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Active magnetic bearings are progressively replacing conventional bearings in many industrial applications, particularly in the energy sector. Magnetic bearings have many advantages such as contactless support and clean operation; however their use also poses some challenges connected to their inherent open loop instability. Occurrence of faults in one or more components of an active magnetic bearing...
Based on new results of transmission and emission experiments on CdS single crystals in a very extended range of excitation intensities at 1.8 K, we discuss the annihilation and formation of excitonic mole cules in a model involving AΓ6-excitons and AΓ5-polaritons. It is shown that the presented results as well as those by Saito and Shionoya can be consistently explained in this model. A theoretical...
Multiple-Input Multiple-Output (MIMO) technology is ready for deployment in commercial cellular networks in the very near future. Therefore, the need of incorporating this technology into radio network planning and optimization tools rises dramatically for network operators. In this contribution we show results of the validation of advanced ray tracing simulations with channel sounding measurements...
We report on a novel approach to identify genetic variations based on the detection of specific polymerase-chain-reaction products by surface plasmon resonance. We use a recently developed, home-made spectrometer which exploits chips with integrated optics and microfluidics. The gold film at the chip surface is locally functionalized with single-stranded, thiol-modified probe DNA by applying a nanoliter...
Multiple-Input Multiple-Output (MIMO) technology is ready for deployment in the near future. A variety of MIMO antenna types including cross-polarized antennas, uniform linear arrays, and remote radio heads will be available. While theoretical MIMO performance gains have thoroughly been investigated, one of the major tasks of network operators, the selection process of an optimal MIMO antenna type...
The increasing traffic and the demand for high data rate services in WCDMA networks prompt the need for an automatic network optimization. Current state-of-the-art optimization methods adapt physical parameters, such as the antennas' tilt or azimuth. As agreed in the community, a further capacity increase can be achieved by an optimization of radio resource management (RRM) parameters. While theoretical...
The enhanced uplink (E-UL) will be ready for deployment in the very near future. Consequently, the demand of know-how on efficient resource assignment and scheduling strategies on system/network level currently strongly arises from network operators. Beside a fast retransmission mechanism (hybrid ARQ HARQ), the second key advantage of the E-UL compared with the release 99 version is the Node B resource...
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