Scores. PubMed ID:http://www.ncbi.nlm.nih.gov/pubmed/21330321 Outcomes: The network evaluation discovered a coreperiphery structure exactly where central countries focused on active good discussions pertaining to e-cigarettes, whilst isolated and peripheral countries posted damaging subjects GSK2330672 price without the need of lots of responses. A qualitative examination of message subjects suggests that common subjects elicit far more interactions than these which are context certain. Conclusions: E-cigarettes are a polarising topic which will be observed in how nations seem to discuss associated topics with others who share precisely the same opinions. Additional work is necessary to assist communities stay informed of current analysis, and diffuse objective information and facts. Network and sentiment analyses present a powerful mixture of methodologies that will aid help such efforts.Strengths and limitations of this studyThe study of e-cigarettes has generally focused on awareness plus the possible for positive aspects or harm. This paper takes a unique strategy, and examines an international neighborhood of tobacco control advocates, at a time when e-cigarettes were nonetheless somewhat unknown. We apply contemporary network and sentiment analysis techniques to provide a wealthy understanding of the attitudes and relationships in how a diverse community faced the challenge of an unexpected development in their efforts to assistance worldwide tobacco handle. Our findings might help identify– even within a group of like-minded advocates– exactly where gaps in communication, or differences in opinions, may well exist and how they may be resolved. 1 concern in using a dictionary of predefined sentiment scores will be the problem of context. General scores are usually derived from substantial corpuses, but topic-specific research could be sensitive to how particular terms are applied. Applying a additional customised dictionary with improved semantic algorithms could assist generate more correct sentiment scores.Division 
of Preventive Medicine, University of Southern California, Los Angeles, California, USA Correspondence to Dr Kar-Hai Chu; karhaichusc.eduINTRODUCTION Facts and communication technologies have grow to be part of our everyday lives. The emergence of Internet 2.0 technologies affords the casual user a more active and participatory function in all aspects of the on-line planet.1 That is particularly accurate of social networking web-sites (SNS), where niche communities have created rapidly.two SNS have demonstrated that people can and do type and sustain successful relationships on-line. Internet media has enabled the growth of activist networks and created a wealthy database of interactions concerning different policies, social movements, along with other causes. As an example, web-sites such as Facebook and Twitter happen to be central in helping spread the Occupy Wall Street3 and Arab Spring4 movements. These actions had been effectively publicisedChu K-H, et al. BMJ Open 2015;5:e007654. doi:10.1136bmjopen-2015-Open Access and serve as tangible examples of net activism. The involved groups had been able to boost coordination of activities within a large-scale setting, recruit high-profile celebrities to their causes, and record and show facts for the public to determine. Tools within SNS afforded members the capability to act within certain roles, whether to initiate events, spread information or coordinate efforts. The on-line setting also helped break by means of geographic barriers and support international communication. It is now comparatively simple for activists to conduct and coordinate events around the world. Inside a parallel narrative, e-cigarettes have witnessed a.