Welcoming Address 1

Byun,Jae-Il 정보통신정책연구원 2003 세미나및공청회 Vol.2003 No.

사과나무 光合成特性에 미치는 溫度의 影響

卞在均 대구효성가톨릭대학교 1978 연구논문집 Vol.20 No.1

The effects of temperature on the photosynthetic speed of apple trees(Malus domestica B.) were determined by using one year old golden Delicious apple trees planted in pot in a temperature range, 10 to 35℃. Optimum temperature for net photosynthesis was 15℃ in July and September bu 10℃ in October and November. Under 20,000 to 30,000 Lux light condition in growth cabinet, the maximum speed of apparent photo synthesis was 12.1mgCO?/dm?/hr at 15℃ in July, but 5.69mgCO?/dm?/hr at 10℃ in November. the speed of true photosynthesis change slightly by temperature condition. the increasing rate of respiration, as the temperature increased, was higher in September and October than in July. The speed of apparent photosynthesis per leaf was high in September and October, but it was decreased significantly in November. This phenomenon means that the speed of photosynthesis decrease rapidly in leaf senescence stage.

교사의 단계적 발문이 학습자의 수학적 사고에 미치는 효과

변재현,김민경 이화여자대학교 사범대학 교과교육연구소 2004 교과교육학연구 Vol.8 No.2

본 연구는 초등학교 4학년 아동의 수학학습에 있어서 교사의 단계적 발문을 적용한 교수-학습 방법이 학습자의 수학적 사고 능력을 향상시키는지 알아보는데 그 목적을 두었다. 그리하여 초등학교 수학교육에서 교사의 단계적 발문을 적용한 교수-학습 과정안을 구성하고 적용하여 초등학교 4학년 아동의 수학적 사고 능력을 향상시키는지 분석해 봄으로써 본 학습 방안의 효과를 보고자 하였다. 본 연구에서 설정된 연구 문제는 교사의 단계적 발문을 적용한 수학학습을 실시한 집단과 일반적인 수학학습을 실시한 비교집단간의 수학적 사고 능력(표현의 사고, 조작적 사고, 기본 성질의 사고, 발전적 사고, 단순화 사고)에 차이가 나타나는지 알아보고, 또 학업성취 상·하 집단별로 차이가 나타나는지 알아보고자 하였다. 그 결과 교사의 단계적 발문을 적용한 수학학습을 실시한 실험집단의 경우 수학적 사고 능력에서 평균점수가 비교집단보다 향상되었고 통계적으로도 유의미한 차이가 나타났다. 표현의 사고, 조작적 사고, 기본 성질의 사고, 발전적 사고, 단순화 사고에서는 표현의 사고를 제외한 4가지 사고에서는 유의미한 차이가 나타났다. 또한 학업성취 상·하 집단별 수학적 사고 능력은 상위집단에서는 유의미한 차이가 나타나지 않았으나 하위집단에서는 유의미한 차이가 나타났다. 결론적으로 교사의 단계적 발문은 수학적 사고 능력을 향상시키는 방법으로써 효과가 있었다. 이는 매 수업시간의 교사의 단계적 발문을 활용한 수업을 통해서 수학적 사고를 경험하게 되었으며 이러한 경험이 누적되면서 아동 스스로가 적극적인 수학적 사고 능력을 갖추게 되었다고 할 수 있다. The purpose of this study is to improve learners' mathematical thought ability through teaching-learning method used teachers' systematic questions in mathematics learning of 4th grade students in elementary school. Mathematics learning has been regarded as explanatory·cramming education and simple solving the problems which has more emphasis on the result than the process. As a result, in case of an experimental group used a teacher's systematic questions, the average marks were more improved than those of comparative group in mathematical thought ability and there was significant difference statistically. And there was significant difference in operative, developmental thought and the thought of basic characters and simplification except the thought of expression. Also in a low group, there was meaningful difference about mathematical thought ability in learning achievement but not in a high group. It is concluded that mathematics learning used a teacher's systematic questions was effective in the improvement of mathematical thought ability. That is, a teacher's questions in class can improve mathematical attitude, thought, and knowledge·function gradually. Therefore mathematical learning used a teacher's systematic questions was said to give positive influence in the improvement not only mathematics learning attitude but also mathematical knowledge·function by improving mathematical thought ability systematically.

信賴性 制約條件을 고려한 鋼材 트러스構造의 最適設計

邊根周,韓相勳,梁在成 연세대학교 산업기술연구소 1982 논문집 Vol.14 No.1

The reliability analysis of truss members is considered and a relationship between the reliability and the optimization is established. The applications of optimization techniques to the minimum weight design of the trusses are discussed. Finally a optimization algorithm of designing truss members for minimum weight to obtain a specified reliability index is presented. The reliability based optimum design of plane truss structures is conidered on some detail. The crosssectional dimensions of the structures are considered as random design variables. The constrained opti-mization problems are solved by using the SUMT (Modified Newton-Raphson Method) and the Rosenbrock's Hill technique. Numerical examples are presented to illustrate the computationl effectiveness of the two algorithms presented. It has been obesrved that the SUMT algorithm may be considered as a very efficient and accurate solution technique in the structural optimum design problem with the reliability constraints.

사과 N 管養에 關한 硏究 : (1)Studies on the Effect of Post Harvest Urea Leaf Spray in the Apple Trees under high Nitrogen Level 1.主産地 사과園의 收穫後 尿素 葉面施肥 效果에 關한 再檢討

卞在均 대구효성가톨릭대학교 1970 연구논문집 Vol.6 No.1

High amounts of fertilizer commonly has been applied to the main apple orchard districts in Korea, however, post harvest urea leaf spray has been recommended also in these districts. Author investigated the effects of post harvest urea leaf spray on the apple trees under high nitrogen level. The experiments were carried out using Jonathan Variety in Suwon 1967 and Taegu 1968, were are located middle and southern part of Korea, respectively. The results obtained were summarized as follows. 1) Total N content in the leaves, spur buds in that late fall and in leaves in the next spring, which has been sprayed with 0.5% and 4% urea after havest, was increased. 2) The nitrogen was translocated from leaves to spur buds in 4 days after urea leaf spray and the higher concentration of urea sprayed, the more nitrogen contained in the spur buds 3) Post harvest urea soil application did not increase nitrogen content in the spur buds in that fall and cluster leaves in the next spring. 4) Increment of nitrogen in the leaves, spur buds and cluster leaves as a result of post harvest urea leaf spray did not respond with the flowering, fruit set, shoot growth, fruit development and electroconductivity in the apple trees under high nitrogen level.

梨 柚膚果現象 抵抗性台木(Pyrus betulaefolia B.)과 感受性台木(Pyrus serotina R.)의 水分 및 鹽基의 吸收에 關한 硏究

卞在均 대구효성가톨릭대학교 1978 연구논문집 Vol.20 No.1

In order to clarify the difference between the physiological activities of resistant rootstock, Pyrus betulaefolia (P.b) and susceptible one, Pyrus serotina (P.s) in response to physiological disorder, so called "Yubu fruit", this experiment was conducted. Pear trees cv. "Isipseki" used in experiment were grafted on P. betulaefolia and P. serotina, and then they cultivated in pot during 3 years. The results obtained are as follows: (1) The rootstock P.b absorbed more water and cations(Ca??, Mg??, K?) than P.s, and the difference of absorption between two rootstocks was great in early growing season. (2) Concerning to ratio between absorbed cations, Ca??/K? and Ca?//Mg?? were high in P.b, but Mg/K did not shown these tendency. (3) Superior absorbing power in P.b rootstock was revealed greatly in volcanic ash than sand soil. (4) According to soil dryness, absorption of water and cations was decreased significantly regardless of rootstocks. (5) As compared with xylem of roots in both rootstocks, the hole size of vessels was larger in P.b than P.s.

돼지에서 창상치유에 대한 키토산의 영향

변홍섭,김명진,이재연,조성환,박창식,김명철 충남대학교 형질전환복제돼지연구센터 2007 논문집 Vol. No.10

The objective of this study was to investigate the effects of implanted chitosan applied to surgically created wound in pigs. Six healthy 2∼3 months old Landrace and Yorkshire mixed breeds of both genders were used. A 2 cm straight skin incision was made and undermined skin (2×2cm) over on the each pig's both sides of dorsal midline at 0, 7. 14 and 18 days. One wound (left side) was implanted 0.4 mg of cotton type chitosan and other wound was treated saline (3ml). Each wound was closed with two interrupted suture of 2-0 sutures. The wounds created at 18. 14.7 and 0 days were named post-wounding day (PWD) 3, 7, 14 and 21, respectively. At 21 days after initial wounding, each wound was taken for histological observations. Reepithelialization tended to be greater in the chitosan group than in the control group at PWD 3 and 14. Granulation tissue formation did not show especial differences in two groups. Number of inflammatory cells was lesser statistically in level in the chitosan group than those in the control group at 21 days after wounding (p<0.05). Fibroblasts and neovasculature tended to be greater in the chitosan group than in the control group at PWD 3 and 7, and tended to be lesser in the chitosan group than in the control group at PWD 14 and 21. Collagen and fibrin were observed to be evenly distributed around the wound in the chitosan group. But collagen and fibrin were observed to be converged along the wound in the control group.

사과 및 배 果實의 肥大와 成熟에 미치는 生長調節濟들의 影響

卞在均 대구효성가톨릭대학교' 1979 연구논문집 Vol.21 No.2

In order to study the effect of gibberellin (GA4×7 ) with or without benzyladenine (BA) treatments on the fruit development of apple (Malus domestica B.) and pear (Pyrus serotina R.), this experiment was carried out. 6-years old, grafted on M26 rootstock, 'Orei', 'Fuji', 'Starkimson' and 'Jonathan' cultivars in apple, and 15-years old 'Changsiprang' and 'Mansamgil' cultivars in pear were used for this experiment. Lanolin paste of GA4×7 and BA was applied to the fruit stalks on May 21 and 31 in apples, May 26 in pears. Rapid fruit development occured 10 days after the treatment regardless of the varieties in apple. No difference in fruit diameter and weight was observed between the GA4×7 1500ppm with and without BA 600ppm treatment. 3000ppm of GA4×7 treatment was the most effective in 'Orei' and 'Fuji' cultivars, but no difference between 150ppm and 3000ppm in 'Starkrimson' cultivar. Although the initial development in fruits treated with GA4×7 was very rapid, the difference of fruit size at harvest was not great compared with at the early stage of fruit development.

신체활동 참여가 노인의 주관적 건강지수에 미치는 영향

변재종 우송대학교 2003 우송대학교 논문집 Vol.8 No.-

This study was designed to investigate the effect of exercise participates on health profiles of the older adults in nursing home. The subjects for this study were seventy two(male: 25, female: 47) healthy elderly people who were the members of seniors' tower in song-do hospital, didn't have any problems in participating in this study exercise program. The subjects were divided into four groups: GroupⅠ participated in exercise program daily(N=19), GroupⅡ participated in exercise program 2 or 3 times a week(N=19), GroupfⅢ participated in exercise program once a week(N=19) and GroupⅣ never participated in exercise program(N=15). Three groups have been trained for 6 months. The exercise program for three groups was made up of warm-up, work-out, and cool-down. Stretching was performed every ten minutes for the prevention of injuries which could occur during the main exercise and quick recovery of the used muscle. Aerobic training was performed for 20-40 minute respectively using the treadmill and cycle ergometer at the intensity of 60% VO₂max. The resistance weight training was performed 10times repeatedly(12-15RM) by 2 sets using the leg press, leg extension, leg curl, back extension, abdominal flexion, and torso. One repetition maximum(1RM) of each person was measured prior to the training performance. All the measured data were represented by mean(M) and standard deviation(SD) using version 6.12 SAS package. The statistical techniques for health profile data analysis were two way ANOVA to analyze the difference among groups. And then I performed one way ANOVA for examing the difference among groups about the variables which showed the difference. The 5% level of significance was used as the critical level for acceptance of hypotheses for the study. The following results were obtained from this study. The comparison of health profile's variables after participating in the exercise program. In health profiles's variables, the social isolation level and physical mobility level of Group I were higher than the other three groups.

녹차에 대한 인식 및 이용실태에 관한 연구

변재옥,한재숙 한국식생활문화학회 2004 韓國食生活文化學會誌 Vol.19 No.2

This study was conducted to investigate the perception and using behavior for the Green Tea by a survey. The subjects of this study were consisted of 43.1% of males and 56.9% of females in Daegu city and Gyeong-Sang Buk-Do Province. The main results are as follows : About 85.9% of the participants preferred the Green Tea owing to good for health but the others didn't like owing to not delicious. 51.1% of the subjects had one cup of Green Tea per day. The responses to the 13 questions of the Green Tea were measured on 5 point Likert scale. The item 'Green Tea is natural food' received the highest point but 'Green Tea is delicious' received the lowest. About one half of total subjects knew how to make the Green Tea and 40.4% of them learned the recipes from their mother. About 63.7% replied 'Increasing' prospects for the Green Tea consumption. About 53.7% said the plan should be 'made of good quality Green Tea' for the purpose of better improvement and extention of consumption.