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심현동(Hyundong Shim),이영호(Youngho Lee),김영욱(Youngwook Kim),최누리(Nuri Choi) 대한산업공학회 2009 대한산업공학회 춘계학술대회논문집 Vol.2009 No.5
In this paper, we develop a platform business models for telecommunication industry in converged environment. We analyze key drivers of converged environmental. The key drivers lead us to develop a business models. On the other hand, we redefine a business model in converged environmental according to characteristics of industrial change. By analyzing these concept, we design business models for platform industry. And we present platform business model including organizational model, service model and revenue model.
심현동(Hyundong Shim),이영호(Youngho Lee),김영욱(Youngwook Kim),최누리(Nuri Choi) 한국경영과학회 2009 한국경영과학회 학술대회논문집 Vol.2009 No.5
In this paper, we develop a platform business models for telecommunication industry in converged environment. We analyze key drivers of converged environmental. The key drivers lead us to develop a business models. On the other hand, we redefine a business model in converged environmental according to characteristics of industrial change. By analyzing these concept, we design business models for platform industry. And we present platform business model including organizational model, service model and revenue model.
PDMS Microchannel Surface Modification with Teflon for Algal Lipid Research
박재우,나상철,강명우,심상준,전누리 한국바이오칩학회 2017 BioChip Journal Vol.11 No.3
This paper presents a simple method for modifying the polydimethylsiloxane (PDMS) microfluidic channels with Teflon for algal lipid research. When culturing and staining algae inside microfluidic devices, the small molecule dyes absorbed by the microchannel surface render it difficult for imaging and quantification. PDMS surface coated with Teflon-AF resists the absorption of hydrophobic dye molecules (i.e., BODIPY and Nile red) as confirmed using fluorescence microscopy. Here, we introduce a surface modification of PDMS microchannel using Teflon-AF using a procedure of filling and drying to directly treat the PDMS surface with perfluorinated materials. This method can be used to prevent the absorption of fluorescent probe and obtain clear fluorescence micrographs without background signal from absorbed dye molecules on PDMS microchannel. We confirmed that contact angle of Teflon-coated PDMS (116.4°) is higher than that of unmodified PDMS (106.1°) and thus more hydrophobic. Furthermore, Teflon-coated PDMS surface had ~80% of oxygen transfer rate compared to that of native PDMS and good transparency in all visible light regions. Based on these characteristics, we successfully validated the visualization and quantification of intracellular lipid droplets in microalgae C. reinhardtii using BODIPY. We believe that our new method will expand microfluidic applications on characterization of biological lipid with fluorescence probes and biochemical markers.
권민정,김리예,김세영,김은진,서혜인,심누리,이혜진,천경민,최하은,신주현,이민경 이화여자대학교 간호과학대학 2016 이화간호학회지 Vol.- No.50
Purpose: The purpose of this study was to examine the correlation of alcohol use disorder, social support and depression of the college students. Method: In this descriptive design study, 334 university students were recruited through convenient sampling from October, 2015 to January, 2016. Questionnaires used for online Google docs were AUDIT-K(Alcohol Use Disorders Identification Test-Korea), MSPSS(Multidimensional Scale of Perceived Social Support) and SDS(Self - Rating Depression Scale). Data were analyzed with descriptive statistics, independent t-test, one way ANOVA with Scheffe's test, and Pearson’s coefficient using SPSS 22.0 program. Result: 230 students of the 334 college students(68.8%) were classified into alcohol use disorder group. There was a significant correlation between the degree of social support and depression among all participants(r=-.45, p=.000). However, there was no correlation between alcohol use disorder and depression(r=.23, p=.006) and between alcohol use disorder and social support(r=.02, p=.758). Conclusion: This study showed a relationship between social support and depression, not the alcohol use disorder. This result can be used as the basic data in nursing research about alcohol use disorder, social support and depression of college students. Also, Further researches are needed to examine the factors that affect alcohol use disorder of college students, as well as depression and social support.