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유비쿼터스 도시 공간에서의 디지털 스케이프에 관한 연구 : 가로시설물의 디지털 특성요소 추출을 중심으로
인치호,정득영 弘益大學校 人文科學硏究所 2007 人文科學 Vol.15 No.-
Along with the development in cutting-edge digital technology, the street space is also being changed. Mobile telecommunication units and internet give a big change in a human being's lifestyle. And the ubiquitous computing is proceeding with expanding its application range from the indoor space to the street space. As the street furniture is the convenient facility that allows a human being's life in street space to be abundant, it is getting advanced. First of all, in terms of such phenomenon. this study analyzed the cases of a research on application of street space and the actual condition of a change in the number of individuals for the street furniture. through a literature research of ubiquitous. Also, it researched into the realities of using the street furniture of the walking-desired streets at Daehac-ro and Hongdae district. where arc two representative places related to digital generation. The next was carried out FGI (Focus Group Interview) with users of the street space in front of Hongik University and managers of the street furniture, and was researched into the use & management behavior, and recognition level on the street furniture. Thus, the key elements were extracted such as interchange of information for cultural activities. autom.uion for iuu-ractiou variabilirv III function. Finally the core elements for future vision of street furniture in this digital era were extracted in 31. namely, Information. Intellectualization. and Integration. This is considered to be applied to the establishment of direction in the process of high-tech digitalization in street furniture related to information hereafter.
탈묵펄프용 표백약품에 따른 표백 특성 및 표백폐수의 환경부하 영향
안치덕(Chi-Deuk Ahn),박정윤(Jung-Yoon Park),황성준(Sung-Jun Hwang),홍석준(Seok-Jun Hong),이진희(Jin-Hee Lee),김형진(Hyoung-Jin Kim),정성현(Sung-Hyun Chung) 한국펄프·종이공학회 2015 펄프.종이기술 Vol.47 No.1
DIP(deinked pulp) was bleached by FAS, Na₂S₂O₄ and H₂O₂, which are widely used in DIP bleaching process, in order to improve optical properties of DIP, and the bleaching efficiencies of DIP and environmental loads of waste water were compared, depending on bleaching chemical dosages. With the application of different bleaching chemicals, some positive improvements were shown in optical and physical properties of bleached pulp. However, the physical properties of bleached DIP and their characteristics of wastewater were remarkably different, depending on dosages and bleaching reagents. DIP chemicals with FAS and Na₂S₂O₄ have higher improvement in optical and physical properties than H2O2. Also, environmental loads such as pH, turbidity, SCODcr and cationic demand were decreased in reductive bleaching process. Despite of higher effectiveness of reductive bleaching process, there were some environmental problems caused by sulfur ions from FAS and Na₂S₂O₄. With the method of sulfur ion controls, it would be more effective than H₂O₂ bleaching process.