• Proceedings of the Korean Information Science Society Conference
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• 2001.04b
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• pp.208-210
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• 2001

예외자는 공간색인의 성능을 떨어뜨리는 요소가 될 수 있다. 예를 들어, R-tree 계열의 색인 방법은 예외자 때문에 MBR의 넓이나, MBR사이의 겹치는 공간이 넓어져 성능이 떨어진다. 따라서, 공간색인을 구축할 때, 적절하게 예외자를 처리하면 성능을 향상시킬 수 있다. 본 논문에서는 예외자와 공간색인의 성능과 관계를 관찰하고 적절한 방법으로 예외자를 처리하여 공간색인의 성능을 향상시키는 방법을 확인한다. 실험의 결과에 따르면, 예외자를 적절하게 처리할 경우 성능을 평균적으로 15% 향상시킬 수 있다.

• Spatial Information Research
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• v.12 no.4 s.31
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• pp.339-349
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• 2004

Outliers in spatial databases uuluence on the performance of spatial indexing methods including R-tree. They enlarge the size and overlapping area of MBRs in R-tree which are important factors in determining the performance. In this paper, we give an analysis of outlier effects on R-tree by analytical and experimental work, and propose a method for properly handling outliers. Our experimental results show that our method improves about 15 percents of the performance.

• Journal of the Korean association of regional geographers
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• v.23 no.2
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• pp.269-287
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• 2017

While Jeju Free International City was promoted to overcome the economic crisis and build a new national competitiveness in the era of globalization, its development vision as 'the hub city of Northeast Asian economy in the $21^{st}$ century' has not been realized. This paper argues that Jeju Free International City to aim for the 'ideal free market model', 'neoliberal space of exception', and 'a new testing ground for neoliberal deregulation policies' has failed due to worsening of socioeconomic and environmental contradictions, growing conflicts in local community, and the logic of equity enforced by the central government. To support this claim, this article reviews the theoretical discussions of special economic zones, examines the shifts in the development visions of Jeju Free International City, and analyzes how Jeju has become a space of exception with the introduction of various exceptional policies and spatial mechanisms.

• Journal of the Economic Geographical Society of Korea
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• v.20 no.3
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• pp.267-286
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• 2017

The main purpose of this paper is to identify the spatiality of North Korea and China border regions through investigating the exceptional characteristics of the regions with the concept of positionality, which allows us to realize the relative position between subject and object. Border regions could be identified appropriately by considering the concept of switching positionality, as it is a kind of multiple space in which its sudden closure and opening should be configured in accordance with geopolitical and geoeconomic changes centering around border line. The main arguments of this research concerned with border regions with the concept of switching positionality are fallen into three. Firstly, changes in border regions should be analyzed by investigating more broader contexts and conjunctural perspectives, and even an internal condition stemmed from locality. Secondly, trajectories of border regions could be analyzed by the assemblages of various powers. Finally, the positionality of economic actors should be examined by identifying dynamic relations between geoeconomics and geopolitics. In particular, the concept of positionality has led to a number of insights into discussions on time-space, and spatiality in relational-dialectical, socio-spatial, and power-topological perspectives. Based upon this concept of positionality, the research has identified exceptional characteristics in North Korea and China border regions. It argues that the exceptionality of the region has stemmed from the intersection between the unstability of geopolitical security and various geoeconomic benefits.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2003.11a
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• pp.133-134
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• 2003

도시지역에서 관찰되는 대기오염현상은 거의 예외 없이 대단히 복잡한 양상을 띈다. 그 결과 모델링을 통하여 도시지역의 대기오염현상을 정확히 묘사하는 것은 매우 어렵다. 주가변동, 기상변화 등의 다양한 시간(/공간) 스케일을 지니는 복잡한 현상도 충분히 긴 시간(/ 공간)에 대해 평균을 칠할 경우 일반적으로 비교적 단순한 경향을 보인다. 1990년부터 2001년까지 서울지역에 대한 관측자료를 분석해본 결과, 대기오염현상 역시 예외는 아닌 것으로 나타났다. (중략)

• The Journal of the Korea Contents Association
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• v.11 no.12
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• pp.597-610
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• 2011

In database application developments, data coexists in memory and disk spaces. To manipulate the memory data, the general programing languages are used and to manipulate the disk data, SQL is used. In particular, the procedural languages for the memory manipulation are difficult to create and manage than declarative languages such as SQL. Thus, this paper shows that a particular structure of memory data, tree structured, can be manipulated by SQL. Most of all, the model data of the user interfaces can be represented by a tree structure and thus, it can be processed by SQL except non set computations. The non set computations could be done by helper classes. The SQL memory data manipulation is more suited to the database application developments which have few complex computations.

• The Journal of the Korea Contents Association
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• v.11 no.1
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• pp.16-25
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• 2011

Some context is characterized by a single event in computing environment, but many other contexts are determined by a lot of things which occur with a space and a time. The Realtime Embedded System context-awareness service that interacts with the physical space can have property such as time. The exceptional behaviors of the system that interact with physical space can result in critical damage and cause danger to the operation of an embedded system. we propose an approach which should include spatio-temporal property and exceptional management in the context model, and verify its effectiveness using an expanded Petri-Net. The context-awareness service modeling of an embedded system is discussed the properties of model such as basic Petri-Net, patterned Petri-Net, or Spatio-temporal Petri-Net for the exceptional behaviors of the system. The proposed methodology demonstrated using an example that is emergency medical service. The use of expanded Petri-Net will contribute not only to develop the application but also to model the spatio-temporal context awareness for the exceptional handling.

• Journal of the Korean association of regional geographers
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• v.23 no.2
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• pp.288-310
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• 2017

This paper aims to provide a conceptual framework to see the special zones in East Asia in relation to the territorialities of the state. For this, it will introduce Aihwa Ong's notion of 'spaces of exception', and provide some critical discussions on it. Unlike Ong, I do not see the spaces of exception as an outcome of neoliberal changes of the state. Instead, I propose to see the special zones in terms of the internal limitations of the modern state territoriality. In particular, I try to theorize the special zones in relation to the dialectics of the contradictory relations between mobility and fixity inherent in the territoriality of the modern nation state. In addition, it will be suggested to see special zones as an essential part of the spatiality of the East Asian developmental states, given the spatio-temporal contexts of the East Asian capitalist development. On the basis of these theoretical discussions, this paper will divide the special zones that have been developed in East Asia since the 1960s into 3 different types, including 1) developmentalist special zones, 2) neo-liberal special zones, and 3) special zones for transition, and discuss their characteristics.

• Proceedings of the Korea Contents Association Conference
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• 2019.05a
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• pp.119-120
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• 2019

이 글은 물질의 본질로 규정한 아리스토텔레스의 색채론과 디지털이미지의 비물질적 특성으로서의 검정을 전제로, <신과 함께>의 서사를 주도하는 인물과 이미지를 구성하는 공간에 채워진 검정의 의미를 분석한다. 할리우드영화에서 검정은 악의 근원이며 공포이다. 검정에 관한 예외적이고 특별한 특성을 성찰하는 철학, 회화, 문학에서의 비유와 달리, 대중영화에서 검정은 가장 보편적인 의미를 표현한다. 삶과 죽음의 경계를 오가는 <신과 함께>에서 검정은 저승의 공간과 차사라는 인물을 구성한다. 한국영화에서 검정은 상상의 공간을 상징화하는 유용한 색이다. 이 글은 한국영화 <신과 함께>에 사용된 검정을 통해 동서양 색채문화의 차이를 살펴보고, 사회문화적 맥락에 따라 상호작용하는 의미를 분석한다.

• Journal of the Korean association of regional geographers
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• v.22 no.2
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• pp.307-330
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• 2016

This article aims to explain how Gangnam, as a model and standard of compressed urbanization in South Korea, was created. Gangnam and Gangnam-style urbanization need attention not only because they contrast with Korea's urbanization in the past as well as urbanization in the West but also they provide an important model in contemporary Korea's politics, economy and culture. However, there are little studies of how Gangnam's peculiar urbanism was created. To fill this gap, this article will first capture Gangnam's peculiar urbanism as a material landscape and sociocultural lifestyle. Gangnam-style urbanism is (a) materially characterized by high-rise apartment complexes owned by the middle and upper class for dwelling and asset growth and (b) socio-culturally characterized by political conservatism, public indifference, competition over academic performance, appearance, and fashion, and nightlife. Then it will show Gangnam's archetype was created in a spatially and temporally compressed way in and through the spatial selectivity of Korean anti-communist authoritarian developmental state strategies: (1) anti-communism led to the diffusion and accommodation of the population through apartments in Gangnam in the context of its confrontation with North Korea and the fast-growing population of Seoul; (2) military authoritarianism excluded the low-income class and the urban poor from urban development; and (3) the developmental state adopted selective housing policy which treated construction companies and the middle class preferentially through exceptional zoning and price distortions, promoting the construction of apartment in Gangnam and its resultant uneven development.