• The Bulletin of The Korean Astronomical Society
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• v.40 no.1
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• pp.45.2-45.2
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• 2015

우리는 최근 현대천문학의 가장 오래된 난제로 우리은하 헤일로의 형성과 깊은 관련이 있는 구상성단계의 오스터호프 이분법이 다중항성종족 패러다임 하에서 76년 만에 완벽히 규명되는 것을 발견하였다. 또한 이 연구의 기본 개념을 우리은하 벌지에 적용한 결과, 기존 국제학계의 이론과 완전히 다른 벌지의 형성기원에 대한 새로운 해석에 도달하였다. 우리은하의 벌지에 대한 대규모 측광 서베이 분석으로부터 double red clumps가 있다는 것이 2010년에 발견되었고, 이는 디스크와 바 불안정에 기인하는 은하중심부 X-shape 구조의 증거로 널리 받아들여지고 있다. 그러나 우리는 이와 같은 국제학계의 해석이 수평계열성의 항성진화이론을 간과한데서 비롯된 허구일 가능성을 제시하고자 한다. 우리의 모델에 의하면 관측된 double red clumps는 Omega Cen을 포함하는 대다수의 구상성단에서 발견되는 것과 동일한 헬륨함량이 증가된 2세대 별들(G2)에 의한 효과이다. 우리은하 벌지에 위치한 Terzan 5 구상성단처럼, 중원소함량이 높은 벌지에서는 G2에 해당하는 수평계열성들이 광도가 약 0.5등급 더 밝은 red clump 위치에 놓이게 되어 자연스럽게 double red clumps를 형성하게 된다. 앞으로 우리의 새로운 해석이 Gaia에 의한 삼각시차 거리결정으로 확인된다면, 이는 우리은하 벌지를 이루는 대부분의 별들이 Terzan 5와 같은 윈시 빌딩블럭들의 합병과 붕괴에 의해 형성되었다는 것을 암시하여, 우리은하는 물론, 조기형은하의 형성기원 연구에 큰 전환점이 될 것으로 기대한다.

• The Journal of the Korea Contents Association
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• v.7 no.8
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• pp.41-49
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• 2007

BCI system integrates control or telecommunication system with generating electric signals in scalp itself after signal acquisition. This system detect a movement of EEG at real time, can control an electron equipment using a generated signal through EEG movement or software-based processor. In this paper, we deal with removing and separating artifacts induceced from measurement when brain-computer interface system that analyzes recognizes EEG signals occurred from various mental states. In this paper, we proposed a method of EEG classification and an artifact interval detection using bisection mathematical modeling in the EEG classification process for BCI system implementation.

• Journal of the Economic Geographical Society of Korea
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• v.24 no.1
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• pp.52-75
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• 2021

The current Korean labour movement is at an impasse that is partly sustained by the idea of "strong" transnational corporations (TNCs) versus "weak" labour, and this perception is based on the "global-local dichotomy," wherein TNCs are depicted as abstract and structured entities operating at the global scale and workers are represented as having a concrete and weak presence within the local sphere. As an alternative perspective to break this "global" capital vs. "local" labour dichotomy, I focus on labour geography, which assumes that labour is not simply a factor of production but a sentient spatial actor that (un-)intentionally produces the landscape of capitalism. Borrowing insights from the multi-scalar perspective, this paper aims to understand the actual methods in which workers utilize spatial strategies through an empirical case study of the Nestlé Korea labour union strike in 2003. Based on this case study, this paper claims that workers are both capable of employing coordinated multi-scalar practices and can be more influential to the economic geographies of TNCs. Additionally, it suggests that workers' scalar practices are actually more complicated and multi-directional as a result of their complex and dynamic interactions with political, economic and cultural forces and actors at diverse geographical scales.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1995.04b
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• pp.157-163
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• 1995

This paper presents an algorithm to deternine the tool path height for rough machining of sculptured surface. To minimize rough machining of sculptured surface, it is necessary to determine the tool path heights of contour planes. the proposed algorithm searches for the height at which maximum metal removal rate is obtained. This bisection method is accomplished until all shoulder heights are within roughing tolerance. The machining experiment demonstrates the superiority of the algorithm presented in this thesis.

• 대학교육
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• s.72
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• pp.86-93
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• 1994

역사상 지식인과 국가권력을 포함한 모든 권력과의 갈등은 결국 이러한 권력이 허용하는 자유의 한계를 확장하려는 움직임이었고, 이렇게 볼 때에 지식인과 국가권력을 위시한 모든 형태의 권력 사이에는 결국 긴장이 놓여질 수밖에 없다. 이러한 지식인과 국가권력의 불편한 관계는 국가와 사회의 이분법을 극복하였다고 하는 현실 사회주의에서도 예외는 아니었다. 그러나 지식인과 국가 사이에 적당한 긴장관계가 나타나고 있는것은 오히려 그 사회가 건강하다는 징표로 삼을 수 있는 것이지, 어느 사회에 지식인과 국가 사이에 완전한 조화가 이루어졌다고 주장하는 것은 그 사회의 진정한 성격에 관해서 의심하지 않을 수 없게 만드는 것이다.

• The Journal of the Acoustical Society of Korea
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• v.40 no.2
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• pp.109-120
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• 2021

This paper proposes the H∞ norm based data association gate method to apply robustly the data association gate of passive sonar automatic target tracking which is on non-linear targets in dense cluttered environment. For target tracking, data association method selects the measurements within validated gate, which means validated measuring extent, as candidates for the data association. If the extent of the validated gate in the data association is not proper or the data association executes under dense cluttered environment, it is difficult to maintain the robustness of target tracking due to interference of clutter measurements. To resolve this problem, this paper proposes a novel gating method which applies H∞ norm based bisection algorithm combined with 3-σ gate method under Gaussian distribution assumption and tracking error covariance. The proposed method leads to alleviate the interference of clutters and to track the non-linear maneuvering target robustly. Through analytic method and simulation to utilize simulated data of horizontal and vertical bearing measurements, improvement of data association robustness is confirmed contrary to the conventional method.

• The Journal of the Korea Contents Association
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• v.21 no.12
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• pp.713-727
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• 2021

This paper want to examine how Gwanghwamun and its surrounding areas work in the cinematic spaces for Korean films of the 1950s-2010s. First, in Korean films of the 1950s-1960s, Myeong-dong(Namchon), Bukchon, Seochon, and Dongchon are the primitive, perceptual, existential spaces that show the underground world and tragic pathos in the splendid city through intense desires and fatal frustration, the shadows and conflicts of modernization. Second, in Korean films of the 1970s-1990s, Myeongdong·Jongno(Namchon·Bukchon), Seochon and Dongchon are the perceptual, existential spaces that show public revenge and private alienation through the dichotomy of freedom/evil and the dichotomy of wealth/poverty. Third, in Korean films of the 2000-2010s, Gwanghwamun(Seochon), Bukchon, Namchon, and Dongchon are the perceptual, existential spaces that show civil society ethos and gloomy requiem through national agendas, resistance movements, desires and losses, miserable reality and death.

• Korean Association of Arts Management
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• no.51
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• pp.167-190
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• 2019

Copyright law has functioned to certify the authorship and artistic identity of an artist as well as to remunerate the artist's labor in monetary terms. However, the legal stability of copyright law may be questioned and even challenged because it shares the ground with unfixed notions of the concept of art. This study is an attempt to find theoretical argument where such instability of copyright law stems from, by looking into the theories of Aesthetics and history of arts. The first argument builds up on the ambiguity of discriminating between the Aesthetic concept of expression and idea. The second argument illuminates how new conventions of creating art work and emerging ideals of making art prevents to accommodate copyright law in the fields of art. New art forms such as conceptual art and place specific art are such examples. Increasing role of public arts projects also questions the conventional adoptions of copyright law. Arts management is closely related with this phenomena since their job is to administer the complex situation of introducing artists to the knowledge of copyright law.

• Proceedings of the Acoustical Society of Korea Conference
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• autumn
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• pp.383-386
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• 1999

이 논문은 한국어 파열연자음이 유성음 환경에서 유성음화하는 현상을 운율구조와 관련해서 음향음성학적으로 고찰하는 것을 목적으로 한다. 이 논문에서는 첫째, 음성적 자질로서나 청각적인 판단에 의해서나 무성음과 유성음의 이분법으로 나뉘는 것을 음향적 고찰을 통하여 각각을 하위의 범주로 나누었다. 문장 안에서 파열연자음이 음향적으로 실현될 때 각각의 범주가 어느 정도의 빈도수로 출현하는지를 살펴보았다. 둘째, 한국어 파열연자음은 어절 초에서는 무성음으로 실현되나 앞뒤에 유성음이 오는 경우에는 유성화되는 음운규칙이 있는데, 음향적인 분석을 통하여 앞뒤에 유성음이 온다는 조건만으로 설명할 수 없는 예들을 발견하였다. 그리하여 인접음절(특히 앞음절에 오는 분절음의 특성)과 운율구조(액센트구 내에서의 위치, 억양구경계의 유무)를 함께 고려하는 파열연자음 유성화규칙의 조건을 제안하였다.

• The Transactions of the Korean Institute of Electrical Engineers B
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• v.55 no.6
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• pp.306-313
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• 2006

A three dimensional adaptive finite element refinement algorithm is developed for non-linear magnetostatic field problems. In the method, the edge elements are used for finite element formulation, and the local error in each element is estimated from the fact that the tangential components of magnetic field intensity and the normal components of magnetic flux density should be continuous at the interface of the two adjacent elements. Based on the estimated error, the elements which have big error are divided into several elements using bisection method. The effectiveness of the developed algorithm is proved through numerical examples.