Resultats globals: 9 registres trobats en 0.02 segons.
Articles, 8 registres trobats
Contribucions a jornades i congressos, 1 registres trobats
Articles 8 registres trobats  
1.
12 p, 928.9 KB Demographic transitions and socioeconomic development in Italy, 1862-2009 : a brief overview / Salvati, Luca (Council of Agricultural Research and Economics (CREA). Research Centre for Forestry and Wood) ; Carlucci, M. (Sapienza Università di Roma. Dipartimento di Scienze Sociali ed Economiche) ; Serra Ruiz, Pere (Universitat Autònoma de Barcelona. Departament de Geografia) ; Zambon, Ilaria (Università degli studi della Tuscia. Dipartimento per l'Innovazione nei sistemi Biologici, Agroalimentari e Forestali)
The present study investigates long-term population dynamics in Italy, 1862-2009, in light of Demographic Transitions (DTs). Under the assumption that DTs are multidimensional processes of change involving several aspects, including population structure and dynamics, an exploratory analysis was carried out in this study to verify temporal coherency of 15 indicators in Italy, identifying homogeneous time periods with distinct demographic characteristics. [...]
2019 - 10.3390/su11010242
Sustainability, Vol. 11, núm. 1 (june 2019) , p. 242  
2.
23 p, 2.3 MB Stochastic multi-scale models of competition within heterogeneous cellular populations : Simulation methods and mean-field analysis / Cruz Moreno, Roberto de la (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Guerrero Contreras, Pilar (University College London. Department of Mathematics) ; Spill, Fabian (Boston University. Department of Biomedical Engineering) ; Alarcón Cor, Tomás (Centre de Recerca Matemàtica)
We propose a modelling framework to analyse the stochastic behaviour of heterogeneous, multi-scale cellular populations. We illustrate our methodology with a particular example in which we study a population with an oxygen-regulated proliferation rate. [...]
2016 - 10.1016/j.jtbi.2016.07.028
Journal of theoretical biology, Vol. 407 (Oct. 2016) , p. 161-183  
3.
17 p, 3.0 MB Changes in the natural dynamics of Nothofagus dombeyi forests : population modeling with increasing drought frequencies / Molowny-Horas, Roberto (Centre de Recerca Ecològica i Aplicacions Forestals) ; Suárez, Maria Laura (Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas) ; Lloret Maya, Francisco (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia)
Drought-induced episodes of tree mortality can determine forest dynamics and structure, particularly in forests dominated by single species. Short- and mid-term climate projections indicate that strong changes in annual precipitation may strike more often in northern Patagonia. [...]
2017 - 10.1002/ecs2.1708
Ecosphere, Vol. 8, issue 3 (March 2017) , e01708
3 documents
4.
13 p, 280.0 KB Simultaneous periodic orbits bifurcating from two zero-Hopf equilibria in a tritrophic food chain model / Castellanos, Víctor (UJAT(México).Division Académica de Ciencias Básicas) ; Llibre, Jaume (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Quilantán, Ingrid (UJAT(México).Division Académica de Ciencias Básicas)
We are interested in the coexistence of three species forming a tritrophic food chain model. Considering a linear grow for the lowest trophic species or prey, and a type III Holling functional response for the middle and highest trophic species (first and second predator respectively). [...]
2013 - 10.4236/jamp.2013.17005
Journal of Applied Mathematics and Physics, Vol. 1 (2013) , p. 31-38  
5.
23 p, 585.6 KB Delayed logistic population models revisited / Liz, Eduardo (Universidad de Vigo. Departamento de Matematica Aplicada II)
We discuss the global dynamics of some logistic models governed by delay-differential equations. We focus on models of exploited populations, and study the changes in the dynamics as the harvesting effort is increased. [...]
2014 - 10.5565/PUBLMAT_Extra14_17
Publicacions matemàtiques, Vol. Extra, Núm. (2014) , p. 309-331  
6.
11 p, 448.0 KB A stable temperature may favour continuous reproduction by Theodoxus fluviatilis and explain its high densities in some karstic springs / Graça, Manuel A. S. (University of Coimbra. Department of Life Sciences) ; Serra, Sónia R. Q. (University of Coimbra. Department of Life Sciences) ; Ferreira, Verónica (University of Coimbra. Department of Life Sciences) ; University of Coimbra. IMAR-CMA and Department of Life Sciences
Theodoxus fluviatilis is a common gastropod in many karstic springs in central Portugal. We investigated the possible reasons for the near-total restriction of this species to these springs. We first determined the spatial distribution of the species within a spring (Anços) and related the densities at sampling-patch scales to selected physical and chemical variables. [...]
Theodoxus fluviatilis es un gasterópodo común en muchas de los manantiales kársticos del centro de Portugal. La pregunta a la que intentamos responder es ¿por qué la especie está prácticamente restricta a los manantiales? Para ello determinamos primero la distribución espacial de T. [...]

2012
Limnética, Vol. 31, Núm. 1 (2012) , p. 129-140  
7.
16 p, 784.9 KB La mobilitat quotidiana a la regió metropolitana de Barcelona / Miralles-Guasch, Carme, 1961- (Universitat Autònoma de Barcelona. Departament de Geografia) ; Oliver Frauca, Laia (Universitat Autònoma de Barcelona. Departament de Geografia)
Carme Miralles-Guasch i Laia Oliver-Frauca analitzen els hàbits de mobilitat de la regió metropolitana de Barcelona, on el patró de mobilitat no només és determinat per les característiques territorials i l'oferta d'infraestructures i serveis de transport existent, sinó que també és fortament condicionat pels trets personals de cada individu i de cada col·lectiu.
2008
Papers : Regió Metropolitana de Barcelona : Territori, estratègies, planejament, N. 48 (2008) p. 12-27
3 documents
8.
12 p, 73.5 KB Patrones espaciales de tamaño y mortalidad del roble (Quercus robur L.) en un bosque del litoral de Cantabria / Rozas, Vicente (Universidad de Oviedo. Departamento de Biología de Organismos y Sistemas) ; Fernández Prieto, José A. (Instituto de Recursos Naturales y Ordenación del Territorio (Oviedo, Astúries))
La descripción e interpretación de los patrones espaciales de los árboles permite extraer conclusiones sobre los factores que condicionan tanto el establecimiento de las cohortes como su variación temporal. [...]
Quantitative spatial analysis provide inferences on tree population dynamics. Spatial patterns of pedunculate oak (Quercus robur L. ) in two forest plots were analysed in this work. Significative evidences of clumping for trees of smaller sizes and a random pattern for larger-sized ones were given. [...]

1998
Orsis : Organismes i Sistemes, V. 13 (1998) , p. 79-90  

Contribucions a jornades i congressos 1 registres trobats  
1.
4 p, 280.7 KB Demographic agent-based simulation of gambians immigrants in Spain / Montañola-Sales, Cristina (Universitat Politècnica de Catalunya. Departament d'Estadística i Investigació Operativa) ; Casanovas Garcia, Josep (Universitat Politècnica de Catalunya. Departament d'Estadística i Investigació Operativa) ; Kaplan Marcusán, Adriana (Universitat Autònoma de Barcelona. Departament d'Antropologia Social i Cultural) ; Cela-Espín, Jose Maria (Universitat Politècnica de Catalunya. Departament d'Arquitectura de Computadors)
Changes in our society have created a challenge for policymakers, who confront a need of tools to evaluate the possible effects of their policies. Agent-based modelling and simulation is a promising methodology which can be used in the study of population dynamics. [...]
2014
Social Simulation Conference. Bellaterra, Cerdanyola del Vallès, 1a : 2014  

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