Browsing Articles publicats (Matemàtica) by Title
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Limits of the Linear Accumulation Regime of DGT Sensors
(American Chemical Society, 2013)A key question for the practical application of DGT (Diffusive Gradients in Thin films) as dynamic sensors in the environmental monitoring of trace metals is the influence of pH and dissolved ligands over the linear ... 
Linearizability of planar polynomial Hamiltonian systems
(Elsevier, 2022)Isochronicity and linearizability of twodimensional polynomial Hamiltonian systems are revisited and new results are presented. We give a new computational procedure to obtain the necessary and sufficient conditions for ... 
Liouvillian integrability of a general RayleighDuffing oscillator
(Atlantis; Taylor & Francis, 2019)We give a complete description of the Darboux and Liouville integrability of a general RayleighDuffing oscillator through the characterization of its polynomial first integrals, Darboux polynomials and exponential factors. 
Looking back over their shoulders: a qualitative analysis of portuguese teachers' attitudes towards statistics
(International Association for Statistical Education, 2012)Teachers’ attitudes towards statistics can have a significant effect on their own statistical training, their teaching of statistics, and the future attitudes of their students. The influence of attitudes in teaching ... 
Magic coverings and the Kronecker product
(2014)In this paper we study a relationship existing among (super) magic coverings and the well known Kronecker product of matrices. We also introduce the concept of Znproperty for digraphs in order to study this relation ... 
Minimum tree decompositions with a given tree as a factor
(Combinatorial Mathematics Society of Australasia, 2005)A tree decomposition of a graph G is a family of subtrees whose sets of edges partition the set of edges of G. In this paper we are interested in the structure of the trees involved in tree decompositions with the minimum ... 
Mixed Moore Cayley graphs
(Elsevier, 20140901)Cayley graphs are well known objects with interesting properties, also in the context of Moore graphs and digraphs. In $1978$ Bos\'ak extended Moore's property to the mixed setting (with arcs allowed along with edges), in ... 
Mobile terrestrial laser scanner applications in precision fruticulture/ horticulture and tools to extract information from canopy point clouds
(Springer Science+Business Media, 20170101)LiDAR sensors are widely used in many areas and, in recent years, that includes agricultural tasks. In this work, a selfdeveloped mobile terrestrial laser scanner based on a 2D light detection and ranging (LiDAR) sensor ... 
Modeling inertia through the interaction with quantum fluctuations
(Elsevier, 2021)The origin of inertia of macroscopic bodies has never been thoroughly elucidated. In this paper we provide a new explanation based on the following assumptions: (i) we can think of any body as being composed by resonant ... 
Modeling of Vaccination and Contact Tracing as Tools to Control the COVID19 Outbreak in Spain
(MDPI, 2021)We developed an agentbased stochastic model, based on P Systems methodology, to decipher the effects of vaccination and contact tracing on the control of COVID19 outbreak at population level under different control ... 
Modeling road traffic safety based on point patterns of wildlifevehicle collisions
(Elsevier, 2022)Wildlifevehicle collisions represent one of the main coexistence problems that appear between human populations and the environment. In general terms, this affects road safety, wildlife management, and the building of ... 
Modeling tactical planning decisions through a linear optimization model in sow farms
(Elsevier, 2012)This paper deals with tactical planning decisions for breeding farms producing piglets through a linear optimization model. A mediumterm planning horizon based on weekly periods is considered. The proposed model maximizes ... 
Modeling the consequences of the demise and potential recovery of a keystonespecies: wild rabbits and avian scavengers in Mediterranean landscapes
(Nature Publishing Group, 2015)Restoration of demised keystonespecies populations is an overriding concern in conservation biology. However, since no population is independent of its environment, progress is needed in predicting the efficacy of restoration ... 
Modelling the effects of sanitary policies on European vulture conservation
(Nature Publishing Group, 2012)Biodiversity losses are increasing as a consequence of negative anthropogenic effects on ecosystem dynamics. However, the magnitude and complexity of these effects may still be greatly underestimated. Most Old World ... 
Modelling the SARSCOV2 outbreak: assessing the usefulness of protective measures to reduce the pandemic at population level
(Elsevier, 2021)A new bioinspired computational model was developed for the SARSCoV2 pandemic using the available epidemiological information, highresolution population density data, travel patterns, and the average number of contacts ... 
Modified inertia from extended uncertainty principle(s) and its relation to MoND
(Springer, 2020)In this paper we show that Modified Inertia, i.e., the modification of inertia predicted by some alternative theories of gravity at cosmic scales, can be naturally derived within the framework of the extended uncertainty ... 
Modified inertial mass from information loss
(World Scientific Publishing, 2017)A modification of inertia (called MiHsC or quantized inertia) has been proposed that assumes that inertia is caused by Unruh radiation, and that this radiation is made inhomogeneous in space by either Rindler horizons ... 
Network reliability in hamiltonian graphs
(Elsevier, 2021)The reliability polynomial of a graph gives the probability that a graph remains operational when all its edges could fail independently with a certain fixed probability. In general, the problem of finding uniformly most ... 
New constructions for the nqueens problem
(Springer, 202002)Let D be a digraph, possibly with loops. A queen labeling of D is a bijective function l:V(G)⟶{1,2,…,V(G)} such that, for every pair of arcs in E(D), namely (u, v) and (u′,v′) we have (i) l(u)+l(v)≠l(u′)+l(v′) and (ii) ... 
New cyclic Kautz digraphs with optimal diameter
(University of Calgary, 20211231)We obtain a new family of digraphs with minimal diameter, that is, given the number of vertices and outdegree, there is no other digraph with a smaller diameter. This new family of digraphs are called `modified cyclic ...