Surfaces play an important role in visual perception. They are perceived as ‘(perceptual) reliefs’. that are surfaces in 2 + 1D perceptual space, that is the product space of the 2D visual field and the ID ‘depth dimension’. It is in many respects irrelevant whether the observer views a true 3D scene or a flat (2D) picture of a scene. In both cases, the percepts are reliefs in 2 + ID perceptual...

Rare or narrowly distributed species may be threatened by stressors to which they have never been exposed or for which data are very limited. In such cases the species response cannot be predicted on the basis of directly measured data, but may be inferred from the response of one or more appropriate surrogate species. Here, I propose a practical way to use the stressor response of one or more ...

Abstract The free boundary value problem of reaction-diffusion equation is studied. In the first chapter, Logistic diffusion with and main work this paper are introduced. second chapter preparation work, explaining existence uniqueness solution equation. third we prove that messages propagate or disappear in finite time by constructing asymptotic properties upper lower solutions. 4, criterion d...

I RISE NOW TO SPEAK with the assumption that all of you know very well what, I am going to say. I am the humanist here, the professor of English. We humanists, when asked to speak on questions of science and technology, arc notorious for offering an embarrassed and ignorant respect toward those matters, a respect, however, which can all too quickly degenerate into insolent condescension. Face t...

Recent disgracing reports are warning the scientific communities to think more about the solutions to win the battle against predatory journals and publishers. Current integrity and accuracy in science is a result of decades of honest works and publications which are an asset, now everyone as stakeholders of science should feel the responsibility to sustain its high privileged level. The ethica...

A shortage of nurses is currently a problem in several countries, and an important question is therefore how one can increase the supply of nursing labour. In this paper, we focus on the issue of nurses leaving the public health sector by utilising a unique data set containing information on both the supply and demand side of the market. To describe the exit rate from the health sector we apply...