Tip: here are the keyword queries that people search for but don't actually find in the search results.
Planetary seismology is a key technique to image the internal structure of planetary objects, and target fundamental science objectives from the formation of planetary systems to the characterization of habitable worlds. With the SEIS instrument on board InSight mission, Europe has demonstrated its leadership in developing such instrumentation. PIONEERS will allow Europe to keep its technological advance and to enter a new realm of planetary exploration with an innovative ground motion
instrumentation concept relying on high precision sensors based on optical interferometry, and on 6 degrees of freedom (6 DoF, with 3 translations and 3 rotations) measurements that provide substantial more science return compared to usual seismometers. The PIONEERS project will develop two 6 DoF instruments for measuring ground deformations of planetary objects. The first instrument is a very low noise 6-DoF engineering model dedicated to imaging the internal structure of terrestrial planets.
The second one is a high TRL, reduced scale version of the same instrument dedicated to the exploration of small bodies, in order to support planetary defense and asteroid resources applications. We will build the instruments with the expertise in planetary seismology and high performance optical technologies provided by the PIONEERS partners. Innovative data analysis methods, as well as Earth analogue field testing will validate the expected increase of performance level by two orders of
magnitude. Cost optimization, ITAR-free strategy and adaptation to CubeSat standards will drive other technological developments opening new markets for high precision scientific instrumentation. Instruments developed by our consortium members are demonstrating their predominance this year (SEIS on board InSight, blueSeis commercial rotational seismometer release, ROMY laser interferometer). It is therefore the right time to keep European leadership strong by innovating both on instrument
The topics are the nodes (words) that tend to co-occur together in the same context (next to each other).
We use a combination of clustering and graph community detection algorithm (Blondel et al based on Louvain) to identify the groups of nodes are more densely connected together than with the rest of the network. They are aligned closer to each other on the graph and are given a distinct color.
We use the Jenks elbow cutoff algorithm to select the top prominent nodes that have significantly higher influence than the rest.
Click the Reveal Non-obvious button to remove the most influential words (or the ones you select) from the graph, to see what terms are hiding behind them.
The most influential nodes are either the ones with the highest betweenness centrality — appearing most often on the shortest path between any two randomly chosen nodes (i.e. linking the different distinct communities) — or the ones with the highest degree.
A structural gap shows the two distinct communities (clusters of words) in this graph that are important, but not yet connected. That's where the new potential and innovative ideas may reside.
This measure is based on a combination of the graph's connectivity and community structure, selecting the groups of nodes that would either make the graph more connected if it's too dispersed or that would help maintain diversity if it's too connected.
These are the latent brokers between the topics: the nodes that have an unusually high rate of influence (betweenness centrality) to their freqency — meaning they may appear not as often as the most influential nodes but they are important narrative shifting points.
These are usually brokers between different clusters / communities of nodes, playing not easily noticed and yet important role in this network, like the "grey cardinals" of sorts.