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Abstract
This paper first summarizes two central debates in the field of social scientific Internet research, namely the debate about the so-called 'social impact of Internet use' and the debate about the existence of community on the Internet. Early research discussed whether building up a community on the Internet was possible and what the effects of the use of the Internet were for its user. Recent research on the social consequences of Internet use suggests that 'the' Internet should no longer be regarded as a constant that has uniform effects for its users. Rather, the consequences of its use depend on a number of contextual conditions . The paper presents some theories that explain which conditions and features of online groups facilitate the finding of solutions to bilateral or group-level problems of cooperation.

Internet Policy in China: A Field Study of Internet Cafés reports the results of a multi-layered study of the Internet café phenomenon in the People's Republic of China. Helen Sun investigates how the Internet has been used by the state and individuals, as well as the implications of Chinese Internet policies and regulations

Teenagers have sex. While almost all parents understand that many teenagers are sexually active, there is a paradox in many parents' thinking: they insist their own teen children are not sexual, but characterize their children's peers as sexually-driven and hypersexual. Rather than accuse parents of being in denial, Sinikka Elliott teases out the complex dynamics behind this thinking, demonstrating that it is rooted in fears and anxieties about being a good parent, the risks of teen sexual activity, and teenagers' future economic and social status. Parents--like most Americans--equate teen sex.

La Internet de las Cosas está avanzando lentamente debido a la falta de confianza en dispositivos que puedan interactuar de manera autónoma. Además, se requieren nuevos enfoques para mitigar o al menos paliar ataques de atacantes omnipresentes cada vez más poderosos. Para hacer frente a estas cuestiones, esta tesis investiga los conceptos de identidad y autenticidad. En cuanto a la identidad, se propone un novedoso enfoque sensible al contexto basado en la tecnología de cadenas de bloques donde el paradigma estándar se sustituye por un enfoque basado en la identificación de atributos. Referente a la authentication, nuevas propuestas permiten validar mensajes en escenarios en línea y fuera de línea. Además, se introduce un nuevo enfoque basado en software para escenarios en línea que proporciona propiedades intrínsecas de hardware independientemente de elementos físicos. Por último, la tecnología PUF permite el diseño novel de protocolos de autenticación en escenarios donde sin conexión. ; The Internet of Things is advancing slowly due to the lack of trust in devices that can autonomously interact. Standard solutions and new technologies have strengthened its security, but ubiquitous and powerful attackers are still an open problem that requires novel approaches. To address the above issues, this thesis investigates the concepts of identity and authenticity. As regards identity, a new context-aware and self-enforced approach based on the blockchain technology is proposed. With this solution, the standard paradigm focused on fixed identifiers is replaced with an attribute-based identification approach that delineates democratically approved names. With respect to authentication, new approaches are analyzed from both the online and offline perspective to enable smart things in the validation of exchanged messages. Further, a new software approach for online scenarios is introduced which provides hardware-intrinsic properties without relying on any physical element. Finally, PUF technology is leveraged to design ...

Welchen Beitrag kann Kunst mittels Beteiligung durch »die Anderen« in einer vernetzten Realität leisten und was hat dies mit Wissen oder Nicht-Wissen zu tun? An der Schnittstelle von Kunsttheorie, Kulturwissenschaft, Medienwissenschaft und Technologiegeschichte untersucht Manuela Naveau das Wesen von partizipativer Kunst im Internet. Dabei führt sie in die Welt computergestützter Partizipationsmodelle ein und reflektiert Begrifflichkeiten wie Masse und Crowd, Publikum und »die Anderen«. Im Besonderen geht sie auf verschiedene Formen von unwissentlicher und unfreiwilliger Teilnahme ein und regt zu einer dringend notwendigen Diskussion um die Entwicklung wirksamer Gestaltungsoptionen in einer Zeit enorm schnell fortschreitender Digitalisierungs- und Transformierungsprozesse an.