• The Journal of the Acoustical Society of Korea
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• v.41 no.5
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• pp.518-524
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• 2022

In this paper, we propose a method for combining convolutional neural networks and attention mechanism to improve the recognition performance of emotional stress from Electroencephalogram (EGG) signals. In the proposed method, EEG signals are decomposed into five frequency domains, and spatial information of EEG features is obtained by applying a convolutional neural network layer to each frequency domain. As a next step, salient frequency information is learned in each frequency band using a gate transformer-based attention mechanism, and complementary frequency information is further learned through inter-frequency mapping to reflect it in the final attention representation. Through an EEG stress recognition experiment involving a DEAP dataset and six subjects, we show that the proposed method is effective in improving EEG-based stress recognition performance compared to the existing methods.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2011.05a
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• pp.463-466
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• 2011

유무선 초고속 인터넷 연결과 모바일기기의 발달로 사이버공간을 이용하는 멀티미디어 교육용 콘텐츠에 대한 연구가 필요하다. 본 논문에서는 인터넷 가상공간에서 로봇조립에 대한 이해를 돕기 위해서 교육용 콘텐츠를 디자인하고 구현한다. 콘텐츠는 로봇 부품을 사용자가 조립해 나가는 과정으로 플래시 애니메이션 기법과 액션 스크립트을 활용해서 동영상과 상호작용을 조립과정 콘텐츠에 나타내었다. 인터넷 가상공간에서 사용자 중심의 상호 작용을 통하여 로봇 조립과정을 구현함으로써 가상공간에서 사용자 직접 조작으로 조립함으로서 교육효과를 증진시킬 수 있다. 현재의 구현과정은 이미지위주의 제한적 조립과정이지만 향후에는 3차원 모델링기반의 AR(증강현실) 구현으로 발전할 수 있다.

• Journal of the Korean Geographical Society
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• v.32 no.1
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• pp.47-68
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• 1997

The purpose of this study is to clarify both the characteristics of the spatial variations and structure and the logic of spatial differentiation of the renter farming in Korea. The renter farming has transformed its spatial structure from zonal to Thunen's rings-like pattern. This study also suggests that the spatial characteristics of the renter farming has been changed from the ecological and the tenantable to the economical and commercial. Although there is no single logic full explanation the order of such spatial differentiations, the logic of industrialization or neoclassical economics seems to be most effective.

• Tunnel and Underground Space
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• v.24 no.5
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• pp.335-343
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• 2014

Room-and-pillar mining method is one of the most popular underground mining method in the world. If the room-and-pillar mining method is able to be adopted in civil works, it would be highly probable to reduce underground construction costs and to expand a underground structure in use. Therefore, this study aims to analyze the design procedure of unsupported rock pillars which are indispensable to ensure the stability of a room-and-pillar underground structure. Parametric studies on their key design parameters are also carried out for 125 different kinds of design conditions. From the study, the width of a rock pillar is found to show a linear relationship with its corresponding safety factor. The safety factor of a unsupported rock pillar decreased drastically like a negative exponential function as the ratio of room width to pillar width increases in the same rock strength condition. Based on the parametric studies, a design chart to simply evaluate the geometric design parameters of a unsupported rock pillar satisfying a design safety factor is also proposed in this study.

• Journal of Korean Tunnelling and Underground Space Association
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• v.15 no.6
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• pp.585-597
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• 2013

In this study, in order to evaluate stability of the room-and-pillar underground structure, a series of preliminary numerical analyses were performed. Design concept and procedure of an underground structure for obtaining a space are proposed, which should be different from structural design for the room-and-pillar in mine. With assumed material properties, a series of numerical analyses were performed by varying size ratios of room and pillar and then the failure modes and location at yielding initiation were investigated. From the results, relationship between the ratio of pillar width to the roof span (w/s) and overburden pressure at failure initiation shows a relatively linear relation, and the effect of w/s on structural stability is much more critical than the ratio of pillar width and height (w/H) which is a crucial parameter in design of the room-and-pillar mining. It means that roof tensile failure and shear failure at shoulder and pillar are necessary to be considered together for confirming overall structural stability of the room-and-pillar structure, rather than considering the pillar stability only in mining. Failure modes and location at failure initiation were varied with respect to the ratio of room and pillar widths. Therefore, it is necessary to simultaneously consider stability of both roof span and pillar for design of underground structure by the room-and-pillar method.

• Korean Journal of Legislative Studies
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• v.23 no.2
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• pp.67-108
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• 2017

How well citizens are represented by their representatives holds critical importance in representative democracy. While previous studies of ideological congruence have largely focused on Western established democracies, there was not as much attention paid to young democracies including, South Korea. This article investigates ideological congruence in South Korea based on multiple survey data sources collected from 2002 to 2016. When it comes to unidimensional Left-Right ideology, the distance between citizens and governments, unlike its citizen-assembly counterpart, has widened since 2000 sending a negative signal to the norm of representative democracy. As to multidimensional issue positions, however, it turns out that ideological congruence in South Korea has varied along issues such as aids to North Korea and Welfare spending. These results provide both citizens and parties with some important implications. For citizens, they are required to distinguish which party or candidate is more representative of the issue they value the most beyond a simple Left-Right line; for parties, they are required to deal with how to represent their supporters as well as today's increasing independents by strengthening their organizational capacity and providing effective party programs.

• Journal of the Korean Geographical Society
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• v.50 no.1
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• pp.123-139
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• 2015

This paper attempts to complement the methodological and conceptual lack of spatial thinking in Korean women's movement research and to facilitate further discussion on this field of research, by drawing on recent academic discussion on scale developed particularly among the Western critical and feminist geographers. The purposes of the paper are following. First, it addresses the need to utilize the concept of scale in women's movement research. Numerous spatial metaphors often proliferated with indiscretion in the feminist approach have rather tended to hinder fully understanding the spatiality of social movements. In order to examine the spatiality of social movements as both conceptual tool and praxis, not merely as metaphor, the paper incorporates main issues in recent scale discourses with particular attention to the debate between Marston and Brenner, and explores their implications for women's movement research in Korea. Second, it emphasizes the multi-scalar approach by highlighting the role of micro-scale, the less studied side in social movement literature. The public and the private divide, the long time battle ground in feminist research, is often intermingled with the hierarchical scalar understanding which considers the global as more powerful and important than the local. The reproductive realm, however, is indispensably related to production and political economic realm. The paper explores the very site where both the public/private divide and the hierarchical scalar understanding can be dismantled. It is the site where the private becomes public and the local becomes the global (and vice versa). Drawing on a brief example of an anti-FTA movement of women with strollers in Korea, it examines the way the multi-scalar approach advances the understanding of Korean women's movement.

• Journal of the Korean association of regional geographers
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• v.5 no.1
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• pp.77-90
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• 1999

This paper aims to understand the changing characteristics of the Kumi region as a locality in Korea through the regional geography of the world-system approach. To illustrate the changing regional characteristics, we analyzed the economic characteristics or position of the Kumi region within the world-economy and its spatial structure with three divisions of Korean capitalist periods: the Japanese colonial period ($1910{\sim}1945$), the social chaos period ($1945{\sim}1960$), and the economic development period ($1960{\sim}$present). In the Japanese colonial and social chaos periods, as Korean society was incorporated into the peripheral zone within the world-System (world-economy), Kumi also was made into a peripheral agricultural area. As a result, the Kumi region shaped the rural spatial structure without an urban center or regional dominant center. In the development period, influenced by the manufacturing-centered economic policy which boosted Korea as a semi-periphery within world-economy, Kumi also was developed into an industrial region(or semi-periphery) with the establishment of the Kumi electronic and textile industrial complex. This industrialization transformed the rural spatial structure of Kumi into a core (urban center)-periphery (rural area) structure. As we identified above, the regional geography of the world-system approach turned out to be a useful methodology to study a locality or internal region. Therefore we should make efforts to study such regions through the regional geography of the world-system approach.

• Journal of Korea Entertainment Industry Association
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• v.14 no.1
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• pp.41-49
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• 2020

Narrative activities are closely related to the space where human beings live and their awareness of space. In the film Parasite (2019), Director Bong Joon-ho demonstrated his unique insights into the spatial layout of the city. He not only built opposing up and down spaces with clear differentiation of distinct classes, but also conducted complex and smooth narratives in space. Bong Joon-ho used realism to express differences and some unresolvable contradictions between the classes in capitalist society by showing the daily lives of people living in different spaces. This present research focuses on Bong Joon-ho's spatial narrative in the film Parasite, hoping to observe the relationship between characters and between social classes, further exploring Director Bong Joon-ho's spatial narrative awareness and his film creation style. The research reveals that space, an important element of film narrative, has been paid attention to in the film Parasite and space is the narrative's foundation in this film. The narrative of film space is not limited to physical space but also refers to the relationship between characters and the society in which they live, showing metaphorical significance. This film transcends a genre film, portraying the changes of social classes in the development of the society. The film as a whole is one combining ideology and artistry. Every viewer can feel resonated from this film and understand the thought-provoking social situation.

• Korean Institute of Interior Design Journal
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• v.13 no.2
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• pp.80-90
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• 2004

Scientism is a kind of paradigm since the birth of Modernism. Architectural design was also effected from scientism in the 1st Machine age, and being effected still In the End Machine age. But many architects in the 2nd Machine age express scientism in architectural design as a "science for kick" as SF. The design of Rem Koolhaas follows the line of Modernism which was effected from scientism in many ways. However he shows modified machine aesthetics as SF pataphysics mixed with literary imagination, and now shows new science paradigm in post-modern age. He expresses many new science theory like indeterminacy theory, chaos, catastrophe theory in his works. And those are expressed as indeterminate program that proceeds in non-linear way, rhizome in space, order out of chaos, topological metamorphosis as a catastrophe. This study analyzes the expression of scientism in architectural design of Rem Koolhaas since 1970s.nce 1970s.