• Journal of The Korean Association For Science Education
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• v.30 no.5
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• pp.621-635
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• 2010

Problem-based Learning (PBL) has been known as an effective strategy for dealing with various aspects of education such as the enhancement of students' motivation, interest in subjects, academic achievement, and cooperative abilities. However, PBL has not been widely implemented in secondary schools. The purpose of this study is to investigate secondary school teachers' perception of problem-based learning and their way of applying it. Data was collected through semi-structured interviews with nine secondary school teachers. Five of them had experience in implementing PBL, while four of them had interest in using PBL but had not yet had the experience. Different concepts were extracted and categorized. Nvivo 2.0 was used for analysis. The results were as follows: Changes in student attitude toward class, improvement on cooperation with others, self-regulated learning skills, and satisfaction from students' positive comments on PBL enabled teachers to become more enthusiastic and positive toward PBL. The stress of developing proper problems and the enormous amounts of time and efforts required in using PBL were shown as barriers for teachers in implementing PBL. However, some negative perspectives about PBL changed into positive after teachers experience PBL. By examining each teacher's way of implementing PBL, several teaching strategies suitable to their school systems were suggested.

• Journal of the Korean earth science society
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• v.26 no.6
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• pp.489-500
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• 2005

The objective of this study is to examine the cognitive process that undergoes a middle student’s conceptual change about the universe by the cognitive conflict, using science history materials as a teaching strategy. Four eighth graders were selected and classified by three cognitive level. Students were interviewed and conducted to an inquiry activities regarding their viewpoint about the universe after each class, and their conceptual change patterns were analysed from pre-test and post-test. This study showed that each student held dissimilar astronomical preconceptions and various misconceptions about celestial motion. Students at the formal operational stage and transitional stage experienced the conceptual change from geocentricism to heliocentricism by instructional model upon the science history materials. Student at the concrete operational stage had either unscientific conception, no conception, or could not have a conceptual change even when being presented with an environment that arouses cognitive conflict ($R^2$: Phase change of Venus and its Rise and set time). They ended up having a cognitive change from geocentricism to heliocentricism by solving another problem ($R^2$: Relation between visible diameter and position of Mars). After the instruction, a conceptual achievement progress was reported with a $10\%$ improvement. Therefore, the instruction model based upon science history was effective on student’s scientific conceptual change.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.12 no.6
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• pp.681-689
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• 2019

Web usage pattern discovery is an advanced means by using web log data, and it's also a specific application of data mining technology in Web log data mining. In education Data Mining (DM) is the application of Data Mining techniques to educational data (such as Web logs of University, e-learning, adaptive hypermedia and intelligent tutoring systems, etc.), and so, its objective is to analyze these types of data in order to resolve educational research issues. In this paper, the Web log data of a university are used as the research object of data mining. With using the database OLAP technology the Web log data are preprocessed into the data format that can be used for data mining, and the processing results are stored into the MSSQL. At the same time the basic data statistics and analysis are completed based on the processed Web log records. In addition, we introduced the Apriori Algorithm of Web usage pattern mining and its implementation process, developed the Apriori Algorithm program in Python development environment, then gave the performance of the Apriori Algorithm and realized the mining of Web user access pattern. The results have important theoretical significance for the application of the patterns in the development of teaching systems. The next research is to explore the improvement of the Apriori Algorithm in the distributed computing environment.

• Journal of Distribution Science
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• v.13 no.4
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• pp.77-87
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• 2015

Purpose - This study aims to investigate the current state of distribution terminology usage by retailers and consumers nationwide, and to suggest a practical improvement plan for its standardization. The Korean distribution industry is closely related to consumers' daily lives. However, in reality, there exists a gap among producers, distributors, and consumers in terms of the definition, understanding, and perception of the terminology. Therefore, standardizing this terminology is essential for more smooth communication. This paper suggests the necessity of committing overall research and survey activities to the actual conditions of using Korean distribution terminology by organizations and their respective management situations, and further, the necessity of probing the problem and its measures in line with the objective and mission of the "Fundamental Law of the Korean Language." Research design, data, and methodology - This study's scope is limited to wholesale and retail including some information systems. First, the study covers most written material including lexicons and glossary of distribution terminology, university textbooks and teaching material for national certificate of qualification, and related laws and ordinances. Second, the survey covers retailers' management situations by store format. The retailers used as the sample for the survey include department stores, discount stores, SSM, and convenience stores. Altogether, 20 specialists were interviewed in their respective sectors or retail formats. Finally, the project team surveyed a sample of 1,300 consumers nationwide on 50 distribution terms mainly used by consumers, including those about awareness, understanding, usage, and attitude. Results - In total, 1,249 terms are drawn through literature research including distribution terminology used in the related literature, glossary and lexicons, distribution terminology in textbooks, and legal terminology. A classified table comprises four large categories including general distribution, distribution marketing, distribution information, and merchandise. The results of the three-step research including literature survey, field survey of retailers, and consumer survey were advised to be screened by academia (retail associations, faculty etc.), retailers (major retail management by store format), retail specialists and consultants, consumers, and Korean linguists. In total, 1,300 questionnaires for 50 terms of the distribution terminology closely associated with consumers were distributed to subjects nationwide. Conclusions - The desired and expected results from this study are summarized from three perspectives as follows: First, from retailers' perspective, a new concept, or coinage of new terms of the distribution industry stems from advanced countries such as America and Europe. However, the original meaning and definition are diluted and distorted with changes in the language users' situations and context. This study provides basic guidelines for standardization of distribution terms used among various retail formats in most daily life situations that consumers encounter. Second, from the nation's perspective, this study suggests optimal choices of distribution terminology in the context of laws and ordinances regarding concerned Ministries. Last, from the consumers' perspective, this paper enables consumers to understand and use distribution terms properly in their daily life.

• The Journal of the Korea Contents Association
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• v.16 no.4
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• pp.179-194
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• 2016

The purpose of this study is to find out how the reconstructed textbook for vocational high school students influences on students' scholastic achievement and affective domain when it is used in the class of vocational high school. To tackle the study problems, the researcher chose two classes of the first grade in G commercial high school and gave lessons to each of the two classes; one class, as an experimental group, was taught with the reconstructed textbook and the other, as a comparative group, was taught with the original textbook. The following results are derived from the study. First, it turned out in the post academic achievement test result, there is no significant difference between the experimental group and the comparison group, by significant level; .05. However, the prior academic achievement test result shows that the average of the comparison group is 0.44 points higher than the average of the experimental group, while the post test result shows that the average of the experimental group is 1.96 points higher than the average of the comparison group. Second, it turned out by the post affective domain test result, there is no significant difference between the experimental group and the comparison group, by significant level; .05, and any significant difference did not occur in all five areas. However, the whole point of the affective domain and the points of each area of experimental group are higher than those of the comparison group, and the degree of improvement in experimental group is also greater than that of the comparison group. In conclusion, the effectiveness of utilizing a reconstructed textbook in vocational high school math class can be expected in the long term.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.43 no.4
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• pp.247-255
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• 2017

Objectives: The aim of this study was to compare the quality of life (QoL) of parents/caregivers of children with cleft lip and/or palate before and after surgical repair of an orofacial cleft. Materials and Methods: Families of subjects who required either primary or secondary orofacial cleft repair who satisfied the inclusion criteria were recruited. A preoperative and postoperative health-related QoL questionnaire, the 'Impact on Family Scale' (IOFS), was applied in order to detect the subjectively perceived QoL in the affected family before and after surgical intervention. The mean pre- and postoperative total scores were compared using paired t-test. Pre- and postoperative mean scores were also compared across the 5 domains of the IOFS. Results: The proportion of families whose QoL was affected before surgery was 95.7%. The domains with the greatest impact preoperatively were the financial domain and social domains. Families having children with bilateral cleft lip showed QoL effects mostly in the social domain and 'impact on sibling' domain. Postoperatively, the mean total QoL score was significantly lower than the mean preoperative QoL score, indicating significant improvement in QoL (P<0.001). The mean postoperative QoL score was also significantly lower than the mean preoperative QoL score in all domains. Only 3.2% of the families reported affectation of their QoL after surgery. The domains of mastery (61.3%) with a mean of $7.4{\pm}1.8$ and finance (45.1%) with a mean score of $7.2{\pm}1.6$ were those showing the greatest postoperative impact. The proportion of families whose QoL was affected by orofacial cleft was markedly different after treatment (95.7% preoperative and 3.2% postoperative). Conclusion: Caring for children with orofacial clefts significantly reduces the QoL of parents/caregivers in all domains. However, surgical intervention significantly improves the QoL of the parents/caregivers of these children.

• Journal of Veterinary Clinics
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• v.27 no.1
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• pp.102-106
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• 2010

A 5-year-old castrated male Cocker Spaniel was referred to Veterinary Medical Teaching Hospital of Seoul National University with a history of chronic conjunctival hyperemia and a fleshy corneal mass in the right eye. On ophthalmic examinations, it was observed that a well-vascularized fleshy mass at the dorsolateral limbus extended into the clear cornea. The lesion regressed by initial medications, including both topical and systemic corticosteroids, and topical cyclosporine A. However, the lesion relapsed and grossly infiltrated to cornea in a short period of time without improvement in spite of the immunosuppressive therapy, leading to the vision loss. The eye was enucleated and nodular granulomatous episclerokeratitis was confirmed on histopathological examination.

• Journal of The Korean Association of Information Education
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• v.22 no.5
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• pp.519-533
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• 2018

This study aims to classify the types of instructional expertise development activities of teachers who teach subjects related to software education in primary schools. To this end, the study analyzes their participation in expertise development activities over the recent three years, outcomes from these activities, and forms and characteristics of expertise development activities. In the questionnaire survey conducted for this study, 276 primary school teachers participated. According to the survey, the same largest proportion of them participated in collective job training (96%) and distant job training (96%), followed by consulting, instruction supervision, mentoring, and peer observation (82%), lectures, workshops, and seminars held by related government ministries and the provincial and municipal offices of education (69%), and teachers' study communities (66%). Among informal activities, reading accounted for the highest portion of the activities (88%), followed by the use of information on Websites including YouTude and GitHub (80%), and teachers' expertise development networks (76%). The reasons for their participation in the activities were mostly to improve their instructional expertise (80%). Their participation in the activities had an impact on usefulness to enhance instructional expertise, improvement of job competencies, application to current jobs, sense of instructional efficacy, and positive effect. These results of the study are expected to provide a foundation for preparing continued expertise development plans that can promote the educational value of primary school teachers' instructional expertise development activities for teaching subjects related to software education.

• The Journal of Korean Society for School & Community Health Education
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• v.12 no.2
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• pp.13-27
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• 2011

Objectives: This study aims to analyze recognition and problems of in Daegu local college students on sexual violence and figure out major factors to prevent sexual violence and to use as necessary basic resources for the improvement of individual and social recognition and effective sexual education. Methods: The Data from 255 students (85%) out of 300 excluding questionnaires with insufficient answers were under analysis using Excel Program and SPSS Win 17.0 for cross-tabulations and correlation analysis. Significance test were performed using $x^2$-test. Results: 1) As to recognition of sexual violence by gender, 88.2%(60) of male and 91.4%(171) of female students conceived the current sexual violence level is hazardous which shows female students had slightly higher recognition. 2) As to recognition of sexual education by gender, both conceived it for equipping proper value system of sex(55.9% of male & 61.5% of female student). 3) As to prevention and coping with sexual violence by gender, 58.8% of male students and 65.2% of female students answered that prevention is possible. 4) As to the correlation between sexual violence factors, it showed positive (+) correlation in the experience of sexual education and the recognition of sexual violence level, in the recognition of sexual violence level and the recognition of sexual violence responsible scope, and in the possibility of sexual violence prevention and the recognition of sexual crime prevention law. 5) As to the recognition and measurement by experience of sexual education, among those who answered the current sexual violence level was hazardous 91.8% had previous sexual education experience and 83.3% had no experience. 6) As to the recognition and measurement of sexual violence by experience of sexual violence (self-determination), those with sexual education experience (79.8%) had little experience in sexual violence than those with not (91.6%). 7) As to the recognition and measurement of sexual violence by the possibility of preventing sexual violence, it showed statistically significant difference in the reason of increase of sexual violence(p<0.01). Conclusions: Accordingly, to provide systematic and sustainable sexual education, individualized education considering gender, individual development rather than standardized group education in its teaching method is necessary, and follow-up evaluation and feed-back system should be implemented to assess achievement and recognition of sexual education.

• Journal of the International Relations & Interdisciplinary Education
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• v.1 no.1
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• pp.46-60
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• 2021

The main purpose of this study was to examine the satisfaction of online classes of undergraduates who have experienced sudden online classes in college because of COVID-19, and to analyze the differences of the satisfaction of online classes depending on colleges. The participants were 1,380 college students. Descriptive statistics, one-way ANOVA, and Post-hoc Scheffé were performed. Undergraduates were highly satisfied with online classes in cultural subjects and major subjects, whereas they showed low satisfaction with appropriateness of the assignment. There were statistically significant differences in online class satisfaction between colleges. Students at the College of Education were highly satisfied with online classes satisfaction, while engineering students were less satisfied with online classes satisfaction. There were statistically significant differences in students engagements between colleges. Regardless of colleges, students displayed low satisfaction in e-class server and teaching and learning infrastructure. These findings suggest that we need to provide autonomous support and make an effective online learning environment such as server expansion and e-class improvement to enhance undergraduates' self-directed learning. We also should come up with effective online classes guidelines.