Chelo Ferreira
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View article: Bagging and boosting machine learning algorithms for modelling sensory perception from simple chemical variables: Wine mouthfeel as a case study
Bagging and boosting machine learning algorithms for modelling sensory perception from simple chemical variables: Wine mouthfeel as a case study Open
View article: The Pearcey integral in the highly oscillatory region II
The Pearcey integral in the highly oscillatory region II Open
We consider the Pearcey integral for large values of and bounded values of . The standard saddle point analysis is difficult to apply because the Pearcey integral is highly oscillating in this region. To overcome this problem we use the mo…
View article: Deciphering Seasonal Patterns in Animal Feeding: A Mechanistic Approach to Analyzing the Restricted Growth of Iberian Pigs
Deciphering Seasonal Patterns in Animal Feeding: A Mechanistic Approach to Analyzing the Restricted Growth of Iberian Pigs Open
The growth of animals is influenced by various factors including genetics, nutrition, and environmental conditions. This study focuses on understanding the traditional growth phases of Iberian pigs raised in semi-free-range environments pr…
View article: Predictive variables of depressive symptoms and anxiety in older adults from primary care: a cross‐sectional observational study
Predictive variables of depressive symptoms and anxiety in older adults from primary care: a cross‐sectional observational study Open
Background By 2050, the number of people aged 60 years and older will have doubled worldwide and the most common mental disorders in this age group are currently depressive symptoms and anxiety. This study aimed to analyze the Basic and In…
View article: Exploring UPLC‐QTOF-MS‐based targeted and untargeted approaches for understanding wine mouthfeel: A sensometabolomic approach
Exploring UPLC‐QTOF-MS‐based targeted and untargeted approaches for understanding wine mouthfeel: A sensometabolomic approach Open
View article: New series expansions for the ℋ-function of communication theory
New series expansions for the ℋ-function of communication theory Open
TheH-function of communication theory plays an important role inthe error rate analysis in digital communication with the presenceof additive white Gaussian noise (AWGN) and generalized multipathfading conditions. In this paper we investig…
View article: Effects of cognitive stimulation program on cognition and mood in older adults, stratified by cognitive levels: A randomized controlled trial
Effects of cognitive stimulation program on cognition and mood in older adults, stratified by cognitive levels: A randomized controlled trial Open
View article: Uniform Convergent Expansions of the Error Function in Terms of Elementary Functions
Uniform Convergent Expansions of the Error Function in Terms of Elementary Functions Open
View article: Prediction of growth performance parameters in the growing and free-range finishing phases of the Iberian pig via meta-analysis
Prediction of growth performance parameters in the growing and free-range finishing phases of the Iberian pig via meta-analysis Open
Aim of study: To describe and predict mathematically the growth parameters of Iberian pigs. Area of study: Iberian dehesa agroforestry system. Southwest of Iberian Peninsula. Material and methods: A quantitative and systematic review was c…
View article: Sex-Moderated Socio-Labor Aspects as Mediators of a Cognitive Stimulation Program in Older Adults: Randomized Clinical Trial
Sex-Moderated Socio-Labor Aspects as Mediators of a Cognitive Stimulation Program in Older Adults: Randomized Clinical Trial Open
Cognitive stimulation is essential for successful aging. The influence of sex and socio-occupational elements on this area remains unknown. This study aimed to analyze the possible mediation of those elements in the effectiveness of a cogn…
View article: Exploring Uplc‐Qtof-Ms‐Based Targeted and Untargeted Approaches for Understanding Wine Mouthfeel: A Sensometabolomic Approach
Exploring Uplc‐Qtof-Ms‐Based Targeted and Untargeted Approaches for Understanding Wine Mouthfeel: A Sensometabolomic Approach Open
View article: An asymptotic expansion of the hyberbolic umbilic catastrophe integral
An asymptotic expansion of the hyberbolic umbilic catastrophe integral Open
View article: Asymptotic approximation of a highly oscillatory integral with application to the canonical catastrophe integrals
Asymptotic approximation of a highly oscillatory integral with application to the canonical catastrophe integrals Open
We consider the highly oscillatory integral for large positive values of w , , K and p positive integers with , and an entire function. The standard saddle point method is complicated and we use here a simplified version of this method int…
View article: A convergent version of Watson's lemma for double integrals
A convergent version of Watson's lemma for double integrals Open
A modification of Watson’s lemma for Laplace transforms ∞
\n0 f(t)
\ne−zt dt was introduced in [Nielsen, 1906], deriving a new asymptotic
\nexpansion for large |z| with the extra property of being convergent as well. Inspired in that idea,…
View article: Short-term memory, attention, and temporal orientation as predictors of the cognitive impairment in older adults: A cross-sectional observational study
Short-term memory, attention, and temporal orientation as predictors of the cognitive impairment in older adults: A cross-sectional observational study Open
Late-life cognitive decline ranges from the mildest cases of normal, age-related change to mild cognitive impairment to severe cases of dementia. Dementia is the largest global burden for the 21 st century welfare and healthcare systems. T…
View article: New recurrence relations for several classical families of polynomials
New recurrence relations for several classical families of polynomials Open
In this paper, we derive new recurrence relations for the following families of polynomials: nörlund polynomials, generalized Bernoulli polynomials, generalized Euler polynomials, Bernoulli polynomials of the second kind, Buchholz polynomi…
View article: Modeling grape taste and mouthfeel from chemical composition
Modeling grape taste and mouthfeel from chemical composition Open
View article: An assessment of voltammetry on disposable screen printed electrodes to predict wine chemical composition and oxygen consumption rates
An assessment of voltammetry on disposable screen printed electrodes to predict wine chemical composition and oxygen consumption rates Open
View article: The swallowtail integral in the highly oscillatory region III
The swallowtail integral in the highly oscillatory region III Open
We consider the swallowtail integral Ψ(x,y,z):=∫∞−∞ei(t5+xt3+yt2+zt)dt for large values of |z| and bounded values of |x| and |y|. The integrand of the swallowtail integral oscillates wildly in this region and the asymptotic analysis is sub…
View article: Analysis of singular one-dimensional linear boundary value problems using two-point Taylor expansions
Analysis of singular one-dimensional linear boundary value problems using two-point Taylor expansions Open
We consider the second-order linear differential equation (x2 − 1)y'' + f (x)y′ + g(x)y = h(x) in the interval (−1, 1) with initial conditions or boundary conditions (Dirichlet, Neumann or mixed Dirichlet–Neumann). The functions f, g and h…
View article: The swallowtail integral in the highly oscillatory region II
The swallowtail integral in the highly oscillatory region II Open
We analyze the asymptotic behavior of the swallowtail integral R ∞ −∞ e i(t 5+xt3+yt2+zt)dt for large values of |y| and bounded values of |x| and |z|. We use the simpli ed saddle point method introduced in [López et al., 2009]. With this m…
View article: Implantación de un Curso Cero virtual de Ciencias Básicas para Veterinaria en el Grado en Veterinaria de la Universidad de Zaragoza
Implantación de un Curso Cero virtual de Ciencias Básicas para Veterinaria en el Grado en Veterinaria de la Universidad de Zaragoza Open
La asignatura de Ciencias Básicas para Veterinaria es una asignatura obligatoria del Grado en Veterinaria de la Universidad de Zaragoza en la cual se imparten las materias de matemáticas, química y física. Los profesores de la asignatura s…
View article: The asymptotic expansion of the swallowtail integral in the highly oscillatory region
The asymptotic expansion of the swallowtail integral in the highly oscillatory region Open
View article: The use of two-point Taylor expansions in singular one-dimensional boundary value problems I
The use of two-point Taylor expansions in singular one-dimensional boundary value problems I Open
View article: Uniform representations of the incomplete beta function in terms of elementary functions
Uniform representations of the incomplete beta function in terms of elementary functions Open
We consider the incomplete beta function $B_{z}(a,b)$ in the maximum domain ofanalyticity of its three variables: $a,b,z\\\\in\\\\mathbb{C}$, $-a\\\\notin\\\\mathbb{N}$,$z\\\\notin[1,\\\\infty)$. For $\\\\Re b\\\\le 1$ we derive a converge…
View article: ASYMPTOTIC AND CONVERGENT EXPANSIONS FOR SOLUTIONS OF THIRD-ORDER LINEAR DIFFERENTIAL EQUATIONS WITH A LARGE PARAMETER
ASYMPTOTIC AND CONVERGENT EXPANSIONS FOR SOLUTIONS OF THIRD-ORDER LINEAR DIFFERENTIAL EQUATIONS WITH A LARGE PARAMETER Open
In previous papers [6–8,10], we derived convergent and asymptotic\nexpansions of solutions of second order linear differential equations with a\nlarge parameter. In those papers we generalized and developed special cases\nnot considered in…
View article: Resultados académicos de un sistema de evaluación continuada en Epidemiología y Bioestadística del Grado en Veterinaria
Resultados académicos de un sistema de evaluación continuada en Epidemiología y Bioestadística del Grado en Veterinaria Open
[ES] La adaptación al Espacio Europeo de Educación Superior exige la implementación de metodologías de aprendizaje activo; sin embargo, el número de estudiantes por curso requiere que se utilicen entornos…
View article: Orthogonal basis for the optical transfer function
Orthogonal basis for the optical transfer function Open
We propose systems of orthogonal functions qn to represent optical transfer functions (OTF) characterized by including the diffraction-limited OTF as the first basis function q0=OTFperfect. To this end, we …
View article: Erratum on “Orthogonal basis with a conicoid first mode for shape specification of optical surfaces”
Erratum on “Orthogonal basis with a conicoid first mode for shape specification of optical surfaces” Open
We found an error affecting the results presented in Figure 7 of our article "Orthogonal basis with a conicoid first mode for shape specification of optical surfaces". Here we publish the revised Fig. 7.
View article: Orthogonal basis with a conicoid first mode for shape specification of optical surfaces: reply
Orthogonal basis with a conicoid first mode for shape specification of optical surfaces: reply Open
We present some comments to the paper "Orthogonal basis with a conicoid first mode for shape specification of optical surfaces: comment."