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Multi-criteria Evaluation of Mobile Network Sharing Policies in Korea
송영근,조항정,Andrew P. Ciganek 한국전자통신연구원 2014 ETRI Journal Vol.36 No.4
Mobile operators in saturated markets increasinglyfavor mobile network sharing (MNS) over facility-basedcompetition. Previous research examining MNS primarilyfocused on its positive effects, while the negative effectswere largely overlooked. This study proposes a decisionmakingmodel using an analytic hierarchy processtechnique to evaluate decision-making criteria amongvarious types of MNS policies. The decision-making modelwas applied to Wireless Broadband services in Korea todetermine the relative importance of both positive andnegative evaluation criteria and preference amongmultiple types of MNS policies. Positive evaluation criteria(that is, efficiency) were far greater in importance thannegative evaluation criteria (that is, competition harm). The preference for adopting MNS among five alternativeapproaches was also revealed. The study findings offerimmediate policy insights in Korea and provide a decisionmakingframework for policy makers in other countries toutilize.
소염정장탕(消炎整腸湯)이 DSS로 유발(誘發)된 생쥐의 궤양성 대장염에 미치는 영향(影響)
송영근,류봉하,윤성우,Song, Young-Guen,Ryu, Bong-Ha,Yoon, Seong-Woo 대한한방내과학회 2008 大韓韓方內科學會誌 Vol.29 No.2
Objectives : This study was carried out to investigate the effects of Soyumjungjang-tang(SJT) on the experimental ulcerative colitis induced by dextran sulfate sodium(DSS) in mice. Methods : Ulcerative colitis was induced through supplying 4% DSS solution as the drinking water for 7 days in 6-week-old male ICR mice. The colitic mice were divided into three groups: the sample groups were orally administered SJT in doses of 25mg/kg(S25 group) or 100mg/kg(S100 group) once a day for 10 days, from 3 days before starting drinking the DSS solution, and the control(C) group was administered normal saline instead of SJT. The DSS solution or SJT was not administered to the normal(N) group. The length of colon, histologic finding, the activities of myeloperoxidase(MPO) and alkaline phosphatase(AP), and the expressions of $IL-1{\beta}$, IL-6, COX-2, $NF-{\kappa}B$, and $I{\kappa}B$ in colonic mucosa was checked using immunoblot, ELISA, etc. The activities of chondroitinase, tryptophanase, ${\beta}-glucuronidase$ and ${\beta}-glucosidase$ in stool were also measured. Results : The length of colon shortened, histologic finding deteriorated, the activities of MPO, AP, chondroitinase, tryptophanase, ${\beta}-glucuronidase$ and ${\beta}-glucosidase$, and the expressions of $IL-1{\beta}$, IL-6, COX-2, $NF-{\kappa}B$ increased, and the expression of $I{\kappa}B$ decreased in the C group. All measures, except $NF-{\kappa}B$, were restored in S25 group, but some measures deteriorated more in the S100 group than in the C group. Conclusions : According to the above results, it is supposed that SJT has a potential therapeutic effect on ulcerative colitis.