95 research outputs found
The City Image in Yeom Sang Seobs Novels
No full text이 글은 식민지시기 염상섭 소설이 재현하고 있는 도시 이미지의 총체성을 분석하는 것을 목적으로 한다. 염상섭은 서울 토박이 작가로서, 경성 도시공간을 적극적으로 활용하는 소설을 다수 남겼다. 사랑과 죄, 광분, 삼대, 무화과등의 장편소설은 경성 전역을 배경으로 하여, 도시공간의 입체적 면모를 보여주고 있다. 우선 염상섭은 인종적으로 분할되어 있는 심상지리를 넘어 실제적
인 경성 이미지를 그렸다. 그는 일본인 거주지역인 남촌, 조선인 거주지역인 북촌이라는 공간분할에 매이지 않고, 북촌 속에 존재하는 일본인, 그리고 남촌 속에 존재하는 조선인 등(심상지리적 차원에서) 타자의 공간에 진입한 인물들을 묘사했다. 이를 통해 경성이 지니고 있는 본래의 복잡성을 바르게 표현할 수 있었다. 그리고 염상섭은 서로 다른 두 계급을 연애관계를 통해 연결시킴으로써, 서로 다른 사회적 공간들을 전체적으로 포착했다. 그는 계급적인 격차를 지리적인 거리로 환산시키는 수법을 사용했다. 이때 계급적⋅신분적인 격차를 지닌 연인들은, 지리적으로도 멀리 떨어져 있는 것으로 표현되었다. 즉 염상섭은 멀리 떨어져 있는 계급을 연결시킴으로써, 멀리 떨어져 있는 사회적 공간들을 전체적으로 묘사했다. 이를 통해 염상섭은 도시의 총체성을 재현하는 데 성공할 수 있었다. 이는 염상섭이 도시의 여러 장소들을 더 많이, 더 빈번하게 다루었다는 의미에 국한되지 않는다. 염상섭은 도시의 일부, 혹은 파편(fragment)을 넘어서, 도시의 총체성(totality)를 재현하는 데 성공했다. 지도를 활용하는 문학지리(literary geography)의 방법을 사용하여 이를 증명하도록 하겠다.This paper aims to analyze the totality of the city image presented in Yeom Sang Seobs novels. Yeom, as a Seoul born author, wrote a number of work depicting various city areas in Seoul. Love and Sin, Rampage, The Three Generations, and Fig show the multi-dimensional faces of Seoul and its bottomless depths. Firstly, Yeom draws an actual city image of Seoul rather than the imagined geography divided by ethnicity. In the colonial period, the idea of the southern village (namchon, the Japanese district) and the northern village (bukchon, the Korean district) was commonly accepted. These geographical names suggest that Seoul was actually divided and that it was difficult to traverse to the other side as it was intuitively split. Yeom, however, did not fence himself with such imagined geography. He shows that the division was not absolute. He focused on the Japanese living in the north, and Koreans dwelling in the south. As a result, his works make manifest the complexity of city spaces. Secondly, Yeom combined distant classes and its social spaces. By doing so, he managed to unveil the whole city. In his novels, heros and heroines are geographically distant from each other. Furthermore, their economical and class status are also very different. In this case, the distance between one another reflects their social difference. It makes us see the city as a whole. This is because that two halves (two different classes and also two different spaces) are combined. Yeom is thus successful in representing the totality of the city space. This is not only because he wrote about more places than other writers; rather than depicting only a part of the city or the city in fragments, he represented the totality of Seoul. This paper aims to demonstrate this point by using maps and methods of literary geography
Nanofluidics and microfluidics : systems and applications / Shaurya Prakash and Junghoon Yeom.
No full textengineering bookfair2015Includes bibliographical references and index.xvii, 294 pages :To provide an interdisciplinary readership with the necessary toolkit to work with micro- and nanofluidics, this book provides basic theory, fundamentals of microfabrication, advanced fabrication methods, device characterization methods and detailed examples of applications of nanofluidics devices and systems. Case studies describing fabrication of complex micro- and nanoscale systems help the reader gain a practical understanding of developing and fabricating such systems. The resulting work covers the fundamentals, processes and applied challenges of functional engineered nanofluidic systems.-- Source other than Library of Congress
Effects of Exhaust Throttling on Engine Performance and Residual Gas in an SI Engine
No full textThe author would like to thank CERC (Combustion Engineering Research Center), KAIST for the financial support
Zoology of domain walls in quasi-2D correlated charge density wave of 1T-TaS2
No full text© 2021, The Author(s).Domain walls in correlated charge density wave compounds such as 1T-TaS2 can have distinct localized states which govern physical properties and functionalities of emerging quantum phases. However, detailed atomic and electronic structures of domain walls have largely been elusive. We identify using scanning tunneling microscope and density functional theory calculations the atomic and electronic structures for a plethora of discommensuration domain walls in 1T-TaS2 quenched metastably with nanoscale domain wall networks. The domain walls exhibit various in-gap states within the Mott gap but metallic states appear in only particular types of domain walls. A systematic understanding of the domain-wall electronic property requests not only the electron counting but also including various intertwined interactions such as structural relaxation, electron correlation, and charge transfer. This work guides the domain wall engineering of the functionality in correlated van der Waals materials.11Nsciescopu
준고전적 블랙홀의 동역학과 정보손실문제
No full text학위논문(박사) - 한국과학기술원 : 물리학과, 2011.2, [ xii, 173 p. ]In this thesis, the author studies the information loss problem using semi-classical black holes. If a black hole loses information after evaporation, it will imply the violation of unitarity and predictability. Therefore, to understand the nature of the Theory of Everything and to reconcile the quantum theory and gravitation, we need to understand the problem of the information loss.
If we assume that there exists a unitary theory of quantum gravity as a working hypothesis, the area of a black hole is proportional to the statistical entropy of the black hole, and there is an observer who can see information from Hawking radiation, then it is inevitable to accept black hole complementarity. However, if there is an observer who can see both information of inside and outside, i.e., if the duplication experiment is possible, then black hole complementarity will be violated.
A duplication experiment and other thought experiments can be investigated by semi-classical backgrounds. In this thesis, we focus on three subjects: gravitational objects of Einstein gravity with renormalized energy-momentum tensors, gravitational objects of modified theories of gravity, and initial conditions which can be prepared by quantum tunneling. To study such subjects, we use the following techniques: traditional analytic approaches, numerical approaches using the double-null formalism, and Euclidean analytic continuations.
We study a possibility of a duplication experiment in a charged black hole and a regular black hole. Causal structures allow the possibility; but to regularize curvatures around the inner horizon, we require a sufficiently large number of massless fields which contribute to Hawking radiation. In fact, if we assume the large number, we can violate black hole complementarity even for neutral black holes. The required number of fields can be reduced to a reasonable amount; although we need a large number, if it is finite, the number may be allowed by a model of quantum...한국과학기술원 : 물리학과
Atomic structures of self-assembled epitaxially grown GdSi2 nanowires on Si(001) by STM
No full textSelf-assembled rare-earth (RE) silicide nanowires (NWs) on semiconductor surfaces are considered as good candidates for creating and investigating one-dimensional electron systems because of their exceptionally anisotropic growth behavior and metallic property. While detailed atomic structures are essential to understand electronic properties of these NWs, there have been only few successful observations of atomic structures with microscopy and reliable structure models are lacking. Here, we reinvestigate gadolinium silicide NWs with high resolution scanning tunneling microscopy (STM). We observe several different structures of Gd silicide NWs depending systematically on their widths, which consist of two distinct structural elements along the wires. The structure of a wide wire can be understood from that of a two dimensional silicide. Based on these STM observations, we propose new structure models of Gd silicide NWs. © 2019, The Author(s
Emergent honeycomb network of topological excitations in correlated charge density wave
No full text© 2019, The Author(s).When two periodic potentials compete in materials, one may adopt the other, which straightforwardly generates topological defects. Of particular interest are domain walls in charge-, dipole-, and spin-ordered systems, which govern macroscopic properties and important functionality. However, detailed atomic and electronic structures of domain walls have often been uncertain and the microscopic mechanism of their functionality has been elusive. Here, we clarify the complete atomic and electronic structures of the domain wall network, a honeycomb network connected by Z3 vortices, in the nearly commensurate Mott charge-density wave (CDW) phase of 1T-TaS2. Scanning tunneling microscopy resolves characteristic charge orders within domain walls and their vortices. Density functional theory calculations disclose their unique atomic relaxations and the metallic in-gap states confined tightly therein. A generic theory is constructed, which connects this emergent honeycomb network of conducting electrons to the enhanced superconductivity11sciescopu
Stacking and spin order in a van der Waals Mott insulator 1T-TaS2
No full textQuasi-two-dimensional charge density wave system of 1T-TaS2 has attracted recent interest due to topological excitations, emergent superconductivity, ultrafast synaptic functionality, and the possibility of a quantum spin liquid state. While electron correlation has been known to be essential in this system, the nature of its insulating phase is currently under debate. Here, we reinvestigate the origin of the insulating band structures of the 1T-TaS2 surface using density-functional theory calculations to consider the recently-raised issues such as interlayer coupling, surface effect, and interlayer spin ordering. We identify four distinct electronic states of the surface layer such as a 2D Mott phase, a strongly-coupled antiferromagnetic insulator, a weakly-coupled ferromagnetic insulator, and a small-gap semiconductor, depending on types of the surface termination and the interlayer spin configuration. These distinct surface electronic states explain the different sizes of spectroscopic band gaps observed in scanning tunneling microscopy, revealing the complexity of the interlayer charge and spin couplings in layered correlated materials. © 2023, The Author(s).11Nscopu
Comparative metabolic profiling of posterior parietal cortex, amygdala, and hippocampus in conditioned fear memory
No full textFear conditioning and retrieval are suitable models to investigate the biological basis of various mental disorders. Hippocampus and amygdala neurons consolidate conditioned stimulus (CS)-dependent fear memory. Posterior parietal cortex is considered important for the CS-dependent conditioning and retrieval of fear memory. Metabolomic screening among functionally related brain areas provides molecular signatures and biomarkers to improve the treatment of psychopathologies. Herein, we analyzed and compared changes of metabolites in the hippocampus, amygdala, and posterior parietal cortex under the fear retrieval condition. Metabolite profiles of posterior parietal cortex and amygdala were similarly changed after fear memory retrieval. While the retrieval of fear memory perturbed various metabolic pathways, most metabolic pathways that overlapped among the three brain regions had high ranks in the enrichment analysis of posterior parietal cortex. In posterior parietal cortex, the most perturbed pathways were pantothenate and CoA biosynthesis, purine metabolism, glutathione metabolism, and NAD+ dependent signaling. Metabolites of posterior parietal cortex including 4′-phosphopantetheine, xanthine, glutathione, ADP-ribose, ADP-ribose 2′-phosphate, and cyclic ADP-ribose were significantly regulated in these metabolic pathways. These results point to the importance of metabolites of posterior parietal cortex in conditioned fear memory retrieval and may provide potential biomarker candidates for traumatic memory-related mental disorders. © 2021, The Author(s).1
- …
