• 자원환경지질
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• 제24권2호
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• pp.83-96
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• 1991

Haenam pyrophyllite deposit occurred in the rhyolitic tuff of late Cretaceous age is located in the northern part of Haenam-gun, Jeonranam-do. The ore of the Haenam deposit is predominantly composed of pyrophyllite and illite accompanying such clay minerals as kaolinite, chlorite, and smectite. Pyrophyllite ore at the center of altered mass is often associated with kaolin minerals and high temperature minerals such as corundum, andalusite, and diaspore. On the basis of mineral assemblage the Haenam deposit can be devided into three alteration zones from the center to the margin of the deposit; the pyrophyllite zone, kaolinite zone, and illite zone. All alteration zones are associated with appreciable amounts of chalcedonic quartz. Those mineral assemblages indicate that hydrothermal solution which produced the Haenam deposit is strongly acidic solution with high silica and hydrogen activity and low $SO_4{^{2-}}$ activity. Discriminant analysis shows that $Na_2O$, $K_2O$, and $Al_2O$, of major elements are discriminant elements which classify alteration zones, while in case of trace elements Cr, Ni, and Sr turned out to be discriminant elements in this deposit. According to the mineral assemblage and illite geothermometry, pyrophyllite ore is considered to have been formed at about $240-290^{\circ}C$. K-Ar isotopic age for illite from this deposit indicates that it was formed at much the same age of later stage volcanics in the area, suggesting that the hydrothermal alteration of these deposits is associated with later volcanism of the area.

• 대한수학교육학회지:수학교육학연구
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• 제13권3호
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• pp.351-364
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• 2003

Clairaut의 <기하학 원론>은 Euclid의 <원론>의 논리-연역적인 전개 방식에 대항하여 역사발생적 원리에 입각하여 쓰여진 최초의 기하 교재이다. 본 논문은 <기하학 원론>을 고찰함으로써 Clairaut가 생각한 역사발생적 원리를 파악하고, 아울러 학교 수학에의 적용 방안을 탐색하는 것을 목표로 한다. 이를 위해, <기하학 원론>의 내용 전개 방식으로부터 저자의 기본 아이디어에서 비롯된 다섯 가지 특징을 추출한다. 필요에 의한 기하의 출현, 실생활 문제 해결을 통한 접근, 초보자에게 자연스런 방법으로서 직관적 요소와 논리적 요소의 조화, 기본 원리의 파악, 활동적 원리의 구현. 이러한 특징은 Clairaut의 역사발생적 원리를 구체적으로 드러내며, 기하 영역의 교재 구성 및 교수 실제를 위한 시사점을 제공한다. 그리고, 학교 기하에서 매우 유용한 두 개의 정리를 예로 들어 그의 역사발생적 원리를 재음미한다.

• 한국수학교육학회지시리즈C:초등수학교육
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• 제27권1호
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• pp.57-74
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• 2024

본 연구는 2020년 발행된 일본 초등학교 수학 교과서 2종의 프로그래밍 교육 관련 특화 차시를 지도 시기 및 주제, 지도 내용의 수학적 구성, 지도 맥락 및 활동 구성의 측면에서 분석하였다. 프로그래밍 교육 관련 특화 차시의 경우, 교과서에 따라 1~6학년 모두에 제시되어 있거나 5~6학년에 집중적으로 제시되어 있었다. 주제는 로봇 이동 시키기, 한붓그리기, 정다각형 그리기, 수 정렬하기 등으로 다양했다. 내용 영역 측면에서는 도형과 측정 영역이 가장 많이 제시되었으며, 수학적 요소로는 순서, 논리, 알고리즘 등의 요소가 가장 많이 구현되었다. 실제 프로그래밍을 구현한 디지털 콘텐츠에는 교과서에 제시된 내용보다 많은 내용들이 포함되어 있었으며, 학생들이 스스로 할 수 있도록 단계별로 매우 상세하게 제시되어 있었다. 마지막으로 코드 블록의 경우 동작, 연산, 선택 블록 등을 많이 사용되었다. 이러한 연구 결과를 토대로 우리나라 초등 수학 교육에서의 프로그래밍 교육에 대한 시사점을 제공하고자 한다.

• 한국실내디자인학회논문집
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• 제28호
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• pp.140-148
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• 2001

The purpose of this thesis is to provide basic information of efficient flow line arrangement, which results from examining the factors of route choice with a focus on the store' space elements and pedestrian activity patterns in the outlets. The route tracking is applied to grasp pedestrian activity patterns, therefore, a concrete analysis into influential factors of the space structure arrangement and forms on route choice. The route tracking is a means to understand pedestrian activity patterns by establishing an unrecognizable space and examining every route in the investigating area for pedestrian activity pattern research. Three sample stores have different systems in the ground plan structures, the escalator location and the directions. The analysis focuses on the booth arrangement and shopping patterns. In conclusion, route choice of the customers and the structure of the space are quite closely related and affect the quality of shopping. This can suggest evidence for the need of the space structure to meet the pedestrian activity patterns.

• 한국생물물리학회:학술대회논문집
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• 한국생물물리학회 2001년도 학술 발표회 진행표 및 논문초록
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• pp.29-29
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• 2001

Leukocytes are important elements in the host defense against microbial infections. A variety of antimicrobial peptides named as the cathelicidin family have been identified from leukocytes. PMAP-23 derived from porcine myeloid cells is an antimicrobial peptide belong to the cathelicidin family. PMAP-23 was reported to have potent growth inhibition activity against bacterial and tumor cells with no hemolytic activity.(omitted)

• 한국디지털건축인테리어학회논문집
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• 제4권1호
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• pp.10-16
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• 2004

Territory is determined by physical elements that provide the occupants an obvious boundary in a space. The creation of boundary is a interpersonal process by which a person or group regulates interactions with others. The perception of territory needs boundary regulations that mean the composition of horizontal and vertical elements in architectural space. The perception of territory can be defined as perceptual reaction considering not only visual perception on the physical elements in the architectural space and also various kinds of social activity in architectural environment. To achiever territory in architectural space, visible and invisible boundary regulation should be need. It means that territorial boundary regulation needs visual and audial boundary regulation as well as spatial boundary regulation.

• Toxicological Research
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• 제21권4호
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• pp.333-338
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• 2005

Many of thyroid hormones disrupting chemicals induce effects via interaction with thyroid hormone and retinoic acid receptors and responsive elements intrinsic in target cells. We studied thyroid hormones disrupting effects of food additives and contaminants including BHA, BHT, ethoxyquin, propionic acid, sorbic acid, benzoic acid, CPM, aflatoxin B1, cadmium chloride, genistein, TCDD, PCBs and TDBE in recombinant HeLa cells containing plasmid construct for thyroxin responsive elements. The limit of response of the recombinant cells to T3 and T4 was $1\times10^{-12}\;M$. BHA. genistein, cadmium and TBDE were interacted with thyroid receptors with dose-responsive pattern. In addition, BHA, BHT, ethoxyquin, propionic acid, benzoic acid, sorbic acid, and TBDE showed synergism while cadmium chloride antagonism for T3-induced activity. This study elucidates that recombinant HeLa cell is sensitive and high-throughput system for the detection of chemicals that induce thyroid hormonal disruption via thyroid hormone receptors and responsive elements. Also this study raised suspect of BHA. BHT, ethoxyquin, propionic acid, benzoic acid, sorbic acid, TBDE, genisteine and cadmium chloride as thyroid hormonal system disruptors.

• 수산해양교육연구
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• 제20권2호
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• pp.236-248
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• 2008

This study has explored the elements of e-teaching portfolio for enhancing teaching expertise in higher education. This study is carried out through the literature review and expert's focus group interview. As the result of this study, seven elements of e-teaching portfolio for enhancing teaching expertise in higher education have been found. First, 'personal background' include curriculum vitae, course responsibility, and other educational activities. Second, 'teaching philosophy' include the principals on teaching and learning, statements of teaching philosophy. Third, 'learning environment' include the characteristics of students, the previous learning contents, and physical environment. Forth, 'course contents and methods' include teaching strategies and instructional materials, Fifth, 'instructional evaluation' includes the principals of evaluation and the examples of learning outcomes. Sixth, 'endeavor for improvement of instruction' include evidence of activity for teaching improvement and instruction feedback from peer and students. And e-teaching portfolio also includes research career and awards history element.

• Carbon letters
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• 제10권2호
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• pp.123-130
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• 2009

Multi-elements doped $TiO_2$ was prepared as a new photocatalyst in order to decrease the band gap of $TiO_2$ by sol-gel process which can provide the large active sites of $TiO_2$. Multi-elements were doped by using a single precursor, tetraethylammonium tetrafluoroborate (TEATFB). By the benefit of large specific surface area of $TiO_2$ prepared by sol-gel process, catalysts showed initial fast removal of dye. The photoactivity showed that the doped catalysts significantly promote the light reactivity than undoped $TiO_2$. The commendable photoactivity of prepared catalysts is predominantly attributable to the doping of anions which may reduce the band gap.

• 한국노년학
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• 제38권1호
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• pp.65-82
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• 2018

본 연구는 노인의 신체건강을 주제로 수행된 다양한 기공프로그램에 대해 메타분석을 사용하여 효과크기를 통계적으로 요약해보고자 하였다. 2016년까지 국내에서 보고된 학술지 논문 23편과 학위 논문 11편 총 34편을 선정하여 프로그램과 프로그램의 유형, 측정변수 및 활동요소에 대한 효과크기를 확인한 결과, 첫째, 전체평균 효과크기는 .748(p<.001)로써 중간크기의 효과가 나타났다. 가장 효과크기가 큰 프로그램은 타이치로 .836 (p<.001)이었으며, 측정변수는 체력이 .806(p<.001)으로 가장 높게 나타났다. 집단의 성별에서는 남성만으로 구성된 집단이 2.388 (p<.001)로 높았고, 집단의 질병유무에 따른 효과크기는 정상집단이 .804(p<.001)로 높게 나타났다, 둘째, 활동요소 중 집단크기는 31~60명이 .873(p<.001), 총회기수는 31~40회가 .829(p<.001)로 높게 나타났다. 주회기수는 5회가 .918(p<.001)로 가장 높았고, 활동시간에 따른 효과크기는 50분이 1.391(p<.001)로 높은 효과크기를 보였다. 상기와 같이 기공프로그램은 노인의 신체건강에 중간크기의 효과가 나타났으며, 향후 기공프로그램 구성 시 집단크기 31~60명, 총회기수 31~40회, 주회기수 5회, 활동시간은 50분으로 제안하고자 한다.