A special family of stacked central configurations: Lagrange plus Euler in one

This is a post-peer-review, pre-copyedit version of an article published in Journal of dynamics and differential equations. The final authenticated version is available online at: http://dx.doi.org/10.1007/s10884-018-9647-1We show the existence of a family of stacked central configurations in the planar five-body problem with a special property. Three bodies m1, m2 and m3, ordered from left to right, are collinear and form an Euler central configuration, and the other two bodies m4 and m5, together with m2 are at the vertices of an equilateral triangle and form a Lagrange central configuration.Peer ReviewedPostprint (author's final draft

Atmospheric input of polycyclic aromatic hydrocarbons to the sea surface microlayer

Atmospheric input of polycyclic aromatic hydrocarbons (PAH) to water was studied and the effects of sea surface microlayer (SSM) determined. The York River system and the Perrin River areas were monitored with a drum skimmer and a high volume air sampler. Experiments were conducted in the laboratory under controlled conditions. The SSM extracted vapor phase PAH of low molecular weight from the air, and there, aromatic compounds went from dissolved into particulate phase very rapidly. Water covered with a natural SSM received much less atmospheric input of PAH than water without SSM in a given period of time. Henry\u27s law constant did not apply when SSM was present. The high uptake capacity of this type of film makes it impossible to approach equilibrium conditions in the marine atmospheric environment

A Framework for Responsive Environments

In this paper, we define Responsive Environments as adaptive ven- ues that possess context awareness, deliver ubiquitous computing and natural interaction. They also yield a pre-determined User Experience. We propose a framework for the development and assessment of such environments and we discuss applying the framework to some examples. Highlighting benefits and usefulness of the framework

Economic vulnerability and resilience of small states

The economic vulnerability of small states has, during the past two decades or so, been explored by many analysts. The awareness that small economic size almost necessarily leads to a high degree of economic openness and export concentration has led to the conclusion that such states are very exposed to factors outside their control, and they are therefore very susceptible to external shocks. The high degree of fluctuations in GDP and in export earnings registered by many small states is considered as one of the manifestations of such exposure.peer-reviewe