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Abstract not available.

We find effective, or homogenized, material parameters for Maxwell’s equations when the microscopic scale becomes small compared to the scale induced by the frequencies of the imposed currents. After defining a singular value decomposition of the non-selfadjoint partial differential operator, we expand the electromagnetic field in the modes corresponding to the singular values, and show that only the

In Networked Control Systems, time-varying delays and loss of data are two important problems to be taken into account. In this paper, in order to face them, the design of a predictor-observer for possible unstable systems is proposed. A delay-dependent time varying stability condition is expressed in terms of LMIs. Stability and robustness is proved.

Paper prepared for the ESTER course in research design, Münster 13-15 October 2005

Theoretically, electron microscopy and scanning probe microscopy offer information on a scale beyond the optical microscope. However, the quality of the micrograph and the obtained information is limited by the sample preparation. Each sample has its own characteristics that need special precautions, meaning that sample preparation is a continuously developing science. In this thesis several micro

In the debate on how to make democracy strong against terrorism, it has been suggested that the Western democracies need new protective measures. This paper argues that, far from protecting democracy, such measures may in fact undermine the very values and virtues that make democracy possible. Information freedom, the right to due process and the protection of privacy are all fundamental for the

The internet has had an impact on public relations that goes well beyond significant adjustments in practice made in response to technological change. Mirroring the emergence of ”Web 2.0” platforms, the discipline is increasingly articulating its purpose and culture through discourse associated with social media. Concepts such as transparency, authenticity, conversation and engagement can be inext

Consumer packaging has become increasingly important as a value adding product service system, since packages shape the consumer’s experience of product use as well as accelerating and affecting the first purchase decision. Recent research in food packaging has resulted in technological innovations that provide information on the real shelf life and expiration of food products as a service to user

In this paper the choices of control variables and control structures are investigated for the Open Plate Reactor. Since the process design is very flexible, it allows many different control structures and variables and it may be non-trivial to find the most suitable choice. Analysis with the Relative Gain Array indicates that the flexible process configuration of the OPR enables a decentrali

Ultra-wideband (UWB) communication is a potential technique for future high-speed networks. In this paper, we investigate low complexity signal detection approaches for OFDM based UWB systems. In particular, we develop practical approaches for channel estimation and interference suppression. Computer simulation results show that these techniques can be effectively used in OFDM based UWB systems fo