A dissertation at Linköping University in Sweden presents a program that runs on telephones and can deliver messages even when the infrastructure for telecommunication has been knocked out.
Natural disasters in recent years have shown how vulnerable our society is to unforeseen and disruptive events. At the same time we have seen that there is a strong will to help people in crisis areas. But for rescue operations to work, telecommunications need to be up and running.
Mobile telephone base stations and satellite telephones are of major importance, but they have their limitations in terms of cost, construction time, and access on a large scale. Mikael Asplund, a doctoral candidate in computer science, is now presenting, among other things, a complement to existing communication channels in a crisis.
The idea is to use the new generation of mobile phones to send messages directly from one phone to another. The advantage of this type of spontaneous network is that it can be used by everyone, without any special equipment, and it can be set up virtually instantly to solve problems that arise in a specific place.
But such networks bring not only great potential but also challenges, as gaps and network partitions can arise, so that nobody can forward a message. At the same time the use of batteries necessitates great energy efficiency. Mikael Asplund and his associates have designed a program that overcomes these difficulties when it is run on telephones, making it possible to deliver messages under extremely severe conditions.
The first part of the dissertation also deals with network partitions in a more controlled environment. This problem can arise, for example, when an Internet bank experiences disruptions in its network connection to other parts of the bank. The dissertation presents a method for the bank to continue to provide service to its customers despite such breakdowns.
The dissertation Disconnected discoveries: Availability studies in partitioned networks is published by LiU Electronic Press
Contact: Mikael Asplund +46 (0)13-282668, +46 (0)707-481462, email@example.com
Pressofficer Åke Hjelm; firstname.lastname@example.org; +46-13 281 395
Åke Hjelm | idw
Ultra-precise chip-scale sensor detects unprecedentedly small changes at the nanoscale
18.01.2017 | The Hebrew University of Jerusalem
Data analysis optimizes cyber-physical systems in telecommunications and building automation
18.01.2017 | Fraunhofer-Institut für Algorithmen und Wissenschaftliches Rechnen SCAI
An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...
Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...
Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...
Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales
Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...
Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.
As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...
19.01.2017 | Event News
10.01.2017 | Event News
09.01.2017 | Event News
20.01.2017 | Awards Funding
20.01.2017 | Materials Sciences
20.01.2017 | Life Sciences