• 조형예술학연구
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• 제3권
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• pp.178-224
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• 2001

This thesis aims to suggest the notion of the sublime as one of the common elements of contemporary plastic arts, as a new key for the reading of our visual environment. The concept of sublimity has been one of important categories in traditional aesthetics since the eighteenth century; beyond the domain of this tradition, however, it is rigorously investigated in sociology, literary criticism, visual art theory and post-structuralist philosophy, especially the investigation of post-modern conditions by Jean-Fran cois Lyotard. Jean-Fran cois Lyotard defines sublimity as the elemental feature of the late twentieth century visual arts based on post-structuralism and suggests the feeling of the sublime as dominant sensibility in post-modern society. According to Lyotard, the sublime is a contradictory feeling of pleasure mixed with suffering as in the theory of experimental avant-gardes; the post-modern sublimity is the feeling of suffering or agony when we feel in confronting the new and the unknown. The investigation of the sublime based on Lyotard's perspectives, therefore, is meaningful in decoding contemporary visual arts. This investigation, therefore, mainly deals with the post-modern concept of the sublime and contemporary visual arts viewed in the sublime.

• 멤브레인
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• 제17권2호
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• pp.93-98
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• 2007

The reliability of innovative membrane contactors technology (i.e. Gas/Liquid Membrane Contactors, Membrane Distillation/Crystallization) is today increasing for seawater desalination processes, where traditional pressure-driven membrane separation units are routinely operated. Furthermore, conventional membrane operations can be integrated with membrane contactors in order to promote possible improvements in process efficiency, operational stability, environmental impact, water quality and cost. Seawater is the most abundant aqueous solution on the earth: the amount of dissolved salts covers about 3% of its composition, and six elements (Na, Mg, Ca, K, Cl, S) account for more than 90% of ionic species. Recent investigations on Membrane Distillation-Crystallization have shown the possibility to achieve significant overall water recovery factors, to limit the brine disposal problem, and to recover valuable salts (i.e. calcium sulphate, sodium chloride, magnesium sulphate) by combining this technology with conventional RO trains. In this work, the kinetics of $CaSO_4{\cdot}2H_2O,\;NaCl\;and\;MgSO_4{\cdot}7H_2O$ crystallization is experimentally investigated in order to improve the design of the membrane-based crystallization unit.

• 정보처리학회논문지A
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• 제10A권6호
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• pp.709-714
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• 2003

최근 통신기술의 발달로 교육용 컨텐츠에 있어서도 학습자와 학습 컨텐츠 사이의 상호작용이 강조되고 있다. 반면에 기존의 WBI나 CAI의 경우는 학습자와 컨텐츠 사이의 단순한 상호작용만 적용하였다. 학습자간의 상호작용을 극대화 할 수 있는 게임 형태의 플랫폼은 찾아보기 어렵다. 이에 본 연구에서 개별적 독립학습에서 발생하는 학습자간의 상호작용 부재의 문제와 협동학습에서 나타나는 공동의 목표 설정 및 프로그램 구현의 어려움을 극복하기 위한 대안으로 다자간 상호 경쟁적 학습 모형을 제시한다. 또, 이를 적용한 네트워크 게임 형태의 교육 컨텐츠를 위한 설계와 플랫폼 형태로 실제 구현해 봄으로써 상호 경쟁적 학습 모형과 함께 교육용 컨텐츠의 새로운 관점을 제시해 보았다.

• Earthquakes and Structures
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• 제15권5호
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• pp.473-485
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• 2018

The buildings of architectural and cultural heritage are mostly built with stone or brick wall elements, which are connected using limestone or limestone cement mortar, without a full knowledge of the mechanical properties of masonry structures. The compatibility of heritage masonry buildings with valid technical specifications and the rules for earthquake resistance implies the need for construction work such as repairs, strengthening or reconstruction. By strengthening the masonry buildings, ductility and bearing capacity are increased to a level, which, in the case of the earthquake design, allows for some damage to happen, however the structure retains sufficient usability and bearing capacity without the possibility of collapse. Comparison between traditional and modern techniques for seismic strengthening of masonry buildings is given according to their effects, benefits and disadvantages. Recent Croatian provisions provided for heritage buildings enabling deviation of technical specifications are discussed.

• Structural Engineering and Mechanics
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• 제68권4호
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• pp.399-408
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• 2018

Cable supported structures have been widely used in civil engineering. Cable tension estimation has great importance in cable supported structures' analysis, ranging from design to construction and from inspection to maintenance. Even though the Bernoulli-Euler beam element is commonly used in the traditional finite element method for calculation of frequency and cable tension estimation, many elements must be meshed to achieve accurate results, leading to expensive computation. To improve the accuracy and efficiency, a dynamic finite element method for estimation of cable tension is proposed. In this method, following the dynamic stiffness matrix method, frequency-dependent shape functions are adopted to derive the stiffness and mass matrices of an exact beam element that can be used for natural frequency calculation and cable tension estimation. An iterative algorithm is used for the exact beam element to determine both the exact natural frequencies and the cable tension. Illustrative examples show that, compared with the cable tension estimation method using the conventional beam element, the proposed method has a distinct advantage regarding the accuracy and the computational time.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2004년도 추계 종합학술대회 논문집
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• pp.314-317
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• 2004

네트워크 및 소프트웨어 하부구조의 진보에 의해 이형의 컴퓨팅 자원 집합으로 구성된 환경에서 그리드 컴퓨팅 기술은 확산되고 있다. 그리드 컴퓨팅은 광대역으로 연결되어진 분산 컴퓨터들의 조정에 의한 사용을 요구한다. 그리드 컴퓨팅을 위한 다양한 시스템과 그리드 응용 서비스의 증가에 따라 그리드 운영환경은 네트워크 분리 및 노드 결함 등에 의해 높은 결함율을 가질 수 있다. 결함 검출은 그리드 응용 시스템의 강건성을 위해 시스템 설계 및 구현시의 필수적인 요소이다. 본 논문에서는 낮은 네트워크 트래픽 환경에서 높은 신뢰성 정공을 위한 OGSA(Open Grid Service Architecture) 기반의 자원 결함 검출 서비스를 제안한다.

• Architectural research
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• 제2권1호
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• pp.1-6
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• 2000

Ever since Viollet-le-Due began to examine Gothic structural elements using his method of geometrical analysis in the nineteenth century, art and architectural historians and a few engineers have periodically attempted to ascertain the structural advantages of the various characteristic features of Gothic architecture. In none of these studies, however, has the way forces work within the lightweight and spacious masonry Gothic buildings been precisely interpreted. The approach taken by art and architectural historians has therefore tended to be primarily descriptive and to be based on intuitive assumptions. This study intend to analyze the Gothic non-vaulted nef unique(aisleless) structures of Lower Languedoc which has never been scientifically tested, and to provide as comprehensive an explanation as possible of the way in which these non-vaulted buildings work. In order to achieve this goal, this paper Is to examine, by means of finite element analysis. the links between the width of non-vaulted aisleless structures, the configuration of the arches, diaphragm arch, and the buttress. Finite element analysis with a computer provides a more accurate analysis than the methods of analysis that have been heretofore applied to Gothic structures, as well as permits us to visualize the global stress behavior of the structure. Combined with traditional methods of studying historical buildings, therefore, finite element analysis inevitably give us a broader understanding of the processes involved in the design and construction of medieval buildings.

• 한국가구학회지
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• 제26권4호
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• pp.373-382
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• 2015

In this study, select the Republic of Korea mother-of-pearl lacquerware Lim chung hyu coach, I tried to find out the until the background and coach of his growth. And it was done looking for the elements of the future development of the mother-of-pearl lacquerware through the tendency of his work after the coach has been. Lim chung hyu coach is, unlike other mother-of-pearl lacquer craftsman, confirmed the affection and passion to his mother-of-pearl lacquerware as seen through the work to manufacture in his unique way. Through the mother-of-pearl lacquer-ware production processes and trends of his works of Lim chung hyu coach it increased the overall understanding of the mother-of-pearl lacquerware. The work of Lim chung hyu coach was studied analysis confirmed the superiority of the mother-of-pearl lacquer crafts that are completed through a number of steps. Through the work trend of the traditional while it adheres to craft system in pursuit of modernization together the Republic of Korea lacquerware masters Lim chung hyu coach, has described a vision for the potential of the development of the mother-of-pearl lacquerware to pursue him.

• 한국가구학회지
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• 제24권4호
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• pp.444-451
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• 2013

In this paper, experimental results were presented on the moment resistance of a concealed timber post base joint aimed at replacing in a modern design introduced lately the wood to wood joints used in the traditional Korean timber house - Hanok. Preliminary results showed that the original configuration of the joint offers a limited moment resistance and a low ductility and energy dissipation. In an attempt to mitigate those limitations without undergoing major changes in the connector, three new configurations were proposed and investigated. Motivated by the wish to prevent the early failure in welds, a first approach consists in directly bolting the connector's upper plate to lower the stress on the weak welds. Alternatively, another approach focused on increasing the strength of these welds by extending their length to the full width of the metal wings. Finally, a third configuration investigated the effect of those two approaches combined. In conclusion, reinforcing the welds found out to be the best option among the presented ones. As a result, this connector considered to show proper ability for use in earthquake-resistant structures with suited lateral-resistant structural elements.

• Journal of Power Electronics
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• 제11권4호
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• pp.490-498
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• 2011

This paper presents a novel analysis, design, and implementation of a battery charging three-phase high frequency semi-controlled power converter feasible for plug-in hybrid electric vehicles. The main advantages of the proposed topology include high efficiency; due to lower power losses and reduced number of switching elements, high output power density realization, and reduced passive component ratings proportionally to the frequency. Additional advantages also include grid economic utilization by insuring unity power factor operation under different possible conditions and robustness since short-circuit through a leg is not possible. A high but acceptable total harmonic distortion of the generator currents is introduced in the proposed topology which can be viewed as a minor disadvantage when compared to traditional boost rectifiers. A hysteresis control algorithm is proposed to achieve lower current harmonic distortion for the rectifier operation. The rectifier topology concept, the principle of operation, and control scheme are presented. Additionally, a dc-dc converter is also employed in the rectifier-battery connection. Test results on 50-kHz power converter system are presented and discussed to confirm the effectiveness of the proposed topology for PHEV applications.