In £ight cages, worker bumblebees (Bombus impatiens) spontaneously explored the surroundings of their nest and foraged in complete darkness by walking instead of £ying from feeders up to 150 cm away from the nest. This behaviour was wholly unexpected in these classically visual foragers. The ¢nding

of whether the original elicitation was spoken or visual. In addition, this effect occurs both while watching a blank white board and while sitting in complete darkness. This study includes 4 experiments. The first 2 experiments measured eye movements of participants looking at a blank white board

This article shines some light in the "four dark corners," exposing problems and proposing solutions. We show that all descriptions involved in requirements engineering should be descriptions of the environment. We show that certain control information is necessary for sound requirements

INTRODUCTION Interviews with victims after large fires have demonstrated that occupants could benefit from additional wayguidance information to efficiently move to safety, especially when evacuating during a power failure or in smoke conditions (Proulx, 1998; Fahy and Proulx, 1995). Installing a Photoluminescent Material (PLM) wayguidance system along evacuation routes appears to be a potential means of improving occupants' fire safety. A PLM system consists of signage elements that can be installed in the form of signs, paint, strips or fabric on any surface. The particularity of this non-radioactive material is that it contains pigments which have the capacity to store, in a few minutes, the energy from normal lighting. The material will restore this energy as a yellowish-green glow when all lights are extinguished. The initial bright glow emitted by the material will gradually diminish in brightness, but will remain visible for 3 to 40 hours, depending upon the type of material us

. (This is why we say that the scheduler is completely in the dark.) Given all this, we prove t...

range than any single picture. The dark pictures show us highlight details of the scene that would be washed out in a "properly exposed" picture, while the light pictures show us some shadow detail that would also not appear in a "properly exposed" picture. We propose a means

the same couplings that control the Higgs potential also determine various dark matter cross sections, the dark top scenario is quite predictive once the dark top mass and various quantum numbers are specified. We construct two concrete examples of dark top models with plausible UV completions and study

-bodied, dark ale whose taste alone is a reward. Changing the scenery again, you are in the middle of a Saturday morning market in a small town in southern France and run into a nicely arranged stand of rosé and red wines. Knowing the presumably delicious contents of the differently priced bottles to varying

and cold dark matter cosmologies. Most dwarf spiral galaxies are almost completely dark matter dominated, allowing a unique insight into their mass – density profiles which can be approximated by isothermal spheres with core radii of order 3 – 7 kpc. We can therefore make a direct comparison between

Extra-dimensional theories contain additional degrees of freedom related to the geometry of the extra space which can be interpreted as new particles. Such theories allow to reformulate most of the fundamental problems of physics from a completely different point of view. In this essay we