주의와 양안 통합 지각 학습이 양안 간 억제 불균형 감소에 미치는 영향

이은빈,장지웅,정상철 한국인지및생물심리학회 2018 한국심리학회지 인지 및 생물 Vol.30 No.4

People, who have a large difference in visual acuity between the two eyes, have trouble in binocular integration because of imbalanced interocular suppression which occurs before binocular summation (Meese, Georgeson, & Baker, 2006). To reduce imbalanced interocular suppression, the current study first compared three SED–measurement methods suggested by previous studies (Experiment 1). In Experiment 2, we selected participants who had large imbalance of interocular suppression by using Xu, He, and Ooi (2012)’s method which had the highest reliability and reflected the other visual abilities better than the other methods in Experiment 1. Those who were selected participated in Experiment 3, designed to reduce imbalance of interocular suppression by using a push-pull protocol (Xu, He, & Ooi, 2010) and perceptual learning of binocular integration (Hess, Mansouri, & Thompson, 2010). We found both training methods were effective in reducing imbalance of interocular suppression. The effect of non-dominant eye-specific attention was manifested in two different ways: facilitating information processing of a non-dominant eye and suppressing a dominant eye for faster emergence of significant reduction of the interocular suppression. Our results suggest that non-dominant eye-specific attention plays a critical role in reducing imbalanced interocular suppression. 두 눈의 시력차가 큰 약시 환자들의 경우 양안 간 불균형적인 억제로 인해 양안 통합에 어려움을 겪는다(Meese, Georgeson, & Baker, 2006). 이를 해소하기 위해 본 연구에서는 먼저 양안 간 억제 측정법들을 상호 비교하였다(실험 1). 이 중 신뢰도가 가장 높으며, 다른 시각 기능을 가장 잘 반영하는 측정법(Xu, He, & Ooi, 2010; 실험 1)을 활용해 정상군 중 일정 수준 이상의 양안 간 불균형적인 억제를 형성하고 있는 참가자를 선정했다(실험 2). 그 후 Xu 등(2010)의 푸시풀 지각 학습법과 Hess, Mansouri, 및 Thompson(2010)의 양안 통합 지각 학습법을 이용해 양안 간 불균형적인 억제를 감소시키고자 했다(실험 3). 실험 결과 두 지각 학습법 모두 비슷한 정도로 양안 간 억제의 불균형을 감소시켰다. 또한 푸시풀 지각 학습법의 비우세안 특정적인 주의는 비우세안에 제시되는 자극의 정보 처리를 촉진시켰고, 우세안이 비우세안을 억제하는 정도를 감소시킴으로써 양안 간 억제의 불균형 감소가 신속하게 나타나도록 유도했다(실험 3). 이 결과는 두 지각 학습법과 비우세안 특정적인 주의가 양안 간 억제의 불균형을 감소하는 데 중요한 역할을 한다는 것을 시사한다.

다양한 감광제와 아미노산의 조합 반응에서 nitro blue tetrazolium의 환원특성 평가

이은빈,홍정일 한국식품과학회 2022 한국식품과학회지 Vol.54 No.1

Riboflavin (Rb), in the presence of methionine (Met) under light, generates superoxide radicals that can reduce nitro blue tetrazolium (NBT) to its corresponding formazan. The Rb-Met/NBT system has been used to measure the superoxide dismutase (SOD)-like activities of various antioxidants. However, the reaction mechanisms have not been clearly defined, and the assay conditions are not consistent. In this study, the effects of different photosensitizers and amino acids on NBT reduction in different solvents were investigated. NBT reduction in the Rb-Met/NBT system was more pronounced in phosphate-buffered saline, compared to distilled water or Tris (pH 7.5); histidine (His) instead of Met also led to considerable Rb-induced NBT reduction. Among the photosensitizers, methylene blue with His caused potent NBT reduction in Tris. Rb-induced NBT reduction combined with Met or His was quantitatively inhibited by SOD or gallic acid, but did not affect MB-induced reduction sensitively.

간이식 후 Hepatic Artery Thrombosis 예방 목적으로 투여된 Sarpogrelate과 Aspirin의 효과 및 안전성 비교

이은빈,김효진,김재송,손은선,유윤미 한국병원약사회 2020 병원약사회지 Vol.37 No.3

Background : Hepatic artery thrombosis (HAT) is one of the most serious complications that can occur after liver transplantation. It is a major cause of graft loss. The aim of this study was to analyze the efficacy and safety of sarpogrelate and aspirin for preventing HAT after liver transplantation. Methods : Electronic medical records of patients who had undergone their first liver transplantation at a tertiary hospital in Korea between August 1, 2016 and July 31, 2018 and received sarpogrelate or aspirin for HAT prevention were retrospectively reviewed. Iincidence of HAT and vascular complications and incidence of major bleeding events were selected as indicators for efficacy and safety, respectively. Results : A total of 114 patients were included in this study. The incidence rate of HAT in the group receiving sarpogrelate or aspirin was 2.1 or 1.5%, respectively (p=0.820). No significant difference was also found in the incidence rate of portal vein thrombosis (p=0.481) or hepatic vein thrombosis (p=0.508) between the two groups. Although bleeding events with a decrease in hemoglobin level ≥ 3 g/dL in the aspirin group were significantly higher than those in the sarpogrelate group (p=0.032), the incidence of major bleeding events was not statistically different between the two groups (p=0.127). Conclusion : There was no statistically significant difference in HAT prevention or major bleeding events between sarpogrelate and aspirin groups. Future research is needed to establish guidelines for the use of antiplatelet agents to prevent HAT in liver transplant patients.

교사 변인과 유아 창의성의 관계에서 창의적 교수행동의 매개효과

이은빈,유연옥 한국아동교육학회 2017 아동교육 Vol.26 No.4

The purpose of this study was to investigate mediating effect of creative teaching behavior between teacher‘s variables and young children’s creativity. The subjects of this study were 640 five-year-old children and 160 teachers. For data collection, children took the TTCT(figural), while teachers completed questionnaires on teacher efficacy, thinking styles, creative personality, and creative teaching behavior. Data were analyzed using path analysis and the Sobel test. The results of this study were as follows. First, teacher efficacy, thinking styles, creative personality and creative teaching behavior as teacher’s variables directly affected the young children’s creativity. Second, the effects of teacher efficacy, thinking styles and creative personality on the young children’s creativity were mediated by creative teaching behavior. Indirect effects of creative behavior were relatively higher than other independent variables when thinking styles was the independent variable. The results of this study indicate that creative teaching behavior and its 3 subfactors had significant mediating effects between teacher’s variables and young children’s creativity. 본 연구의 목적은 교사 변인과 유아 창의성과의 관계에서 창의적 교수행동의 매개효과를 살펴보고자하는 것이다. 본 연구의 대상은 만 5세 유아 640명과 그들의 담임교사 160명이다. 유아에게는 TTCT(도형)를 실시하였으며, 교사에게는 교사효능감, 사고양식, 창의적 인성, 창의적 교수행동에 대한 검사를 실시하였다. 수집된 자료는 경로분석과 Sobel 검증법을 활용하여 분석하였다. 본 연구의 결과는 다음과 같다. 첫째, 교사변인인 교사효능감, 사고양식, 창의적 인성, 창의적 교수행동은 유아 창의성에 직접적인 효과가 나타났다. 둘째, 창의적 교수행동을 매개로 교사효능감, 사고양식, 창의적 인성이 유아의 창의성에 영향을 주는 것으로 나타났다. 그리고 창의적 교수행동의 간접효과는 사고양식이 독립변인인 경우에 다른 독립변인들에서 보다 상대적으로 높았다. 본 연구결과를 통해 창의적 교수행동이 교사 변인과 유아의 창의성 관계에서 주요한 매개 역할을 함을 시사한다.

Microstructures, Thermal Stability, and Electrical Properties of Poly(1,3,4-oxadiazole) /graphene Nanocomposite films

이은빈,정영규 한국고분자학회 2014 한국고분자학회 학술대회 연구논문 초록집 Vol.2014 No.10

Structures and Properties of Poly(1,3,4-oxadiazole)/MWCNT/Graphene Hybrid Nanocomposite Films

이은빈,정영규 한국고분자학회 2015 한국고분자학회 학술대회 연구논문 초록집 Vol.2015 No.4

Synthesis and Characterization of polyacrylonitrile-based terpolymers containing vinyl acetate and itaconic acid as comonomers

이은빈,박원호,정영규 한국고분자학회 2015 한국고분자학회 학술대회 연구논문 초록집 Vol.2015 No.10

문재인정부의 지방분권과 지방재정격차의 영향관계 분석

이은빈,강인성 한국공공관리학회 2023 한국공공관리학보 Vol.37 No.1

The purpose of this study is to analyze the relationship between decentralization of the Moon Jae-in administration and the impact of the local fiscal gap and to propose policies. Not only the world but also Korea is establishing decentralization in which power is distributed to the provinces, away from the centralized governance system. Few specific studies have been conducted on the Moon Jae-in administration, which actively promoted decentralization. In this context, this study set the time range from 2017 to 2021 for empirical analysis, collected 16 data from metropolitan and provincial governments, and conducted panel analysis using fixed effect models and probability effect models. As a result of the analysis, among the decentralization factors, factors affecting the local fiscal gap were found. Regarding autonomous finance, the local tax ratio had an effect, and in relation to autonomous organizations, the ratio of local government officials and the provision rate of public officials’ labor costs had an important effect on the local fiscal gap. Regarding regional economic factors, it was found that the local tax burden per resident had an effect. Policy implications based on these analysis results are as follows. First of all, since it is important to expand the size of local taxes to successfully realize decentralization, efforts by local governments to supplement the system and secure tax revenue are required to expand local taxes. In addition, as the role of the ratio of local government officials and the provision rate of labor costs is needed to bridge the local fiscal gap, local government human resources and human investment policies should be prepared. Since the local tax burden per resident related to the local economy has a positive effect on decentralization, policy efforts by local governments are required to collect local taxes. 본 연구는 문재인정부의 지방분권과 지방재정격차의 영향관계 분석과 정책적 제안을목적으로 한다. 전세계 뿐만 아니라 우리나라도 중앙에 집중된 통치체제에서 벗어나 지방으로 권력이 분산되는 지방분권이 정착되고 있다. 지방분권을 적극적으로 추진하였던 문재인정부에 대한 구체적인 연구는 거의 이루어지지 않았다. 이런 맥락에서 본 연구는 실증적 분석을 위해 2017년부터 2021년을 시간적 범위로 설정하고, 광역자치단체 16개 자료를 수집하여 고정효과모형과 확률효과모형을 활용한 패널분석을 실시하였다. 분석 결과, 지방분권 요인 중 지방재정격차에 영향을 미치는 요인들을 발견할 수있었다. 자치재정과 관련해서는 지방세 비율이 영향을 미쳤고, 자치조직과 관련해서는지방정부 공무원 비율과 공무원 인건비 충당율이 지방재정격차에 중요한 영향을 미치는 것으로 나타났다. 지역경제 요인과 관련해서는 주민1인당 지방세부담액이 영향을미치는 것으로 나타났다. 이러한 분석 결과를 토대로 정책적 시사점을 제시하면 다음과같다. 먼저 성공적인 지방분권 실현을 위해 지방세 규모 확대가 중요하므로, 지방세 확충을 위한 지방정부의 제도 보완 및 세수 확보 노력이 요구된다. 그리고 지방재정격차해소에 지방정부 공무원 비율 및 인건비 충당율의 역할이 필요함에 따라 지방정부 인적자원 확보 및 인적투자 정책을 마련해야 할 것이다. 마지막으로 지역경제 관련 주민1인당 지방세부담액이 지방분권화에 긍정적인 영향이 있으므로 지방세 징수를 위한 지방정부의 정책적 노력이 요구된다.

Structural and property characterization of acrylonitrile-based terpolymers synthesized via aqueous dispersion polymerization

이은빈,박원호,정영규 한국고분자학회 2016 한국고분자학회 학술대회 연구논문 초록집 Vol.41 No.1

루테늄 기반 전이금속 나노입자/환원된 산화그래핀 혼성체를 이용한 알칼리 수전해 촉매 합성

이은빈,조승근,김상준,박길령,이정우 대한금속·재료학회 2023 대한금속·재료학회지 Vol.61 No.3

Green hydrogen has attracted significant attention as one of the future energy sources because nogreenhouse gases are emitted during production and its energy density is much higher than fossil fuels. Precious metals such as platinum (Pt) and iridium (Ir)-based catalysts are commonly used for water splittingcatalysts. However, because of high cost of these precious metals, the mass production of green hydrogen isrestricted. In this study, water splitting catalysts based on relatively inexpensive ruthenium (Ru), cobalt (Co),and iron (Fe) were synthesized. The metal nanoparticles were anchored on reduced graphene oxide (rGO) bya microwave-assisted process. The nanoparticles were uniformly distributed on the rGO supports with sizesof about 1.5 and 2 nm in Ru/rGO and RuCoFe/rGO, respectively. This promoted the reaction by furtherincreasing the specific surface area of the catalysts. In addition, it was confirmed by EDS mapping resultsthat the nanoparticles were made of RuCoFe alloy. Among the prepared catalysts, Ru/rGO was excellenttoward the hydrogen evolution reaction (HER), which required an overpotential of 50 mV to reach a currentdensity of −10 mA cm−2. In addition, RuCoFe/rGO, which contained the RuCoFe alloy, was the best for theoxygen evolution reaction (OER), and it required 362 mV at the current density of 10 mA cm−2.