• 제목/요약/키워드: Chronological changes

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몽골 북부 흡수굴호의 홀로세 동안의 고환경 변화 (Holocene paleoenvironmental changes in the Lake Khuvsgul, Northern Mongolia)

  • 어르헌셀렌게;카시와야;오치아이;크리워너거브;나카무라
    • 한국제4기학회지
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    • 제22권1호
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    • pp.28-36
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    • 2008
  • The present study has focused on the environmental changes and evidences for sedimentation in the Lake Khuvsgul catchment during the Holocene period, inferred from short core sediment (BO03) from the eastern shore of Borsog Bay, which were analyzed in order to review records of the Holocene climatic evolution and Holocene history in Northern Mongolia. For the purpose of reconstruction of natural phenomenon that occurred in the lake catchment system during the Holocene, physical and chemical properties including HCl-soluble material, biogenic silica, organic matter and grain size distribution of minerals in the core sediments have been analyzed in this study. The vertical variations in composition for these properties show distinctly that five lines of paleoenvironmental evidence occurred in the lake catchment during the Holocene. A modified age model resulting from AMS carbon dating for the BO03 core sediment shows timings of these environmental events at 9.5 Kyr BP, 8.0 Kyr BP, 5.6 Kyr BP and 3.2 Kyr BP, respectively. Paleoenvironmental changes in the Lake Khuvsgul catchment system during the Holocene highlight distinctive features of the hydrological regime and geomorphologic evolution in the lake catchment due to regional landscape and global climatic changes corresponding with the Holocene optimum and thermal optimum. In particular, the change of hydrologic regime based on the sedimentological evidence has been caused by not only overland flow due to melting water, but also base flow due to thick permafrost around Khuvsgul region.

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사서직무만족도 평가요인의 변화추이 분석 (An Analysis of Changes and Trends in Evaluation Criteria for Librarians' Job Satisfaction)

  • 도혜진;김현정
    • 한국비블리아학회지
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    • 제28권1호
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    • pp.229-252
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    • 2017
  • 국내에서 사서직무만족도 연구는 꾸준히 진행되어 왔다. 그러나 직무만족 평가지표 자체에 관한 연구는 거의 이루어지지 않았고, 대부분의 직무만족도 평가는 오래전에 개발된 국외의 지표를 사용하고 있기에 평가지표에 관한 연구가 반드시 필요한 시점이다. 본 연구는 사서 직무만족도에 대한 68편의 학위논문을 대상으로 최근으로부터 10년씩 기간을 구분하고 평가요인의 시대별 흐름과 관종별 차이를 분석하였다. 그 결과 시대별 흐름에는 평가요인의 변화가 있었으며 도서관 유형 간의 차이는 미미했다는 것을 확인하였다. 본 연구는 나아가 요인, 문항, 현재 모두 반영될 수 있는 세 가지 기준을 적용하여 12개의 평가요인과 39개의 설문문항으로 구성된 사서직무만족에 대한 표준평가지표를 제시하였다.

1960년$\sim$2007년 수도권 아파트단지의 공동생활공간 변화 과정 (A Study on the Changing Trends of Community Spaces in Apartment Complexes in the National Capital from 1960s to 2007)

  • 이남식;서귀숙
    • 한국주거학회논문집
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    • 제19권3호
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    • pp.95-104
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    • 2008
  • The purpose of this study is systematically to examine the changes that have taken place to the community spaces of apartment complexes in the national capital region of Korea. The methodology used in this study entails analyzing existing research and case studies carried out on this subject matter. Prior to these case studies, an existing study had been made of the chronological changes in policy, related laws and regulations in Korea since the 1960s. This case study presents the component ratio and systematized present situation of community spaces in twenty-two apartment complexes. An analysis of the researching process has revealed the following important factors related to the changes that have occurred in community spaces in apartment complexes. (1) Apartment complexes were originally developed in the 1960s to ease the housing shortage. Because the priority was to solve the housing shortage, community spaces were not widely considered or developed. (2) The standard of community spaces was established as mandatory by law in the 1970s, resulting in the emergence of various facilities that provided community spaces. (3) In the 1980s, various design competitions for apartment complexes were conducted as an attempt to improve residential environments. This process resulted in the development of new characteristic of subsidiary facilities. (4) During the period when housing problems were being addressed in the 1990s, the Community Service Center was added to the welfare facilities for residents. (5) Recently, during the 2000s, an improvement in residential environments has evolved due to the expansion of housing supply and economic growth. The quality of community spaces has therefore improved from the 1960s onward. This study revealed that policy and related laws regarding community space in Korea have been developing in a suitable direction and that the addition of various facilities to community spaces has improved the quality of living environments.

역사도시 경주의 경관정체성에 관한 연구 I -고대 신라시대 왕경 경주의 경관요소 특성 연구를 통한 경관정체성 규명을 중심으로- (A Study on identity of scape for Historical city, Gyeongju - With a characteristic of landscape elements of Gyeongju in the Silla period -)

  • 홍사철
    • 한국디지털건축인테리어학회논문집
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    • 제11권1호
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    • pp.43-51
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    • 2011
  • Thanks to the historic sites, the identity of historical landscape of Gyeongju is definitely recognized. When explaining, in other words, the identity of urban scape, we have to know the characteristics of landscape with the changes of the times. Therefore this study is tried to understand the urban scape form and meaning of the historic city Gyeongju, futhermore to find out the identity of urban scape, catching hold of the characteristics of landscape by periods. The research was proceeded through the classifying the concept of Urban form by periods and the basic ideology and adopting the representative landscape at that time with the literatures and maps in the Silla period. And then tried to find out the identity of landscape with the link between the concepts of the representative landscape and that of Urban form in chronological order. The results of this study is relativeness between city and natural environment, type of the Grid - Pattern on urban form, basic ideals were inspired by Buddhism.

구성놀이에서 드러나는 유아들의 과학적 사고과정 탐색 : 재미반의 사례를 중심으로 (An Exploration into the Process of Scientific Thinking on the part of Young Children as seen through Constructive Play : Focusing on the Cases of the Jaemi Class)

  • 백은영
    • 아동학회지
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    • 제36권3호
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    • pp.139-154
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    • 2015
  • The purpose of this study was to explore the process of scientific thinking as it is revealed through the cases of constructive play for young children. For this purpose, the researcher observed and interviewed six four-year-olds in the Jaemi Class while recording them with a camcorder during a free choice activity class in the morning from April 23 to June 25, 2012. The observations were analyzed in chronological order according to the changes of theories and structure as presented by the children themselves. The process of scientific thinking in constructive play for young children can be divided into presentation of naive theories, the abandonment of naive theories according to repetitive experiences and the discovery of inconsistency, the representation of alternative theories, and the abandonment of alternative theories according to repetitive experiences and the discovery of contradictions. On the basis of the results, constructive play has proved to serve a valuable educational function by inducing scientific thinking processes in children. On the basis of this finding, the researcher suggests the need to provide appropriate educational support to teachers.

20세기 그래픽 디자인의 미니멀 경향 (Minimal Graphics in Twentieth-Century Design)

  • 강현주
    • 디자인학연구
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    • 제16권3호
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    • pp.123-132
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    • 2003
  • 본 연구는 1990년대 후반 이후 다시 새롭게 부각되고 있는 그래픽 디자인에서의 미니멀한 경향을 디자인사적인 맥락에서 어떻게 평가할 것인가 하는 문제의식에서 출발하였다. 제1장 에서는 "적을수록 많다", "적을수록 지루하다", "나는 적음과 많음을 믿는다" 등의 세 개의 디자인 경구를 통해 20세기 디자인의 전개 과정과 그 주제들을 살펴보았고, 제2장에서는 그래픽 디자인에 나타난 미니멀한 디자인 경향과 그 특성들을 시기별로 고찰해보았다. 최근의 미니멀 그래픽스 경향은 그래픽 디자이너들이 20세기 후반의 사회적ㆍ문화적 기술적 변화들을 적극적으로 수용하면서 분야의 전문성과 정체성을 새롭게 재정의해 가는 과정에서 자연스럽기 등장한 것이다. 이제 디자인의 내용과 형식, 스타일, 작업논리와 학문적 체계의 구성 등에 대해 보다 심화되고 확장된 연구가 필요한 시점이라 생각된다.보다 심화되고 확장된 연구가 필요한 시점이라 생각된다.

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한국건축에서 장소성 개념의 변천과 의미구조에 대한 연구 - 1990년대 전후의 한국건축담론을 중심으로 - (A Study on the Diachronic and Synchronic Structure of the Concept of Place in Korean Architecture - Focused on the Korean Architectural Discourse during Around 1990s -)

  • 김인성
    • 한국실내디자인학회논문집
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    • 제24권1호
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    • pp.124-132
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    • 2015
  • This study investigated the complex meanings of the concept of place and their periodical changes in the Korean architectural discourse. For that, the study surveyed almost every articles in majour 3 Korean architectural magazines during around 1990s, when the Korean architects and theorists concerned the 'place' as an alternative of the modernists' 'space'. 60 selected articles were organized in a table in a chronological order together with their keywords and category codes. The 8 categories reflecting 8 issues of 'place' were suggested in the study after the analysis of selected articles' contents. The categories were structured by two axes which were 4-grade scale axis influences by C. Norberg-Schultz' approach, and 'architecture-human' axis following the 'structure-action' division by A. Giddens. After the analysis of the diachronic and synchronic tables, the study tried to establish a structure model of the concept of place in Korean architectural context, which consisted of architectural terms such as environment, social system, context, identity, landscape, community, Materiality, and residence. This final result could be useful for both architects and theorists who might try to apply the idea of 'place' without erstwhile confusion on their design or research by examining the detailed contents of the concept.

C57BL/6 마우스의 등에 시행한 자가 전층피부이식편을 이용한 색소침착 동물모델 (Animal Skin Pigmentation Model Using Full Thickness Skin Graft in C57BL/6 Mouse)

  • 이홍기;박종림;허은주;김석화
    • Archives of Plastic Surgery
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    • 제38권6호
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    • pp.725-732
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    • 2011
  • Purpose: Skin grafting is one of the most commonly used methods in reconstructive plastic surgery field, but complications such as color change, contracture or hypertrophy are common problems. However, pathophysiology of the color change after skin graft is not yet determined and no animal model is established. Methods: Full thickness skin grafts were performed on the dorsum of C57BL/6 mice. Serial chronological gross inspection for color change and pigmentation were examined. Melanin pigments were traced by Fontana-Masson staining and semi-quantitative analysis was performed. In addition, immunohistochemical staining of S-100, Micropthalmia related Transcription Factor (MITF) and Melan-A antibodies were also performed to observe melanocytes and their changes. Results: After skin graft, color change and pigment spots were observed in the graft. Fontana-Masson staining showed melanin pigments in the epidermal and dermal layers in all mice. Immunohistochemistry staining to S-100, MITF, Melan-A antibodies showed melanocytes at the basal layer of epidermis and dermis. Conclusion: In conclusion, we have established an animal model for skin pigmentation after skin graft. We believe this study may be useful in understanding of the behavior of melanocytes after skin graft.

가구디자인의 곡목기법 변천과 시대별 특징에 관한 연구 - 곡목 기법의 발전을 이끈 대표적 인물과 사례를 중심으로 - (A Study on the changes and chronological features of bentwood techniques of furniture design - Focus on the representative figures and examples that led the development of the bentwood technique -)

  • 강현대;김찬웅
    • 한국가구학회지
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    • 제25권1호
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    • pp.1-10
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    • 2014
  • The First bentwood chairs in the world, called "winsor chairs" were made by British craftsman in the 17th century. Since then, from the start of NO.14 using solid bentwood by 19th-century German Michael Thonet, furniture making techniques such as Bent knee, Y-leg, X-leg- were developed based on Llaminated bentwood made by Alvar Aalto of Finland in the 20th century. In the 20th century Charles Eames of the United States studied Molded plywood, using plywood to produce a variety of furniture and during the 17~20 century a variety of Bentwood were developed. Coming into the 21st century, American Matthias Pliessnig and Phil Seaton worked with past Bentwood designs, developing Bentwood further by adapting Bentwood's know-how and IT technology. Science and technology evolved and Reholz of Germany developed technology which can mold three-dimensional wood using a new matarial called 3D-veneer, In the past only plastic or metal could be moulded 3 dimensional but now beautiful wood grain patterns can be molded by utilizing this technology. Also this is comparable with the past two-dimensional molding technology. In this Sustainable Design techniauses era, Bentwood fused with IT technology has great potential as a high-tech and eco-friendly techniche.

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The Health Examinees (HEXA) Study: Rationale, Study Design and Baseline Characteristics

  • Health Examinees (HEXA) Study Group
    • Asian Pacific Journal of Cancer Prevention
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    • 제16권4호
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    • pp.1591-1597
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    • 2015
  • Background: Korea has experienced rapid economic development in a very short period of time. A mixture of traditional and modern risk factors coexists and the rapid change in non-genetic factors interacts with genetic constituents. With consideration of these unique aspects of Korean society, a large-scale genomic cohort study-the Health Examinees (HEXA) Study-has been conducted to investigate epidemiologic characteristics, genomic features, and gene-environment interactions of major chronic diseases including cancer in the Korean population. Materials and Methods: Following a standardized study protocol, the subjects were prospectively recruited from 38 health examination centers and training hospitals throughout the country. An interview-based questionnaire survey was conducted to collect information on socio-demographic characteristics, medical history, medication usage, family history, lifestyle factors, diet, physical activity, and reproductive factors for women. Various biological specimens (i.e., plasma, serum, buffy coat, blood cells, genomic DNA, and urine) were collected for biorepository according to the standardized protocol. Skilled medical staff also performed physical examinations. Results: Between 2004 and 2013, a total of 167,169 subjects aged 40-69 years were recruited for the HEXA study. Participants are being followed up utilizing active and passive methods. The first wave of active follow-up began in 2012 and it will be continued until 2015. The principal purpose of passive follow-up is based on data linkages with the National Death Certificate, the National Cancer Registry, and the National Health Insurance Claim data. Conclusions: The HEXA study will render an opportunity to investigate biomarkers of early health index and the chronological changes associated with chronic diseases.