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Transformación Colonial del Pasado Prehispánico
Jongsoo Lee 한국라틴아메리카학회 2015 라틴아메리카연구 Vol.28 No.2
In the typical version of Aztec culture and history, Quetzalcoatl has been described as a symbol of peace and civilization in contrast to other indigenous gods such as Tezcatlipoca and Huitzilopochtli that are associated with human sacrifice and militarism. In this article, however, I argue that the peaceful and civilized image of Quetzalcoatl originated in the colonial period, and later scholars, writers, and painters have simply recycled and further elaborated on this image according to their ideological perspectives. By analyzing the origin and continued use of the colonized image of Quetzalcoatl and then applying this analysis to two specific works of the twentieth century, The Epic of American Civilization, painted by Jose Clemente Orozco, and Terra Nostra, written by Carlos Fuentes, this article demonstrates how Pre-Hispanic indigenous traditions have been colonized from the conquest to the present.
Constrained Minimization Utilizing GA Based Pattern Recognition of Immune System
Jongsoo Lee,Hyuk Park 대한기계학회 2007 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.21 No.5
The immune system has pattern recognition capabilities based on reinforced learning, memory and affinity maturation interacting between antigens and antibodies. The paper deals with the adaptation of artificial immune system into genetic algorithm based design optimization. The present study utilizes the pattern recognition from the immune system and the evolution from genetic algorithm. The basic idea is derived from the fact that designs should be distinguished whether they are usable/feasible or infeasible and should be improved towards the optimal solution. For the expression of design solutions, binary coded strings are used to represent antigens and antibodies in artificial immune system and chromosomes in genetic algorithm. The paper discusses the procedure of constrained optimization that does not rely on any detailed mathematical formulation for constraint handling. A number of mathematical function minimization problems are examined for verification, and practical engineering optimization problems including inequality constraints are explored to support the proposed strategy.
Role of Artificial Neural Networks in Multidisciplinary Optimization and Axiomatic Design
Jongsoo Lee 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
Artificial neural network (ANN) has been extensively used in areas of nonlinear system modeling, analysis and design applications. Basically, ANN has its distinct capabilities of implementing system identification and/or function approximation using a number of input/output patterns that can be obtained via numerical and/or experimental manners. The paper describes a role of ANN, especially a back-propagation neural network (BPN) in the context of engineering analysis, design and optimization. Fundamental mechanism of BPN is briefly summarized in terms of training procedure and function approximation. The BPN based causality analysis (CA) is further discussed to realize the problem decomposition in the context of multidisciplinary design optimization. Such CA is also applied to quantitatively evaluate the uncoupled or decoupled design matrix in the context of axiomatic design with the independence axiom.
Hybrid Transparent Electrodes of Silver Nanowires and Carbon Nanotubes by Plasmonic Welding
Jongsoo Lee(이종수),Ju Yeon Woo,Ju Tae Kim,Byung Yang Lee,Chang-Soo Han 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.11
We report highly transparent and flexible AgNW/SWCNT hybrid networks on PET substrates combined with plasmonic welding for securing ultrahigh stability in mechanical and electrical properties under severe welding at the junction of AgNWs and leads strong adhesion between AgNW and SWCNT as well as between hybrid structure and substrate. The initial sheet resistance of plasmon treated AgNW/SWCNT hybrid film was 26Ω sq-1, with >90% optical transmittance over the wavelength range 400-2700 nm. Following 200 cycles of convex/ concave bending with a bending radius of 5 mm, the sheet resistance changed from 26 to 29 Ω sq-1. This hybrid structure combined with the plasmonic welding process provided excellent stability, low resistance, and high transparency, and is suitable for highly flexible electronics applications, including touch panels, solar cells, and OLEDs.
Jongsoo Jurng,Chan Woo Park 대한설비공학회 1997 International Journal Of Air-Conditioning and Refr Vol.5 No.-
Experiments were carried out to study the operation characteristics of a high temperature regenerator for a lithium bromide (LiBr)-water absorption heat pump. In order to reduce the size and enhance the thermal efficiency of air-cooled absorption heat pump, a thermosyphon and a surface-flame burner were used. The generation rate of refrigerant, circulation rate of solution and concentration difference in LiBr solution were used as an indication of the performance, and the relationship between these variables were studied.<br/> With the heat supply increasing from 11.7 to 21.2 ㎾, the solution circulating rate was found to increase at a rate that is proportional to the square root of the heat supply. The refrigerant generating rate also increased linearly with the heat supply. The difference in LiBr concentration between the strong and the weak solution was increased with, and linearly proportional to, the heat supply. Also, the vapor-solution circulating ratio was linearly proportional to the increasing heat supply. So the difference in LiBr concentration is proportional to the vapor-solution circulating ratio. The discharge limit, defined as the discharge height where the circulation of solution stops, was shown to increase with the heat supply from 61㎝ at 19.25㎾ to 64㎝ at 23.1㎾.<br/> The effect of the solution level in a heat exchanger tube and the effect of initial LiBr concentration of solution was also studied. With the constant heat supply, the circulation rate of solution is decreased with the discharge height and rapidly drops to zero at the discharge limit. The generation rate of refrigerant remains unchanged over the wide range of the discharge height. Therefore, the vapor-solution circulation ratio will increase quickly with discharge height. So the concentration difference was increased as the discharge height was raised. The required concentration difference will be obtained by determining the initial solution level in tubes and the adequate circulating rate of solution.<br/> The generation rate of refrigerant was nearly constant between 55.5 to 59.5% initial solution concentration. This means that the generation of refrigerant is not strongly dependent on the initial concentration of solution.