In this paper we categorize dynamical regimes demonstrated by starlike networks with chaotic nodes. This analysis is done in view of further studying of chaotic scale-free networks, since a starlike structure is the main motif of them. We analyze starlike networks of Hénon maps. They are found to demonstrate a huge diversity of regimes. Varying the coupling strength we reveal chaos, quasiperiodicity, and periodicity. The nodes can be both fully and phase synchronized. The hub node can be either synchronized with the subordinate nodes or oscillate separately from fully synchronized subordinates. There is a range of wild multistability where the zoo of regimes is the most various. One can hardly predict here even a qualitative nature of the expected solution, since each perturbation of the coupling strength or initial conditions results in a new character of dynamics.
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http://dx.doi.org/10.1103/PhysRevE.92.042912 | DOI Listing |
J Theor Biol
February 2025
Department of Mathematics, University of Sussex, Brighton, United Kingdom; Department of Infectious Disease Epidemiology, School of Public Health, Imperial College London, London, United Kingdom. Electronic address:
An individual-based stochastic model was developed to simulate the spread of an infectious disease in an SEIR-type system on all possible contact-networks of size between six and nine nodes. We assessed systematically the impact of the change in the population contact structure on four important epidemiological quantities: i) the epidemic duration, ii) the maximum number of infected individuals at a time point during the epidemic, iii) the time at which the maximum number of infected individuals is reached, and iv) the total number of individuals that have been infected during the epidemic. We considered the potential relationship of these quantities as the network changes and identified the networks that maximise and minimise each of these in the case of an epidemic outbreak.
View Article and Find Full Text PDFSoft Matter
December 2024
Dipartimento di Chimica "Ugo Schiff", Università di Firenze, Sesto Fiorentino (FI) 50019, Italy.
We investigate the link between the internal microstructure of poly(-isopropylacrylamide)-poly(ethylene glycol) methyl ether methacrylate (PNIPAM-PEGMA) microgels, their bulk moduli and the rheological response and structural arrangement in dense suspensions. The low degree of crosslinking combined with the increased hydrophilicity induced by the presence of PEGMA results in a diffuse, star-like density profile of the particle and very low values of the bulk modulus in dilute conditions, as determined by small angle neutron scattering (SANS). The ultrasoft nature of the particle is reflected in the changes of the structural arrangement in dense suspensions, which evidence a strong deswelling and a sharp rise of the bulk modulus at moderate packing fractions.
View Article and Find Full Text PDFGenes Genomics
November 2024
Department of Biology, Soonchunhyang University, Asan, 31538, Republic of Korea.
Mitochondrial DNA A DNA Mapp Seq Anal
November 2024
Institute of Environment Sciences, Boğaziçi University, Istanbul, Türkiye.
The bottlenose dolphin is a widely distributed species found in temperate waters, including the Mediterranean and Black Seas. The Black Sea population is recognized as a distinct subspecies, , due to genetic and morphological differences. This study analyzed mitochondrial DNA (mtDNA) sequences of 73 bottlenose dolphin samples collected between 1999 and 2016 along the Turkish Black Sea coast, Turkish Straits System (TSS), Aegean, and Mediterranean Seas revealing 14 haplotypes, eight of which are reported here for the first time.
View Article and Find Full Text PDFPolymers (Basel)
October 2024
Department of Mechanical Engineering, Kaunas University of Technology, Studentu St. 56, 51424 Kaunas, Lithuania.
This study is aimed at developing a fibre-reinforced polymer composite with a high bio-based content and to investigate its mechanical properties. A novel basalt fibre-reinforced polymer (BFRP) composite with bio-based matrix modified with different contents of star-like n-butyl methacrylate (-BMA) block glycidyl methacrylate (GMA) copolymer has been developed. -BMA blocks have flexible butyl units, while the epoxide group of GMA makes it miscible with the epoxy resin and is involved in the crosslinking network.
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