• KSII Transactions on Internet and Information Systems (TIIS)
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• v.5 no.1
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• pp.211-227
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• 2011

Content Based Image Retrieval (CBIR) is an approach for retrieving similar images from an image database based on automatically-derived image features. The quality of a retrieval system depends on the features used to describe image content. In this paper, we propose an image clustering system that takes a database of images as input and clusters them using k-means clustering algorithm taking into consideration color, texture and shape features. Experimental results show that the combination of the three features brings about higher values of accuracy and precision.

• International Journal of Contents
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• v.17 no.2
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• pp.9-19
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• 2021

The purpose of this survey-based study was to investigate high school students' perceptions of mathematics teachers' implementation of Universal Design for Learning (UDL)-based practices and technology in their mathematics classes in 2017. A total of 303 high school students in South Korea participated in this online survey on teachers' use of technology for instructional practices, the frequency of technology tool use, and the meeting of UDL guidelines in mathematics instruction. According to frequency analysis, high school students generally perceived their teachers' mathematics teaching as somewhat positive in providing multiple means of representation, action and expression, and engagement. However, mathematics teachers' implementation of technology tools in their mathematics classes was generally limited. This study indicated significant and positive relationships between variables regarding the use of technology tools and teachers' efforts to follow the UDL guidelines. Applying the Chi-squared test, we further examined how each survey result differed according to high school students' academic achievements and grade levels.

• Clinical and Experimental Pediatrics
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• v.54 no.3
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• pp.128-132
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• 2011

Purpose: Cisplatin-based chemotherapy has been commonly used for the treatment of intracranial germ cell tumors (IC-GCTs). However, this treatment exhibits some adverse effects such as renal problems and hearing difficulty. Carboplatin-based chemotherapy was administered to pediatric patients with IC-GCTs from August 2004 at the Samsung Medical Center. In this study, we assessed the responses and adverse effects of carboplatin-based chemotherapy in pediatric IC-GCTs patients according to the risk group, and compared the results with those of the previous cisplatin-based chemotherapy. Methods: We examined 35 patients (27 men and 8 women) diagnosed with IC-GCTs between August 2004 and April 2008 and received risk-adapted carboplatin-based chemotherapy at the Samsung Medical Center. Patients were divided into either low-risk (LR) or high-risk (HR) groups and a retrospective analysis was performed using information from the medical records. Results: Although hematological complications were common, hearing difficulties or grade 3 or 4 creatinine level elevation were not observed in patients who underwent carboplatin-based chemotherapy. The frequency of febrile neutropenia did not differ between the risk groups. The overall survival was 100% and event-free survival (EFS) was 95.7%. The EFS rate was 100% in the LR group and 90% in the HR group, respectively. Conclusion: Despite their common occurrence in high-risk patients, no lethal hematological complications were associated with carboplatin-based treatment. The current carboplatin-based chemotherapy protocol is safe and effective for the treatment of pediatric patients with IC-GCTs.

• The Journal of Korean Academy of Sensory Integration
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• v.20 no.2
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• pp.46-55
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• 2022

Objective : This study aimed to explore the meaning of work experience of school-based occupatioanl therapists. Methods : This study was a phenomenological study. The participants were 7 school-based occupational therapists, all of whom were female with working experience of 5 years. One-on-One interviews were conducted with them about their work experience as school-based occupational therapists, and additional interview details were confirmed by e-mail. The interviews were recorded with the consent of the subjects. The researcher listened to the recordings several times prior to transcribing and analyzed the interviews according to Colaizzi's research method. Results : A total of 2 themes and 10 sub-themes were derived. Challenges and hopes were drawn as themes. The challenges theme included sub-themes administrative work burden, restriction of physical environment, lack of awareness of teachers, unstable employment, and legal restrictions. There were sub-themes such as sense of mission for children, team members with the same goal, children who want school-based occupational therapy, teacher' satisfaction, and responsibility for the development of school-based occupational therapy. Conclusion : Institutional improvement and policy support for school-based occupational therapy should be prepared to provide qualitatively improved school-based occupational therapy for special education subjects.

• The Mathematical Education
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• v.59 no.4
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• pp.295-312
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• 2020

This study aimed to investigate and compare perceptions of middle and high school mathematics teachers on assessment. For the purpose, we developed and used a survey consisting of two parts(importance/performance on assessment and general opinion on process-based assessment). We gathered data from 188 middle school and 125 high school mathematics teachers in Incheon area. An Importance-Performance Analysis(IPA) method was used for data analysis. As results, middle school mathematics teachers showed higher perception on both importance and performance in almost all area on assessment than high school teachers. In addition, research results based on teaching experience indicated that mathematics teachers having more teaching experience seemed to perceive high importance-high performance and low importance-low performance tasks more than mathematics teachers having less experience. In particular, middle school teachers recognized many low importance-high performance tasks according to their teaching experience. The IPA gave us different results depending on the school size. The larger the school, the more diverse opinions appeared tasks in low importance-high performance. From the general opinion on process-based assessment, the middle school mathematics teachers also seemed to have more positive perspectives and to be more active in assessment than high school mathematics teachers. Finally, we discuss implications for future policy formulation and implementation on process-based assessment.

• Journal of Korean Academy of Nursing
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• v.35 no.3
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• pp.611-620
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• 2005

Purpose: The purpose of this study was to identify the effects of a school-based obesity control program based on behavior modification and self-efficacy for obese elementary school children. The program was composed of strategies to modify diet and exercise habits and to increase self-efficacy. Method: The subjects were 57 obese children (experimental group = 28, control group = 29) whose Rohler index was 150 and over. The program was implemented once a week for 12 weeks from September 16 to December 12, 2003. The data was analyzed by Fisher's exact probability, $x^2$-test, t-test, and Wilcoxon Rank Sum test. Result: The Rohler index, fat mass and lean body mass of the experimental group positively changed after the intervention more than those of the control group, but there was a significant difference in the Rohler index only (t=2.06, p=.045). In addition, obesity stress significantly decreased (z=-2.86, p=.047) and dietary self-efficacy significantly increased (t=2.35, p=.023) in the experimental group than those of the control group. Conclusion: This study supports that a school-based obesity control program based on behavior modification and self-efficacy can be effective in decreasing obesity stress and increasing dietary self-efficacy. Parents, school nurses and the other support groups should be encouraged to participate from the planning stage of the program to be effective in weight control of obese elementary school children. Also school-based program should be implemented as an essential course in the curriculum, not as an elective.

• Human Ecology Research
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• v.56 no.3
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• pp.283-300
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• 2018

This study examined the effects of a practical problem based home economics instruction using multiple intelligences teaching and learning methods for the prevention school violence by high school students'. The contents of this study are as follow. 1) Develop the practical problem-based instruction using multiple intelligence and teaching and learning strategies for each protective factor both in teaching method aspects and learning content aspects during the 29-period of lesson plans. 2) Examine the effects of the instruction in the changes of pre- and post- impulsivity and aggression, self-esteem, empathy and attitudes to school violence after implementing home economics lesson plans. 3) Evaluate the instruction. The subjects of this study were 288 first grade students (124 male and 164 female students). The study utilizes a quasi-experimental pre-post design. The effect of the instruction by the paired t-test results showed that the aggression and impulsivity by the learners had been lowered; however, empathy and self-esteem increased; in addition, learners' attitudes toward school violence had changed positively. In conclusion, self-esteem in school as sub-variables of self-esteem increased; however, there was no statistically significant difference.

• Proceedings of the Korea Society of Design Studies Conference
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• 2004.05a
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• pp.352-353
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• 2004

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 2004.11a
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• pp.300-300
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• 2004

• Journal of the Korean Society of School Health
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• v.17 no.2
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• pp.127-150
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• 2004

Objectives: The purpose of this study is to provide a basic structure for the establishment of the direction of school health programs, an overview of the historical changes of school health programs and their results, and a conceptual framework on school health programs. Methods: The data analysis has been done using a statistical almanac, relevant laws and regulations, operation handbook of the program, theses, reports, records of public hearings, and other reports as a technical research primarily based on evidence. The methodology of this research classifies the development and growth transition of school health programs during a historical period through the investigation of regulations, organization, manpower, and its program via its development process and to provide a basic tool to design a solid school health policy. Results: A The growth and development of school health programs The development of school health programs was classified into three different periods including the forthcoming period (1945~1967), the completion period (1967~1993), and the actualization period based on the establishment of legislation for School Health Law, other relevant legislation, and the contents of school health programs (1993~present). B. Policy direction of school health programs School health programs have reestablished their goals and range based on basic direction, and developed the W1it model of information structure for school health program management and its basic structure. Finally, the stepwise support system through the building of the school health support center is recommended. (1) The basic direction of school health programs has proposed 7 basic goals to reestablish the policy direction of health improvement based on total health. (2) The W1it model of information system and the school health information system for school health program management has been developed to utilize positive management. (3) School health policy through the study of the health laws and systems has been developed. The necessity of school health support center for the policy support, functional support and operation support has also been proposed. Conclusions: It is necessary to build a school health support center that consists of health professionals in charge of policy support, functional support, and program support of school health programs in order to realize and develop new policy.