Constructing an Incidence Model for Dengue Fever applied to Paraguayan communities

Comidenco aims at constructing a predictive model, focused on (but not restricted to) incidence as response variable. The model would take local variables including anti-dengue actions, evaluate the probability of spread of the disease, and predict incidence. This will identify communities with greater danger of an increase in infection rate, helping to decide where to put resources into action.CONACYT - Consejo Nacional de Ciencias y TecnologíaPROCIENCI

Feature Selection: A perspective on inter-attribute cooperation

High-dimensional datasets depict a challenge for learning tasks in data mining and machine learning. Feature selection is an effective technique in dealing with dimensionality reduction. It is often an essential data processing step prior to applying a learning algorithm. Over the decades, filter feature selection methods have evolved from simple univariate relevance ranking algorithms to more sophisticated relevance-redundancy trade-offs and to multivariate dependencies-based approaches in recent years. This tendency to capture multivariate dependence aims at obtaining unique information about the class from the intercooperation among features. This paper presents a comprehensive survey of the state-of-the-art work on filter feature selection methods assisted by feature intercooperation, and summarizes the contributions of different approaches found in the literature. Furthermore, current issues and challenges are introduced to identify promising future research and development.Comment: 17 pages, 2 figure

A research of the mineralogy phases of clinker in a spanish cement using the method of Rietveldd

[ES]: Con el objetivo de implantar un método de control de calidad de forma continua en una fábrica de cementos española, para mejorar las características del producto final, se están desarrollando nuevas metodologías de caracterización. El método de Rietveld [1] se ha utilizado con éxito para analizar la composición de las fases principales del clínker. Utilizando esta metodología, se ha llevado a cabo un estudio para cuantificar adecuadamente la fase minoritaria de Cal Libre, de gran importancia en la calidad del clínker. El método ha permitido obtener unos resultados satisfactorios en muestras cuyos contenidos superan el 3% de CaO. Estos resultados son posibles combinando adecuadamente las técnicas de difracción y fluorescencia de rayos-X, así como los resultados del análisis por vía química.[EN]: In order to introduce continuously a quality control method in a Spanish cement factory to improve the final product feature new research methodology is being developed. The Rietveld method [1] has been successfully used to analyze the composition of the main phases of clinker. Using this methodologies, research has been carried out to quantize appropriately the minor phase of free lime which is extremely important in the clinker quality. This method leads to satisfactory results on samples with contents in CaO from 3%. These results are possible combining X- ray diffraction and fluorescence techniques as well as the chemical analysis data.Los autores agradecen a la empresa Tudela-Veguín las facilidades y la financiación para llevar a cabo este trabajo. Trabajo parcialmente financiado con el proyecto MAT2010-15094 y fondos FEDER.Peer reviewe

Plan de negocio para la implementacion de una fintech del tipo lending para la otorgacion de creditos personales para jovenes entre 18 y 25 años

La siguiente tesis se basa en el análisis y evaluación de un caso de negocio sobre un rubro que en el territorio peruano aún no está del todo explotado, como las son las industrias Fintech, del tipo lending. Para lograr dicho objetivo cual se ha hecho una investigación del entorno global y nacional que rodea este nuevo ecosistema financiero que se está formando, determinar las principales características del consumidor objetivo del estudio, que viene a ser la generación Z (centennials) que vive en Lima Metropolitana y cuáles serían los factores que determinarían s vinculación con nosotros, mediante encuestas realizadas en el periodo de investigación Luego de estudiar las distintas variables del consumidor, posicionamiento de la marca en toda su extensión y los componentes fundamentales como empresa, se realizó el estudio financiero respectivo para evaluar la viabilidad del proyecto, mediante VAN y TIR respectivos a los datos proyectos.The following thesis is based on the analysis and evaluation of a business case on an area that in the Peruvian territory is not yet fully exploited, such as the Fintech industries, like the lending business. To achieve this objective, an investigation of the global and national environment that surrounds this new financial ecosystem that is being formed has been carried out, to determine the main characteristics of the target consumer of the study, which is gen - Z (centennials) living in Lima - Metropolitana - and what would be the factors that would determine your relationship with us, through surveys carried out during the investigation period. After studying the different variables of the consumer, brand positioning in its entirety and the fundamental components as a company, the respective financial study was carried out to evaluate the viability of the project, through NPV and IRR, respectively, to the project data.Trabajo de investigació

Diseño conceptual y preliminar de un compresor centrífugo para un motor turbohélice

En el siguiente documento se presenta el proceso de diseño de un compresor centrifugo de una sola etapa para un motor turbo hélice, el cual se centró en encontrar los parámetros que ayudan a incrementar la eficiencia del motor sin alterar su número de etapas. Para esto, se definieron los parámetros que rigen el funcionamiento del compresor y las condiciones de diseño del mismo, con el fin de dimensionar el impulsor y difusor a partir de las teorías relacionadas con el diseño de compresores centrífugos, tomando como base de diseño el compresor centrifugo de un motor PT6A small. Conforme a las dimensiones obtenidas y las condiciones de salida del fluido se realizó un análisis teórico del desempeño del compresor, para determinar la eficiencia y relación de compresión global, con el fin de implementarlos en el análisis termogasodinámico el cual tiene como fin determinar el rendimiento del motor con el diseño del compresor propuesto y los valores expuestos por el fabricante, dando como resultado un rendimiento similar al de fábrica con tan solo un 2% de diferencia entre estos, logrando con esto identificar las ventajas y desventajas generadas a través de la implementación de este diseño. Posteriormente se realizó un análisis de esfuerzos en el impulsor a partir de la selección del material, con el fin de conocer la deformación en el impulsor, y por último se diseñó el compresor centrífugo en 3D con la ayuda del programa Solid Edge, a partir del dimensionamiento obtenido del compresor, en el cual se incluyeron los factores de diseño en el impulsor y difusor, dado a que producen una eficiencia general del 89%, con una relación de compresión de 3, sin necesidad de que sus demás componentes sufran cambios en sus dimensiones

The impact of term fake news on the scientific community. Scientific performance and mapping in web of science

Nowadays, multiple phenomena have promoted an impact on society, constituting in some cases, not only a contribution of benefits but also of risks. Among them, the fake news phenomenon is considered one of the most burning phenomena today due to the risk it poses to society. In view of this situation, the research community has carried out numerous studies that seek to address this issue from a multidisciplinary perspective. Based on this, the objective of this work was to analyze the productivity and, therefore, the impact of this topic in the research community. To this end, this work advocated a scientometric-type methodology, through scientometric laws, impact indicators, and scientific evolution of 640 publications of the web of science (WOS). The results showed the impact of the fake news discipline today, which is considered an emerging issue that is of interest to many knowledge disciplines around the world. Likewise, the results showed that the publications not only have a focus on analyzing the veracity or not of the news, but that it begins to vertebrate a new line of an investigation directed to the informational education and towards the prevention of the consumption of this type of news through the internet.Ministry of Education, Culture and Sport of the Government of Spain (Project reference: FPU17/05952

A Hardware/Software Platform to Acquire Bioelectrical Signals. A Case Study: Characterizing Computer Access through Attention

This paper describes a hardware/software platform to acquire human body signals. In the field of physiological computing it is desirable to have a system that allows the synchronized acquisition of signals coming from different sources. Here is described how to unify the whole process of acquiring signals from both customized hardware and low cost commercial devices such as Neurosky’s mindwave. A case study using this platform is also shown: studying the feasibility of using sustained attention to access a computer. In order to do that brain activity was measured using Neurosky’s mindwave. The participants in this study were asked to keep their attention high/low for as long as possible during several trials. Experimentation was performed by 7 normally developed subjects and 3 people with cerebral palsy (CP). Our preliminary work shows that 60% of participants might be potential users of this technology. Eventually, modulating the attention to access a communication board needs a scanning period greater than 5.76s

Augmented Reality as a Resource for Improving Learning in the Physical Education Classroom

We acknowledge the researchers of the research group AreA (HUM-672), which belongs to the Ministry of Education and Science of the Junta de Andalucía and is registered in the Department of Didactics and School Organization of the Faculty of Education Sciences of the University of Granada.Recently, there has been a proliferation of technopedagogical practices, based on the application of active teaching and learning processes through the use of information and communication technologies (ICT). The main objective of this work is to analyse the impact of training action through the use of augmented reality in physical education for the development and acquisition of spatial orientation, as opposed to more traditional training based on the exhibition method. The methodology developed is quantitative, through a quasi-experimental design post-test in 140 high school students in the field of physical education. The results indicate that all of the dimensions show a very high, significant relationship. The greatest difference in average is observed in motivation. In contrast, the smallest difference, although significant, is observed in the grades given by the teachers themselves. It can be concluded that the method of teaching through augmented reality is effective in teaching high school students in the subject of physical education, especially for the acquisition of spatially oriented content.Corporacion Escuela Tecnologica del Oriente ISPRS-2017-7202Secretariat of Education of Santander ISPRS-2017-7202AreA HUM/672 Research Group of the University of Granada ISPRS-2017-720

Structural brain changes in patients with persistent headache after COVID-19 resolution

Producción CientíficaHeadache is among the most frequently reported symptoms after resolution of COVID-19. We assessed structural brain changes using T1- and diffusion-weighted MRI processed data from 167 subjects: 40 patients who recovered from COVID- 19 but suffered from persistent headache without prior history of headache (COV), 41 healthy controls, 43 patients with episodic migraine and 43 patients with chronic migraine. To evaluate gray matter and white matter changes, morphometry parameters and diffusion tensor imaging-based measures were employed, respectively. COV patients showed significant lower cortical gray matter volume and cortical thickness than healthy subjects (p < 0.05, false discovery rate corrected) in the inferior frontal and the fusiform cortex. Lower fractional anisotropy and higher radial diffusivity (p < 0.05, family-wise error corrected) were observed in COV patients compared to controls, mainly in the corpus callosum and left hemisphere. COV patients showed higher cortical volume and thickness than migraine patients in the cingulate and frontal gyri, paracentral lobule and superior temporal sulcus, lower volume in subcortical regions and lower curvature in the precuneus and cuneus. Lower diffusion metric values in COV patients compared to migraine were identified prominently in the right hemisphere. COV patients present diverse changes in the white matter and gray matter structure. White matter changes seem to be associ- ated with impairment of fiber bundles. Besides, the gray matter changes and other white matter modifications such as axonal integrity loss seemed subtle and less pronounced than those detected in migraine, showing that persistent headache after COVID-19 resolution could be an intermediate state between normality and migraine.Gerencia Regional de Salud (GRS) de Castilla y León, (GRS 2284/A/2020)Publicación en abierto financiada por el Consorcio de Bibliotecas Universitarias de Castilla y León (BUCLE), con cargo al Programa Operativo 2014ES16RFOP009 FEDER 2014-2020 DE CASTILLA Y LEÓN, Actuación:20007-CL - Apoyo Consorcio BUCL

Construcción de un Modelo de Incidencia de Dengue en Comunidades del Paraguay

El trabajo tiene como objetivo general construir y verificar un modelo matemático para predecir la tasa de incidencia de dengue, en función a variables ambientales, sanitarias y epidemiológicas y en presencia de acciones de intervención anti-dengue.CONACYT – Consejo Nacional de Ciencia y TecnologíaPROCIENCI