In: Financial Markets and Portfolio Management, 2008, vol. 22, no. 2, p. 147-167
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In: Journal of Combinatorial Optimization, 2013, vol. 26, no. 2, p. 345-371
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In: Journal of Economic Behavior & Organization, 2020, vol. 177, p. 836-857
Research in criminology has shown that the perceived risk of apprehension often differs substantially from the true level. To incorporate this insight, we extend the standard economic model of law enforcement (Becker, 1968) by considering two types of offenders, sophisticates and naïves. Sophisticates always fully take the actual enforcement effort into account, while naïves do so only when the...
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In: Journal of Theoretical Biology, 2017, vol. 420, p. 174–179
The reconstruction of phylogenetic trees from discrete character data typically relies on models that assume the characters evolve under a continuous-time Markov process operating at some overall rate λ. When λ is too high or too low, it becomes difficult to distinguish a short interior edge from a polytomy (the tree that results from collapsing the edge). In this note, we investigate the rate...
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(Working Papers SES ; 464)
This paper integrates into public economics a biologically founded, stochastic process of individual ageing. The novel approach enables us to investigate the interaction between health and retirement policy in order to quantitatively characterize the optimal joint design of the social insurance system today and in response to future medical progress, and its implications for health inequality....
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In: Physical Review E, 2009, vol. 79, no. 5, p. 052102
We study a system of self-propelled agents with the restricted vision. The field of vision of each agent is only a sector of disk bounded by two radii and the included arc. The inclination of these two radii is characterized by the view angle. The consideration of restricted vision is closer to the reality because natural swarms usually do not have a panoramic view. Interestingly, we find that...
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Thèse de doctorat : Université de Fribourg, 2001 ; N° 1353.
Die vorliegende Dissertation beschäftigt sich mit der Optimierung automatisierter Kompaktlager in der Phase des Entwurfs und bei der Entwicklung der Lagersteuerung. Automatisierte Kompaktlager bilden in der modernen Lagertechnik eine platzsparende Alternative zu herkömmlichen Zeilenregallagern. Ein automatisiertes Kompaktlager besteht aus mehreren Lagerebenen, welche gegliedert sind in parallel...
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Mémoire de master : Université de Fribourg, 2020.
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In: Journal of the Optical Society of America: B, 2005, vol. 22 No. 1, p. 77-87
Cardiomagnetometry is a growing field of noninvasive medical diagnostics that has triggered a need for affordable high-sensitivity magnetometers. Optical pumping magnetometers (OPMs) are promising candidates for satisfying that need since it has been demonstrated that they can be used to map the magnetic field of the beating human heart. We discuss the principle of a phase-detecting OPM and...
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In: Thin Solid Films, 2011, vol. 519, no. 9, p. 2703-2706
Accurate spectroellipsometric (SE) measurements in the rotating analyzer (RAE) or rotating polarizer (RPE) configurations require accurate values of the polarizer/analyzer(/retarder) azimuths. While the readings are usually fairly accurate, true values are influenced by possible offsets between the plane of incidence, physical axes of the elements, and the instrument scales. The offsets are often...
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