Fitting of the ex-Gaussian distribution to reaction times and drawing conclusions from its estimated parameter values is becoming increasingly popular. The purpose of this note is to show that the ex-Gaussian distribution is inappropriate, given assumptions that are often made about the processes underlying reaction times. If so, the estimated parameters may be misleading, and the inferences fr...

Let G be an arbitrary group. We show that if the Fitting subgroup of G is nilpotent then it is definable. We show also that the class of groups whose Fitting subgroup is nilpotent of class at most n is elementary. We give an example of a group (arbitrary saturated) whose Fitting subgroup is definable but not nilpotent. Similar results for the soluble radical are given.

A well-known but previously unpublished monograph by Ramchandran Jaikumar (1945–1998) on the nature and history of manufacturing. The development of mass manufacturing ranks as one of the most important contributions to human living conditions ever – of the same magnitude as agriculture and modern medicine. This monograph examines the development of manufacturing over several centuries, through...

Personal information Name Ruben Hanssen Student number 4253930 Telephone number 0615574855 E-mail address [email protected], [email protected] Graduation studio Name / Theme Design of the Urban Fabric Teachers Stefan van der Spek Paul de Ruiter Argumentation of choice of the studio This studio has been chosen because my graduation project focuses on elements of the urban form ...

The introduction of the joint image manifold allows to treat the problem of recovering camera motion and epipolar geometry as the problem of fitting a manifold to the data measured in a stereo pair. The manifold has a singularity and boundary, therefore care must be taken when fitting it. This paper reviews the notion of joint image manifold, and how previous motion recovery methods can be view...

Justification Logic provides an axiomatic description of justifications and delegates the question of their nature to semantics. In this note, we address the conceptual issue of the logical type of justifications: we argue that justifications in the logical setting are naturally interpreted as sets of formulas which leads to a class of epistemic models that we call modular models. We show that ...

This paper considers the two-point resolution of imaging systems from the viewpoint of model fitting theory. Earlier results have been extended to include (partially) coherent sources of unknown intensity. Furthermore, it is shown how the probability of resolution can be computed. This probability can be used to compare the performance of different imaging systems.

Let p ≥ 5 be a prime number and let Fp be a finite field. In this work, we determine the number of rational points on singular curves Ea : y = x(x − a) over Fp for some specific values of a. Keywords—Singular curve, elliptic curve, rational points.