• Journal of Ecology and Environment
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• v.46 no.1
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• pp.1-7
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• 2022

Background: In this study, we proposed that the population dynamics of non-native red-eared sliders (Trachemys scripta elegans) depends on the species' habitat extension and survivorship. We used a logistic equation with time-dependent habitat carrying capacity. In detail, the present carrying capacity depends on the red-eared slider population of the previous year. Anthropogenic activities such as the abandonment of previously captive red-eared sliders or the release due to religion customs would supply new habitats to the species. Therefore we assumed that anthropogenic spread increases the habitat carrying capacity. Based on the urbanization increase rate of 3% in Korea from 1980 to 2000, we assumed an annual spread of 3% to simulate the population dynamics of the red-eared slider. In addition, the effect on the population of an increase of natural habitats due to migration was simulated. Results: The close relationship between the distributions of non-native red-eared sliders and of urbanized areas demonstrates that urbanization plays an important role in providing new habitats for released individuals. Depending on the survivorship, the population of the red-eared slider in Korea increased 1.826 to 3.577 times between 1980 and 2000. To control population growth, it is necessary to reduce carrying capacity by reducing habitat expansion through prohibition of release into the wild ecosystem and careful managements of the wetland or artificial ponds. Changes in the habitat carrying capacity showed that the population fluctuated every other year. However, after several years, it converged to a consistent value which depended on the survivorship. Further, our results showed that if red-eared sliders expand their habitat by natural migration, their population can increase to a greater number than when they have a 99% survivorship in a fixed habitat. Conclusions: Further introductions of red-eared sliders into wetlands or artificial ponds should be prohibited and managed to prevent future spread of the species. Moreover, it is important to reduce the species' survivorship by restoring disturbed ecosystems and maintaining healthy ecosystems.

• Education of Primary School Mathematics
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• v.26 no.4
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• pp.333-348
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• 2023

Clear analysis and diagnosis of various characteristic factors of individual students is the most important in order to realize individual customized teaching and learning, which is considered the most essential function of math artificial intelligence-based digital textbooks. In this study, analysis factors and tools for individual customized learning diagnosis and construction models for data collection and analysis were derived from mathematical AI digital textbooks. To this end, according to the Ministry of Education's recent plan to apply AI digital textbooks, the demand for AI digital textbooks in mathematics, personalized learning and prior research on data for it, and factors for learner analysis in mathematics digital platforms were reviewed. As a result of the study, the researcher summarized the factors for learning analysis as factors for learning readiness, process and performance, achievement, weakness, and propensity analysis as factors for learning duration, problem solving time, concentration, math learning habits, and emotional analysis as factors for confidence, interest, anxiety, learning motivation, value perception, and attitude analysis as factors for learning analysis. In addition, the researcher proposed noon data on the problem, learning progress rate, screen recording data on student activities, event data, eye tracking device, and self-response questionnaires as data collection tools for these factors. Finally, a data collection model was proposed that time-series these factors before, during, and after learning.

• Journal of Engineering Education Research
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• v.15 no.4
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• pp.21-25
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• 2012

In this paper, the purpose and overview of the "Frontier Leadership Program for Engineering Students through Joint Participation of Higher Education and the Industrial Sector" (FLC: Frontier Leadership Course) in Gunma University is reported together with our achievements during the last three years. The purpose of this special educational program is to promote and educate selected students who are highly motivated to learn science & mathematics and to become an active leader in industrial sectors or research institutes. The activity can be divided into two categories: "Student-Proposed Stream" and "Advanced Research Stream". These activities were found to be useful to cultivate student's leadership and global communication ability. Furthermore, most of the FLC students cultivated the excellent academic performance and five students among them will be allowed to skip their fourth undergraduate year and enter directly into our graduate school.

• Journal of Gifted/Talented Education
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• v.7 no.2
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• pp.69-92
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• 1997

The purpose of the study was to evaluate the effects of the enrichment program for the gifted on gifted childrens development of the logical thinking and science process skills. The enrichment program consists of 200 enrichment courses in language arts, mathematics, sciences, social sciences and thinking for children at the age of 30 months to Grade 8. Enrichment programs are characterized as process-oriented, student-choice available, activities-oriented, open-ended, and interdisciplined. Subjects were 123 gifted children from Grade 1 to 3 at the Korean Academy of Gifted Education (KAGE), whose IQ scores were above 130 at their entry point to KAGE. Children were divided into two groups depending the duration of the program participation. Older Group participated in the program for longer than 13 months, while Newer Group did for shorter than 12 months. Mean of IQs of the two groups were not significantly different. They were tested on Logical Thinking Test and Integrated Process Skills Test revised by KEDI into Korean version in 1991. Descriptive statistics were calculated and group differences were analyzed with t-test, and scheffe test. The main finding were as follows: There were not significant differences between gender. Children in higher grades showed higher level of development. Older groups showed significantly higher level of logical thinking level of development. Older group showed significantly higher level of logical thinking and process skills than the Newer group inspite of the similar IQ levels to each other. The longer the gifted child participate in the enrichment program, the higher the development of childrens thinking skills.

• Proceedings of the KAIS Fall Conference
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• 2012.05a
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• pp.153-157
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• 2012

본 연구는 수 과학의 과정중심 통합 활동이 유아들의 과학적 탐구능력과 태도에 미치는 영향에 대해 알아보고 현장에서의 효율적인 교수학습 및 환경구성을 마련하는데 연구의 목적을 두고 있다. 연구대상은 전라북도 I시에 위치한 W대학 부속 유치원 만3세 만5세 유아 89명을 대상으로 각 연령별 주제를 선정하여(만3세 유아는 알, 콩, 열매, 과자, 만5세 유아는 공룡, 감자, 물, 그림자, 색깔이라는 주제 선정) 수 과학의 과정중심 통합 활동을 실행하였다. 자료 분석은 SPSS for Windows 프로그램을 이용하여 대응표본 t검증을 실시하였다. 수 과학의 과정중심 통합 활동을 실시한 결과 과학적 탐구 능력과 과학적 태도를 구성하고 있는 각 하위 요인들이 연령별, 성별로 유의한 차이가 있는 것으로 나타났다. 이러한 결과는 수 과학 과정중심 통합 활동이 만3세 5세 유아들에게 긍정적인 영향을 주는 활동임을 시사하고 있다.

• East Asian mathematical journal
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• v.28 no.2
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• pp.215-232
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• 2012

The methods of selection through observations and recommendations were introduced in the process of recruiting new students for the science education institutes for the gifted attached to 25 universities recently. This paper itemized the methods of screening through observations and recommendations. This paper also analyzed the problems with the methods and attempted to create plans for their improvement. The methods of selection through observations and recommendations led to the positive results that students' usual activities and attitudes in the classroom were reflected on the evaluation and that the cost of their private lessons was also reduced. However, the methods showed a few problems that need to be corrected. We point out problems occurring with examining their documents for submission and interviews. It was not easy to grade candidates' gifts, creativity, potential and development within the contents of the documents and the limited time of conducting interviews. On the plans for the developments of the implemented methods of selection through observations and recommendations, we have several suggestions. The chances for teachers' in-service training of learning the methods of selection through observations and recommendations need to be expanded. The interview needs to be enhanced and to have the same weight as the document screening. To secure the continuity of the education for the gifted, the clear guidelines from the Ministry of Education, Science, Technology along with the cooperation of the education institutes for the gifted are essential.

• The Journal of Korean Association of Computer Education
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• v.15 no.5
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• pp.33-41
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• 2012

Elementary school students should have many opportunities to find their abilities and talents. However, informatics education in Korea does not target the entire elementary school students, opportunities for informatics education are given only to some students. Unlike possibilities to find mathematics gifted students and science gifted students, opportunities to find informatics gifted students are very limited. This study aims to solve current problems through a robot education program based on SEM(Schoolwide Enrichment Model). Using modified curriculum and school enrichment cluster, robot programming education is implemented at the pilot school. The result shows that robot education program based on SEM improved creative potentials of elementary school students.

• Archives of Pharmacal Research
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• v.25 no.5
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• pp.669-674
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• 2002

Glycosaminoglycans (GAGs) were isolated from the porcine testis, and their immuno-modulating and anticoagulant activity was investigated. From anion exchange chromatography (Dowex Macropolous Resin) used for further isolation of porcine testis GAGs (PT-GAGs), two fractions (PT-GAG-1.5 and PT-GAG-16) eluted by different salt concentration were obtained. In immunomodulating activity test, PT-GAG-1.5, but not PT-GAG-16, significantly enhanced the growth of murine peritoneal macrophages. In addition, treatment with PT-GAG-1.5 induced the production of cytokines, interleukin-1$\beta$ (IL-1$\beta$), interferon-${\gamma}$ (IFN-${\gamma}$) and tumor necrosis factor-$\alpha$ (TNF-$\alpha$), from murine microphages. Unexpectedly, both of PT-GAGs had no effect on the growth of murine splenocytes. The anticoagulant activity of PT-GAG-1.5 and PT-GAG-16 was examined by activated partial thromboplastin time (aPTT) assay and thrombin time (TT) assay. Both of PT-kGAGs significantly increased the clotting times of aPTT and TT in a dose-dependent manner. The anticoagulant activity of PT-GAG-16 was found to be higher than that of PT-GAG-1.5. These results suggest that PT-GAGs possess biological activities such as immunomodulating activity and anticoagulant activity.

• East Asian mathematical journal
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• v.33 no.4
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• pp.381-411
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• 2017

The purpose of this study is to investigate how students' mathematical creativity changes through problem-solving instruction using problem-posing for elementary school students and to explore instructional methods to improve students' mathematical creativity in school curriculum. In this study, nonequivalent control group design was adopted, and the followings are main results. First, problem-solving lessons with problem-posing had a significant effect on students' mathematical creativity, and all three factors of mathematical creativity(fluency, flexibility, originality) were also significant. Second, the lessons showed meaningful results for all upper, middle, and lower groups of pupils according to the level of mathematical creativity. When analyzing the effects of sub-factors of mathematical creativity, there was no significant effect on fluency in the upper and middle groups. Based on the results, we suggest followings: First, there is a need for a systematic guidance plan that combines problem-solving and problem-posing, Second, a long-term lesson plan to help students cultivate novel mathematical problem-solving ability through insights. Third, research on teaching and learning methods that can improve mathematical creativity even for students with relatively high mathematical creativity is necessary. Lastly, various student-centered activities in math classes are important to enhance creativity.

• Education of Primary School Mathematics
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• v.16 no.3
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• pp.193-209
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• 2013

This study was designed to identify how teachers and students solve problems and communicate with each other during the course of study through application of PBL questions that can be utilized in math ratio and graph sections of the 6th-grade elementary school curriculum in class. Therefore we haved figure it out that through pbl class student acquired a propound knowledge in math and showed self-directed learning through various communication activities, and that they finally showed positive attitude and confidence in this subject.