[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.

TOWARD TRANSFORMATIVE RESILIENCE CAPACITY: SPORT INDUSTRY AND SPORT CONSUMER SPATIAL BEHAVIOR-BASED CONSUMER RESILIENCE

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.

복합관절 날갯짓 비행체의 폴딩 메커니즘 최적설계

김성진(Seongjin Kim),황정욱(Jungwook Hwang),오웅택(Woongtaek Oh),김인래(Inrae Kim),김승균(Seungkeun Kim) 한국항공우주학회 2023 한국항공우주학회 학술발표회 논문집 Vol.2023 No.11

브랜드 콘셉트의 시각화에 관한 연구 -나들가게 서비스공간을 중심으로 -

김성진 ( Seongjin Kim ) 한국공간디자인학회 2018 한국공간디자인학회논문집 Vol.13 No.5

(연구배경 및 목적) 최근 글로벌 브랜드의 편의점과 대형마켓이 성장해가면서 소규모 동네 슈퍼마켓의 소멸 현상은 점차 가속화되고 있다. 이에 정부 중소기업청 주도로 '나들가게'라는 브랜드를 만들고 운영과 홍보를 위한 예산도 투입되었다. 그러나 정부의 이러한 수년간의 노력에도 불구하고 나들가게에 대한 소비자들의 이해와 인식은 여전히 저조하다. 본 연구의 목적은 다른 어떤 디자인 특성보다 고객에게 경제적이며 인지성에도 효과적인 디자인 요소인 컬러를 통해 나들가게가 지향하고 있는 브랜드 콘셉트를 나들가게의 외관 컬러를 통해 시각적으로 표현하여, 나들가게에 대한 이해와 인지를 제고를 위한 주요한 시사점을 제시하는 것이다. (연구방법) 나들가게가 지향하는 브랜드 콘셉트를 제시하고, 이를 고객이 생각하는 언어적 이미지와 시각적 이미지(컬러 이미지)로 각각 조사하였다. 나들가게가 표현하고자 하는 브랜드 콘셉트(정이 있어 내 집 같이 드나드는, 나들이하고 싶은 마음으로 가고 싶은 가게)에 대한 언어적 이미지와 시각적 이미지의 차이를 이해하기 위해 본 연구는 우선, 이론고찰과 20-50대 성인 남성과 여성에 대한 대면 인터뷰를 실시했다. 둘째, IRI 색 구성표를 토대로 총 24개의 색채 자극제물을 만들어 실험하였다. 셋째, 결과를 SPSS 23.0을 이용하여 기술 통계 분석, 상관 분석, 분산 분석, 요인 분석 및 회귀 분석을 수행하였다. (연구결과) 고객이 생각하는 나들가게 브랜드 콘셉트에 대한 언어 이미지와 컬러 이미지는 IRI MAP상에서 N(자연스러운), S(경쾌한), G(온화한) 영역에 공통적으로 분포했다. 그러나 이러한 결과는 선행연구에서 분석한 현재 나들가게의 와관색채에 사용되고 있는 색상 영역(S(경쾌한), GO(화려한), D (다이나믹한)과는 차이가 크다. 또한 나들가게의 브랜드 콘셉트에 대한 언어 이미지와 색채이미지가 동일한 영역(N(Natural), S(Spring) 및 G(Gentle)에 분포하는 것으로 나타났으나 그 비율에 있어서는 다소 차이가 나타났다. (결론) 본 연구의 결과는 나들가게에 대한 고객의 인지를 제고하기 위한 방안으로, 나들가게의 브랜드 콘셉트(언어적 이미지)가 외관 색채로 표현될 때 소비자가 적절하다고 생각하는 색상 영역에 대한 것이다. 결과로 도출된 (N(자연스러운), S(경쾌한) 및 G(온화한) 색상 영역은, 현재 나들가게의 외관에 사용된 색상영역과는 매우 다르다. 본 연구의 의의는 나들가게에 대한 지역 소비자의 이해와 인지를 제고하기 위한 방안으로, 나들가게에 적용되어야 하는 외관 색채계획 방향의 시사점을 제시했다는 점이다. 결과 분석을 통해 소비자의 인구통계학적 특성 중 성별보다 연령에 의해 유의미한 차이가 분석되었는데, 이는 향후 해당지역 소비자 연령이 나들가게에 적용될 색채 계획 과정에서 고려할 수 있는 요소로서 가능성을 시사하였다. 마지막으로 본 연구는 언어로 이루어진 브랜드 콘셉트를 시각적으로 표현하는 과정에서 소비자에게 이해와 인지측면에서 효과적인 색채영역을 도출하기 위해, 나들가게를 이용하는 지역 소비자를 대상으로 실험연구를 수행했다는 점에서도 의의가 있다. (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.

건설시공단계에서의 검측업무 모바일 서비스 개발

김성진(SeongJin Kim),김남곤(NamGon Kim),김태학(TaeHak Kim) 한국정보과학회 2015 한국정보과학회 학술발표논문집 Vol.2015 No.6

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.

강화도의 지질별 지하수 중 자연방사성 물질의 특성

김익현(Ikhyun Kim),김문수(MoonSu Kim),함세영(Se-Yeong Hamm),김현구(Hyunkoo Kim),김동수(Dongsoo Kim),조성진(Seongjin Jo),이헌민(Heonmin Lee),황종연(Jongyeon Hwang),조훈제(Hunje Jo),박선화(Sunhwa Park),정현미(Hyenmi Chung) 대한자원환경지질학회 2018 자원환경지질 Vol.51 No.1

인천시 강화도의 지질별(중생대 화강암, 선캠브리아 편마암, 편암) 지하수의 자연방사성 물질과 수리지화학 성분의 특성을 연구하였다. 이 연구를 위하여, 8년 동안 69개 관정에서 지하수 시료를 채수하였다. 통계 분석을 이용하여 지하수의 수리지화학 성분과 자연방사성 물질의 관계를 분석하였다. 연구 지역 지하수의 수질유형은 Ca(Na)-HCO 3 형으로 나타났다. 우라늄은 3 개 지하수 시료에서 US EPA의 MCL(최대 오염 물질 수준)인 30 ug/L을 초과하였다. 라돈은 28개 지하수 시료에서 US EPA의 제안치인 AMCL(대체 최대 오염 물질 수준)인 4,000 pCi/L을 초과하였다. 모든 지하수 시료의 전알파(Gross-alpha)는 US EPA MCL인 15 pCi/L를 초과하지 않았다. 지하수에서의 우라늄과 라돈의 평균농도는 화강암에서 가장 높고, 그 다음으로 편마암, 편암의 순이다. 편암 지역의 라돈은 HCO 3 와 –0.40, 우라늄은 SO 4 과 0.54의 상관계수를 보였고, 편마암 지역의 경우 라돈은 우라늄과 0.55, 우라늄은 SO 4 과 0.41의 상관계수를 보였다. 요인분석에 의하면, 지질별로 각각 다른 거동특성을 가진다. 전체 지하수의 통계 분석 결과, 우라늄과 라돈 그리고 지화학 성분들 간에는 대체로 특이한 상관성을 나타내지 않았다. 자연방사성 물질의 거동과 운명을 보다 명확하게 이해하기 위해서는 자연방사성 물질의 수리지질학적, 지구화학적, 지질학적 특성에 대한 보다 상세한 연구가 요구된다. Groundwaters in different rock types (Mesozoic granite, Precambrian gneiss, and schist) of Ganghwa island, Incheon City were characterized by using naturally occurring radioactive materials (NORM) and hydrogeochemical constituents. For the study, groundwater samples from 69 wells had been collected over eight years. Statistical methods were applied to relate hydrogeochemical components and NORM in the groundwater samples. The groundwater samples belonged to Ca(Na)-HCO 3 types. The uranium concentrations in three groundwater samples exceeded 30 ug/L of United States Environmental Protection Agency (US EPA) maximum contaminant level (MCL). The radon concentrations in 28 groundwater samples exceeded 4,000 pCi/L (picocuries per Liter) of US EPA alternative maximum contaminant level (AMCL). Gross-alpha in all the groundwater samples did not exceed 15 pCi/L of US EPA MCL. The average concentrations of uranium and radon in groundwater were the highest in granite area, and then gneiss, schist areas in order. In schist area, the correlation coefficient (R) between radon and HCO 3 is –0.40 and R between uranium and SO 4 is 0.54. In gneiss area, the R between radon and uranium is 0.55 and the R between uranium and SO 4 is 0.41. According to factor analysis, each geological area shows different chemical characteristics. The statistical analysis of whole groundwater resulted in nearly no significant relationship among uranium, radon and chemical constituents. Subsequently, more detailed studies on hydrogeological, geochemical, and geological characteristics related to NORM are required to better understand the behavior and fate of NORM.

노면 상태 관측을 위한 강인관측기의 실험적 고찰

김형래(Hyeongrae Kim),강종모(Jongmo Kang),김대현(Daehyeon Kim),김주연(Juyeon Kim),김영진(Youngjin Kim),임성진(Seongjin Yim),박기준(Kijun Park),오동호(Dongho Oh) 대한기계학회 2023 대한기계학회 춘추학술대회 Vol.2023 No.5

궤도/노반 차상모니터링을 위한 모델오차 보상을 고려한 관측기 설계

김형래(Hyeongrae Kim),김대현(Daehyeon Kim),김주연(Juyeon Kim),김영진(Youngjin Kim),임성진(Seongjin Yim),박기준(Kijun Park),오동호(Dongho Oh) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.4

식사 전후의 사진 비교를 통한 스마트폰 앱의 영양소섭취량 타당도 평가

이혜진(Hyejin Lee),김은빈(Eunbin Kim),김수현(Su Hyeon Kim),임하은(Haeun Lim),박영미(Yeong Mi Park),강준호(Joon Ho Kang),김희원(Heewon Kim),김진호(Jinho Kim),박웅양(Woong-Yang Park),박성진(Seongjin Park),김진기(Jinki Kim),양윤정(Yoon Jun 한국영양학회 2020 Journal of Nutrition and Health Vol.53 No.3

본 연구는 만 19세 이상 60세 미만 성인남녀 98명을 대상으로 스마트폰 앱인 Gene-Health을 이용하여 식사 기록을 통해 분석된 영양소섭취량과 동일한 날의 식사 섭취 전과 후의 사진비교를 통해 섭취량을 추정하여 분석된 영양소섭취량을 비교함으로 Gene-Health의 타당도를 조사하기 위해 수행되었다. 주요 결과는 다음과 같다. 첫째, Gene-Health의 영양소섭취량과 사진을 통해 추정한 영양소섭취량을 비교한 결과 에너지, 탄수화물, 지방, 지방으로부터의 에너지 섭취비율은 통계적으로 유의한 차이가 없었으나 단백질 섭취량과 단백질로부터의 에너지 섭취 비율은 Gene-Health가 높았고, 탄수화물로부터의 에너지 섭취비율은 사진추정군이 높았다. 둘째, Gene-Health와 사진을 통한 영양소섭취량의 상관성은 에너지, 탄수화물, 단백질, 지방섭취량과 탄수화물 비율, 단백질 비율, 지질 비율은 모두 상관계수 0.382–0.708로 유의적인 양의 상관관계를 보였다. 셋째, Gene-Health와 사진을 통한 에너지, 탄수화물, 단백질, 지방섭취량과 탄수화물 비율, 단백질 비율, 지질 비율의 가중 카파 계수는 0.588–0.662로 상당히 일치하는 경향을 보였다. 에너지와 다량영양소, 다량영양소 섭취비율의 same agreement는 41.8%–48.0%이며 adjacent agreement는 75.5%–88.8%였다. 본 연구를 통하여 Gene-Health는 에너지와 다량영양소 섭취량을 추정하기 위한 타당한 도구라고 사료된다. 추후 연구에서는 다양한 연령과 여성 참가자를 확대하여 성별과 연령에 따른 Gene-Health의 타당도를 연구할 필요가 있다. Purpose: This study was conducted to evaluate the validity of the Gene-Health application in terms of estimating energy and macronutrients. Methods: The subjects were 98 health adults participating in a weight-control intervention study. They recorded their diets in the Gene-Health application, took photographs before and after every meal on the same day, and uploaded them to the Gene-Health application. The amounts of foods and drinks consumed were estimated based on the photographs by trained experts, and the nutrient intakes were calculated using the CAN-Pro 5.0 program, which was named ‘Photo Estimation’. The energy and macronutrients estimated from the Gene-Health application were compared with those from a Photo Estimation. The mean differences in energy and macronutrient intakes between the two methods were compared using paired t-test. Results: The mean energy intakes of Gene-Health and Photo Estimation were 1,937.0 kcal and 1,928.3 kcal, respectively. There were no significant differences in intakes of energy, carbohydrate, fat, and energy from fat (%) between two methods. The protein intake and energy from protein (%) of the Gene-Health were higher than those from the Photo Estimation. The energy from carbohydrate (%) for the Photo Estimation was higher than that of the Gene-Health. The Pearson correlation coefficients, weighted Kappa coefficients, and adjacent agreements for energy and macronutrient intakes between the two methods ranged from 0.382 to 0.607, 0.588 to 0.649, and 79.6% to 86.7%, respectively. Conclusion: The Gene-Health application shows acceptable validity as a dietary intake assessment tool for energy and macronutrients. Further studies with female subjects and various age groups will be needed.