Publikationen


Suche nach „[2011]“ hat 190 Publikationen gefunden
Suchergebnis als PDF
    TC Freyung

    Zeitschriftenartikel

    R. Ketcham, Peter Hofmann, R. Marschallinger, G. Daxner-Höck

    Solid modeling of fossil small mammal teeth

    Computers & Geosciences, vol. 37, no. 9, pp. 1364-1371

    2011

    TC Freyung

    Zeitschriftenartikel

    A. Nazarkulova, Peter Hofmann, J. Strobl

    Mapping green spaces in Bishkek—how reliable can spatial analysis be?

    Remote Sensing, vol. 3, no. 6, pp. 1088-1103

    2011

    DigitalElektrotechnik und Medientechnik

    Zeitschriftenartikel

    H. Meer, A. Galis, J. Rubio-Loyola, A. Paler, A. Astorga, Andreas Fischer, J. Serrat, L. Lefevre

    Scalable Service Deployment on Software Defined Networks

    IEEE Communications Magazine, vol. 49, no. 12, pp. 84-93

    2011

    DOI: 10.1109/MCOM.2011.6094010

    Abstract anzeigen

    The network of the future will require a greater degree of service-awareness, and an optimal use of network resources. This paper presents the architectural design developed in the AutoI project for an open software-defined network infrastructure that enables the composition of fast and guaranteed services in an efficient manner and the execution of these services in an adaptive way taking into account better shared network resources provided by network virtualisation. Validation results are provided with special emphasis on service deployment scalability over virtualized network infrastructures.

    DigitalElektrotechnik und Medientechnik

    Zeitschriftenartikel

    A. Paler, Andreas Fischer

    vCPI – virtual Component Programming Interface

    Praxis der Informationsverarbeitung und Kommunikation, vol. 34, no. 3, pp. 142-143

    2011

    DOI: 10.1515/piko.2011.028

    DigitalElektrotechnik und Medientechnik

    Zeitschriftenartikel

    Hermann Meer, Andreas Fischer

    Position Paper: Secure Virtual Network Embedding

    Praxis der Informationsverarbeitung und Kommunikation, vol. 34, no. 4, pp. 190-193

    2011

    DOI: 10.1515/piko.2011.040

    Abstract anzeigen

    Network virtualization has been recognized as an important technique to overcome the perceived ossification of the current Internet. Several variations of network virtualization have already been discussed in the literature. These approaches use virtualization to partition and/or combine physical network resources into virtual network resources. An actual deployment of virtual networks then requires the network operator to perform a mapping of virtual resources onto physical resources. The question of how this mapping can be performed in an optimal way is commonly known as the Virtual Network Embedding (VNE) problem. Several algorithms to solve this problem have been proposed already. These algorithms, however, focus on optimizing the use of resources with regard to performance. Security constraints to the VNE problem have not been investigated in depth, so far.

    DigitalElektrotechnik und Medientechnik

    Zeitschriftenartikel

    H. Meer, T. Margaria, D. Schlosser, J. Padberg, V. Turau, X. Hesselbach, G. Taentzer, N. Luttenberger, Andreas Fischer, H. Hellbrück, M. Duelli, J. Botero

    ALEVIN - A Framework to Develop, Compare, and Analyze Virtual Network Embedding Algorithms

    Electronic Communications of the EASST, vol. 37, pp. 1-12

    2011

    Abstract anzeigen

    Network virtualization is recognized as an enabling technology for the Future Internet. Applying virtualization of network resources leads to the problem of mapping virtual resources to physical resources, known as “Virtual Network Embedding” (VNE). Several algorithms attempting to solve this problem have been discussed in the literature, so far. However, comparison of VNE algorithms is hard, as each algorithm focuses on different criteria. To that end, we introduce a framework to compare different algorithms according to a set of metrics, which allow to evaluate the algorithms and compute their results on a given scenario for arbitrary parameters.

    Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen

    Zeitschriftenartikel

    Michael Drexl

    Branch-and-Price and Heuristic Column Generation for the Generalized Truck-and-Trailer Routing Problem

    Journal of Quantitative Methods for Economics and Business Administration, vol. 12, pp. 5-38

    2011

    Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen

    Zeitschriftenartikel

    Michael Drexl

    Marktstudie Tourenplanungssoftware

    OR News, vol. 41, pp. 6-9

    2011

    IQWSonstige

    Buch (Monographie)

    Andreas Gegenfurtner

    Motivational influences on transfer: Dimensions and boundary conditions

    2011

    IQWSonstige

    Zeitschriftenartikel

    Andreas Gegenfurtner

    Comparing two handbooks of meta-analysis: Review of Hunter & Schmidt, Methods of Meta-Analysis: Correcting Error and Bias in Research Findings, and Borenstein, Hedges, Higgins, and Rothstein, Introduction to Meta-Analysis

    Vocations and Learning, vol. 4, no. 2, pp. 169-174

    2011

    IQWSonstige

    Zeitschriftenartikel

    Andreas Gegenfurtner, P. Kronqvist, P. Björk, L. Helle, R. Säljö, M. Nivala

    Traditional microscopy instruction versus process-oriented virtual microscopy instruction: A naturalistic experiment with control group

    Diagnostic Pathology, vol. 6, no. S1

    2011

    Abstract anzeigen

    Abstract Background Virtual microscopy is being introduced in medical education as an approach for learning how to interpret information in microscopic specimens. It is, however, far from evident how to incorporate its use into existing teaching practice. The aim of the study was to explore the consequences of introducing virtual microscopy tasks into an undergraduate pathology course in an attempt to render the instruction more process-oriented. The research questions were: 1) How is virtual microscopy perceived by students?) Does work on virtual microscopy tasks contribute to improvement in performance in microscopic pathology in comparison with attending assistant-led demonstrations only? Method During a one-week period, an experimental group completed three sets of virtual microscopy homework assignments in addition to attending demonstrations. A control group attended the demonstrations only. Performance in microscopic pathology was measured by a pre-test and a post-test. Student perceptions of regular instruction and virtual microscopy were collected one month later by administering the Inventory of Intrinsic Motivation and open-ended questions. Results The students voiced an appreciation for virtual microscopy for the purposes of the course and for self-study. As for learning gains, the results indicated that learning was speeded up in a subgroup of students consisting of conscientious high achievers. Conclusions The enriched instruction model may be suited as such for elective courses following the basic course. However, the instructional model needs further development to be suited for basic courses.

    IQWSonstige

    Zeitschriftenartikel

    Andreas Gegenfurtner

    Motivation and transfer in professional training: A meta-analysis of the moderating effects of knowledge type, instruction, and assessment conditions

    Educational Research Review, vol. 6, no. 3, pp. 153-168

    2011

    Abstract anzeigen

    This meta-analysis (148 studies, k = 197, N = 31,718) examined the relationship between motivation and transfer in professional training. For this purpose, motivation was conceptualized in the following nine dimensions: motivation to learn, motivation to transfer, pre- and post-training self-efficacy, mastery orientation, performance orientation, avoidance orientation, expectancy, and instrumentality. Population correlation estimates ranged between −0.11 and 0.52. Three moderator effects were estimated. First, correlations were higher when the training focused on declarative and self-regulatory, rather than on procedural, knowledge. Second, learner-centered environments tended to show greater numbers of positive correlations than did knowledge-centered environments. Third, when compared with external, supervisory, or peer assessment, self-assessment of transfer produced upwardly biased population estimates irrespective of the transfer criterion. These findings are discussed in terms of their implications for theories of training effectiveness and their significance for the practice of training evaluation.

    IQWSonstige

    Zeitschriftenartikel

    Andreas Gegenfurtner, E. Lehtinen, R. Säljö

    Expertise differences in the comprehension of visualizations: A meta-analysis of eye-tracking research in professional domains

    Educational Psychology Review, vol. 23, no. 4, pp. 523-552

    2011

    Abstract anzeigen

    This meta-analysis integrates 296 effect sizes reported in eye-tracking research on expertise differences in the comprehension of visualizations. Three theories were evaluated: Ericsson and Kintsch’s (Psychol Rev 102:211–245, 1995) theory of long-term working memory, Haider and Frensch’s (J Exp Psychol Learn Mem Cognit 25:172–190, 1999) information-reduction hypothesis, and the holistic model of image perception of Kundel et al. (Radiology 242:396–402, 2007). Eye movement and performance data were cumulated from 819 experts, 187 intermediates, and 893 novices. In support of the evaluated theories, experts, when compared with non-experts, had shorter fixation durations, more fixations on task-relevant areas, and fewer fixations on task-redundant areas; experts also had longer saccades and shorter times to first fixate relevant information, owing to superiority in parafoveal processing and selective attention allocation. Eye movements, reaction time, and performance accuracy were moderated by characteristics of visualization (dynamics, realism, dimensionality, modality, and text annotation), task (complexity, time-on-task, and task control), and domain (sports, medicine, transportation, other). These findings are discussed in terms of their implications for theories of visual expertise in professional domains and their significance for the design of learning environments.

    Maschinenbau und Mechatronik

    Zeitschriftenartikel

    Simone Walker-Hertkorn, M. Kübert, D. Schreyer, E. Eyth

    Nahwärmeversorgungskonzept in Kombination mit einem Erdwärmesondenfeld für das Baugebiet „Sonnenberg“ in Ludwigsburg

    bbr - Fachmagazin für Brunnen- und Leitungsbau (Sonderausgabe Oberflächennahe Geothermie), vol. 62

    2011

    TC Grafenau

    Zeitschriftenartikel

    A. Christmann, Robert Hable

    On Qualitative Robustness of Support Vector Machines

    Journal of Multivariate Analysis, vol. 102, no. 6, pp. 993-1007

    2011

    DOI: 10.1016/j.jmva.2011.01.009

    Abstract anzeigen

    Support vector machines (SVMs) have attracted much attention in theoretical and in applied statistics. The main topics of recent interest are consistency, learning rates and robustness. We address the open problem whether SVMs are qualitatively robust. Our results show that SVMs are qualitatively robust for any fixed regularization parameter λλ. However, under extremely mild conditions on the SVM, it turns out that SVMs are not qualitatively robust any more for any null sequence λnλn, which are the classical sequences needed to obtain universal consistency. This lack of qualitative robustness is of a rather theoretical nature because we show that, in any case, SVMs fulfill a finite sample qualitative robustness property. For a fixed regularization parameter, SVMs can be represented by a functional on the set of all probability measures. Qualitative robustness is proven by showing that this functional is continuous with respect to the topology generated by weak convergence of probability measures. Combined with the existence and uniqueness of SVMs, our results show that SVMs are the solutions of a well-posed mathematical problem in Hadamard’s sense.

    Elektrotechnik und Medientechnik

    Beitrag (Sammelband oder Tagungsband)

    László Juhász, J. Maas

    Adaptive Regelung für piezoelektrisch-basierte Hybridsysteme

    Konferenzband der SPS/IPC/Drives 2011 (Nürnberg)

    2011

    Elektrotechnik und Medientechnik

    Zeitschriftenartikel

    László Juhász, J. Maas

    FPGA-Based Control of Piezoelectric Actuators

    Serbian Journal of Electrical Engineering, vol. 8, no. Mai (2), pp. 181-201

    2011

    DOI: 10.2298/SJEE1102181J

    Elektrotechnik und Medientechnik

    Zeitschriftenartikel

    László Juhász, J. Maas, B. Borovac

    Parameter identifications and hysteresis compensation of embedded piezoelectric stack actuators

    Mechatronics, vol. 21, no. Februar (1), pp. 329-338

    2011

    DOI: 10.1016/j.mechatronics.2010.12.006

    Abstract anzeigen

    A novel method for the identification of embedded piezoelectric stack actuator parameters in combination with a real-time capable hysteresis compensation measure is presented. The presented algorithms are based on the Maxwell resistive capacitor model and are particularly useful for the identification of piezoelectric actuators embedded in a high-precision micropositioning system where the disassembly of the complete system for separate actuator identification is not recommended or not possible. The parameter identification can be performed in a fully automated way and enables the adaptation of the compensation routine to the changed circumstances (temperature difference, wearing of actuators) as well. The hysteresis compensation method proposed here does not require significant CPU or memory resources. It can be implemented as an additional task on the already existing controller or a low-budget FPGA. As an example, the proposed method was validated experimentally by the parameter identification and hysteresis compensation of the piezoelectric actuators incorporated in a commercially available hybrid micropositioning system. The achieved experimental results are in very good agreement with the theoretical ones.

    Angewandte Wirtschaftswissenschaften

    Buch (Monographie)

    Ralf Alefs, J. Gewinnus

    Ertragsteuern 2011

    Fragen und Antworten zur Einkommen-, Körperschaft- und Gewerbesteuer der Unternehmen

    2011