• 수산해양기술연구
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• 제35권3호
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• pp.323-327
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• 1999

Most of the underwater noise emitted by small fishing boat are owing to vibration of main engine and generator etc.. This paper describe on the spectrum analysis of underwater noise by engine generating in small fishing boat in order to build up comfortable environment for fisheries man and to reduce ambient noise. The obtained results are summerized as follows:1. When the underwater noise of 10ton class fishing boat measure and the frequency spectrum in varied revolution of engine 750, 900, 1000rpm analyze, the frequency pattern is similar to each other, the faster revolution of engine increase, the higher frequency spectrum level becomes. 2. In comparison of spectrum level of underwater noise between 10ton class and 14ton class fishing boat, the former level is higher than the latter. 3. Frequency spectrum pattern of two 14ton class fishing boat is similar to each other but spectrum level is a little difference, it is suggested to different by fitting condition of engine.

• 한국보육지원학회지
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• 제17권3호
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• pp.39-64
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• 2021

Objective: This study analyzed the compliance situation of class rules for 3-year olds in the Wisdom class at Sarang kindergarten. Methods: Research participants were composed of 17 young children and two teachers in the wisdom class for 3-year-olds and data collection and analysis were conducted by participant observation using the qualitative method. Results: Research results were as follows. The compliance situation of class rules included compliance, violation, and among compliance and violation. First, compliance was divided into compliance with assistance and self compliance. Compliance with assistance is for young children to follow the rules under the guidance, help, and instructions of teachers. Self compliance is for children to understand and follow the rules themselves. Second, Between compliance and violation is conflict of the rules created by different standards of class rules. Third, depending on who found the violation, violation was classified into teacher discovery, peer discovery, and acquiescence. The teacher discovery led to teacher guidance and teacher acquiescence, The peer discovery led to peer notification, peer resistance, peer punishment, and peer acquiescence. Conclusion/Implications: By looking at the compliance situation of class rules for three-year-olds, the educational implications of how to guide class rules were obtained for children.

• 한국과학교육학회지
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• 제32권5호
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• pp.991-1006
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• 2012

본 연구에서는 고등학교 과학 교사의 수업 전문성 신장에 시사점을 찾고자 교사의 수업 구성에 영향을 주는 요인 분석틀을 개발하였으며, 수업 관찰과 면담에서 나타난 수업 구성 요인들을 확인하고, 이 요인들의 형태와 변화 유형을 분석하였다. 연구 결과, 교사의 수업 구성에 영향을 주는 요인으로는 크게 교사의 자발적 동기가 수업 구성에 작용하는 정적 동기 요인과 외부의 요구가 수업 구성에 작용하는 부적 동기 요인으로 분류할 수 있었다. 정적 동기 요인의 세부 요인으로는 특성 반영 요인, 체험적 요소 반영 요인, 사회 문화적 신념 요인, 대안적 구성 요인, 교과 내용적 신념 요인, 철학적 신념 요인으로 구분할 수 있었으며, 부적 동기 요인의 세부 요인으로는 내용적 인식차이 요인, 사회 문화적 요구 요인, 인지적 변화 요인, 정서적 차이 요인, 부정적 환경 요인, 과정적 보완요인 등으로 구분할 수 있었다. 개발된 수업 구성 요인 분석틀을 바탕으로 수업을 관찰하고 교사를 면담한 결과 정적 동기 요인, 부적 동기 요인들은 수업을 구성하는 단계, 수업을 진행하는 단계, 수업 후 단계에서 모두 나타났으며, 각 요인들은 상황에 따라 부적요인이 정적 요인으로, 정적 요인이 더 강화된 정적 요인 등으로 변화되는 것을 확인하였다. 부적 동기 요인들을 최소화하고 극복하는 것은 교사와 학생 간의 긍정적 상호 작용을 기대할 수 있으며, 수업에 대한 교사의 성취감을 증대시켜 교사의 수업 전문성 신장에 도움을 줄 수 있으며, 더 나아가 교실 수업의 어려움을 극복하는 데 시사점을 제공할 수 있다고 보여진다.

• 한국초등과학교육학회지:초등과학교육
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• 제29권1호
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• pp.1-12
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• 2010

The purpose of this study is to analyze elementary school students' class contents and activities between the invention class for the gifted under the local education office by the 'Gifted Education Promotion Act' and that under the invention classroom by the 'Invention Promotion Act'. For this study, the survey was conducted to 1,788 elementary school students who attended the invention class for the gifted both under the local education office and under the invention classroom. The analysis of the survey showed that the students of the invention class for the gifted under the local education office had higher motivation and participation rate in class, higher interest in invention, and stronger significantly in a future oriented will than those under the invention classroom. The parents of the invention class for the gifted under the local education office showed more enthusiastic attitude to support their students, and had significantly stronger recognition that the participation of the students in the invention education for the gifted helped enter an advanced school than those under the invention classroom. However, the class contents of the invention class for the gifted under the local education office such as 'understanding the influence of the invention history and products on society', 'scientific inquiry skills for problem solving', 'technological and engineering abilities for creating an invention', 'developing knowledge and abilities about business and management by using a new invention' were not different from those under the invention classroom. In addition, discussion and presentation were not active in the class activities of the invention class for the gifted under the local education office. Therefore, the researchers should compensate and develop a program which can apply strategically differentiated class contents and class activities to the students who participate in the invention class for the gifted under the local education office by the 'Gifted Education Promotion Act'.

• Imaging Science in Dentistry
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• 제46권2호
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• pp.117-125
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• 2016

Purpose: This study evaluated and compared interradicular distances and cortical bone thickness in Thai patients with Class I and Class II skeletal patterns, using cone-beam computed tomography (CBCT). Materials and Methods: Pretreatment CBCT images of 24 Thai orthodontic patients with Class I and Class II skeletal patterns were included in the study. Three measurements were chosen for investigation: the mesiodistal distance between the roots, the width of the buccolingual alveolar process, and buccal cortical bone thickness. All distances were recorded at five different levels from the cementoenamel junction (CEJ). Descriptive statistical analysis and t-tests were performed, with the significance level for all tests set at p<0.05. Results: Patients with a Class II skeletal pattern showed significantly greater maxillary mesiodistal distances (between the first and second premolars) and widths of the buccolingual alveolar process (between the first and second molars) than Class I skeletal pattern patients at 10 mm above the CEJ. The maxillary buccal cortical bone thicknesses between the second premolar and first molar at 8 mm above the CEJ in Class II patients were likewise significantly greater than in Class I patients. Patients with a Class I skeletal pattern showed significantly wider mandibular buccolingual alveolar processes than did Class II patients (between the first and second molars) at 4, 6, and 8 mm below the CEJ. Conclusion: In both the maxilla and mandible, the mesiodistal distances, the width of the buccolingual alveolar process, and buccal cortical bone thickness tended to increase from the CEJ to the apex in both Class I and Class II skeletal patterns.

• 대한화학회지
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• 제64권1호
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• pp.38-48
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• 2020

이 연구는 논의기반 탐구 과학수업의 학급 논의 활동에서 나타나는 중학생들의 인식론적 사고의 특징을 알아보고자 5개 주제에 대한 논의기반 탐구 과학수업의 수업 동영상 및 활동지를 수집하여 분석하였다. 연구 결과, 학생들이 학급 논의 과정에서 지식의 원천으로 사용한 증거의 출처로는 실험 자료를 활용한 유형이 가장 많이 나타났으며, 활동 방식에 따라서 개인적인 경험에 기반을 둔 유형과 과학 원리를 증거로 활용하는 유형이 추가로 나타났다. 또한 학급 논의에서 주제에 따른 지식 정당화의 수준 차이는 비슷하게 나타났으나, 주장 정당화의 하위 평가 요소 중 주장 타당성, 증거 타당성 및 논의과정 요소 사용의 수준은 높았지만 반박 타당성의 수준은 낮게 나타났다. 마지막으로 학급 논의 전후의 주장 변화를 분석한 결과, 주장변경 유형은 잘못된 주장의 정정 유형, 불명확한 내용의 명료화 유형, 개념의 확장 유형으로 분류할 수 있었으며, 이 중 잘못된 주장을 정정하는 유형이 가장 높은 비율로 나타났고, 개념의 확장 유형, 불명확한 내용의 명료화 유형의 순서가 차례대로 나타났다.

• 한국콘텐츠학회논문지
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• 제10권7호
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• pp.366-376
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• 2010

본 연구는 초등학교 여교사의 스포츠활동 참여 여부에 따른 체육수업의 차이를 분석하기 위한 것으로 스포츠활동 참여유무, 참여유형, 참여정도(빈도, 강도, 기간)에 따른 체육수업의 차이를 분석하였다. 연구대상으로는 인천광역시 소재 초등학교 교사 중에서 여교사 300명을 대상으로 설문조사를 실시하였으며, 분석방법은 t-검정, 일원변량 분산분석을 사용하였다. 분석결과 스포츠활동에 참여하는 여교사는 비참여 교사에 비해 체육수업 인식 및 체육 교수활동에서 높게 나타났고 통계적으로도 유의한 차이가 있었다. 스포츠 참여 여교사 중에서 스포츠 참여 유형에 따른 체육수업은 간접적 대결 활동군이 수행기록 활동군과 심미적 활동군에 비해 체육 교수활동에서 높게 나타났으며 통계적으로 유의한 차이가 있었다. 스포츠 참여정도에 따른 체육수업은 참여빈도에서 주 2회 이상 참여한 여교사가 주 1회 이하로 참여한 여교사보다 체육교수활동에서 높게 나타났으며 통계적으로도 유의한 결과가 나타났다. 따라서 본 연구에서는 초등학교 여교사의 스포츠활동 참여가 체육수업에 긍정적인 영향을 미친다고 하겠다.

• 한국초등과학교육학회지:초등과학교육
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• 제38권3호
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• pp.331-344
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• 2019

This study aims to analyse science-gifted elementary students' perception of speech in general school class, school science class, and science-gifted class and the relationship between their voluntary speech and scientific creativity. For this, 39 fifth-graders in the Science-Gifted Education Center at Seoul Metropolitan Office of Education in Korea were asked about their frequency of voluntary speech on each class situation, the reasons for such behavior, and their general opinions about speech. Also, researchers collected the teachers' observation on students' speech in class. To get the scores for students' scientific creativity, four different subjects of tasks were presented. The students' scientific creativity scores were used for correlation analysis with their frequency of speech. The main findings from this study are as follows: First, science-gifted elementary students tended to be passive in science-gifted class compared to general school and school science class. Second, the main reason for the low frequency of students' speech in school classes is that they do not have many opportunities to make presentations. Third, a survey of students' general thoughts on speech showed that more students wanted to make a speech voluntarily in class than the opposite. Fourth, the four different scientific creativity tasks had little correlation. Fifth, the correlations between the frequency of voluntary speech and the scores of scientific creativity were mostly low, with significant results only for plant task. Sixth, the correlations between the frequency of voluntary speech and the two components that make up scientific creativity, originality and usefulness, were also mostly low, but significant results for both were found in plant task, with originality having a higher correlation than usefulness. Based on this results, this study discussed the meanings and implications of students' voluntary speech on elementary science education and creativity education.

• 한국항공운항학회지
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• 제29권4호
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• pp.21-27
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• 2021

The paper, in an online learning environment which becomes prolonged for reason of COVID-19, on 80 students belonging to the aviation and aeronautics, proposed more concrete direction for raising effectiveness of online class by analyses of various standpoints regarding the relation between 8 detailed elements of self-initiated learning ability and learning satisfaction. As a result of analyses, first, it turned out that, among detailed elements of self -initiated learning ability, relatively high scores were showed in basic self management ability, grasp of resources for learning, attribution of efforts to results, and selection of learning strategies. Second, in correlation between self-initiated learning ability detailed elements and learning satisfaction and technical statistical analyses, the score of the two elements: learning goal setting and continuance of learning execution is low, so that it is necessary to note the two elements. Third, as to self-initiated learning ability, the average of female students is high and in learning satisfaction, the average of male students was high. Fourth, it was found that the first-class students showed significantly high learning satisfaction compared with the second-class students. Fourth it turned out that, regarding a difference, both of self-initiated learning ability and learning satisfaction were dismissed and thus there is no difference. Fifth, as to the effects of self-initiated learning ability on learning satisfaction, both of a corelation analysis and a regression analysis showed significant results. Accordingly, self-initiated learning ability in online class has a very significant effect on learning satisfaction.

• 한국측량학회:학술대회논문집
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• 한국측량학회 2004년도 춘계학술발표회논문집
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• pp.245-250
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• 2004

The classification of the satellite images is basic part in Remote sensing. In classification of the satellite images, class separability feature is very effective accuracy of the images classified. For improving classification accuracy, It is necessary to study classification methode than analysis of class separability feature deciding classification probability. In this study, IKONOS, SPOT 5, Landsat TM, were resampled to sizes 1m grid. Above images were calculated the class separability prior to the step for classification of pixels. The results of the study were valued necessary process in geometric information building. This study help to improve accuracy of classification as feature of class separability in the class through optimizing previous classification steps.