Octet error probability analysis of ADSL–DMT codewords

This paper presents an analytical investigation of the octet error probability of ADSL codewords under the impact of white Gaussian noise. It is shown that the assumption of independent bit errors which can be found in the literature is invalid in this case. Instead, as a novel method, bitgroups from DMT subcarriers contributing to a particular octet are analyzed. Typical bitgroup types are discussed with regard to their error probability. Finally, proposals for applying these results in optimized system solutions are derived.     

德国普福尔茨海姆平面设计学院

传达学院是一所设立了不同设计学科的私立院校，侧重于平面设计、产品设计和信息设计。传达学院在德国南部巴登-符腾堡州的不同城市都有分校，诸如斯图加特、曼海姆、乌尔姆，普福尔茨海姆等。     

Application and modelling of hybrid stereolithography injection mould tooling

The use of stereolithography (SL) to make injection moulding tools has been shown previously to be an efficient way of producing rapid tools for simple geometries, aiming at small lot sizes with an acceptable degree of accuracy. This paper highlights the unexplored potential of using SL inserts in hybrid tools using practical experiments and FEA mould filling models. The practical experiments reveal problems incurred by uneven flow as a result of differential thermal conductivity between dissimilar mould materials in a hybrid tool. The FEA flow models confirm that this uneven flow would be anticipated when using finite element analysis (FEA) software. A further FEA stress analysis predicts that catastrophic mould failure will be expected under some conditions and these reflect the results found in the practical experiments. The use of a homogeneous SL tool eliminates the issues caused by uneven mould filling but results in thermal distortion of the female mould. Ultimately, a SL tool backfilled with low melt point alloy provides a solution that eliminates the problems of uneven filling and thermal distortion.     

Gezielte Manipulation von Mikropartikeln in einem Plasma. Manipulation of micro‐disperse particles in a process plasma

An optimal treatment (surface modification, coating) of micro‐disperse materials (powder, granulate, fibres etc.) by a process plasma requires the understanding of plasma‐particle interaction. For this purpose, related experimental investigations in a novel set‐up PULVA‐INP will be presented.     

Heuristische Erlösprognosen für die Bewertung von Geschäftsmodellen im Application Service Providing

Several problems complicate the assessment of enterprises that cooperate with other firms in developing and distributing bundled goods. Revenue forecasts are particularly challenging. Cooperating suppliers must estimate and model future prices and sales volumes. They have to agree on a ratio of distribution for jointly generated revenues. Furthermore, they must compare different value chain configurations and assess consequences for the distribution of revenues. We propose a heuristic method that helps to forecast revenues for bundled goods. We demonstrate the heuristic method with the example of Application Service Providing.