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Sagar, J. (author), Visser, A. (author)
For Micro Aerial Vehicles (MAVs), robust obstacle avoidance during flight is a challenging problem because only light weight sensors as monocular cameras can be mounted as payload. With monocular cameras depth perception cannot be estimated from a single view, which means that information has to be estimated by combining images from multiple...
conference paper 2014
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Erdweg, S.T. (author), Vergu, V.A. (author), Mezini, Mira (author), Visser, Eelco (author)
A key problem in metaprogramming and specifically in generative programming is to guarantee that generated code is well-formed with respect to the context-free and context-sensitive constraints of the target language. We propose typesmart constructors as a dynamic approach to enforcing the well-formedness of generated code. A typesmart...
conference paper 2014
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Visser, Eelco (author)
Effectively applying linguistic abstraction to emerging domains of computation requires the ability to rapidly develop software languages. However, a software language is a complex software system in its own right and can take significant effort to design and implement. We are currently investigating a radical separation of concerns in language...
conference paper 2014
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Bouwers, E.M. (author), van Deursen, A. (author), Visser, J (author)
conference paper 2014
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Methenitis, G. (author), De Kok, P.M. (author), Nugteren, S. (author), Visser, A. (author)
In this paper an extension of the model-based visual compass is presented, which can be updated continuously, allowing a robot to orient itself in a changing environment. To build a model, colors in the image are discretized to an automatically generated color profile, and transitions between these classes within vertical lines are used as...
conference paper 2013
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Girardi, N. (author), Kooijman, C. (author), Wiggers, A.J. (author), Visser, A. (author)
This paper describes a framework for optimizing walking parameters for a Nao humanoid robot. In this case an omnidirectional walk is learned. The parameters are learned in simulation with an evolutionary approach. The best performance was obtained for a combination of a low mutation rate and a high crossover rate.
conference paper 2013
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Visser, A.J. (author)
conference paper 2013
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Raemaekers, S.B.A. (author), Nane, G.F. (author), van Deursen, A. (author), Visser, J (author)
conference paper 2013
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Sabbatini, D (author), Janssens, K (author), Hartjes, S. (author), Visser, H.G. (author), Gennaretti, M (author), Bernardini, Giovanni (author)
This paper presents a sound synthesis approach that allows investigating the noise annoyance of rotorcraft in relation to the source components and flight path. The sound synthesis is based on a source-transfer-receiver model, describing the noise emission and directivity of the sources and their propagation towards the receiver point on the...
conference paper 2013
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Visser, W. (author), Aydogan, R. (author), Hindriks, K.V. (author), Jonker, C.M. (author)
conference paper 2012
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Raemaekers, S.B.A. (author), van Deursen, A. (author), Visser, J. (author)
Backward compatibility is a major concern for any library developer. In this paper, we evaluate how stable a set of frequently used third-party libraries is in terms of method removals, implementation change, the ratio of change in old methods to change in new ones and the percentage of new methods in each snapshot. We provide a motivating...
conference paper 2012
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Visser, W.M. (author), Hindriks, K.V. (author), Jonker, C.M. (author)
In the context of practical reasoning, such as decision making and negotiation, it is necessary to model preferences over possible outcomes. Such preferences usually depend on multiple criteria. We argue that the criteria by which outcomes are evaluated should be the satisfaction of a person’s underlying interests: the more an outcome satisfies...
conference paper 2011
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Visser, W.M. (author), Hindriks, K.V. (author), Jonker, C.M. (author)
Preferences are derived in part from knowledge. Knowledge, however, may be defeasible. We present an argumentation framework for deriving qualitative, multi-attribute preferences and incorporate defeasible reasoning about knowledge. Intuitively, preferences based on defeasible conclusions are not as strong as preferences based on certain...
conference paper 2011
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Zhao, G. (author), Visser, P.J. (author), Vrijling, J.K. (author)
This paper describes the hydrodynamic erosion process of undisturbed clay due to the turbulent flow, based on theoretical analysis and experimental results. The undisturbed clay has the unique and complicated characteristics of cohesive force among clay particles, which are highly different from disturbed clay and non-cohesive sand. Based on...
conference paper 2011
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Kuiper, B.R. (author), Visser, H.G. (author), Heblij, S. (author)
This paper presents the development of a runway allocation planning tool that seeks to maximize the permissible number of flight operations into and out of an airport within a given annual noise budget. Although the model that underlies the planning tool is generic in nature, the tool has been customized for application to a specific airport,...
conference paper 2011
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Braakenburg, M.L. (author), Hartjes, S. (author), Visser, H.G. (author), Hebly, S.J. (author)
This paper presents preliminary results from an ongoing research effort towards the development of a multi-event trajectory optimization methodology that allows to synthesize RNAV approach routes that minimize a cumulative measure of noise, taking into account the total noise effect aggregated for all inbound flight movements taking place within...
conference paper 2011
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Visser, A. (author), Dijkshoorn, N. (author), Van der Veen, M. (author), Jurriaans, R. (author)
This article describes a method to develop an advanced navigation capability for the standard platform of the IMAV indoor competition: the Parrot AR.Drone. Our development is partlybased on simulation, which requires both a re-alistic sensor and motion model. This article de-scribes how a visual map of the indoor environ-ment can be made,...
conference paper 2011
document
Visser, W.M. (author), Hindriks, K.V. (author), Jonker, C.M. (author)
Preferences are derived in part from knowledge. Knowledge, however, may be defeasible. We present an argumentation framework for deriving qualitative, multi-attribute preferences and incorporate defeasible reasoning about knowledge. Intuitively, preferences based on defeasible conclusions are not as strong as preferences based on certain...
conference paper 2011
document
Peeters, P. (author), Van Hoestenberghe, T. (author), Vincke, L. (author), Visser, P.J. (author)
The use of breach models includes two tasks: predicting breach characteristics and estimating flow through the breach. Strengths and weaknesses as well as opportunities and threats of different simplified and detailed physically-based breach models are listed following theoretical and practical criteria. According to the theoretical criteria,...
conference paper 2011
document
Bench-Capon, T. (author), Prakken, H. (author), Visser, W. (author)
A formal two-phase model of democratic policy deliberation is presented, in which in the first phase sufficient and necessary criteria for proposals to be accepted are determined (the ‘acceptable’ criteria) and in the second phase proposals are made and evaluated in light of the acceptable criteria resulting from the first phase. Such a...
conference paper 2011
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