• Journal of Korean Society of Forest Science
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• v.101 no.4
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• pp.703-709
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• 2012

We studied the community fluctuations of benthic macroinvertebrates of forest fired area in Samcheok-si from 2001 to 2009. Total collected macroinvertebrates species were 18 belonging to 14 families, 8 orders, 3 classes, and 2 phyla in 2001, and 70 belonging to 40 families, 15 orders, 7 classes and 5 phyla in 2009 (9 years after the forest fire). During the first four years after the forest fire, dipteran insects were dominant, but after then, ephemeropteran insects have increased in abundance and richness. As time elapsed from the fire, dominance indices were decreasing, while species diversity, richness and species evenness indices were increasing.

• Korean Journal of Poultry Science
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• v.22 no.1
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• pp.31-42
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• 1995

This study was to investigate the effects of dietary linoleic acid(18:2\omega6, LA) and aipha-linolenic acid(18:3\omega3. \alpha-LNA) levels on brain development and fatty acid compositions of various lipid classes in the chicken embryo brain tissues. Thirty two ISA Brown layers, 52 weeks-old, were divided into four groups. Birds of each group were given corn-soybean meal based diets added with 1) safflower oil 8%, 2) safflower oil 6% + perilla oil 2%, 3) safflower oil 2% + perilla oil 6%, or 4) perilla oil 8%. Mter 15 days fed the diets. the layers were artificially inseminated to obtain fertile eggs. During the incubation. embryonic brains were sampled at 15th and 21st days. Fatty acid contents were quantitated by using heptadecanoic acid (17:0) as an internal standard. No significant differences in brain weight and in contents of various lipids such as phospholipid. triglyceride, cholesterol. cholesterol ester and free fatty acid in the tissues were found among the dietary groups (P<0.05). The ratios of AA/LA in the brain lipid classes were lowered as the dietary levels of perilla oil were increased. Higher LA was found in phosphatidylcholine(PC) than arachidonic acid (20:4\omega6. AA), meanwhile the level of LA was less than AA in phosphatidylethanolamine(PE). Docosahexaenoic acid(22:6\omega3, DHA) was the* major fatty acid in the tissue and its content in PE was 2.5~3 times higher than in PC. DHA level in the phospholipid reached at a peak (1.7~1.8 mg/brain) in dietary groups added with 6% or 8% perilla oil. suggesting that no more increase in that fatty acid level in the brain tissue could be obtained by consuming more \alpha-LNA, the major precursor of DHA.

• Journal of The Korean Association For Science Education
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• v.17 no.4
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• pp.395-403
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• 1997

In order to study the effect of the 'General Science' course implemented under the 6th science curriculum, high school students' views about the relationship between science/technology and society and their perceptions of science classroom environment were investigated. Four classes (n = 211) were selected from those completed the 'Science I' course under the 5th science curriculum, and 4 another classes (n = 216) which took the 'General Science' course under the 6th science curriculum were selected. In order to compare students' views about the relationship between science /technology and society. 10 items were selected from the VOSTS (Views On Science-Technology-Society) while considering the 6th science curriculum and the 'General Science' textbooks, and administered at the end of the 'Science I' course and at the beginning and end of the 'General Science' course. In order to compare the perceptions of science classroom environment, the Perceptions of Science Classroom Environment Questionnaire, which was prepared from the Individualized Classroom Environment Questionnaire. the Science Laboratory Environment Inventory, and the Classroom Environment Scale. was also administered at the end of the 'Science I' course and the 'General Science' course. The results indicated that the mean VOSTS score of the 6th-curriculum group was lower than that of the 5th-curriculum group, although the difference was not statistically significant. The decrease in the VOSTS score of the 6th-curriculum group during the 'General Science' course was statistically significant. It was also found that unrealistic views such as 'technology is the application of science', and 'corporations should control science/technology' had been formed during the course. However, the 6th-curriculum group had more positive perceptions of science classroom environment. Educational implications are discussed.

• Journal of The Korean Association For Science Education
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• v.23 no.1
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• pp.57-65
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• 2003

In this study, the effects of grouping by extraversion and introversion in paired think-aloud problem solving using a four-stage problem-solving strategy emphasizing planning and checking stages were investigated. Prior to the instructions, the students' extraversion/introversion in three high school classes (N=87) were examined, and those classes were randomly assigned to the homogeneous, the heterogeneous, and the control groups. The test scores of the two treatment groups were significantly higher than those of the control group in the problem-solving ability. However, there were no significant differences in learning difficulty and self-efficacy. Although there were no significant differences between the scores of two treatment groups in the subcategories of the perception of treatment, the test scores of extroverts were significantly higher than those of introverts in the perception of performing listener's role, the preference to problem solving strategy, and the preference to paired think-aloud problem solving.

• Journal of The Korean Association For Science Education
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• v.35 no.2
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• pp.179-197
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• 2015

Based on the importance of spatial thinking to understand celestial motion, this study aimed to investigate how spatial thinking was treated in astronomy classes. For this study, we analyzed four elementary teachers' science classes about the unit 'solar systems and stars' in 5th grade in terms of spatial thinking. The results showed that sharing perspectives and orientation explicitly between a teacher and students were important for students to understand celestial motion. Providing the earth-based and the space-based viewpoints simultaneously were helpful for students' understanding of celestial motion. Based on these results, this study suggested that clarifying the viewpoint and orientation, showing the earth-based and the space-based viewpoint simultaneously, and reorganizing the relative units of astronomy based on celestial motion and spatial thinking.

• Journal of muscle and joint health
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• v.18 no.2
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• pp.169-181
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• 2011

Purpose: This paper presents the development process and the final contents of the sellf- management education program integrated with exercise training (Healthy Aging Happy Aging, HAHA program) for community residing older adults with chronic diseases. Methods: The program evaluation methodology was applied which is an interactive program development process based on needs assessment, formative evaluation, process evaluation and outcome evaluation. The program was developed and revised while the program was implementing to 22 hypertension (HT) and 32 diabetic (DM) participants. Results: The final program has two sub-programs for HT and DM participants utilizing self-efficacy resources. They share four common components; 1) health screening of exercise risks, 2) weekly 1-hour group self-management education classes, 3) biweekly 1-hour group exercise training and 4) a mid-term individual counseling. Both sub-programs were 12-weeks long but have different education and exercise contents. Participants-rated mean satisfaction scores were 3.47/4 and 3.61/4 for HT and DM program respectively. Attendance rate were 83.1% ~ 92.3% for the classes. Conclusion: The HAHA program developed by multidisciplinary team which reflected participants needs was accepted well by participants evidenced by high attendance rate and perceived satisfaction level.

• Journal of Korean Society for Geospatial Information Science
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• v.1 no.1 s.1
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• pp.181-192
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• 1993

Image is composed of the digital numbers including information on natural phenomena, their condition and the kind of objects. Digital numbers change in geometric correction(that is preprocessing). This change of digital numbers gave an effect on results of land-cover classification. We intend to know the influence of resampling as classifying land-cover using the image reconstructed by geometric correction in this paper. Chun-cheon basin was selected the study area having most variable land-cover pattern in North-Han river valley and made on use of RESTEC data resampled in preprocessing. Land-cover is classified as six classes of LEVEL I using maximum likelyhood classification method. We classified land-cover using the image resampled by two methods in this study. Bilinear interpolation method was most accurate in five classes except bear-land in the result of comparing each class with topographic map. We should choose the method of resampling according to the class in which we put the importance in the image resampling of geometric correction. And if we use four-season's image, we may classify more accurately in case of the confusion in case of the confusion in borders of rice field and farm.

• The Journal of Korean Association of Computer Education
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• v.12 no.5
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• pp.75-85
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• 2009

This study compared the differences between a group that studied with AR contents and a group that studied in a traditional method to examine the effects of AR contents use in elementary school science classes. The effects in four areas of studying were examined : study focus rate, study activities consuming variables, study participation activeness and instructional climate. As a result, there was no significant difference in study concentration rate between the AR and traditional groups. For study participation activeness, the AR group had higher participation actions, but there was no difference between the groups for language participation. For study activities consuming variables, the AR group stimulated more diverse study activities than the traditional group. For instruction climate, the AR contents group contributed more to creating a positive climate compared to the traditional group. Therefore, the results showed that application of AR contents on science classes would stimulate active participation of students and various study activities and help create a positive instructional climate.

• Journal of Digital Convergence
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• v.14 no.12
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• pp.607-614
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• 2016

This study investigated the effect of fitness management class on body composition, blood pressure and health-related fitness in college women. The subjects were to target college women of the 317 people to take nine semesters 2012-2016 school fitness management class, group division were divided underweight, thin-obesity, normal, normal-obesity and obesity by body mass index(BMI) and body fat(%). Fitness management classes consist of combined exercise(resistance and aerobic exercise) was conducted to exercise twice a week 75 minutes a day. Four groups except for the obese group, Fitness management class have a positive improvement effect on body weight, BMI, BF(%), muscle mass and waist circumference. In addition, five groups were positive improvement on blood pressure and health-related fitness variables. In conclusions, except for improving body composition in obese college women, fitness management classes had a positive improvement effect on body composition, blood pressure and health-related fitness in college women.

• Journal of Forest and Environmental Science
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• v.10 no.1
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• pp.1-7
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• 1994

A survey of the natural regeneration of the gallery forest at the Sao Bartolomeu river, Federal District - Brazil it was carry out. Plots of $100m^2$ let established the composition of the trees succession of one hectare. 4262 plants distributed in four classes according to the height were found. The phytosociological value of the classes was respectively 3,3 2,4 2,0 2,3 and through of them it was possible to identify the phytosociological position of the species. The results of the calculations of the relative index of the natural regeneration and value of importance shows that the most important species are Cheiloclinium cognatum A.C. Smith, Piptadenia communis Benth., Faramea cyanea M. Arg., Xylopia sericea St. Hil., Copeifera lansdorfii Desf., Cupania vernalis Camb., Matayba guianensis Aublet, Virola sebifera Aublet, Ocotea densiflora Meissn and Didimopanax morototoni (Aublet) Dcne et Pl.