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○○○설계 프로젝트에서 나타나는 건축장과 프랙탈 구조의 특성에 관한 연구
이승용 한국문화공간건축학회 2018 한국문화공간건축학회논문집 Vol.- No.64
The architectural field understood the conceptual geometry of relation, but it is difficult to show the architecture as a form. To design the architectural form on the conceptual idea of the architectural field, the clue of design for form of architectural field could be found from the fractal system which is showed of the geometrical characteristic of the chaos phenomenon of nature. The fractal system has three characteristics, those are self-similarity, self-production and self-organization. The self-similarity is that the part has a similarity system as a whole, and it show the similar composition of the area of the architectural field by composing the similar network of any area among the environments, exterior and architecture. The self-production is that the making organization by combining, and it show the similar composition of the interaction of the architectural field that the architecture interact to environment and by this interaction to create new but interacted architecture continously. The self-organization is the organizing by itself on internal logic, and it show the composition of the integration of the architectural field by connecting building and space to one as a building and a space are no longer divided by flexibility, diversity and graduations. Therefore the architectural field is showed the geometrical characteristics of the fractal system.
Neurovascular Interaction and Exercise Training for Bone Regeneration
이승용 한국운동생리학회 2023 운동과학 Vol.32 No.2
The nervous and vascular systems are widely distributed in the skeletal system and play an important role in bone metabolism and bone formation, respectively. Their independent impact on the skeletal system has received keen attention in bone-related research over the decade. However, the mechanism of neurovascular coupling during physiological bone remodeling and regeneration has recently been highlighted, considering the importance of spatial relationships between bone-associated skeletal nerves and blood vessels. In addition, the positive effect of exercise on the bones has been continuously emphasized, as evident by the improved number and function of skeletal nerves and blood vessels following exercise training. Skeletal nerve-vascular crosstalk and exercise training are essential for bone development and regeneration, respectively; however, the effect of exercise on neurovascular interactions has not yet been studied. This review aims to summarize the regulatory roles of the nerves and blood vessels in bone metabolism and regeneration and to highlight a combination of potential cellular processes of neurogenesis and angiogenesis in bone regeneration. Moreover, given the significance of the spatial relationship between nerves and blood vessels in bones and the role of exercise training, this review aims to discuss the potential physiological neurovascular coupling that occurs following exercise and physical activity.
K-L공간 에지 검출과 홍채 결함영역 추출에 관한 연구
이승용,류광렬 목원대학교 멀티미디어신기술연구소 2001 멀티미디어신기술연구소논문집 Vol.1 No.1
본 논문은 K-L 공간 기법으로 에지를 검출하고 홍채 진단을 위해 에지 영상 패턴 매칭을 이용하여 홍채의 결합조직 위치를 검출하는 연구이다. 에지 검출 기법은 8방향 키어쉬-라프라시언 기법을 적용하고 진단영역인식은 진단기준패턴과 입력에지영상패턴과 오버랩핑 패턴 매칭으로 결함영역을 검출하였다. 그 결과 적용한 에지 검출 영상의 PSNR이 131 정도이며 패턴 매칭 영역 인식 결과는 89%정도이며 홍채에 의한 인체의 상태를 추정하는 자동진단시스템으로 활용 할 수 있는 가능성을 제시하였다. This paper presents K-L spatial edge detection and iries defective area extraction for diagnosis by edge image pattern matching. The edge detection results from 8 directions Kirsch and Laplacian method. The defective iris area is extracted in overlapping diagnostic reference pattern with inputed edge image pattern. The results are PSNR 13 to K-L spatial edge detection and 89% for detective area recognition to lead a auto iries diagnostic system.
TMCP로 제조된 고강도 베이나이트강의 유효결정립도와 저온인성에 미치는 Cu와 B의 영향
이승용,황병철,Lee, Seung-Yong,Hwang, Byoungchul 한국재료학회 2014 한국재료학회지 Vol.24 No.10
Effects of Cu and B on effective grain size and low-temperature toughness of thermo-mechanically processed high-strength bainitic steels were investigated in this study. The microstructure of the steel specimens was analyzed using optical, scanning, and transmission electron microscopy; their effective grain size was also characterized by electron back-scattered diffraction. To evaluate the strength and low-temperature toughness, tensile and Charpy impact tests were carried out. The specimens were composed of various low-temperature transformation products such as granular bainite (GB), degenerated upper bainite (DUB), lower bainite (LB), and lath marteniste (LM), dependent on the addition of Cu and B. The addition of Cu slightly increased the yield and tensile strength, but substantially deteriorated the low-temperature toughness because of the higher volume fraction of DUB with a large effective grain size. The specimen containing both Cu and B had the highest strength, but showed worse low-temperature toughness of higher ductile-brittle transition temperature (DBTT) and lower absorbed energy because it mostly consisted of LB and LM. In the B-added specimen, on the other hand, it was possible to obtain the best combination of high strength and good low-temperature toughness by decreasing the overall effective grain size via the appropriate formation of different low-temperature transformation products containing GB, DUB, and LB/LM.
고온-고압 수소 주입된 Fe-30Mn-0.2C-(1.5Al) 고망간강의 인장 거동에 미치는 표면 조건의 영향
이승용,이상혁,황병철,Lee, Seung-Yong,Lee, Sang-Hyeok,Hwang, Byoungchul 한국재료학회 2017 한국재료학회지 Vol.27 No.6
In this study, two Fe-30Mn-0.2C-(1.5Al) high-manganese steels with different surface conditions were hydrogen-charged under high temperature and pressure; then, tensile testing was performed at room temperature in air. The yield strength of the 30Mn-0.2C specimen increased with decreasing surface roughness(achieved via polishing), but that of the 30Mn-0.2C-1.5Al specimen was hardly affected by the surface conditions. On the other hand, the tendency of hydrogen embrittlement of the two high-manganese steels was not sensitive to hydrogen charging or surface conditions from the standpoints of elongation and fracture behavior. Based on the EBSD analysis results, the small decrease in elongation of the charged specimens for the Fe-30Mn-0.2C-(1.5Al) high-manganese steels was attributed to the enhanced dislocation pile-up around grain boundaries, caused by hydrogen.
The Concept of Totality and its Implication on Noun Interpretation in Natural Languages
이승용 한국 포르투갈-브라질 학회 2014 포르투갈-브라질 연구 Vol.11 No.1
The purpose of this research is to redefine the concept of totality presented in Lee (2013) with wide range of data across languages. It was developed to explain generic and existential meaning of nouns. According to previsous works (Lee, 2013, 2014) noun forms are irrelevant to those meanings because generic and existential meanings are expressed by all kinds of noun forms across languages. The notion of ‘totality’ and its way of interpretation are relevant to determine whether a noun receives generic reading or not. Lee (2013) argues that generic and existential meanings are equally derived from the notion of ‘totality’. This paper goes to verify the idea proposed in Lee (2013) and show aspectual restriction on time condition. In short, generic reading on nouns is only possible with predicates having non-closed timeline.