Aplicando estadística en problemas actuales

En el artículo se presenta una experiencia de aula con alumnos de entre 14 y 15 años del Colegio Proyección Siglo XXI de Osorno–Chile, uno de los objetivos de la investigación fue trabajar conjuntamente el sector de Matemática y Educación Física esto a través de la Estadística Elemental y asignándoles problemáticas relacionadas con la salud y la actividad física, que puedan ser resueltas mediante la aplicación de cuestionarios, previamente validados por expertos. Los datos recopilados, se presentaron en tablas y gráficos, estableciendo conclusiones mediante estadígrafos. Para la difusión de los resultados, cada grupo realizó un informe y una exposición. Con esta experiencia se logró la introducción de los estudiantes en una problemática, que investiguen y recopilen información. A su vez se consiguió la integración de diversas áreas del conocimiento, como Biología, Actividad Física y Salud, Lenguaje y Matemática

Bibliometric Analysis of the Scientific Production on Soil Erosion in Andalusia (1964-2008)

En este artículo se aplican indicadores bibliométricos para analizar la producción científica sobre erosión hídrica del suelo efectuada en Andalucía entre 1964 y 2008. La información bibliográfica se ha obtenido de Bib-Eron, base de datos en estudios de erosión del CIDE, que cuenta para el marco territorial y el periodo temporal de análisis con 433 referencias bibliográficas procedentes de publicaciones periódicas internacionales (135 referencias) y nacionales (99), actas de simposios celebrados en España (83) y en el extranjero (21), capítulos de libros (54), libros (18), Tesis Doctorales (16)y otros documentos (7). El análisis bibliométrico se ha basado en los siguientesindicadores: número de trabajos publicados por año de edición, análisis temático,características de las contribuciones publicadas en revistas nacionales e internacionales,distribución de las publicaciones según su referencia territorial, procedenciainstitucional de los firmantes, productividad institucional y colaboracióninterinstitucional.The primary aim of this paper is to analyze the scientific literature of soil water erosion research in Andalusia by means of bibliometric indicators. The period under consideration runs from 1964 to 2008, representing a total of 433 works published in international (135 references) and national (99) journals, national (83) and international (21) conferences proceedings, book chapters (54), books (18), doctoral thesis (16) andother documents (7). Bibliographicinformation was collected from Bib-Eron, abibliographic database on soil erosion. The analysis was based on the scientificdocuments encoded in the database. Bibliometric indicators have been employed inorder to establish the number of documents published by year of publication,distribution of documents by research topics,characteristics of contributions publishedin national and international journals, geographical distribution of scientific production,institutional affiliation of authors, institutional productivity and interinstitutionalcollaboration

Framework Architecture Design for Emergency Response System

Emergency management is essential to mitigate the effects of unforeseen situations. However, this task is complex due to the large amount of information and complex procedures to be handled. To address these challenges, it is necessary to have tools that allow flexible responses to problems classified as knowledge-intensive procedures (KIP). In this sense, we propose the design of a framework for an Emergency Response System (ERS) based on Service Oriented Architecture (SOA) that integrates Adaptive Case Management (ACM) and Business Process Modelling (BPM). This framework is characterised by its interoperability with devices and collaborative systems, which allows the creation and association of content related to emergency management, thus improving usability. In addition, it is designed to be scalable, allowing the incorporation of new modular functionalities. Once the development of the framework has been completed, future lines of research will be opened for its validation and comparison with other ERS

Tripod-shaped penta (p-phenylene)s for the functionalization of silicon surfaces

In order to obtain nanostructured thin films to be used in biosensor devices, several chemical functionalization methods have been developed, such as Click chemistry or Suzuki carbon-carbon coupling reactions on surfaces.1 With the aim to control the orientation and spacing between grafted functional groups on a surface, tripodal oligo (p-phenylene)s have become the ideal anisotropic adsorbates due to their shape-persistent and self-standing characteristics.2 Here we report the synthesis and characterization of several tripod-shaped oligo(p-phenylene)s molecules with legs composed of five phenylene units, compounds 1, 2 and 3. In these structures, each leg is end-capped with an NH-Boc, NH2 and N3 group, respectively. The functional arm contains an acetylene group. The presented synthesis has as key step the Pd-catalyzed Suzuki cross-coupling reaction. In particular, a iodine derivative from the silicon core molecule reacts with the appropriate tetra(p-phenylene) boron derivative, thus generating the final tripod-shaped structure. The azide end-capped leg in 3 is specifically designed for its covalent incorporation on alkynyl terminated silicon surfaces by an easy and reproducible way. As a preliminary study, we present the alkynyl-functionalized silicon wafers nanostructuration with tripod 3 through the cooper catalyzed alkyne-azide cycloaddition (CuAAC) click reaction.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Determinant factors of pull up performance in trainedathletes

Aim: to investigate the relationship among pull up and lat pull exercises and differentanthropometric dimensions in trained athletes. Methods: twenty-five males were evaluated for maximum number of pull ups, one-repetitionmaximum lat pull (1RM Lat Pull), lat pull repetitions at 80% 1RM (Lat Pull at 80% 1RM), latpull repetitions at a load equivalent to body mass (Lat Pull at BM-load), and differentanthropometric variables. Furthermore, the subjects were divided in higher (HPG, n = 12) andlower pull up performance (LPG, n = 13) to compare the differences in the variables analyzedbetween both levels. Results: pull ups were significantly correlated with Lat Pull at BM-load (r = .62, P < .01) butneither with 1RM Lat Pull (r = .09) nor with Lat Pull at 80% 1RM (r = -.15). Pull ups showed asignificant (P < .05) negative relationship with body mass (BM, r = -.55), lean body mass(LBM, r = -.51), and fat mass (FM, r = -.52), while BM and LBM were significantly correlatedwith 1RM Lat Pull (r = .55, P < .05). HPG showed significantly (P < .05) lower BM (0/3/97%),FM (1/3/97%) and LBM (1/4/95%) than LPG. Furthermore, HPG attained significantly (P < .05– .001) greater performance in Lat Pull at BM-load (100/0/0%) and 1RM Lat Pull•BM-1(96/3/2%) than LPG. Conclusion: these findings suggest that pull up and lat pull exercises have common elements.Moreover, the anthropometric dimensions seem to influence differently on both exercises,depending on the strength indicator evaluated

Adaptive Vectorial Filter for Grid Synchronization of Power Converters Under Unbalanced and/or Distorted Grid Conditions

This paper presents a new synchronization scheme for detecting multiple positive-/negative-sequence frequency harmonics in three-phase systems for grid-connected power converters. The proposed technique is called MAVF-FLL because it is based on the use of multiple adaptive vectorial filters (AVFs) working together inside a harmonic decoupling network, resting on a frequency-locked loop (FLL) which makes the system frequency adaptive. The method uses the vectorial properties of the three-phase input signal in the αβ reference frame in order to obtain the different harmonic components. The MAVF-FLL is fully designed and analyzed, addressing the tuning procedure in order to obtain the desired and predefined performance. The proposed algorithm is evaluated by both simulation and experimental results, demonstrating its ability to perform as required for detecting different harmonic components under a highly unbalanced and distorted input grid voltage

Estudio de la influencia de la calidad del agua de riego sobre las propiedades bioquímicas del suelo

Trabajo presentado en el VII Simposio Nacional sobre Control de la Degradación y Restauración de Suelos, celebrado en Bilbao, España, del 23 al 26 de junio de 2015Este estudio analiza la influencia de la calidad del agua de riego sobre los parámetros bioquímicos de los Fluvisoles calcáricos representativos en dos zonas del sur de Alicante. Mediante un análisis de componentes principales (ACP) se obtuvo el PC1 (40% variabilidad), referente a la salinidad, siendo útil para diferenciar ambas zonas de estudio, y el PC2 (31%), englobando los parámetros bioquímicos, que distingue las muestras en función de la profundidad. Sin embargo, no se ha observado un efecto negativo sobre las principales actividades enzimáticas en el área más afectada por la salinización.Peer Reviewe

Gráficas y tablas estadísticas en la prueba de selección universitaria chilena

En este artículo presentamos los resultados de un análisis de las preguntas en las que intervienen gráficos y tablas de la sección de estadística y probabilidad en los facsímiles de la Prueba de Selección Universitaria (PSU) en los procesos de admisión 2005 al 2015. La metodología seguida en esta investigación es de tipo cualitativa, descriptiva y mediante análisis de contenido. Dentro de los resultados se destacan un predominio de tablas estadísticas, gráficos de barras, nivel de lectura “leer dentro de los datos”, nivel semiótico “representación de una distribución de datos” y de las actividades que se hacen referencia al cálculo relacionados de la frecuencia, variable y sus valores