• Communications of Mathematical Education
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• v.16
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• pp.81-91
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• 2003

이 논문에서는 학습자가 동적 수학 개념과 관련하여 오개념을 가지고 있는 현상에 주목하여 대학생들이 가지고 있는 동적 개념과 관계된 오개념을 분석하고 지도방법을 제시하고 있다. 오개념 분석은 대학생을 대상으로 한 설문조사결과를 바탕으로 하였으며, 그 결과 많은 학생들이 동적인 개념을 정적인 개념으로 이해하고 있는 것으로 나타났다. 이러한 오개념을 진단하고 처방하는 방법으로 동적 기하(Dynamic Geometry System)을 택하고, 이를 이용한 동적 수학 탐구학습이 가지는 특징을 살펴본다.

• Journal of the Korean Chemical Society
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• v.54 no.1
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• pp.142-149
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• 2010

In this study, we investigated pre-service chemistry teachers' awareness and perceptions of middle school students' misconceptions and their perceived educational needs. A survey was administered to 87 seniors at the department of chemistry education of five colleges of education. The instrument was consisted of a test for their awareness and perceptions of students' misconceptions on chemistry topics and an educational need test for their experiences and needs for learning them. Analyses of the results revealed that most pre-service teachers were not thoroughly aware of students' misconceptions related to the particulate nature of matter. The perceptions of a necessity of knowing misconceptions and a willingness to deal with them were positive. However there were few pre-service teachers addressing them according to the constructivism. The pre-service teachers encountered misconceptions through chemical education courses, and had difficulties in practicing teaching strategies addressing misconceptions because of limited examples of misconceptions and insufficiencies of methods/materials in teaching. They also needed lectures and practices related to students' misconceptions. Educational implications of these findings are discussed.

• Journal of the Korea Organic Resources Recycling Association
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• v.11 no.2
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• pp.86-96
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• 2003

This study was conducted to investigate use possibility of pharmaceutical byproducts(process sludge) and waste water sludges as raw materials of organic compost at Fertilizer Official Regulation of Fertilizer Management Law in 2002. All pharmaceutical byproducts were satisfied the standard levels of raw material regulated in organic compost, some waste water sludges were deficient in the level. The content of n-hexane extractable material(HEM) was in byproduct higher than in waste water sludge. This was presumed that the sludge with containing a lot of organic matter was high in HEM content. Of the whole microorganism flora, bacteria was mainly detected, and yeast and filamentous fungi took up less population which was fluctuated depending on the source of sludges. Most dominated bacteria were identified into Genus of Pseudomonas. Pseudomonas syringae and Rathayibacter bathayi was classified as plant pathogenic bacteria.

• Korean journal of food and cookery science
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• v.27 no.4
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• pp.35-46
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• 2011

We developed hasuo jeungpyun with added polygonum multiflorum Thunb powder to increase the functional value and flavor of traditional jeungpyun. Hasuo jeungpyun containing 0, 2, 4, 6 and 8% polygonum multiflorum Thunb powder was prepared and the moisture contents, pH, color, texture and sensory analysis of the samples were measured. With increasing polygonum multiflorum Thunb powder content, the moisture content of hasuo jeungpyun decreased, and pH increased significantly. Hasuo jeungpyun prepared with 2-4% polygonum multiflorum Thunb powder displayed significantly higher swelling power. As the level of polygonum multiflorum Thunb powder increased, the L-value decreased, whereas the a- and, b-values increased. A textural profile analysis showed that the hardness increased but cohesiveness decreased with increasing polygonum multiflorum Thunb powder content. A sensory evaluation showed the highest value for air cell uniformity, flavor, and overall acceptability of 4% hasuo jeungpyun, which suggests hasuo jeungpyun with improved sensory characteristics. In the analysis of the correlation between sensory characteristics and mechanical properties of hasuo jeungpyun, hardness and brittleness were negatively correlated with after swallow, appearance, flavor, texture, taste, and overall acceptability.

• Journal of The Korean Association For Science Education
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• v.33 no.6
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• pp.1139-1153
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• 2013

Misconceptions are one of the most important and long-lasting studied themes on science education. It is because their nature is obstinate and settled as well as they corrupt students' understanding of science concepts. This study examines whether preservice elementary school teachers enrolled in biology teaching material research course changed positively on science teaching efficacy and correcting life science misconceptions when they used the handbook developed for this study. The handbook comprises 203 life science concepts surveyed among preservice teachers holding from advanced researches and arranged by 2007 Revised Science Curriculum. 107 preservice elementary school teachers participated in the study. Forty-six (46) of them were assigned to the experimental group and the other 61 to the control group. ANOVA was conducted for analyzing data. Science Teaching Efficacy Belief Instrument (STEBI) and the life science misconception test which was developed for this study, were administrated as assessing instruments for pretest and posttest. The experimental group, using the handbook, acquired higher scores in both tests on statistical significance level than the control group who were not using the handbook. The results indicate the handbook developed for correcting life science misconceptions for this study is effective in enhancing science teaching efficacy and correcting life science misconceptions.

• Journal of Bio-Environment Control
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• v.24 no.2
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• pp.119-122
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• 2015

The experiment was carried out to examine the effect of pinching time on growth and marketable yield of okra in rain shielding vinyl houses. Okra (Abelmoschus esculentus L., 'Green sod') seedling was transplanted in May, 2013. Pinching times of okra were in each 30th, 45th, 60th day after transplanting of okra. Shoot branch and top fresh weight were significantly different between each pinching times. Top fresh weight were highest at 60th day pinching time after transplanting investigated, and were lowest at 30th day pinching time after transplanting. There was no significant difference in plant height and stem length among pinching times. According to pinching times, marketable yield and number of okra fruits were varied. Marketable yields were highest at 60th day after transplanting, whereas were lowest at 30th day after transplanting. Mineral concentrations of okra fruits were not significantly different among pinching times. Therefore pinching times 60th day after transplanting was effective to increase yield of okra fruit in rain shielding vinyl houses.

• Journal of Science Education
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• v.44 no.3
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• pp.289-299
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• 2020

In this study, the definition, the level of difficulty, and the certainty of the understanding of 113 astronomy terminologies from 2009 revised middle school geoscience textbooks were examined. And through further interviews, the types of students' misconceptions about astronomy terminologies and their representative terms - examples of misconceptions were analyzed. The definitions of the terms presented by the students were largely classified as correct, low-level, and incorrect understanding. And low-level understanding was subdivided into high-level definition descriptions, undifferentiated concepts, and incorrect answers were subdivided into interference by scientific misconception and lack of prior knowledge. Given that the misconceptions due to terminologies can be distinguished from the prior misconception, the misconceptions due to terminologies can be effectively prevented by changing the term itself. In addition, students were aware of the advantages and disadvantages of metaphorical terms, and the recognition of their level of understanding is expected to be a good starting point considering that recognizing their own misconceptions is the first step in correcting them. Terminologies in science education is always an important subject of discussions, striving to select the right term according to the times, and scientific terms may change. It is expected that the results of this study will be the basis for discussions on the modification of terms.

• The Journal of Korean Association of Computer Education
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• v.5 no.3
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• pp.117-126
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• 2002

Many students have some misconception on electric current, and they are not corrected easily by traditional instruction. In this paper, a multimedia title was developed for misconception correction on electric current, and applied to the students and investigated its effects. The subject of this study consists of 32 students of a middle school. The group is divided into two subgroups. the applied group and the compared group. each of which has 16 students. The achievement is estimated by t-test using SPSS. The result shows that current consumption concept was corrected easily and it had no relation with instruction methods. Educational multimedia title was especially effective in the class to correct the misconception of current distribution concept. It was difficult to correct current independent of resistance concept by the multimedia title.

• KIPS Transactions on Computer and Communication Systems
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• v.6 no.2
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• pp.87-94
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• 2017

Microsoft Office is an office suite of applications developed by Microsoft. Recently users with malicious intent customize Office files as a container of the Malware because MS Office is most commonly used word processing program. To attack target system, many of malicious office files using a variety of skills and techniques like macro function, hiding shell code inside unused area, etc. And, people usually use two techniques to detect these kinds of malware. These are Signature-based detection and Sandbox. However, there is some limits to what it can afford because of the increasing complexity of malwares. Therefore, this paper propose methods to detect malicious MS office files in Computer forensics' way. We checked Macros and potential problem area with structural analysis of the MS Office file for this purpose.

• Korean Journal of Plant Resources
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• v.12 no.3
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• pp.204-208
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• 1999

We carried out this study to confirm the possibility of C. wilfordii cultivation using crop as a substitute for stake or net, and tested sit support crops, i.e., soybean, peanut, Perilla frutescens var. acuta Kudo, Job's tears, sorghum, and corn compared with net support. Effects of support crops on growth and root yield of C. wilfordii were as follows. Attracting efficiency of vine showed 94∼100% among crops. The number of branches per plant was 1 or 2 more in p. frutescens var. acuta Kudo, Job's tears, and sorghum support than in net support. Fresh root yield per 10a was 919kg in net support, while it was 717kg in P. frutescens var. acute Kudo, 656kg in Job' tears, and 652kg in sorghum support. However, the problem of decreased yield in these support crops could be overcome by cost saving of staking installation and by harvesting support crops. Therefore, C. wilfordii cultivation using P. frutescens var. acute Kudo, Job's tears, and sorghum as support crops showed most effective in labor and cost saving.