후막 Na β"-Alumina 복합 고체 전해질 및 Gel-Type 유황 양극을 활용한 상온형 Na-S 전지의 특성 평가

이진실,유학균,이윤기,김재광,주종훈,Lee, Jinsil,Yu, Hakgyoon,Lee, Younki,Kim, Jae-Kwang,Joo, Jong Hoon 한국전기전자재료학회 2020 전기전자재료학회논문지 Vol.33 No.5

In this study, we introduce a Na β"-alumina composite thick film as a solid electrolyte, to reduce the resistance of electrolyte for a Na/S battery. An alumina/zirconia composite material was used to enhance the mechanical properties of the electrolyte. A solid electrolyte of about 40 ㎛ thick was successfully fabricated through the conversion and tape-casting methods. In order to investigate the effect of the surface treatment process of the solid electrolyte on the battery performance, the electrolyte was polished by dry and wet processes, respectively, and then the Na/S batteries were prepared for analyzing the battery characteristics. The battery with the dry process performed much better than the battery made with the wet process. As a result, the battery manufactured by the dry process showed excellent performance. Therefore, it is confirmed that the surface treatment process of the solid electrolyte has an important effect on the battery capacity and coulombic efficiency, as well as the interface reaction.

외식업체 종사자의 조미료 및 감미료 사용에 대한 인식 조사

이진실,이나영,박대섭,홍정연,황혜선,백진경,권용석,최승균,홍완수,Lee, Jin-Sil,Yi, Na-Young,Park, Dae-Seop,Hong, Jeong-Yeon,Hwang, Hye-Sun,Paik, Jin-Kyung,Kwon, Yong-Seok,Choi, Seung-Gyun,Hong, Wan-Soo 한국식품조리과학회 2012 한국식품조리과학회지 Vol.28 No.5

The purpose of this study was to investigate the perceptions of the foodservice industry workers in regard to the use of seasonings and sweeteners in the restaurants. Questionnaires were distributed to 902 foodservice workers of various restaurants. Participants were questioned on their perceptions of both natural and artificial seasonings & sweeteners. Furthermore, they were asked to respond to questions regarding the need of public education and information about the use of seasonings and sweeteners, along with the demographic information. The results showed that 65.7% of respondents used both the artificial seasoning and artificial sweeteners, while 9.9% of respondents used only natural seasonings and sweeteners. The restaurant employees answered that they have tried to reduce the use of artificial seasonings and sweeteners(3.69/5 point). Some of the respondents reported that they have tried to increase the used of natural seasonings and sweeteners(3.54/5 point). There were significant differences in the respondents' perceptions and attitudes on the seasonings and sweeteners by the restaurant type(p<0.05). The respondents perceived the need for education on the safety of artificial seasonings and sweeteners(3.71/5point) and the production process of natural seasonings(3.75/5 point). There was no significant difference in the respondents' perceptions on the need for education of the seasonings and sweeteners by the restaurant type. The findings suggest that education regarding the use of artificial seasoning and artificial sweeteners, as well as cooking methods that use natural seasonings, is needed to reduce the use of artificial seasonings and sweeteners in restaurants.

공간지향형 내러티브와 인플래터블 아키텍쳐를 이용한 도시 미디어 아트

이진실(Jinsil lee),김상욱(Sangwook Kim) 한국HCI학회 2017 한국HCI학회 학술대회 Vol.2017 No.2

공간지향형 내러티브는 전시, 관람이 이루어지는 물리적인 전시 설치물과 전시 공간을 하나의 내러티브로 전달하려는 의도로 고안 되었다. 일반적인 오브젝트 형태로 이루어진 예술 작품의 경우, 관람자는 전시공간에 설치된 예술작품의 외형을 관람하는 것으로 관람을 마친다. 그러나 공간 지향적 내러티브는 외부적인 예술관람 뿐 아니라, 관람자가 예술 설치물의 내부로 들어가 공간적인 이동과 공간속의 내러티브를 경험하며 관람의 폭을 다양하고 깊이 있게 접할 수 있다. 이를 위해 제작과 이동이 용이한 비닐 소재의 인플래터블을 하나의 예술적 건축물로 설치하고 영상 혹은 가상현실의 이미지로 제작된 영상을 프로젝션하여 관람자가 예술적 의도에 몰입할 수 있는 환경을 구성하여, 관람자의 공간적 이동 흐름을 따라 비선형적(nonlinear)이며 병렬적 형태의 내러티브를 경험하도록 제작할 수 있다. 또한 공간지향적 예술적 표현은 일상적 도시공간의 예술적 변용을 자연스럽게 유발하고, 도심의 공간을 예술적 표현의 공간으로 공간적 전회를 발생시켜 도심 속의 미디어 아트의 방향성을 제시할 수 있다.

3T3 세포에 의한 피브로인 마이크로스피어의 흡수

이진실(Jin Sil Lee),고남경(Nam Kyung Go),이신영(Shin Young Lee),허원(Won Hur) 한국생물공학회 2014 KSBB Journal Vol.29 No.5

Vehicle toxicity is one of the main obstacles for intracellular delivery of bioactive compounds. Silk fibroin is a natural polymer proven to have high biocompatibility since being used as suture material. In this report, fibroin microspheres were prepared without any chemical modification or cross-linking not to affect its biocompatibility. The microspheres were taken up by more than 90% of 3T3 cells. Cellular uptake continued after medium replenishment with a different-colored fluorescent microsphere, suggesting that simultaneous ingestion and exocytosis occurred. Cellular uptake of fibroin microspheres did not affect cell viability. Intracellular trafficking of the microspheres using lysosome-specific fluorescent dye revealed that fibroin microspheres were localized both in the cytoplasm and in the lysosome. Accordingly, fibroin microspheres can be a potential vehicle for intracytoplasmic delivery of large cargos, such as mixtures of proteins, nutrients or artificial organelles.

다양한 구조를 가진 알긴산-피브로인 비드 제조

이진실(Jin Sil Lee),이신영(Shin-Young Lee),허원(Won Hur) 한국생물공학회 2011 KSBB Journal Vol.26 No.5

Alginate bead has been supplemented with various polymers to control permeability and to enhance mechanical strength. In this report, fibroin-reinforced alginate hydrogel was prepared, in which spatial localization of fibroin molecules was investigated. Confocal laser scanning microscopy revealed that fibroin molecules formed a fibrous network in the alginate-fibroin beads, which was expected to enhance mechanical strength as same as in many composite materials. Uniaxial compression test showed that fibroin-reinforced alginate beads had increased mechanical strength only after methanol treatment that caused β-sheet formation among fibroin molecules. Simultaneous curing and dialysis of alginate beads were carried out to remove excesscalcium but to retain fibroin in the dialysis chamber, which fabricated beads without internal fibrous fluorescent stains. Fibroin molecules were only found beneath the surface of the beads. The fibroin-diffused shell was further processed to form a thick wall after drying or was mobilizedto the centre of the bead by methanol treatment. Accordingly, the structure analyses provide processing methods of fibroin to form a wall or center clumps, which could be applied to design controlled delivery device.

인터렉티브 아트의 초현실적 표현

이진실(Jinsil Lee),김상욱(Sangwook Kim) 한국콘텐츠학회 2016 한국콘텐츠학회 종합학술대회 논문집 Vol.2016 No.5

매개변인이 포함된 구조방정식모형에서 공변인 통제를 위한 모형설정 방법 비교: 모의실험 연구

이진실(Lee, Jinsil) 한국청소년정책연구원 2019 한국청소년연구 Vol.30 No.3

청소년학 분야에서 많이 활용되고 있는 매개변인이 포함된 구조방정식모형에서 공변인 통제를 위한 모형설정 방법을 비교하여, 타당한 모형설정 방법을 확인하였다. 변인 간 인과관계를 분석하기 위해서는 공변인 통제가 중요함에도 그동안의 구조방정식모형을 적용한 연구들에서는 공변인이 고려되지 않거나 공변인에 대한 모형설정 방법의 근거가 제시되지 못한 경우가 많았다. 이에 본 연구에서는 구조방정식모형에서 공변인을 적절하게 통제할 수 있는 모형설정 방법을 제안하고자 하였다. 이를 위해 모의실험을 실시하였고, 5가지 모형설정 방법에 따라 효과추정치의 정확성 및 모형적합도에 어떠한 차이가 있는지를 비교하였다. 연구결과, 통제 전 모형(모형1: NC model)은 모형적합도는 양호하였지만, 모든 개별 효과추정치 및 매개효과, 직접효과, 총 효과가 모두 부정확하게 추정되었다. 결과변인 통제 모형(모형2: OC model)과 외생변인 상관-결과변인 통제 모형(모형3: COC model)에서는 직접효과는 정확하게 추정되었으나, 외생 독립변인이 매개변인에 미치는 효과가 부정확하게 추정되고 이로 인해 매개효과 및 총 효과가 부정확하게 추정되는 것으로 나타났다. 매개변인 통제-결과변인 통제 모형(모형4: MOC model)은 효과추정치는 모두 정확하게 추정되었으나, 모형적합도가 양호하지 않은 경우가 있었다. 외생변인 상관-매개변인 통제-결과변인 통제 모형(모형5: CMOC model)에서는 모든 개별 효과추정치 및 매개효과, 직접효과, 총 효과 모두 정확하게 추정되었으며 모든 조건에서 모형적합도도 매우 양호하게 나타나, CMOC 모형이 구조방정식모형에서 공변인 통제를 위한 가장 적절한 모형설정 방법임을 확인하였다. The purpose of this study was to compare methods of model specification to control covariates in mediation analysis with structural equation modeling. In order to do this, monte carlo simulation was conducted. In this study, five models were compared, and each model was evaluated based on both the accuracy of estimates and model fit. The results showed that when the NC(Non Control) model was applied, model fit was good, however, estimates of mediation effect, direct effect, and total effect were all found to be biased. In terms of both the OC(Outcome Control) model and the COC(Correlated Outcome Control) model, estimates of mediation effect and total effect were biased. Additionally, model fit was found to be unacceptable in both the OC model and the COC model. When the MOC(Mediator-Outcome Control) model was applied, the estimates were unbiased, but under certain conditions, model fit was unacceptable. In the CMOC model, estimates of mediation effect, direct effect, and total effect were all unbiased, and model fit was good. Based on these results, for the purposes of controlling covariates in mediation analysis, the CMOC model was suggested as being the most appropriate.

문구가 각인된 보안경의 시야 차폐 평가 방법에 관한 연구

이진실(Jinsil Lee),윤정민(Jungmin Yun),박경용(Kyoungyong Park),김민선(Min-Sun Kim) 대한인간공학회 2019 대한인간공학회 학술대회논문집 Vol.2019 No.10

W/O 에멀젼에서 피브로인 분자의 회합 및 응집에 의한 미세구의 형성

이진실(Jin Sil Lee),김지영(Ji Young Kim),허원(Won Hur) 한국고분자학회 2016 폴리머 Vol.40 No.6

실크섬유의 구성단백질인 피브로인은 물에 녹지 않으나 고온의 염용액에 녹는다. 염용액을 투석하면 피브로인 수용액이 얻어지고, 시간이 경과하면 젤이 형성된다. 본 연구에서는 젤 형성 중간단계에 존재하는 피브로인 분자회합체를 광산란법으로 분석하였고, 시간의 경과에 따라 그 크기가 증가하는 것을 확인하였다. 피브로인 수용액에 데칸과 계면활성제를 섞어 유상수적(W/O)형의 에멀젼을 만들고 감압 건조시켜 미세구를 제조하였다. 피브로인 미세구는 매끄러운 표면의 구형을 유지하고 있으며, 수용액이나 식염수에 보관해도 불용성 상태를 유지하였다. 미세구의 불용성과 형태 안정성에 기여하는 피브로인 분자사슬의 β-sheet 구조와 결정성 영역을 적외선 분광 스펙트럼과 X선 회절 분석을 이용하여 확인하였다. Fibroin is an insoluble protein polymer of silk fiber but undergo solubilization in a hot salt solution. The fibroin-salt solution was dialyzed to obtain an unstable aqueous fibroin, eventually turned to gel. Molecular association of aqueous fibroin and their growth were detected by dynamic light scattering. Fibroin microspheres were prepared by dehydration of W/O emulsion from aqueous fibroin, mixed with decane and detergents. Scanning electron microscopy showed that fibroin microspheres have the smooth surface. The fibroin microspheres remain insoluble in water as well as in saline without any significant swelling. FTIR and XRD were used to detect the presence of β-sheet structure formed by hydrogen bonds between fibroin molecules in an orderly manner.

자성기반 가중응집제를 이용한 고탁도 물질 제거 특성

이진실(Lee, Jinsil),박성준(Park, Seongjun),김종오(Kim, Jong-oh) 한국지반환경공학회 2017 한국지반환경공학회 학술발표회논문집 Vol.2017 No.9