• Journal of Microbiology and Biotechnology
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• 제19권4호
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• pp.346-350
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• 2009

Although salt is known to influence the performance of nitrification significantly, it has not been well reported on how salt affects ammonia-oxidizing bacterial(AOB) community compositions and dynamics in wastewater treatment bioreactors. In this study, these questions were evaluated in a full-scale bioreactor treating saline wastewater. Clone library analysis for the ammonia monooxygenase subunit A gene revealed that AOB belonging to the Nitrosomonas europaea and the N. oligotropha lineages inhabited in the bioreactor. Terminal restriction fragment length polymorphism analysis for monthly samples demonstrated a fluctuation pattern among AOB populations, although AOB within the N. europaea lineage were dominant during the test period. Correlation analysis between patterns of terminal restriction fragments and environmental variables suggested that sodium, chloride, and sulfate were less important; rather, temperature was the most significant factor affecting the AOB community in the bioreactor.

• Industrial Engineering and Management Systems
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• 제11권2호
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• pp.148-154
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• 2012

Micro Electric Vehicles are considered as a solution for reducing $CO_2$ emissions, however, it is difficult to evaluate its impact in a local community when it has been introduced. In this study, we evaluated how to spread the Micro EV within the community, using the utility derived from a multinomial logit model, and analyze the effect on $CO_2$ emissions. The householder's utility model is based on an investigation about Kiryu citizen's activities of shopping, transportation methods, etc. Using the geographic information system, we get the distances of each householder and the stores, and estimate a multinomial logit model about the combination choices of shopping stores and transportation method.

• Journal of Microbiology and Biotechnology
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• 제23권12호
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• pp.1774-1778
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• 2013

Methylotrophs within biological activated carbon (BAC) systems have not received attention although they are a valuable biological resource for degradation of organic pollutants. In this study, methylotrophic populations were monitored for four consecutive seasons in BAC of an actual drinking water plant, using ribosomal tag pyrosequencing. Methylotrophs constituted up to 5.6% of the bacterial community, and the methanotrophs Methylosoma and Methylobacter were most abundant. Community comparison showed that the temperature was an important factor affecting community composition, since it had an impact on the growth of particular methylotrophic genera. These results demonstrated that BAC possesses a substantial methylotrophic activity and harbors the relevant microbes.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2008년도 하계학술대회 논문집 Vol.9
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• pp.455-456
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• 2008

In this study, we report that an electrical properties of OLEDs was investigated by the surface etching method of ITO Layer. The electrical properties of OLEDs was measured by IVL and optical properties by EL spectrum. The fundamental structure of OLEDs was ITO anode/TPD(400$\breve{A}$)/$Alq_3(600\breve{A})$/LiF(5$\breve{A}$)/Al(1200$\breve{A}$) cathode. The threshold voltage was low value according to the low resistance of surface. The luminance was increased by decreased surface resistance.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2013년도 추계학술대회 논문집
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• pp.563-563
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• 2013

Railway noise has been a social issues nowadays in our community. This paper discusses the environmental noise problem along railway lines. We overview the noise level and noise exposed populations due to conventional and high speed train operation at first. Then we introduce variety of noise reduction schemes to protect the community based on an engineering approach. Some applicationcases to reduce the noise will be demonstrated. Finally, we propose the noise barrier tunnel as a tool of a generic solution to reduce the community noise along railway lines.

• Journal of Microbiology and Biotechnology
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• 제20권3호
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• pp.485-493
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• 2010

A modified graphite felt electrode with neutral red (NR-electrode) was shown to catalyze the chemical oxidation of nitrite to nitrate under aerobic conditions. The electrochemically oxidized NR-electrode (EO-NR-electrode) and reduced NR-electrode (ER-NR-electrode) catalyzed the oxidation of $1,094{\pm}39$ mg/l and $382{\pm}45$ mg/l of nitrite, respectively, for 24 h. The electrically uncharged NR-electrode (EU-NR-electrode) catalyzed the oxidation of $345{\pm}47$ mg/l of nitrite for 24 h. The aerobic bacterial community immobilized in the EO-NR-electrode did not oxidize ammonium to nitrite; however, the aerobic bacterial community immobilized in the ER-NR-electrode bioelectrochemically oxidized $1,412{\pm}39$ mg/l of ammonium for 48 h. Meanwhile, the aerobic bacterial community immobilized on the EU-NR-electrode biochemically oxidized $449{\pm}22$ mg/l of ammonium for 48 h. In the continuous culture system, the aerobic bacterial community immobilized on the ER-NR-electrode bioelectrochemically oxidized a minimal $1,337{\pm}38$ mg/l to a maximal $1,480{\pm}38$ mg/l of ammonium to nitrate, and the community immobilized on the EU-NR-electrode biochemically oxidized a minimal $327{\pm}23$ mg/l to a maximal $412{\pm}26$ mg/l of ammonium to nitrate every two days. The bacterial communities cultivated in the ER-NR-electrode and EU-NR-electrode in the continuous culture system were analyzed by TGGE on the $20^{th}$ and $50^{th}$ days of incubation. Some ammonium-oxidizing bacteria were enriched on the ER-NR-electrode, but not on the EU-NR-electrode.

• 상하수도학회지
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• 제33권1호
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• pp.63-77
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• 2019

Traditional wastewater research mainly focuses on 1) estimating the amount of waste entering sewage treatment facilities, 2) evaluating the treatment efficiency of sewage facilities, 3) investigating the role of sewage treatment effluent as a point source, and 4) designing and managing sewage treatment facilities. However, since wastewater contains a variety of chemical and biological substances due to the discharge of human excreta and material used for daily living into it, the collective constituents of wastewater are likely a reflection of a community's status. Wastewater-based epidemiology (WBE), an emerging and promising field of study that involves the analysis of substances in wastewater, can be applied to monitor the state of a defined community. WBE provides opportunities for exploiting indicators in wastewater to fulfill various objectives. The data analyzed under WBE are those pertaining to selected natural and anthropogenic substances in wastewater that are a result of the discharge of metabolic excreta, illicit or legal drugs, and infectious pathogens into the wastewater. This paper reviews recent progress in WBE and addresses current challenges in the field. It primarily discusses several representative applications including the investigation of drug consumption across different communities and the management of community disease and health. Finally, it summarizes established indicators for WBE.

• 국제학술발표논문집
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• The 6th International Conference on Construction Engineering and Project Management
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• pp.654-655
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• 2015

In construction industry, while requiring advanced knowledge of technicians through a long experience, there is a problem with the tacit knowledge is not carried on the inner organization. Recent technological developments allow sharing and application of the tacit knowledge while technology tools use the CoP(Community of Practice) that mainly interacts between people. Clearly, the most consideration in stimulating CoP is the circulation of knowledge, namely the willingness to share and use knowledge with others. It is then important to explain why individuals factors to share and use knowledge with others when they have a choice. In this paper, we would like to report to find out about factors whether people are actually sharing and using the knowledge obtained in CoP. The results help to analyze which factors are influenced to be a successful CoP in construction industry. The implications for theory and future research direction are discussed.

• 한국정보통신학회논문지
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• 제23권3호
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• pp.299-304
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• 2019

현재 지역 주민들 간의 커뮤니티 활성화가 중요시 되고 있는 가운데 마을재생 사업, 마을 문화 활성화 사업 등이 주민 참여를 바탕으로 다양하게 추진되고 있다. 이처럼 지역사회의 주민이 주체가 되어 마을의 문제점을 제시하고 개선하는 것 중 하나가 커뮤니티 매핑이다. 이러한 커뮤니티 매핑은 주민들이 직접 마을 내 주요 이슈들을 지도화하는 과정을 통해 마을에 대한 주민들의 관심을 유도하고, 마을 계획과 정책을 결정하는데 있어 주민들의 자발적인 참여를 이끌어내는 것을 가능하게 한다. 본 연구에서는 커뮤니티 매핑을 활용해 부산 안창마을 지역 주민들의 쌍방향 소통을 위한 안전지도 애플리케이션을 개발하였다. 개발된 앱은 지역의 안전과 관련된 항목을 4가지로 분류해 지역의 현안과 문제점에 대한 정보를 지역주민이 직접 올리고 공유하는 역할을 한다. 또한 개발된 앱을 사용하여 작성된 마을의 안전 관련 현안과 문제점을 관련 행정 기관과 공유하고 개선할 수 있는 방안을 모색하는데 그 목적이 있다.

• 한국정보통신학회논문지
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• 제26권12호
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• pp.1826-1831
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• 2022

급격한 고령화는 진단과 치료중심의 의료패러다임을 예방과 관리를 강화하는 방향으로 전환을 요구한다. 본 논문에서는 부산광역시를 중심으로 지역사회기반 디지털 헬스케어시스템 구축 필요성을 전제로 디지털 헬스케어의 개념과 구체적 발전방향에 대해 논의한다. 디지털 헬스케어는 첨단 정보통신기술과 의료기술의 융합으로 예측적, 예방적, 개인적, 참여적 서비스의 특징을 갖고 있으며 인구구조변화 및 의료복지의 사회적 비용 증가에 대한 사회문제 해결 대안으로 제기되고 있다. 전국 지자체 중 유일하게 부산은 마을건강센터를 동 단위로 운영한다. 마을건강센터는 주민들의 주도적인 건강관리로 질병예방의 데이터 구축이 가능한 최소단위이다. 마을건강센터의 디지털 전환은 기본적인 건강데이터 및 사회적 정보를 활용하여 지역사회 내 예방적 돌봄 체계 축적을 가능하게 한다. 또한 주민 모두 접근 가능한 리빙랩의 주요 장소로 신기술 개발을 위한 테스트베드로 활용 가능하다. 실제로 개발된 제품과 서비스를 효율적으로 사용하기 위한 실증이 필요하다. 마지막으로 마을 간호사와 마을 활동가의 디지털 전환 역량 강화 교육은 보건과 복지가 결합된 융합형 서비스를 실제화할 수 있다.