• Journal of Elementary Mathematics Education in Korea
• /
• v.19 no.4
• /
• pp.563-588
• /
• 2015

In elementary school, didactical transposition is inevitable due to several reasons. In mathematics, addition and multiplication are taught as binary operations, subtraction and division are taught as unary operations. But in elementary school, we try to teach all the four operations as binary operations by didactical transposition. In 'Mastering' the concepts of the four operations, the way of concept introduction is dealt importantantly. So it is different from understanding the four operations. In this study, we analyzed the four operations of natural numbers and fractions from two perspectives: concept understanding (how to introduce concepts and how to choose an operation) and connection between the operations. As a result, following implications were obtained. In division of fractions, students attempted a connection with multiplication of fractions right away without choosing an operation, based on the situation. Also, to understand division of fractions itself, integrate division of fractions presented from the second semester of the fifth grade to the first semester of the sixth grade are needed. In addition, this result can be useful in the future textbook development.

• 제어로봇시스템학회:학술대회논문집
• /
• 2002.10a
• /
• pp.64.3-64
• /
• 2002

$\textbullet$ Introduction to 3-Dimensional Nanorobotic Manipulation System $\textbullet$ Concept Design and Operating Principle $\textbullet$ Analytic Model for target System $\textbullet$ Fabrication and Experimental Setup of 3-DOF Mobile Microrobot $\textbullet$ Experimental Works or 3-DOF Mobile Microrobot

• 제어로봇시스템학회:학술대회논문집
• /
• 2002.10a
• /
• pp.76.4-76
• /
• 2002

$\textbullet$ Contents 1 Introduction $\textbullet$ Contents 2 Model of Two-inertia System $\textbullet$ Contents 3 Concept of CDM $\textbullet$ Contents 4 Controller Design $\textbullet$ Contents 5 Experimental Results $\textbullet$ Contents 6 Conclusions

• 제어로봇시스템학회:학술대회논문집
• /
• 2002.10a
• /
• pp.38.2-38
• /
• 2002

1. Introduction 2. Potential theory and Local minimum problem 3. Discrete modeling method 4. Virtual obstacle concept and extra potential function 5. Simulations 6. Conclusions

• 제어로봇시스템학회:학술대회논문집
• /
• 2002.10a
• /
• pp.81.2-81
• /
• 2002

$\textbullet$ Introduction- Concept and meaning of the emotional Recognition $\textbullet$ The feature of 4-emotions $\textbullet$ Pitch(approach) $\textbullet$ Simulator-structure, RNN(learning algorithm), evaluation function, solution search method $\textbullet$ Result

• Journal of the korean Society of Automotive Engineers
• /
• v.12 no.4
• /
• pp.1-8
• /
• 1990

자동차는 여러 성격을 지닌 다목적 공간이다. 예를들면 안락감을 느끼는 개인 공가능로서의 차, 또 이용수단이나 운반도구로서의 차, 게다가 즐거움을 맛보면서 운전할 수 있고, 경쾌함과 민첩함을 갖는 것이 그것이다. 본 고에서는 미래형자동차를 소개하고, 우주기기 및 항공기 분야에서의 기술이전 전망을 통한 미래의 자동차 공학의 전망을 알아본다.

• Communications of Mathematical Education
• /
• v.33 no.3
• /
• pp.255-273
• /
• 2019

In order to help students to understand the essence of prime concepts, this study looked at the history of prime concept development and analyzed how to introduce the concept of textbooks. In ancient Greece, primes were multiplicative atoms. At that time, the unit was not a number, but the development of decimal representations led to the integration of the unit into the number, which raised the issue of primality of 1. Based on the uniqueness of factorization into prime factor, 1 was excluded from the prime, and after that, the concept of prime of the atomic context and the irreducible concept of the divisor context are established. The history of the development of prime concepts clearly reveals that the fact that prime is the multiplicative atom is the essence of the concept. As a result of analyzing the textbooks, the textbook has problems of not introducing the concept essence by introducing the concept of prime into a shaped perspectives or using game, and the problem that the transition to analytic concept definition is radical after the introduction of the concept. Based on the results of the analysis, we have provided several pedagogical implications for helping to focus on a conceptual aspect of prime number.

• International Journal of Fuzzy Logic and Intelligent Systems
• /
• v.7 no.4
• /
• pp.249-255
• /
• 2007

In this paper, we introduce the concept of double fuzzy preproximity spaces as a generalization of a fuzzy preproximity spaces and investigate some of their properties. Also we study the relationships between double fuzzy preproximity spaces, double fuzzy topological spaces and double fuzzy closure spaces. In addition to this was the introduction of the concept of double fuzzy neighborhood system and has been studying the connection with double fuzzy preproximity, which resulted in the definition of the concept double fuzzy preproximal neighborhood.

• Korean Institute of Interior Design Journal
• /
• no.17
• /
• pp.128-135
• /
• 1998

The first issue was concerning the subject to provide students with an understanding of the principle of light its concept mental factors etc and with the observation and analysis of the light of an object and its form which is the process for designers to be able to deal with the deeper design concept by complementing the setting of necessary concept. The second issue was concerning the process of basic learning about basic electricity and lighting that lighting designers or interior decoration and architecture designer should have such as the introduction of light in kind of light source lighting system and so forth. The third issue was focused on practical affairs such as design and expression techniques the calculation of illumination using the computer simulation and so on. In addition such issues as the history of lighting photograph and its linkage with the field of engineering about new material ware addressed.

• Journal of the Korea Institute of Military Science and Technology
• /
• v.9 no.3
• /
• pp.66-76
• /
• 2006

Sense and Respond Logistics(SARL) is a transformational, network-centric, knowledge-driven concept that enables joint effects-based operations and provides precise, agile support. Sense and respond logistics relies upon highly adaptive, self-synchronizing, and dynamic physical and functional processes. It predicts, anticipates, and coordinates actions that provide competitive advantage across the full range of military operations. In this research paper, we considered the essential prerequisite to introduce the appropriate SARL concept for the future warfare environment into the military logistics support system and also provide the conceptual alternatives to actualize the introduction of SARL.