Social Media plays an increasingly important role in humanitarian and disaster response
scenarios. However, typical social media applications rely on internet connectivity, and as a …

In emergency scenarios such as earthquakes, fires, avalanches, or building collapses, it is
necessary to discover people trapped under debris or anyway hidden from eyesight. In this …

Human activity patterns such as communication and cooperation rely in large parts on
smartphone-based interaction. Day-to-day available communication means are taken for …

Multimedia delivery systems and protocols usually assume end-to-end connections and low
delivery delays between multimedia sources and consumers. However, neither of these two …

Context-aware applications oftentimes require devices to share a user's context in order to
provide them with relevant information and services. However, current context-sharing …

In many scenarios, Internet connectivity may not be available. In such situations, device-to-
device (D2D) communication may be utilized to establish a peer-to-peer (P2P) network …

Mit der fortschreitenden Verankerung (autonomer) digitaler Systeme im alltäglichen Leben
nehmen diese zunehmend Einfluss auf Entscheidungen, Gesetzgebung, Verhalten und …

This study introduces Oppline, an ad hoc opportunistic short message service that can be
collaboratively used by everyone who has a smart mobile device. The data exchange …

Modern society is surrounded by an ample spectrum of smart mobile devices. This ubiquity
forms a high potential for community-oriented opportunistic ad hoc networking applications …

Super cyclone Amphan in May 2020, left the city of Kolkata without cellphone connectivity for
hours, and without Internet connectivity for days. Rural areas were much worse affected …