머시응고에 대한 속도감쇠 기법이 정상상태 머시영역에 미치는 영향

김우승,김덕수,Kim, Woo-Seung,Kim, Deok-Soo 대한기계학회 1998 大韓機械學會論文集B Vol.22 No.12

In the analysis of a mushy solidification system with natural convection using a fixed grid method, the enthalpy method has been used to account for the release of latent heat. The variable viscosity, Darcy source, and hybrid methods have been employed for the velocity suppression in a mushy region. The choice of the values of solid viscosity and permeability constant in conjunction with the Darcy source term plays an important role in forming the location and shape of the phase boundaries. In this work the effects of these major parameters related to steady-state behavior in the system of mushy solidification are investigated through a simple test problem. The effective specific heat based on the spatial gradients of the enthalpy and temperature is adopted for the treatment of the release of latent heat. The effects of the Prandtl and Rayleigh numbers on the shape of mushy region are examined using the hybrid method.

역해석을 이용한 구형 공간 내의 산란계수 추정에 관한 연구

김우승,곽동성,Kim, Woo-Seung,Kwag, Dong-Seong 대한기계학회 1999 大韓機械學會論文集B Vol.23 No.3

A combination of conjugate gradient and Levenberg-Marquardt method is used to estimate the spatially varying scattering coefficient, ${\sigma}(r)$, in the solid and hollow spheres by utilizing the measured transmitted beams from the solution of an inverse analysis. The direct radiation problem associated with the inverse problem is solved by using the $S_{12}-approximation$ of the discrete ordinates method. The accuracy of the computations increased when the results from the conjugate gradient method are used as an initial guess for the Levenberg-Marquardt method of minimization. Optical thickness up to ${\tau}_0=3$ is used for the computations. Three different values of standard deviation are considered to examine the accuracy of the solution from the inverse analysis.

색칠기법을 활용한 효율적인 그리드 감지도 계산기법

김우승(Woo Seung Kim),김진석(Jin Suk Kim) 한국통신학회 2008 한국통신학회 학술대회논문집 Vol.2008 No.7

러시아의 새로운 정체성 모색 - 세계화인가 유라시아주의인가 -

김우승 ( Woo Seung Kim ) 한국사회역사학회 2006 담론 201 Vol.9 No.3

탈 사회주의 이후 러시아의 체제이행의 가장 큰 특징은 세계 시장경제로의 편입이라는 사회주의 체제와는 전혀 다른 패러다임 속에서 이루어졌다는 점이다. 1992년 이후 ``충격요법``을 기반으로 글로벌 경제 속에서의 생존가능성의 시험은 빈부격차의 확대와 조직범죄 집단을 통한 사적 경제활동의 증가와 부패, 금융-산업 과두체제의 등장과 같은 심각한 경제적 문제와 사회문화적 정체성 혼란만을 가져다 주었다. 이에 따라 옐친이 추진했던 신 자유주의적인 발전전략이 과연 러시아에 적합한 것인가, 그리고 러시아의 발전방향은 과연 어떤 것이어야 하는 가 등에 대한 논란이 지난 1990년대 내내 러시아 지식인들과 정치인들 사이에서 있어 왔다. 사실 이러한 정체성의 문제는 170여년 전 슬라브주의와 서구주의의 논쟁에서 이미 시작된 것이기도 하지만, 탈 사회주의 러시아에서는 세계화의 영향과 그에 대한 러시아의 응전, 즉 아틀란티스주의 대 유라시아주의의 대결로 나타났다. 이 글에서는 세계화에 대한 러시아의 반작용이자 향후 러시아 사회변동의 중요한 가늠자로서 나타나는 신 유라시아주의의 내용과 세계화에 대한 러시아인들의 의식을 살펴보고 러시아의 새로운 사상으로서의 유라시아주의의 발전가능성에 대해 검토한다. Since 1992 the Russian society has gone through a major transformation, almost a revolution. Russia`s recent experience was radical changes in social structure by an exciting new paradigm: the theory of globalization and market system. The strategy developed to globalize Russia was known as perestroika(restructuring), glasnost(openness) and shock therapy. Especially, the objective of shock therapy was, in essence, to create a market economy in Russia as quickly as possible. This was to be achieved by free price and liberalizing trade policies based on neo-liberalization theory. However, the shock therapy and globalization strategy caused economical catastrophe to Russia in 1998. With this radical transformation, most of the Russians have lost their meaningful identity. Was globalization strategy suitable for Russia? Which is the best strategy for development in post-socialist Russia? In reality, the bottom line is the ultimate question of cultural identity for Russians living in Eurasian land and experiencing cultural effects from two continents-Europe and Asia. And it was the argument not only between slavophiles and westernizers in 19th century but between Atlanticism and Eurasianism in current Russia. Furthermore, the predominance of the US as the lone superpower and the role it plays in much of what is called ``globalization`` can create a reaction from Russian people with strong patriotic feelings of their own. Chapter Ⅰ critically reviews the existing arguments about the Eurasianism and suggests the purpose of this study. Chapter Ⅱ retrospects the debate between slavophilism and westernism in 19th century and the classical Eurasianism in 1920`s. Chapter Ⅲ analyzes the neo-Eurasianism as a social, political and intellectual response to globalization in current Russia. Chapter Ⅳ examines the change of socio-cultural attitude about westernization and the direction for the development of Russian society through empirical data by Russian scholars. And chapter Ⅴ recapitulates the previous chapters, and suggests the significance and limitation of the Eurasianism in Russia.

필자약력

김우승(Woo Seung Kim),나인철(In Chul Na),문흥호(Heung Ho Moon),서석흥(Suk Heung Suh),엄구호(Gu Ho Eom),유무재(Mao Cai Liu),유세희(Se Hee Yoo),이재영(Jae Young Lee),이재유(Jae You Lee),정옥경(Ok Kyung Jung),조한범(Han Bum Cho),최종연(Jon 한양대학교 아태지역연구센터 1998 중소연구 Vol.22 No.4

대규모 무선 센서 네트워크에서 게이트웨어 배치와 연결성

김우승(Woo Seung Kim),김진석(Jin Suk Kim) 한국정보과학회 2008 한국정보과학회 학술발표논문집 Vol.35 No.1

본 논문에서는 대규모 무선 센서 네트워크에서 센서 노드와 게이트웨이를 배치하였을 때 연결성의 변화를 살펴본다. 2차원의 감지목표지역에서 정해진 수로 균열 분포 과정으로 배치된 노드들이 게이트웨이에 연결된 노드의 평균 비율을 통해 기대해 볼 수 연결 노드 비율를 확인하고, 이에 따라 적합한 게이트웨이의 수를 확인한다.

Individual metabolite spectral extraction in proton magnetic resonance spectroscopy of the mice brain using deep learning

Woo-Seung Kim(김우승),Yoon-Ho Hwang(황윤호),Dong-Yoon Kim(김동윤) 대한전자공학회 2020 대한전자공학회 학술대회 Vol.2020 No.8

Proton magnetic resonance spectroscopy (1H-MRS) is a noninvasive tool extracting biochemical information from brain. Quantification of metabolites from 1H‐MRS provides brain metabolic status. However, quantification of those concentrations remains a challenging task. Deep learning has been used successfully in magnetic resonance research field for classification, object recognition, noise removal and prediction. To apply deep learning into 1H-MRS quantification, we designed convolutional auto encoders (CAEs) that extract noise‐free, line-narrowed, baseline‐removed metabolite spectra for each degraded spectrum. We simulated data with combination of metabolite on phantom spectra. Also, the simulated data were varied with a wide range of metabolite concentration, SNR, linewidth, phase shift and frequency shift. We used ratios of metabolite concentration divided by total Creatine (tCr) concentration by our proposed method, LCModel and jMRUI. The tCr ratios of fourteen metabolites were within the reported concentration ranges by the proposed method. Our results were similar to LCModel, superior to jMRUI. We believed that deep learning on 1H-MRS has potential applicability not only for humans but al-so for mice spectra.

러시아 지방 소도시 소규모 기업가의 생활양식과 의식구조 - 연해주, 블라디보스톡의 경우 -

김우승 ( Woo Seung Kim ),김태진 ( Tae Jin Kim ),강성희 ( Sung Hee Kang ) 한국사회역사학회 2007 담론 201 Vol.10 No.2

이 연구는 러시아, 연해주의 블라디보스톡을 중심으로 활동하는 소규모 기업가들을 주된 사례로 하여 탈 사회주의 러시아의 지방도시에서 나타나는 소규모 기업가의 계층적 위치와 생활양식 및 의식구조를 설문조사와 현지 심층인터뷰를 바탕으로 분석한 것이다. 블라디보스톡은 러시아의 동쪽 관문이라는 점과 인접하고 있는 중국과의 교류를 통해 극동 러시아의 상업 중심지로서 뿐 아니라, 시베리아 전역으로 상품을 유통시키는 중개지의 역할을 하면서 소규모 기업들이 성장할 수 있었다. 그리하여 블라디보스톡의 소규모 기업은 제조업 보다는 유통 및 서비스업 분야에서 집중적으로 성장하였다. 2006년 현재 연해주 소규모 기업 수는 총 59,129개 인데 이 가운데 60%가 넘는 37,089개 소규모 기업이 블라디보스톡에 자리 잡고 있다. 이들 소규모 기업가들은 스스로를 중간계층이라고 평가하는 주관적 평가(귀속의식)가 상당히 높았으며 생활양식에서 각 계층 사이의 차이는 크게 두드러지게 나타나지는 않았다. 경제의식에서도 시장경제에 대한 만족감과 기업가로서의 자부심, 독립심, 국가로부터의 자율성 등이 강하게 나타나고 있다는 점에서는 자본주의 기업가적 의식과 윤리가 만들어졌다고 할 수 있다. 그러나 다른 한편으로는 여전히 연줄과 혈연, 인맥 등의 비공식적 관계를 가진 사업형태를 가지고 있다는 점에서 완전한 부르주아적 윤리가 만들어진 것은 아니라고 할 수 있다. 또한 이들은 정치의식에서는 거의 대부분 정부 또는 정치에 대한 무관심과 불신이 팽배해 있으며 정책에 대한 비판에 있어서도 대부분 침묵 또는 체념적 성향을 보여 주고 있다. 결론적으로 블라디보스톡의 소규모 기업가들은 소득 측면에서는 러시아의 중간계층 수준이지만 의식적 차원, 특히 정치 의식적 차원에서는 여전히 ``침묵하는 소수``로 남아 있다고 볼 수 있다. 그러나 러시아 중간계층의 경제의식과 정치의식 사이의 이러한 괴리현상을 부정적인 것으로만 간주할 것이 아니라 러시아적인 전통 속에서 만들어져 온 러시아적인 차원에서 분석할 필요성이 있다. This study attempts to analyze the stratification of small entrepreneurs and their life style and consciousness through survey and interviews in Primorie Krai, Far Eastern Russia. Vladivostok is the eastern gate of Russia and is located by border between Russia and China. These geographical factors are the main reasons of the development of this city, and the small entrepreneurs in Vladivostok could be risen by city`s intermediary business - import & export by shuttle traders. Nowadays, Vladivostok has total 37,089 small enterprises - 60% or more of small enterprises in Primorie Krai. There is a little difference in their life style because of not long duration of capitalism. A sense of belonging in the middle strata of small entrepreneurs in Vladivostok is very high, and the level of satisfaction with market economy, self confidence as entrepreneur and self independence are too. But informal relationship in their business blocks up their making the ethics of bourgeoisie. Furthermore, most of them has the least interest in politics and has full distrust against their government and politicians. In conclusion, the small entrepreneurs in Vladivostok remain as a ``silent minority`` on their political level, although they are belonging to middle strata on their economical level.

극동 연해주의 소규모 기업가와 의식구조

김우승(Woo Seung Kim),홍성원(Sung Won Hong),조영관(Young Kwan Jo) 한국아시아학회 2007 아시아연구 Vol.10 No.1

러시아 중간계급 형성과정에 대한 연구

김우승(Kim Woo Seung),홍성원(Hong Sung Won),조영관(Jo Young Kwan),김태진(Kim Tae Jin),강성희(Kang Sung Hee),최성권(Choi Sung Kwon) 한국슬라브유라시아학회 2006 슬라브학보 Vol.21 No.2

During 1990’s, the Russia as a post socialist country has been experienced radical changes in social structure by market system and the globalization. In the course of these global transformation and market system, a unique experiment was carried out over millions of people ? a change in the social stratification and social value system took place on a large scale. The most remarkable result of the these changes is the rising of the middle class. The purpose of this thesis is to analyze the making of the middle class during the period of 1990’s and to evaluate its social significance on the view of the social change. And it is analyzed by own survey and interviews with the small sized entrepreneurs which have done at Moscow in 2003 and 2004. Chapter Ⅰ and Ⅱ critically review the existing arguments about the concepts of the middle class and suggests the purpose of this study. Chapter Ⅲ retrospects the rising and its characteristics of the small sized entrepreneurs in post socialist Russia. Chapter Ⅳ and Ⅴ analyzes the life style and their consciousness of the middle class in current Russia. Finally, chapter Ⅵ recapitulates the previous chapters, and suggests the significance and limitation of the middle class in Russia. The middle class consists of small entrepreneurs, managers and administrators, the upper intelligentsia, and the senior officers in military. Their lifestyle is similar to that of western middle class. As far as work goes, They could be a manager in a successful enterprise, a doctor, lawyer or other professional near the top of her field. And they give their children private music or tennis lessons and they can afford to take a vacation abroad. The results of our survey indicate, neither communist, nor liberal, nor nationalist doctrine dominate in the middle class. In a fundamental way, the majority of the middle class recognizes the unconditional supremacy of democracy and market economy rather than any other models. And the larger part of the middle class is oriented to western values, whereas lower social strata predominantly advocate Russia’s ‘own way’. As a conclusion, the rise of middle class is the product of global market economy and privatization. The current composition of the middle class is largely heterogeneous in terms of social background and social division of labour. And there is no clear evidence of evolving group identity, in terms of the growing self-organization or interaction for the sake of protecting common interests. Everyone relies on his own forces or closest people. With all this in mind, the Russian middle class is not a spectre. Still, it is the silent minority. Furthermore, several generations will be passed before middle class likely western type will be appeared and established, although Russia has been experienced radical changes in social structure by market system and the globalization.