• Journal of Convergence for Information Technology
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• v.12 no.5
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• pp.100-106
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• 2022

A longitudinal study refers to a research method based on longitudinal data repeatedly measured on the same object. Most of the longitudinal analysis methods are suitable for prediction or inference, and are often not suitable for use in exploratory study. In this study, an exploratory method to analyze longitudinal data is presented, which is to find the longitudinal trajectory after determining the best number of clusters by clustering longitudinal data using self-organizing map technique. The proposed methodology was applied to the longitudinal data of the Employment Information Service, and a total of 2,610 samples were analyzed. As a result of applying the methodology to the actual data applied, time-series clustering results were obtained for each panel. This indicates that it is more effective to cluster longitudinal data in advance and perform multilevel longitudinal analysis.

• Journal of The Korean Association For Science Education
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• v.28 no.2
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• pp.169-179
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• 2008

In this study, 46 teaching materials for understanding the nature of science (NOS) were developed based on the 42 statements describing the NOS. Each teaching material involves scientific knowledge and scientific inquiry skills as well as NOS statements. Teaching materials consist of students' learning worksheets and teachers' guides. Among the materials, 11 materials for understanding the nature of scientific thinking (NOST) were applied to 3 scientifically gifted students. As results, the degree of difficulty was appropriate and students showed interests in scientific thinking rather than new concepts or inquiry activities involved in the materials. It was expected that understating the NOST would be helpful for conducting scientific inquiry in more authentic way. And similarly to the Park's (2007) theoretical discussions about the relationship between the NOS and scientific creativity, students actually responded that undertrading the NOST could help their creativity. Therefore, it was expected that teaching the NOST would be plausible elements for teaching scientific creativity.

• The Journal of the Korea Contents Association
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• v.16 no.6
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• pp.441-449
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• 2016

The integrated data is an essential in the analysis for the balanced development of the local governments, but economic, social and cultural data in local governments is not being made with integrated management. A variety of information is being published according to the Government 3.0 era, but the researchers has great difficulty in integrating the analysis for one topic because related information is scattered in various sites. This paper proposes an integrated database(DB) of local governments to support the research activities. It has to contains total information of economic, social and cultural activities of local governments, and accommodate the distributed and heterogeneous data. It has the schema designed to integrate the entire data for considering the differences between local governments or data components. We should focus to build a framework for the multifaceted research to enable the cross analysis over common elements.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.36 no.2
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• pp.67-74
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• 2018

This study has proposed a methodology to detect suspicious facilities that occupy national and public land by using the cadastral and digital maps. First, we constructed a spatial database of national & public land based on the cadastral maps by linking its management ledger. Using the PNU (Parcel Number) code as a key field, the data managed by different institutions are integrated into a single spatial information DB (database) and then, the use or nonuse state of each parcel is confirmed on the cadastral map. Next, we explored the suspicious facilities that existed in the unused parcel by utilizing the digital topographical map. Then, the proposed methodology was applied for various regions and tested its feasibility. Through this study, it will be possible to improve the utilization of digital maps and to manage the national and public land efficiently and economically.

• The Journal of the Korea Contents Association
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• v.18 no.4
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• pp.128-137
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• 2018

This study aims to investigate how learning materials are used in an outstanding English class and to analyze learning materials and their use in primary English classroom activities. To this end, An Analytic Scheme of Learning Materials Use (ASLMU) is used to quantify utilization patterns of learning materials. The findings are: Learning materials are most actively used in the development period, followed by introduction and consolidation. The teacher's rate of using learning materials is much higher than student's, and the rate of using materials for whole students is higher than the rate of using materials for an individual or groups. It requires developing learning materials toward more a student-centered class because the teacher's occupancy of the learning materials is fourfold compared to the student's occupancy. Also, non-language materials are used more than language materials, and English materials are used more than Korean materials. Most of the materials are used to present a question and explain. The findings of the study are expected to suggest features of learning materials in an outstanding English class and application method of learning materials to primary English teachers.

• The tire
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• s.153
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• pp.26-34
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• 1991

이 자료는 미국의 타이어 전문지인 ‘Modern Tire Dealer'에서 1990년도 미국의 타이어산업 및 타이어시장 전반에 관한 실적을 조사 · 분석한 것이다. 그리고 이 자료는 주고 미국의 타이어산업에 대하여 분석하였으나, 일부 카나다 타이어시장에 대한 분석 자료도 포함되어 있다.

• The tire
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• s.165
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• pp.70-76
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• 1993

이 자료는 미국의 타이어 전문지인 ‘Modern Tire Dealer'에서 1992년도 미국의 타이어산업 및 타이어시장 전반에 관한 실적을 조사 · 분석한 것이다. 그리고, 이 자료는 미국의 타이어산업에 대하여 분석하였으나, 일부 캐나다 타이어시장에 관한 분석자료도 포함되어 있다.

• The tire
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• s.159
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• pp.44-51
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• 1992

이 자료는 미국의 타이어 전문지인 ‘Modern Tire Dealer'에서 1991년도 미국의 타이어산업 및 타이어시장 전반에 관한 실적을 조사 · 분석한 것이다. 그리고 이 자료는 주로 미국의 타이어산업에 대하여 분석하였으나, 일부 카나다 타이어시장에 대한 분석 자료도 포함되어 있다.

• 레미콘
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• s.77
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• pp.64-77
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• 2003

본 자료는 건설교통부에서 2004~2008년도까지의 골재부존조사 및 골재수요산정에 따라 골재수급 기본계획 발표자료로 장기적 수요전망 및 공급계획으로써 레미콘제조업체의 원자재 수급조정에 참고자료로 활용토록 편집게재합니다.

• Journal of the Korean Geographical Society
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• v.50 no.6
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• pp.717-734
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• 2015

The Toyo Bunko (東洋文庫) in Tokyo, Japan is one of the largest library that holds the Korean old geographical documents. About 200 topographies of counties and prefectures, including Giinhansangnyang 杞人間商量 which recorded compilation and improvement plan of the geographical annals belong to it. Several maps and geographical annals of Joseon Period possessed in the Toyo Bunko are set high values on geography since the materials are only belong to it and have not yet been found in Korea. There are very important map collections including six copies of Daedongyeojido 大東輿地圖(1861, 1864) by Kim Jeongho(金正浩) and Suseonjeondo 首善全圖 by Kim, Jungho, collectible stamp of Maema Kyosaku(前間恭作) is imprinted on it, and Gangyeokjundo 疆域全圖 and Dongyeodo 東輿圖 which made with 20-ri and 10-ri grid, owned by Sidehara Daira(幣原坦). Especially Gwanbukjido 關北地圖 which is the northern border map recorded the Lee Sam's(李森) preface who served as a military official of Hamgyeong and Pyeongan Province in early 18th century. These maps and some other maps have a historical value to supplement of the history of Korean Cartography.