Publicaties

It is folklore that the slow and fast growing hierarchy match up for the first time at the proof-theoretic ordinal of (Pi^1_1-CA)_0. By results of Schütte and Simpson it is known that the underlying notation system looses its strengths when the ordinal addition function is no longer present. In this article we will show that a hierarchy comparison can still be established. Surprisingly the match of the slow and fast growing hierarchy can be ...

This study investigates the effects of hierarchical differences on mediation satisfaction in e-supported mediations compared to face-to-face mediations. Specifically, we compare face-to-face mediations and mediations in which an online intake is used before the joint face-to-face session (hybrid types of mediation). We assume that the use of an online intake before the joint mediation mitigates the effects of hierarchy on parties’ satisfaction ...

The neutrino mass hierarchy is one of the few remaining unknown parameters in the neutrino sector and hence a primary focus of the experimental community. The Precision IceCube Next Generation Upgrade (PINGU) experiment, to be co-located with the IceCube DeepCore detector in the deep Antarctic glacier, is being designed to provide a first definitive measurement of the mass hierarchy. We have conducted feasibility studies for the detector design ...

The hypothesis of a Hierarchy of the Sciences, first formulated in the 19(th) century, predicts that, moving from simple and general phenomena (e.g. particle dynamics) to complex and particular (e.g. human behaviour), researchers lose ability to reach theoretical and methodological consensus. This hypothesis places each field of research along a continuum of complexity and "softness", with profound implications for our understanding of ...

Animals show remarkable rich motion skills which are still far from realizable with robots. Inspired by the neural circuits which generate rhythmic motion patterns in the spinal cord of all vertebrates, one main research direction points towards the use of central pattern generators in robots. On of the key advantages of this, is that the dimensionality of the control problem is reduced. In this work we investigate this further by introducing a ...

System theory, and most particularly hierarchy theory, must be consistent with philosophy. In his book "Logic in Reality", Brenner reinforces the traditional philosophic position that an entity can only exist in relation to its non-existence. This leads to a duality in system theory which is consistent with the selective division of Nature into entity and ecosystem, where the two depend on different criteria and even different logics. A ...

This paper presents class hierarchy flattening, a novel obfuscation technique for programs written in object-oriented, managed programming languages. Class hierarchy flattening strives for maximally removing the inheritance relations from object-oriented programs, thus hiding the overall design of the program from reverse engineers and other attackers. We evaluate the potential of class hierarchy flattening by means of a fully automated ...

In recent years, there has been an explosion of interest in indicators in several domains. This reflects growing recognition of the important role indicators can play as a tool for enhancing the quality of decision making. Indicators express an aspect of a phenomenon in an understandable and relevant way and are useful in terms of monitoring, evaluation and communication. Like other policies, road safety policy could benefit from the use of ...

In recent years, there has been an explosion of interest in indicators in several domains. This reflects growing recognition of the important role indicators can play as a tool for enhancing the quality of decision making. Indicators express an aspect of a phenomenom in an understandable and relevant way and are useful in terms of monitoring, evaluation and communication. Like other policies, road safety policy could benefit from the use of ...

Road safety is a relevant theme to study, due to the human as well as financial suffering caused by road crashes. To improve the level of road safety in a country, it is important to gain insight into this complex phenomenon. The development of a diverse set of road safety related indicators is valuable in this respect. Here, the concept of the road safety target hierarchy is used as a theoretical framework for presenting essential indicators of ...