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A graph database for sensor data receives continuous data streams from static or moving sensors. There exist many different sensor types which produce a large variety of different data measured at specific points in time. If all these data is combined, valuable information could be gained. During the talk, a conceptual implementation of a graph database for spatio-temporal sensor data is presented. This implementation is designed to support insertions and spatio-temporal queries efficiently.

24.07.2014 - 08:15 h

Monitoring of server infrastructures is a key aspect of maintaining a distributed architecture. In the talk I will explain the structure and characteristics of telemetry data that is captured by state of the art monitoring systems, and present some approaches for detecting changes or anomalies.

10.07.2014 - 08:15 h
Alex Stab

Im Rahmen des Projekt- und Forschungspraktikums "Mobile Sensors" wurde ein System zur Analyse des Radverkehrsflusses entwickelt, indem die, mit handelsüblichen Smartphones, während einer Fahrt gesammelten Sensordaten an einen Server gesendet und dort ausgewertet werden.

10.07.2014 - 08:15 h

To use RDF in a distributed fashion, data must be partitioned in an intelligent way to keep communication between storage nodes low and reduce query response times. We investigate the utilization of SPARQL query log analysis as an approximation for possible partitioning approaches.

03.07.2014 - 08:15 h

This Oberseminar talk is a test talk for our paper presentation on the ECAI 2014. We propose the Normalized Relevance Distance (NRD): a robust metric for computing semantic relatedness between terms.

26.06.2014 - 08:15 h

Microtask crowdsourcing has shown to be a successful method for engaging humans to accomplish tasks that, even simple and repetitive, cannot so effectively be carried out by fully automatic techniques. With an increasing micro-labor supply and a larger available workforce, new microtask platforms have emerged providing an extensive list of marketplaces where microtasks are offered by requesters and completed by crowd workers. One of the aspects of micro work that remains under discussion is the process of quality assurance. Besides methods to identify inappropriate actions (e.g. scammers), finding a suitable match between available microtasks and crowd workers has been acknowledged as a promising way to improve the quality of crowd work.

12.06.2014 - 08:15 h
Patrick Nitschke

Bilder und Fotos nehmen einen großen Stellenwert in den heutigen Medien und sozialen Netzwerken ein. Durch die steigende Verbreitung von aufnahmefähigen Geräten wie Smartphones und Digitalkameras gibt es kaum einen Moment, der nicht festgehalten oder dokumentiert wird. Dies erzeugt große Mengen von Bildern, die, wenn sie geordnet werden sollen,mit Annotationen bzgl. ihres Inhaltes versehen werden müssen. Der Mensch ist in dieser Disziplin weiterhin den bekannten automatisierten Verfahren weit voraus.

05.06.2014 - 08:15 h

In this talk I will give a brief overview of my past research activity and delineate my future research at WeST.

22.05.2014 - 08:15 h

We introduce a novel approach for building language models based on a systematic, recursive exploration of skip n-gram models which are interpolated using modified Kneser-Ney smoothing. Our approach generalizes language models as it contains the classical interpolation with lower order models as a special case.

22.05.2014 - 08:15 h
Damien Fay (Bournemouth University)

This talk looks at how the parameters of a complex network model may be estimated. Specifically, I examine the application of Approximate Bayes Computation as an alternative to likelihood or link based techniques.

15.05.2014 - 08:15 h