Funktionalanalyse versus Trendanalyse zur Absch?tzung anthropogener Einflüsse auf Grundwasserganglinien

The European Water Framework Directive recommends investigating trends in groundwater head time series by means of trend analysis in order to assess possible harmful anthropogenic impacts. This approach encounters substantial problems. Usually the Mann-Kendall test is applied which does not consider interactions between trends and auto-correlation in the data. These are very common in groundwater head time series. As a consequence, trend significance has been substantially overestimated. In addition, significance, magnitude and trend sign depend strongly on the selected time span. A functional analysis based on a principal component analysis of groundwater head time series was introduced as an alternative. It yielded very robust results, independent from the selected periods. To determine anthropogenic impacts on groundwater heads, deviations of observed data from the expected behaviour could be investigated. Data requirements and the computational effort of this approach are about the same compared to trend analysis.     

Haftungsfragen bei der überlassung von Bauarbeitern

Die überlassung von Arbeitnehmern ist ein dreipersonales Verh?ltnis, das zahlreiche Haftungsfragen aufwirft. Da in der Bauwirtschaft mit der Auftraggeberhaftung zudem eine besondere Haftungsbestimmung besteht, entstehen bei der überlassung von Bauarbeitern weitere Rechtsfragen, die sich in anderen Branchen nicht stellen.     

Toward integrated product and process life cycle planning—An environmental perspective

Life cycle engineering (LCE) is a key concept for promoting environmentally sustainable practices among manufacturing firms. A major hurdle in the implementation of LCE is the lack of a systematic and strategic method to design or plan an entire product life cycle. To address this issue, this keynote provides a framework for life cycle development and proposes the concept of life cycle planning. This paper aims to provide explicit and systematic methodologies for life cycle planning by reviewing this research area. Practical cases that employ life cycle planning are also illustrated. Finally, some research directions are suggested.     

Multipole analysis of meta-atoms

We determine the rigorously calculated scattered field of meta-atoms and decompose it into spherical harmonics with complex amplitudes. Transforming these spherical harmonics into a Cartesian base reveals all multipole moments in this coordinate system, i.e. all electric and magnetic dipole, quadrupole and any higher order moments can be completely determined. We show that these multipole moments provide a deeper understanding on how light interacts with the considered meta-atoms. After sketching the analytical framework, we investigate exemplarily two well-established meta-atoms and show the applicability of our approach.     

Model-Based Multiple Rigid Object Detection and Registration in Unstructured Range Data

We present a two-stage approach to the simultaneous detection and registration of multiple instances of industrial 3D objects in unstructured noisy range data. The first non-local processing stage takes all data into account and computes in parallel multiple localizations of the object along with rough pose estimates. The second stage computes accurate registrations for all detected object instances individually by using local optimization.