By the end of 2018, 42 years after the landing of the two Viking seismometers on Mars, InSight will deploy onto Mars’ surface the SEIS ( S eismic E xperiment for I nternal S tructure) instrument; a six-axes seismometer equipped with both a long-period three-axes Very Broad Band (VBB) instrument and a three-axes short-period (SP) instrument. These six sensors will cover a broad range of the seismic bandwidth, from 0.01 Hz to 50 Hz, with possible extension to longer periods. Data will be transmitted in the form of three continuous VBB components at 2 sample per second (sps), an estimation of the short period energy content from the SP at 1 sps and a continuous compound VBB/SP vertical axis at 10 sps. The continuous streams will be augmented by requested event data with sample rates from 20 to 100 sps. SEIS will improve upon the existing resolution of Viking’s Mars seismic monitoring by a factor of at 1 Hz and at 0.1 Hz. An additional major improvement is that, contrary to Viking, the seismometers will be deployed via a robotic arm directly onto Mars’ surface and will be protected against temperature and wind by highly efficient thermal and wind shielding. Based on existing knowledge of Mars, it is reasonable to infer a moment magnitude detection threshold of at epicentral distance and a potential to detect several tens of quakes and about five impacts per year. In this paper, we first describe the science goals of the experiment and the rationale used to define its requirements. We then provide a detailed description of the hardware, from the sensors to the deployment system and associated performance, including transfer functions of the seismic sensors and temperature sensors. We conclude by describing the experiment ground segment, including data processing services, outreach and education networks and provide a description of the format to be used for future data distribution. Electronic Supplementary Material The online version of this article (10.1007/s11214-018-0574-6) contains supplementary material, which is available to authorized users.

As recent feminist studies have recognized, breastfeeding is an interesting area of investigation since it encompasses several social and cultural issues involving both the private and the public sphere. These range from how motherhood is lived and interpreted, the representation of the body, how children are reared, women’s self-representation, breastfeeding support, and maternal work. The article illustrates a qualitative analysis of a sample of Instagram images tagged with breastfeeding-related words, with the aim of analyzing how breastfeeding is represented and the relationship between private and public discourses. For this reason, images coming from both mothers and breastfeeding promoters were analyzed. The analysis shows that breastfeeding representation on Instagram confirms, and also goes beyond, the common image of breastfeeding a newborn, showing toddlers’ breastfeeding or mothers pumping breastmilk. It also shows that breastfeeding may be connected with a wider approach to parenthood, based on proximity, and that children are active subjects of the decisions taken. The research indicates that the relationship between public and private discourses is an overlapping of shades. On one hand, research results showed several strategies enacted by parents for protecting their children’s privacy; on the other hand, the functions of images posted veer between fixing a private moment and creating public discourses using specific hashtags aimed, for example, at normalizing public breastfeeding or offering new types of support. Instagram appears, then, as a platform where personal choices and beliefs can flow into public discourse and a place for investigating how public discourses and social and cultural issues (such as breastfeeding promotion and representation) shape the way that breastfeeding is lived.

Research on the digital and online environment poses several ethical questions that are new or, at least, newly pressing, especially in relation to youth. Established ethical practices require that research have integrity, quality, transparency, and impartiality. They also stipulate that risks to the researcher, institution, data, and participants should be anticipated and addressed. But difficulties arise when applying these to an environment in which the online and offline intersect in shifting ways. This paper discusses some real-life "digital dilemmas" to identify the emerging consensus among researchers. We note the 2012 guidelines by the Association of Internet Researchers, which advocates for ethical pluralism, for minimizing harm, and for the responsibility of the researcher where codes are insufficient. As a point of contrast, we evaluate Markham's (2012) radical argument for data fabrication as an ethical practice. In reflecting on how researchers of the digital media practices of youth resolve their dilemmas in practice, we take up Markham's challenge of identifying evolving practice, including researchers' workarounds, but we eschew her solution of fabrication. Instead, we support the emerging consensus that while rich data are increasingly available for collection, they should not always be fully used or even retained in order to protect human subjects in a digital world in which future possible uses of data exceed the control of the researcher who collected them.

Over the past few years, public health organizations have adopted new communication practices, such as social media communication, framed by the concepts of Health 2.0 and Medicine 2.0. These concepts need to be reconsidered in the light of the transformation of social media as digital platforms. This article aims to define and critically discuss the concept of the platformization of healthcare communication, investigating the impact of social media incorporation on the local health authorities’ Facebook communication during the early phase of the COVID-19 emergency in Italy. Findings show the progressive incorporation of the mechanisms of platformization by local health authorities and the progressive shift of their Facebook pages from connectors to complementors of healthcare communication and services during the early phase of the pandemic. Conclusions critically discuss the incorporation of social media into the communication strategies of the public healthcare sector.

If, on the one side, the web offers us a platform where content is searchable and replicable, on the other one, it cannot be forgotten that web content is perishable, unstable and subject to continuous change. This is a challenge for scholarly research about the historical development of web. The research here presented analyzed the historical development of weblogs in Italy investigating their technological, cultural, economic, and institutional dimensions. The approach chosen mixed participant observation, in-depth interviews, and semiotic analysis of blogs and blog posts. Since an important part of the research was about the development of platforms, graphics, layouts, and technology, beside interviews older versions of blogs were retrieved using Internet Wayback Machine. Even if partial versions of the blogs were archived, this part of the research was important to complete data obtained with interviews and blogs' analysis, since individual memory is not always accurate or some blogs were in the meanwhile closed and original posts were not accessible anymore.

In recent years, digital influencers or digital opinion leaders have emerged as a global phenomenon, one providing a rich field of investigation for several disciplines from sociology to marketing. The goal of the paper is to study this phenomenon by adopting an ecological approach, not focusing only on a single dimension but observing the influencer system as an environment with its own rules and subjects, examining the other components of the system and tracing the relationships between them. The original contribution of this paper is to conceptualize influencers as socio-technical actors, i.e. as social subjects that operate within technological platforms, and to adopt an interdisciplinary approach, starting from sociological and marketing studies on the influencer phenomenon and then moving on to STS studies that have focused on the social shaping of technology to shed light on how the influencers are transforming the (social) media system in which they are inserted and then the chain of communication industry. The argument will therefore start by reviewing the theories that address this phenomenon and by sketching a genealogy, tracing its roots in the cultural and social context of the participatory web and web 2.0. It will move, then, to investigate the dynamics of shaping social media platforms, reviewing the studies that have investigated them, from the Social Shaping of Technology approach to platform studies. The paper will apply the analysis to the Italian context, unfolding the dynamics of influence with the support of the case study of ClioMakeUp (the leading beauty creator in Italy), examples, and grey literature from the Italian context. In the final part, the paper will map the traces of the influencer system in Italy and the communication chain, focusing on the processes of mutual shaping between brands, communication agencies, influencer enterprises, regulatory bodies, media, and of course platforms. The STS approach proved to be useful in disentangling the several actors of the system, but as platforms evolved the opportunities for mutual shaping have gradually diminished as the balance of power seems to be tending in favor of the platforms. More research is needed to further understand the concepts of closure, script, and relevant social groups within social media platforms.

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