On Heroism & The Oregon Trail

We like to think we are secret beauties. To think we are big ships. We like to think we arenoticed, in secret, by some keen eye, and it is enough. It is never enough

First record of Hypsocephalus dahli in Switzerland with a review of its distribution, ecology and taxonomy (Araneae, Linyphiidae)

The spider species Hypsocephalus dahli (Lessert, 1909) is recorded for the first time in Switzerland from museum material collected in 1974. The information given in the literature and unpublished data on this rare species are summarised including an annotated distribution map. All published pictures of males are compared with the holotype. Figures of the male palp and the vulva of the Swiss specimens are provided

A relativistic superalgebra in a generalized Schroedinger picture

We consider a relativistic superalgebra in the picture in which the time and spatial derivative cannot be presented in the operators of the particle. The supersymmetry generators as well as the Hamilton operators for the massive relativistic particles with spin zero and spin-1/2 are expressed in terms of the principal series of the unitary representations of the Lorentz group. We also consider the massless case. New Hamilton operators are conctructed for the massless particles with spin zero and spin 1/2.Comment: 7 page

One particle quantum equation in a de Sitter spacetime

We consider a free particle in a de Sitter spacetime. We use a picture in which the analogs of the Schr\"odinger operators of the particle are independent of both the time and the space coordinates. These operators induce operators which are related to Killing vectors of the de Sitter spacetime.Comment: 12 page