Browsing by Title
Now showing items 21-40 of 3172
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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 new method for evaluating knowledge, beliefs, and neuromyths about the mind and brain among italian teachers
(2020)Teachers often face situations that require them to apply knowledge about the mind and brain to education. Past studies have indicated that even if teachers show interest in cognitive neuroscience, they show high rates of ...
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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 ...
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A replacement name for Hualpenia Mundaca, Parra & Vargas (Lepidoptera, Gracillariidae)
(2013)A replacement name for Hualpenia Mundaca, Parra & Vargas (Lepidoptera, Gracillariidae). Vihualpenia nom. nov. is proposed as a replacement name for Hualpenia Mundaca, Parra & Vargas, 2013 (Lepidoptera, Gracillariidae), in ...
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A review of convolutional neural network applied to fruit image processing
; Mora, Marco; ; Barrientos, Ricardo ; Fredes, Claudio ; (2020)
Agriculture has always been an important economic and social sector for humans. Fruit production is especially essential, with a great demand from all households. Therefore, the use of innovative technologies is of vital ...
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A simple Gause‐type predator–prey model considering social predation
; ; Rojas, Alejandro (2019)
The consumer–resource relationships are among the most fundamental of all ecological relationships and have been the focus of ecology since its beginnings. Usually are described by nonlinear differential equation systems, ...
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A simultaneous blow-up problem arising in tumor modeling
(2019)Although macrophages are part of the human immune system, it has been remarkably observed in laboratory experiments that decreasing its number can slow down the tumor progression. We analyze through a recently mathematical ...
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A study of the cis–trans isomerization preference of N-alkylated peptides containing phosphorus in the side chain and backbone
(2019)The current work provides a study on the cis–trans isomerization behaviour of N-alkylated peptides decorated with phosphonate ester groups. A Ugi four-component reaction was chosen for the synthesis of N-alkylated peptides, ...
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A tradeoff between fitness‐related traits mask facilitation in a semiarid ecosystem
(2020)In stressful environments, a nurse plant can ameliorate harsh biotic and abiotic conditions for another plant species that grows within its canopy. This canopy can act as a barrier for herbivores, reducing damage to the ...
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A VLC channel model for underground mining environments with scattering and shadowing
(2020)Underground mining is an industry that preserves the miners' safety and efficiency in their work using wireless communication systems as a tool. In addition to communication links characterized by radio frequency signals, ...
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Abandono docente en américa latina: revisión de la literatura
; ; Precht Gandarillas, Andrea; (2020)
La cantidad de docentes que deciden abandonar el aula antes de cumplir cinco años de experiencia es una preocupación creciente a nivel internacional. Para contribuir a la discusión, este estudio realiza una revisión ...
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ABCB1/4 gallbladder cancer risk variants identified in India also show strong effects in Chileans
; ; ; ; ; ; ; ; ; ; Rojas, Armando; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; (2020)
Background: The first large-scale genome-wide association study of gallbladder cancer (GBC) recently identified and validated three susceptibility variants in the ABCB1 and ABCB4 genes for individuals of Indian descent. ...
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Abordaje de la disfunción física en la formación inicial de profesionales de kinesiología/fisioterapia
(2020)El ensayo identifica los factores estructurales del poder gubernamental que enfrentan las personas con disfunción física PDF). Se integra al análisis la formación tradicional que reciben profesionales de la kinesiología/ ...
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Abordaje psicológico del covid-19: una revisión narrativa de la experiencia latinoamericana
; ; Salas, Gonzalo; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; (2020)
Ante la rápida expansión del nuevo coronavirus (COVID-19) en todo el planeta, este artículo presenta un conjunto de propuestas elaboradas por psicólogas y psicólogos de América Latina que buscan abordar este fenómeno desde ...