8 research outputs found
An Ising Model for Metal-Organic Frameworks
We present a three-dimensional Ising model where lines of equal spins are
frozen in such that they form an ordered framework structure. The frame spins
impose an external field on the rest of the spins (active spins). We
demonstrate that this "porous Ising model" can be seen as a minimal model for
condensation transitions of gas molecules in metal-organic frameworks. Using
Monte Carlo simulation techniques, we compare the phase behavior of a porous
Ising model with that of a particle-based model for the condensation of methane
(CH) in the isoreticular metal-organic framework IRMOF-16. For both models,
we find a line of first-order phase transitions that end in a critical point.
We show that the critical behavior in both cases belongs to the 3D Ising
universality class, in contrast to other phase transitions in confinement such
as capillary condensation.Comment: 11 pages, 9 figure
Local electrical diagnostics of a homogeneous Dielectric Barrier Discharge at atmospheric pressure
International audienc
Local electrical diagnostics of a homogeneous Dielectric Barrier Discharge at atmospheric pressure
International audienc
A mid-term analysis of progress toward international biodiversity targets
In 2010 the international community, under the auspices of the Convention on Biological Diversity, agreed on 20 biodiversity-related “Aichi Targets” to be achieved within a decade. We provide a comprehensive mid-term assessment of progress toward these global targets using 55 indicator data sets. We projected indicator trends to 2020 using an adaptive statistical framework that incorporated the specific properties of individual time series. On current trajectories, results suggest that despite accelerating policy and management responses to the biodiversity crisis, the impacts of these efforts are unlikely to be reflected in improved trends in the state of biodiversity by 2020. We highlight areas of societal endeavor requiring additional efforts to achieve the Aichi Targets, and provide a baseline against which to assess future progress