• 한국염색가공학회지
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• 제18권5호
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• pp.80-87
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• 2006

A new fastness formula based on the CIEDE2000 color-difference formula was developed by B. Rigg and his coworkers. It is much simpler to calculate the staining fastness grade than the ISO 105-A04 fastness formula based on the CIELAB color-difference formula. Sample pair sets, which cover a wide color space range were accumulated from the NCS(Natural Color System) color book. for those sample pair sets, a visual measurement experiment and an instrumental measurement experiment of fastness grade were carried out. Each performance of the ISO 105-A43 fastness formula and newly developed fastness formula was compared through degree of agreement for visual measurement results. The newly developed fastness formula indicated improved performance for measuring fastness grade as it was confirmed that the performance of the current ISO fastness formula ISO 105-A04 for assessing staining, was inadequate for measuring fastness grade. Then the fastness formulae were examined more closely according to the particular color spaces and the correlation of hue, lightness and chroma for measuring staining fastness grade was also considered to recommend more improved fastness formula. By modifying the weighting functions of CIEDE2000, which is a basis of new fastness formula developed by B. Rigg, a modified fastness formula is proposed in this study.

• 한국과학교육학회지
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• 제17권3호
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• pp.261-271
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• 1997

This study evaluates on students' understanding and misunderstanding of homeostasis, classification of animals and plants, and food production in plants, and analyzes the teacher factor as a possible source of students' misconception. A total number of 863 students and 47 biology teachers at the middle and high school were randomly selected. Students' conceptions and misconceptions were measured with concept evaluation statements (CES) which was translated into Korean by author. The CES was developed and validated by Simson and Marek (1988). Teacher's misconceptions were investigated the way in which teachers marked students' work. The supposed answer given to the teachers to mark was based on misconceptions held by students tested in concept evaluation statements. The results of this study are as follows : 1. 0% of 7th Grade students, 4.5% of 9th Grade students and 5.4% of 11th Grade students understood homeostasis. There was a significant difference at the level of students' understanding of homeostasis according to schools and gender(P<0.05). Many students had a tendency of understanding the conception of the homeostasis by experiences and unscientific use of everyday language rather than a scientific concept. 2. 0.4% of 7th Grade students, 3.1% of 9th Grade students and 2.9% of 11th Grade students understood classification of animals and plants. There was a significant difference at the level of students' understanding of classification of animals and plants according to schools and gender(P<0.05). Students classified animals and plants through personal experiences and observations instead of trying to classify through microscopic analysis of animals and plants cell. 3. 1.2% of 7th Grade students, 10.3% of 9th Grade students and 19.4% of 11th Grade students understood food production in plants. There was a significant difference at the level of students' understanding of food production in plants according to schools and gender(P<0.05). Students had a misconception that food production in plants was done by an absorption of nutrients from soil not by photosynthesis. 4. A large proportion of teachers surveyed in this study appear to have misconceptions about homeostasis (38.1%), classification of animals and plants (34.1%), food production in plants (40.4%). The male teachers had. more misconceptions than female teachers(P<0.05). However, they didn't show any significant differences according to schools and teaching experience(P<0.05). 5. According to the investigation of teachers' perception, 29.8% of the teachers acknowledged that they might be a cause for students' misconceptions. This study shows that 38.3% of teachers did not understand the analyzed biological concepts precisely. By comparing the data of students and teachers, it turned out that teachers participate in the students' misconceptions. And teachers themselves acknowledged that students' misconceptions could be caused by them. Therefore. teachers' right understanding of fundamental biological concepts should precede to students' biology education. New training programs for biology teachers seem to be urgent.

• 대한물리의학회지
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• 제8권3호
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• pp.317-326
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• 2013

PURPOSE: The purpose of this research is to check the attitudes and behavior toward the disabilities of occupational therapy students who are going to be the future subjects of medical rehabilitation service, based on this to provide occupational therapy students an alternative to have the right attitude toward the disabilities to find ways to reduce prejudice against them in society meeting in the future. METHODS: The survey was carried out to select randomly 6 cities and provinces nationwide with occupational therapy, to choose 20 students at each grade and have them to fill up the questionnaire themselves after reading the text, and as a result of the survey. RESULTS: The attitudes and behavior toward the disabilities according to the gender, there was more positive significant difference in women than men, the attitudes and behavior toward the disabilities by each grade, the higher grade they were, the more positive significant difference they had. As the results of the attitudes and behavior toward the disabilities whether to take classes related to them, there was a positive significant difference in the students who took classes related to disabilities person, and the results of the attitudes and behavior toward the disabilities whether to participate in a clinical practice and voluntary service, there was a positive significant difference in the students who took part in that service. CONCLUSION: The positive attitudes and behavior toward disabilities were higher in women than men, higher grade students than the lower, the more time for voluntary service and the more contact with disabilities persons. As through the results of this, the comprehensive and continuous education about the disabilities for the students in all Departments related to medical rehabilitation service and the suggestion for continuous research on the fundamental problems should be made in the future.

• 한국문헌정보학회지
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• 제8권
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• pp.157-182
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• 1981

The purpose of present study is to investigate children's attitude toward reading, reading method, reading environment, reading volume, and then to compare the results obtained by sex, area and grade. The tool used in this survey was a questionaire designed specially by the investigator. The questionaire was distributed to 1339 children selected at the descretion of the investigator with due consideration of sex, area(large city, medium city and rural community) and grade (from 2nd grade of primary school to 2nd year of middle school). The results of this study are summerized as follows : 1) Regional difference was observed in respect of the followiug : Awareness on reading, motivation for reading, reading method, activity after reading, number of books collected, reading guidance, how to obtain books to read, monthly reading volume, and reading tendency. 2) Also difference by grade was observed in respcet of the following ; Activity after reading, reading guidance, monthly reading volume and reading tendency. The following conclusions have been made based on the results of the survey: 1) The children's attitude toward reading and reading method may be considered favorable while reading environment is not satisfactory yet. Especially, reading environment of school children in medium cities and rural communities is worse than that of large cities. 2) No difference by sex was observed in respect of attitudes toward reading, reading method, reading environment and reading volume while difference by sex was observed in respect of reading tendency. The followings are recommended based on the results of survey: 1) To establish and carry out a comprehensive program for the improvement of reading environment of the school children in medium cities and rural communities. 2) To improve and substantiate school library facilities and design a proper guidance program to have children utilize school library to the maximum extent. 3) To contemplate on the consolidated measures for reading behavior survey.

• 한국수학교육학회지시리즈D:수학교육연구
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• 제13권2호
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• pp.171-180
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• 2009

This study investigates relationships between 7th and 8th grade students' achievements in forming and solving equations of. Study was conducted on randomly selected 7th and 8th grade students of elementary schools in Konya City, Turkey. 145 students (99 female, 46 male) participated in the research. Data were collected by an 'Equation Test'. The test which is suitable for equation types in 7th Grade Elementary Mathematics Curriculum. It was developed by the researchers. The relationships between achievements in forming and solving equations were examined by dependent samples t-test. The t-test results show that there is a significant difference. This difference is in the favor of equation solving (p>0.05). In other word, students are more successful in equation solving. In addition, students' achievements about different types of equations were investigated. The results show that the students have the highest achievement in ax=b type and the lowest achievement in (ax+b)/c=(dx+e)/f type of equations.

• 아동학회지
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• 제26권2호
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• pp.225-242
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• 2005

This study investigated the relations between children's self-perceived competence and friendship quality by grade, sex and father/mother attachment, and the relative importance of father/mother attachment and self-perceived competence on quality of children's friendships. There was a mean difference in self-perceived competence by grade and father/mother attachment. While both 3rd graders and 5th graders showed high levels of father/mother attachment and self-perceived competence, 5th graders showed higher self-perceived competence than 3rd graders. There was a mean difference in friendship quality by grade, sex and father/mother attachment : 5th graders showed higher friendship quality than the 3rd graders, and girls showed higher friendship quality then boys. In conclusion, children's friendship quality was influenced by father/mother attachment and social acceptance.

• 수산해양교육연구
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• 제17권2호
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• pp.240-251
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• 2005

The purpose of this study was to examine the relationship between critical thinking and academic achievement. Subjects were 396 junior and 371 senior high school students in Busan. The instruments used in this study were Cornell Critical Thinking Test and Academic Achievement Test. The results were as follows : First, there was a sinificant grade level difference in critical thinking. Second, there was a signficant sex difference in critical thinking and there was a significant interaction effect by grade level and sex. Third, critical thinking was significantly related to the students' academic achievement. The implications were discussed and recommendations for future research were made.

• 대한가정학회지
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• 제39권1호
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• pp.53-64
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• 2001

This study investigated early school adjustment of institutionalized and home-reared children. Subjects were 118 institutionalized (56 first and 62 second grade children; 66 boys and 52 girls) and 125 home-reared children (69 first and 56 second grade children; 65 boys and 60 girls) in Seoul. Data were analyzed with t-test and two-way ANOVA. Measures of school adjustment included relationships with leachers, relationships with peers, attitudes on school atmosphere, and observance of school regulation. Results showed that institutionalized children had lower scores than home-reared children in school adjustment, especially relationships with peer and observance of school regulation. For institutionalized children, there was a significant difference in attitudes on school atmosphere depending on grade. For home-reared children, there was a significant difference in school adjustment depending on sex.

• Journal of Trauma and Injury
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• 제30권4호
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• pp.192-196
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• 2017

Purpose: Blunt injury accounts for 80-95% of renal injury trauma in the United States. The majority of blunt renal injuries are low grade and 80-85% of these injuries can be managed conservatively. However, there is a debate on the management of patients with high-grade renal injury. We reviewed our experience of renal trauma at our trauma center to assess management strategy for high-grade blunt renal injury. Methods: We reviewed blunt renal injury cases admitted at a single trauma center between August 2007 and December 2015. Computed tomography (CT) scan was used to diagnose renal injuries and high-grade (according to the American Association for the Surgery of Trauma [AAST] organ injury scale III-V) renal injury patients were included in the analysis. Results: During the eight-year study period, there were 62 AAST grade III-V patients. 5 cases underwent nephrectomy and 57 underwent non-operative management (NOM). There was no difference in outcome between the operative group and the NOM group. In the NOM group, 24 cases underwent angioembolization with a 91% success rate. The Incidence of urological complications correlated with increasing grade. Conclusions: Conservative management of high-grade blunt renal injury was considered preferable to operative management, with an increased renal salvage rate. However, high-grade injuries have higher complication rates, and therefore, close observation is recommended after conservative management.

• 한국초등과학교육학회지:초등과학교육
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• 제38권3호
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• pp.360-374
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• 2019

The purpose of this study is to investigate the self-perceptions of the elementary school students' on the affective, behavioral and cognitive domains in science class. To see if there are differences in students' perceptions according to grade levels, a self-perception questionnaire was applied to third and fifth grade students in Seoul, Korea. The major results of the study are as follows. First, the perception level of the affective domain was higher than that of the cognitive domain in third grade students. There was no significant difference in the self-perception level of the fifth grade students. Both third and fifth grade students perceived the greatest improvement in the cognitive domain through one year of science teaching. Second, in the life science class, the same tendency was also observed. The students in the third and fifth grade reported that cognitive domains were the most improved through the one-year life science class. Third, when the students' perceptions were compared by grades, the third grade students showed higher self-perception scores than fifth grade students. As the grade increased, the perception scores of the students' lowered. Based on these findings, implications for science education research and teaching and learning at school are discussed.