Browsing Articles publicats (Matemàtica) by Title
Now showing items 192-211 of 244
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Rainbow eulerian multidigraphs and the product of cycles
(DMTCS, 2016)An arc colored eulerian multidigraph with $l$ colors is rainbow eulerian if there is an eulerian circuit in which a sequence of $l$ colors repeats. The digraph product that refers the title was introduced by Figueroa-Centeno ... -
Rendimiento matemático en contextos bilingües: análisis de la incidencia de algunas variables del contexto socio-educativo
(Universidad de Murcia. Servicio de PublicacionesAsociacion Interuniversitaria de Investigacion Pedagógica (AIDIPE), 2003)El trabajo que se presenta en este artículo se sitúa en el contexto bilingüe de la provincia de Lleida en la que coexisten dos lenguas en contacto, el catalán y el castellano, si bien existe un predominio de uso familiar ... -
Repairing an aggregation-based smart metering system
(Springer Berlin Heidelberg, 2019-04-05)Smart meters inform the electricity suppliers about the consumption of their clients in short intervals. Fine-grained electricity consumption information is highly sensitive as it has been proven to permit to infer people's ... -
Reversible nilpotent centers with cubic homogeneous nonlinearities
(Elsevier, 2016)We provide 13 non--topological equivalent classes of global phase portraits in the Poincaré disk of reversible cubic homogeneous systems with a nilpotent center at origin, which complete the classification of the phase ... -
Review of mathematical models for sow herd management
(Elsevier, 2007)This paper is a survey of the different sow models described in literature, which made use of different mathematical methodologies, and were intended for sow herd management. Models were discussed under a wide classification, ... -
Searching for large multi-loop networks
(Elsevier, 2014)We describe and implement a computer-based method to find large multi-loop graphs with given degree and diameter. For some values of degree and diame- ter, our algorithm produces the largest known circulant graphs. We ... -
Secure many-to-one communications in wireless sensor networks
(Molecular Diversity Preservation International (MDPI), 2009)Wireless Sensor Networks (WSN) are formed by nodes with limited computational and power resources. WSNs are finding an increasing number of applications, both civilian and military, most of which require security for the ... -
Securing Databases by using Diagonal-based Order Preserving Symmetric Encryption
(Natural Sciences Publishing, 2014)The amount of information stored in databases is constantly increasing. Databases contain multiple records, each of them divided in several data fields. And some of these fields may contain sensitive information, so there ... -
Sequence Mixed Graphs
(Elsevier, 2017)A mixed graph can be seen as a type of digraph containing some edges (or two opposite arcs). Here we introduce the concept of sequence mixed graphs, which is a generalization of both sequence graphs and iterated line ... -
Sex-related differences in body condition and serum biochemical parameters in red deer (Cervus elaphus) naturally infected with Mycobacterium bovis
(Elsevier, 2013)Although Mycobacterium bovis infection is commonly reported in red deer (Cervus elaphus), potential differences in the effects of infection on male and female animals in terms of body condition and clinical biochemistry ... -
Small cutsets in arc-transitive digraphs of prime degree
(Elsevier, 2013)We give an upper bound for the size of non-trivial sets that have small boundary in a family of arc-transitive digraphs. We state the exact size for these sets in case of prime degree. We also give a lower bound for the ... -
Space–time trends in Spanish bird electrocution rates from alternative information sources
(Elsevier, 2015)Interaction with man-made infrastructures is one of the main sources of non-natural bird mortality. Here, we use a long-term study (1980–2010) to analyse spatial and temporal patterns in avian electrocution in Spain, using ... -
Spatio-temporal configurations of human-caused fires in Spain through point patterns
(MDPI, 2016)Human-caused wildfires are often regarded as unpredictable, but usually occur in patterns aggregated over space and time. We analysed the spatio-temporal configuration of 7790 anthropogenic wildfires (2007–2013) in nine ... -
Spectra and eigenspaces of arbitrary lifts of graphs
(Faculty of Mathematics, Physics and Informatics, Comenius University, 2019)We describe, in a very explicit way, a method for determining the spec-tra and bases of all the corresponding eigenspaces of arbitrary lifts of graphs (regularor not). -
Sufficient conditions for a digraph to admit a (1,≤ℓ)-identifying code
(University of Zielona Góra, 2019)A (1, ≤ `)-identifying code in a digraph D is a subset C of vertices of D such that all distinct subsets of vertices of cardinality at most ` have distinct closed in-neighbourhoods within C. In this paper, we give some ... -
Super edge-magic models
(Springer, 2011)In this paper, we generalize the concept of super edge-magic graph by introducing the new concept of super edge-magic models. -
Synthetic generation of social network data with endorsements
(Palgrave Macmillan, 2014)In many simulation studies involving networks there is the need to rely on a sample network to perform the simulation experiments. In many cases, real network data is not available due to privacy concerns. In that case we ... -
The (∆,D) and (∆,N) problems in double-step digraphs with unilateral distance
(Indonesian Combinatorial Society (InaCombS); Graph Theory and Applications (GTA) Research Centre; University of Newcastle, Australia; Institut Teknologi Bandung (ITB), Indonesia, 2014)We study the (Delta,D) and (Delta,N) problems for double-step digraphs considering the unilateral distance, which is the minimum between the distance in the digraph and the distance in its converse digraph, obtained by ... -
The 2-adic valuation of the cardinality of Jacobians of genus 2 curves over quadratic towers of finite fields
(World Scientific Publishing, 2018)Given a genus 2 curve C defined over a finite field Fq of odd characteristic such that 2|#Jac(C)(Fq), we study the growth of the 2-adic valuation of the cardinality of the Jacobian over a tower of quadratic extensions of ... -
The center problem and composition condition for Abel differential equations
(Elsevier, 2015)The classical Poincaré center-focus problem for planar polynomial systems of ordinary differential equations can be transformed, in certain particular cases, to the center problem of a trigonometric Abel differential ...