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See detailVision-Based Aircraft Pose Estimation for UAVs Autonomous Inspection without Fiducial Markers
Cazzato, Dario UL; Olivares Mendez, Miguel Angel UL; Sanchez Lopez, Jose Luis UL et al

in IECON 2019-45th Annual Conference of the IEEE Industrial Electronics Society (2019)

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See detailVision-Based Steering Control, Speed Assistance and Localization for Inner-CityVehicles
Olivares Mendez, Miguel Angel UL; Sanchez-Lopez, Jose Luis; Jimenez, Felipe et al

in Sensors (2016), 16(3), 362

Autonomous route following with road vehicles has gained popularity in the last few decades. In order to provide highly automated driver assistance systems, different types and combinations of sensors ... [more ▼]

Autonomous route following with road vehicles has gained popularity in the last few decades. In order to provide highly automated driver assistance systems, different types and combinations of sensors have been presented in the literature. However, most of these approaches apply quite sophisticated and expensive sensors, and hence, the development of a cost-efficient solution still remains a challenging problem. This work proposes the use of a single monocular camera sensor for an automatic steering control, speed assistance for the driver and localization of the vehicle on a road. Herein, we assume that the vehicle is mainly traveling along a predefined path, such as in public transport. A computer vision approach is presented to detect a line painted on the road, which defines the path to follow. Visual markers with a special design painted on the road provide information to localize the vehicle and to assist in its speed control. Furthermore, a vision-based control system, which keeps the vehicle on the predefined path under inner-city speed constraints, is also presented. Real driving tests with a commercial car on a closed circuit finally prove the applicability of the derived approach. In these tests, the car reached a maximum speed of 48 km/h and successfully traveled a distance of 7 km without the intervention of a human driver and any interruption. [less ▲]

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See detailVision/Respective on the Egyptian Constitutional Draft Articles
Al Hajjaji, Shams Al Din UL

Presentation (2012, May)

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See detailVisitatie Kunst & Cultuurwetenschappen 2012-2013: Een nabeschouwing
Fickers, Andreas UL; Verschaffel, Bart; Legêne, Susan et al

Article for general public (2014)

In de loop van het academiejaar 2012-2013 vond een visitatie plaats van de Nederlandse universitaire opleidingen in de Geesteswetenschappen, Voor de Kunst & Cultuurwetenschappen bestond de commissie uit ... [more ▼]

In de loop van het academiejaar 2012-2013 vond een visitatie plaats van de Nederlandse universitaire opleidingen in de Geesteswetenschappen, Voor de Kunst & Cultuurwetenschappen bestond de commissie uit Bart Verschaffel (Universiteit Gent) voorzitter, en de kernleden Michael Astroh (Universiteit Greifswald), Andreas Fickers (Universiteit Luxemburg), Susan Legêne (Vrije Universiteit Amsterdam), Geert Lernout (Universiteit Antwerpen), Hans Van Maanen (Universiteit Groningen), Mariët Westermann (Mellon Foundation New York). Na het neerleggen van de rapporten heeft de commissie een afsluitende beschouwing geschreven over de toestand van de kunst- en cultuuropleidingen in Nederland. [less ▲]

Detailed reference viewed: 298 (8 UL)
See detail"La Visitation. Carnets pour un roman. L'écriture en abyme de Jean Sorrente"
Raus, Tonia UL

in Conter, Claude D.; Goetzinger, Germaine (Eds.) Identitäts(de)konstruktionen. Neue Studien zur Luxemburgistik (2008)

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See detailVisual 3-D SLAM from UAVs
Artieda, Jorge; Sebastian, Jose M.; Campoy, Pascual et al

in JOURNAL OF INTELLIGENT & ROBOTIC SYSTEMS (2009), 55(4-5), 299-321

The aim of the paper is to present, test and discuss the implementation of Visual SLAM techniques to images taken from Unmanned Aerial Vehicles (UAVs) outdoors, in partially structured environments. Every ... [more ▼]

The aim of the paper is to present, test and discuss the implementation of Visual SLAM techniques to images taken from Unmanned Aerial Vehicles (UAVs) outdoors, in partially structured environments. Every issue of the whole process is discussed in order to obtain more accurate localization and mapping from UAVs flights. Firstly, the issues related to the visual features of objects in the scene, their distance to the UAV, and the related image acquisition system and their calibration are evaluated for improving the whole process. Other important, considered issues are related to the image processing techniques, such as interest point detection, the matching procedure and the scaling factor. The whole system has been tested using the COLIBRI mini UAV in partially structured environments. The results that have been obtained for localization, tested against the GPS information of the flights, show that Visual SLAM delivers reliable localization and mapping that makes it suitable for some outdoors applications when flying UAVs. [less ▲]

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See detailA visual AGV-urban car using Fuzzy control
Olivares Mendez, Miguel Angel UL; Mellado, I.; Campoy, P. et al

in Automation, Robotics and Applications (ICARA), 2011 5th International Conference on (2011)

The goal of the work described in this paper is to develop a visual line guided system for being used on-board an Autonomous Guided Vehicle (AGV) commercial car, controlling the steering and using just ... [more ▼]

The goal of the work described in this paper is to develop a visual line guided system for being used on-board an Autonomous Guided Vehicle (AGV) commercial car, controlling the steering and using just the visual information of a line painted below the car. In order to implement the control of the vehicle, a Fuzzy Logic controller has been implemented, that has to be robust against curvature changes and velocity changes. The only input information for the controller is the visual distance from the image center captured by a camera pointing downwards to the guiding line on the road, at a commercial frequency of 30Hz. The good performance of the controller has successfully been demonstrated in a real environment at urban velocities. The presented results demonstrate the capability of the Fuzzy controller to follow a circuit in urban environments without previous information about the path or any other information from additional sensors. [less ▲]

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See detailThe Visual and History Practice in the Digital Age
Allender, Tim; Dussel, Inés; Grosvenor, Ian et al

Scientific Conference (2017)

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See detailVisual and human-interpretable feedback for assisting physical activity
Goncalves Almeida Antunes, Michel UL; Baptista, Renato UL; Demisse, Girum UL et al

in European Conference on Computer Vision (ECCV) Workshop on Assistive Computer Vision and Robotics Amsterdam, (2016)

Physical activity is essential for stroke survivors for recovering some autonomy in daily life activities. Post-stroke patients are initially subject to physical therapy under the supervision of a health ... [more ▼]

Physical activity is essential for stroke survivors for recovering some autonomy in daily life activities. Post-stroke patients are initially subject to physical therapy under the supervision of a health professional, but due to economical aspects, home based rehabilitation is eventually suggested. In order to support the physical activity of stroke patients at home, this paper presents a system for guiding the user in how to properly perform certain actions and movements. This is achieved by presenting feedback in form of visual information and human-interpretable messages. The core of the proposed approach is the analysis of the motion required for aligning body-parts with respect to a template skeleton pose, and how this information can be presented to the user in form of simple recommendations. Experimental results in three datasets show the potential of the proposed framework. [less ▲]

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See detailVisual Attitude Estimation for Low-Cost Personal Remote Sensing Systems
Fromm, Tobias; Di, Long; Chen, Yangquan et al

in 7th International ASME/IEEE Conference on Mechatronics & Embedded Systems & Applications MESA 2011, Washington 28-31 August 2011 (2011, August 29)

Remote Sensing using unmanned aerial vehicles (UAV) is gathering a lot of attention at the moment by researchers and developers, especially in terms of low-cost aircrafts which still maintain sufficient ... [more ▼]

Remote Sensing using unmanned aerial vehicles (UAV) is gathering a lot of attention at the moment by researchers and developers, especially in terms of low-cost aircrafts which still maintain sufficient accuracy and performance. This paper introduces a low-cost approach to increase airworthiness by using a forward-looking camera to estimate the attitude of a UAV. It not only focuses on using machine learning to classify ground and sky, but also uses image processing and software engineering methods to make it fault-tolerant and really applicable on a miniature UAV. Additionally, it is able to interface with an autopilot framework to being used productively on flight missions. [less ▲]

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See detailVisual behavioral modelling with contracts
Amalio, Nuno UL; Kelsen, Pierre UL

Scientific Conference (2010)

This paper presents the Visual Contract Language (VCL). VCL is a new visual language for abstract software specification at level of requirements. It is designed to be visual, formal and modular, and aims ... [more ▼]

This paper presents the Visual Contract Language (VCL). VCL is a new visual language for abstract software specification at level of requirements. It is designed to be visual, formal and modular, and aims at expressing precisely structural and behavioural properties of software systems. VCL takes an approach to behavioral modelling based on design by contract that emphasises modularity. [less ▲]

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See detailVisual characterization of associative quasitrivial nondecreasing functions on finite chains
Kiss, Gergely UL

in Fuzzy Sets and Systems (in press)

Detailed reference viewed: 39 (7 UL)
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See detailA Visual Editor for Reconfigurable Object Nets based on the ECLIPSE Graphical Editor Framework
Biermann, Enrico; Ermel, Claudia; Hermann, Frank UL et al

in Juhas, G.; Desel, J. (Eds.) Proc. 14th Workshop on Algorithms and Tools for Petri Nets (AWPN'07) (2007)

The main idea behind Reconfigurable Object Nets (RONs) is the integration of transition firing and rule-based net structure transformation of place/transition nets during system simulation. RONs are high ... [more ▼]

The main idea behind Reconfigurable Object Nets (RONs) is the integration of transition firing and rule-based net structure transformation of place/transition nets during system simulation. RONs are high-level nets with two types of tokens: object nets (place/transition nets) and net transformation rules (a dedicated type of graph transformation rules). Firing of high-level transitions may involve firing of object net transitions, transporting object net tokens through the high-level net, and applying net transformation rules to object nets. Net transformations include net modifications such as merging or splitting of object nets, and net refinement. This approach increases the expressiveness of Petri nets and is especially suited to model mobile distributed processes. The paper presents a visual editor for RONs which has been developed in a student project at TU Berlin in summer 2007. The visual editor itself has been realized as a plug-in for ECLIPSE using the ECLIPSE Modeling Framework (EMF) and Graphical Editor Framework (GEF) plug-ins. [less ▲]

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See detailVisual emulation for Ethereum's virtual machine
Norvill, Robert UL; Fiz Pontiveros, Beltran UL; State, Radu UL et al

in NOMS 2018 - 2018 IEEE/IFIP Network Operations and Management Symposium (2018, July 09)

In this work we present E-EVM, a tool that emulates and visualises the execution of smart contracts on the Ethereum Virtual Machine. By working with the readily available bytecode of smart contracts we ... [more ▼]

In this work we present E-EVM, a tool that emulates and visualises the execution of smart contracts on the Ethereum Virtual Machine. By working with the readily available bytecode of smart contracts we are able to display the program's control flow graph, opcodes and stack for each step of contract execution. This tool is designed to aid the user's understanding of the Etheruem Virtual Machine as well as aid the analysis of any given smart contract. As such, it functions as both an analysis and a learning tool. It allows the user to view the code in each block of a smart contract and follow possible control flow branches. It is able to detect loops and suggest optimisation candidates. It is possible to step through a contract one opcode at a time. E-EVM achieved an average of 85.6% code coverage when tested. [less ▲]

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See detailThe Visual in Educational History: Reflections on the Practice of History in the Digital Age
Allender, Tim; Dussel, Inés; Grosvenor, Ian et al

Book published by De Gruyter (n.d.)

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See detailThe Visual in Histories of Education: A Reappraisal
Dussel, Inés; Priem, Karin UL

in Paedagogica Historica (2017), 53(6),

This introduction to the special issue on Images and Films as Objects to Think With presents a historiographical reflection on how images are being approached in the field of educational history. In ... [more ▼]

This introduction to the special issue on Images and Films as Objects to Think With presents a historiographical reflection on how images are being approached in the field of educational history. In recent years, much of the work has been situated at the intersection of visual and material studies; images are considered objects with which humans interact, carrying affects and particular materialities that condition their experience; they are taken as historical artefacts that bring out a plurality of meanings, which continue to grow with each new reading or approach. This introduction presents the articles that are included in this special issue as well as a final commentary written by Lynn Fendler that engages in a dialogue with them. The articles move away from considering the visual as a transparent source with a stable meaning, and open up different possibilities for working with and through it. They also problematise and expand the archives in which historians work; by looking at various surfaces in which images are exhibited and circulate, such as books, reports, art shows, films, magazines, and collective memories, these studies point to the “affective and effective histories” that images tell, and invite new research agendas for a visual history of education. [less ▲]

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See detailVisual Literacy
Weth, Constanze UL; Gretsch, Petra

in Gretsch, Petra; Holzäpfel, Lars (Eds.) Lernen mit Visualisierungen. Erkenntnisse aus der Forschung und deren Implikationen für die Fachdidaktik (2016)

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See detailVisual Modeling and Analysis of EMF Model Transformations based on Triple Graph Grammars
Ermel, Claudia; Hermann, Frank UL; Gall, Jürgen et al

in Electronic Communications of the EASST (2012)

The tool HENSHIN is an Eclipse plug-in supporting visual modeling and execution of rule-based EMF model transformations. This paper describes the recent extensions of HENSHIN by a visual editor for triple ... [more ▼]

The tool HENSHIN is an Eclipse plug-in supporting visual modeling and execution of rule-based EMF model transformations. This paper describes the recent extensions of HENSHIN by a visual editor for triple graph grammars (TGGs). The visual editor (called HENSHINTGG) supports a compact visualization of triple rules in an integrated editor panel. Internally, triple graph rules are represented as HENSHIN rules and can be simulated using the HENSHIN EMF model transformation engine. Our extension supports the automatic generation of forward translation rules for transforming source into target models. A converter from HENSHIN TGG rules to the graph transformation analysis tool AGG allows a systematic check for conflicts of forward translation rules in AGG based on critical pair analysis. [less ▲]

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See detailVisual Modelling of and on Tangible User Interfaces
Tobias, Eric; Kelsen, Pierre UL

Report (2012)

The purpose of this thesis is to investigate the use and benefit of visual modelling languages (VMLs) in modelling on tangible user interfaces (TUIs), and modelling TUI applications. Three main research ... [more ▼]

The purpose of this thesis is to investigate the use and benefit of visual modelling languages (VMLs) in modelling on tangible user interfaces (TUIs), and modelling TUI applications. Three main research questions are asked: - Is it possible and practical to model an application or process using a TUI? - Which General-purpose VML (GPVML) performs best in modelling a VML scenario for use on TUI? - Is it realistic to use a GPVML to model complex TUI applications? To answer the first research question, a Business Process Model and Notation, version 2 (BPMN2), ideation scenario is used with a tangible widget toolkit prototype on a TUI table to evaluate the performance and obtain feedback from test candidates. The study showed that it is possible to model a process using a TUI and the test candidate feedback did not lead to the conclusion that the modelling was cumbersome or impractical. To find a suitable GPVML, the thesis explores and evaluates the current state of the art in VMLs for describing general problems. After gathering different VMLs, the thesis compares three languages using a simple scenario: the visual object constraint language (VOCL), augmented constraint diagrams (ACD), and the visual contract language (VCL). A weighted evaluation based on multiple quality criteria led to the conclusion that VCL is best suited to model TUI applications, answering the second research question. The thesis answers the third research question by using VCL to model a more complex and complete scenario of an ideation process, which is based on using a BPMN2 on a TUI. This is done to assess VCL's suitability to more complex problems and its maturity. The study concludes that VCL is not yet mature enough to enable its general applicability in a wide variety of settings. The three research questions were dressed with a hypothesis in mind: collaborative, novice friendly modelling environments are able to reduce the gap between stakeholders and software engineers during software projects, leading to a reduction of unrealistic expectations and an increase in the availability of domain knowledge. While the hypothesis is too broad to be proven by this thesis, the research questions answered here give some insights into how to approach it. [less ▲]

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See detailVisual Notation Design 2.0: Towards User-Comprehensible RE Notations
Caire, Patrice UL; Genon, Nicolas; Heymans, patrick et al

in Proceedings of the 21st IEEE International Requirements Engineering Conference (2013)

The success of requirements engineering depends critically on effective communication between business analysts and end users, yet empirical studies show that business stakeholders understand RE notations ... [more ▼]

The success of requirements engineering depends critically on effective communication between business analysts and end users, yet empirical studies show that business stakeholders understand RE notations very poorly. This paper proposes a novel approach to designing RE visual notations that actively involves naïve users in the process. We use i*, one of the most influential RE notations, to demonstrate the approach, but the same approach could be applied to any RE notation. We present the results of 5 related empirical studies that show that novices consistently outperform experts in designing symbols that are comprehensible to novices: the differences are both statistically significant and practically meaningful. Symbols designed by novices increased semantic transparency (their ability to be spontaneously interpreted by other novices) by almost 300% compared to the existing i* notation. The results challenge the conventional wisdom about visual notation design: that it should be conducted by a small group of experts; our research suggests that instead it should be conducted by large numbers of novices. This approach is consistent with principles of Web 2.0, in that it harnesses the collective intelligence of end users and actively involves them in the notation design process as “prosumers” rather than as passive consumers. We believe this approach has the potential to radically change the way visual notations are designed in the future. [less ▲]

Detailed reference viewed: 200 (7 UL)