• 대한가정학회지
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• 제34권5호
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• pp.283-292
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• 1996

This study examines the character of "Tencel" named as Ecology Fiber and investigates the fitness of it as the textile and the satisfaction in dress when its fastness is compared with that of Rayon classified into Celulose textile. Dye experiment selected 100% Tencel, Rayon for the samples, which were dyed into the direct dye and Turky Blue and Blue of the rective dye and were washed twelve times by the automatic washer. After that, the dye experiment examines the light, laundering, perspiration, rubbing and the composite fastness of the perspiration and hight in the lists of the dye fastness. The results are as follows: 1. The experiment of the color fastness, especially in T-blue of the direct dyestuff, requiring the twelve times-repeatedly-washing by the detergent says that the color fastness of Tencel is superior to that of the cellulose textile ; Rayon. 2. The experiment of the light fastness says that the fastness of Tencel is superior to that of Rayon. 3. The experiment of the laundering fastness says that all of Tencel, Rayon shows the excellent result in the direct dye than in the reactive dye. 4. The experiment of the rubbing fastness says that although Tencel, Rayon show the remarkable result in the desiccant experiment than in the humid one, the rubbing fastness of Tencel is superior to that of others. 5. The experiment of perspiration fastness says that Tencel, Rayon have the closely tightened tendency not to be altered through the acid and alkali perspirations. 6. The experiment of the composite fastness of perspiration and light indicates that the artifical perspirations, though the light lets the fastness of textiles weeken, do very slightly make them loosen, which does not offer the outstanding result. This whole result show that the fastness of Tencel is superior to that of Rayon. The Korean Fiber Enterprise in clothing should make the new and ecological fiber "Tencel" by means of the large amount of investment, and the technique of handing and controlling about it, considering that the dangerous needle of environmental pollution has been slackening the close-related ecological knots of the global environment. global environment.

• 한국표면공학회지
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• 제25권3호
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• pp.117-125
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• 1992

In the electrolysis process of zinc plating impurity ions must be removed from zinc chloride plating solution because it's harmful to the current efficiency and the purity of zinc plating. In this study using zinc ball as a prcipitant instead of zinc dust, the fundamental data for continuous cementation process was studied. Based upon two series of experiments that consist of batch experiment with cylindrical zinc specimen and continuous experiment with zinc balls, following results have been obtained. In the continuous experiment all impurity ions have been removed within 1 hour regardless of various experimental conditions.

• 한국실내디자인학회논문집
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• 제23권1호
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• pp.122-131
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• 2014

This study aimed to conduct an eye-tracking experiment carried with facade images as a medium and to do research on 'the interest of the eyes' resulted from people's gazing phenomena. This study secured gazing data which appeared according to visual response and analyzed gazing phenomena to find the basic theory of 'the interest of the eyes' as a methodological role, which consumer interest and attention could be grafted when a plan and a design for space design was made. Data terms used in eye-tracking backgrounds and the movement of the eyes were investigated in literature review. Twenty (20) facade images were selected through a case study to get experimental stimuli for the related experiment. Thirty (30) subjects (men and women) suitable for the experiment were recruited to conduct an eye-tracking experiment. After the experiment, five (5) areas were set up in the facade image to identify the focus level of interest and attention. The level of interest and focus was connected to the interest of the eyes. The analysis to study the interest of the eyes was based on nine (9) items such as sequence, entry time, dwell time, hit ratio, revisits, revisitors, average fixation, first fixation and fixation count. Through gaze analysis, the following conclusion was drawn about the 'interest level of sight' for gaze frequency. The interest level can be interpreted to be higher for faster sequence, shorter entry time, longer all fixation(ms) for dwell time, faster all saccade(%), higher hit ratio, more revisits, more revisitors, longer average fixation, faster and longer first fixation, and more fixation count, and the person can be said to have felt interest faster and/or more.

• Journal of Nutrition and Health
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• 제9권3호
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• pp.8-17
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• 1976

This study was carried out to estimate the minimum protein requirement for the Korean college girls, and to see the effect of carbohydrate intake on the minimum protein requirement in the rat. In the first experiment, three students attending Ewha Womans University were given protein free diet for 7 days while caloric intake were adjusted to maintain constant body weight. Endogenous nitrogen excretion was measured to estimate their minimum protein requirement. Second experiment was carried out in 3 parts to find out the effect of carbohydrate intake on the minimum protein requirement using 15 female, 50 days old rats weighing 120g. Inexperiment 2-1, the rats were fed protein free diet for 9 days and endogenous nitrogen excretion was measured to determine the minimum protein requirement of the rats. In experiment 2-2, the minimum casein requirement of the rats needed to maintain nitrogen equilibrium was estimated by the least squares regression method feeding 3 different levels of casein determined from the result of experiment 2-1. Finally, in experiment 2-3, the rats were given the minimum casein requirement for 7 days with 3 different levels of carbohydrate to find out the effect of carbohydrate intake on the nitrogen balance. The results of this study were as follows. Experiment I. Daily endogenous nitrogen losses of 3 college girls were 1.89g in urine, 1.10g in feces and 0.0108g from skin since the total daily endogenous nitrogen loss was 3.0g and the total daily nitrogen intake was 0.52g, the minimum nitrogen requirement of these subjects was about 2.48g/day (15.5g protein/day). Experiment II. Experiment 2-1: daily endogenous nitrogen losses of the rats fed protein free diet were $22.63{\pm}0.48\;mg$ through urine and $13.12{\pm}0.47\;mg$ in feces. The total daily endogenous nitrogen ouput was $35.71{\pm}1.27\;mg$ and the minimum protein requirement of the rats was 225mg/day in this study. Experiment 2-2: the minimum casein requirement needed to maintain the rats in nitrogen equilibrium was determined to be 340mg/day. Experiment 2-3: the rats were given 350mg/day casein with 3 different levels of carbohydrate (12,26 or 46 Cal by sugar-cornstarch mixture). The nitrogen balances were measured to be +0.0021, +0.0073 and +0.0143 respectively and there were significant differences among 3 groups.

• 공학교육연구
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• 제23권3호
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• pp.32-40
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• 2020

A new moment of inertia experiment apparatus different from the existing one has been developed, which does not require deformation of a sample in order to fix it to the apparatus. This new experiment apparatus was able to experiment with constant-shaped objects that did not deform the samples, so that it enabled them for conducting an experiment which is close to an ideal rigid model dealt in the general physics course. The new experimental apparatus was easy and accurate in measuring the physical quantity by using the experimental principle of physical pendulum. In the results of the measurement of the moments of inertia of the six samples, all measurements were made to be accurate enough to measure with very small errors within 1%. In addition, it has been found to be useful as an experiment apparatus to understand the concept of the moment of inertia and to prove the formula for moment of inertia. Therefore, if the new moment of inertia experiment apparatus developed in this study is used in students' experiments, it is expected that students will be able to greatly increase their understanding of the concept of moment of inertia.

• 한국과학교육학회지
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• 제35권6호
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• pp.997-1006
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• 2015

실험에 대한 메타적 인식은 학생들의 과학적 탐구와 과학의 본성에 대한 이해의 중요한 요소 중 하나이다. 이 연구에서는 중학생과 고등학생의 과학과 생물에서의 '실험'의 의미에 대한 인식을 알아보았다. 특히 이 연구에서는 언어 네트워크 분석방법을 사용하여 학생들의 인식을 구조적으로 확인하였다. 이 연구를 위해 190명의 중학생과 200명의 고등학생 이 연구에 참여하였다. 학생들은 과학에서의 '실험'과 생물에서의 '실험'의 의미에 대한 두 문항에 서술형으로 응답하였다. 수집된 응답을 바탕으로 총 4개의 언어 네트워크가 구성되었다. 연구 결과, 과학에서의 '실험'에 대하여 중학생들은 '우리', '직접', '원리' 등의 단어를 중심으로 활동적 측면에서의 실험을 인식하였다. 반면 고등학생은 '이론', '사실', '내용' 등의 단어를 중심으로 지식을 생성하는 탐구과정으로서의 실험으로 인식하였다. 또한 생물에서의 '실험'에 대하여 중학생은 '해부', '몸'을 중심으로, 고등학생은 '생명', '관찰'이 중심으로 인식하여 생명체를 다루는 관찰활동으로 인식하였다. 이러한 연구결과는 앞으로 과학 교과 및 생물 교과에서 실험을 지도하는데 있어서 중요한 근거자료로 활용될 수 있을 것이다.

• 한국작물학회:학술대회논문집
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• 한국작물학회 1994년도 춘계 학술대회지
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• pp.70-71
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• 1994

• 한국작물학회:학술대회논문집
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• 한국작물학회 1990년도 춘계 학술대회지
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• pp.20-21
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• 1990

• 한국작물학회:학술대회논문집
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• 한국작물학회 1990년도 춘계 학술대회지
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• pp.22-23
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• 1990

• 한국식물병리학회:학술대회논문집
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• 한국식물병리학회 2000년도 추계 학술발표회
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• pp.67.1-67
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• 2000