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  • Publication details - IFISC
    particular models of interest in economy and epidemiology We show that particle heterogeneity can enhance or decrease the size of the collective fluctuations depending on the system and that it is possible to infer the degree and the form of the heterogeneity distribution in the system by measuring only global variables and their fluctuations Our work shows that in some cases heterogeneity among the units composing a system can be

    Original URL path: http://ifisc.uib-csic.es/publications/publication-detail.php?indice=2387 (2016-02-15)
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  • Publication details - IFISC
    system in terms of delays Technical operational or meteorological issues affecting some flights give rise to primary delays When operations continue such delays can propagate magnify and eventually involve a significant part of the network We define metrics able to quantify the level of network congestion and introduce a model that reproduces the delay propagation patterns observed in the U S performance data Our results indicate that there is a

    Original URL path: http://ifisc.uib-csic.es/publications/publication-detail.php?indice=2384 (2016-02-15)
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  • Publication details - IFISC
    developing a model that combined models of patch growth patch survival in seagrass planting projects and estimates of seagrass CO2 sequestration per unit area for the five seagrass species commonly used in restoration programs The model was initiated with planting units of 1 m2 and assumed a time lag of two years for these planting units to start sequestering carbon The model results indicated that the cumulative C sequestered increased rapidly over time and with planting density to reach an asymptote at a planting density of 100 units per ha or 6 m spacing between units At this planting density the modeled cumulative C sequestered ranges from 177 to over 1337 tons CO2 ha 1 after 50 years The value corresponding to this carbon sequestration suggests that the costs of seagrass restoration programs may be fully recovered by the total CO2 captured in societies with a carbon tax in place providing additional ecosystem services derived from the role of seagrasses in providing ecosystem services such as enhanced biodiversity Seagrass restoration programs are economically viable strategies to mitigate climate change particularly in subtropical and tropical island states where land based options have a limited scope DOI 10 1111 1365 2664 12155

    Original URL path: http://ifisc.uib-csic.es/publications/publication-detail.php?indice=2346 (2016-02-15)
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  • Publication details - IFISC
    quantum dot system in an external magnetic field for the observation of the SU 3 Kondo effect identified by the conductance being pinned to a characteristic value of 3 4 of the unitary limit The Kondo effect occurs in two plateaus where the dot occupancy is pinned to an integer value either 1 or 2 We discuss the thermodynamic and spectral properties of the corresponding triple impurity model and establish how the presence of SU 3 Kondo screening can be identified in the temperature dependence of the conductance through one of the dots We report results about the robustness of the SU 3 Kondo effect against various perturbations present in real experimental setups namely unequal reservoir dot tunneling couplings gating effects and nonvanishing interdot tunneling rates Finally we describe possible mechanisms to restore the SU 3 Kondo physics by properly tuning the on site dot potentials We briefly comment on the spinful case i e the same system in the absence of the magnetic field which has very different behavior and shows Kondo plateaus in conductance for all integer values of the occupancy including at the particle hole symmetric point DOI 10 1103 PhysRevB 87 035135 Fitxers Tornar a la

    Original URL path: http://ifisc.uib-csic.es/publications/publication-detail.php?indice=2507 (2016-02-15)
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  • Publication details - IFISC
    on the diversity of these strategies social connectivity and relative contribution of sector specific investments to production Four types of environmental dynamics are examined that differ in how gradual and how frequently the environment changes Numerical analysis shows how the socially optimal level of diversity increases with the frequency and speed of environmental change When there is uncertainty about the specific type of environmental dynamics whether for lack of data

    Original URL path: http://ifisc.uib-csic.es/publications/publication-detail.php?indice=2371 (2016-02-15)
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  • Publication details - IFISC
    a system of five ordinary differential equations to simulate the interactions between normal cells cancer cells endothelial cells chemotherapy agent and anti angiogenic agent in tumour growth is developed By a partial analysis of the cancer free subspace it is shown how the anti angiogenic agent may help the chemotherapy agent in controlling the cancer This is illustrated by numerical examples and bifurcation diagrams DOI 10 1016 j nonrwa 2012

    Original URL path: http://ifisc.uib-csic.es/publications/publication-detail.php?indice=2066 (2016-02-15)
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  • Publication details - IFISC
    the ones that correspond to using either Shannon s or Tsallis entropies in the concomitant variational problem It is shown that the two variations lead to equivalent solutions that have different appearances but contain the same information These solutions are linked by our transformation However the so called collision entropy Tsallis one with q 2 does not have a Shannon counterpart DOI 10 1016 j physa 2012 12 037 Fitxers

    Original URL path: http://ifisc.uib-csic.es/publications/publication-detail.php?indice=2529 (2016-02-15)
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  • Publication details - IFISC
    and population dynamics of the 50 Spanish provinces more than 8000 municipalities in a time window of 15 years 1996 2010 We exhibit compelling evidence regarding how well the MaxEnt principle describes the equilibrium distributions We show that the microscopic dynamics that governs population growth is the deciding factor that originates the observed macroscopic distributions The connection between microscopic dynamics and macroscopic distributions is unravelled via MaxEnt DOI 10 1098

    Original URL path: http://ifisc.uib-csic.es/publications/publication-detail.php?indice=2533 (2016-02-15)
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