• Elastomers and Composites
• /
• 제55권1호
• /
• pp.46-50
• /
• 2020

Material extrusion (ME)-type 3D printing is the most popular among the 3D printing processes. In this study, the cross-section morphologies of ME-type 3D printing manufactured specimens were observed with respect to the thermal properties of the material. The cross-section morphology of a specimen is related to the deposition strength, and the outside profile of the cross-section is related to the surface roughness. The filaments used in this study, with different thermal conductivities, were the acrylonitrile-butadiene-styrene (ABS), the high impact polystyrene (HIPS), the glycol-modified polyethylene terephthalate (PETG), and the polylactic acid (PLA). The cross-sections and the surfaces of the 3D manufactured specimens were examined. In ME-type 3D printing, the filaments are extruded through a nozzle and they form a layer. These layers rapidly solidify and as a result, they become a product. The thermal conductivity of the material influences the cooling and solidification of the layers, and subsequently the cross-section morphology and the surface roughness.

• 디자인학연구
• /
• 제14권
• /
• pp.245-254
• /
• 1996

형태와 기능은 디자인의 조형적인 실체를 파악하는 주요 요소일 뿐만 아니라 사물의 존재를 결정짓는 기본요소이다. 그러므로 디자인에서 제기하는 모든 문제들의 접근은 결국 형태와 기능의 문제해결이고, 아울러 이에 따른 구체적인 조형창출이다. 그러나 디자인조형에서 형태와 기능에 관한 내용은 그 중요성에 비해 아직까지 심층적인 접근이나 충분한 지식·이론체계의 정립이 미흡하다. 이와 같은 관점에서, 본 연구에서는 형태와 기능을 대상으로 이들의 본질적인 개념과 내면적인 실체, 그리고 관련되는 제반의 의미적인 유형들을 체계적이고 종합적인 차원에서 연구·고찰한다. 아울러 형태와 기능의 상호관계를 몇 가지 주요 측면에서 다각적으로 해석·규명한다. 본 연구를 통해 얻어진 결과는 디자인조형 분야의 새로운 학문적인 체계를 구축하는 데에는 물론이고, 오늘날 디자인에서 각별히 요망되고 있는 새로운 조형사고 및 조형기술을 개발하는데 다소나마 기여하게 될 것이다.

• 국제초고층학회논문집
• /
• 제5권2호
• /
• pp.87-94
• /
• 2016

High-rise as a building typology is gaining popularity in Asian mega-cities, due to its advantages in increasing volumetric density with limited land resources. Numerous factors contribute to the formation of high-rise urban form, from economical and institutional, environmental to socio-political. Environmental concerns over the impact of rapid urbanization in developing economies demand new thought on the link between urban environment and urban form. Outdoor and indoor climate, pedestrian comfort, and building energy consumption are all related to and impacted by urban form and building morphology. There are many studies and practices on designing individual "green" high-rise buildings, but far fewer studies on designing high-rise building clusters from the perspective of environmental performance optimization.. This paper focuses on the environmental perspective, and its correlation with the evolution of the high-rise urban form. Previous studies on urban morphology in terms of environmental and energy performance are reviewed. Studies on "parameterizing" urban morphology to estimate its environmental performance are reviewed, and the possible urban design implications of the study are demonstrated in by the author, by way of a microclimate map of the iconic Shanghai Xiao Lujiazui CBD. The study formulates the best-practice design guidelines for creating walkable and comfortable outdoor space in a high-rise urban setting, including proper sizing of street blocks and building footprint, provision of shading, and facilitating urban ventilation.

• 복식
• /
• 제39권
• /
• pp.39-58
• /
• 1998

In this research, first of all, the special feat-ures of Haute Couture design world (1990∼1996) prevailed in Paris and Rome are investigated, and additionally the understanding of collection concept and design structure analysis are performed to show the various method-ology of creative design. Expression method and design method are the main criteria in analyzing, and the main results of this research are summarized as follows : 1. Most of designers in Paris and Rome ex-press the traditional costume style. Paris designers are focusing on the expression of design morphology through the abstraction and re-appearance without being confined to theme expression ; Rome designers are expressing their main ideas utilizing the fashion image as their theme in lieu of expressing the design morphology. 2. Most of the designers in Paris and Rome are using simple lines for their design. Paris designers prefer the plastic design based upon formal and symmetrical balance of informal and asymmetrical balance to the partial trans-formation design ; Rome designers are enjoy-ing rather the partial transformation using the detail and trimming than the plastic design.

• 한국디자인학회:학술대회논문집
• /
• 한국디자인학회 1995년도 춘계 학술대회-디자인 학 연구
• /
• pp.60-63
• /
• 1995

• International Journal of Fuzzy Logic and Intelligent Systems
• /
• 제9권3호
• /
• pp.172-177
• /
• 2009

In this paper, a new morphology-based homomorphic filtering technique is presented to enhance features in medical images. The homomorphic filtering is performed based on the morphological sub-bands, in which an image is morphologically decomposed. An evolutionary design is carried to find an optimal gain and structuring element of each sub-band. As a search algorithm, Differential Evolution scheme is utilized. Simulations show that the proposed filter improves the contrast of the interest feature in medical images.

• 한국의상디자인학회지
• /
• 제21권2호
• /
• pp.109-122
• /
• 2019

The purpose of this study is to examine the clothing component information and attributes as the control parameters for the 3D modeling process of the biomorphic clothing sculpture using a parametric methodology. The 3D modeling parameters of biomorphic clothing sculpture were identified as exaggerated silhouette, surface texture, and digital color. The types of exaggerated silhouettes were shoulder and hip exaggeration, shoulder exaggeration, hip exaggeration, vertical exaggeration, and horizontal exaggeration. The types of surface texture were embossed, lacy, furry, and complex textures. The types of digital color were chrome, blur, blend, and acid colors. The characteristics of morphological representation due to the attributes of these control variables were identified as morphological variation, organic morphology, organizational morphology, and realistic morphology. As a result, it was found that the parameter attributes were applied to the biomorphic clothing sculpture parametric design process and developed into various shapes.

• Structural Engineering and Mechanics
• /
• 제76권5호
• /
• pp.561-578
• /
• 2020

The present work addresses the surface integrity and chip morphology in finish hard turning of AISI D3 steel under nanofluid assisted minimum quantity lubrication (NFMQL) condition. The surface integrity aspects include microhardness, residual stress, white layer formation, machined surface morphology, and surface roughness. This experimental investigation aims to explore the feasibility of low-cost multilayer (TiCN/Al2O3/TiN) coated carbide tool in hard machining applications and to assess the propitious role of minimum quantity lubrication using graphene nanoparticles enriched eco-friendly radiator coolant based nano-cutting fluid for machinability improvement of hardened steel. Combined approach of central composite design (CCD) - analysis of variance (ANOVA), desirability function analysis, and response surface methodology (RSM) have been subsequently employed for experimental investigation, predictive modelling and optimization of surface roughness. With a motivational philosophy of "Go Green-Think Green-Act Green", the work also deals with economic analysis, and sustainability assessment under environmental-friendly NFMQL condition. Results showed that machining with nanofluid-MQL provided an effective cooling-lubrication strategy, safer and cleaner production, environmental friendliness and assisted to improve sustainability.

• The Journal of Advanced Prosthodontics
• /
• 제7권6호
• /
• pp.431-436
• /
• 2015

PURPOSE. The aim of this study was to evaluate occlusal contacts generated by 3 different biogeneric design modes (individual (BI), copy (BC), reference (BR)) of CEREC software and to assess the designs subjectively. MATERIALS AND METHODS. Ten pairs of maxillary and mandibular casts were obtained from full dentate individuals. Gypsum cast contacts were quantified with articulating paper and digital impressions were taken. Then, all ceramic crown preparation was performed on the left first molar teeth and digital impressions of prepared teeth were made. BI, BC, and BR crowns were designed. Occlusal images of designs including occlusal contacts were superimposed on the gypsum cast images and corresponding contacts were determined. Three designs were evaluated by the students. RESULTS. The results of the study revealed that there was significant difference among the number of contacts of gypsum cast and digital models (P<.05). The comparison of the percentage of virtual contacts of three crown designs which were identical to the contacts of original gypsum cast revealed that BI and BR designs showed significantly higher percentages of identical contacts compared with BC design (P<.05). Subjective assessment revealed that students generally found BI designs and BR designs natural regarding naturalness of fissure morphology and cusp shape and cusp tip position. For general occlusal morphology, student groups generally found BI design "too strong" or "perfect", BC design "too weak", and BR design "perfect". CONCLUSION. On a prepared tooth, three different biogeneric design modes of a CAD/CAM software reveals different crown designs regarding occlusal contacts and morphology.

• 한국지능시스템학회:학술대회논문집
• /
• 한국퍼지및지능시스템학회 1998년도 The Third Asian Fuzzy Systems Symposium
• /
• pp.745-749
• /
• 1998

Mathematical morphology (MM) has been introduced as a powerful tool for studying the geometrical properties of images, MM is a good approach to digital image processing , which is based on the shape feature. The MM operators such as dilation, erosion, closing and opening have been applied successfully to image noise reduction. The MM filters can easily filter the noise when the noise factors are known. However it is very difficult to reduce the noise when images are ambiguous, because the boundary between the noise and object is vague. In this paper, we propose a new method to reduce noise from ambiguous images by using Fuzzy Mathematical Morphology (FMM) operators. Performance evaluation via simulations show that the FMM filters efficiently reduce the image noise. Furthermore, the FMM filters show a good performance compared with the conventional filters.