• 분석과학
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• 제29권6호
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• pp.283-292
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• 2016

범죄현장조사에 사용되는 인체에 유해할 수 있는 일반분말에 대한 대체수단으로 천연분말(오징어 먹물분말, 청대분말, 쌀분말)을 이용하여 비 다공성표면(유리, 플라스틱, 타일)상의 잠재지문을 현출(가시화)하였다. 현출된 잠재지문을 Automatic Fingerprint Identification System (AFIS)으로 분석한 특징점의 수를 흑색분말을 사용한 결과 특징점 수와 비교하였으며 또한 객관적이고 계량적인 평가방법의 개발을 위하여 각 분말로 가시화된 지문의 이미지를 농도계 이미지분석(densitometric image analysis)을 이용한 결과 값인 융선 피크의 면적값을 비교하였다. 천연분말들의 현출효과는 표면에 따라 다양하게 나타났다. 일반적으로 오징어 먹물분말은 대부분의 표면에서 좋은 현출을 보였으며 청대분말은 타일표면에서 그리고 쌀분말은 유리표면에서 최고의 현출을 보였다. 그러나 플라스틱 표면은 천연분말에 의한 지문현출이 가장 어려운 표면이었다. Field Emission Scanning Electron Microscope (SEM)를 이용한 이미지 분석에서 융선에 적절한 흡착력을 가지는 조건으로 천연분말 입자의 크기와 형태가 중요한 인자임을 확인할 수 있었다. 비록 기술적인 어려움으로 특징점의 수와 융선 피크의 면적값과의 상관관계를 볼 수는 없었으나 공평하고 객관적인 지문의 평가방법으로 기준 이미지의 사용을 통한 이미지 보정을 통하여 가능하리라고 사료된다. 저가의 저독성 천연분말은 추가적인 실험을 통하여 적절한 잠재지문 현출제로서의 가능성을 보일 것으로 사료된다.

• 국제초고층학회논문집
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• 제12권1호
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• pp.63-74
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• 2023

Large-capacity public transportation systems, represented by urban metro lines, are the key to alleviating the significant increase in urbanization and motorization in China. But to improve the agglomeration effect of metro stations in a more accurate and targeted way requires scientific evaluation and classification of the surrounding areas of metro stations. As spatial and functional design are the core factors for urban renewal design, this study took Beijing as an example, using multi-source data to evaluate the morphology and functional composition surrounding areas of metro stations, and the Boston Consulting Group (BCG) matrix was used to classify and characterize each type of surrounding areas from morphological-functional dimensions. It shows a negative correlation of the mix-use index with the floor area ratio, and only about 20% of the areas achieve the ideal situation of high construction intensity with high mix-use diversity. Hoping to provide a reference for city managers and designers in dealing with the surrounding metro stations with different construction intensities in a more precise way.

• 한국과학교육학회지
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• 제15권2호
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• pp.133-148
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• 1995

This study has been performed in order to achieve three objectives. They are as follows: To analyze, based on the research literatures, the nature of scientific inquiry ability and the characteristics of its constitutive elements. To identify inquiry skills and techniques essential to such areas as physics, chemistry, biology. and earth science. To develop instructional models and materials for enhancing inquiry ability on the part of high school students. It was found in the study that the scientific inquiry was interpreted in terms of different meanings according to the viewpoint of the person who are interested in the nature of science. The scientific inquiry has been viewed as the process of knowledge formation, scientific method, inquiry process or process skills depending on the epistemological, methodological, educational perspectives, respectively. It was also identified that certain kind of skills or techniques would be used for inquiry in only one specific area of the science. This study drew a conclusion based on the findings that the skills and techniques will effectively be learned when those are taught with specific knowledge in each area of the science. Reported in this paper are the materials developed, for fostering scienctific inquiry skills on the part of the high school students. The materials were developed, using two themes of a theoretical-abstract chemistry topic and a conceptual-concrete biology topic. Those materals were designed for an experiment and an observation, respectively.

• 한국초등과학교육학회지:초등과학교육
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• 제21권2호
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• pp.201-212
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• 2002

This paper aims to find out how did elementary students understand scientific units in science textbooks. The subjects were 191 students of the 6th grade from 7 elementary schools in 3 different areas, consisting of 70 from 4 village schools of, 64 from 2 town schools of Gyeongnam province, and 57 from one city school in Ulsan Metro City. A test was developed based on the analysis of scientific units in the science textbooks and teacher's manuals constructed according to the 6th and 7th National Science Curriculum. The understanding of elementary students' on the scientific units(Temperature, Length, Weight, Volume, Speed, Plane Angle) were surveyed. The result are as follows: Regarding the temperature unit, the students generally well understand why to measure and how to read temperature, but had some problem in recording it, in confusion with the plane angle sign. As for the length unit, they obtained high scores in understanding the purpose of measuring length as well as recording and reading it. Which indicates that they are well aware of and use the unit appropriately. With respect to the weight unit, they got high scores in reading and recording weight, which means most students have no problem using the unit. However, it was found that they do not understand why to use the plate balance scale. The volume unit was one in which the students got relatively lower scores. They do not perceive the object of using a scale cylinder and confuse it with a device of length measurement. The unit of speed is the most difficult one for children's of science to understand, presumably, because it is an derived unit from two basic units. It is also assumed that the students got the highest score in the plane angle unit because they studied the unit immediately before the test. From the children's understanding of science units above the teacher's understanding and teaching methods presumed to play a major role for children to understand and use the science units properly.

• 한국과학교육학회지
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• 제33권2호
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• pp.310-327
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• 2013

본 연구는 과학 창의성 지도를 위한 자료를 개발하고 특징을 구체적으로 소개하는 데 있다. 이를 위해 5개 영역에서 80여개의 자료를 개발하였다. 개발된 자료의 특징으로는, 다양한 영역을 포괄하였고, 활동마다 창의성 요소가 명시되어 있으며, 창의적 활동을 위해 사고하는 방법과 활동결과 예시를 제시한 데 있다. 또 개발된 자료는 목적과 상황에 따라 변형할 수 있도록 하였다. 또한 창의적인 활동을 위한 사고방법을 유형별로 구분하여 정리함으로서 다른 창의성 활동에서 도 활용할 수 있도록 하였다. 개발된 자료에 대해 교사들이 살펴본 후, 교사들은 창의성 자료로 적절하며, 앞으로 과학 창의성 지도에 활용하고자 하였으며, 장점과 단점, 그리고 보다 효과적으로 활용되기 위한 제언들을 제시하였다. 마지막으로 개발된 자료의 다양한 활용방안을 제안하였다.

• 한국과학교육학회지
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• 제24권3호
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• pp.556-564
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• 2004

본 연구는 중 고등학생의 창의력 및 과학적 사고력 향상을 위해 학습자 활동 중심으로 개발된 가설-연역적 실험 모듈이 과학고 학생들에게 효과적인지 알아보기 위해 수행되었다. 삼투압과 식물의 색소 분리와 관련된 5차시의 가설-연역적 실험 모듈의 효과를 알아보기 위하여 서울의 S 과학고 남 여 4개 반을 각각 46명씩 2개 학급으로 구성된 실험 집단 및 통제 집단으로 나누어서 수업을 하였다. 실험 집단은 삼투 현상 및 광합성 색소 분리와 관련된 가설-연역적 방식으로 구성된 생물 실험 모듈을 통해 학생 중심의 실험 수업을 하였고, 통제 집단은 개발된 실험 모듈과 같은 내용을 가지고 전통적인 방식의 실험 결과 확인 실험 수업을 수행하였다. 두 모듈을 적용하여 학생들의 창의력 및 과학적 사고력, 과학 탐구 능력 그리고 성취도의 향상 효과를 조사하였다. 연구 결과, 개발된 실험 모듈을 적용한 실험 수업은 기존의 전통적 실험 수업보다 학생들의 창의력, 과학적 사고력, 과학 탐구 능력에 유의미한 효과를 보였다. 이상과 같은 연구 결과는 삼투 현상과 광합성 색소 분리를 주제로 한 두 개의 생물 실험 모듈을 적용한 가설-연역적 방식의 수업이 전통적인 교과서 실험 방식인 확인식 실험 수업보다 학생들의 창의력 및 과학적 사고력을 높이는 데 효과가 있음을 의미한다.

• 한국과학교육학회지
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• 제38권2호
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• pp.249-257
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• 2018

본 연구의 목적은 중학생들이 유전과 관련된 과학적 현상에 대한 설명 글쓰기에서 드러나는 개념 성취 수준을 살펴보고, 과학적 현상을 설명하기 위해 어떠한 논변 구조와 정당화 방식을 사용하는지, 과학적 지식을 적절하게 정당화에 이용하고 있는지를 살펴보는 것이다. 이를 위해 서울시 소재 중학교 3학년 학생들 162명이 '유전과 진화'를 학습한 후에 크기와 모양이 같은 초록색 피망과 빨간색 피망이 같은 종류인지 다른 종류인지 다른 주장을 하는 경쟁 논변 중 하나를 선택하여 그 이유를 설명하도록 하였다. 연구 결과, 개념 성취 개념 성취 수준에서 전체 응답자(162명) 중 47%(77명)는 정답을, 53%(85명)는 오답을 제시하였다. 논변 수준을 살펴보면, 정답 학생들은 자료를 주장이나 결론에 연결하여 논거를 제시하는 수준인 수준 3(Constructing warrant)이 오답 학생들은 주장과 자료를 논리적으로 연결하지 않고 증거만 제시하는 수준인 수준 2(Providing evidence)가 가장 많았다. 정당화를 하면서 과학 지식(Scientific idea)의 사용을 학생들의 조사한 결과, 인과적 설명의 질을 결정할 수 있는 요소로 과학 지식을 사용한 학생 중 36%가 옳은 과학 지식(Correct scientific knowledge)을 사용하였으나, 나머지 학생들은 옳지 않은 과학 지식이나 특정되지 않은 과학 지식을 사용하였다. 이와 같은 연구 결과들은 인식적 실행인 과학적 현상을 설명하는 논변적 글쓰기를 장려하기 위해서 논변의 구조에 대한 영역 일반적인 지식의 교수 실행을 통해 관련된 특정 과학 지식을 적용하여 자신의 생각을 증거와 주장을 잘 연결할 수 있도록 훈련하는 것이 필요하다는 것을 강조한다.

• 한국물환경학회지
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• 제31권6호
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• pp.693-699
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• 2015

It has been known that torrential rainfall events have been occurring worldwide due to climate change. The accelerated soil erosion has caused negative impacts on water quality and ecosystem of receiving waterbodies. Since soil security issues have been arising in various areas of the world, intensive interests have been given to topsoil management in Korea. Thus in this study, Web GIS-based computing system of physical, chemical, and biological topsoil quality indices were developed. In this study, five soil quality maps at national scale and top soil erosion potential were prepared for evaluation of soil quality based on soil erosion potential. For this system, the open source Web GIS engine, OpenGeo, was used as core engine of the system. With this system, decision makers or related personnel in areas of soil erosion Best Management Practices (BMPs) would be able to find the most appropriate soil erosion BMPs based on soil erosion potential and soil quality at the area of interest. The Web GIS system would be efficiently used in decision making processes because of ease-of-use interface and scientific data used in this system. This Web GIS system would be efficiently used because this system could provide scientific knowledge to decision makers or stakeholders. Currently various BMP database are being built to be used as a decision support system in topsoil management and topsoil quality areas.

• Journal of Contemporary Eastern Asia
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• 제18권1호
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• pp.7-29
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• 2019

This study describes an approach for comparative bibliometric analysis of scientific publications related to (i) individual or several departments comprising a university, and (ii) broader integrated subject areas using multiple disciplinary schemes. It uses a custom dataset of scientific publications (ca. 15,000 articles and reviews, published during 2009-2013, and recorded in the Web of Science Core Collections) with author affiliations to the research departments, dedicated to science, technology, engineering, mathematics, and medicine (STEMM), of a comprehensive university. The dataset was subjected, at first, to the department level and discipline level analyses using the newly available KAKEN-L3 classification (based on MEXT/JSPS Grants-in-Aid system), hierarchical clustering, correspondence analysis to decipher the major departmental and disciplinary clusters, and visualization of the department-discipline relationships using two-dimensional stacked bar diagrams. The next step involved the creation of subsets covering integrated subject areas and a comparative analysis of departmental contributions to a specific area (medical, health and life science) using several disciplinary schemes: Essential Science Indicators (ESI) 22 research fields, SCOPUS 27 subject areas, OECD Frascati 38 subordinate research fields, and KAKEN-L3 66 subject categories. To illustrate the effective use of the science mapping techniques, the same subset for medical, health and life science area was subjected to network analyses for co-occurrences of keywords, bibliographic coupling of the publication sources, and co-citation of sources in the reference lists. The science mapping approach demonstrates the ways to extract information on the prolific research themes, the most frequently used journals for publishing research findings, and the knowledge base underlying the research activities covered by the publications concerned.

• 한국환경보건학회지
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• 제47권4호
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• pp.310-319
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• 2021

Background: Humidifier disinfectant exposure is an ongoing issue, and there is still considerable related controversy. Various approaches are needed to secure scientific evidence on the extent of the victims' damages and for the determination of appropriate compensation. Objectives: The purpose of this study was to assess the association between humidifier disinfectant (HD) use and academic achievement in Korean children. Methods: This study used data from the 8th Panel Study on Korean Children in 2015. For the final study, 1,598 cases were used. T-tests and multiple linear regression analyses were conducted to determine whether the use of humidifier disinfectant is a factor that affects academic ability. Results: Children in groups using humidifier disinfectant showed statistically significantly lower scores in all areas of language, including reading, speaking and writing, and statistically lower scores in all areas of mathematics, including counting, addition and subtraction. In the multiple regression analysis results, which control for the effects of various demographic/social variables, the use of humidifier disinfectants showed statistically significant beta coefficients (β: -0.357, p<0.001), negatively affecting children's language ability. As for the 'math' variable, which was created by combining counting, addition, and subtraction scores, the use of humidifier disinfectants as independent variables also showed statistically significant beta coefficients (β: -0.200, p<0.001), negatively affecting children's math ability. Conclusions: The results of the study showed that depending on whether or not humidifier disinfectants were used, there are differences in children's language abilities, such as reading, speaking, and writing, as well as in their mathematical abilities, such as counting, adding, and subtracting numbers. These findings are thought to serve as a scientific basis for extending the perspective from health effects to more diverse areas of demographic and social impact related to humidifier disinfectant damage and compensation.