• Journal of Educational Research in Mathematics
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• v.19 no.1
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• pp.99-121
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• 2009

This study analyzed the difficulty trend of item which are common with TIMSS 1999, 2003, 2007 and are released since TIMSS 2007. The results show that the 7th curriculum has positive effects on the students' achievement in the domain such as spatial sense of rotation, ratio proportion percent, pattern, calculation of decimal numbers, concept of angle, area of triangle, and qualitative approach to graph. And the results leaved the consideration for the process of scoring, teaching method of statistical probability concept, and making table as a problem solving method.

• Korean Journal of Remote Sensing
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• v.11 no.3
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• pp.71-81
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• 1995

The purpose of this research were to find ways to detect ecotone between the Mt. Pukhansan National Park and adjacent urban residential areas, to measure the width and size of ecotone around the park, and to investigate temporal change of ecotone around the Park. Normalized Difference Vegetation Index(NDVI) derived from TM data (May of 1985, 1987, and 1993) and the analytical capabilities of GIS were used to investigate the impacts of human activities inside of and outside of the boundary of the park. Major findings of the study can be summarized as follows: First, ecotone around the boundary of the national park could be identified from NDVI-distance curves derived by a series of buffering operations with a GIS. Second, average width of ecotone around the park was nealy doubled during 1985-1993 period. Third, NDVI vaules of the park were about 14 percent higher than those of surrounding areas. Finally, it seems that the expansion of the ecotone of the park is related to heavy trampling of visitors and various types of environmental pollution of the adjacent urban areas.

• Spatial Information Research
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• v.3 no.2
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• pp.91-102
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• 1995

The purposes of this paper are to find ways to detect ecotone between two eco'||'&'||'not;systems, measure the width and size of ecotone around the Mt. Pukhansan National Park, and investigate environmental impacts, if any, on the forest ecosystem of the park by human activities. Normalized Difference Vegetation Index(NDVI) derived from TM data and the ana'||'&'||'not;lytical capabilities of GIS are used to investigate characteristics of the ecotone, or the impact zone, of the park. Major findings of the study can be summarized as follows: First, it was found that ecotone of the park could be identified from NDVI -distance curves deri"ed by a series of buffering op'||'&'||'not;erations. Second, NDVIs of all three years of the national park are about 14 percent higher than surrounding areas. Third, width of ecotone were found to be closely related to phenology, adjacent land use, environmental degradation, etc. Third, ecotone of the study area was nearly douvled during 1985-1993 period, which might be caused by heavy trampling of visitors. Thus it can be concluded that further studies are needed to find exact causes of the deterioration of plant communities of the ecotone of the park.

• Korean Security Journal
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• no.45
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• pp.191-220
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• 2015

The purpose of this study is to analysis on status and trends of supply & demand and need of job level of security manpower from recognizing need for studies on supply and demand status of security manpower. The results were as follows. First, the shortage percentage of total security manpower was 1.2% ~ 1.6% from the first half of 2009 to the first half of 2015 as the result of analyzing status and trends of supply & demand of security manpower. Second, the need of job level of total security manpower was 785 ~ 2,557 people at the job level 1 from the second half of 2009 from the first half of 2013 as the result of analyzing status and trends of need of job level of security manpower. So, we should have interests such as (1) positivity of security manpower from trends and prediction of supply & demand of manpower, (2) Ensuring professionalism of security manpower considering the job level, (3) training of security manpower utilizing national competency standards(NCS), etc.

• Journal of the Korean Society for information Management
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• v.32 no.1
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• pp.171-204
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• 2015

The objectives of this study are to examine changes in research on library marketing promotion from its introduction to the present using domestic journals carrying research papers on library marketing, to forecast research trends in the future, and to provide basic information for supporting future studies on subjects related to library marketing. There were a total of 3,951 papers published through the journals in the area of library and information science including 'The Journal of the Korean Society for Library and Information Science', 'The Journal of the Korea Biblia Society for Library and Information Science', 'The Journal of the Korean Library and Information Science Society', and 'The Journal of the Korean Society for Information Management' from their first issues to the present. These papers were searched using selected keywords, and after redundant papers and those not related to library marketing were excluded, 359 papers were sampled for this study and analyzed from different aspects. Findings derived from this study, with regard to trends in research paper publishing by year, with regard to trends in research paper publishing by institution, with regard to trends in research paper publishing by author, with regard to trends in research paper publishing by area, and with regard to trends in research paper publishing by library type.

• Annual Conference of KIPS
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• 2019.10a
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• pp.752-753
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• 2019

최근 인터넷·정보 통신 기술이 크게 발달하면서 기술 발명의 권리 보장을 위한 특허 발명 수 또한 급격히 증가하고 있다. 또한, 특허 문헌에는 최신 기술 및 요소 기술들이 포함되어 있기 때문에 발명된 기술들의 분석을 통해 기술 가치 평가, 기술 분야의 동향 파악 및 기술 발전의 추이를 예측할 수 있다. 따라서 본 연구에서는 시계열 분석 도구를 이용하여 최근 20년 동안의 특허 발명 추이를 분석하여 특정 기술 도메인에 대한 추이 분석 사례를 보인다.

• 전기의세계
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• v.40 no.1
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• pp.37-44
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• 1991

변압기의 발전은 송전계통의 변화추이와 밀접한 관계를 갖으므로, 본 논문에서는 송전계통 전압의 변화추이, 국내 변압기의 개발역사, 변압기 정격전압 및 용량 현황, 변압기의 기술동향, 2000년대를 대비한 변압기 기술 연구과제에 대해 서술키로 하겠다.

• Proceedings of the Korean Information Science Society Conference
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• 2002.04a
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• pp.694-696
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• 2002

본 연구에서는 패트리 넷에서의 교착 상태 확인을 추이적 행렬을 이용하여 분석하는 기법을 제안한다. 교착 상태란 패트리 넷에서 마킹이 더 이상 진행 되지 못하고 서로 점화 가능 상태를 기다리는 상태로 자원 공유의 문제에서 많이 발생 가능하다. 따라서. 모든 플레이스와 트랜지션과의 관계를 나타내는 추이적 행렬을 이용하여 간단하게 확인분석이 용이한 기법을 제안한다.

• The monthly packaging world
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• s.15
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• pp.81-85
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• 1994

이 글은 대한인쇄문화협회가 지난 6월 16일 개최한 '환경을 고려한 인쇄잉크의 생산과 이용' 이라는 주제의 세미나에서 발표된 내용을 옮긴 것이다. 인쇄잉크산업에 있어서 환경대책과 고품질화를 위한 연구, 그리고 구미지역에서 대두유를 이용해 개발한 인쇄잉크의 사용 현황과 기술적 추이에 대해 이해를 도울 것으로 기대한다.

• Journal of Digital Convergence
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• v.14 no.2
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• pp.459-468
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• 2016

This study analyzed in depth the students' health fitness trend characteristics based on the per generation characteristics longitudinal grade level document that was produced by collecting heath fitness measurements of students from all over the country for the purpose of exploring the appropriate wellness management plan. The following conclusion was derived through the collected materials and results according to the research purpose and method. First, it was determined that muscular endurance trends for both boys and girls in their elementary school period were similar for the current generation and the previous one, but as they went through their middle school period their muscular endurance development levels were found to be reduced compared with the previous generation students. Second, there was no difference in the cardiorespiratory endurance trends between the current and the previous generation students, unlike all other physical factors. Third, the boys displayed deteriorated reflex development during their growth period compared with their previous generation counterparts. On the other hand, girls displayed mostly stagnant development once they reached 8th grade level within their generation.