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ShanLan, 민대환(DaihwanMin) 한국IT서비스학회 2011 한국IT서비스학회 학술대회 논문집 Vol.2011 No.9
최근 모바일 시장이 스마트폰의 등장으로 인해 아주 빨리 변하고 있다. 종전에는 컴퓨터를 통해 수행했던 가능들을 이제 거의 다 휴대용 기기로 수행할 수 있는 상태이다. 그 중에서도 사회적 인간 관계망 즉 "SNS"의 인기가 많고, SNS앱(application)은 새로운 소통의 수단으로 이용가지가 매우 높게 인식되고 있다. 더욱이 위치가반서비스(LBS)는 단순히 위치를 알려주는 기능뿐만 아니라 SNS기능을 결합하여 제공하고 있다. 예를 들면 foursquare, I'm In 등의 LBS를 통해 소비자간 연결을 할 수도 있고, 기업도 소비자의 개인정보를 얻을 수 있기 때문에 최근 소셜LBS가 주목을 받고 있다. 기존의 LBS와 달리 소셜LBS는 세가지 기능을 제공하는데, 첫째는 기본적 위치서비스 즉 'Find it 서비스(지도)' 이고, 둘째는 소셜 서비스 즉 'Share it 서비스(check-in)' 이며, 마지막으로 상업서비스 즉 'Buy it 서비스(할인쿠폰)' 이다. 본 연구는 스마트폰 사용자가 새로운 형태의 서비스인 소셜LBS를 이용하려는 의도에 영향을 미치는 요인을 파악하고자 한다. 선행 연구에서 제시한 지각된 유용성, 지각된 사용성, 지각된 신뢰도가 소셜 LBS의 이용의도에 영항을 미칠 것으로 예상하여 연구 모형에 포함시켰으며, 이들 지각된 유용성, 지각된 사용성, 지각된 신뢰도에 영향을 미지는 요인으로 지각된 위험, 지각된 혜택, 모바일리터러시(Iitereacy), 사회성의 네 가지 요인을 포함시켜 실증적으로 조사하고자 한다.
Li, Shanlan,Kim, Jooil,Park, Sunyoung,Kim, Seung-Kyu,Park, Mi-Kyung,Mü,hle, Jens,Lee, Gangwoong,Lee, Meehye,Jo, Chun Ok,Kim, Kyung-Ryul American Chemical Society 2014 Environmental science & technology Vol.48 No.1
<P>The sources of halogenated compounds in East Asia associated with stratospheric ozone depletion and climate change are relatively poorly understood. High-precision in situ measurements of 18 halogenated compounds and carbonyl sulfide (COS) made at Gosan, Jeju Island, Korea, from November 2007 to December 2011 were analyzed by a positive matrix factorization (PMF). Seven major industrial sources were identified from the enhanced concentrations of halogenated compounds observed at Gosan and corresponding concentration-based source contributions were also suggested: primary aluminum production explaining 37% of total concentration enhancements, solvent usage of which source apportionment is 25%, fugitive emissions from HCFC/HFC production with 11%, refrigerant replacements (9%), semiconductor/electronics industry (9%), foam blowing agents (6%), and fumigation (3%). Statistical trajectory analysis was applied to specify the potential emission regions for seven sources using back trajectories. Primary aluminum production, solvent usage and fugitive emission sources were mainly contributed by China. Semiconductor/electronics sources were dominantly located in Korea. Refrigerant replacement, fumigation and foam blowing agent sources were spread throughout East Asian countries. The specified potential source regions are consistent with country-based consumptions and emission patterns, verifying the PMF analysis results. The industry-based emission sources of halogenated compounds identified in this study help improve our understanding of the East Asian countries’ industrial contributions to halogenated compound emissions.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/esthag/2014/esthag.2014.48.issue-1/es402776w/production/images/medium/es-2013-02776w_0003.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/es402776w'>ACS Electronic Supporting Info</A></P>
Emissions of Halogenated Compounds in East Asia Determined from Measurements at Jeju Island, Korea
Li, Shanlan,Kim, Jooil,Kim, Kyung-Ryul American Chemical Society 2011 Environmental science & technology Vol.45 No.13
<P>High-frequency in situ measurements at Gosan (Jeju Island, Korea) during November 2007 to December 2008 have been combined with interspecies correlation analysis to estimate national emissions of halogenated compounds (HCs) in East Asia, including the chlorofluorocarbons (CFCs), halons, hydrochlorofluorocarbons (HCFCs), hydrofluorocarbons (HFCs), perfluorocarbons (PFCs), sulfur hexafluoride (SF<SUB>6</SUB>), and other chlorinated and brominated compounds. Our results suggest that overall China is the dominant emitter of HCs in East Asia, however significant emissions are also found in South Korea, Japan and Taiwan for HFC-134a, HFC-143a, C<SUB>2</SUB>F<SUB>6</SUB>, SF<SUB>6</SUB>, CH<SUB>3</SUB>CCl<SUB>3</SUB>, and HFC-365mfc. The combined emissions of CFCs, halon-1211, HCFCs, HFCs, PFCs, and SF<SUB>6</SUB> from all four countries in 2008 are 25.3, 1.6, 135, 42.6, 3.6, and 2.0 kt/a, respectively. They account for approximately 15%, 26%, 29%, 16%, 32%, and 26.5% of global emissions, respectively. Our results show signs that Japan has successfully phased out CFCs and HCFCs in compliance with the Montreal Protocol (MP), Korea has started transitioning from HCFCs to HFCs, while China still significantly consumes HCFCs. Taiwan, while not directly regulated under the MP, is shown to have adapted the use of HFCs. Combined analysis of emission rates and the interspecies correlation matrix presented in this study proves to be a powerful tool for monitoring and diagnosing changes in consumption of HCs in East Asia.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/esthag/2010/esthag.2010.45.issue-13/es104124k/production/images/medium/es-2010-04124k_0005.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/es104124k'>ACS Electronic Supporting Info</A></P>