234 research outputs found
Right of rescission of the author gem. 137 1 Abs. 1 UrhG in practice
No full textAs part of the reform of the German Copyright Act (UrhG) Section 1371 deals with a transitional measure for new types of publication. In particular it allows publishers to make use of online publishing without previous license agreements with copyright holders. However, a copyright holder can prohibit such forms of publication through a formal declaration within one year of the law's enactment. This paper deals with the right to revoke permission and discusses several specific instances in order to show whether, and to what extent, the exercise of this legal right actually safeguards the interests of copyright holders
A Method for learning a Fault Detection Model from Component Communication Data in Robotic Systems
No full textGolombek R, Wrede S, Hanheide M, Heckmann M. A Method for learning a Fault Detection Model from Component Communication Data in Robotic Systems. In: Seventh IARP Workshop on Technical Challenges for Dependable Robots in Human Environments. 2010: 9-14
On the Relationship between Filter Spaces and Equilogical Spaces
No full textIt was already known that the category of T 0 topological spaces is not itself cartesian closed, but can be embedded into the cartesian closed categories FIL of filter spaces and EQU of equilogical spaces where the latter embeds into the cartesian closed category ASSM of assemblies over algebraic lattices. Here, we first clarify the notion of filter space---there are at least three versions FIL a ' FIL b ' FIL c in the literature. We establish adjunctions between FIL a and ASSM and between FIL c and ASSM, and show that FIL b and FIL c are equivalent to reflective full subcategories of ASSM. The corresponding categories FIL b 0 and FIL c 0 of T 0 spaces are equivalent to full subcategories of EQU. Keywords: Categorical models and logics, domain theory and applications Author's address: Reinhold Heckmann, FB 14 -- Informatik, Universitat des Saarlandes, Postfach 151150, D-66041 Saarbrucken, Germany Phone: +49 681 302 2454 Fax: +49 681 302 3065 e-mail: [email protected]..
Multi-temporal analysis of morphological changes in an Alpine proglacial area and their effect on sediment transfer
No full textProglacial areas in high-mountain environments are among the most dynamic landscape zones in terms of morphological, sedimentological, and hydrological changes. In fact, in such areas both glacial and paraglacial dynamics exert a strong control on water fluxes (and thus on bedload transport capacity) and on sediment supply. Because of the rapid changes undergoing in these environments, the understanding of the dynamics of sediment transfer and the prediction of how this will change in future still remain a challenge. In this study, we used four different high-resolution topographic surveys to quantitatively analyse the spatio-temporal patterns of sediment transport that occurred in the proglacial area of the Sulden glacier (South Tirol, Italy). The topographic surveys covered the period 2013–2019 and – by building DEMs of difference (DoDs) – we calculated the volumes of erosion and deposition occurring at the glacier terminus and along its outflow channels. Our results indicate that, within the analysed time-period and for different areas, erosion and deposition generally show similar values, suggesting that the analysed proglacial areas has been acting both as a sediment trap and as a sediment source for the downstream river reaches. In addition, the results indicate a complex morphological dynamics, which have strongly impacted coarse sediment connectivity in the upper catchment. In particular, high temperatures and the recent and rapid glacier melt, have promoted a direct control on the structural connectivity within the proglacial area. Morphological changes have increased or decreased sediment connectivity depending on pre-existing morphological features. In contrast, extreme precipitation events, both in term of rainfall and snowfall, have locally and temporally increased the functional connectivity, sometimes leading to long-term modifications in the proglacial area. Overall, in the analysed time-period sediment transfer has been extremely dynamic, suggesting that sediment in the downstream river channel may have been supplied with irregular pulses associated with the morphological changes taking place in the proglacial area
Learning a Probabilistic Error Detection Model for Robotic Systems
No full textGolombek R, Wrede S, Hanheide M, Heckmann M. Learning a Probabilistic Error Detection Model for Robotic Systems. In: IEEE/RSJ International Conference on Intelligent Robots and Systems. 2010: 2745-2750.In order to address the problem of failure detection in the robotics domain, we present in this contribution an error detection model, based on the system’s internal data exchange and the inherent dynamics of inter-component communication. The model is strongly data driven and provides an anomaly detector for robotics systems both applicable in-situ at runtime as well as a-posteriori in post-mortem analysis. Current architectures or methods for failure detection in autonomous robots are either implementations of watch dog concepts or are based on excessive amounts of domain-specific error detection code. The approach presented in this contribution provides an avenue for the detection of more subtle anomalies originating from external sources such as the environment itself or system failures such as resource starvation. Additionally, developers are alleviated from explicitly modeling and foreseeing every exceptional situation, instead training the presented probabilistic model with the known normal modes within the specification of the robot system. As we developed and evaluated the self-awareness model on a mobile robot platform featuring an event-driven software architecture, the presented method can easily be applied in other current robotics software architectures
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