• Journal of the Korea Concrete Institute
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• v.26 no.4
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• pp.465-474
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• 2014

This is a comparative study that shows the overall environmental impacts from concrete structures when different compressive strength of concrete applied to structural systems having the same reference flow with different durability. A total of 24 MPa, 40 MPa and 60 MPa cases is analyzed to define the characteristic using end-point perspective LCA methodology including the stages of production, construction, maintenance and disposal. As results, global warming, non-renewable energy and respiratory inorganics problems are the major issues for assessing environmental impacts of concrete products.

• Journal of Korean Society of Rural Planning
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• v.19 no.2
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• pp.129-138
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• 2013

The aim of the research was to analyze programs, outcomes, promotion process, and operation methods of neighbourhood making to provide basic information for progressive improvement directions in the future. Buk-gu in Gwanju city, samdeok-dong in Daegu city and dongpirang in Tongyeong city were selected for a comparative analysis. The main bodies of neighbourhood making for promoting a local amenity were analysed for this research. The results indicated that a voluntary and continuous participation of residents was expected in the case of neighbourhood making led by the residents. However, a steady budget support from the outside was necessary for the continuous management and improvement of neighbourhood organization. For this, a voluntary agreement was required through the consultative group and committee formation. The member of civil organization has a limitation in the ability to develop and maintain continuos activities in the case of neighbourhood making led by a civil organization. This research found that operation methods including the constant checking, the search for new ideas through assessment of the resident's participation, local festivals for a community formation and real satisfactions of residents' desires were needed in the neighbourhood making led by a civil organization. A participation rate in neighbourhood making was low in the case of neighbourhood making led by administrative bodies. This result indicated that the long-term strategics for space renewal and community revitalization were important. Various easy ways of residents' participation to reflect their interests and operation systems were also needed. Finally, current local issues, active residents' participation and residents' opinions would be included in the process of neighbour making in the future.

• Biomolecules & Therapeutics
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• v.24 no.2
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• pp.156-162
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• 2016

Iridoid glycosides (mainly geniposide) and crocetin derivatives (crocins) are the two major active constituents in Gardenia jasminoides Ellis. In the present study, geniposide, crocins, crocin-1 and crocetin were separated from gardenia chromatographically. Then, mice were orally administrated with geniposide (400 mg/kg b.w.), crocins (400 mg/kg b.w.), crocin-1 (400 mg/kg b.w.) and crocetin (140 mg/kg b.w.) once daily for 7 days with $CCl_4$. Hepatoprotective properties were evaluated by biochemical parameters: Administration of geniposide, crocins, crocin-1and crocetin significantly lowered serum alanine transaminase (ALT), aspartate transaminase (AST) and alkaline phosphatase (ALP) levels in $CCl_4$-treated mice. The reduced glutathione (GSH) levels and antioxidant enzymes (SOD and CAT) activities were also increased by geniposide, crocins, crocin-1 and crocetin. Histopathological examination of livers showed that these components reduced deformability, irregular arrangement and rupture of hepatocyte in $CCl_4$-treated mice. These biochemical results and liver histopathological assessment demonstrated that geniposide, crocetin derivatives and crocetin show comparative beneficial effects on $CCl_4$-induced liver damage via induction of antioxidant defense. Therefore, contents of geniposide and crocetin derivatives should be both considered for hepatoprotective efficacy of Gardenia jasminoides Ellis.

• Journal of the Korean School Mathematics Society
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• v.19 no.4
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• pp.441-457
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• 2016

The purpose of this study is to analyze Korean students' mathematics achievement characteristics and draw implications for better math education in schools through comparing the results of three east Asian top level countries, Korea, Singapore, and Japan in PISA 2012 results. As a results, the rate of correct answers of Korea students was relatively low compared with those of Singapore, but relatively higher than Japan. From the results of effect size, similar results from t-test was discovered. As shown in analysis according to sub-elements in math assessment framework, the Korean students had low effect size in every sub-elements than Singapore. and they had high effect size at most of sub-elements than Japan, except "personal" context. In top performing level(above level 5), the Korean students had high effect size at "quantities" in mathematical contents, and "employ" in mathematical processes compared with Singapore. And they had row effect size at 6 sub-elements compared with Japan.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.38 no.1
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• pp.131-142
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• 2015

It is difficult to make an accurate estimate of the economic value and effects on societal economy of Nano-technologies. This research measures an economic value of Nano-technologies quantitatively and analyzes its influences on societal economy. This paper chooses some major industries as analysis targets and adapts the DEFRA comparative methodology model which has been developed in the UK and recommended by OECD. For this reason, some industries which are in range of economic value assessment were investigated and related data were collected. Also, the economic value and societal influences of Nano-technologies were calculated, through the procedure of the model. In addition, this study conducts a questionnaire to experts for the validity of measurement results and procedures. This paper suggests a guideline for economic value and effects on societal economy of Nano-technologies assessments through quantitative Defra comparative methodologies.

• Education of Primary School Mathematics
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• v.18 no.1
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• pp.1-16
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• 2015

This study is a comparative study on the Korean and Chinese elementary school mathematics curriculum. Korea and China have announced a new mathematics curriculum in 2011, and have recently carried out in the whole school year. Korea and China are the countries to manage the national curriculum. The comparison with China is significant because of the similarity of our tradition and culture. In addition, the influence of Chinese education has been increasing gradually. Thus, the curriculum comparison between China and Korea has a significant value. Through this study, I extract the significant implications of mathematics education in Korea. This study can be summarized as the following. First, I have analyzed the elementary mathematics curriculum document systems in Korea and China. Second, I compared the goals of mathematics education in Korea and China. Third, this study compared the content areas and learning in elementary school mathematics curriculum in Korea and China. Fourth, I have analyzed the teaching and learning methods and the assessment of Korea and China. Finally, we compared and analyzed the proposed points for action set out in elementary school mathematics curriculum courses in Korea and China. The results of this study are expected to provide significant implications for the new curriculum document structure and mathematical contents of Korea.

• Journal of Korean Library and Information Science Society
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• v.50 no.3
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• pp.23-47
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• 2019

In order to ascertain disciplinary differences in publication patterns that can help improve assessment of research performance in Korea, we analyzed the bibliometric data of six disciplines from Korea Citation Index. Results showed differences in research size, competitiveness, productivity, impact, and collaboration among disciplines. Disciplines in science were the largest in terms of author and institution followed by humanities and social science, but humanities produced the most publications per author, followed by social science and science disciplines. Sociology publications received most citation per paper but humanities received most citations per author, which was greatly influenced by the number of co-authors per paper. Distribution of author counts per paper varied widely across disciplines. Humanities were dominated by single-author publications, whereas the majority of publications in sciences were co-authored. The study also highlighted differences in citation lag time and illustrated differences in distribution and impact of core authors and institutions across disciplines.

• The Journal of Korean Association of Computer Education
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• v.22 no.3
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• pp.15-23
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• 2019

Recently, as the importance of computational thinking(CT) education, the national curriculums of the world have been revised and the international comparative assessment studies have been conducted to evaluate the CT education effects. In this study, researchers compared and analyzed the achievement standards related to CT in Korean and U.S. curriculum. As a result, the number of CT related achievement standards is 16 in Korean and 21 in American. While Korean deals with more specific achievement standards of 'formulating and analyzing problems', American emphasized 'planning and evaluating solutions'. In terms of 'developing algorithms, programs and interfaces', both of them offer concrete related achievement standards, U.S. curriculum include more diverse and concrete practical achievement statements. The results of this study can be used to suggest improvements in practical aspects as well as contents in future Korean curriculum revision.

• Korean Journal of Construction Engineering and Management
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• v.20 no.5
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• pp.125-136
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• 2019

This study investigated checked risk level before bid, actual risk level after award, contingency, and cost growth rate in the 124 international construction projects executed by Korean major companies. This study conducted comparative analysis by product type using rank analysis, ANOVA and correlation analysis. As a result, plant and civil projects have worse risk level than architecture projects not only in before bid but also in after award. Especially, country risk is the worst risk in both plant and civil projects, followed by project risk and capability risk. Also, although plant and civil projects reflect more contingency than architecture projects, contingency is not correlated with the checked risk level before bid. Lastly, the cost growth rate is correlated with the actual risk level in all product types. This study is expected to support in planning better practical risk management for international construction projects.

• The Korean Journal of Archival Studies
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• no.50
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• pp.61-95
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• 2016

Many scholars exerted efforts to establish archival studies as a specialized academic domain. Two of the most often-quoted leading scholars who worked for the emergence of modern archival studies were English archivist Hilary Jenkinson (1882-1961) and American archivist Theodore R. Schellenberg (1903-1970). As they were published over 50 years ago, their theories were not only applied in various areas, but they also served as important principles in archival practice in the past. Nevertheless, there only exists a few translated books on the prominent archival theories. These studies-which directly focus on their theories or related studies such as comparative studies-lack Korean translations. The objectives of this study are to review Jenkinson and Schellenberg's biography and their professional achievements, as well as to empirically examine and investigate why there were differences in their theories by reviewing the periods they had lived and worked in. To achieve these objectives, the review of their academic and biographical backgrounds was prioritized. Their archival definitions, assessment, roles and perspectives on education as archivists were then compared one by one.