Institutional maintenance work refers to actors’ deliberate effort to maintain an institution. This paper examines how actors use authentication, i.e., the relational constitution of an artefact as original or as a genuine expression of a particular type, style or person, to accomplish institutional maintenance work. We investigated contemporary adjustments to six listed buildings. These works were undertaken to keep these buildings functional while at the same time protecting their listing; by doing so they contributed to maintain the institution of Architectural Heritage. Our analysis identifies three forms of authentication: material consolidation, crafts mobilization and character enhancement. We elaborate on each of them and explain their institutional underpinnings and outcomes. The paper concludes with an articulation of authentication as a potent form of institutional maintenance work. Taking its starting point in materiality, authentication is a relational practice that helps maintain institutions relying on irreplaceable artefacts for their maintenance.

This paper provides an overview of recent research activities of the 5G AgiLe and fLexible integration of SaTellite And cellulaR (5G-ALLSTAR) project which aims to develop Multi-Connectivity technology that integrates the cellular and satellite accesses to provide seamless, reliable and ubiquitous broadband services. 5G-ALLSTAR also entails developing millimeter-wave (mmWave) 5G New Radio (NR)-based cellular access system and investigating the feasibility of NR-based satellite access for providing broadband and reliable 5G services. In addition, spectrum sharing between the cellular and satellite access is studied. With all these technologies developed in the project, the 5G-ALLSTAR will showcase the first fully integrated satellite/cellular prototype system for 5G and beyond 5G (B5G) services at a big event (e.g., sporting event like Roland-Garros) in 2021. This paper also provides a preliminary techno-economic analysis on potential use cases targeting vertical markets, and introduces recent standardization activities of relevance.

This paper examines the role of multimodal rhetoric in processes of theorization. Empirically, we investigated the theorization process of a highly disruptive innovation in the history of architecture: reinforced concrete. Relying on archival data from a prominent French architectural journal in the period from 1885 to 1939, we studied the rhetorical modes at play in the theorization of reinforced concrete. First, we found that theorization entailed two recursive activities: dramatization and evaluation. While dramatization relies on both verbal and visual (i.e. multimodal) means, evaluation relies on verbal means. We integrated these components into a dynamic model of theorization that explains how visual discourse contributes to theorization beyond the effects of verbal discourse.

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