Browsing Articles publicats (Matemàtica) by Title
Now showing items 264-283 of 329
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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 Publicaciones; Asociacion 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)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 ... -
Some remarks on global analytic planar vector fields possessing an invariant analytic set
(Taylor and Francis, 2021-02-01)We study the problem of determining the canonical form that a planar analytic vector field in all the real plane can have in order to possess a given invariant analytic set. We determine some conditions that guarantee that ... -
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 from regular partitions of Cayley (di)graphs of permutation groups
(Elsevier, 2020)In this paper, we present a method to obtain regular (or equitable) partitions of Cayley (di)graphs (that is, graphs, digraphs, or mixed graphs) of permutation groups on n letters. We prove that every partition of the ... -
Spectra and eigenspaces of arbitrary lifts of graphs
(Springer, 2021-09-23)We describe, in a very explicit way, a method for determining the spectra and bases of all the corresponding eigenspaces of arbitrary lifts of graphs (regular or not). -
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). -
Stochastic smoothing of point processes for wildlife-vehicle collisions on road networks
(Springer, 2021)Wildlife-vehicle collisions on road networks represent a natural problem between human populations and the environment, that affects wildlife management and raise a risk to the life and safety of car drivers. We propose ... -
Strongly formal Weierstrass non-integrability for polynomial differential systems in C2
(Bolyai Institute, University of Szeged; Hungarian Academy of Sciences, 2020)Recently a criterion has been given for determining the weakly formal Weierstrass non-integrability of polynomial differential systems in C2 . Here we extend this criterion for determining the strongly formal Weierstrass ...