Browsing by Title
Now showing items 1-20 of 2190
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25 años de Psykhe: Un análisis bibliométrico
Salas, Gonzalo
; ; Vega-Arce, Maribel ; ; ; Méndez-Bustos, Pablo ; (2017)
El objetivo del presente estudio fue realizar un análisis bibliométrico de Psykhe (1992-2016), considerando algunos elementos históricos que contextualizan su trayectoria, para describir sus principales características y ...
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4DGVF: Segmentation variationnelle pour images 3D multicomposantes
(2014)In this paper, we generalize the gradient vector flow field to vector-valued images. We base our method on the definition of a structure tensor that is calculated according to a blind estimation of contrast in the different ...
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A beta partial least squares regression model: Diagnostics and application to mining industry data
(2018)We propose a methodology based on partial least squares (PLS) regression models using the beta distribution, which is useful for describing data measured between zero and one. The beta PLS model parameters are estimated ...
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A Cardy-like formula for rotating black holes with planar horizon
(2017)We show that the semiclassical entropy of D−dimensional rotating (an)isotropic black holes with planar horizon can be successfully computed according to a Cardy-like formula. This formula does not refer to any central ...
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A case study on the effects of task-based learning approach on sixth grade learners’ oral competence
(Universidad Católica del Maule, Facultad de Ciencias de la Educación, 2018) -
A case study on the impact of cooperative-based learning activities in ESP learners
(Universidad Católica del Maule, Facultad de Ciencias de la Educación, 2018) -
A Cobb–Douglas type model with stochastic restrictions: Formulation, local influence diagnostics and data analytics in economics
(2019)We propose a methodology for modelling and influence diagnostics in a Cobb–Douglas type setting. This methodology is useful for describing case-studies from economics. We consider stochastic restrictions for the model based ...
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A comparative study of third year commercial and MINEDUC high school english textbooks with regard to the development of critical thinking skills in english
(Universidad Católica del Maule, Facultad de Ciencias de la Educación, 2014)El propósito de este proyecto es comparar los verbos de instrucción presentes en las actividades de dos textos de inglés, uno usado en un establecimiento público y otro en uno privado, con el fin de determinar el grado en ...
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A framework for building safe and effective school environments: Positive behavioral interventions and supports (PBIS)
(2018)Abstract: Schools throughout the world strive to establish safe and effective learning environments. One consistent challenge is student aggression, acting-out, withdrawal, and insubordination. The historic response to ...
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A method to construct fruit maturity color scales based on support machines for regression: Application to olives and grape seeds
Mora, Marco; ; ; ; Fredes, Claudio (2015)
Color scales are a powerful tool used in agriculture for estimate maturity of fruits. Fruit maturity is an important parameter to determine the harvest time. Typically, to obtain the maturity grade, a human expert visually ...
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A method to estimate grape phenolic maturity based on seed images
; Mora, Marco; Fredes, Claudio (2014)
The timing of the grape harvest has a strong impact on wine quality. A recent line of studies proposes visual seed inspection by a trained expert to determine Phenolic Maturity. In this paper a method is presented to ...
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A multi-directional gradient with bi-geometric calculus to detect contours in images with multiplicative noise
; Mora, Marco; (2018)
In this paper a new operator is presented for the detection of contours in images with multiplicative noise, by using the operations introduced in the bi-geometric calculus, since recent results in the literature show that ...
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A new class of differential equations with impulses at instants dependent on preceding pulses. Applications to management of renewable resources
Cordova-Lepe, Fernando; ; (2012)
In this paper, a new type of mathematical model to represent certain processes with impulsive dynamic behavior is introduced. The main assumption is that the next impulse time is determined by three fundamental elements: ...
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A new descriptor for person identity verification based on handwritten strokes off-line analysis
Mora, Marco; (2017)
A new descriptor for the verification of people’s identity through the analysis of handwritten text is presented. The proposed descriptor corresponds to a representation of the pattern of writing pressure computed from the ...
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A new genosensor for meningococcal meningitis diagnosis using biological samples
; ; ; ; ; Cuadros-Orellana, Sara; ; (2018)
In this work, a new electrochemical biosensor for DNA detection of bacterial meningitis is proposed. The system is based on specific DNA fragments from the Neisseria meningitidis genome as a probe incorporated on graphite ...
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A new genus and species of leaf miner (Lepidoptera, Gracillariidae) for Chile associated to the native tree Lithraea caustica
(2013)A new genus and species of leaf miner (Lepidoptera, Gracillariidae) for Chile associated to the native tree Lithraea caustica. We propose the new genus and species of Gracillariidae (Lepidoptera) Hualpenia lithraeophaga ...
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A non-Newtonian gradient for contour detection in images with multiplicative noise
Mora, Marco; Cordova-Lepe, Fernando ; (2012)
In this paper, a new operator for contour detection in images with multiplicative noise is presented. Traditional methods of edge detection, as those based in gradient operator or measures of variance, follow a logic and ...
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A preliminary investigation into the effects of active interferential current therapy and placebo on pressure pain sensitivity: A random crossover placebo controlled study
(2011)Objective (1) To determine the effect of active and placebo interferential current on muscle pain sensitivity using an experimental mechanically induced pain model. (2) To evaluate the predictive role of expectations, ...
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A proposal for innovation in the teaching of analysis and modeling of business process: Case UCM
Toranzo, Marco; ; (2018)
The reaccreditation of the career informatic engineering of the Universidad Católica del Maule left several lessons learned and challenges to improve the strategies and learning outcomes of the students, among them is the ...
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A pulse fishery model with closures as function of the catch: Conditions for sustainability
Cordova-Lepe, Fernando; ; (2012)
We present a model of single species fishery which alternates closed seasons with pulse captures. The novelty is that the length of a closed season is determined by the remaining stock size after the last capture. The ...