We report a study of penetration of the VLF electromagnetic waves induced by lightning to the ionosphere. We compare the fractional hop whistlers recorded by the ICE experiment onboard the DEMETER satellite with lightning detected by the EUCLID detection network. To identify the fractional hop whistlers, we have developed software for automatic detection of the fractional-hop whistlers in the V...

In this paper, we describe how to construct physical computer network topologies which can support the establishment of overlays that reduce or increase the distances between nodes. Reducing pairwise distances (i.e., compression) implies that the overlay enjoys significantly lower inter-node latencies compared to the ambient physical network; such an overlay can be used to implement a “high-per...

The phrase ‘global land grab’ has become a catch-all framework to describe and analyze the current explosion of (trans)national commercial land transactions revolving around the production and sale of food and biofuels. Initially deployed and popularised especially by activist groups deeply concerned and opposed to such transactions from an environmental-agrarian justice perspective, the signif...

BACKGROUND The aim of this study was to compare between weight and gender categories the attack and pause times during the 2007 Taekwondo World Championship. METHODS A total of 88 rounds (47 male and 41 female contests) were analyzed. RESULTS There was no difference in attack/balancing times ratio between genders (0.13 ± 0.06 vs 0.13 ± 0.06, P > 0.05). The attack number was significantly hi...

We present a systematic and self-consistent analysis of four-quark charmonium states and applied it to study compact four-quark systems and meson-meson molecules. Our results are robust and should serve to clarify the situation of charmonium spectroscopy above the threshold production of charmed mesons.

A new technique called CUT&RUN can map the distribution of proteins on the genome with higher resolution and accuracy than existing approaches.