• 한국정밀공학회지
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• 제20권4호
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• pp.29-38
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• 2003

This paper deals with an automated computer-aided process planning and die design system with which designer can determine operation sequences even after only a little experience in process planning and die design of multi former-bolt products by multi-stage former working. The approach is based on knowledge-based rules, and a process knowledge base consisting of design rules is built. Knowledge fur the system is formulated from plasticity theories, empirical results and the empirical knowledge of field experts. Programs for the system have been written in AutoLISP for AutoCAD with a personal computer. An attempt is made to link programs incorporating a number of expert design rules with the process variables obtained by commercial FEM softwares, DEFORM and ANSYS, to form a useful package. The system is composed of four main modules. The process planning and die design module considers several factors, such as the complexities of preform geometry, punch and die profiles, specifications of available multi former, and the availability of standard parts. It can provide a flexible process based on either the reduction in the number of forming sequences by combining the possible two processes in sequence, or the reduction of deviation of the distribution and the level of the required forming loads by controlling the forming ratios. The system uses 2D geometry recognition and is integrated with the technology of process planning, die design, and CAE analysis. The standardization of die parts for multi former-bolt products requiring a cold forging process is described. The system developed makes it possible to design and manufacture multi former-bolt products more efficiently.

• Imaging Science in Dentistry
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• 제52권2호
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• pp.197-207
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• 2022

Purpose: This study evaluated the associations of the dental arch form, age-sex groups, and sagittal root position (SRP) with alveolar bone thickness of the maxillary central incisors using cone-beam computed tomography (CBCT) images. Materials and Methods: CBCT images of 280 patients were categorized based on the dental arch form and age-sex groups. From these patients, 560 sagittal CBCT images of the maxillary central incisors were examined to measure the labial and palatal bone thickness at the apex level and the palatal bone at the mid-root level, according to the SRP classification. The chi-square test, Kruskal-Wallis test, and multiple linear regression were used for statistical analyses. Results: Significant differences were found in alveolar bone thickness depending on the arch form and SRP at the apex level. The square dental arch form and class I SRP showed the highest bone thickness at both levels of the palatal aspect. The taper dental arch form and class II SRP presented the highest bone thickness at the apex level of the labial aspect. No association was found between the dental arch form and SRP. Elderly women showed a significant association with thinner alveolar bone. Age-sex group, the dental arch form, and SRP had significant associations with alveolar bone thickness at the apex level. Conclusion: The patient's age-sex group, dental arch form, and SRP were associated with alveolar bone thickness around the maxillary central incisors with varying magnitudes. Therefore, clinicians should take these factors into account when planning immediate implant placement.

• 한국의류산업학회지
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• 제25권6호
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• pp.690-703
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• 2023

With the emergence of digitalization and environmental changes, such as those caused by COVID-19 and high-speed networks, online video platforms have changed how people communicate and created new marketing opportunities. The unique characteristics of mobile short-form videos are causing more people to consume and produce diverse content in the digital environment. The study focuses on two story types (product essential and relative information) to examine the effectiveness of short-form videos for fashion marketing. This study verified the influence of the common traits of short-form video content (informativeness, expertise, familiarity, and playfulness) on fun, e-WOM, and purchase intention and the mediation effect of fun using video samples categorized by story type. In this study, 300 Gen Z men and women responded to a survey after watching a 30-second short-form video sample. All the traits of short-form video content were found to have a positive effect on fun. Moreover, all the traits excluding playfulness had a positive effect on e-WOM and purchase intention as well. Fun had a positive effect on both e-WOM and purchase intention as well as a partial mediating effect. These findings are expected to provide insight and reference for planning short-form video marketing from the perspective of the fashion industry.

• 디지털융복합연구
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• 제10권10호
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• pp.447-456
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• 2012

공간과 형태 디자인에 있어서 스터디모델은 완성될 공간이나 형태가 디자인되는 공간과 형태에 구체적인 시각적 매개체를 제공하며, 보다 근본적으로 디자인도면에 대한 상호 보완적 수단으로서 이용된다. 즉 스터디모델은 2차원적인 속성을 지니는 디자인 도면에 3차원적인 이해 수단을 추가적으로 부여한다. 따라서 디자인이 진행되는 동안 구체적인 공간의 형태와 공간구성을 디지털스터디모델을 이용하여 자유로운 각도에서 시각적으로 감지하며 공간과 형태를 분석하게 해준다. 일반적으로 유형적인 재료를 사용하여 제작되는 스터디모델은 디자인 과정에서 디자인 내용의 변경과 스터디모델의 용도에 따라서 여러 번 제작되어야 하며, 디자인도면과 모델의 관계는 공간의 지각과 이해를 통해서만 이루어진다. 이것은 디자인도면과 스터디모델 매체사이의 상호보완성이 동시에 이루어지지 않기 때문이다. 그러나 본 연구에서 제안된 3차원 디지털 디자인 프로세스를 이용하면, 즉각적인 시각적 표현과 더불어 디자인 단계에서 다양한 분석과 디지털 디자인모델 결과물들을 얻어낼 수 있게 된다. 결국 디자인계획과 디자인 구체화 단계에서 디지털디자인 프로세스를 활용할 경우 입체적 표현을 실시간으로 적용할 수 있으며, 3차원 디지털모델을 시각화하여 최종 디자인을 위한 공간과 형태의 다양한 분석이 가능하게 된다.

• 디자인학연구
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• 제16권4호
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• pp.405-412
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• 2003

본 연구는 이용자 중심의 버스정류장 쉘터를 계획, 설계함에 있어서 필요한 시각적 선호요인을 파악하기 위하여 “주변 환경이 일정할 때 쉘터는 어떠한 요인에 의해 선호되어지는가？”에 대한 연구의문에서 출발하여 버스정류장 쉘터 형태에 영향을 미치는 선호요인을 구명하였다. 본 연구는 등간척도의 점수부가체계를 적용하여 이용자에 의한 쉘터 형태의 시각적 선호를 평가한 후 시각적 선호와 이에 영향을 미치는 선호요인들과의 관계를 다중회귀분석방법으로 검정하였다. 이상의 연구 결과를 통하여 버스정류장 쉘터 형태의 시각적 평가에 의한 요인분석 결과는 이용자 중심으로 한 버스정류장 쉘터 디자인에 큰 영향을 미칠 것이다. 그러므로 본 연구 결과는 버스정류장 쉘터의 계획 및 설치에 필요한 지식을 제공해 주고 이용자의 만족을 극대화할 수 있는 쉘터 디자인과 버스정류장 조성에 기여할 것이다. 또한 버스정류장 시설물 관리에 있어서 이용자 중심의 쉘터 관리를 전략적으로 마련하는데 유용한 지침을 제공할 것으로 판단된다. 특히 일상생활에서 대중교통 이용자의 시각적 평가에 의한 선호요인 분석은 버스정류장 계획에 요체가 될 것으로 판단된다.

• 대한토목학회논문집
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• 제37권1호
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• pp.255-268
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• 2017

많은 도시들은 각각 상이한 지리적, 공간적, 환경적 특성들을 가지고 있다. 이러한 특성들은 각 공간마다의 고유한 장소성을 나타내는 요소이며, 도시계획 및 개발이 행해질 때 충분히 반영되어야 한다. 그럼에도 불구하고 이는 실질적으로 계획에 반영되지 못하는 부분이 많으며 그로 인해 뜻밖의 무장소성의 공간이 만들어지기도 한다. 특히 항구도시에서의 항만공간은 해당 도시의 문화적, 역사적, 지리적, 환경적 특성이 매우 강한 곳으로 다른 공간과 다른 독창적이고 특화된 공간이 만들어 져야 한다. 이에 항만공간만의 장소성을 부각시키기 위해 물리적 요소 뿐만 아니라 사회적 요소 또한 적극 반영해야 할 것으로 사료된다. 본 연구에서는 기존의 용도지역지구제가 가지고 있는 제도 자체의 경직성을 탈피하고, 보다 유연한 도시계획적 접근방안 모색을 위해 대두되고 있는 FBCs를 활용하였다. 또한 항만공간의 장소성 형성을 위한 요소를 도출하고, 각 항만공간의 장소성을 구축하였다.

• 대한건축학회논문집:계획계
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• 제34권11호
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• pp.113-123
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• 2018

First of all, the multi-story Housing applying resident's participation in europe was classified by the menu selection method, the two-step supply method and the cooperative method. And then I analyzed flexible unit plan of cases for deriving the planning methode and the characteristics of flexibility. First, I analyzed the area and form of the unit plan, structure and Installation, fixed and variable elements to derive the planning method. The area of units are distributed from a minimum of $35m^2$ to a maximum of $150m^2$, and many of the unit planes have a narrow front and a deep depth. The structure is a long-span wall-structure or a skeleton structure, and is designed without any columns and bearing walls in the interior space for flexibility in spatial composition. The vertical shafts are located in the center of the unit in a box-form or in the corner at the unit dividing wall for free placement of interior wall. Fixed elements are framework and facility systems. Most of the future residents in the two-steps supply method and the cooperative method were able to freely design the internal space within the zoning concept proposed by the architect and change the location of the facade element within module system proposed by the architect. Second, the characteristics of the flexibility applied to the unit plan were divided in integrated flexibility, functional flexibility, construction flexibility, and supply flexibility. The integrated flexibility enables residents to give the variable space combination based on the complex structure of the inner space for providing various living experiences. Regarding functional flexibility, the three-dimensional spatial structure with neutral space has multi-functionality according to the needs of residents and easily accepts mixing of hybrid programs such as work and residence. Constructive flexibility allows residents to create identity by freely planning interior space and changing the size or location of facade components in a determined system of architects. Finally, various types of size and space composition are proposed and realized in the whole building applying menu selection method, so that flexibility in the offer can accommodate and integrate various types of living.

• 한국콘텐츠학회논문지
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• 제6권8호
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• pp.114-123
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• 2006

유비쿼터스적 디지털 기술에 의한 제 3의 공간의 실용적 가치가 급속도로 상승하고 있는 현실에서, 시대적 변화에 부응하는 선도적 공간디자이너를 양성하기 위하여 디지털 융합기술 영역과의 교류를 기반으로 한 '학제간 연계 교육'이 필수적인 상황이다. 이에 본 연구에서는 새로운 통합적 공간연출에 대한 고찰과 해외사례분석을 통해, 기술적 측면에서의 감성공간구현을 위한 Interdisciplinary Teaching Form으로서 디지털 상호작용 기술, 디지털 통합 기술, 디지털 창작 기술의 3가지 교육영역을 정하고, 시범적으로 교육현장 적용 과정을 거침으로써, 이상적이고 미래지향적인 공간디자인 교육의 기초적 형태와 그 차별화 된 결과물을 제시하였다.

• 한국CDE학회논문집
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• 제9권1호
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• pp.44-50
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• 2004

Mechanical parts are often grouped into part families based on the similarity of their shapes, to support efficient manufacturing process planning and design modification. The 2-part sequence papers present similarity assessment techniques to support part family classification for machined parts. These exploit the multiple feature decompositions obtained by the feature recognition method using convex decomposition. Convex decomposition provides a hierarchical volumetric representation of a part, organized in an outside-in hierarchy. It provides local accessibility directions, which supports abstract and qualitative similarity assessment. It is converted to a Form Feature Decomposition (FFD), which represents a part using form features intrinsic to the shape of the part. This supports abstract and qualitative similarity assessment using positive feature volumes. FFD is converted to Negative Feature Decomposition (NFD), which represents a part as a base component and negative machining features. This supports a detailed, quantitative similarity assessment technique that measures the similarity between machined parts and associated machining processes implied by two parts' NFDs. Features of the NFD are organized into branch groups to capture the NFD hierarchy and feature interrelations. Branch groups of two parts' NFDs are matched to obtain pairs, and then features within each pair of branch groups are compared, exploiting feature type, size, machining direction, and other information relevant to machining processes. This paper, the first one of the two companion papers, describes the similarity assessment methods using convex decomposition and FFD.

• 한국조경학회지
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• 제21권3호
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• pp.65-75
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• 1993

This study was carried out to analyze the user's perception of crowding in lawn areas in parks. On-site questionnaire survey was executed to study the variables which influence the Perception of Crowding(PC). The survey sites were lawn areas at and in Bo-mun Resort Complex in Kyung-ju. The major results were as follows; 1. Generally, in site's frequency of use, 2-3 times a year ranked as the highest (49%), and in user's residence, Busan and Pohang were highly ranked. As the purpose of visit, two survey sites showed differently. In , family picnic ranked high, but in case of , it had the tendency to the use of adult group and the rally for union. 2. By the results of the analysis of variables related to perceived crowding(PC), perceived density(PD) was the most influensive variables, nuisances by other users(NU) and expected crowding(EC) were another influensive variables. The candidate regression model is, PC=-0.125+0.597(PD)+0.409(NU)+0.307(EC) (R2=0.4592). 3. In variables, related to use density, perceived density(PD) was more influensive and significant variables than actual use density(AD). 4. In planning and design of lawn areas in park, is recommended than . The lawn areas of are more desirable and accommodative than in overuse situation.