• 제목/요약/키워드: $SO_3$ contents

검색결과 2,700건 처리시간 0.028초

서울 일부지역의 도로변 대기중 $SO_{2}$ 농도와 은행나무잎의 수용성 황함량과의 관계 (A Relationship Between AtmosPheric $SO_{2}$ Concentrations and Water Soluble Sulfur Contents in Gingko biloba in Seoul)

  • 박정숙;정문식;박석환
    • 한국환경보건학회지
    • /
    • 제17권1호
    • /
    • pp.1-12
    • /
    • 1991
  • The atmospheric SO$_{2}$ concentrations and water soluble sulfur contents in Ginkgo biloba were measured and analyzed in auto-measuring station, Kwangleung, and Yongmun from August 5 to October 21, 1990. The results of the study are as follows: 1. Atmospheric SO$_{2}$ concentrations between the seoul area(Pulkwang, Ssangmun, Myonmok, Oilurn) in which the concentrations exceeded the air quality standards and the surburb of seoul (Kwangleung, Yongmun) revealed the significant difference (p<0.01). 2. Water soluble sulfur contents in Ginkgo biloba in autumn were higher than those in Ginkgo biloba in summer (p<0.01). Water soluble sulfur contents in leaves showed a significant difference between seoul and its surburb(p<0.01). 3. Correlation between atmospheric SO$_{2}$ concentration and water soluble sulfur content of Ginkgo biloba in autumn was as follow Y=0.2714+9.8123 X, r=0.6362 (X: Airborne SO${_2}$ Concentration according to sampling location, Y: Water Soluble Sulfur Contents)

  • PDF

자동차용 마찰재에 함유된 세라믹분말의 함량에 따른 마찰특성 (Friction Characteristics of Automotive Friction Materials with Ceramic Powder Contents)

  • 이용진;류재경;김택남
    • 한국재료학회지
    • /
    • 제19권7호
    • /
    • pp.403-406
    • /
    • 2009
  • The friction characteristics of automotive brake friction materials that contained different ceramic content were investigated. Several kinds of raw materials, such as resin-based binder, reinforcing fiber, friction restraint, abrasive, and filling materials were mixed, pressed, and heated in order to make the brake friction materials. The contents of SiC and $BaSO_4$ changed from 5 vol% to 20 vol%, respectively. In addition to this, the content of $Al_2O_3$ adjusted from 1 vol% to 16 vol%. The surface morphology of the SiC containing sample appeared rough while more debris was observed when the contents of SiC increased. This implies that the SiC containing brake composite was not adequate for the automobile. However, the relatively smooth surface was observed in samples that contained the $Al_2O_3$. But the roughness was low with a content of 11 vol% $Al_2O_3$ compared to the other samples. This is consistent with the abrasive properties of the samples. In the case of $BaSO_4$ containing samples, the smoothes surface was observed in the contents of 15 vol% $BaSO_4$. Thus, it was concluded that the 11 vol% $Al_2O_3$ and 15 vol% $BaSO_4$ containing composite would be the optimum content for the brake composite. Similar to the results of the surface morphology, the abrasion resistance consistently decreased when the content of SiC increased. On the contrary, the sample that contained 11 vol% $Al_2O_3$ and 15 vol% $BaSO_4$ showed the highest abrasion resistance compared to the other samples.

농촌마을종합개발사업 내용분석과 시사점 -'04-'07년 사업대상지 사업을 중심으로 - (Contents Analysis on the Rural Village Development Projects: With Focus on Project Regions during 2004-2007)

  • 박한식;황길식;김영택
    • 농촌계획
    • /
    • 제14권4호
    • /
    • pp.121-128
    • /
    • 2008
  • The purpose of this study is to identify the trend of the contents of the plan that was implemented through contents analysis on the master plan project of rural village development projects that began in 2004. Contents analysis is based on the classification of business in the detailed enforcement regulations of rural village development project. Analysis on the project contents was conducted for 30 days from June 20 to July 20 for the 132 regions established in the master plan during the period from 2004 to 2007. The results of the analysis showed the following. First, scenery facilities, rural tourism, cultural welfare and income basis projects accounted for 76.5% of the total projects. Second, with regard to investment costs depending on the contents of the projects, cultural welfare, rural tourism and income basis projects accounted for 66.3% of the total investment costs. Third, it was found out that, with regard to the trend of change in the project contents by year, income basis projects were sharply reduced whereas cultural welfare and scenery facilities projects were increased. Finally, with regard to the analysis on the projects by region, it was found that Gangwon, Gyeonggi and Chungnam gave high weight on rural tourism, whereas Gyeongbuk, Jeonnam and Jeonbuk gave low weight on rural tourism. Particularly, Gyeongnam was found to have given low weight on income basis project.

디지털 콘텐츠 제작 기반의 통합 출력 및 배포 도구를 위한 웹 응용프로그램 (The Web Application Program for Integrated Print and Distribution Tools Based on Contents Editing)

  • 임양미
    • 디지털콘텐츠학회 논문지
    • /
    • 제12권3호
    • /
    • pp.309-318
    • /
    • 2011
  • 최근 웹의 발전은 포털(portal) 사이트 중심에서 사용자 제작 콘텐츠 사이트 중심으로 진화하고 있다. 따라서 많은 기업들이 사용자 편의를 위한 콘텐츠 제작용 웹 응용프로그램을 선보이고 있으나, 다양한 웹 브라우저와 이기종(heterogeneous) 장치에서 동작하고 있는 웹 응용프로그램은 다양한 원소스 데이터의 포맷 형식들로 인해 아직까지 배포와 관리에 대한 많은 문제점들을 갖고 있다. 본 논문에서는 사용자가 콘텐츠를 여러 가지 단말기에서 작업할 수 있는 환경과 멀티미디어 콘텐츠를 제작, 배포, 관리할 수 있는 통합형 출력 및 배포도구 (Integrative Displaying and Distributing Tool, IDD-Tool)를 제안한다. IDD-Tool은 사용자가 개인 맞춤의 작업환경에서 쉽게 콘텐츠 제작에 참여할 수 있고, IDD-Tool에서 제작된 콘텐츠를 유통시킬 수 있어 교육, 출판, 기업 등의 분야에서 널리 활용될 수 있을 것이라 예상된다.

시나리오 기반 스마트 단말기 대상의 지능형 콘텐츠 큐레이션 모델 (Intelligent Contents Curation(ICCuration) model for Smart Device based on Scenario)

  • 송수미;윤용익
    • 한국컴퓨터정보학회논문지
    • /
    • 제17권11호
    • /
    • pp.117-123
    • /
    • 2012
  • 스마트단말기에 장착된 다양한 센서들과 사용자의 앱 혹은 웹 활동 내역들은 사용자의 패턴을 파악하고 예상하기에 좋은 정보이다. 이러한 정보들을 적극적으로 활용하면 사용자 개인의 맞춤화가 가능한 콘텐츠 서비스도 기대할 수 있다. 이러한 기대는 콘텐츠 서비스가 단순히 스마트 단말기로 수많은 콘텐츠를 이용이 아닌 사용자가 원하고 즐겨 찾고 필요로 하는 콘텐츠를 선별하고 예상하여 추천하는 형태로의 변화를 촉진시키고 있다. 이러한 사용자 맞춤형 콘텐츠 서비스를 위해서는 마치 미술관이나 박물관에서의 큐레이터의 역할을 해주는 시스템이 모델이 필요하다. 이에 본 논문에서는 사용자 정보를 수집하고, 수집정보를 사용자 개인의 패턴 지식으로 형성, 패턴 지식을 기반으로한 추천 콘텐츠 선별의 과정을 가진 지능형 콘텐츠 큐레이션(Intelligent Contents Curation: ICCuration) 모델을 제안한다. ICCuration는 주요 작업에 따라 크게 3개의 하위 모듈이 존재한다. 수집된 사용자 정보는 시간에 따른 정보 요소들의 집합인 시나리오로 가공되며 시나리오를 기반으로 추천될 콘텐츠가 선택된다. 시나리오 상에서는 사용자의 기호 및 행동정보뿐만 아니라 사용하는 단말기정보도 포함된다. 이에 콘텐츠는 도메인 카테고리뿐만 아니라 단말기에 최적화 할 수 있는 미디어 형식까지도 사용자 맞춤화가 가능하다.

사소절 부의에 나타난 주생활 관리에 관한 내용분석 (Analysis of Housing Management as shown in Sa-So-Jul)

  • 주영애
    • 대한가정학회지
    • /
    • 제35권1호
    • /
    • pp.75-84
    • /
    • 1997
  • This study is a content analysis of housing management as shown in the Sa-so-jul. This book is written by Lee, Duk Moo in 1741 during Chosun dynasty. This contents relates to life management. The contents of housing management were storage cleaning and equipment management. The major findings this study are as follows. 1) Housing management was charged with woman. 2) Contents of housing managements were storage cleaning and equipment management. 3) It goes into detial. 4) Housing management relates to clothing & food management. 5) In the traditional society woman have to upright in her actions which is housing management. But today things are not what they used to be. A woman does not think anymore to do work housekeeping. But an idea of life does not change. So it is following as shown in the Sa-so-jul. 1) We must to clean for housing management. 2) Housing management is for my family and our neighborhood.

  • PDF

소음인(少陰人) 곽향정기산(藿香正氣散)의 위해물질에 대한 안전성 연구 (Safety on Hazardous Substances of Soeumin Kwakhyangjeonggi-san)

  • 서창섭;김정훈;황대선;신현규
    • 사상체질의학회지
    • /
    • 제22권3호
    • /
    • pp.132-140
    • /
    • 2010
  • 1. Objective: To compare the contents and transfer rate of hazardous substances in crude, washing solution, crude after washing, decoction and remnant after boiling. 2. Methods: The heavy metal contents of each step were measured by inductively coupled plasma mass spectrometer (ICP-MS) and mercury analyzer (MA-2). In order to analyze pesticides in each sample we used simultaneous multi-residue analysis of pesticides by GC/ECD, which was followed by GC/MSD analysis to confirm the identity of the detected pesticide in each sample. In addition, the contents of sulfur dioxide (SO2) were performed by Monier-Williams distillation method. 3. Results: 1) Contents (mg/kg) of heavy metals in decoction of all herbal medicine prescriptions were not detected. 2) Transfer rates (%) of heavy metals from crude to remnant were As (83.3%), Cd (100.0%), Pb (182.6%) and Hg (100.0%). 3) Contents (mg/kg) of residual pesticides were not detected. 4) Transfer rate (%) of sulfur dioxide (SO2) from crude to remnant was 44.2%. 4. Conclusion: Our results showed that boiled herbal medicine prescriptions which we take is safe from the hazardous substances.

경상북도(慶尙北道) 지역(地域)의 강수성분(降水成分) 조사(調査) (Survey on the Rain Components in Kyungbuk Province)

  • 서명순;김영석;김복진
    • 한국환경농학회지
    • /
    • 제10권1호
    • /
    • pp.59-66
    • /
    • 1991
  • 경북도내(慶北道內)에 위치한 성주, 구미, 김천, 영덕, 대구 등(等) 5개(個) 지역(地域)을 대상(對象)으로 1989년(年), 7월(月)${\sim}$8월(月) 사이에 강우량별(降雨量別)로 강우중(降雨中) pH. EC, $SO_4^{2-}$, $NO_3^-$, $Cl^-$ 등(等)의 함량(含量)을 분석조사(分析調査)한 결과(結果)를 요약(要約)하면 다음과 같다. 1. 조사지역(調査地域)에서 모두 초기강우(初期降雨)에는 산성우(酸性雨)로 나타났으며, 그 정도(程度)는 지역(地域)에 따라 차이(差異)가 있었지만 구미지역에서 가장 심(甚)하였다. 2. 강우중(降雨中) $SO_4^{2-}$함량(含量)은 도시(都市) 및 공업지역(工業地域)인 대구, 구미, 김천지역에서 높았다. 3. 강우량(降雨量)이 증가(增加)할수록 pH는 높아지고, 기외성분(其外成分)은 감소(減少)되었는데, 이러한 증감(增減)의 정도(程度)는 강우량(降雨量) 초기(初期)(2∼4 mm)와 함량(含量)이 높은 성분(成分)일술록 현저하였다. 4. 전기전도도(電氣傳導度)는 강우중(降雨中) $SO_4^{2-}$, $NO_3^-,\Cl^-$ 함량(含量)이 높을수록 높아졌으며, pH는 강우중(降雨中) $SO_4^{2-}$$NO_3^-$함량(含量)이 높을수록 낮아졌다.

  • PDF

A Study on Virtual Reality Contents Application in Broadcasting: Focused on KBS 3D History Documentary

  • Jang, Hae Rang;Park, Sung Hwan;Kwon, Soon Chul;Lee, Seung Hyun
    • International Journal of Internet, Broadcasting and Communication
    • /
    • 제8권2호
    • /
    • pp.31-37
    • /
    • 2016
  • History documentaries in Korea have developed various forms of production techniques to overcome the limits of insufficient historical records and videos, and dramatic elements that make the viewers immersed. Through diverse production techniques, history documentaries can maximize the factuality, vividness, and informativeness, allowing the viewers to understand and share the historical events. This paper analyzed the "immersion and experience" techniques of the programs that have been the main turning points of the history documentary so far and produced and realized the virtual reality through utilizing "Uigwe", a 3D history documentary broadcasted on KBS which showed the possibility of applying the virtual reality technique as a new broadcasting contents format.