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Heimböckel, Dieter UL

Article for general public (2012)

Detailed reference viewed: 39 (2 UL)
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See detailU-Lab: an out-of-the-box solution for any usability problem? A presentation on methodological and practical issues
Koenig, Vincent UL; van de Leemput, Cécile

Scientific Conference (2005)

Detailed reference viewed: 20 (0 UL)
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See detailUAS see-and-avoid strategy using a fuzzy logic controller optimized by Cross-Entropy in Scaling Factors and Membership Functions
Fu, Changhong; Olivares Mendez, Miguel Angel UL; Campoy, P. et al

in Unmanned Aircraft Systems (ICUAS), 2013 International Conference on (2013)

This work aims to develop a novel Cross-Entropy (CE) optimization-based fuzzy controller for Unmanned Aerial Monocular Vision-IMU System (UAMVIS) to solve the seeand-avoid problem using its accurate ... [more ▼]

This work aims to develop a novel Cross-Entropy (CE) optimization-based fuzzy controller for Unmanned Aerial Monocular Vision-IMU System (UAMVIS) to solve the seeand-avoid problem using its accurate autonomous localization information. The function of this fuzzy controller is regulating the heading of this system to avoid the obstacle, e.g. wall. In the Matlab Simulink-based training stages, the Scaling Factor (SF) is adjusted according to the specified task firstly, and then the Membership Function (MF) is tuned based on the optimized Scaling Factor to further improve the collison avoidance performance. After obtained the optimal SF and MF, 64% of rules has been reduced (from 125 rules to 45 rules), and a large number of real flight tests with a quadcopter have been done. The experimental results show that this approach precisely navigates the system to avoid the obstacle. To our best knowledge, this is the first work to present the optimized fuzzy controller for UAMVIS using Cross-Entropy method in Scaling Factors and Membership Functions optimization. [less ▲]

Detailed reference viewed: 59 (8 UL)
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See detailUAS See-and-Avoid using two different approaches of Fuzzy Control
Olivares Mendez, Miguel Angel UL; Mejias, Luis; Campoy, Pascual et al

in 2012 International Conference on Unmanned Aircraft Systems (ICUAS'12) (2012)

This work presents two UAS See and Avoid approaches using Fuzzy Control. We compare the performance of each controller when a Cross-Entropy method is applied to optimase the parameters for one of the ... [more ▼]

This work presents two UAS See and Avoid approaches using Fuzzy Control. We compare the performance of each controller when a Cross-Entropy method is applied to optimase the parameters for one of the controllers. Each controller receive information from an image processing frontend that detect and track targets in the environment. Visual information is then used under a visual servoing approach to perform autonomous avoidance. Experimental flight trials using a small quadrotor were performed to validate and compare the behaviour of both controllers. [less ▲]

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See detailUAV degradation identification for pilot notification using machine learning techniques
Manukyan, Anush UL; Olivares Mendez, Miguel Angel UL; Bissyande, Tegawendé François D Assise UL et al

in Proceedings of 21st IEEE International Conference on Emerging Technologies and Factory Automation ETFA 2016 (2016, September 06)

Unmanned Aerial Vehicles are currently investigated as an important sub-domain of robotics, a fast growing and truly multidisciplinary research field. UAVs are increasingly deployed in real-world settings ... [more ▼]

Unmanned Aerial Vehicles are currently investigated as an important sub-domain of robotics, a fast growing and truly multidisciplinary research field. UAVs are increasingly deployed in real-world settings for missions in dangerous environments or in environments which are challenging to access. Combined with autonomous flying capabilities, many new possibilities, but also challenges, open up. To overcome the challenge of early identification of degradation, machine learning based on flight features is a promising direction. Existing approaches build classifiers that consider their features to be correlated. This prevents a fine-grained detection of degradation for the different hardware components. This work presents an approach where the data is considered uncorrelated and, using machine learning techniques, allows the precise identification of UAV’s damages. [less ▲]

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See detailUAV degradation identification for pilot notification using machine learning techniques
Manukyan, Anush UL; Olivares Mendez, Miguel Angel UL; Bissyande, Tegawendé François D Assise UL et al

in IEEE 21st International Conference on Emerging Technologies and Factory Automation (ETFA), Berlin, Germany, 2016 (2016, September)

Unmanned Aerial Vehicles are currently investigated as an important sub-domain of robotics, a fast growing and truly multidisciplinary research field. UAVs are increasingly deployed in real-world settings ... [more ▼]

Unmanned Aerial Vehicles are currently investigated as an important sub-domain of robotics, a fast growing and truly multidisciplinary research field. UAVs are increasingly deployed in real-world settings for missions in dangerous environments or in environments which are challenging to access. Combined with autonomous flying capabilities, many new possibilities, but also challenges, open up. To overcome the challenge of early identification of degradation, machine learning based on flight features is a promising direction. Existing approaches build classifiers that consider their features to be correlated. This prevents a fine-grained detection of degradation for the different hardware components. This work presents an approach where the data is considered uncorrelated and, using machine learning techniques, allows the precise identification of UAV’s damages. [less ▲]

Detailed reference viewed: 18 (12 UL)
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See detailUAV fleet area coverage with network connectivity constraint
Schleich, Julien UL; Panchapakesan, Athithyaa; Danoy, Grégoire UL et al

in Proceedings of the 11th ACM International Symposium on Mobility Management and Wireless Access (MobiWac'13) (2013)

Detailed reference viewed: 77 (3 UL)
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See detailUAV Fleet Mobility Model with Multiple Pheromones for Tracking Moving Observation Targets
Atten, Christophe UL; Chanouf, Loubna; Danoy, Grégoire UL et al

in 19th European Conference on Applications of Evolutionary Computation (EvoApplications) (2016)

Detailed reference viewed: 82 (6 UL)
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See detailUAV Multilevel Swarms for Situation Management
Rosalie, Martin UL; Danoy, Grégoire UL; Bouvry, Pascal UL et al

in Proceedings of the 2Nd Workshop on Micro Aerial Vehicle Networks, Systems, and Applications for Civilian Use (2016)

The development and usage of Unmanned Aerial Vehicles (UAVs) quickly increased in the last decades, mainly for military purposes. Nowadays, this type of technology is used in non-military contexts mainly ... [more ▼]

The development and usage of Unmanned Aerial Vehicles (UAVs) quickly increased in the last decades, mainly for military purposes. Nowadays, this type of technology is used in non-military contexts mainly for civil and environment protection: search & rescue teams, fire fighters, police officers, environmental scientific studies, etc. Although the technology for operating a single UAV is now mature, additional efforts are still necessary for using UAVs in fleets (or swarms). This position paper presents the ASIMUT project (Aid to SItuation Management based on MUltimodal, MUltiUAVs, MUltilevel acquisition Techniques). The challenges of this project consist of handling several fleets of UAVs (swarms) including communication, networking and positioning aspects. This motivates the development of novel multilevel cooperation algorithms which is an area that has not been widely explored, especially when autonomy is an additional challenge. Moreover, we will provide techniques to optimize communications for multilevel swarms. Finally, we will develop distributed and localized mobility management algorithms that will cope with conflicting objectives such as connectivity maintenance and geographical area coverage. [less ▲]

Detailed reference viewed: 100 (12 UL)
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See detailÜber das Gesetz: Zur juristischen Form bei Handke
Kohns, Oliver UL

in Gegenwartsliteratur : ein germanistisches Jahrbuch = a German studies yearbook (2013), 12

Der Beitrag fragt nach der Bedeutung von Begriffen wie »Gesetz« und »Gerechtigkeit« in den Texten Handkes. Eine schillernde Bedeutungsfülle nimmt das Konzept des »Gesetzes« an, es verweist aber zentral – ... [more ▼]

Der Beitrag fragt nach der Bedeutung von Begriffen wie »Gesetz« und »Gerechtigkeit« in den Texten Handkes. Eine schillernde Bedeutungsfülle nimmt das Konzept des »Gesetzes« an, es verweist aber zentral – wie im Vergleich mit Stifters »sanftem Gesetz« gezeigt werden soll – auf eine ästhetische Vorstellung von Gerechtigkeit (in der Wahrnehmung und Beschreibung der Wirklichkeit). Die Lektüre von Die Stunde der wahren Empfindung (1975) und Die Wiederholung (1986) soll zeigen, dass diese Vorstellung von Gerechtigkeit – als Suche nach dem Gesetz – auch die narrative Struktur von Handkes Texten prägen kann. Die »Serbien«-Texte Handkes zeigen schließlich, dass auch die explizit politischen Interventionen des Autors im Kontext der poetologischen Vorstellung von Gesetz und Gerechtigkeit verstanden werden müssen. [less ▲]

Detailed reference viewed: 82 (11 UL)
See detailÜber das Verhältnis von Identität, Sprache und Mehrsprachigkeit – mit einigen Anmerkungen zur Situation in Luxemburg
Hu, Adelheid UL

in Burwitz-Melzer, Eva; Königs, Frank; Riemer, Claudia (Eds.) Identität und Fremdsprachenlernen. Anmerkungen zu einer komplexen Beziehung. Arbeitspapiere der 33.Frühjahrskonferenz zur Erforschung der Fremdsprachenunterrichts (2013)

Detailed reference viewed: 173 (12 UL)
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See detailÜber den Einsatz eines Windschutzes bei gravimetrischen Messungen
Weigelt, Matthias UL; Schlesinger, R.

Scientific Conference (2010, October)

Detailed reference viewed: 10 (0 UL)
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See detailÜber den Zusammenhang zwischen dem physischen Selbstkonzept, der Bezugsnormorientierung und der Zielorientierung bei Grundschulkindern
Lohbeck, Annette; Tietjens, Maike; Bund, Andreas UL

in Wegner, Manfred; Brückner, Jan-Peter; Kratzenstein, Stefan (Eds.) Sportpsychologische Kompetenz und Verantwortung (2012, May)

Detailed reference viewed: 68 (2 UL)
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See detailÜber die Bedeutung des historischen Systemvergleichs für die Wirtschaftswissenschaften. Betrachtungen auf Makro-, Meso- und Mikroebene
Klump, Rainer UL

in Baar, L.; Petzina, D. (Eds.) Wirtschaftlicher Strukturwandel. Innovationen und regionaler Wandel im geteilten Deutschland nach 1945 (1999)

Detailed reference viewed: 15 (0 UL)
See detailÜber die Mittel des Lernens Kontextuelle Studien zum staatlichen Lehrmittelwesen im Kanton Zürich des 19. Jahrhunderts
Tröhler, Daniel UL; Oelkers, Jürgen

Book published by Pestalozzianum (2001)

Detailed reference viewed: 28 (1 UL)
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See detailÜber die normativen Implikationen des Ordoliberalismus für die moderne Wirtschaftsethik (The Ethical-Normative Implications of German Ordoliberalism)
Klump, Rainer UL; Wörsdörfer, Manuel

in Zeitschrift für Wirtschafts- und Unternehmensethik (2009)

Detailed reference viewed: 9 (0 UL)
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See detailÜber die Verschriftlichung der Erinnerung in dem Roman La mémoire de la baleine von Jean Portante
Glesener, Jeanne UL

in Grucza, Franciszek; Neuberg, Simon; Conter, Claude D. (Eds.) et al Jiddische Spache und Literatur / Luxemburgistik / Niederländische Sprach- und Literaturwissenschaft mit besonderer Berücksichtigung des Afrikaans (2012)

Detailed reference viewed: 32 (1 UL)
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See detailÜber Hannah Arendts »Kultur und Politik«
Pavlik, Jennifer UL

in Zeitschrift für Interkulturelle Germanistik (2014)

Detailed reference viewed: 23 (0 UL)