Application of the entropy of approximation for the nonlinear characterizationin patients with Chagas disease

Chagas disease American trypanosomiasis is caused by a flagellated parasite: Trypanosoma cruzi, transmitted by an insect of the genus Triatoma and also by blood transfusions. In Latin America, the number of infected people is approximately 6 million, with a population exposed to the risk of infection of 550000. It is our interest to develop a non-invasive and low-cost methodology, capable of detecting any early cardiac alteration that also allows us to see dysautonomia or dysfunction within 24 hours and with this it could be used to detect any cardiac alteration caused by T early Cruzi. For this, we analyzed the 24-hour Holter ECG records in 107 patients with ECG abnormalities (CH2), 102 patients without ECG alterations (CH1) who had positive serological results for Chagas disease and 83 volunteers without positive serological results for Chagas disease (CONTROL). Approximate entropy was used to quantify the regularity of electrocardiograms (ECG) in the three groups. We analyzed 288 ECG segments per patient. Significant differences were found between the CONTROL-CH1, CONTROL-CH2 and CH1-CH2 groups.Postprint (published version

Axiología del trabajo de campo en geografía: una teorización fenomenológica

El propósito de la investigación fue develar desde la experiencia-vivencia de los estudiantes-docentes, los elementos que caracterizan la axiología ambiental del trabajo de campo en Geografía, como estrategia para la formación de profesionales de la enseñanza con competencias para el accionar ambientalmente responsable. Se orientó bajo el paradigma subjetivista, con una orientación cualitativa-interpretativa y socio- construccionista, sustentado en la corriente fenomenológica. Entre los hallazgos se tiene que el trabajo de campo: (a) promueve valores que  van más allá de lo individual con el esfuerzo personal y la seguridad en sí mismos, para alcanzar el plano político social y pedagógico, con el compromiso por su propia formación y el reconocimiento de lo aprendido; y (b) potencia los valores ético-ambientales no solo en el plano estético-ambiental, sino que además, promueve reflexiones sobre las implicaciones del uso actual de los recursos, posibilidades de uso responsable y la esperanza de un futuro mejor

Análisis económico-financiero de una muestra de las empresas de animación de la isla de Tenerife

El objetivo de este trabajo es elaborar un análisis económico-financiero de una muestra del sector de la animación en Tenerife en los años 2018 y 2019, más concretamente sobre las empresas que producen animación para películas y series de televisión, para así conocer su situación actual y su viabilidad futura, aportando conclusiones útiles que nos permitan seguir mejorando en el desarrollo de un sector tan prometedor. Para ello, hacemos uso de la literatura existente y los datos extraídos del Sistema de Análisis de Balances Ibéricos para estudiar las principales partidas del balance y de la cuenta de pérdidas y ganancias pudiendo describir su evolución y compararla con la misma información obtenida de una muestra de las empresas españolas con características similares situadas fuera de Canarias. En este sentido, calculamos además las ratios más relevantes para analizar la liquidez, el endeudamiento y la rentabilidad, y las comparamos con el comportamiento de la muestra de empresas españolas que no están en Canarias, para hacer visible su situación y la capacidad de crecimiento que poseen.The objective of this essay consists in preparing an economic-financial analysis about a sample of the animation sector in Tenerife in 2018 and 2019, more specifically about companies that produce animation for films and television series, in order to know its current situation and its future viability by providing useful conclusions that allow us to continue improving the development of such a promising sector. To do this, we will use the existing literature and data extracted from the Iberian Balance Sheet Analysis System to study the main items on the balance sheet and the profit and loss account, while it makes possible to describe their evolution and compare it with the same information obtained from a sample of Spanish companies with similar characteristics located outside the Canary Islands. In this sense, we also calculate the most relevant ratios to analyse liquidity, indebtedness and profitability, and compared them with the behaviour of the sample of Spanish companies that are not in the Canary Islands to showcase their situation and growth capacity

Heuristic Optimization of Deep and Shallow Classifiers: An Application for Electroencephalogram Cyclic Alternating Pattern Detection

Methodologies for automatic non-rapid eye movement and cyclic alternating pattern analysis were proposed to examine the signal from one electroencephalogram monopolar derivation for the A phase, cyclic alternating pattern cycles, and cyclic alternating pattern rate assessments. A population composed of subjects free of neurological disorders and subjects diagnosed with sleep-disordered breathing was studied. Parallel classifications were performed for non-rapid eye movement and A phase estimations, examining a one-dimension convolutional neural network (fed with the electroencephalogram signal), a long short-term memory (fed with the electroencephalogram signal or with proposed features), and a feed-forward neural network (fed with proposed features), along with a finite state machine for the cyclic alternating pattern cycle scoring. Two hyper-parameter tuning algorithms were developed to optimize the classifiers. The model with long short-term memory fed with proposed features was found to be the best, with accuracy and area under the receiver operating characteristic curve of 83% and 0.88, respectively, for the A phase classification, while for the non-rapid eye movement estimation, the results were 88% and 0.95, respectively. The cyclic alternating pattern cycle classification accuracy was 79% for the same model, while the cyclic alternating pattern rate percentage error was 22%.info:eu-repo/semantics/publishedVersio

Human Computer Interactions in Next-Generation of Aircraft Smart Navigation Management Systems: Task Analysis and Architecture under an Agent-Oriented Methodological Approach

The limited efficiency of current air traffic systems will require a next-generation of Smart Air Traffic System (SATS) that relies on current technological advances. This challenge means a transition toward a new navigation and air-traffic procedures paradigm, where pilots and air traffic controllers perform and coordinate their activities according to new roles and technological supports. The design of new Human-Computer Interactions (HCI) for performing these activities is a key element of SATS. However efforts for developing such tools need to be inspired on a parallel characterization of hypothetical air traffic scenarios compatible with current ones. This paper is focused on airborne HCI into SATS where cockpit inputs came from aircraft navigation systems, surrounding traffic situation, controllers' indications, etc. So the HCI is intended to enhance situation awareness and decision-making through pilot cockpit. This work approach considers SATS as a system distributed on a large-scale with uncertainty in a dynamic environment. Therefore, a multi-agent systems based approach is well suited for modeling such an environment. We demonstrate that current methodologies for designing multi-agent systems are a useful tool to characterize HCI. We specifically illustrate how the selected methodological approach provides enough guidelines to obtain a cockpit HCI design that complies with future SATS specifications.This work was supported in part by Projects MINECO TEC2011-28626-C02-01/02, by program CENIT-ATLANTIDA (cofinanced by Indra and Boeing R&TE), and by ULPGC Precompetitive Research Project (ULPGC Own Program).Publicad

Primer registro de tamarixia radiata (waterston, 1922) (hymenoptera: eulophidae) en colombia

Tamarixia radiata es un ectoparasitoide idiobionte de Diaphorina citri Kuwayama (Hemiptera: Psyllidae); la especie fue descrita a partir de material recogido en la India. Ha sido introducida en muchas regiones intencional o accidentalmente para el control biológico de D. citri, incluyendo algunos países asiáticos. Se sabe de su presencia en el sur de África y las Américas. En Suramérica, se reportó en Brasil, Argentina y ahora en Colombia

Indicadores Bibliométricos, Redes de Coautorias e Colaboração Institucional em Revistas Colombianas de Psicologia

This study was carried out with the objective of analyzing the bibliometric production indicators in six psychology journals in Colombia during the 2009-2011period, defining the properties of the scientific collaboration networks between the authors and institutions. With that purpose in mind we carried out the standardization of the information related to the articles published in each one of the journals defining the production indexes in accordance with bibliometric criteria (number of articles and authors, areas of publication, type of production, among others); we calculated structural indicators of the networks and we designed visualizations of the scientific cooperation networks. What stands out is an extensive production in countries such as Colombia, Spain and Mexico, essentially in Spanish, within the field of applied research. We observed a high level of collaboration between authorsEste estudio fue desarrollado con el objetivo de analizar los indicadores bibliométricos de producción de seis revistas de psicología en Colombia durante el período 2009-2011, para lo que se definieron las propiedades de las redes de colaboración científica entre los autores e instituciones. Para ello, se realizó la estandarización de la información relacionada con los artículos publicados en cada una de las revistas, se definieron los índices de producción de acuerdo con criterios bibliométricos (nú- mero de artículos y autores, áreas de publicación, tipo de producción, entre otros), se calcularon indicadores estructurales de las redes y se diseñaron visualizaciones de las redes de cooperación científica. Se destaca una producción amplia en países como Colombia, España y México, esencialmente en español, con resultados de investigación aplicada. Se observó un nivel elevado de colaboración entre autoresEste estudo foi desenvolvido com o objetivo de analisar os indicadores bibliométricos de produção em seis revistas de psicologia na Colômbia durante o período 2009-2011, definindo as propriedades das redes de colaboração científica entre os autores e instituições. Para isso, realizou-se a estandardização da informação relacionada com os artigos publicados em cada uma das revistas definindo os índices de produção conforme a critérios bibliométricos (número de artigos e autores, áreas de publicação, tipo de produção, entre outros); calcularam-se indicadores estruturais das redes e se criaram visualizações das redes de cooperação cientí- fica. Destaca-se uma produção ampla em países como a Colômbia, a Espanha e o México, essencialmente em espanhol, com resultados de pesquisa aplicada. Observou-se um nível elevado de colaboração entre autores