국내 육성 황육계 키위푸르트 품종간 저장 특성 비교

이아연,배태민,조윤섭,황용수,Lee, Ah-Youn,Bae, Tae-Min,Cho, Youn-Sup,Hwang, Yong-Soo 충남대학교 농업과학연구소 2014 Korean Journal of Agricultural Science Vol.41 No.4

Physiological characteristics of two Korean golden kiwifruit cultivars, 'Halla Gold' and 'Haehyang', were compared to determine the storage potential of fruit. The soluble solid levels of the fruit were 8.9 and 6.9 oBrix in 'Halla Gold' and 'Haehyang' at harvest, respectively but increased up to 15.4 in 'Halla Gold' and 17.5 oBrix in 'Haehyang' after 2 months of storage. Major sugars were fructose and glucose, and sucrose content was relatively low regardless of cultivar. The edible quality of 'Haehyang' was better than 'Halla Gold' because of higher amount of sugars. Firmness of the fruits gradually decreased as the increase of storage period in 'Halla Gold' in both flesh and core tissue. Th firmness loss of 'Haehyang' fruit was faster in the first 2 months and then became slow. After 75 days of storage, the firmness of 'Haehyang' fruit was only 5.2% at harvest. Core tissue was soften enough to eat at ripe stage. Wall modifying enzyme activities including xylanase, ${\alpha}$-L-arabinofuranosi-dase and ${\beta}$-galactosidase were consistently higher in 'Haehyang' and the activity of pectate lyase was more increased than 'Halla Gold' after 2 months of storage. Respiration rate of 'Haehyang' was higher than 'Halla Gold' and further increased after 2 months of storage. Weight loss was much higher in 'Haehyang' which showed higher rate of the firmness loss. The storage potential of golden kiwifruit was estimated to be about 2 months for 'Haehyang' and 3 months for 'Halla Gold' when determined on the basis of the fruit firmness.

Compressible aerogel electrodes for energy devices prepared by self-assembly of cellulose and aramid nanofibers

이아연,박승희,안성훈 한국공업화학회 2021 한국공업화학회 연구논문 초록집 Vol.2021 No.1

국제개발협력사업의 마을도로 건설 비용편익 분석 - KOICA 베트남 라오까이 행복프로그램 적용사례 -

이아연,공기서,윤성수,송양훈,Lee, Ah-Youn,Kong, Ki-Seo,Yoon, Seong-Soo,Song, Yang-Hoon 한국농촌계획학회 2018 농촌계획 Vol.24 No.3

The purpose of this study is to measure the cost-benefit of a road construction project in Vietnam through international development cooperation, which includes private grants and Official Development Assistance(ODA). In developing countries, it is difficult and costly to use data on markets, the CVM(Contingent Valuation Method) to measure the WTP(Willingness-to-Pay) as the benefits of road construction are used. A total of 232 villagers in 16 villages of Lao Cai Province in Northern Vietnam have been surveyed. It is found that the Benefit-Cost Ratio(B/C) in all 3 models are found to be well over 1.0, ranging from 2.8 to 3.64 with the discount rate of 0.06. These BC ratios imply the road construction project in Lao Cai can be justified. Also, it is found that the shortened travel time is the most relevant factor for WTP among direct benefits and the enhanced academic achievement of the children is the most relevant factor among indirect benefits, due to easier and faster access to schools, which in turn increase the school attendance rate. The result of this study can be used to justify other similar projects in Vietnam, even though the benefits may have to be reassessed in other countries.

DEMATEL 기법을 활용한 프로젝트 관리 성공을 저해하는 장애요인 간의 영향 관계 분석

이아연,장미경 한국산업경영시스템학회 2021 한국산업경영시스템학회지 Vol.44 No.3

There is an increasing need for complex and large projects to be carried out quickly. As the duration, size, and cost of the project increase, concerns about project failure are also rising. Finding factors that hinder the performance of an effective project and eliminating them in advance or controlling and managing them more effectively can be a more direct way to secure the success of the project. Previous studies have identified compositional dimensions that are classified according to attributes, covering the various obstacles that affect the success of the project through existing literature. It is a follow-up to previous research. Using DEMATEL techniques, we would like to propose to explore the appropriate measures that an entity and organization can take by identifying the causality between factors through cross-impact analysis of project disabilities and even presenting factors that may arise when they are identified. As a result of the analysis, according to the indicators to evaluate the importance, 8 factors were found to be relatively important factors, excluding the factors that Failure of project feasibility analysis and Technical environment change. In addition, 5 factors were found to be causative factors; Technical environment change, Unclarity project plan, Strategic consistency error, Inaccuracy of requirement definition, and Failure of project feasibility analysis. In contrast, the remaining 5 factors were found to be the result factors; Lack of benefits realization, Negative attitude of top management, Stakeholder conflict, Difficulty of process management, and Disturbance of communication.

프로젝트 관리의 성공에 영향을 미치는 장애요인

이아연,문경미,김승철 한국산업경영시스템학회 2020 한국산업경영시스템학회지 Vol.43 No.3

As the business environment is rapidly changing with globalization and complexity of information flows, the uncertainty is also very increased for project environment. Although many studies have been conducted to find out the critical factors for project success, there still exist different views to define project success. Furthermore, implementing success formula for one project does not necessarily guarantee a success for another project since there are other elements that impede the success of project. In this regards, it is imperative to examine what are the barriers to project success. This study aims to examine the barriers that impede the success of project. Past literature was thoroughly reviewed to collect and develop a preliminary list of elements that affected project performance negatively. Experts were interviewed to refine the list and the final list of the measurement items were developed. A survey questionnaire was developed with the final list of measurement items, and a survey was conducted on the practitioners with project experience. After the survey, an exploratory factor analysis was conducted on the final list to extract the component dimensions which in turn formed the group of project barriers. The exploratory factor analysis provided ten factors, which are difficulty of process management, failure of project feasibility analysis, cost overruns and lack of cost benefits, unclarity project plan, strategic consistency error, stakeholder conflict, inaccuracy of requirement definition, disturbance of communication, technical environment change, negative attitude of top management.

‘주택-보행자길-어린이공원 연계 공간’의 조성을 위한 평가도구 개발 방안: 전주시 다세대ㆍ다가구주택 밀집지역을 대상으로

이아연,김용국,황지욱 (사) 한국도시재생학회 2024 도시재생 Vol.10 No.3

With digital transformation and social changes, the demand for residential infrastructure and living convenience is increasing. In particular, children's parks have high accessibility and are one of the essential infrastructures with high usage rates among neighborhood parks. Children's parks in areas densely populated with multi-family and multi-tenant housing play an important role as spaces for play and relaxation. However, issues such as a lack of pedestrian spaces, illegal parking, and insufficient green areas are degrading the quality of the residential environment. Simply evaluating children's parks is not sufficient to achieve improvements in the residential environment. Therefore, this study developed an assessment tool for the 'residential area-pedestrian path-children's park linkage space.' The development process involved four steps: first, constructing primary evaluation items through a literature review; second, modifying and supplementing the items through expert brainstorming; third, verifying the tool's appropriateness and reliability through a pilot evaluation; and fourth, preparing an assessment sheet and guidelines for application to eight children's parks in Jeonju. The assessment results showed generally low scores, with the 'convenience' item recording the lowest score. This indicates that remodeling and renovation of most children's parks and their surrounding residential and pedestrian environments are urgently needed. The assessment tool developed in this study introduces a new concept that extends the scope of children's parks to the residential environment and can be utilized as foundational data for further evaluation.

아동학대와 자아존중감의 관계: 집행기능 곤란의 매개효과

이아연,김리진 대한아동복지학회 2024 아동복지연구 Vol.22 No.1

The purpose of this study is to investigate the relationship between child abuse and self-esteem mediated by executive function difficulty. The data were collected from 1,357 children in the 6th grade of elementary school in “The Panel Study on Korean Children 2020 (13th year)” by the Korea Institute of Child Care and Education(KICCE). The collected data were analyzed using SPSS 23.0 and PROCESS Macro 4.0. The major findings of this study are as follows. First, according to children’s gender, there were significant differences in the child abuse and sub-factors of executive function difficulty and self-esteem. Second, child abuse showed a positive correlation with executive function difficulty, but it had negative correlations with self-esteem. Also, executive function difficulty showed a negative correlation with self-esteem. Third, executive function difficulty showed a partial mediating effect in the relationship between child abuse and self-esteem. This means that chid abuse may directly affect self-esteem, but it may also negatively affect self-esteem by causing executive function difficulty. This study suggests that psychological intervention is very necessary to recover from the damage to children’s self-esteem caused by unilateral child abuse experiences. 본 연구의 목적은 아동학대와 자아존중감의 관계에서 집행기능 곤란의 매개효과를 검증하는 것이다. 이를 위해 육아정책연구소의 한국아동패널 2020년(13차년도) 초등학교 6학년 아동 1,357명을 대상으로 자료를 수집하였다. 수집된 자료는 SPSS 23.0과 PROCESS Macro 4.0을 사용하여 분석하였다. 본 연구의 주요 연구결과는 다음과 같다. 첫째, 아동의 성별에 따른 차이를 살펴본 결과, 아동학대와 집행기능 곤란의 하위요인인 ‘행동통제 곤란’ 그리고 자아존중감은 남아가 여아보다 더 높은 것으로 나타났다. 둘째, 아동학대, 집행기능 곤란 및 자아존중감의 관계를 살펴본 결과, 아동학대는 집행기능 곤란과 정적 상관이 있는 반면, 자아존중감과는 부적 상관이 있는 것으로 나타났다. 한편 집행기능 곤란과 자아존중감은 부적 상관이 있는 것으로 나타났다. 셋째, 아동학대와 자아존중감의 관계에서 집행기능 곤란의 매개효과를 검증한 결과, 집행기능 곤란은 통계적으로 유의한 부분매개효과를 가지는 것으로 나타났다. 이는 아동학대가 자아존중감에 직접 영향을 미치기도 하지만, 집행기능 곤란을 유발하여 자아존중감에 부정적 영향을 미칠 수도 있음을 의미한다. 본 연구는 아동이 통제하거나 조절할 수 없는 일방적인 학대 경험으로 인한 자아존중감의 손상을 회복하기 위한 심리적 개입이 매우 필요함을 시사한다.

Determination of Standard Target Water Quality in the Nakdong River Basin for the Total Maximum Daily Load Management System in Korea

이아연,조선주,박무종,김상단 대한토목학회 2013 KSCE JOURNAL OF CIVIL ENGINEERING Vol.17 No.2

This study suggests methods to improve the total maximum daily loads management system currently being regulated in Korea. The TANK model which is a conceptual rainfall-runoff model including the river routing function and the evapotranspiration process is adapted to simulate daily stream flows, and the 7-parameter log-linear model combined with the minimum variance unbiased estimator is used to calculate daily stream contaminant loads. Based on these methods, Load Duration Curves (LDCs) for each unit watershed are constructed. Using LDCs of all unit watersheds, representative specific LDC of Nakdong River is derived to indicate the average contaminant status of the whole river basin in terms of water quality items. Using representative specific LDCs,appropriate target water qualities with respect to reference flow conditions are assigned to all of unit watersheds, and point sources or non-point sources priority management areas of 40 unit watersheds of the Nakdong River basin are identified.

중학교 통합교육 환경에서 특수교육대상학생이 경험한 학교생활과 의미

이아연,서효정 한국특수교육학회 2024 특수교육학연구 Vol.58 No.4

The purpose of this study is to explore the school life of middle school students with special needs, focusing on general classes, special classes, and peer relationships, using the photovoice research method. Based on this, the study aims to examine the educational needs and supports needed by students with special educational need in middle school. To achieve this, five students from a special education class in the second year of middle school were selected as the research subjects. They participated in the photovoice study for four months from March to June 2023. Participants took part in orientation once, nine interviews on the topics of general education, special education, and peer relationships, photovoice exhibition once. Eleven individual and group interviews were conducted over a period of about four months, and the collected qualitative data were analyzed according to Wang & Burris’s the three steps of photovoice analysis. The analyzed data were categorized into four major categories, 11 sub categories, and 40 semantic units: “Half-hearted school life”, “My lonely day at school”, “Moments when I'm happy to have a friend”, and “the future I dream of”. The names of each category are based on the words, sentences, or parts of sentences expressed by the research participants themselves. The research process yielded the following findings: First, students with special educational need in middle school were experiencing both difficulties and pleasures in their academic performance during school. Second, students with special educational need in middle school had difficulty forming peer relationships and social interactions in the general classroom. Third, students with special educational need in middle school were experiencing intimacy through positive social interactions at school. Fourth, students with special educational need in middle school had expectations for those around them in school and dreams of what they wanted to be in adulthood.

군집분석을 활용한 국제개발협력사업 영향평가 비교군 선정 방법에 관한 연구

이아연,공기서,송양훈 충북대학교 국제개발연구소 2022 사회적경제와 정책연구 Vol.12 No.4

Impact Analysis is to measure the effectiveness of international development projects, comparing income of target group and non-target group, for example. Thus, selection of similar non-target group is important. Propensity Score Matching (PSM) is the most common method but with constraints and weaknesses. This study proposes Cluster Analysis (CA) as an alternative matching method with application to a on-going project. The result suggests that PSM is not suitable while CA improves comparability, decreasing the selection bias, which, in turn, leads to improved impact analysis. 국제개발협력사업에서는 영향분석을 통하여 사업의 효과성을 측정하고 있다. 따라서, 사업군 성과지표(예, 소득증가)의 비사업군 해당지표와 공정한 비교를 위해서는, 사업 전의 사업군과 유사한 조건의 비사업군을 선택하는 것이 중요하다. 하지만, 동 분야에서의 일반적 비교군 선택 방법인 성향점수매칭은, 방법론상 여러 제약 및 약점에 노출되어 있다. 본 연구의 목적은, 성향점수매칭이 적절하지 않은 경우에 대안을 제시하는 것이다. 연구방법으로, 군집분석매칭을 활용하여 실제 시행되고 있는 사업에 적용하여 성향점수매칭과 비교하였다. 분석 결과, 분석 대상 사업의 경우, 성향점수매칭은 부적절했으며, 군집분석을 통한 매칭이 더 적절한 것으로 판단하였다. 본 연구 시사점은, 향후 국제개발협력사업의 영향분석을 위한 비교군의 선택에 있어 비교군 선택편향(Selection Bias) 저감 방안을 제시하여, 더 정확한 사업 영향분석에 기여하는 것이다.