• Journal of Microbiology and Biotechnology
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• 제20권12호
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• pp.1717-1723
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• 2010

The integrated fixed-film activated sludge (IFAS) system is a variation of the activated sludge wastewater treatment process, in which hybrid suspended and attached biomass is used to treat wastewater. Although the function and performance of the IFAS system are well studied, little is known about its microbial community structure. In this study, the composition and diversity of the bacterial community of suspended and attached biomass samples were investigated in a full-scale IFAS system using a high-throughput pyrosequencing technology. Distinct bacterial community compositions were examined for each sample and appeared to be important for its features different from conventional activated sludge processes. The abundant bacterial groups were Betaproteobacteria (59.3%), Gammaproteobacteria (8.1%), Bacteroidetes (5.2%), Alphaproteobacteria (3.9%), and Actinobacteria (3.2%) in the suspended sample, whereas Actinobacteria (14.6%), Firmicutes (13.6%), Bacteroidetes (11.6%), Betaproteobacteria (9.9%), Gammaproteobacteria (9.25%), and Alphaproteobacteria (7.4%) were major bacterial groups in the attached sample. Regarding the diversity, totals of 3,034 and 1,451 operational taxonomic units were identified at the 3% cutoff for the suspended and attached samples, respectively. Rank abundance and community analyses demonstrated that most of the diversity was originated from rare species in the samples. Taken together, the information obtained in this study will be a base for further studies relating to the microbial community structure and function of the IFAS system.

• 한국주거학회논문집
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• 제27권3호
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• pp.47-58
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• 2016

The new paradigm of urban regeneration, would promote the comprehensive communal view. Therefore, the community role has become an important and necessary for regeneration of communities. It is necessary for urban regeneration which should be matched with the regional characteristics, to develop an evaluation framework that can objectively and accurately diagnose the status of community; so it can be an integrated prescription. A new alternative, asset-based approach may be an alternative to build the community based on opportunities and strengths, which focuses on community inside and things that community have. In this study, a community asset is defined as the tangible and intangible components in the community. A community asset evaluation system is developed through the content analysis related to previous studies of several researchers who investigated the asset-based approaches. Community assets are classified into seven types: human, social, cultural, natural, physical, economic, and political property. Each type is classified into components and establish as a framework with 3 levels in order to set the indicators which can be measured concretely.

• 공학교육연구
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• 제21권4호
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• pp.10-19
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• 2018

This study introduces an engineering design class which is experimental in a sense that it is planned and implemented with three key concepts such as learner-centered education, living lab and community based learning. With the class run in being connected with one regional community in Seoul, it focuses on its educational effects acquired through the living lab-based approach. And this research investigates the student's experiences of when, what and how they learn in a learner-centered class. It shows that, rather than taking professor's one dimensional lectures in classroom, the students learn actively when they face with the problem in the field. Students have come to carry out engineering design from the perspective of stakeholders, not from the supplier or producer's perspective in the process of meeting with the problem in reality. Team based collaborative activities are crucial in the entire design process. More importantly, students' design products have been transformed into more useful and meaningful ones as stakeholders of the local community have participated into the students' works. However, we need to recognize that there are some important issues that need to be solved institutionally and systematically in order for such educations to spread. This study suggests several educational arrangements for those issues.

• 공학교육연구
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• 제21권4호
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• pp.35-45
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• 2018

The purpose of this study is to develop a service learning education program for engineers and to investigate its educational effects. This study reviewed the concept and characteristics of service learning and examined the service learning education programs operated in higher education environments. The Service Learning Education Program was developed by integrating engineering design and community service activities. This program has been applied to the engineering education from 2014 to 2016. As a result of the study, the learners' satisfaction with service learning activities, empathy ability, and engineering design ability were improved. Based on the research results, practical implications are suggested to the instructors who want to develop the service learning education program for engineering students.

• The Plant Pathology Journal
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• 제38권6호
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• pp.583-592
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• 2022

Root-knot nematode disease is a widespread and catastrophic disease of tobacco. However, little is known about the relationship between rhizosphere bacterial community and root-knot nematode disease. This study used 16S rRNA gene sequencing and PICRUSt to assess bacterial community structure and function changes in rhizosphere soil from Meloidogyne incognita-infected tobacco plants. We studied the rhizosphere bacterial community structure of M. incognita-infected and uninfected tobacco plants through a paired comparison design in two regions of tobacco planting area, Yuxi and Jiuxiang of Yunnan Province, southwest China. According to the findings, M. incognita infection can alter the bacterial population in the soil. Uninfested soil has more operational taxonomic unit numbers and richness than infested soil. Principal Coordinate Analysis revealed clear separations between bacterial communities from infested and uninfested soil, indicating that different infection conditions resulted in significantly different bacterial community structures in soils. Firmicutes was prevalent in infested soil, but Chloroflexi and Acidobacteria were prevalent in uninfested soil. Sphingomonas, Streptomyces, and Bradyrhizobium were the dominant bacteria genera, and their abundance were higher in infested soil. By PICRUSt analysis, some metabolism-related functions and signal transduction functions of the rhizosphere bacterial community in the M. incognita infection-tobacco plants had a higher relative abundance than those uninfected. As a result, rhizosphere soils from tobacco plants infected with M. incognita showed considerable bacterial community structure and function alterations.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2007년도 동계학술발표대회 논문집
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• pp.82-87
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• 2007

In the present study, the simulation on the annual performance evaluation of a renewable energy systems with fuel cell driven compound source hybrid heat pump systems is applied to the heating and cooling of large community building. The large community building has the economical advantage to apply heat pump cooling and heating systems the long period operation. If air and ground source hybrid heat pump systems are combined, COP of the system can be increased largely. Fuel cell driven compound source hybrid heat pump system can reduced the fuel cost as well as thermal storage tank sharply.

• 공학교육연구
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• 제26권3호
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• pp.72-80
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• 2023

Recently, in terms of the future education, the need of the software education according to the 4th industrial revolution and the need of the ESG(environmental, social and governance) education according to social requests for sustainability are increasing at the same time. There may be a number of ways to satisfy the needs at the same time. In this paper, as an effort for meaningful implementation of the future education, a case study on the ESG engineering education based on the software education for community youth was analyzed and a future development direction was suggested. This ESG engineering education deals with the development and application of the program considering terms of target, method and implementation in order to enhance its systematicity and using physical computing and upcycling methods and a collaborative education support system. To verify the education program, a survey is performed and analyzed. Through this, the basis of an software education-based ESG engineering education model was established.

• 한국건설관리학회논문집
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• 제21권1호
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• pp.21-31
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• 2020

최근 생활인프라에 대한 관심과 재정투자가 점점 증가하고 있다. 국토교통부는 누구에게나 적용할 수 있는 보편적 생활서비스의 공급 및 지원 한계선으로 생활인프라 시설당 소요 시간거리를 제시하였다. 본 논문에서는 소요 시간거리를 산출할 때 기존에 주로 사용되던 직선거리 버퍼분석이 아닌 실제 이동 경로 및 소요시간을 산출하기 위하여 경로안내 API를 활용하는 방안을 제시하였다. 경로안내 API를 활용하면 횡단보도, 경사로 등과 같은 이동 제약요소를 반영할 수 있어 한층 현실성 있는 접근성 분석이 가능하다. 이 데이터를 활용하여 인천광역시 연수구를 대상으로 지역별 생활인프라 시설물 접근성 지수를 산출하였다. 또한 공간분석을 통하여 생활인프라 시설물로부터 소외된 지역을 파악하였다. 분석 결과 더욱 정확하고 현실성 있는 접근성 분석이 가능한 것으로 판단되었다. 본 연구의 접근성 측정방법은 각 지역의 도시재생 계획 및 생활인프라 시설 투자에 기초자료로 활용될 수 있을 것으로 사료된다.

• 한국미생물·생명공학회지
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• 제33권3호
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• pp.226-230
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• 2005

The microbial community during composting of gargage was analyzed using 16S rDNA PCR - DGCE (denaturing gradient gel electrophoresis). Pseudomonas spp. was found throughout the process, and thermophilic Bacillus spp. was dominated at the thermophilic stage. Six thermophilic bacteria were isolated and identified as B. caldoxylolyticus, B. thermoalkalophilus, and B. thermodenitrificans.

• 공학교육연구
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• 제13권6호
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• pp.180-187
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• 2010

<정보산업응용설계 및 경영>은 연세대학교 공과대학 정보산업공학과의 4학년 졸업설계 과목이다. 본 수업은 문제해결을 위한 방법론을 설계하고 적용하는 프로젝트 중심의 캡스톤디자인 과목으로, 최고학년으로서 그 동안 익힌 산업공학, 정보시스템공학, 공학경영 관련 지식을 종합하여 현장의 문제해결에 활용하게 한다. 프로젝트 결과물은 정보통신기술을 산업공학 분야에 활용한 '비즈니스모델' 또는 '서비스모델'의 주요 부분을 구성해야 하며 '설계물이 어떻게 해당 기관에 수익을 창출하며 운영될 것인가?'를 명시적으로 보여야 한다. 또한 지역사회경험학습(Community-Based Learning)을 도입하여 비영리기관의 실제 문제를 정보산업공학 지식을 적용하여 해결해 보도록 함으로써 공학이 사회를 위해 도움이 되도록 어떠한 방향으로 쓰여야 하는지 수강생이 느낄 수 있도록 한다. 외부기관 평가, 학생 만족도, 학습성과 평가 결과는 본 수업이 오래되지 않았음에도 ABEEK 산업공학 프로그램 교육성과를 잘 만족시키고 있다는 것을 보여주었다.