• 한국초등과학교육학회지:초등과학교육
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• 제34권4호
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• pp.458-475
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• 2015

The purpose of this study was to analyze the responses of pre-service elementary teachers to the plant learning using plant-observation activities and observation journal writings. Thirty pre-service teachers participated in this study. Before and after practicing plant observation and observation journal writing for 11 weeks, pre-service teachers' interest to plants, attitude to plant-observation teaching, and plant-observation teaching efficacy were examined using a questionnaire. Also, the observation journals, reflective journal writings, and interviews were analyzed to investigate their qualitative change. In addition, the pre-service teachers were classified by multi-dimensional scaling and cluster analysis with respect to attitude to plant-observation teaching and observation journal writing, and teaching efficacy. While the pre-service teachers showed significant increase of the interest to plants and plant-observation teaching efficacy, and positive change of the attitude to plant-observation teaching, there was a little difference between gender with more positive effects on females. The positive attitude changes of pre-service teachers included positive recognition about plants and the diversity, increased interest and curiosity about plants, careful observation about nearby plants, and independent learning and positive inquiry with plants. In terms of teaching efficacy, they showed positive change such as enjoyment and satisfaction with plant-observation, confidence as elementary teachers in the future, and recognition about the importance of elementary teachers for plant education. However, the changes were different among the groups classified by attitude to plant-observation teaching and observation journal writings, and plant-observation teaching efficacy.

• 한국초등과학교육학회지:초등과학교육
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• 제41권3호
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• pp.457-467
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• 2022

본 연구는 초등학교 3학년 학급에서 학급 운영의 일환으로 식물 관찰 활동을 1년 동안 진행하며 학생들에게 미친 효과가 무엇인지 탐색한 연구이다. 식물 관찰 활동의 효과를 살펴보기 위해 식물 관찰 활동을 시간적인 순서에 따라 기술하며 관찰 유형을 분석하였고, 학생들이 느낀 인식적 정서를 분석하였다. 본 연구의 결론은 다음과 같다. 첫째, 꾸준한 식물 관찰 활동은 학생들의 관찰 유형에 의미 있는 변화를 일으켰다. 둘째, 식물 관찰 활동은 학생들이 긍정적인 정서를 가지고 참여하도록 유도하였다. 즉, 꾸준한 식물 관찰 활동은 학생들이 다양한 감각을 활용하여 관찰하도록 하였고, 흥미를 높이고 호기심을 키우며 재밌게 참여한 후에는 만족을 주는 배움을 이끌어냈다.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2003년도 학술대회논문집
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• pp.299-303
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• 2003

We research hardware and software for measurement of most suitable condition of the plant growth. that is put of the future oriented that plant growing system. The environment cannot offer the most suitable condition of the plant growth. so we are approached most suitable condition of the plant growth by adjustment of artificial condition of the plant growth but in theses experiment includes some fault that is subjectivity of observation. therefor we develop vision equipment and software for objective observation measurement.

• 한국초등과학교육학회지:초등과학교육
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• 제41권4호
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• pp.593-615
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• 2022

본 연구는 야외 식물 관찰 학습에서 초등학생의 관찰 능력과 과학 창의성의 관계를 알아보고, 관찰능력과 과학 창의성에 영향을 미치는 요인에 대해 알아보았다. 이를 위해 서울특별시 5학년 21명을 대상으로 야외 식물 관찰 학습을 시행했다. 관찰 과제를 통해 학생의 관찰 능력과 과학적 창의성을 평가하여 정량적 자료를 얻은 뒤, 식물 관찰에 대한 학생과의 면담을 통해 정성적 자료를 얻었다. 이외에도 연구자의 참여 관찰 기록, 학생의 활동 결과물 등 다양한 자료를 수집함으로써 연구의 타당성을 높이고자 했다. 본 연구의 주요 결과는 다음과 같다. 첫째, 초등학생을 관찰 능력과 과학 창의성 상·하 수준에 따라 HH(고관찰-고창의)형, HL(고관찰-저창의)형, LH(저관찰-고창의)형, LL(저관찰-저창의)형의 4개 집단으로 유형화한 결과 전체 학생 21명 중 HH형과 LL형에 속한 학생이 15명으로 관찰 능력이 높을수록 과학적 창의성이 높은 것으로 나타났다. 둘째, 관찰 능력과 과학 창의성은 정적인 상관관계를 보였으며. 특히 과학 창의성 요소 중 독창성과도 관찰 능력과 약한 정적 상관관계를 보였다. 셋째, 야외 식물 관찰 학습에서 초등학생의 관찰 능력에 영향을 미치는 요인은 평상시 식물 관찰 빈도와 식물 관찰 학습에 대한 흥미, 식물 관찰 학습에서의 협력이었다. 넷째, 야외 식물 관찰 학습에서 과학 창의성에 영향을 미치는 요인은 관찰 능력과 식물 관련 지식의 양임을 알 수 있었다. 이러한 분석을 바탕으로, 본 연구는 관찰 능력과 과학 창의성을 향상시키기 위한 교육적 방법에 대해 논의하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.232-234
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• 2003

In this treatise, we research hardware and software for measurement of most suitable condition of the plant growth. that is part of the future oriented that plant growing system. The environment cannot offer the most suitable condition of the plant growth. so we are approached most suitable condition of the plant growth by adjustment of artificial condition of the plant growth but in theses experiment includes some fault that is subjectivity of observation. therefor we develop vision equipment and software for objective observation measurement.

• 한국식물병리학회지
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• 제12권4호
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• pp.471-475
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• 1996

콩나물의 생육부진과 부패는 콩나물 재배에 중요한 제한요인이다. 콩나물 부패 병원 진균으로 Fusarium moniliforme, F. oxysporum과 F. solani를 분리 동정하였다. 이들은 종자 발아 후 3∼5일이 지난후 콩나물의 중간 이하에 연한 갈색의 외부 병징을 만들며 발아 후 6∼7일 경에 병징이 더욱 진전하여 진한 갈색의 외부 병징을 나타냄으로써 콩나물에 대한 병원성이 인정되었다. Hand-section과 microtome-section에 의한 병태 조직학적 관찰에서 F. oxysporum 접종 후 4일이 경과하여 초기 병징을 보인 조직에서 균사가 피층, 세포간극, 목부, 사부, 수에 분포하고 있음이 관찰되었다.

• 한국환경복원기술학회지
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• 제15권1호
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• pp.27-33
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• 2012

This study was performed in the Tropical Plant Resources Research Center of Korea National Arboretum to assess the effects of natural enemy attack on aphid population feeding on tropical plants. We measured the density of leaf-feeding aphids, Myzus persicae and Aphis gossypii, cohabiting with 5 types of tropical plants at intervals of approximately 2 weeks after introducing their natural enemy, Aphidius colemani. The density of aphids cohabiting with 4 types of tropical plants-Sanchezia parvibracteata, Hibiscus rosa-chinensis, Ficus kurzii, and Aloysia triphylla-started decreasing after 2 weeks of observation and was completely in control after 4 weeks of observation; however, the density of aphids cohabiting with the tropical plant, Hamelia patens, increased during 22 weeks of observation but decreased after the $23^{rd}$ week of observation. We suggest that a banker plant is necessary for the maintenance of A. colemani in tropical greenhouses, and monitoring studies on H. patens, which was weakest against the aphids, should be performed. Our results indicate that biological pest management strategies using their natural enemies were formulated for the construction of new tropical greenhouses.

• 환경영향평가
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• 제6권2호
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• pp.81-92
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• 1997

This paper presents the results from the comparison analysis and evaluation between the air pollutant dispersion modeling results and the observation data in the area within a 10 km radius from the Boryong thermal power plants. The observation data used in this study were the air pollutant concentrations which had been continuously measured from 8 locations around the Boryong power plants by TMS(tele-monitoring system) for 3 months from September to November, 1996. The short-term and long-term predictions were carried out using ISC3 model and LPDM(Lagrangian Panicle Dispersion Model). The results of ISC3 modeling in a short-term showed highly as 0.7 in a correlation coefficient, but in a long-term showed just 0.54. On the other hand, LPDM showed 0.78 in a correlation coefficient for a long-term, but in a short-term showed highly value than the observation concentrations.

• 한국식물병리학회지
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• 제14권5호
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• pp.496-501
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• 1998

Incidence of rice blast on new rice cultivars and elite lines was observed from 1995 to 1997 in Icheon, Chuncheon, Jecheon and Naju areas. The observation was made in the nurseries and fields. In the nurseries, three cultivars Grubyeo, Sangjuchalbyeo and Suwon 414 showed moderate levels of resistance to leaf blast, with the disease index 0 to 5. From the field observation, it was found that cultivars Heugjinjubyeo and Unbong 18 were highly resistant to leaf blast, but susceptible to neck blast. In general, there was a great variation yearly and regionally in the incidence of neck blast within the same cultivar, ranging from 0 to 100%. However, the range of neck blast infection was relatively narrower in the cultivars Yunghaebyeo (0∼2.4%) and Suwon 414 (0∼2.2%) during observation period. Races of rice blast fungus were variable at different areas. Among them dominant races were KI-409, KJ-201 and KJ-301.

• 전기의세계
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• 제22권4호
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• pp.17-24
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• 1973

In the view point of practical engineering the identification problem may be considered as a problem to determine the optimal model in the sense of minimizing a given criterion function using the input-output records of the plant. In the system identification the statistical approach has been known to be very effective when the topological structure of the system and the statistical characteristics of the observation noises are known a priori. But in the practical situation there are many cases when the inforhation about the observation noises or the system noises are not available a priori. Here, the authors propose a new identification method which can be used effectively even in the cases when the variances of observation noises are unknown a priori. In the method, the identification of unknown parameters of a linear diserete system is achieved by minimizing the improved quadratic criterion function which is composed of the term of square equation errors and the term to eliminate the affection of observation noises. The method also gives the estimate of noise variance. Numerical computations for several examples show that the proposed procedure gives satisfactory results even when the short time observation data are provided.