine the effect on judo players achievement goal orientation of middle and high school on attribution styles. Subjects were 107 judo players in the middle and high school. Tools were used to TEOSQ and attribution scale. Results revealed that when they perceived task as success, task-and ego-directed goal orientation had significant effect on effort and ability respectively. This results were discussed in terms of the three-dimensional achievement goal orientation, earned helplessness, and implicit theory of Dweck(1988) as future studies.

초등학교에서 에너지의 합리적 사용을 위한 STS 프로그램의 개발과 적용 효과

최상길,김채복,최준섭 韓國實科敎育硏究學會 2002 實科敎育硏究 Vol.8 No.1

The purpose of this study was to develop STS teaching-learning program which focuses on real-life experiences for reasonable energy usage, and to verify how STS teaching-learning program affects the understanding knowledge concerned energy and the attitude towards saving energy. The subjects of this study were students of the 6th grade at an elementary school in Kyong-Ju. They were divided into two groups, an experimental group and a control roup. The developed STS teaching-learning program had been applied to the experimental group. However, the traditional teaching-learning process had been employed to the control group for four weeks. The main results of this study are as follows : (1) The developed STS teaching-learning program consists of following subjects ; energy resources, growing energy consumption, heat-energy transfer, energy and environment, saving energy, efficient usage of electricity and opening ‘ANABADA’ market. (2) In the understanding of knowledge concerned energy, there was no difference between the experimental group and control group. (3) In the attitude toward saving energy, there was a considerable significant difference between he experimental group and control group. However, there was no difference between male and female students, respectively.

發癌物質과 非發癌物質의 DNA-Modifying Activity에 대한 量子生物學的 解釋

李佶俊,林周相,宋寧大,徐榮培,朴柄珏 嶺南大學校 基礎科學硏究所 1990 基礎科學硏究 Vol.10 No.-

LCAOMO calculation has been carried out for thirty chemical carcinogens and nine metabolites of them. The LUMO electron density which is a measure of ability electron to be accepted and observed DNA-Modifying activity which is a measure of mutation relationship was considered. It was found that the sum of LUMO electron density of 1, 2, 4-positions of a relevant trans-butadiene type (F??) in the compound was correlative to DNA-Modifying activity. This means that carcinogenesis closely relate to mutagensis, since the LUMO electron density is a measure of carcinogenic activity of carcinogens as shown earlier. It was also found that LUMO electron density of 1, 2, 4-positions in compounds increase with their metabolic activation. This is in agreement with the experimental result that carcinogen is more electrophilic as metabolic activation. In conclusion, it may be possible to give a theoretical interpretation on the mutation of chemical carcinogens and explain theoretically the fact that the compound have a strong elestrophilicity on metabolic activation.