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배아와 건축 구조의 위상기하학적 유비(類比, analogy)를 응용한 파빌리온 디자인 제안
강우석 ( Kang Wooseok ),채정우 ( Chae Jungwoo ) 한국공간디자인학회 2021 한국공간디자인학회논문집 Vol.16 No.3
(Background and Purpose) All animals are created for individuals equipped with complex organizations through the differentiation process. Living beings’ formation process emerges from various interactions such as cell division and systematization when the primary embryo stage, which is defined as the topologically same shape. In particular, in the gastrula stage divided into three germ layers known as ectoderm, mesoderm, and endoderm, the embryo is differentiated to each organ. During the process from the embryo to maturity, it decisively requires the supply of functions to sustain its life force, which leads to the emergence of the formative structure, the comprehensive space-time control inducing its growth, and so on. After figuring out the analogical relationship between the architectural structure and the primary embryo, it proceeds to study the dynamic spatial design involved with the life force, aiming for the intensification of topological architecture discourse. (Method) This study propels the design of a pavilion in the public space by utilizing the developmental mechanism of the fluid and replicative embryo. First, after analyzing the initial concept of the embryonic differentiation and formative process with regard to developmental biology, it is investigated for the topological properties of the embryo in the stage to prove that topologically, the torus geometry has the same shape. Second, the comparative study between the embryo’s structure and the space composition of modern architecture deduces the analogical concept. Following the purpose of using the pavilion after the relationship, design application includes structured process experiments for establishing interior, exterior, and connecting space in the pavilion based on the analogical relationship. Material selection on the surface is influenced by dynamics and self-organization features, which results in applying the principle of bimetal, new material to the architecture skin. Lastly, the shape is materialized through the interior program planning, modeling, and rendering with Rhino 3D and Grasshopper. (Results) In conclusion, the result implies that there are common elements among an animal’s embryonic emergence processes regarding the topological perspective. Furthermore, the analogy between biological organism and non-biological structure is practically applied to the pavilion design, which appears to the nonlinear prototype model, kinetic material, and organic space program for another design application. (Conclusions) Instead of the simplicity of the method to copy the appearance of life as a symbolic shape, modern architecture has worked itself through the essential mechanism of biological form and morphogenesis. Thus, due to the new technologies and digital base, it is expected that this independent adaptability of living beings would be used as a new example of the intensified architecture in various ways.
디젤자동차용 SCR/DPF 촉매의 열적·화학적 열화 특성
강우석(Wooseok Kang),최병철(Byungchul Choi) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
Recent diesel emission aftertreatment system was composed with DOC + DPF + SCR. The complexity of the afterteratment system can be reduced further by a combined system of the DPF coated with SCR. The aim of the study is to simplify the aftertreatment by an implement of the DPF coated with SCR which can obtain simultaneous NOx reduction and PM oxidation. Futher, NOx conversion of DPF coated with SCR after hydrothermal and chemical aging was conducted to know thermal and chemical aging characteristics. Model gas reactor is used to evaluate performance of the catalyst. NOx and NH3 are analyzed by FTIR. As a result of experiment, The activity of the SCR/DPF catalysts after hydrothermal and chemical aging were more superior to the Cu-ZSM-5 based catalyst compare to the CuNb-ZSM-5 based catalyst in which is added Nb precursor in order to do PM oxidation reaction actively.
강우석(Wooseok Kang),최병철(Byungchul Choi),김화남(Hwanam Kim) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
As more stringent regulations of diesel emissions are enforced in many advanced countries, an aftertreatment system advances to a combination system with some kinds of catalysts, then the total volume of catalysts is increased. The aim of this study is to simplify aftertreatment system by implementation of SCR-coated diesel particulate filter(DPF) which can obtain simultaneous NOx reduction and PM oxidation. Model gas reactor is used to evaluate performance of the catalysts. NOx and NH3 are analyzed by FTIR and PM oxidation tests were performed Thermogravimetric Aanalyzer(TGA). The prepared Nb(30%) and Ce(70%) catalyst by impregnation method was loaded on DPF. The catalyst obtained simultaneous reduction of NOx and PM oxidation. NOx conversion was about 70% at 350~450℃ in flow channel DPF coated with NbCe. PM oxidation improved compared to the Cu-ZSM5 catalyst.
디젤자동차용 SCR/DPF 촉매장치의 De-Nox 특성
강우석(Wooseok Kang),최병철(Byungchul Choi),김화남(Hwanam Kim) 한국자동차공학회 2012 한국자동차공학회 지부 학술대회 논문집 Vol.2012 No.5-2
Selective catalytic reduction(SCR) is expected to be used extensively de-NOx control for diesel vehicle. Recent diesel emission aftertreatment system was composed with DOC+DPF+SCR. The complexity of the aftertreatment system can be reduced further by a combined system of the DPF coated with SCR. The aim of the study is to simplify the aftertreatment system by an implement of the DPF coated with SCR which can obtain simultaneous NOx reduction and PM oxidation. Model gas reactor is used to evaluate performance of the catalysts. NOx and NH3 are analyzed by FTIR and PM oxidation tests were performed a thermogravimetric analyzer(TGA). The maximum NOx conversion was above 70% with Cu-ZSM5 DPF/SCR and Fe-ZSM5 DPF/SCR. NOx conversion was better Cu-ZSM5 DPF/SCR than Fe-ZSM5 DPF/SCR, because it is stronger acidity of acid site of the Cu-ZSM5 DPF/SCR. Both catalysts were not happened oxidation of PM, which oxidized only by a thermal oxidation.
강우석 ( Kang Wooseok ),안성모 ( Ahn Sungmo ) 한국공간디자인학회 2024 한국공간디자인학회논문집 Vol.19 No.2
(Background and Purpose) In the era of the Fourth Industrial Revolution, space transcends the constraints of space and time, connecting in real-time and facilitating communication, Physical space in the real world interacts dynamically with complex networks of human beings, objects, and surrounding environments, expanding into virtual realms. In the field of spatial design, it leaps forward as a space of continuous transformation with a life of its own, in response to these trends. Various systems are being developed as technical solutions to bridge the virtual and physical domains, with the concept of the digital twin gaining traction across various fields. This research aims to harness the advantages of dynamic, evolving digital twins that independently convey complex information from real-world spaces and analyze it in real-time, and offer innovative solutions for spatial forms. Furthermore, it addresses practical issues with dynamic spaces and presents the potential to predict and enhance spaces in the near future. (Method) First, this research explores the concept of dynamism and key approaches through literature review. It also investigates the concept and trends of digital twins, comparing and analyzing their relationship with the concept of dynamism in order to extract common characteristics. Second, it diagrams the physical and virtual strategies for space design, differentiating between hardware and software strategies required for design conceptualization. Third, it employs concepts and trends related to modern smart office spaces optimized for these strategies to create actual spatial works integrating digital twin systems. (Results) The research devised unit structures, rals, and vertical mobility structures to impart mobility and dynamism to the physical structure. These structures allowed the real-time collection of cluster information based on the organization's complex and organic work patterns, resulting in diverse forms. Leveraging digital twins, the system could actively adjust positions based on user behavior, maximizing creative communication in highly connected spaces. Ultimately, the hardware and software designs not only improved the efficiency of office spaces but also promoted creative and organic communication. (Conclusions) This research offers a case study of a space that goes beyond a simple description of dynamic space in terms of form and appearance, emphasizing its inherent adaptability and evolution. Also, it proposes an ambivalent direction and solution both morphological and systematic aspects simultaneously. As a result, it presents the potential for the commercialization of dynamic spaces through digital twins and their contribution to the interconnection and progress of generative spaces linking users, objects, space, and the surrounding environment in various ways.