Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Complex Networks Approach to Find Latent Clusters of Terrorist Groups   Given the extreme heterogeneity of actors and groups participating in
terrorist actions, investigating and assessing their characteristics can be
important to extract relevant information and enhance the knowledge on their
behaviors. The present work will seek to achieve this goal via a complex
networks approach. This approach will allow finding latent clusters of similar
terror groups using information on their operational characteristics.
Specifically, using open access data of terrorist attacks occurred worldwide
from 1997 to 2016, we build a multi-partite network that includes terrorist
groups and related information on tactics, weapons, targets, active regions. We
propose a novel algorithm for cluster formation that expands our earlier work
that solely used Gower's coefficient of similarity via the application of Von
Neumann entropy for mode-weighting. This novel approach is compared with our
previous Gower-based method and a heuristic clustering technique that only
focuses on groups' ideologies. The comparative analysis demonstrates that the
entropy-based approach tends to reliably reflect the structure of the data that
naturally emerges from the baseline Gower-based method. Additionally, it
provides interesting results in terms of behavioral and ideological
characteristics of terrorist groups. We furthermore show that the
ideology-based procedure tends to distort or hide existing patterns. Among the
main statistical results, our work reveals that groups belonging to opposite
ideologies can share very common behaviors and that Islamist/jihadist groups
hold peculiar behavioral characteristics with respect to the others.
Limitations and potential work directions are also discussed, introducing the
idea of a dynamic entropy-based framework.

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The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph