UPA Perpustakaan Universitas Jember

Analysing the sensitivity of nestedness detection methods

GRIMM 1.2,Alexander - Personal Name
J.TESSONE 1.2,Claudio - Personal Name

Many bipartite and unipartite real-world networks display a nested structure. Examples pervade different disciplines: biological ecosystems (e.g. mutualistic networks), economic networks (e.g. manufactures and contractors networks) to financial networks (e.g. bank lending networks), etc. A nested network has a topology such that a vertex’s neighbourhood contains the neighbourhood of vertices of lower degree; thus –upon
vertex reordering– the adjacency matrix is step-wise. Despite its strict mathematical definition and the interest triggered by their common occurrence, it is not easy to measure the extent of nested graphs unequivocally. Among others, there exist three methods for detection and quantification of nestedness that are widely used: BINMATNEST, NODF, and fitness-complexity metric (FCM). However, these methods fail
in assessing the existence of nestedness for graphs of low (NODF) and high (NODF, BINMATNEST) network density. Another common shortcoming of these approaches is the underlying assumption that all vertices belong to a nested component. However, many real-world networks have solely a sub-component (i.e. a subset of its vertices) that is nested. Thus, unveiling which vertices pertain to the nested component is an
important research question, unaddressed by the methods available so far. In this contribution, we study in detail the algorithm Nestedness detection based on Local Neighbourhood (NESTLON). This algorithm resorts solely on local information and detects nestedness on a broad range of nested graphs independently of their nature and density. Further, we introduce a benchmark model that allows us to tune the
degree of nestedness in a controlled manner and study the performance of different algorithms. Our results show that NESTLON out performs both BINMATNEST and NODF.

EB00000003103K Available

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E-Jurnal

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Subject(s)

Nestedness,
Networks,
Sensitivity,
BINMATNEST,
NODF

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Statement of Responsibility

Alexander Grimm 1.2, Claudio J.Tessone 1.2

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NPP. 3509212D1000001

Analysing the sensitivity of nestedness detection methods

GRIMM 1.2,Alexander - Personal NameJ.TESSONE 1.2,Claudio - Personal Name

Series Title

Call Number

Publisher

Collation

Language

ISBN/ISSN

Classification

Content Type

Media Type

Carrier Type

Edition

Subject(s)

Specific Detail Info

Statement of Responsibility

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GRIMM 1.2,Alexander - Personal Name
J.TESSONE 1.2,Claudio - Personal Name