• KSII Transactions on Internet and Information Systems (TIIS)
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• 제18권1호
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• pp.126-146
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• 2024

Caladium bicolor is one of the most popular plants in Thailand. The original species of Caladium bicolor was found a hundred years ago. Until now, there are more than 500 species through multiplication. The classification of Caladium bicolor can be done by using its color and shape. This study aims to develop a model to classify Caladium bicolor using a transfer learning technique. This work also presents a proof of concept, GUI design, and web application deployment using the user-design-center method. We also evaluated the performance of the following pre-trained models in this work, and the results are as follow: 87.29% for AlexNet, 90.68% for GoogleNet, 93.59% for XceptionNet, 93.22% for MobileNetV2, 89.83% for RestNet18, 88.98% for RestNet50, 97.46% for RestNet101, and 94.92% for InceptionResNetV2. This work was implemented using MATLAB R2023a.

• Applied Microscopy
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• 제45권1호
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• pp.1-8
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• 2015

We have developed a new HD-2700 (Hitachi High-Technologies Corp., Japan) scanning transmission electron microscope (STEM) that includes an automatic aberration correction function, and a large-solid-angle energy-dispersive X-ray spectroscopy detector that enables high-resolution and sensitive analysis. For observation with atomic resolution, using spherical-aberration-corrected STEM, in order that satisfactory performance of the device can be achieved readily, and within a short time, irrespective of the operator's skill level, a spherical-aberration-correction device with an automatic aberration-correction function was developed. This automatic aberration-correction function carries out the entire correction-related process (aberration measurement, selection and correction) automatically, with automatic selection of the aberrations that require correction, and automatic measurement of the appropriate corrections.

• 한국초등과학교육학회지:초등과학교육
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• 제28권1호
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• pp.46-54
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• 2009

The purpose of this study was to examine the perception of students about pseudo-science in consideration to their personality traits, cognitive style, and awareness of the nature of science, which might all have a great impact on their behavior and thinking. The subjects of this study were 129 sixth-grade school children in a small urban community in Gyeonggi province. The way they looked at pseudo-science was investigated after three kinds of traits were selected as variables, including personality traits, cognitive style, and awareness of the nature of science. Four different instruments were utilized, which respectively covered personality traits, cognitive style, awareness of the nature of science and perception of pseudo-science. The results of the study were as follows: First, the children with higher emotional stability and liveliness showed higher permeability towards pseudo-science, while made no significant difference on their view of pseudo-science. Second, their cognitive style made no significant difference to their outlook on pseudo-science. Third, as for link between awareness of the nature of science and pseudo-science, the students with a poor understanding of the nature of science were significantly different from those who had a better understanding of it in perception of pseudo-science(p<.05).

• 한국과학교육학회지
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• 제31권4호
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• pp.491-504
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• 2011

과학영재 학생의 과학학습에 대한 개념을 알아보기 위해 COLS와 ALS 설문지를 이용하여 비교, 분석하였다. 과학영재 학생은 일반 학생과 과학학습에 대한 개념에 차이를 보이는데, 과학영재 학생은 과학학습을 과학 지식을 얻고, 과학 지식 구조를 확장해 나가고, 세상을 보는 새로운 관점을 얻는 활동이라고 인식한다. 과학영재 학생은 성별과 과목 선호도에 따라 과학학습에 대한 인식 및 접근방법에 의미 있는 차이는 보이지 않았다. 이 연구의 결과는 과학영재 수업을 위한 교재와 교수법에 도움이 될 것으로 예상한다.

• 한국육종학회지
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• 제42권6호
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• pp.595-599
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• 2010

A new spray chrysanthemum cultivar 'Prima Donna' was released by National Institute of Horticultural and Herbal Science (NIHHS), Rural Development Administration (RDA), in 2008. The cross was made between 'Plano' and 'Yeonja' in 2005. Trials were conducted from 2006 to 2008 for the evaluation and selection of this cultivar, including shading cultures in summer and retarding cultures in spring. The natural flowering time of 'Prima Donna' is late October, but year-round flowering is possible by photo-periodic control. The cultivar has single type flowers with pink petals, green center and good inflorescence. The growth of plant is very vigorous. The diameter of flower is 7.0cm. The number of flowers per stem and petals per flower are 13 and 42, respectively. Days to flowering under the short day treatment is about 59 and its vase life is 26.1 days in autumn season.

• 한국초등과학교육학회지:초등과학교육
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• 제38권3호
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• pp.387-394
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• 2019

The purpose of this study was to investigate the effects of writing science diary on science learning motivation, science academic achievement and ecological sensitivity of elementary students. Teaching unit was focused on 'The structure and function of plants' in 6th grade science text book. The subjects of study were 51 students of two classes. One class of 25 students, experimental group, wrote science diaries as homework. While the other class of 26 students, comparative group, performed homeworks with fill-in-the-blank worksheets. The results of this study can be summarized as follows: First, writing science diary had a meaningful effect on improvement of science learning motivation. Second, writing science diary had a meaningful effect on improvement of science academic achievement. Third, writing science diary had a meaningful effect on improvement of ecological sensitivity. And we could find that students had a favorable impression and high satisfaction level about writing science diary from the questionnaire.

• 한국지구과학회지
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• 제43권4호
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• pp.557-566
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• 2022

The purpose of this study was to examine the status of the field application of the Science II career electives with the application of the 2015 revised curriculum up to the 3rd year of high school. This study focused on examining high school science teachers' perceptions of the student-participatory class and process-centered assessment in Science II subjects, which are career-intensive high school science electives. A total of 192 science teachers responded to the survey questionnaire, and 12 teachers participated in interviews. In the in-depth interviews conducted to supplement the survey results, questions were asked about changes in the overall class, the status of student-participatory classes, and changes in the assessment of Science II subjects due to the emphasis on process-centered assessment. The main research results included teachers' perceptions of changes in teaching and assessment methods with the application of the revised curriculum, the degree to which the eight skills used in Science II classes develop the key competencies of science, and the teaching and assessment methods commonly used in Science II classes. Science teachers generally agreed with the purpose and necessity of introducing student-participatory classes and process-centered assessment, which are the core purpose of the 2015 revised curriculum. However, they had difficulties in practice due to the excessive content of Science II subjects. Problems were also encountered with securing objectivity and fairness during assessments and the operation of online science classes due to COVID-19.

• 한국과학교육학회지
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• 제26권6호
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• pp.675-690
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• 2006

본 연구의 목적은 체계적이고 종합적인 과학진로교육 프로그램 및 자료를 개발하기 위한 첫 단계의 연구로, 과학 관련 진로에 대한 초, 중, 고 학생들의 생각을 조사하는 것이다. 검사도구는 두 차례의 예비조사를 거쳐 연구자가 개발하였고, 연구대상은 지역 규모에 따른 계층별 표집을 한 초등학생 1036명, 중학생 1137명, 고등학생 1435명, 총 3608명이다. 과학에 대한 이미지, 과학선호도, 과학학습선호도, 과학성적에 대한 인식, 본인의 진로 희망, 과학 직업에 대한 희망 정도, 과학 진로에 대한 인식, 과학 관련 진로 선택과 관련된 주요 요인, 과거 및 현재의 과학 관련 진로 희망 여부 및 그 이유 등을 조사하였다. 조사 결과, 학생들의 과학에 대한 이미지는 '실험활동으로서의 과학'을 가장 많이 지니고 있었고, 과학선호도와 과학학습에 대한 선호도는 과학성적에 대한 인식보다 긍정적이었다. 과학 관련 진로를 희망하는 학생들의 비율은 21%였으며, 중학생의 경우가 특히 낮게 나타났다. 과학 진로를 선택할 때의 좋은 점으로는 '나라 발전에 도움되므로', '새로운 지식을 얻을 수 있으므로', 나쁜 점에 대해서는 '위험하므로', '공부를 많이 해야 하므로' 등을 많이 들었다. 학생들이 과학 관련 진로를 선택하는 이유는 '과학 및 과학 학습에 대한 흥미'가 가장 높은 비율을 차지하는 것으로 나타났다. 이러한 분석 결과로부터 과학진로교육의 기본적 방향은 과학학습에 대한 선호도와 흥미를 높이는 것을 바탕으로 과학직업에 대한 긍정적 인식과 미래 사회에서의 과학관련 직업 전망을 제시해 줄 수 있어야 하며, 대상 학생의 발달 단계와 특성에 맞는 과학진로교육이 이루어져야 함이 더욱 중요하다.

• 대한지구과학교육학회지
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• 제7권1호
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• pp.1-10
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• 2014

The purpose of this study is to introduce the science-play in the regular class, stimulate the student's curiosity, motivate them and take active part in their science class. To make an effective science class, we developed the science-play activity instead of experiments in the text, and applied it to the class. The experimental group has statistically meaningful results in the science process skills, expecially in subordinate elements such as observation, deduction, expectation, data analysis and assumption establishments(p<.01). However, the comparative group has no meaningful results in the science process skills. Though the average value of the science related attitude in the experimental group had only a little increase and had no statistically meaningful results, that in the comparative group has decreased during the same period. As for the experimental group, the science-play activities were repeated and their science related attitude has increased a little. Even though there were no meaningful statistic results(p>.05), the science-play activity was effective in the science related attitude. As a result of this research, it could be said that the science-play activity can improve the student's science process skills and the science related attitude, and the science-play program should be further developed and applied to make easy and effective science classes.

• 한국과학교육학회지
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• 제37권1호
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• pp.17-24
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• 2017

본 연구에서는 과학교육 연구자와 과학교사를 비롯한 과학교육자들의 발명교육에 대한 인식을 조사하였다. 과학교육자들의 발명교육에 대한 인식 조사 도구는 과학교육에서 발명교육의 필요성, 과학교육과 발명교육의 관련성, 과학교사들을 위한 발명교육 연수 요구도 등으로 구성하였다. 연구 대상은 과학교육 연구자 52명과 과학교사 67명으로 총 119명이었다. 설문 조사 결과 과학교육자들은 과학교육에서 발명교육을 포함하는 것에 대해서 상당히 긍정적으로 인식하고 있었으며, 과학교육과 발명교육은 매우 관련성이 높게 인식하는 것으로 나타났다. 발명교육에 대한 현재 이해 수준이 평균을 약간 상회하여 그리 높지 않았으며, 과학교육에서 발명기법의 활용을 위해 과학교사들을 위한 발명교육 연수가 필요하다는 인식을 갖는 것으로 나타났다. 대부분 과학교육자들은 발명교육이 과학과 교육과정에 직접적으로 포함되기 보다는 비교과 활동에서 우선 시행하는 것을 선행할 필요가 있다는 의견을 제시하였다. 또한 실생활 연계, 공학적 설계 및 창의적 사고 등의 측면에서 발명기법이나 발명 교육전략을을 활용한다면 과학교육에도 도움이 되리라 생각된다.