As pointed out by Corrado and Fingleton ([2012]), any assumption about the spatial weight matrix is fundamental to the specification of spatial phenomena, when measuring the strength and direction of interactions between spatial units (see Mur [2013]).
Uncovering the existence and direction of interactions between elements of a set of signals remains a difficult and arduous task that one has to face if one wants to understand the mechanisms at work in most biological phenomena and make full use of the high-throughput experimental data that is now more and more available.
Further, the strength and direction of interactions between introduced and native species, as well as between above- and belowground biota depends on both biotic and abiotic features of the system to which an alien species is dispersed.
Furthermore, we recorded the directions of interactions between genes (or proteins) as well to the graph.
To date, there have been two research directions toward the detection of interactions between drug candidate compounds and target candidate proteins: the traditional drug discovery approach and the chemical biology approach.
A strict analysis shows that a specific coupling of multi-atom Van der Waals interactions with covalent bonding can, in extreme cases, increase (or decrease) the interaction energy by about 20 40% at certain angles between the direction of interaction and the covalent bond.
The correlation measure of the entire data is beneficial for determining the strength of association between nodes (see Section 2.4) but disadvantageous for detecting the direction of interaction.
Our results suggest a prominent role of density in driving the direction of the interaction between L. pipiens tadpoles and Ranavirus.
Taken together, these results are thought to be of importance for current models of speech perception, pointing in the direction of an interaction between bottom-up and top-down factors even at the lowest levels of spoken word recognition.
The direction of the interaction between sex and BPA exposure is not clear because most of these studies have used different BPA doses, routes of exposure, and end points (Chapin et al. 2008).
