Alexander Fink

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Unlike in traditional approaches to parallel or distributed processing where normally well struc-tured problems are implemented completely in some programming environment we are faced with the problem of integrating existing heterogeneous software systems. Furthermore, pattern analysis stresses special aspects of communication capabilities. Therefore, we(More)
Distance estimation by the evaluation of RSSI measurements is a simple and well-known technique to predict the position of an unknown node. Therefore the infrastructure do not have to be extended by expensive hardware for synchronization or direction approximation. However, with the localization based on RSSI measurements common and proven systems can be(More)
The internal model control (IMC) scheme has been widely applied in the field of process control. So far, IMC has been mainly applied to linear processes. This paper discusses the extension of the IMC scheme to nonlinear processes based on local linear models where the properties of linear design procedures can be exploited. The IMC scheme results in(More)
Matroid polytope subdivisions and valuations Many important invariants for matroids and polymatroids are valuations (or are valuative), which is to say they satisfy certain relations imposed by subdivisions of matroid polytopes. These include the Tutte polynomial, the Billera-Jia-Reiner quasi-symmetric function, Derk-sen's invariant G, and (up to change of(More)
Social service organizations have long used data in their efforts to support people in need for the purposes of advocacy, tracking, and intervention. Increasingly, such organizations are joining forces to provide wrap-around services to clients in order to “move the needle” on intractable social problems. Groups using these strategies, called Collective(More)
Unlike in traditional approaches to parallel or distributed processing where normally well struc-tured problems are implemented completely in some programming environment we are faced with the problem of integrating existing heterogeneous software systems. Furthermore, pattern analysis stresses special aspects of communication capabilities. Therefore, we(More)
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