• Journal of Biosystems Engineering
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• v.24 no.3
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• pp.267-274
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• 1999

An internet and network based software and related interface have been developed, which can remotely control and manage an on-site operating system. Developed software modules were composed of two parts: monitoring/management modules and control/diagnosis modules were developed for the network status, warehouse, production and selling status. Modules of control with diagnosis were developed for the on-site operating system and interface. Each module was integrated and the whole modules have been tested with an automatic mushroom grading/sorting system which was built in a laboratory. Developed software modules worked successfully without any uncommon situations such as system down caused by the software or data transfer error. Each software module was developed independently in order to apply easily to other existing on-site systems such as rice processing centers, fruit and vegetable sorting, packaging and distribution centers scattered over the country.

• Korean Journal of Child Studies
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• v.22 no.4
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• pp.85-97
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• 2001

This study examined the effects of mother's support and peer acceptance on children's domain specific self-esteem and the moderating effects of best friend's support. The subjects were 272 $4^{th}$ and 349 $8^{th}$ grader in Chin-ju. Data were analyzed by the SAS/PC+ program, including Cronbach's ${\alpha}$, Pearson's correlation, multiple regression and two-way ANOVA. Findings were that peer acceptance had a higher influence on academic-general self, peer-related self, physical-appearance self, personality self and physical-competence self than did mother's support. Mother's support had a higher influence on home self than did peer acceptance. Best friend's support and mother's support interacted with children's physical-appearance self and physical-competence self. Best friend's support and peer acceptance interacted with student's peer-related self.

• Journal of Fisheries and Marine Sciences Education
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• v.28 no.1
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• pp.69-82
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• 2016

In this study, Art area -based STEAM education programs that take advantage of the Scratch was to analyze the effect of the development of elementary school students' creativity. The winter break of ${\bigcirc}{\bigcirc}$ university education donation application students 3, 4, 5th grader was verified two research hypothesis to the target. First, Art area -based STEAM education programs will be effective on the development of elementary school students' creativity. Second, Art area -based STEAM education programs will be more effective on the development of the elementary school girls' creativity than the elementary school boys' creativity. Art area -based STEAM education programs is to show a significant difference on the development of elementary school students' creativity, mean change of elementary school girls were remarkable than boys.

• Journal of the Korean School Mathematics Society
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• v.14 no.1
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• pp.43-64
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• 2011

The purpose of this study was to analyze the progress of children's abstraction and to investigate how elementary students understand through mathematical modeling approach in the sixth grader's learning of surface area. Each small group showed their own level on abstraction in mathematical modeling progress. The participants showed improvements in understanding regarding to surface area context.

• Journal of Biosystems Engineering
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• v.24 no.1
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• pp.1-8
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• 1999

In this study, the physical properties of live garlic at the harvesting season were measured and analyzed as a fundamental study for developing a garlic harvester. A universal testing machine and a machine vision system were used to obtain mechanical and morphological properties of live garlic, respectively. The moisture content of live garlic at the harvesting season was 50% higher than that of dried garlic. The root of live garlic elongated greatly with respect to the applied tensile force. The relationship between the projected area and the weight of a bulb of live garlic was linear. Such a feature would be applied to develop an effective garlic harvester or garlic quality grader. Other useful physical properties of live garlic at the harvesting season were represented in the study.

• Journal of Educational Research in Mathematics
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• v.10 no.1
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• pp.85-102
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• 2000

The concept of variables is central to mathematics teaching and learning in junior and senior high school. Understanding the concept provides the basis for the transition from arithmetic to algebra and necessary for the meaningful use of all advanced mathematics. Despite the importance of the concept, however, much has been written in the last decade concerning students' difficulties with the concept. This Thesis is based on research to investigate the hypothesis that LOGO programming will contribute to 6th grader' learning of variables. The aim of the research were to; .investigate practice on pupils' understanding of variables before the activity with a computer; .identify functions of LOGO programming in pupils' using and understanding of variable symbols, variable domain and the relationship between two variable dependent expressions during the activity using a computer; .investigate the influence of pupils' mathematical belief on understanding and using variables. The research consisted predominantly of a case study of 6 pupils' discourse and activities concerning variable during their abnormal lessons and interviews with researcher. The data collected for this study included video recordings of the pupils'work with their spoken language.

• Journal of the Korean Society of School Health
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• v.24 no.2
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• pp.190-198
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• 2011

Purpose: The purpose of this study was to compare stress levels of middle school students by grade. Methods: This was a descriptive comparative survey using as convenience sample of 701 1st, 2nd and 3rd-grade students. The stress levels was measured by stress scale that consisted of 65 items regarding personal characters family, school, and peer factors. The data were analyzed by ${\chi}^2$-test, t-test, ANOVA, and multiple regression using the SPSS/WIN 12.0 statistical program. Results: 1st graders and female students showed higher stress levels than 2nd, 3rd graders and male students, respectively. Conclusion: Grade, gender, life satisfaction, and regional levels were all significant factors associated with high stress levels among middle school students. Development of stress management program for this specific population, especially targeting students who are 1st Grader and living in rural areas, is needed.

• Proceedings of the Korean Society for Information Management Conference
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• 2014.08a
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• pp.49-58
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• 2014

초등학교 5학년 학생들을 대상으로 독서부진요인을 알아보기 위한 측정도구를 개발하는데 목적이 있다. 연구방법으로는 질적 양적 연구를 모두 실행하는 혼합연구방법을 선택하였으며, 연구 대상자는 5학년 학생 1,320명으로, 1단계 질적 연구에서는 포커스그룹 인터뷰와 문헌연구를 수행하였다. 2단계 양적 연구에서는 질적 연구에서 도출된 내용을 근거로 예비문항을 개발하여 구조화된 질문지를 제작하였다. 3단계 양적 연구에서는 측정도구의 신뢰성과 타당성을 확보하기 위하여 소수의 학생을 대상으로 2회의 예비조사를 실시하였다. 결과로는 4개 평가영역, 12개 평가항목, 44개 평가내용으로 구성하였다.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.54 no.4
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• pp.366-374
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• 2009

To determine the optimum operating conditions of the indented cylinder length grader based on varietal characteristics, broken rice removal capabilities were measured on the milled rice of 41 varieties at different conditions consisted of 3 types of indented cylinders with different indent-opening diameters and 3 different collecting-angles of broken rice. The broken rice removal capabilities were swayed by the indent's opening diameter and depth as well as the angle of the collecting trough of broken rice on the point of instrument, and by the kernel length and width as well as 1000 grain weight of milled rice on the point of rice variety. When the angle of broken rice collecting-trough reached to near the horizontal center line of the indented cylinder on the direction of upward turning side, which was referred $0^{\circ}$ in this paper, the amount of rice collected in trough increased, whereas the loss of head rice also increased. Considering the removal rate of broken rice as well as loss of head rice, it was thought that the suitable angle of trough for broken rice collecting was located $5^{\circ}$ to $15^{\circ}$ depending on varietal characteristic and indent opening diameter. It was thought that 4.2 mm or more of indent opening diameter was recommendable for the rice varieties having heavier 1000 grain weight than 22.3g, as well as larger sizes than 2.9 and 5.2 mm in width and length of rice kernel, respectively; 3.8 mm for the small-sized thin kernels, and a proper diameter between 3.8 and 4.2 mm for short to middle kernels. The varieties with relatively shorter length compared to width of kernel were more difficult to separate the broken rice than the opposite ones. For effective separation of that, it seems that some specific indent shapes such as wider opening and shallow depth etc. are required. When the broken rice content were excessively high, wider diameters of indent openings than specified sizes were thought to be the better.

• Journal of Science Education
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• v.35 no.2
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• pp.204-220
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• 2011

This study was intended to develop an experimental module based on inquiry processes conducted by photosynthesis scientists. It was aimed to enhance scientific inquiry ability of the middle school students by applying the developed module. Developed module included some experiments conducted by earlier photosynthesis scientists such as Helmont, Woodward, Priestly, Hales and Ingen-Hausz. Inquiry process was involved in the developed module for instructing the inquiry methods. Rapid-cycling Brassica rapa known as a Fast Plant was used for the experimental material. Developed module was applied to the experimental group consisting 27 eighth grader, while experiments suggested in the science textbook was applied to the control group consisting 30 eighth grader. Developed module was more effective in improving students' scientific inquiry ability, especially measuring, forecasting and hypothesizing ability as its subordinate elements. When the result of post-test was compared to one of pre-test in the experimental group, their observing, forecasting, and generalization ability were improved. Experimental group showed that students' conception in photosynthesis and conceptual development related with the role of plants in the ecosystem and plant's food and movement of the water and nutrients were also improved. Before application, students in the experimental group did not have enough understanding of the abstract concept such as the existence or the role of the materials like $CO_2$ or $O_2$ or the energy accumulation. Developed module could help students to achieve the comprehensive concept regarding the role of plants as producers of organic matter and oxygen and to enhance their scientific inquiry ability and concepts regarding photosynthesis.