Online research in philosophy

New readings of Chaucer's dream visions, demonstrating his philosophical interests and learning.

Let L ω ∞ω be the infinitary language obtained from the first-order language of graphs by closure under conjunctions and disjunctions of arbitrary sets of formulas, provided only finitely many distinct variables occur among the formulas. Let p(n) be the edge probability of the random graph on n vertices. It is shown that if p(n) ≪ n -1 satisfies certain simple conditions on its growth rate, then for every σ∈ L ω ∞ω , the probability that σ holds for the (...) random graph on n vertices converges. In fact, if $p(n) = n^{-\alpha}, \alpha > 1$ , then the probability is either smaller than 2 -n d for some $d > 0$ , or it is asymptotic to cn -d for some $c > 0, d \geq 0$ . Results on the difficulty of computing the asymptotic probability are given. (shrink)

Henri Lefebvre a développé une œuvre riche sur l'urbain et la ville. Dans les années 1980, il travaille à une rythmanalyse qui, par bien des aspects, complète cette réflexion. La rythmanalyse peut être définie comme une science devenue pratique, qui consiste en la saisie des modalités des temps et des espaces sociaux concrets par les rythmes. Cette saisie s'effectue par le corps dans sa sensibilité et vise à sa thérapie, à son rétablissement face à son mépris dans la modernité et (...) l'urbain. Le corps est le (...) - Urbanisme – Nouvel article. (shrink)

The status of population genetics has become hotly debated among biologists and philosophers of biology. Many seem to view population genetics as relatively unchanged since the Modern Synthesis and have argued that subjects such as development were left out of the Synthesis. Some have called for an extended evolutionary synthesis or for recognizing the insignificance of population genetics. Yet others such as Michael Lynch have defended population genetics, declaring "nothing in evolution makes sense except in the light of population (...) genetics" (a twist on Dobzhansky's famous slogan that "nothing in biology makes sense except in the light of evolution"). Missing from this discussion is the use of population genetics to shed light on ecology and vice versa, beginning in the 1940s and continuing until the present day. I highlight some of that history through an overview of traditions such as ecological genetics and population biology, followed by a slightly more in-depth look at a contemporary study of the endangered California Tiger Salamander. I argue that population genetics is a powerful and useful tool that continues to be used and modified, even if it isn't required for all evolutionary explanations or doesn't incorporate all the causal factors of evolution. (shrink)

I J’ai grandi au milieu des collines bleues et des lacs cristallins des Appalaches, loin de l’artifice des grandes métropoles : je vivais dans des conditions plus primitives, moins compliquées que dans l’effervescence des zones très peuplées. La nature fut mon premier professeur et les animaux domestiques mes premiers compagnons. Ma jeunesse s’écoula dans ce cadre et c’est là que je conçus pour la première fois l’idée que les animaux parlent. Enfant, je croyais que tous les animaux d’une même..