• The Journal of the Korea Contents Association
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• v.15 no.11
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• pp.658-671
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• 2015

The present study explores the effect of blended action learning program on the improvement of the self-directed learning skills of university students. For this, students in the college of education at D University located in the capital area were selected to form 30 students of the experimental group and 30 of the control group. The average age of the subjects is 22.3. They are students in the $2^{nd}$ to $4^{th}$ year of university and the demographic background is relatively homogeneous. The experiment was conducted in the Sociology of Education class (a teacher training course). The self-directed learning skills were pre-tested at the beginning of the term. After that, the experimental group had the class with blended action learning program, and the control group had the class with action learning program. The post-test was carried out at the end of the term. For data analysis, ANCOVA was carried out to compare the scores on post-test of the two groups in consideration of the scores on the pre-test. The results show that first, for the improvement of self-directed learning skills of university students, blended action learning program is more effective than action learning program. Second, in the class for learners with lower degree of cognition and experience, blended action learning program was more effective than action learning program. Third, in terms of management of learning resources and utilization of learning strategies, both action learning program and blended action learning program were not effective. In summary, for improvement of the self-directed learning skills of university students, action learning program, which is a learning method focused on learner's participation and practice, is more effective than the traditional collective lecture among diverse teaching methods. Yet in consideration of the elementary level of university students in terms of intelligence and experience, active use of blended action learning program is required.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.3
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• pp.485-492
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• 2017

This study was conducted to identify the preservice teacher's health perception and health promoting behavior, and attitudes towards children with asthma, as well as to examine the relationship between these variables and the influencing factors. The participants were 329 third and fourth grade students from the national university of education in G city. The data were analyzed using Pearson correlation coefficients, t-test, ANOVA, Scheffe test, and multiple regression with SPSS/WIN 23.0. The score for the participants' health perception was 2.85 out of a possible 4, health promoting behavior about 2.49 out of a possible 4, and their score for attitude towards asthma was 3.67 points of a possible 5. The health perception and health promoting behavior showed a positive correlation with the attitudes about child with asthma. Interpersonal relations and health perception and grade had a significant influence on the attitudes about child with asthma. These variables accounted for 12.2% of the attitudes about child with asthma. The results highlight the need for intervention strategies to enhance the health promoting behavior and health perception.

• The Korean Journal of Zoology
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• v.17 no.1
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• pp.5-16
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• 1974

In order to see the single effect and interaction of potassium chloride(KCI) and calcium the chloride ($CaCl_2$) on the development of Drosophila melanogaster, the emergence rates of the five strains of the flies were examined from the media containing 0.0M, 0.5M, 0.1M, 0.2M, of $CaCl_2$ or KCI plus various concentrations of KCI or $CaCl_2$, and the results are presented as follows: 1. The emergence rate of D. melanogaster is not significantly different among strains but strikingly different among concentrations of KCI or $CaCl_2$; the emergence rate decreases as concentration of KCI or $CaCl_2$ increases. 2. The inhibitory effect of $CaCl_2$ on the emergence rates is greater than that of KCI, implying that the resistibility of the flies to KCI is greater than to $CaCl_2$. 3. The addition of small amount of $CaCl_2$ or KCI to KCI or $CaCl_2$ media counteracts the inhibitory effect of KCI or $CaCl_2$, but the addition of a little greater amounts of $CaCl_2$ or KCI to the KCI or $CaCl_2$ media enhance the inhibitory effect of the salts. 4. Thus, there may be some interaction of $K^+$ and $Ca^++$ ions in the inhibitory effect on the development(emergence rates) of Drosophila melanogaster.

• Journal of The Korean Association For Science Education
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• v.19 no.4
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• pp.507-515
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• 1999

This study is to develope the performance scoring rubrics for the inquiry-based experiments of general chemistry course in the college of education. Two types of analytic scoring rubrics have been developed for nine different experiments. The first one is to assess scientific process skills from the written experimental reports. These analytic scoring rubrics include seven process skills selected from the Lawson's 'creative and critical thinking skills' and other known process skills. The second one is to assess the individual manipulative skills and experimental attitudes through direct observations by the teacher. The content validity of all scoring rubrics was testified by six science educators. Also the inter-scorer reliability of analytic scoring rubrics administered on the students' experimental reports was examined. The correlation coefficient between the scores obtained from the experiments and those of the written test for theoretical knowledges was found to be r=.663(p <.01). From the variance($r^2$=.440), we would say indirectly that the 56% of this experimental assessment does not overlap with the theoretical knowledges test and assesses students' science process skills, manipulative skills, and attitudes.

• Journal of Nutrition and Health
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• v.9 no.2
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• pp.40-53
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• 1976

This study was designed to comparse the metabolic effects of Korean diet pattern which contained all-polished rice and 70% polished rice, and to compare dietary restriction. The results were as follows. 1. Food intake survey to catch the Korean diet pattern The calory intake showed women took much more than men and farm village was higher than city, However, protein intake showed men were higher than women and decrease gradually from city, fishing village, and farm village. Calcium intake showed Seoul was the first rank of all, but was merely 70% of recommended quantities. Fe intake was greatly short especially in women and vitamin C also showed same situation. In the view of food group intake, grains and potatoes were 70.06%, vegetables and fruits 13.05%, meats fishes and beans 11.99%, respectivelly. Oil and fat intake showed lowest percentage as 0.77%. 2. Nutritional experiments albino rats have been fed for 7 weeks with three different diet: all-polished rice diet, 70% polished rice diet, and the standard diet for contral group. Dietary restriction were at 4 levels: 5% , 10%, 15%, 20% in 70% polished rice det. Body weight of 70% polished rice group gained value compare to all polished rice group. In the final organ weight all-polished rice group and 70% polished rice group and 70% polished rice group revealed similar results, but organ weight almost decreased dued to dietary restriction and statistical data showed significant differences between dietary restriction group and none-restriction group. In the femur length, 70% polished rice group was longer than all polished rice group but there was no significant differences. The nitrogen content of liver and muscle of 70% polished rice group was higher than all-polished rice group. Furthermone there was significant differences in the female (P<0.1). In the 10% restriction group(female) and 15% restriction group(male), nitrogen retention was higher than 0% restriction group. The other biochemical analysis such as liver lipid, serum cholesterol, glucose of urine, feces and serum were not revealed any significant differences. As a result of studying, it seems clear that 70% polished rice intake influenced much nourshment to white rat growth than all-porished rice intake, and there is no significant influence to animal growth and metabolic effect even if it was restricted $5{\sim}10%$ of diet.

• The Korean Journal of Mycology
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• v.26 no.4 s.87
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• pp.562-573
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• 1998

The symbiotic activities of arbuscular mycorrhizal fungi (AMF) by analyzing spore density, symbiosis intensity and vertical distribution of AMF spores, phytomasses of higher plants such as Calamagrostis epigeios, Imperata cylindrica, Artemisia scoparia, Aster tripolium and Sonchus brachyotus, and physico-chemical properties of soil were determined in the rhizospheres of higher plants in abandoned two coastal reclaimed lands, which were constructed in 12 and 30 years ago, respectively. Vertical distribution of the AMF spores in the rhizospheres of higher plants was restricted within 20 cm depth from soil surface, which would be closely related with vertical distribution of root system, water table and soil aeration. Of vertical distribution of soil properties, W.C., A-P and K concentrations were increased as soil depth was lowered. In the coastal reclaimed lands, symbiotic activities of the AMF such as spore density and symbiotic intensity, were conspicuously stimulated by the increase of soil pH value, organic matter and total nitrogen concentrations, but inhibited by the increase of moisture, available phosphorus and sodium concentrations in the rhizosphere soil. Phosphorus absorption by higher plants growing in the reclaimed lands increased by the rise of symbiotic activities of AMF. Since symbiotic activities of AMF were stimulated with decreasing soil phosphorus concentrations, higher plants associated with AMF absorbed a large amount of phosphorus from the soil is low phosphorus concentrations.

• The Korean Journal of Mycology
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• v.22 no.4
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• pp.394-409
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• 1994

The symbiotic activities of arbuscular mycorrhizal fungi(AMF) such as spore density, symbiotic intensity and vesicle density, phytomasses of higher plants such as Calamagrostis epigeios, Imperata cylindria, Artemisia scoparia, Aster tripolium and Sonchus brachyotus and seasonal change of the AMF activities, electric conductivity and zinc contents in plant and soil were determined in the rhizospheres of higher plants at abandoned old coastal reclaimed lands, where constructed in 12 and 30 years ago. If plants of reclaimed land classified to salinity, symbiotic activities of AMF were high in order of obligate halophyte, facultative halophyte and glycophyte. Also, those plants classified to life form, symbiotic activities of AMF were high in order of annual, biennial and perennial plants. Seasonal variation of spore density, one of symbiotic activities showed that the plateau density maintained continuously from the end of growing season of the higher plants to next spring. For this reason, it regarded that reproduction of AMF spore would be formed in autumn, when the higher plants will be developed. Seasonal change of symbiosis intensity, other symbiotic activities, however, showed that the highest symbiosis intensity occurred in spring and summer but the lowest in autumn. In relationships among symbiotic activities, spore density was directry proportional increase of symbiosis intensity. Moreover, phytomass of higher plants also was directly proportional to increase the spore density as well as symbiosis intensity. Vesicle density, however, did not any correlation with the phytomass, spore density and symbiosis intensity. From these results, it can know that both spore density and symbiosis intensity are strongly possible to use as the measure of symbiotic activity owing to symbiosis of tho-AMF, the more absorption of zinc by the higher plants carried out the less concentration of zinc in the soil.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.12 no.4
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• pp.245-253
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• 1979

Trimethylamine and dimethylamine contents of salted, hot-air dried, sun dried and boiled-dried samples of three commercial fishes, common mackerel, gizzard-shad and sardine, were analyzed and quantitatively compared at two different temperature conditions. The formation of both secondary amines was more rapid at $25^{\circ}C$ than at $10^{\circ}C$. And the content of dimethylamine in small sardine was comparatively higher than that in the other samples at both temperatures. Residual amounts of trimethylamine oxide of Halted common mackerel, gizzard-shad and boiled-dried small sardine were relatively higher than those of the other samples. Trimethylamine contents of sun dried samples were relatively higher than in the other samples, while those of boiled-dried small sardine was comparatively lower than those of the others. Dimethylamine content of sun dried samples were higher than those of the other samples, whereas those of boiled-dried small sardine and salted common mackerel were comparatively lower than those of the other samples.

• The Journal of the Korea Contents Association
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• v.19 no.11
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• pp.132-143
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• 2019

The purposes of this study are to identify how university's entrance examination system is related to private education, and to explore how to improve the university of education entrance system in order to reduce private education costs. For these purposes, 116 teachers of senior students in high school in Daegu and Gyeongbuk and 107 pre-service teachers who had experienced the entrance of the university were surveyed in order to find out the perception of the relationship between admissions elements and private education. As a result, it is possible to concentrate more on school education by strengthening high school grades in the entrance examination. However, there was other opinion that the strengthening high school grades in the university entrance could lead to the further increase in the cost of private education. As there are big differences in the perception of the screening factors between rural areas (Gyeongsangbuk-do) and large cities (Daegu), it is necessary to introduce the entrance examination system considering the characteristics of each region. Third-year teachers in high schools argued that university admissions should reduce the rate of the College Scholastic Ability Test (CSAT) and increase the rate of interviews. The results of this study suggest that the improvement of the university entrance examination system to reduce the cost of private tutoring requires securing fairness of document evaluation, strengthening interviews, and opening interview questions.

• Applied Biological Chemistry
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• v.43 no.2
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• pp.141-147
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• 2000

Interrelation between the antioxidative activity of hot-water extracts of 130 medicinal plants and their cellular antimutagenic activity was investigated. Antioxidative activity was evaluated by assaying electron-donation to DPPH free radical and scavenging of hydroxyl radical $({\cdot}OH)$ generated through Fenton rection, respectively. All medicinal plants examined in this study exhibited markedly electron-donating ability and radical scavenging ability in each assay system. The results demonstrated the fact that Pilbal (Piper longum L.) is the strongest in electron-donating activity, on the other hand, that Seokgok (Dendrobium moniliforme L.) is the strongest in ${\cdot}OH$ scavenging activity. When evaluated their antioxidative activities, 24 medicinal plants including Jimo (Anemarrhena asphodeloides Bunge) were found to be the medicinal plants carrying strong antioxidative activity, which exhibited more than 50% activity compared to the control group in both electron-donating and free radical scavenging. The experiment was also performed to examine whether 11 medicinal plants having significant antimutagenicity damage DNA in the presence of $Cu^{2+}$, showing the fact that all samples tested, except Taeksa (Alisma canaliculatum All. Br.), Paekjain (Nitraria sibirica Pall) and Ohyak (Lindera strychifolia Sieb. et Zucc. Villar) are capable of inducing DNA strand break. We also found that Taeksa and Paekjain strongly block DNA strand break induced by chemical mutagen mitomycin C.