We present new population synthesis calculations of close young neutron stars. In comparison with our previous investigation we use a different neutron star mass spectrum and different initial spatial and velocity distributions. The results confirm that most of ROSAT dim radioquiet isolated neutron stars had their origin in the Gould Belt. Several tens of young neutron stars can be identified i...

Stephen Jay Gould's last book and magnum opus is first and mainly a theoretical revision. The revision is of Darwinism, in both its original and Modern Synthesis formulations, of what Gould calls the " tripod of support " on which the theory of natural selection traditionally rests. This tripod consists of three major claims: (1) The sufficiency of natural selection acting at the level of the i...

The aim of this paper is to prove the existence of inverse pairs for a certain class of numbertheoretic functions. An application of the result is also illustrated. The motivation comes from the study of functions such as Ck(n)= £ l and **(»)= I 1 • a>\ (ah...,ak) = l Gould [1] showed that Ck(n) = Hd\nRk(d) and that i^(/0 has an inverse. In [5] a pair of functions similarly related is also stud...

* Catherine Ward is with the Department of Psychology and the Safety and Violence Initiative at the University of Cape Town. Chandré Gould is a senior research fellow in the Governance, Crime and Justice Programme at the Institute for Security Studies. Jane Kelly is a doctoral student in the Department of Psychology at the University of Cape Town. Katya Mauff was a consultant in the Department ...

Twenty years have passed since Gould and Lewontin published their critique of 'the adaptationist program' - the tendency of some evolutionary biologists to assume, rather than demonstrate, the operation of natural selection. After the 'Spandrels paper', evolutionists were more careful about producing just-so stories based on selection, and paid more attention to a panoply of other processes. Th...

Eight new species of lice in the genus Columbicola Ewing are described: C. harbisoni (type host: Phaps histrionica (Gould)), C. koopae (type host: Geophaps scripta (Temminck)), C. eowilsoni (type host: Geophaps smithii (Jardine and Selby), C. wombeyi (type host: Geophaps plumnifera Gould), C. masoni (type host: Petrophassa rufipennis Collett), C. waiteae (type host: Columba leucomela Temminck),...

Gould and Lewontin's 30-year-old critique of adaptionism fundamentally changed the discourse of evolutionary biology. However, with the influx of new ideas and scientific traditions from genomics into evolutionary biology, the old adaptionist controversies are being recycled in a new context. The insight gained by evolutionary biologists, that functional differences cannot be equated to adaptiv...

The idea of monomiality traces back to the early forties of the last century, when J.F. Steffensen, in a largely unnoticed paper [1], suggested the concept of poweroid. A new interest in this subject was created by the work of G. Dattoli and his collaborators [2], [3] It turns out that all polynomial families, and in particular all special polynomials, are essentially the same, since it is poss...