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The drive toward ubiquitous communications has long been encompassed by the concept of a connected or smart city. The idea that data transfer and real-time data analysis can enhance the quality of life for urban inhabitants is compelling, and one can easily envision the provision of exciting new services and applications that such an information- driven city could provide. The challenge in achieving a truly smart city stems largely from communications technologies -- fixed line, wireless, backhaul, and fronthaul -- and how these are combined to provide fast, reliable, and secure communications coverage. Here, we report on the key observations from the Connected OFCity Challenge competition, held at OFC 2017, which addressed the fixed and wireless access network requirements for smart cities. It is shown that from a technological perspective, future optical networks will be capable of securely supporting extremely low-latency and high-bandwidth applications. However, as shown by using Networked Music Performance as a particularly challenging example application, how readily this is achieved will depend on the interplay between wired and wireless access services. [ABSTRACT FROM AUTHOR]

Aims. This article analyzes the digital childhood vaccination information network for vaccine-hesitant parents. The goal of this study was to explore the structure and influence of vaccine-hesitant content online by generating a database and network analysis of vaccine-relevant content. Method. We used Media Cloud, a searchable big-data platform of over 550 million stories from 50,000 media sources, for quantitative and qualitative study of an online media sample based on keyword selection. We generated a hyperlink network map and measured indegree centrality of the sources and vaccine sentiment for a random sample of 450 stories. Results. 28,122 publications from 4,817 sources met inclusion criteria. Clustered communities formed based on shared hyperlinks; communities tended to link within, not among, each other. The plurality of information was provaccine (46.44%, 95% confidence interval [39.86%, 53.20%]). The most influential sources were in the health community (National Institutes of Health, Centers for Disease Control and Prevention) or mainstream media (New York Times); some user-generated sources also had strong influence and were provaccine (Wikipedia). The vaccine-hesitant community rarely interacted with provaccine content and simultaneously used primary provaccine content within vaccine-hesitant narratives. Conclusion. The sentiment of the overall conversation was consistent with scientific evidence. These findings demonstrate an online environment where scientific evidence online drives vaccine information outside of the vaccine-hesitant community but is also prominently used and misused within the robust vaccine-hesitant community. Future communication efforts should take current context into account; more information may not prevent vaccine hesitancy. [ABSTRACT FROM AUTHOR]

Around the world, municipalities have been making substantial investments into broadband access infrastructure to accelerate the build-out of an urban phenomenon that has become known as a smart or connected city. At the 2016 Optical Fiber Communications Conference, a team contest, the Connected OFCity Challenge, was held to discuss the technological innovations and to examine dependencies and intricacies of a connected city project. The participants, four teams of experts coming from a cross-section of the industry, presented and defended their visions of future applications and innovative architecture and technologies to realize the interconnection. This paper provides a synthesis of the four competitive proposals offered for the contest and their ensuing discussions. [ABSTRACT FROM PUBLISHER]

Scientists and health communication professionals expressed frustration over the relationship between misinformation circulating on the Internet and global public perceptions of and responses to the Ebola epidemic originating in West Africa. Using the big data platform Media Cloud, we analyzed all English-language stories about keyword “Ebola” published from 1 July 2014 to 17 November 2014 from the media sets U.S. Mainstream Media, U.S. Regional Media, U.S. Political Blogs, U.S. Popular Blogs, Europe Media Monitor, and Global Voices to understand how social network theory and models of the networked global public may have contributed to health communication efforts. 109,400 stories met our inclusion criteria. The CDC and WHO were the two media sources with the most inlinks (hyperlinks directed to their sites). Twitter was fourth Significantly more public engagement on social media globally was directed toward stories about risks of U.S. domestic Ebola infections than toward stories focused on Ebola infections in West Africa or on science-based information. Corresponding public sentiments about Ebola were reflected in the policy responses of the international community, including violations of the International Health Regulations and the treatment of potentially exposed individuals. The digitally networked global public may have influenced the discourse, sentiment, and response to the Ebola epidemic. [ABSTRACT FROM PUBLISHER]

This article examines the public debate over net neutrality in the United States in 2014. We compiled, mapped, and analyzed more than 15,600 stories published on net neutrality, augmented by data from Twitter, Bitly, and Google Trends. Using a mixedmethods approach that combines link analysis with qualitative content analysis, we describe the evolution of the debate over time and assess the role, reach, and influence of different media sources and advocacy groups. By three different measures, we find that the pro-net neutrality forces decisively won the online public debate and translated this into a successful social mobilization effort. We conclude that a diverse set of actors working in conjunction through the networked public sphere played a pivotal role in turning around the Federal Communications Commission policy on net neutrality. [ABSTRACT FROM AUTHOR]

This is the second of a two-part paper intended to provide technical insight and rationales behind the recently approved ITU-T G.989.2 Recommendation: the physical media dependent layer specification of the 40-gigabit-capable passive optical networks (NG-PON2). While Part 1 of the paper discusses topics related to the optical link design, Part 2 focuses on wavelength control, technology feasibility, management and control channel design, and potential future standardization directions of such a multi-wavelength PON system. As the NG-PON2 system will continue to evolve, technology extensions are also discussed to provide guidance for future research. [ABSTRACT FROM PUBLISHER]

NG-PON2 is the industry's first multiple wavelength (per direction), standards-based passive optical network system that is compatible with power-split optical distribution networks. The physical media dependent layer recommendation (ITU-T G.989.2) is the result of over three years of collaborative work by members of the FSAN and ITU-T Study Group 15, Question 2 groups. This two-part paper provides the technical insight and rationales behind the recently approved standard. The first part of the paper focuses on optical link design topics, including the optical distribution network characteristics, wavelength plan, Raman fiber nonlinearity related degradation, and interchannel cross-talk tolerance. It also describes the wavelength-tuning capability of optical network units and its impact on the physical media dependent layer specification. [ABSTRACT FROM PUBLISHER]

This article investigates the public debate over proposed U.S. legislation designed to give prosecutors and copyright holders new tools to pursue suspected online copyright violations. We compiled, mapped, and analyzed a set of 9,757 stories published over 16 months relevant to the Combating Online Infringement and Counterfeits Act (COICA), Stop Online Piracy Act (SOPA), and PROTECT IP Act (PIPA). This study applies a mixed-methods approach that combines text and link analysis with human coding and informal interviews to map the evolution of the controversy over time and to analyze the mobilization, roles, and interactions of various actors. We find a vibrant, diverse, and decentralized networked public sphere that exhibited broad participation, leveraged topical expertise, and successfully reframed a debate and focused public sentiment to shape national public policy. A network of small-scale commercial tech media, nongovernmental organizations (NGOs), and individuals fulfilled the fourth estate function; traditional media then amplified the work of these actors. The campaign involved substantial experimentation and rapid development of mobilization strategies. We observe an increased public awareness of an agenda originating in the networked public sphere, which emerged successfully despite substantial expenditures attempting to produce a mass media narrative that favored the legislation. Moreover, we witness what we call an attention backbone, in which more trafficked sites amplify less-visible individual voices on specific subjects. The data suggest that, at least in this case, the networked public sphere enabled a dynamic public discourse that involved both individual and organizational participants and offered substantive discussion of complex issues contributing to affirmative political action. [ABSTRACT FROM PUBLISHER]

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The Internet is a battleground where fights for technical, social, and political control are waged, including between governments and their citizens, between separate governments, and between competing commercial interests. This issue examines the challenges of Internet governance, current practices, and limitations in the existing structures of control. In particular, it shows how the practice of censorship has become more widespread, but authorities being more transparent in their actions and policies, combined with independent verification that authorities are being honest, can reduce the risks. However, there are challenges in monitoring censorship, and this issue examines how technical, political, legal, and economic analysis can be combined to hold governments to account for their actions. [ABSTRACT FROM PUBLISHER]