• 한국초등수학교육학회지
• /
• 제16권2호
• /
• pp.227-252
• /
• 2012

본 논문은 그동안 별반 연구되지 않았던 측정 영역과 관련하여, 길이와 넓이를 대상으로 안내 정도와 측정의 주요 학습 요소를 분석 기준으로 하여 제7차와 현행 교육과정 자료를 비교분석하였다. 분석 결과 교과서와 익힘책에 제시된 안내 정도와 측정의 학습요소가 비슷한 점이 많았으나, 현행 교육과정 자료에서 안내형의 비율이 줄어들고 복합형과 개방형의 비율이 늘어난 점, 그리고 측정값 계산의 비율이 줄어들고 측정추론 양감 어림, 측정단위, 측정의 구성요소에 대한 비율이 늘어난 점이 차이점으로 드러났다. 이와 같은 연구결과를 토대로 본 논문은 측정 영역의 교과서 개정과 교과서 분석에 대한 시사점을 제시한다.

• The Plant Pathology Journal
• /
• 제36권5호
• /
• pp.398-405
• /
• 2020

Nutrient manipulation is a promising strategy for controlling plant diseases in sustainable agriculture. Although many studies have investigated the relationships between certain elements and plant diseases, few have comprehensively explored how differing mineral nutrition levels might affect plant-fungal pathogen interactions, namely plant susceptibility and resistance. Here, we systematically explored the effects of the seven mineral elements that plants require in the greatest amounts for normal development on the susceptibility of soybean plants (Glycine max) to Fusarium oxysporum infection in controlled greenhouse conditions. Nitrogen (N) negligibly affected plant susceptibility to infection in the range 4 to 24 mM for both tested soybean cultivars. At relatively high concentrations, phosphorus (P) increased plant susceptibility to infection, which led to severely reduced shoot and root dry weights. Potassium (K), calcium (Ca), magnesium (Mg), sulfur (S), and iron (Fe) induced plant resistance to infection as their concentrations were increased. For K and Ca, moderate concentrations had a positive effect on plant resistance to the pathogen, whereas relatively high doses of either element adversely affected plant growth and promoted disease symptoms. Further experiments were conducted, assessing disease suppression by selected combinations of macro-elements and Fe at screened concentrations, i.e., K (9 mM) plus Fe (0.2 mM), and S (4 mM) plus Fe (0.2 mM). The disease index was significantly reduced by the combination of K plus Fe. In conclusion, this systematic investigation of soybean plant responses to F. oxysporum infection provides a solid basis for future environmentally-friendly choices for application in soybean disease control programs.

• 대한공업교육학회지
• /
• 제39권2호
• /
• pp.1-18
• /
• 2014

본 연구에서는 중등단계 직업교육에서 활용되고 있는 기존 발명 지식재산 관련 교과서를 대상으로 '발명 지식재산 핵심 학습 요소'의 반영 비율에 대한 편성 실태를 분석하고, 앞으로 중등단계 직업교육에서 요구되는 적정한 발명 지식재산 교육내용별 편성 비율을 제안하고자 하였다. 이를 위해서 현재 특성화고 및 마이스터고에서 사용되고 있는 발명 지식재산 교과서의 교육내용에 '어떤 종류의 발명 지식재산 핵심 학습 요소가, 얼마나 있는지와, 향후 어떤 학습 요소를 얼마나 편성하는 것이 바람직한가'를 연구 문제로 설정하였다. 이를 해결하기 위해서 내용분석 방법을 활용하여 발명 지식재산 교육내용의 반영 실태를 분석하고, 델파이 조사로 앞으로 요구되는 발명 지식재산 교육내용별 반영 비율을 제시하였다. 본 연구를 통해서 얻어진 결과를 제시하면 다음과 같다. 첫째, 중등단계 직업교육에서 활용되고 있는 기존 발명특허 인정도서에 포함된 발명 지식재산 핵심 학습 요소를 분석한 결과 모든 핵심 학습 요소가 교과서에 분포하고 있었으나 일부 교과서에서는 D(문제 해결과 활동)영역이 집중되어 있는 경향이 있었다. 둘째, 중등단계 직업교육에서 활용되고 있는 발명특허 인정도서에 제시되어 있는 발명 지식재산 교육내용의 영역별 반영 비율을 분석한 결과 대부분의 교과서가 창출영역에 치중되어 있는 경향이 있었으며, 일부 교과서에서는 보호영역과 활용영역을 다루고 있었다. 그러나 대체적으로 활용영역에 대한 반영 비율이 미흡한 실정이었다. 성취유형별로는 모든 교과서에서 지식영역이 주를 이루고 있었다. 또한 발명특허기초, 발명과 문제해결, 발명과 디자인 교과서에서만 기능영역을 일부 다루고 있었으며, 태도영역은 대부분의 교과서에서 없거나 미흡하게 다루고 있었다. 셋째, 전문가 델파이 조사를 통해 얻어진 중등단계 직업교육에서 요구 되는 발명 지식재산 교육 핵심 학습 요소 영역 중에서 D(문제 해결과 활동) 17.7%, E(발명 융합 지식) 2.9%, K(특허출원) 6.9%, L(특허정보 조사) 9.6%를 줄여야 하는 것으로 나타났다. 발명 지식재산 교육내용 중에서 발명 소양영역 3.1%, 지식재산 창출영역 4.5%, 지식재산 보호영역 10.6%를 줄여야 하고, 지식재산 활용영역은 17.7%를 늘려야 하는 것으로 나타났다. 또한 성취유형의 적정 반영 비율은 지식영역은 52%를 줄여야 하고, 기능영역 32.3%, 태도영역 19.6%를 늘려야 하는 것으로 나타났다.

• 지식경영연구
• /
• 제3권2호
• /
• pp.85-101
• /
• 2002

Theoretical foundations of the knowledge management(KM) have been perceived still developing in the field. And, the literature shows many key success factors for KM, but, in more conceptual and abstract term. Companies interested in knowlege management demand for practical guidelines. Based on the constituent elements of KM, this study classifies key success factors identified from thirty three success cases, domestic and in other countries. Further, fifteen propositions are suggested and discussed for future research and project management in KM.

• 한국건축시공학회지
• /
• 제12권1호
• /
• pp.31-41
• /
• 2012

In construction, the outcome of work depends on the leadership of the project manager, and as a result this has been emerging as an important factor. The purpose of this study is to analyze the main elements of leadership that are essential for project managers, and to rank these elements in order of importance. In this study, leadership and its elements are reviewed through reviewing the literature, and the main elements and their relative importance for project managers were analyzed through questionnaire survey of project managers, contractor engineers, and subcontractor engineers. Through this survey, it was found that the project manager's leadership had a significant influence on the success of a construction project, and this study revealed that the key elements of leadership for project manager could be ranked in the order of resolution, responsibility, and reliance.

• 대한기계학회:학술대회논문집
• /
• 대한기계학회 2008년도 추계학술대회A
• /
• pp.1633-1637
• /
• 2008

In this study, we developed 3D MLS-based variable-node elements for easy meshing. These elements should be derived from 2D MLS-based variable-node elements and would be utilized as key elements of easy meshing technique we proposed. Using developed 3D MLS-based variable-node elements, we demonstrated several examples having complex configuration compared with conventional meshing technique. Moreover, we compared with the stress results of our model and conventional one.

• 한국멀티미디어학회논문지
• /
• 제17권12호
• /
• pp.1521-1527
• /
• 2014

This paper presents to design User eXperience(UX) of anthropomorphic animal characters search system (hereinafter, AACSS) for efficient user search. To this end, meta data were utilized herein to elevate the search efficiency of multimedia information and text information. Anthropomorphic animal characters require the human elements and the animal elements, thus this paper extracted the key elements of meta data as below; phenotypic element in animal system classification (Morphologic property elements, Ecological property elements, Behavioral property elements), emotion classification, which is the trait of personification and the Step of Anthropomorphic Animal Characters.

• Structural Engineering and Mechanics
• /
• 제14권5호
• /
• pp.595-610
• /
• 2002

This paper presents an efficiency of various non-conforming (NC) modes in development of a series of new finite elements with the special emphasis on 4-node quadrilateral elements. The NC modes have been used as a key scheme to improve the behaviors of various types of new finite elements, i.e., Mindlin plate bending elements, membrane elements with drilling degrees of freedom, flat shell elements. The NC modes are classified into three groups according to the 'correction constants' of 'Direct Modification Method'. The first group is 'basic NC modes', which have been widely used by a number of researchers in the finite element communities. The basic NC modes are effective to improve the behaviors of regular shaped elements. The second group is 'hierarchical NC modes' which improve the behaviors of distorted elements effectively. The last group is 'higher order NC modes' which improve the behaviors of plate-bending elements. When the basic NC modes are combined with hierarchical or higher order NC modes, the elements become insensitive to mesh distortions. When the membrane component of a flat shell has 'hierarchical NC modes', the membrane locking can be suppressed. A number of numerical tests are carried out to show the positive effect of aforementioned various NC modes incorporated into various types of finite elements.

• 한국분말야금학회:학술대회논문집
• /
• 한국분말야금학회 2006년도 Extended Abstracts of 2006 POWDER METALLURGY World Congress Part 1
• /
• pp.303-304
• /
• 2006

The mechanical properties of ferrous powder metallurgy (P/M) materials are directly related to their microstructure. Ferrous P/M materials with sufficient hardenability will develop microstructures containing significant percentages of martensite in the as-sintered condition. Recently, sinter-hardening has developed into a highly cost effective production method through hardened P/M parts without the need for additional heat-treatments. This paper reviews the advances of sinter-hardening as well as some key processing parameters such as sintering temperature, cooling rate, tempering required to produce high quality sinter-hardened components. Specific topics including effect of alloying elements, alloying methods, and the Characterization and observation of microstructure are discussed.

• Journal of Mechanical Science and Technology
• /
• 제14권3호
• /
• pp.272-282
• /
• 2000

Based on numerical reduced minimization theory, new anisoparametric 3-node elements for out-of-plane curved beam are developed. The elements are designed to be free from spurious constraints. In this paper, the effect of the Jacobian upon numerical solution is analyzed and predicted through reduced minimization analysis of anisoparametric 3-node elements with different Jacobian assumption. The prediction is verified by numerical tests for circular and spiral out-of-plane deformable curved beam models. This paper proposes two kinds of 3-node elements with 7-DOF; one element employs 2-point integration for all strains, and the other element uses 3-point integration with a constant Jacobian within element for calculation of shear strain.