• Journal of Information Technology Services
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• v.20 no.1
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• pp.1-9
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• 2021

After being introduced "4th Industrial Revolution" in the Davos Forum 2016, it is continuously talked about "4th Industrial Revolution" as an industrial and social innovation momentum for solving structural problems of economy and society. In this situation, our government established "the Committee of 4th Industrial Revolution" as a control tower and announced a policy "4th Industrial Revolution recommendation for government" in 2019. The Ministry of National Defense is pursuing "4th Industrial Revolution" policies and organizing a team "4th Industrial Revolution Smart Defense Innovation Team" in accordance with government-wide policies from 2019. In this paper, I will look at the background and status of the Smart Defense Innovation policy. And I am proposing development plans to create practical results as like "Strengthening governance for the Smart Defense Innovation" and "Implementation of the budget for the Smart Defense Innovation" and so on.

• The Pure and Applied Mathematics
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• v.19 no.1
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• pp.1-5
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• 2012

We study surfaces of revolution in the three dimensional Euclidean space $\mathbb{R}^3$ with two distinct axes of revolution. As a result, we prove that if a connected surface in the three dimensional Euclidean space $\mathbb{R}^3$ admits two distinct axes of revolution, then it is either a sphere or a plane.

• Bulletin of the Korean Mathematical Society
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• v.53 no.2
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• pp.519-530
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• 2016

In this paper, we study surfaces of revolution in the three dimensional pseudo-Galilean space. We classify surfaces of revolution generated by a non-isotropic curve in terms of the Gauss map and the Laplacian of the surface. Furthermore, we give the classification of surfaces of revolution generated by an isotropic curve satisfying pointwise 1-type Gauss map equation.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2022.05a
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• pp.552-553
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• 2022

Key technologies of Fourth Industrial Revolution and their innovative applications are expected to bring another technological revolution going forward. The present study takes a close look at the Internet of Things (IoT) among the key technologies of the Fourth Industrial Revolution. In particular, sensor devices, which serve as the core of IoT-based application systems, are analyzed. This study also examines various applications and solutions using IoT-based systems.

• The Transactions of the Korean Institute of Electrical Engineers C
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• v.48 no.10
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• pp.681-686
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• 1999

In this study, a windmill type ultrasonic motor operated by single-phase AC electric field was fabricated, and then revolution characteristics and 3-dimensional vibration mode of the ultrasonic motor were investigated. Brass metal was pressed with umbrella-type using metal mold, then slot of 4 kind was processed at various thickness. It was found that the revolution speed of the ultrasonic motor increased with decreasing the thickness of elastic body. The revolution speed of the ultrasonic motor increased with increasing the slots of elastic body. When the characteristics was measured, applied voltage was changed from $10V_{max}\; to\; 100V_{max}$. Then, revolution was began from $30V_{max}$, if voltage was applied over $90V_{max}$ revolution speed was saturated, and not increased. The maximum revolution speed was 510[rpm] when using elastic body with 6 slots and thickness of 0.15mm. And 3-dimensional displacement mode was rotated clockwise direction.

• Journal of Korean Elementary Science Education
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• v.36 no.4
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• pp.405-427
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• 2017

This study aims to describe various teaching cases about 'earth revolution' in terms of PCK; knowledge of curriculum, knowledge of teaching strategies and knowledge of assessment. Based on these various cases we suggested PCK progressions about 'earth revolution'. For these, we recorded 'solar system and star' classes of nine elementary school teachers' in Kangwon, Gyeonggi, Gwangju, and Seoul. We adopted Lee & Lee (2016)'s topic-specific PCK framework to analyze the classes. As results, we suggested topic-specific PCK progression about 'earth revolution'. The results showed the upper anchor of the earth revolution class were exploring the reason of the change of constellation, finding the tendency of constellation change. These teachings were carried by the teachers' adaptive strategies. The upper anchor of the assessment was monitoring students' understanding during the whole class. The PCK progression about 'earth revolution' could help the teachers plan the earth revolution class, and reflect their own teachings.

• Journal of Biomedical Engineering Research
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• v.35 no.2
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• pp.26-34
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• 2014

Little information is available about the characteristics in revolution gait of hemiplegic elderly, which is frequently represented in daily life. It is also hard to elucidate purely the characteristics due to hemiplegia because of no consideration of aging factors. The aim of study is to identify the alteration characteristics of lower extremity joint angles in both straight and revolution gaits together due to hemiplegia through comparing healthy with hemiplegic elderly. Following Institutional Review Board approval, twelve healthy and hemiplegic elderly were participated and the center of body mass (COM) and lower extremity joint angles were measured during straight and revolution gaits using a computer-aided video motion capture system. The results showed that the gait characteristics were generally altered in both straight and revolution gaits due to hemiplegia (p < 0.05). The gait characteristics were then different between the straight and revolution gaits each other. This study may be valuable by identifying for the first time the alterations of the lower extremity joint angles in both straight and revolution gaits due to pure hemiplegia through comparing healthy elderly with hemiplegic elderly.

• Journal of the Korean Society of Industry Convergence
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• v.22 no.6
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• pp.729-737
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• 2019

The world is now going through the era of the Fourth Industrial Revolution. Major global economies, including the United States, Germany, Japan and China, are fostering industries related to the fourth industrial revolution with policies and investments. South Korea is also setting up its fourth industrial revolution committee under the president, expanding policies and investment to foster industries related to the fourth industrial revolution, and increasing investment in research and development. Accordingly, government and private investment in industries and technologies related to the Fourth Industrial Revolution is made extensively around the world, and many related industries and technologies are being developed. In this paper, we will look into the status and problems of Advanced Concept Technology Demonstration projects that can quickly and easily introduce technologies related to the fourth industrial revolution in the private sector where many developments are taking place, and present the direction of development.

• Journal of the Korean Society of Industry Convergence
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• v.22 no.2
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• pp.71-79
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• 2019

Since the announcement of President Klaus Schwab's fourth industrial revolution at the World Economic Forum in Davos, Switzerland in January 2016, the fourth industrial revolution has emerged as a hot topic in our society. The United States, Japan, China, and Germany, which are major advanced nations, are preparing and implementing a strategy and system for responding to the Fourth Industrial Revolution, focusing on information and communication technology (ICT) and manufacturing convergence in response to the fourth industrial revolution era. Korea is announcing the expansion of financial support for R & D investment budget and related industries for major technology related to revolution. In this paper, we analyze the defense R & D project procedure of the Defense Improvement Project, which is responsible for the development of the defense weapon system, and present the development direction of the defense weapon system in accordance with the 4th world industrial revolution trend.

• 재활복지
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• v.22 no.4
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• pp.153-172
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• 2018

This study is to examine the awareness of the 4th industrial revolution among special educational teachers as a preliminary study to explore the future special educational should continue forward in this new period. For the purposes of this study, a survey was conducted focusing on 117 special educational teachers in Korea. The major results were presented as follow. special educational teachers recognized that "the 4th industrial revolution" will have a positive effects on the special education, However, the level of understanding and interest in this was low. Moreover, Special teachers learned about 4th Industrial Revolution mainly through TV and media, recognized the needs for expert education on the fourth industrial revolution. Special teachers recognized that the Fourth Industrial Revolution was necessary for special education but was not realistically prepared. Special teachers said that programs for special education should be developed and distributed based on the 4th Industrial Revolution. In conclusion, The study is meaningful in understanding the Fourth Industrial Revolution from the perspective of special teachers and in providing basic evidence to support special education.