문화도시조성사업이 지역경제에 미치는 영향에 관한 연구

최지연,Choi, Ji-Yeon 한국전자통신학회 2012 한국전자통신학회 논문지 Vol.7 No.2

문화는 도시경쟁력의 원천과 시민의 삶의 질 향상에 필수적인 요소이다. 현대사회는 지속적 경제성장과 도시재생을 위한 목적으로 문화산업과 결합하여 좀 더 지역적이고 창의성이 발현될 수 있는 도시를 만들고자 한다. 이러한 문화도시조성사업은 기반시설 건설 운영으로 인하여 생산, 고용, 그리고 소득의 인프라를 구축하였고, 역사 문화재에 대한 시민의식을 고취시켰다. 또한, 민족 문화 정체성 및 가치를 향상시켜 국가적 측면에서 효과적인 방안을 제시하였다. Culture is the essential requisite to improve the resource of city competitiveness and the quality of life. The modern society hope to make the city, more regional and able to be expressed creativity, combining with culture industries for the purpose continuous economic growth and regeneration city. This development industry of cultural city constructed employment and the production of income due to the operations by infra-construction. And It inspired civic awareness about Cultural History. In addition, It presented the effective direction of national aspects caused by improving the identity and the value of ethnicity, culture.

다환방향족 탄화수소(PAHs) 오염토양의 과황산 산화 시 철 활성화제의 영향

최지연,박정도,신원식,Choi, Jiyeon,Park, Jungdo,Shin, Won Sik 한국지하수토양환경학회 2020 지하수토양환경 Vol.25 No.1

PAHs commonly found in industrial sites such as manufactured gas plants (MGP) are potentially toxic, mutagenic and carcinogenic, and thus require immediate remediation. In-situ chemical oxidation (ISCO) is known as a highly efficient technology for soil and groundwater remediation. Among the several types of oxidants utilized in ISCO, persulfate has gained significant attention in recent years. Peroxydisulfate ion (S₂O₈^2-) is a strong oxidant with very high redox potential (E⁰ = 2.01 V). When mixed with Fe²⁺, it is capable of forming the sulfate radical (SO₄^-·) that has an even higher redox potential (E⁰ = 2.6 V). In this study, the influence of various iron activators on the persulfate oxidation of PAHs in contaminated soils was investigated. Several iron sources such as ferrous sulfate (FeSO₄), ferrous sulfide (FeS) and zero-valent iron (Fe(0)) were tested as a persulfate activator. Acenaphthene (ANE), dibenzofuran (DBF) and fluorene (FLE) were selected as model compounds because they were the dominant PAHs found in the field-contaminated soil collected from a MGP site. Oxidation kinetics of these PAHs in an artificially contaminated soil and the PAH-contaminated field soil were investigated. For all soils, Fe(0) was the most effective iron activator. The maximum PAHs removal rate in Fe(0)-mediated reactions was 92.7% for ANE, 83.0% for FLE, and 59.3% for DBF in the artificially contaminated soil, while the removal rate of total PAHs was 72.7% in the field-contaminated soil. To promote the iron activator effect, the effects of hydroxylamine as a reducing agent on reduction of Fe³⁺ to Fe²⁺, and EDTA and pyrophosphate as chelating agents on iron stabilization in persulfate oxidation were also investigated. As hydroxylamine and chelating agents (EDTA, pyrophosphate) dosage increased, the individual PAH removal rate in the artificially contaminated soil and the total PAHs removal rate in the field-contaminated soil increased.

골유착성 치과 임플란트의 생존율에 관한 임상적 연구

최지연,고세욱,류현욱,Choi, Ji-Yeon,Koh, Se-Wook,Ryu, Hwun-Wook 대한악안면성형재건외과학회 2009 Maxillofacial Plastic Reconstructive Surgery Vol.31 No.4

Objectives: The aim of the present review was to evaluate survival rate and various factors associated with survival of osseointegrated implants. Patients and methods: The clinical comparisons were performed to evaluate survival rate of 794 endosseous implants that had been inserted between 2004 through 2008 in relation to sex and age of patients, position of implant, implant system and surface characteristics, length and diameter of implant, and bone graft technique. Results: The survival rate of implant was 94.3% in posterior area of maxilla and 98.6% in posterior area of mandible by position of implant, a statistically significant difference. As to diameter of implant, survival rate was 98.4% between the 4.0 and 4.5 mm and 75.0% in larger than 5.0 mm, that was statistically significant difference. There was a statistically significant difference regard to bone graft and surgical technique. The implant survival rate was 89.0% in a placement site which performed sinus lifting, and in case of implant placement with guided bone regeneration technique and without bone grafting was 97.6% and 100% each. Conclusion: According to these findings, this study establishes a relationship between survival rate of implant and position, surface characteristics, diameter of implant and bone graft technique.

시뮬레이션을 이용한 성형외과 예약패턴 분석

최지연,정예림,박선주,정승화,Choi, Jiyeon,Chung, Yerim,Park, Sunju,Chung, Seungwha 한국시뮬레이션학회 2018 한국시뮬레이션학회 논문지 Vol.27 No.1

Generally, solutions that can increase patients' satisfaction are in conflict with the solutions that can increase the satisfaction and profitability of the medical personnels. In this paper, we compare appointment patterns using multiple performance measures that take into account both hospital's position and customers' position, and propose the best appointment pattern especially for an efficient scheduling in a plastic surgery clinic. A simulation model using ARENA is designed based on real hospital data. Based on this model, we compare 5 appointment patterns. To check the robustness of the appointment patterns, we have experimented on various appointment situations by considering peak, extreme peak seasons, and peak, off-peak days. We found that Triangle-like pattern turned out to be most efficient regardless of appointment situations. 일반적으로 고객의 만족도를 높이는 방안은 병원의 이익 및 병원 의료진들의 만족도를 높이는 방안과는 상충된다. 이에 본 논문은 병원과 고객을 함께 고려한 평가지표를 사용하여 여러 가지 예약 패턴들을 비교해보고 병원의 효율적인 운영을 위해 성형외과에 적절한 예약 패턴을 제안하고자 한다. 본 논문에서는 도심에 위치한 실제 성형외과의 고객 및 진료 데이터를 이용해 시뮬레이션 모델을 설계하고, 이 모델을 대상으로 5가지 예약 패턴을 비교하였다. 예약 패턴의 강건성을 체크하기 위하여 성수기와 극성수기, 피크 요일과 한적한 요일 등 다양한 상황 하에서 실험을 진행하였다. 실험 결과, 본 연구에서 새롭게 제안하는 Triangle-like Pattern이 예약 수와 관계없이 가장 좋은 결과를 보여주었다.

토양내 오염된 2,4,6-trinitrotoluene (TNT)의 Eisenia fetida에 대한 독성 및 생물흡수

최지연,오상화,신원식,Choi, Jiyeon,Oh, Sanghwa,Shin, Won Sik 한국지하수토양환경학회 2015 지하수토양환경 Vol.20 No.6

Toxicity and uptake of 2,4,6-trinitrotoluene (TNT) in three different soils (OECD soil, natural soil and loess) to earthworm (Eisenia fetida) were investigated at several different spiked concentrations of TNT (0 to 200 mg/kg for OECD and natural soils, and 0 to 35 mg/kg for loess) and for different exposure periods (7, 14, 21, and 28 d). The LC<SUB>50</SUB> values for 7 d exposure were 160.1, 159.4, and 28.81 mg/kg for OECD soil, natural soil, and loess, respectively. The LC<SUB>50</SUB> values for 14, 21, and 28 d exposure were almost the same as those for 7 d exposure, showing that 7 d exposure time was enough to decide the toxicity (LC<SUB>50</SUB>) of TNT to Eisenia fetida, because the highest concentration of TNT in earthworm body was observed within around 5 d. The LC<SUB>50</SUB> and uptake of TNT in loess were higher than those in OECD and natural soil. The uptake of TNT to the earthworm were correlated well with the initial concentration of TNT in the soil and TNT porewater concentration (R<SUP>2</SUP>> 0.9 in OECD, natural, and loess). The concentration of TNT in earthworm body decreased after 5 d, possibly caused by natural degradation of TNT by soil bacteria as well as earthworm.

톱밥배지에서 재배된 표고버섯 품종별 이화학적 성분 비교

최지연,김민선,Choi, Ji Yeon,Kim, Min-Sun 한국버섯학회 2021 한국버섯학회지 Vol.19 No.3

표고버섯은 톱밥배지 재배기술의 발달로 세계적으로 가장 많이 생산되고 식용되는 버섯이며, 톱밥배지를 이용하여 재배된 표고버섯의 생산량이 늘고 있다. 본 연구에서는 톱밥재배 표고버섯의 품종별 식품학적 차이를 비교하고자 동일 조건에서 재배된 산조701호, 산조707호, 산조 715호, 참아람, L808 총 5품종 표고버섯의 일반성분, 영양성분 및 항산화 활성을 분석하였다. 동결건조된 표고버섯의 일반성분 함량은 회분 4.06~5.92 g/100 g, 조지방 0.75~1.02 g/100 g으로 품종별 차이가 크지 않았으나 조단백질은 21.24~29.15 g/100 g으로 품종간의 유의적 차이를 보였다. Trehalose는 산조701호에서 9.60±0.08 g/100 g으로 가장 높은 함량으로 확인되었다. 총 아미노산 조성은 glutamic acid>aspartic acid>leucine 순으로 높은 분포를 보였으며, 유의적 차이를 보인 아미노산은 glycine, alanine, valine, isoleucine, leucine, phenylalanine이었으며 산조707호, 산조715호, 산조701호, 참아람, L808 순으로 높은 함량을 보였다. 물 추출물의 총 폴리페놀 함량과 총 플라보노이드 함량은 산조715호가 3.49±0.04 mg GAE/g, 1.33±0.03 mg QE/g으로 가장 높게 나타났으며 다른 품종들과 유의적 차이를 나타내었다. 같은 톱밥배지와 환경에서 재배된 표고버섯 5 품종간의 유의적 차이가 확인된 성분은 조단백질, trehalose, 6종의 아미노산이었다. 하지만 한 곳의 임가에서 재배된 표고버섯 품종간의 비교 결과로, 품종별 시료 수를 확대한 추가실험을 통하여 품종간의 구별 가능성을 더욱 세부적으로 검토할 필요가 있다. With the development of sawdust medium cultivation technology, Lentinula edodes (shiitake mushroom) has become the most extensively produced and consumed mushroom globally. In this study, the approximate composition, nutritional components, and bioactive compounds of L. edodes were analyzed and compared for the five sawdust-cultivated shiitake mushrooms cultivars namely Sanjo701ho, Sanjo707ho, Sanjo715ho, Chamaram, and L808. The approximate range of the composition of freeze-dried shiitake mushrooms was 4.06-5.92 g/100 g of ash, 0.75-1.02 g/100 g of crude fat, and 21.24-29.15 g/100 g of crude protein. Sanjo701ho had the highest trehalose content (9.60±0.08 g/100 g), total polyphenol content (3.49±0.04 mg GAE/g), and total flavonoid content (1.33±0.03 mg QE/g) among the other shiitake mushroom cultivars. The total amino acid content was as follows: glutamic acid>aspartic acid>leucine. Glycine, alanine, valine, isoleucine, leucine, and phenylalanine contents were significantly decreased in the following sequence: Sanjo707ho, Sanjo715ho, Sanjo701ho, Chamaram, and L808. Crude protein, trehalose, and six types of amino acids were identified as classification indicators for the five cultivars of sawdust-cultivated shiitake mushrooms.

캐릭터 육성 게임을 통한 수면 건강관리

최지연(Choi Jiyeon),정찬영(Jung chanyeong),최영주(Choi youngju),최은진(Choi Eunjin),신혜원(Sin hyewon),광휘(TRUONG QUANGHUY),박세진(Park Sejin) 한국정보기술학회 2023 Proceedings of KIIT Conference Vol.2023 No.6

초등학교 예비교사의 에너지와 기후변화에 대한 인식: 개념도 분석

최지연 ( Jiyeon Choi ) 한국교원대학교 초등교육연구소 2015 초등교과교육연구 Vol.23 No.-

The purpose of this study was to investigate the concepts of the energy and climate change of elementary pre-service teachers. This allowed you to check the misunderstanding of pre-service teachers energy climate change issues, energy, you want to derive or suggestions proceeds as how climate change education. The participants were five pre-service teachers in an university of education. They showed pictures of the energy and climate change a conceptual diagram for 10 minutes. A result of the this analysis were as follows. The first, Five pre-teachers were constructed averaged 43.8 pieces of concept about energy. Secondly, they were configured to average 48.2 concepts piece on climate change. This average was more than 39.0 pieces are constructed elementary school students. Third, the concept was very well organized by the teachers. It could be categorized as a cause, result, measures.

프로젝트 기반 수업에서 문제해결력과 정의적 성취 간 관계

최지연(Jiyoun Choi),강서울(Seoul Kang) 한국열린교육학회 2024 열린교육연구 Vol.32 No.3

본 연구는 프로젝트 기반 수업을 진행하는 마이스터고의 재학생을 대상으로 문제해결력, 협력적 자기효능감, 정의적 성취의 상관관계를 알아보고 문제해결력과 정의적 성취 관계에서 협력적 자기효능감이 어떠한 매개효과를 가지는지를 검증하였다. 마이스터고 재학생 160명을 대상으로 SPSS, Process Macro Model 4를 활용하여 분석한 결과 종속변인인 정의적 성취와 독립변인인 문제해결력(문제해결자신감, 접근회피스타일), 매개변인인 협력적 자기효능감은 모두 유의미한 상관관계가 있는 것으로 확인되었다. 또한 협력적 자기효능감은 문제해결력과 정의적 성취 사이에서 완전매개하는 것으로 나타났으며 문제해결력의 하위 요인인 문제해결자신감과 접근회피스타일 역시 같은 결과로 나타났다. 분석 결과를 바탕으로 성공적인 프로젝트 기반 수업을 위해서는 협력적 자기효능감이 매우 중요한 요소로 작용한다는 점을 알 수 있었으며, 그에 따른 교수 방법론적 시사점을 제언하였다. The purpose of this study was to investigate the correlation between problem-solving abilities, self-efficacy for group work, and affective achievements and examine the mediating effect of self-efficacy for group work in the relationship between problem-solving abilities and affective achievements targeting Meister high schools which conduct project-based learning. Analyzing 160 Meister High School students using SPSS and Process Macro Model 4, the result shows that the dependent variable, which is affective achievement, the independent variable, which is the problem-solving ability (problem-solving confidence and approach-avoidance style), and the mediating variable, which is self-efficacy for group work, show a significant correlation. In addition, self-efficacy for group work is completely mediated between problem-solving abilities and affective achievement, and sub factors of problem-solving abilities which are problem-solving confidence and approach-avoidance style are as well. Based on the results, it is found that self-efficacy for group work is a very important factor for successful project-based learning. And then, implications from the teaching methodological side are suggested.

돌나물의 항균활성 및 위암예방효과

최지연 ( Ji Yeon Choi ),김혜민 ( Hye Min Kim ),목소연 ( So Youn Mok ),최경 ( Kyung Choi ),구자정 ( Ja Jung Ku ),박광우 ( Kwang Woo Park ),조은주 ( Eun Ju Cho ),이상현 ( Sang Hyun Lee ) 한국응용생명화학회(구 한국농화학회) 2012 Journal of Applied Biological Chemistry (J. Appl. Vol.55 No.3

The aim of this research was to investigate the industrialapplication of Sedum sarmentosum. Antibacterial activities of then-hexane, methylene chloride (MC), ethyl acetate, and n-butanolfractions of S. sarmentosum were tested against Escherichia coli,Staphylococcus aureus, and Helicobacter pylori. The MC fractionshowed the strongest antibacterial activity against E. coli, with aninhibition zone greater than 13mm in disc assays. At 100ug/mL all fractions scavenged more than 50% of 1, 1-diphenyl-2-picrylhydrazyl (DPPH) and hydroxyl radicals (·OH). In particular,the MC fraction showed the strongest scavenging activity against DPPH and ·OH. In addition, we found that treatment with the MC fraction inhibited the growth of H. pylori and gastric adenocarcinomacells. The present results suggest that the MC fraction of S sarmentosum would play the promising protective role againstpathogenic bacteria and free radicals.