1,354,753 research outputs found
Editorial: Ecological complex systems
No full text87.18.-h Biological complexity, 87.18.Tt Noise in biological systems, 87.23.Cc Population dynamics and ecological pattern formation, 87.19.-j Properties of higher organisms,
A vision of eternity
No full textA vision of eternityBookanista Review of The Typographic Dante by Mika Provata-Carlonehttp://bookanista.com/vision-eternity/</p
A vision of eternity
No full textA vision of eternityBookanista Review of The Typographic Dante by Mika Provata-Carlonehttp://bookanista.com/vision-eternity/</p
Bookanista – A vision of eternity
No full textReview of The Typographic Dante exhibition at London's South Bank Centre. Written by Mika Provata-Carlone for the Bookanista website</p
Bookanista – A vision of eternity
No full textReview of The Typographic Dante exhibition at London's South Bank Centre. Written by Mika Provata-Carlone for the Bookanista website</p
Rinnovazione del dibattimento e "provata condotta illecita"
No full textL’Autore commenta una recente decisione con cui la Cassazione ha escluso la necessità di rinnovare il dibattimento in caso di rivalutazione di un atto d’indagine acquisito a dibattimento di primo grado per ‘‘provata condotta illecita’’ (art. 500, 4o comma, c. p.p.). Tematizzando gli argomenti alla base della soluzione prescelta, vengono tratteggiati i rapporti tra regola ed eccezioni al contraddittorio nella formazione della prova in appello, misurandone la resistenza rispetto al canone europeo del diritto al confront
Amplitude chimeras and bump states with and without frequency entanglement: a toy model
No full textWhen chaotic oscillators are coupled in complex networks a number of interesting synchronization phenomena emerge. Notable examples are the frequency and amplitude chimeras, chimera death states, solitary states as well as combinations of these. In a previous study (Provata 2020 J. Phys. Complex. 1 025006), a toy model was introduced addressing possible mechanisms behind the formation of frequency chimera states. In the present study a variation of the toy model is proposed to address the formation of amplitude chimeras. The proposed oscillatory model is now equipped with an additional 3rd order equation modulating the amplitude of the network oscillators. This way, the single oscillators are constructed as bistable in amplitude and depending on the initial conditions their amplitude may result in one of the two stable fixed points. Numerical simulations demonstrate that when these oscillators are nonlocally coupled in networks, they organize in domains with alternating amplitudes (related to the two fixed points), naturally forming amplitude chimeras. A second extension of this model incorporates nonlinear terms merging amplitude together with frequency, and this extension allows for the spontaneous production of composite amplitude-and-frequency chimeras occurring simultaneously in the network. Moreover the extended model allows to understand the emergence of bump states via the continuous passage from chimera states, when both fixed point amplitudes are positive, to bump states when one of the two fixed points vanishes. The synchronization properties of the network are studied as a function of the system parameters for the case of amplitude chimeras, bump states and composite amplitude-and-frequency chimeras. The proposed mechanisms of creating domains with variable amplitudes and/or frequencies provide a generic scenario for understanding the formation of the complex synchronization phenomena observed in networks of coupled nonlinear and chaotic oscillators
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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