• Title/Summary/Keyword: 자기 특성

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A Study on Dipole Modeling Method for Ship's Magnetic Anomaly using Singular Value Decomposition Technique (특이치 분해 방법에 의한 함정 자기원 다이폴 모델링 방안 연구)

  • Yang, Chang-Seob;Chung, Hyun-Ju
    • Journal of the Korean Magnetics Society
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    • v.17 no.6
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    • pp.259-264
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    • 2007

  • This paper describes the mathematical modeling method for the static magnetic field signature generated by a magnetic scale model. we proposed the equivalent dipole modeling method utilizing a singular value decomposition technique from magnetic field signatures by magnetic sensors are located special depths below the scale model. The proposed dipole modeling method was successfully verified through comparisons with the real measured values in our non-magnetic laboratory. Using the proposed method, it is possible to predict and analyze static magnetic field distributions at any difference depths generated from the real ships as well as a scale model ship.

  • https://doi.org/10.4283/JKMS.2007.17.6.259 인용 PDF KSCI

Relationships among Students' Self-Regulation Strategy, Cognitive Conflict, and Conceptual Change in Learning Density (밀도 개념 학습에서 자기 조절 전략과 인지 갈등 및 개념 변화의 관계)

  • Kang, Suk-Jin;Shin, Sook-Hee;Noh, Tae-Hee
    • Journal of the Korean Chemical Society
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    • v.46 no.1
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    • pp.83-89
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    • 2002

  • In this study, students' responses to anomalous data in studying ‘density' were analyzed, and the relationships among trait/state self-regulation strategies, the degree of cognitive conflict, and conceptual change were examined. A trait self-regulation strategy test, a preconception test, and a test of response to anomalous data were administered to 352 eighth graders. Among them, 146 students whose preconceptions were consistent with the presented initial theory were selected. After they had read a scientific explanation, a state self-regulation test and a researcher-made conception test were administerd. There were no significant correlations among the subcategory scores of trait/state self-regulation strategies and the degree of cognitive conflict. The scores of the conception test were significantly correlated with those of trait planning, trait effort, state planning, state self-monitoring, and state effort. State effort was only a significant predictor on students' conceptual change.

  • https://doi.org/10.5012/jkcs.2002.46.1.083 인용 PDF KSCI