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      • KCI등재

        상업가로경관의 시각적 정보량이 선호도에 미치는 영향 분석 - 컴퓨터 비전 기법을 활용하여

        이지윤,박진아 한국도시설계학회 2020 도시설계 : 한국도시설계학회지 Vol.21 No.4

        The aim of this study is to find out the visual complexity perception of the streetscape and preferences from street users and to compare the relationship between computer-measured visual complexity to see if a computer can represent a person’s perception. Previous studies about visual complexity have the problem of being arbitrary in defining ‘visual complexity’, so this study attempted to overcome the limitations of previous studies using computer-based mechanical measurement. The results of this study are as follows: First, the relationship between two measurement methods was found to be consistent. As a result, we saw the possibility that computers could represent human perception. Second, as the complexity of the streetscape has increased, people’s preferences have risen and then peaked at medium complexity and then lowered again. Therefore, in order to derive the highest preference of street users, it is important to plan the elevation of the building by selecting the appropriate complexity. 본 연구의 목적은 가로 이용자의 입장에서 경관에 대한 시각적 복잡성 인식과 그에 따른 선호도에 대해 알아보고, 컴퓨터로 측정한 시각적 정보량과의 비교를 통해 컴퓨터가 사람의 인식을 대변할 수 있는지를 알아봄에 있다. 기존의 시각적 복잡성과 관련한 연구들은 ‘시각적 복잡성’을 정의함에 있어 자의적이라는 문제를 가지고 있어 본 연구는 컴퓨터를 이용한 기계측정방식을 사용함으로써 선행연구들의 한계를 극복하고자 하였다. 분석 결과 첫째, 설문을 통한 선호도-복잡성의 관계와 기계측정을 통한 선호도-정보량의 관계가 일치하는 것으로 나타났으며, 이를 통해 컴퓨터 비전 방법론이 사람의 인식을 대변할 수 있다는 가능성을 보았다. 둘째, 가로경관의 정보량이 올라감에 따라 사람들의 선호도가 높아졌다가 중간 정보량에서 정점을 찍고다시 낮아지는 현상을 보였다. 따라서 가로 이용자의 가장 높은 선호도를 이끌어내기 위해서는경관계획을 함에 있어 적절한 시각적 정보량을 선정해 건물 입면계획을 하는 것이 중요하다.

      • Computational Thinking based Mathematical Program for Free Semester System

        이지윤,조한혁 한국수학교육학회 2014 수학교육연구 Vol.18 No.4

        In recent years, coding education has been globally emphasized and the Free Semester System will be executed to the public schools in Korea from 2016. With the introduction of the Free Semester System and the rising demand of Computational Thinking (CT) capacity, this research aims to design ‘learning environment’ in which learners can design and construct mathematical objects through computers and print them out through 3D printers. Furthermore, it will design learning mathematics by constructing the figurate number patterns from ‘soma cubes’ in the playing context and connecting those to algebraic and combinatorial patterns, which will allow students to experience mathematical connectivity. It is expected that the activities of designing figurate number patterns suggested in this research will not only strengthen CT capacity in relation to mathematical thinking but also serve as a meaningful program for the Free Semester System in terms of career experience as 3D printers can be widely used.

      • Representation Systems of Building Blocks in Logo-based Microworld

        이지윤,조한혁,송민호,김화경 한국수학교육학회 2011 수학교육연구 Vol.15 No.1

        Logo has influenced many researchers and learners for the past decades as a 2D turtle geometry environment in the perspective of constructionism. Logo uses the metaphor of ‘playing turtle’ that is intrinsic, local and procedural. We, then, design an environment in which the metaphor of ‘playing turtle’ is applied to construct 3D objects, and we figure out ways to represent 3D objects in terms action symbols and 3D building blocks. For this purpose, design three kinds of representation systems, and asked students make various 3D artifacts using various representation systems. We briefly introduce the results of our investigation into students’ cognitive burden when they use those representation systems, and discuss the future application measures and the design principles of Logo-based 3D microworld.

      • KCI등재

        간호사의 노인 환자 간호에 대한 스트레스가 노인 간호행위 실천에 미치는 영향

        이지윤,남혜리,손은진,황주희,남은숙 한국노인간호학회 2016 노인간호학회지 Vol.18 No.2

        '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.

        Purpose: This study was done to identify how stress concerning the care for elderly people affects geriatric nursing practice of nurses in general hospitals. Methods: Participants were 205 nurses who were working in general hospitals in C city. Data were collected through structured questionnaires from November 9 to November 20, 2015. Data analysis included one-way ANOVA, independent t-test, Pearson correlation coefficient and multiple regression using the SPSS/WIN 21.0 program. Results: Stress in caring for elderly patients affected geriatric nursing practice. Stress in the care of elders explained 12.4% (F=9.52, p<.001) of the variance in geriatric nursing practice. Conclusion: These results suggest that programs to decrease stress in the care of elders should be develop to improve the quality of geriatric nursing practice by nurses in general hospitals.

      • KCI등재

        중만생 저아밀로스 가공용 벼 ‘미호 (밀양300호)’

        이지윤,이나금,송유천,이종희,조수민,권영호,이소명,강주원,박동수,조준현 한국육종학회 2021 한국육종학회지 Vol.53 No.3

        ‘Miho’ (Milyang300) was developed as a processing rice by means of pedigree selection. ‘Milyang300’ has slightly opaque seedswith low amylose content (11.2%), unlike cultivars such as Baegjinju and Milky-queen, which have seeds with low amylose but are opaque. ‘Milyang300’ was selected and named ‘Miho’ in 2016. ‘Miho’ is a late-maturing ecotype with an average heading date of August 21st. Itshows mild resistance to leaf blast and strong resistance to rice stripe virus, and bacterial blight (K1-K3); however, it is susceptible to brownplant hopper infestation. The yield capacity of ‘Miho’ determined over 3 years of regional yield trials was 565 kg/10 a. In terms of processingproperties, ‘Miho’ shows no significant differences in textural properties when stored for 6-48 h at 3℃ and -18℃. Moreover, the physicalproperties of ‘Miho’ remain unaltered during freeze-thaw processes. Thus, the low-amylose rice ‘Miho’ may be suitable for the productionof refrigerated and frozen cooked rice (Registration No. 7656).

      • 교사의 지도성향과 아동의 문제행동에 관한연구 : 교사와 문제아동의 지각을 중심으로

        이지윤,안명희 동덕여자대학교 생활과학연구소 2007 생활과학연구 Vol.12 No.-

        This study examined teacher and child perceptions about teacher attitude and child behavior problems with children who were identified as being at risk for behavior problems by their homeroom teachers. By comparing the teacher and child perceptions regarding each other's attitudes and behaviors and examining the nature and extent of their relationship, the present study proposed to investigate the nature of teacher and child perceptions. It also aimed to exam ine whether perceptual gap in the teacher-child relationship may be a potential risk factor for child behavior problems. A total of 239 subjects(N=239) including 172 children (n=I72) in the 3rd, 4th, 5th, and 6th grade and their homeroom teachers (n=67) participated in the study. Findings indicated that teacher and child perceptions about teacher attitude and child behavior problems showed statistically significant differences, Age specific findings suggested that the interpersonal perceptions are moderated by individual characteristics. Teacher and child reports of the child behavior problems (externalized & internalized behavior problems and overall emotional symptoms) also showed statistically significant differences while the relationship between child reports of teacher attitude and the child behavior problems did not. The greater the difference in the child and teacher perception regarding teacher attitude, the more increased were the child emotional symptoms. Gender and age specific findings added to the complexity of the nature of perceived child behavior problems and its relationship with perceived teacher attitude.

      • KCI등재

        식별제(Unimark 1494DB) 정량시험에서 파란색 색소(Orimax Blue 2N, Orimax Green 151), Quinizarin, 토파졸(P-250) 및 윤활유 원료(P-8)의 흡광도상승 효과

        이지윤,김창종,Lee, Ji-Yun,Kim, Chang-Jong 대한약학회 2006 약학회지 Vol.50 No.5

        There are three kinds of liquid petroleum marker which is extracted by the basic or acidic, and both developer. Korean marker, Unimark 1494 DB (marker) have been spectrophotometrically analysed by the determination of absorbance at 582 nm after base extraction by Unimark 1494 DB Developer C-5 (developer). Some blue dyes which have same reactive radical of marker and can be changed deep blue color in base developer extraction (BDE), may be increased absorbance at 582 nm, but dyes or markers which can be increased the absorbance, were not unclear. In this experiment, effects of three dyes or marker such as Orimax Green 151 (the mixture of CI Solvent Yellow 16 and CI Solvent Blue 70), quinizarin and Orimax Blue 2N (CI Solvent Blue 35), and two solvent such as topasol (P-250) and lubricant (P-8) on the absorbance were studied by HITACHI Recording Spectrophotometer U-3300. It shows that all of them increased absorbance at 582 nm after BDE. Absorbance at 582 nm can be showed 0.0544 by Orimax Green 151 at the concentration of 3.96 mg/l, quinizarin at the concentration of 1.38 mg/l, and Orimax Blue 2N at the concentration of 2.73 mg/l in the artificial petroleum (normal diesel oil: topasol: lubricant=2 : 4: 4), respectively. Absorbance, 0.0544 indicates that concentration of marker is 1.64 mg/l in the reference curves, respectively. And also these results can be showed that the artificial petroleum have about 10% cheep fuel such as kerosene which have marker (16.0 mg/l). Absorbance of P-250 was 0.01361-0.22842 depending upon the purchasing date, and that of P-8 was 0.05644. pH of developer was 14.83, and so this result indicates that Unimark 1494 DB is a base extractable petroleum marker, phenylazophenol (US Patent No. 5,252,106). In the BDE, the slight color of Orimax Blue 2N, Orimax Green 151 and quinizarin in artificial petroleum changed to deep bright blue color, respectively. These result indicate that the absorbance at 582 nm by BDE may be increased not only by azo, diazo, amine and ketone (anthraquinone, coumarin) dyes or markers, but also the contaminants of P-250 and P-8 which have same as reactive radical of dyes or markers.

      • 화장품기업 기업의 사회적 책임(CSR) 활동 조사 : 일본 시세이도그룹과 한국 아모레퍼시픽그룹 비교

        이지윤,김진영 글로벌문화콘텐츠학회 2014 글로벌문화콘텐츠학회 학술대회 Vol.2014 No.-

        '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.

        이 연구는 일본 대표적 화장품회사인 시세이도와 한국의 아모레퍼시픽 그룹의 사회적 공익활동을 비교하여 기업의 사례를 종합적으로 분석하는 데에 목적이 있다. 오늘날 기업들은 기업 이미지 제고뿐 아니라 사회적 환원과 가치창출에도 가여함으로써 적극적인 사회공헌활동이 증가하고 있다. 이는 단순한 기부활동에서 벗어나 보다 창조적이고 효율적인 프로그램을 만드는 것으로 사회적 공익활동이 부각되는 가운데 효율을 극대화하기 위한 방안을 모색해보고자 한다. 특히 시세이도와 아모레퍼시픽 그룹은 일본과 한국의 화장품 1위 업체로서 특히 문화 예술 측면에서 활발한 사회공헌활동을 수행하고 있다. 아직 한국기업들의 사회적 책임활동은 제한된 분야 내에서 수행되고 있고 문화, 예술측면에서의 활동은 미흡한 편임을 감안해 볼 때 이 연구는 문화, 예술분야에서 기업의 활발한 사회적 책임활동을 제고하는 시금석이 될 수 있을 것으로 판단된다. 따라서 이 연구에서는 시세이도와 아모레퍼시픽의 사례를 중심으로 문화·예술 분야에서의 기업의 사회적 책임활동을 비교분석하고 향후 한국기업들의 사회적 공헌 활동에 대한 방향성을 제시하고자 한다.

      • KCI등재

        12wt% Co 담지 FT 촉매 제조시 유기용매가 촉매활성에 미치는 영향연구

        이지윤,한자령,정종태,백영순,LEE, JIYUN,HAN, JA-RYOUNG,CHUNG, JONGTAE,BAEK, YOUNGSOON 한국수소및신에너지학회 2015 한국수소 및 신에너지학회논문집 Vol.26 No.4

        The synthesis of Fischer-Tropsch (FT) oil is the catalytic hydrogenation of CO to give a range of products, which can be used for the production of high-quality diesel fuel, gasoline and linear chemicals. This studied catalyst was prepared Cobalt-supported alumina and silica by the incipient wet impregnation of the nitrates of cobalt, promoter and organic solvent with supports. Cobalt catalysts were calcined at $350^{\circ}C$ before being loaded into the FT reactors. After the reduction of catalyst has been carried out under $450^{\circ}C$ for 24h, FT reaction of the catalyst has been carried out at GHSV of 4,000/hr under $200^{\circ}C$ and 20atm. From these experimental results, we have obtained the results as following; In case of $SiO_2$ catalysts, the activity of 12wt% $Cobalt-SiO_2$ synthesized by organic solvent was about 2 or 3 times higher than the activity of 12wt% $Cobalt-SiO_2$ catalyst synthesized without organic solvent. In particular, the activity of the $Cobalt-SiO_2$ catalyst prepared in the presence of an organic solvent P was two to three times higher than that of the $Cobalt-SiO_2$ catalyst prepared without the organic solvent. Effect of Cr and Cu metal as a promoter was found little. 200 h long-term activity test was performed with a $Co/SiO_2$ catalyst prepared in the presence of an organic solvent of Glyoxal solution.

      • 확률적 어텐션 매커니즘을 활용한 장비 상태 분류 및 해석 방법론

        이지윤,김성범 한국품질경영학회 2021 한국품질경영학회 학술대회 Vol.2021 No.-

        다채널 센서 데이터 분석은 차량 불량 상태 분류 및 제조 장비 상태 모니터링과 같은 다양한 산업응용 분야에서 활용되고 있다. 지난 수년 간 딥러닝 모델이 발전함에 따라 복잡한 다채널 센서 데이터의 특징을 딥러닝 기반 방법론을 통해 추출하려는 연구가 활발히 진행되고 있다. 장비 상태 분류 문제 상황에서 일반적인 딥러닝 모델을 적용할 경우 모든 예측 가능한 범주가 훈련 단계에서 학습되어야 한다는 가정을 따르므로 새로운 범주에 대해서는 대응을 할 수 없다는 한계점이 있다. 하지만 실제 제조 장비를 모니터링하는 과정에서는 새로운 범주가 발생할 수 있으며, 이에 대한 적절한 조치를 위해서는 기존에 정의된 범주로의 분류가 아닌 미학습 범주로 탐지가 되어야 한다. 본 연구에서는 분류 수행과정에서 유의미한 센서를 식별하고, 이에 대한 불확실성을 정량화할 수 있는 불확실성 인식 어텐션 매커니즘을 제안한다. 또한, 제안 모델로부터 도출되는 불확실성 정보는 미학습 범주를 탐지하는 지표로 활용한다. 제안 모델의 우수성을 입증하기 위해 시뮬레이션 데이터 기반의 검증 프로토콜을 구축하여 우수한 분류성능을 유지하면서 다채널 센서에 대한 다양한 해석이 가능함과 더불어 미학습 범주 탐지가 가능함을 확인하였다.

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