• The Journal of Engineering Geology
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• v.5 no.2
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• pp.215-231
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• 1995

The key concepts of seismic moment tensor are introduced in a 'physicist - oriented' style. The theory and application of seismic moment tensor which have been developed since the 1970s have become one of the most important branches in modern seismology. The description of earthquake sources in the modern seismology have led to much deeper understanding of the physics of indigenous earthquakes as well as various kinds of artificial seismic events, such as underground explosions, mining rockbursts, and reservoir induced tremors. Furthermore, with the development of digital seismological observation, some concepts, which were not included in 'classical' seismology, or not so important in 'classical' seismology, has become more and more important. It seems that it has been the time to have a new look at the fundamentals of seismology as a branch of applied physics, especially the part dealing with the physics of earthquake sources. Also in this field it may be important to clarify some fundamental concepts which, unexpectedly, have caused confusions even among professionals.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2015.10a
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• pp.897-899
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• 2015

These days, the students are learned from game experience such as the code grammatical elements of selection, repetition and decision. In this study, lets the students who have had no coding education make games based on the students's game experience using the programming tool Scratch, and they are realized the similarities between the game experience and the logical, grammatical elements of the coding concepts. We will discuss that was resulted an marked improvements of understanding of the coding concepts, the ability of applications and creativity and classroom participation consequently.

• Nuclear Engineering and Technology
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• v.48 no.1
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• pp.87-97
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• 2016

The new generation of nuclear power plants (NPPs) will likely make use of state-of-the-art technologies in many areas of the plant. The analysis, design, and selection of advanced human-system interfaces (HSIs) constitute an important part of power plant engineering. Designers need to consider the new capabilities afforded by these technologies in the context of current regulations and new operational concepts, which is why they need a more rigorous method by which to plan the introduction of advanced HSIs in NPP work areas. Much of current human factors research stops at the user interface and fails to provide a definitive process for integration of end user devices with instrumentation and control and operational concepts. The current lack of a clear definition of HSI technology, including the process for integration, makes characterization and implementation of new and advanced HSIs difficult. This paper describes how new design concepts in the nuclear industry can be analyzed and how HSI technologies associated with new industrial processes might be considered. It also describes a basis for an understanding of human as well as technology characteristics that could be incorporated into a prioritization scheme for technology selection and deployment plans.

• Education of Primary School Mathematics
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• v.4 no.1
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• pp.1-17
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• 2000

The purpose of this study is to analyze the articulation between the kindergarten and 1st grade in mathematics education. for this purpose, the problems of this study selected as follows ：(ⅰ) What is the mathematical concepts related between the kindergarten curriculum and the 1st grade curriculum\ulcorner (ⅱ) How is the mathematics classroom in the kindergarten and 1st grade\ulcorner (ⅲ) Which instructional materials are used in the kindergarten and the 1st grade\ulcorner (ⅳ) What is the new direction of articulation between the kindergarten and first grade in mathematics education\ulcorner The results of this study are as follows ： (ⅰ) According to examining each curriculum the focus is on understanding the basic concepts of number in the kindergarten, on the concepts of number, addition and subtraction in the 1st grade. (ⅱ) By being analyzed the mathematics classrooms of the kindergarten and the 1 st grade, it is different the focus of lessons or the teaching strategies. (ⅲ) As a result of analysing the teaching plans in the kindergarten and the survey in the first grade teachers, used instructional materials are manipulative ones. While mainly used materials are puzzles and blocks in kindergarten, a paduk stone, number cards, sankagi are used in 1st grade. (ⅳ) Finally, we propose the direction of articulation between the kindergarten and 1st grade in mathematics education.

• International Journal of Advanced Culture Technology
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• v.11 no.2
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• pp.210-220
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• 2023

We analyzed and compared factors such as changes in the degree of difficulty of concepts presented in Chemistry I textbook, changes in class types (non-face-to-face, face-to-face), etc. on academic achievement by level (upper, middle, and lower). Students from A high school in Gyeongsangnam-do were selected for the subjects of the study. As a result of analyzing the change in the degree of difficulty of concepts, the total score of chemistry I combined by non-face-to-face and face-to-face classes during the second semester was lower than that of the first semester. As a result of analyzing the impact of factors such as changes in conceptual difficulty, changes in class types, etc. on academic achievement by level, students' grades at the 'lower level' by non-face-to-face classes were lower than those by face-to-face classes. In particular, at the lower level of the second semester, there was a large difference in grades between non-face-to-face and face-to-face classes. In the results of these studies, it was found that instructors' active feedback is important to identify difficulties in understanding learning contents for students with low levels of academic achievement and improve them at the same time.

• Journal of Science Education
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• v.33 no.2
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• pp.346-352
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• 2009

The purpose of this research was to analyze the chinese chemistry terminology in chemistry unit of 7th grade science textbooks in 7th curriculum and find relationship between student understanding and difficulty index for chinese preferred students and non-chinese preferred students. The chinese terminology in 7th curriculum was reduced less than that of 6th curriculum but still was over 70%. Students had difficulties in understanding of abstract terminologies and science terms but thought easily the concrete, common terminologies. The tendency of student understanding was similar to that of difficulty index. For chinese chemistry terminology, understanding of chinese preferred students was higher than that of non-chinese preferred students. For easily translated chemistry terminology, there was no significant difference but both were showed the improved understanding. Therefore student understanding should be improved in science if science textbooks would be written by easily translated chemistry terminology.

• Journal of the Korean School Mathematics Society
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• v.15 no.3
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• pp.511-533
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• 2012

In order to determine whether there is a significant correlation between relational understanding and creative math. problem finding ability, this study performed relational understanding and problem finding ability tests on a sample of 186 8th grade middle school students. According to the study results, we found a very significant positive correlation between relational understanding and the creativity of the mathematising ability and the combining ability of mathematical concepts in the problem finding ability. Although there was no statistically significant correlation between relational understanding and the extension ability of mathematical facts, the results from analyzing the students response rate and actual scores in each test showed that students with high relational understanding scores also had high response rate and high scores in analogical reasoning and inductive reasoning. Through this study, therefore, relational understanding is found to have a positive impact on the creative mathematics problem finding ability.

• Journal of The Korean Association For Science Education
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• v.28 no.1
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• pp.24-31
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• 2008

This study aims at examining the concepts that apply in understanding the water cycle, to inquire into the concept related to the unit of earth structure that are taught in the Earth Science I. Analysis of word association, drawing and questionnaires showed that it was difficult for them to understand the water cycle within the earth system, and to put components into one integrated system together. In other words, it showed that they have a low standard of understanding in connection with the water cycle, that their understanding of water cycle are simple thoughts rather than systematic thought. It showed that they had an understanding of the atmosphere and hydrosphere to some extent, but they took no notice of the effect of the lithosphere or biosphere, nor do they have an understanding of its effect. Analysis of questionnaires showed that they have no well understanding of water cycle of cyclic nature, and that they have low standard of understanding of the components of water cycle.

• Korean Journal of Child Studies
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• v.26 no.5
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• pp.185-204
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• 2005

This paper demonstrated how application of evolutionary knowledge to developmental perspectives enhances understanding of human ontogeny. Evolutionary Developmental Psychology (EDP) explains human behavior through evolutionary principles and focuses on ontogeny rather than phylogeny. In this paper, the authors review concepts of evolution, adaptations, and the processes of evolution from EDP perspectives. The definition and basic assumptions of EDP are introduced, followed by explanations of how evolution happens in ontogeny by looking at developmental systems approaches, concepts of ontogenetic and deferred adaptations, evolution of childhood, and brain plasticity. Possible pathways of evolution in ontogeny are also discussed. Finally, some research methodology for applying EDP to child development is suggested with specific hypotheses and studies.

• East Asian mathematical journal
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• v.32 no.4
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• pp.443-464
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• 2016

The purpose of ths study is to compare and analyze the sequence of teaching multiplication facts in the elementary school mathematics. Generally, the multiplication in the elementary school mathematics is composed of the followings; concepts of multiplication, situations involving multiplication, didactical models for multiplication, and multiplication strategies for teaching multiplication facts. This study is focusing to multiplication facts, especially to the sequence of teaching and multiplication strategies. The method of this study is a comparative and analytic method. In order to compare textbooks, we select the Korean elementary mathematics textbooks(1st curriculum~2009 revised curriculum) and the 9 foreign elementary mathematics textbooks(Japan, China, Germany, Finland, Hongkong etc.). As results of comparative investigation, the sequence of teaching multiplication facts is reconsidered on a basis of elementary students' mathematical thinking. And the connectivity of multiplication facts is strengthened in comparison with the foreign elementary mathematics textbooks. Finally multiplication strategies for teaching multiplication facts are discussed for more understanding and reasoning the principles of multiplication facts in the elementary school mathematics.