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[특별세션]DIC 액압벌지실험을 이용한 순 티타늄 판재의 소성유동곡선에 관한 연구
김진재(Jinjae Kim),김영석(Youngsuk Kim),권성진(Seongjin Kwon) 한국자동차공학회 2016 한국자동차공학회 부문종합 학술대회 Vol.2016 No.5
In this paper, the plastic flow curve of commercially pure titanium sheet (CP Ti) has been evaluated using Tensile test and Hydraulic bulge test. The plastic flow curve known as hardening curve is a key on factor needed in conducting finite element analysis for the forming process of sheet material. However, several sheet forming processes lead to the large plastic deformation of which the plastic strain is over the maximum uniform elongation of uniaxial tensile test, for instance, clinch forming, hydroforming, stamping and deep drawing. Therefore, we have performed tensile and a hydraulic bulge test for CP Ti sheet. We also have used and evaluated three method that convert from hydraulic bulge flow curve to tensile flow curve. The measured true flow curve from the hydraulic bulge test can be fitted well by the hardening equation known as Kim-Tuan model.
Changwook Kim,Seongjin Yoo,Min-Jun Kim,Sejin Ko,Jeounghak Lee 글로벌지식마케팅경영학회 2023 Global Marketing Conference Vol.2023 No.07
From the standpoint of developing a transformative service to create improvements in collective wellbeing (Anderson & Ostrom, 2015), evidence of a sport–resilience relationship is gradually accumulating in the literature (Kim et al., 2022). Sport management and social science scholars are making considerable efforts to understand how sport entities with transformative services can contribute to consumer resilience—an intervention through a sport consumption experience that affects people’s abilities to cope with adversity (Inoue et al., 2022; MacIntosh et al., 2020). However, little is known about the sport industry and spatial consumer behavior in terms of consumer resilience. Although previous researchers have identified a macro-level association between sport industry and community resilience from a bird's eye view (Kim et al., 2021), it could not determine how and where sport industry at a macro level can be related to individual-level resilience through metaphors of Consumer Desire. Specifically, the spatial patterns of sport consumption (i.e., consumer spatial behavior) can be a result of sport consumer behavior affected by spatial context upon heterogeneous features of sport industry across regions (Kim et al., 2021) in the environment–behavior paradigm (Olsson & Gale, 1968). The macrolevel clustering of the sport industry in a region (environment) can be a community resource to provide individuals with the opportunity for sport consumption (behavior), which promotes the micro-level psychosocial factors for sport consumer resilience (Inoue et al., 2022). Furthermore, recent work illustrates heterogeneous spatial interaction at the regional level of the sport industry and individual-level sport consumption (Kim et al., 2022), suggesting the elaboration of cross-level spatial interaction models (Kim et al., 2021). Accordingly, in this study we aim to not only (a) determine spatially heterogeneous interactions in the association between sport industry and consumer spatial behavior in affecting consumer resilience, but also (b) identify what effect spatial interaction has on cross-level relationships. Using data focused on a multiscale-based nested geographic structure (e.g., individual-level consumption by zip code, county, state, and nation) that could elucidate the sport consumer spatial behavior, We collected multiple types of data from Florida, including the location quotient of the main seven sport industries (e.g., sport facilities) and socioeconomic factors (e.g., social vulnerability) at the county level from secondary sources. In addition, we acquired individual-level data from Qualtrics panels (1,107 Florida residents) to measure sport consumer spatial behavior (e.g., location-based sport consumption experience) and consumer resilience using the Connor-Davidson Resilience Scale. To address spatial interaction and heterogeneity, we used a comprehensive analytical model for global and local spatial analysis, including a spatial multilevel mediation (SMM) model and multiscale geographically weighted regression (MGWR) model. As a result of the SMM model, the county-level cluster of sport facilities affected individual-level participatory sport consumption, which enhanced consumer resilience (cross-level interaction effect). However, considerable spatial non-stationarity appeared in the spatial interaction, indicating interregional interactions in the cross-level effects within a county. The results of MGWR indicated significant spatially heterogeneous patterns in the association between the cluster of sport facilities and participatory sport consumption. That is, it was clarified that the spatial heterogeneous effects of the clustering of sport facilities on sport consumer spatial behavior are associated with consumer resilience. This empirical interdisciplinary work, including sport management, geography, and consumer psychology, advances knowledge of consumer spatial behavior and resilience by demonstrating heterogeneous spatial interactions. Practically, the current study calls for spatial management planning and strategy in sport industry for enhancing consumer resilience through spatial sport consumption, considering spatially varying patterns.
Rearing the swallowtail butterfly, Papilio xuthus, on a pellet-type artificial diet
Seonghyun Kim,Namjung Kim,Seongjin Hong,Haechul Park,Youngbo Lee,Kwanho Park,Wonho Choi 한국응용곤충학회 2013 한국응용곤충학회 학술대회논문집 Vol.2013 No.10
The effect of an artificial diet on the developmental rate, a life history parameter, was examined for the swallowtail butterfly, Papilio xuthus. Artificial insect diets are an essential component of many insect rearing systems that produce insects for research purposes. Complex agar-gelled diets are generally prepared in large batches and used shortly after preparation because the degradation of perishable diet ingredients, such as vitamins and fatty acids, can adversely affect insect quality (Brewer F D 1984). However, the timing of diet preparation may be inconvenient and large batches wasteful if the unused, excess diet is discarded. This study showed that if the artificial diet was fed during the larval stage, the larval and pupal developmental periods, the percentage of pupation, and the pupal weight generally did not differ significantly among the five artificial diets evaluated. The percentage of pupation varied considerably, with no significant differences among diets except for diet C. A maximum pupation percentage of 83% was observed on diet C. Pellet-type diets were investigated with the aim of developing a more easily prepared diet. The extrusion of the artificial diet under high temperature and pressure may induce desirable chemical and physical changes in the extruded product. The purpose of the present study was to develop an artificial diet for rearing P. xuthus.
브랜드 콘셉트의 시각화에 관한 연구 -나들가게 서비스공간을 중심으로 -
김성진 ( Seongjin Kim ) 한국공간디자인학회 2018 한국공간디자인학회논문집 Vol.13 No.5
(Background and Purpose) The disappearance of the neighborhood supermarket, superseded by large department and convenience stores of global brands, is a gradually accelerating phenomenon. To mitigate this issue, the government, through the Small and Medium Business Administration, initiated the measure of branding small supermarkets as nadulgage to give importance to these neighborhood businesses. However, despite years of government-led efforts to revive neighborhood supermarkets, customers’ perception of nadulgage has remained low. This study aimed to raise awareness of how Korean small supermarkets are better recalled by color than any other design characteristic. (Method) This study hypothesized that brand concept image is not reflected in the colors used in the appearance of current nadulgage. Therefore, the verbal and color images that the customer perceives would need to be identified with regard to the brand concept that nadulgage stores aim to embody. To differentiate between the verbal and visual color image regarding customers’ perception of the brand concept that the nadulgage strive to portray, this study first conducted face-to-face interviews with adult men and women in the 20s 50s age group. Second, a total of 24 stimulants representing the - IRI color schemes were created and used in an experiment. Third, statistical analyses were conducted using SPSS 23.0, including positive, descriptive statistical, correlation, factor, and regression analyses, as well as ANOVA, were used as methods of statistical analysis. (Results) The verbal and color images of the brand concept ranked high by customers were in the areas of natural (N), spring-like (S), and gentle (G). In addition, these results were starkly different from the state of color application (predominance of S, GO, and D areas) of elevation signage colors in nadulgage stores in a previous study (Kim, Seongjin, 2017). The results of the analysis also showed differences in the relevant ratios between the verbal and color images for the nadulgage brand concept, with predominance observed in the same area stimulants (N, S, and G). (Conclusions) The results of this study suggest a new direction for the color plan of representative nadulgage and representative color areas (N, S, and G), which should consider customers’ recognition characteristic; the colors currently applied in nadulgage shops do not match these preferences. Meanwhile, the age group of consumers may be an important factor in determining the colors for nadulgage in the planning process. Finally, the current study is meaningful in that it conducted a survey of customers’ perception of nadulgage to shed light on the verbal and color images that express brand concept well, thereby verifying the adequate color images for nadulgage.