http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
첨가제가 유기성 폐기물 퇴비화 과정 중 온실가스 발생에 미치는 영향: 리뷰 및 데이터 분석
정석순 ( Seok-soon Jeong ),박병준 ( Byung-jun Park ),윤정환 ( Jung-hwan Yoon ),이상필 ( Sang-phil Lee ),양재의 ( Jae-e. Yang ),김혁수 ( Hyuck-soo Kim ) 한국환경농학회 2023 한국환경농학회지 Vol.42 No.4
Composting has been proposed for the management of organic waste, and the resulting products can be used as soil amendments and fertilizer. However, the emissions of greenhouse gases (GHGs) such as CO<sub>2</sub>, CH<sub>4</sub>, and N<sub>2</sub>O produced in composting are of considerable concern. Hence, various additives have been developed and adopted to control the emissions of GHGs. This review presents the different additives used during composting and summarizes the effects of additives on GHGs during composting. Thirty-four studies were reviewed, and their results showed that the additives can reduce cumulative CO<sub>2</sub>, CH<sub>4</sub>, and N<sub>2</sub>O emission by 10.5%, 39.0%, and 28.6%, respectively, during composting. Especially, physical additives (e.g., biochar and zeolite) have a greater effect on mitigating N<sub>2</sub>O emissions during composting than do chemical additives (e.g., phosphogypsum and dicyandiamide). In addition, superphosphate had a high CO<sub>2</sub> reduction effect, whereas biochar and dicyandiamide had a high N<sub>2</sub>O reduction effect. This implies that the addition of superphosphate, biochar, and dicyandiamide during composting can contribute to mitigating GHG emissions. Further research is needed to find novel additives that can effectively reduce GHG emissions during composting.
정석순 ( Seok Soon Jung ),주현정 ( Hyun Jeong Ju ),이흥수 ( Heung Soo Lee ) 대한예방치과·구강보건학회 2015 大韓口腔保健學會誌 Vol.39 No.2
Objectives: The purpose of this study was to understand the dental caries pattern in permanent dentition among Korean adolescents aged 12-16 years. Methods: This study comprised 5,301 teenagers, aged 12-16 years. We analyzed the dental caries pattern in patients with permanent dentition using data from the 2006 Korean National Oral Health Survey. The methods used for data analysis included frequency analysis, correlation analysis, cluster analysis, and multidimensional scaling (MDS). Results: With cluster analysis, it was difficult to clearly distinguish between anterior and posterior caries, and categorization was difficult owing to the mandibular first premolar and maxillary lateral incisor. The molars had severe caries, and results of the cluster analysis categorized this as clusters independent from other teeth; therefore, efforts must be made to prevent dental caries in molars. The maxillary premolars had the highest incidence of caries followed by the molars, and accordingly, these formed independent clusters, with the exception of the molar. During the eruption stage, despite the secondary premolar erupting later than the first premolar, there was a higher caries incidence in the secondary premolar. Out of the anterior teeth, the maxillary later incisor had the highest incidence of caries and formed an independent cluster. The multidimensional scaling (MDS) results clearly showed the molar teeth cluster. Conclusions: For epidemiological research on dental caries, a caries pattern analysis should be conducted, and information on the caries pattern in permanent dentition can be used for the prevention and management of dental caries.
박정배 ( Jeong Bae Park ),서영일 ( Young Il Seo ),정석순 ( Seok Soon Jung ) 한국이벤트컨벤션학회 2005 이벤트 컨벤션 연구 Vol.1 No.-
This research is to seek to provide an effective way of approach for the performing arts managers under the current circumstances of incongruities and inequalities in achieving the sponsorship. The arts managers in the performing arts sector should provide a cost-effective yet quality oriented production procedure by investing human resources for the organization along with providing the sponsorship manuals especially for the performing arts sector. It is also required to achieve the systemized sponsorship process and develop enhanced return services that are appropriate for the objective of the targeted corporate. As the researchers were unavoidably faced with the lacks of preceded research materials, constant and detailed research/studies are necessary to develop more concrete direction and to define the roles of the arts managers in the performing arts sector.