• Title/Summary/Keyword: Major Elements

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Geochemical Relationship Between Stream Sediments and Regional Geology of the Upstream for the Hahn River Drainage Basin, Korea. (한강상류 하상퇴적물과 인근유역육상지질과의 지화학적 상관관계)

  • 이연희;지정만;오재경
    • Economic and Environmental Geology
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    • v.37 no.2
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    • pp.153-171
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    • 2004
  • This study was carried out to define the geochemical and mineralogical relationship between stream sediments and regional geology on upstream of Hahn river area. Geochemical characteristic including for major elements, trace elements and rare earth elements of the South and North Hahn river bed sediments are similar to those of acid igneous rocks which are distributed around both Hahn river basin. The chemical variation of major elements against SiO$_2$ and trace elements contents between South and North Hahn river bed sediments doesn't show the difference. REE patterns of both area show a distinct negative Eu anomaly, but total contents of rare earth elements are higher in North Hahn river sediments than South Hahn river sediments. The heavy minerals in the river bed sediments in this study area are identified as tremolite-actinolite, hematiteㆍmagnetite, common hornblende, ilmenite, garnet, epidote, rutile and sphene. In conclusion, it is elucidated that South and North Hahn river bed sediments are being originated from igneous rocks or metamorphic rocks which contains medium-high grade metamorphic minerals and components of originated from sedimentary rocks those of politic or calcareous rocks are eroded away as solution or suspended load.

Chemical Speciations of Elements in the Fe-Mn Crusts by Sequential Extraction (단계별 추출법을 이용한 망간각 구성 원소의 존재 형태)

  • Kim, Jong-Uk;Moon, Jai-Woon;Chi, Sang-Bum;Ko, Young-Tak;Lee, Hyun-Bok
    • Ocean and Polar Research
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    • v.26 no.2
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    • pp.231-243
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    • 2004
  • Sequential extraction was carried out on twenty two subsamples of three ferromanganese crusts from three seamounts (Lemkein, Lomilik, and Litakpooki) near the Marshall Islands in the western Pacific. The extraction was designed to fractionate Fe-Mn crust forming elements into low defined groups: (1) exchangeable and carbornate, (2) Mn-oxide, (3) Fe-oxyhyd.oxide, and (4) residual fraction. X-ray diffraction result shows that target material were well removed by each extraction step except for CFA in phosphatized crusts generation. According to chemical analysis of each leachate, most of elements in the Fe-Mn crusts are bound with two major phases. Mn, Ba, Co, Ni, Zn, (Fe, Sr, Cu, and V) are strongly bounded with Mn-oxide $({\delta}-MnO_2)$ phase, whereas Fe, Ti, Zr, Mo, Pb, Al, Cu,(V, P, and Zn) show chemical affinity with Fe-oxyhydroxide phase. This result indicates that significant amount of Al, Ti, and Zr can not be explained by detrital origin. Ca, Mg, K, and Sr mainly occur as exchangeable elements and/or carbonate phase. Outermost layer 1 and inner layer 2 which are both young crusts generations are similar in chemical speciations of elements. However, some of Fe-oxyhydroxide bounded elements (Pb, Y, Mo, Ba, Al, and V) in phosphatized innermost layer 3 are released during phosphatization and incorporated into phosphate (Pb, Y, Mo, and Ba) or Mn-oxide phase (Al and V). Our sequential extraction results reveal that chemical speciations of elements in the hydrogenetic crusts are more or less different from interelemental relationship calculated by statistical method based on bulk chemistry.

A Study on the Figuration of Korean Traditional Pattern Images (한국 전통문양의 이미지 형상화 소고)

  • 장수경
    • Journal of the Korean Society of Clothing and Textiles
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    • v.22 no.8
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    • pp.1001-1010
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    • 1998
  • The purpose of this study was to investigate the images and characteristic formative elements of Korean traditional patterns. The Korean pattern image could be interpreted into visual elements of design based on the images, the characteristic formative elements of Korean traditional patterns, and their relationships. Fourteen patterns selected from 5 groups of Korean patterns were used as stimuli. An image evaluation using a 2-point sementica scale of 19 bipolar adjectives, and an impression evaluation of which results were presented by visual drawing using lines and shapes were carried out. The data were analyzed by correspondence analysis and cluster analysis. The major findings are as follows; 1. Fourteen patterns and 19 adjectives were marked on a perception map composed of two (x and y-) axes. The bipoles of x- and y axes were soft-hard and splendid-artless, respectively. 2. Four clusters semerged to account for the dimensional sturucture of 14 patterns and 19 adjectives. These were splendid image, soft image, individualistic image, and sophisticated image. However there was no pattern which belonged to the cluster, sophisticated image. The Korean pattern image was founded to be better related to the kind of patterns than the type of patterns. 3. The characteristic formative elements obtained from the impression test were contour of motif, repeated line or shape, various curved lines, and decorative elements. 4. The splendid image was related to Bongwhang patterns and detailed line and complexity. The individualistic image was related to the abstractive form of Bongwhang pattern and the decorative form of Cloud pattern both of which have the characteristics of point-symmetry and abstraction, and Turtle-back pattern. In this case, the related charac-teristic formative element was identified to be repeated lines. The soft image was related to Moran, Cloud, and Taegeuk patterns. The related characteristic elements were various types of curved lines, decorative elements, and rounded contours.

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Green Design Principles and Techniques of Korean Folk Houses in Rural Area (전통농촌주택의 환경친화성에 관한 연구)

  • Han, Dong-wook
    • Journal of the Korean Institute of Rural Architecture
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    • v.1 no.2
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    • pp.15-27
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    • 1999
  • The Korean folk house, especially in rural area, has created the comfortable indoor environment with passive control of outdoor climate as environmental architecture. This study aims to identify the peculiar elements of sustainable architecture in folk houses in rural areas of Cheju Island and Ullŭng Island through the field experiments. The elements of environmental control of folk houses in both islands could be developed as the design elements of modern rural architecture. This effort can play major role to find the green design principles and techniques of environmental control of the building which have been neglected in the design of modern architecture.

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Acculturative Stresses and Adjustment elements of Chinese students' studying in Korea (중국인 유학생의 대학생활문화에서의 스트레스와 적응)

  • Lim, Choon-Hee
    • Korean Journal of Human Ecology
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    • v.18 no.1
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    • pp.93-112
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    • 2009
  • The purpose of this study is to identify stresses and adjustment elements of Chinese students in Korea. The data analysis was conducted by qualitative method based on interviews with sixteen Chinese students as a focus group by the help of two interpreters. The results were as follows: first, stresses of Chinese students were from 'cultural difference', 'language', and 'financial', 'educational' and 'psychological stress', and 'university culture in Korea'. Those categories were divided into several sub categories. Second, ten helpful elements Chinese students could adapt themselves to Korean university life were such as 'Help of Korean professor and friends', 'Chinese friends' help', 'English-oriented lecture', 'Cultural affinity to Korea', 'Fluency in Korean language', 'Integration to Korean culture', 'Pride in Chinese culture', 'Individual effort', 'Satisfaction with educational environment', 'Perception of self-growth'.

A Study on the Execution Plan Elements for Revitalizing Public Design - Focused on the public design in local city and rural areas - (공공디자인 활성화를 위한 실행계획 요소에 관한 연구 -지방도시 및 그 배후지역의 공공디자인 계획을 중심으로-)

  • Lee, Gwang-Young
    • Journal of the Korean Institute of Rural Architecture
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    • v.13 no.4
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    • pp.67-74
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    • 2011
  • In modern society, the competition between cities than the competition between countries has been important in general. This kind of a new paradigm has spread worldwide. As a result, public design, naturally, have emreged one of the major trends to get the competitive of city. A lot of public design studies and case study have been published, especially in the city area. But there is not any kind of result public study in local and rural areas. So, for the purpose of revitalizing public design, this study is to propose the public design execution plan and execution plan elements that give the competitiveness of local city and rural areas.

Geochemical investigation of stream sediment and water of the Anyang river: Environmental implication (안양천 하천수 및 퇴적물의 지구화학 예비조사와 환경적 의미)

  • 이상훈;문지원
    • Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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    • 1998.11a
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    • pp.151-155
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    • 1998
  • The Anyang river drains a highly polluted industrial area and enters the lower part of Han river. In this preliminary study for the comprehensive understanding of geochemical behaviour of elements in the stream sediments and its implications on the river chemistry and ecology, major and trace elements in stream sediments, suspended solids and stream water were analysed to look into elemental enrichments and elemental behaviour with distance from upper part of the stream. Chemical analyses of the stream sediments show enrichements of heavy metals including Cr, Zn, Ni, Co between 10 to 100 times. Other trace elements, Cd, Pb and As are also enriched between several to 10 times, based on relative ratio with Al in fresh rock. Chemical analyses of the sediments, suspended solids and water show indications of anthroporgenic impact for the heavy metal accumulation. It was nortworth Hg is detected between 2 and 4 ppb in the water.

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RepWeb: A Web-Based Search Tool for Repeat-Related Literatures

  • Woo, Tae-Ha;Kim, Young-Uk;Kwon, Je-Keun;Seo, Jung-Min
    • Genomics & Informatics
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    • v.5 no.2
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    • pp.88-91
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    • 2007
  • Repetitive sequences such as SINE, LINE, and LTR elements form a major part of eukaryotic genomes. A literature search tool that summarizes the information contained within repeat elements would provide biologists in the field of genomics with a useful tool for analyzing genomic sequence features. We developed a java program designed to make literature access easier by using two search engines simultaneously. RepWeb is a web-based search system that provides a user friendly interface for searching the reference data and journals for information related to repeat elements by using the search engines, Google Scholar and PubMed, simultaneously. It provides an interface that displays the repeat element- related biological information, and includes useful functions such as the production of a repeat tree, clickable links to PubMed and Google Scholar, exporting, and sorting a field into date, author, journal and title.

A Study on the Inference of Product Design Elements by Fuzzy Decision Making Model (퍼지 의사결정 모델에 의한 감성제품 디자인 요소의 추론에 관한 연구)

  • Yang, Seon-Mo;Lee, Sun-Yo;An, Beom-Jun
    • Journal of the Ergonomics Society of Korea
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    • v.17 no.1
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    • pp.37-46
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    • 1998
  • A human sensibility ergonomics design supporting system was applied to the product development for the customer's satisfaction based on ergonomics technology. The system is composed of three major subsystems such as customer's sensibility analysis, inference mechanism, and presentation technology. The main approaches of the system are to analyze customer's sensibilities and to translate them into product design elements. The purpose of this paper is to develop a design supporting system in which the relationship between customer's sensibility and product design elements is reasoned by a MADM(Multi-Attribute Decision Making) fuzzy model. In this model, three variables such as multiple correlation coefficients, partial correlation coefficients, and category scores were used in reasoning process. The weighted value of the words were also considered in fuzzy decision process. As a case study, the design supporting system with the MADM fuzzy model was applied to the personnel computer design.

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Applications of MLS(Moving Least Sqrare)-based Finite Elements for Mechanics Problems Involving Interfaces and Discontinuities (경계 및 불연속의 해결을 위한 이동최소제곱 기반 유한요소의 적용)

  • Lim Jae-Hyuk;Im Se-Young;Cho Young-Sam
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 2006.04a
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    • pp.567-574
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    • 2006
  • We present applications of MLS-based finite elements, which enable us to easily treat highly complex nonmatching finite element meshes and discontinuities. The shape functions of MLS-based finite element can be easily generated with the aid of Moving Least Square approximation on the parental domain. The major advantage includes that the position of element nodes as well as the number of the element nodes can be conveniently adjusted according to the nature of the problems under consideration, so that finite-element mesh is straightforwardly adapted to evolving discontinuities and. interfaces. Furthermore, we show that the present MLS-based finite elements are efficiently applied for elastic-plastic deformations, wherein the implicit constraint of incompressibility should be properly handled.

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