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Steinau an der Strasse, Germany

Schott D.,UniveWismar University of Applied Sciences
World Transactions on Engineering and Technology Education | Year: 2014

Context-dependent or incomplete statements often occur in everyday life. Many people use them intuitively without thinking about the possible consequences. Unfortunately, such statements can cause misunderstanding or even manipulate people. Some examples are mentioned in this article. Therefore, it is important to explain the context in a very responsible manner considering also the pre-knowledge of the audience. In mathematics and mathematically based sciences, incomplete concepts, models, assumptions, statements, and so on, can lead to contradictions and in applications to disastrous consequences. This article illustrates this by instructive examples. Hence, engineering students should learn to think logically, mathematically and rationally. As an important side effect of this basic science education, they should be able to discover weaknesses and contradictions in argumentation or to expose manipulation, half-truths and swindle in professional and everyday life. © 2014 WIETE. Source

Mallwitz K.,UniveWismar University of Applied Sciences
World Transactions on Engineering and Technology Education | Year: 2013

This article presents developments and concepts in dual study courses in civil engineering education and the first findings and conclusions. Presented is an overview of dual study courses in Germany with special emphasis on civil engineering. Dual study courses in the German higher education context are illustrated, classified and explained. All in all, alumni of dual study courses stand a chance, whereas the chances of success for universities of applied sciences appear to be less in order to provide a homogeneous basis for advanced studies. In order to maintain the education at the highest level, quality assurance for both universities of applied sciences and universities is proposed. © 2013 WIETE. Source

Moller S.,University of Limerick | Newe T.,University of Limerick | Lochmann S.,UniveWismar University of Applied Sciences
Sensors and Actuators, A: Physical | Year: 2012

Many medical applications set new demands on sensor network designs. They often involve highly variable data rates, multiple receivers and security. Most existing sensor network designs do not adequately support these requirements, focusing instead on aggregating small amounts of data from nodes without security. In this paper, we present a software design for medical sensor networks. This framework provides a set of protocols and services specifically tailored for this application domain. It includes a secure communications model, an interface for periodic collection of sensor data, a dynamic sensor discovery protocol and protocols that monitor and save up to 70% of the energy of a node. The framework is built in TinyOS and a JAVA based user interface is provided to debug the framework and display the measured data. An extensive evaluation of the framework of a 6-node sensor test-bed is presented, measuring scalability and robustness as the number of sensors and the per node data rate are varied. The results show that the proposed framework is a scalable, robust, reliable and secure solution for medical applications. © 2011 Elsevier B.V. All rights reserved. Source

Current Speech Dialogue Systems do not seem to have a good reputation. But what are the reasons?Which characteristics make dialogue systems more natural? Important features include adaptivity, mixed initiative, means for correction and over-answering, robust speech recognition, interpretation of colloquial language, negations and references as well as a basic social behaviour. When comparing current systems, we discover that many of these features have not been implemented yet. One main reason is the missing of a comprehensive dialogue modelling and implementation tool. At the same time, there may exist a certain discrepancy between industry and science.While industry claims that it does not need more natural systems, scientists focus on isolated problems in a very detailed way that is often not directly adaptable for industrial usage. Our aim should be the joint development of an overall model in the context of applied sciences. © Springer-Verlag 2012. Source

Ahrens A.,UniveWismar University of Applied Sciences | Benavente-Peces C.,Technical University of Madrid
WINSYS 2010 - Proceedings of the International Conference on Wireless Information Networks and Systems | Year: 2010

In this contribution we jointly optimize the number of multiple-input multiple-output (MIMO) layers and the number of bits per symbol within an iteratively-detected multiuser MIMO downlink (DL) transmission scheme under the constraint of a given fixed data throughput and integrity. Instead of treating all the users jointly as in zero-forcing (ZF) multiuser transmission techniques, the investigated singular value decomposition (SVD) assisted DL multiuser MIMO system takes the individual user's channel characteristics into account. In analogy to bit-interleaved coded irregular modulation, we introduce a MIMO-BICM scheme, where different user-specific signal constellations and mapping arrangement were used within a single codeword. Extrinsic information transfer (EXIT) charts are used for analyzing and optimizing the convergence behaviour of the iterative demapping and decoding. Our results show that in order to achieve the best bit-error rate, not necessarily all user-specific MIMO layers have to be activated. Source

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