• The Plant Pathology Journal
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• 제32권5호
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• pp.423-430
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• 2016

Clubroot disease caused by Plasmodiophora brassicae is one of the most serious diseases in Brassica crops worldwide. In this study, the pathotypes of 12 Korean P. brassicae field isolates were determined using various Chinese cabbage including 22 commercial cultivars from Korea, China, and Japan, and 15 inbred lines. All P. brassicae isolates exhibited the typical clubroot disease on non-clubroot resistant cultivar, indicating that the isolates were highly pathogenic. According to the reactions on the Williams' hosts, the 12 field isolates were initially classified into five races. However, when these isolates were inoculated onto clubroot-resistant (CR) cultivars of Chinese cabbage, several isolates led to different disease responses even though the isolates have been assigned to the same race by the Williams' host responses. Based on the pathogenicity results, the 12 field isolates were reclassified into four different groups: pathotype 1 (GN1, GN2, GS, JS, and HS), 2 (DJ and KS), 3 (HN1, PC, and YC), and 4 (HN2 and SS). In addition, the CR cultivars from Korea, China, and Japan exhibited distinguishable disease responses to the P. brassicae isolates, suggesting that the 22 cultivars used in this study, including the non-CR cultivars, are classified into four different host groups based on their disease resistance. Combining these findings, the four differential hosts of Chinese cabbage and four pathotype groups of P. brassicae might provide an efficient screening system for resistant cultivars and a new foundation of breeding strategies for CR Chinese cabbage.

• 미래기술융합논문지
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• 제2권4호
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• pp.49-56
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• 2023

본 연구는 친환경적 칫솔과 일반 칫솔의 치면세균막 제거율을 비교 분석하고, 설문지를 통하여 연구 대상자들의 칫솔에 대한 만족도를 조사하여 친환경 구강용품의 효과와 인식에 대하여 알아보고자 하였으며, 이를 통하여 친환경 구강용품에 대한 소비자의 관심을 환기하고 구강용품 선택에 있어 다양한 선택의 기준을 제시하는데 목적이 있다. 연구결과 친환경 칫솔과 일반칫솔의 칫솔 종류별 치면세균막 제거율에 유의미한 차이가 나타나지 않은 것으로 보아, 친환경 칫솔의 기능은 일반 칫솔의 기능과 별다른 차이가 없는 것을 알 수 있었으며, 친환경 칫솔에 대한 만족도가 전반적으로 긍정적이었기 때문에 앞으로 미래사회의 더 나은 환경을 위해 소비자들이 친환경 칫솔을 선택하도록 하기 위해서는 친환경 구강위생용품에 대한 관심 증대를 목표로 한 지속적인 홍보와 개발이 선행되어야 할 것으로 보인다.

• 한국실내디자인학회논문집
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• 제23권3호
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• pp.153-163
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• 2014

The eco-friendly elements are important for new construction and renovation and redevelopment of the buildings. The green buildings are related with minimizing environmental pollution and how to live with nature throughout the entire process of demolishing and building. The purpose of this paper is to study on eco-friendly business buildings in the trend of mandatory green building certification system. The analysis of this paper is comparative studies on practices at eleven domestic eco-friendly business buildings through site survey on design framework of green buildings. The design framework of eleven this buildings is six kinds of skills on technical, renewable, ecological, cultural, healthy, social. The eleven this buildings in the new & renewable energy and IT technology of technical sector are satisfied with the framework. But, domestic most advanced eco-friendly business buildings are placed difference between almost the two times on the lower buildings at comparative evaluation. The three of this buildings are gratified rainwater harvesting and waste recycling systems for renewable and recycle. The buildings have an excellent aspects of technology and ecology. The benefits of this buildings are related with future compulsory zero energy house to take technical advantage of renewable energy. However, the buildings reflecting the regional culture types is insufficient. The buildings should be supplemented as follows. This buildings are need to have the social enhancement programs and design for convenient space of community residents, through health and comfort of on workplace. Moreover, this buildings have features of coexisting with human beings and nature friendly with the aim of realizing the sustainable development. The social enhancement programs through regional cultural aspects with ecology are related with individual and community livings in harmony, non-hierarchical communal lifes. The development of the cultural aspects provide for consensus about the local community and creating sustainable communities. Thus, The buildings are to have energy saving, pleasant and healthy living environment and interactive individual and community livings in harmony.

• 환경영향평가
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• 제15권4호
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• pp.279-288
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• 2006

Saemangeum reclamation project was started in 1991 with the purpose of eco-friendly reclamation, but without clear definition of eco-friendliness. This study was carried out to find out the environmental indicators to define and evaluate the eco-friendliness of Saemangeum project. The methodology to identify the indicators included the analysis of similar reclamation projects, professional discussions, and Delphi survey. The eco-friendly indicators are theoretically based on the five elements of eco-friendliness; 1) resource consumption, 2) energy consumption, 3) pollution emission, 4) bio-diversity, 5) social amenity. The 69 indicators were explained in detail for the convenient use of the indicators by the potential users. The 69 indicators were classified into three categories such as pre-evaluation, process evaluation, and post-evaluation. In terms of spatial consideration, the 69 indicators were classified into two categories such as direct influence area and indirect influence area. Also the 69 indicators were classified into 7 categories: 1) sea, 2) lake, 3) agricultural land use, 4) industrial land use, 5) residential land use, 6) tourism land use, and 7) environmental land use. Twenty core indicators were selected from the 69 indicators by surveying the importance of each indicator. The core indicators are recommended in case of time and budget strain. When there are few quantitative data accumulated for the reclamation project, 5 macro indicators are recommended to be used. Macro indicators are qualitative in nature, and may be used in order to evaluate the overall eco-friendliness of a reclamation project.

• Journal of Electrical Engineering and Technology
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• 제10권6호
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• pp.2348-2355
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• 2015

Transformer mineral oil which is normally hydrocarbon based is non- biodegradable and pollutes the environment in all aspects. Though vegetable oils are eco-friendly in nature and potentially could be used in transformers as a replacement for the mineral oil, there usage is restricted because of their oxidative instability. The present work focuses on using rapeseed oil and pongamia (pongamia pinnata) oil as effective alternatives for the traditional mineral oil in power transformer. The oxidative stability of the rapeseed oil and pongamia oil is increased by using combinations of the natural and synthetic anti-oxidants as additives. The parameters like breakdown voltage, viscosity, flash point, fire point are measured for the rapeseed oil and pongamia oil with and without the additives as per IEC and ASTM standards. The results shown encouraging changes in the parameter values and ensures the use of the oils as a potential alternative insulation in power transformers.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2015년도 전력전자학술대회 논문집
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• pp.407-408
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• 2015

The existing (q)Z-source PWM AC-AC converters have limited voltage gain because of the equivalent series resistance in the Z-source inductor. In order to obtain higher voltage gain than (q)Z-source AC-AC converters, a coupled inductor (or transformer) based Z-source AC-AC converter is proposed in this paper. By increasing turns ratio of the coupled inductor more than 1, the proposed converter can obtain higher output voltage than (q)Z-source converters with the same duty ratio. A 120 W prototype AC-AC converter is built and tested to verify performances of the proposed converter.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2015년도 추계학술대회 논문집
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• pp.101-102
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• 2015

이차전지의 수명 평가는 크게 Cycle life test 와 Calendar life test로 나뉘어져서 평가 되고 있다. Cycle life test로 수명 검증을 위해서는 일반적으로 3000 사이클 이상 테스트를 진행 하여야 하지만 이 방법은 시간이 장기화 되어 신뢰성 검증 및 새로운 부품 적용에 한계가 따른다. 따라서 본 논문에서는 고온 챔버 및 사이클 시험기를 사용하여 빠른 시간 내에 평가를 할 수 있는 가속시험법을 적용하여 수명을 평가 한 연구결과를 발표하고자 한다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2013년도 춘계학술대회 논문집
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• pp.711-712
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• 2013

• 한국건설관리학회논문집
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• 제21권4호
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• pp.12-20
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• 2020

도로 하부에 매설된 지하매설물에 대한 유지보수의 수요는 지속적으로 크게 증가하고 있으며, 과다한 소음 및 분진으로 인한 환경 문제 및 도심지 주민들의 민원으로 인해 친환경·저소음 도로 절단기에 대한 수요가 점차 증대되고 있다. 이에 따라 현재 사용되고 있는 저소음 절단기와 현재 개발되고 있는 친환경·저소음 절단기에 대한 절단 성능을 분석하고 개선사항을 검토해보자고 한다. 이를 위해 현장시공 사례를 바탕으로 절단기 작업절차에 따른 문제점과 개선 사항들을 도출하였다. 현장시공 사례 분석 결과, 절단 작업에 대한 생산성은 친환경·저소음 절단기(36.0초/m)가 저소음 절단기(37.6초/m)에 비해 다소 생산성이 향상되었으나 일부 구간에 결함이 발생되어 이에 대한 개선이 요구되었다.

• 한국주거학회:학술대회논문집
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• 한국주거학회 2009년 춘계학술발표대회 논문집
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• pp.118-123
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• 2009

The objective of this study is to define the plans of eco-friendly housing and the meaning of architectural imagination, and to classify diverse sources of the origins of architect's imagination to propose a desirable green housing plan. Generally, imagination which means the process of forming in the mind based on one's previous experience had been perceived negatively for a long time, however, today this perception has changed as new valuation that imagination is the only the motive of human being's behavior patterns comes out. Meanwhile, green design means planning the healthy life in the future by finding the way that people and environment can live together. In order to realize green design in our lives, some plans which concern environment, style, and alternative technology of housing. Especially, in interior design, not only by technology skills but also by green visual environment, eco-friendly houses exist. Therefore, this study examines several elements which gives green atmosphere into the house, and understands how architectural imagination comes out in eco-friendly housing design through verify some examples.