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SNS(Social Network Site)를 통한 구전효과에 영향을 미치는 요인: 중국 웨이보(微博)를 중심으로
Shen Yi,박철 한국외국어대학교 국제지역연구센터 2015 국제지역연구 Vol.19 No.1
Recently there is an increasing trend of searching and sharing the information through social network service such as twitter, facebook, etc.. Social network service created a new channel of information flow via consumer-to-consumer communication and it can made the electronic word of mouth(eWOM) effect more powerful. Much research has been done about WOM effects in online environment, but few research has been done for electronic word of mouth(eWOM) effect through social network service in China, even though its expanding importance in practical and academic marketing environment. Therefore this study examined which factors influencing eWOM effects via social network service environments, especially Weibo(微博), the most popular social network service in China now. Before the empirical analyses, this study reviewed theoretical background for social network service and electronic word of mouth(eWOM). Then a research model that identifies tie strength, homophily, expertise, consensus, vividness, timeliness, trust and usefulness are as an important antecedent to eWOM effect in social network service environments was developed and tested. The results can be summarized as follows. First, the trust of information through social network service were strongest when the social network service users are similar. Secondly, the usefulness was more influenced by the independent variable timeliness rather than other independent variable. Thirdly, expertise are positively associated with the trust of information, whereas a negative relationship was found with the usefulness of information. The last one, consensus are positively associated with the usefulness but no relationship was found with the trust . 전 세계 소셜네트워크서비스(Social Network Service)의 이용자 수는 약 15억 명으로 전 세계 인구 60억 명 중 4분의 1이나 되는 수의 사람들이 이용하고 있다. 2013년 중국 SNS 이용자는 약 4억 5천명에 달할 것으로 추정될 만큼 빠른 성장을 보여주고 있다. SNS는 특정한 정보를 확산시키기 위한 구전채널로써 매우 매력적이다. SNS를 통한 정보는 단순한 정보가 아니라 자신이 알고 있는 사람을 통해 얻은 신뢰성 있는 정보이기 때문에 구전으로써도 가치가 높다. 본 연구에서 SNS를 통한 온라인 구전효과에 영향을 미치는 요인을 관계, 발신자, 정보특성으로 나누어 살펴보았다. 중국 SNS인 웨이보(微博) 사용자 315명을 대상으로 조사한 데이터를 가지고 가설을 검증해 본 결과 유대관계, 동질성, 발신자 전문성, 정보생생함은 구전의신뢰성에, 발신자 전문성, 정보생생함, 적시성, 구전신뢰성은 구전의 유용성에 유의한 영향을미쳤고, 구전 정보의 신뢰성과 유용성은 구전효과에 유의한 영향을 미치는 것으로 나타났다.
Measuring Image Similarity Based on Shape Context
Canlin Li,Shenyi Qian 보안공학연구지원센터 2015 International Journal of Multimedia and Ubiquitous Vol.10 No.3
Measuring image similarity is important for a number of image processing applications. The goal of research in objective image similarity assessment is to develop quantitative measures that can automatically predict perceived image similarity. In this paper, we propose a new objective approach of measuring image similarity based on shape context. We take the geometric structures of objects into account during measuring the image similarity by virtue of shape context which is a robust and compact, yet highly discriminative descriptor. Firstly we find visual salient regions of images by virtue of a regional contrast based saliency extraction algorithm and employ shape context to describe the shape of visual salient region. Then we detect shape deformations of visual salient regions between two images through estimating shape context distances, and accordingly compute the image similarity values. Real data have been used to test the proposed approach and very good results have been achieved, validating it.
Anguera, Gonzalo,Cha, Won-Young,Moore, Matthew D.,Lee, Juhoon,Guo, Shenyi,Lynch, Vincent M.,Kim, Dongho,Sessler, Jonathan L. American Chemical Society 2018 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.140 No.11
<P>A new expanded porphyrin, hexadecaphyrin-(1.0.0.0.1.1.0.1.1.0.0.0.1.1.0.1), is reported. It was obtained via the condensation of a hexapyrrolic derivative prepared in turn from a bipyrrole dialdehyde and a stable quaterpyrrole precursor. This hexadecaphyrin contains eight direct α-pyrrole-to-α-pyrrole linkages in its structure. It supports the formation of bimetallic complexes of both zinc and cobalt that are characterized by different conformational structures. Furthermore, a mixed zinc/cobalt macrocycle has been prepared. The cobalt bimetallic complex shows two stable conformations with the same oxidation state that are in equilibrium. All compounds have been characterized by common spectroscopic means, and single crystal X-ray diffraction structures were obtained for all macrocyclic compounds. DFT calculations and transient absorption spectra were used to study the electronic features of the complexes and the effect of conformational changes. This system shows promise as an accumulated heat sensor.</P> [FIG OMISSION]</BR>