980 resultados para R package


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Self-injurious and aggressive behaviours have often been identified as the cause for students’ lack of academic progress, parental distress, health risks and teachers´ low satisfaction levels. Functional analysis has been identified in the research literature as the benchmark of effective treatments for disruptive and/or inappropriate behaviours. The present study was completed with a girl diagnosed with ASD. An experimental functional analysis was conducted identifying the function of self-injurious behaviours and tantrums to be escaping from tasks. A treatment package was consequently put in place integrating several components that aimed at reducing overall levels of inappropriate behaviours. Results showed a clear and meaningful improvement in the student´s overall health and academic progress, as well as in parental involvement, teachers’ satisfaction and school inclusion. These outcomes are discussed in the light of evidence-based experimental procedures based on applied behaviour analysis and more specifically on the functional-analytic literature, which, if put in place consistently, can bring valuable positive changes in the quality of life of individuals with ASD.

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Survivorship is an important issue in cancer care in the UK. More people are being diagnosed with the disease and many more are living for longer after diagnosis. The National Cancer Survivorship Initiative recommends that patients with cancer have a package of care designed to improve outcomes and support for those living with and beyond the disease. The recovery package consists of a holistic needs assessment, treatment summary, cancer care review and health and wellbeing event. Although these interventions are recommended as a way to improve care, many people do not have access to the combined package, or even some of its components. The Cancer Nursing Partnership (CNP), a collaboration of cancer nursing organisations and communities of influence, has been established to support nurses with delivery of the recovery package in practice. This article describes the package and its components, introduces the CNP and outlines the work it has carried out to date.r/>

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Compositional data naturally arises from the scientific analysis of the chemical composition of archaeological material such as ceramic and glass artefacts. Data of this type can be explored using a variety of techniques, from standard multivariate methods such as principal components analysis and cluster analysis, to methods based upon the use of log-ratios. The general aim is to identify groups of chemically similar artefacts that could potentially be used to answer questions of provenance. This paper will demonstrate work in progress on the development of a documented library of methods, implemented using the statistical package R, for the analysis of compositional data. R is an open source package that makes available very powerful statistical facilities at no cost. We aim to show how, with the aid of statistical software such as R, traditional exploratory multivariate analysis can easily be used alongside, or in combination with, specialist techniques of compositional data analysis. The library has been developed from a core of basic R functionality, together with purpose-written routines arising from our own research (for example that reported at CoDaWork'03). In addition, we have included other appropriate publicly available techniques and libraries that have been implemented in R by other authors. Available functions range from standard multivariate techniques through to various approaches to log-ratio analysis and zero replacement. We also discuss and demonstrate a small selection of relatively new techniques that have hitherto been little-used in archaeometric applications involving compositional data. The application of the library to the analysis of data arising in archaeometry will be demonstrated; results from different analyses will be compared; and the utility of the various methods discussed

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R from http://www.r-project.org/ is ‘GNU S’ – a language and environment for statistical computing and graphics. The environment in which many classical and modern statistical techniques have been implemented, but many are supplied as packages. There are 8 standard packages and many more are available through the cran family of Internet sites http://cran.r-project.org . We started to develop a library of functions in R to support the analysis of mixtures and our goal is a MixeR package for compositional data analysis that provides support for operations on compositions: perturbation and power multiplication, subcomposition with or without residuals, centering of the data, computing Aitchison’s, Euclidean, Bhattacharyya distances, compositional Kullback-Leibler divergence etc. graphical presentation of compositions in ternary diagrams and tetrahedrons with additional features: barycenter, geometric mean of the data set, the percentiles lines, marking and coloring of subsets of the data set, theirs geometric means, notation of individual data in the set . . . dealing with zeros and missing values in compositional data sets with R procedures for simple and multiplicative replacement strategy, the time series analysis of compositional data. We’ll present the current status of MixeR development and illustrate its use on selected data sets

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The statistical analysis of compositional data is commonly used in geological studies. As is well-known, compositions should be treated using logratios of parts, which are difficult to use correctly in standard statistical packages. In this paper we describe the new features of our freeware package, named CoDaPack, which implements most of the basic statistical methods suitable for compositional data. An example using real data is presented to illustrate the use of the package

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The statistical analysis of compositional data should be treated using logratios of parts, which are difficult to use correctly in standard statistical packages. For this reason a freeware package, named CoDaPack was created. This software implements most of the basic statistical methods suitable for compositional data. In this paper we describe the new version of the package that now is called CoDaPack3D. It is developed in Visual Basic for applications (associated with Excel©), Visual Basic and Open GL, and it is oriented towards users with a minimum knowledge of computers with the aim at being simple and easy to use. This new version includes new graphical output in 2D and 3D. These outputs could be zoomed and, in 3D, rotated. Also a customization menu is included and outputs could be saved in jpeg format. Also this new version includes an interactive help and all dialog windows have been improved in order to facilitate its use. To use CoDaPack one has to access Excel© and introduce the data in a standard spreadsheet. These should be organized as a matrix where Excel© rows correspond to the observations and columns to the parts. The user executes macros that return numerical or graphical results. There are two kinds of numerical results: new variables and descriptive statistics, and both appear on the same sheet. Graphical output appears in independent windows. In the present version there are 8 menus, with a total of 38 submenus which, after some dialogue, directly call the corresponding macro. The dialogues ask the user to input variables and further parameters needed, as well as where to put these results. The web site http://ima.udg.es/CoDaPack contains this freeware package and only Microsoft Excel© under Microsoft Windows© is required to run the software. Kew words: Compositional data Analysis, Software

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This paper presents a first approach of Evaluation Engine Architecture (EEA) as proposal to support adaptive integral assessment, in the context of a virtual learning environment. The goal of our research is design an evaluation engine tool to assist in the whole assessment process within the A2UN@ project, linking that tool with the other key elements of a learning design (learning task, learning resources and learning support). The teachers would define the relation between knowledge, competencies, activities, resources and type of assessment. Providing this relation is possible obtain more accurate estimations of student's knowledge for adaptive evaluations and future recommendations. The process is supported by usage of educational standards and specifications and for an integral user modelling

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Se reseña la celebración del cursillo sobre 'Statistical Package for Social Sciences' en enero de 1980, en el Centro de Cálculo de la Universidad Politécnica de Barcelona, organizado por el Departamento de Investigación del INCIE, en el marco de las actividades del Seminario Permanente que sobre Metodología de la Investigación Educativa desarrolla este organismo. También, se ofrecen explicaciones teóricas y prácticas de este programa de tratamiento de la información llamado SPSS cuya aplicación se dirige, en especial, a la investigación en ciencias humanas.

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1) Comprobar si el contenido de las características de personalidad según Reimplein, como se recogen en el VTC-R, coinciden con las variables del Cuestionario de Personalidad 16 PF de Cattell.2) Descubrir, a través del análisis factorial, distintos tipos de personalidad, y compulsar, de alguna manera, las semejanzas y diferencias entre ambos sexos. 22 sujetos masculinos y 202 femeninos, alumnos de una escuela de Formación del Profesorado de E.G.B. Para el objetivo de este trabajo es necesario precisar el contenido de las variables del cuestionario VTC-R, y para comprobar de alguna forma las diferencias existentes entre ambos sexos, se utiliza los resultados del análisis factorial. Se considera, en primer lugar el análisis factorial de las variables VTC-R, en sí mismo, describiéndose cada uno de los tipos resultantes. La presencia de variables del 16 PF en un análisis ulterior permite precisar el sentido y significado de las variables VTC-R, que prácticamente permanecen igualmente estructuradas. Tipos de personalidad responden a los diversos factores; y sobre la base de coincidencias de cada factor, se fija lo común a ambos sexos y se destaca lo específico de cada uno. Se llega asía una estructura compleja de la Personalidad. El análisis factorial se ha calculado por el correspondiente programa Factor Statistical Package of Social Sciences (SPSS). El análisis de la muestra ha sido realizado a través del Cuestionario VTC-R, y del Cuestionario de Personalidad de Cattell: 16 PF. Ambos cuestionarios se refieren a elementos constitutivos de la personalidad. El cuestionario VTC-R se encuentra en fase de experimentación. Se miden tres dimensiones de la personalidad: vitalidad, temperamento y carácter, con 46 variables. Aquí analiza los resultados de una primera aplicación en contraste con el 16 Pf de Cattell. El cuestionario 16 PF, corresponde a la edición de 1985 según publicaciones T.E.A. 1) Aparece una confirmación suficiente de la correspondencia entre las preguntas del cuestionario y las descripciones de las variables en Reimplein. queda manifiesto la relación entre la parte teórica y la empírica. 2) Aunque no son abundantes, si son suficientes para sugerir y confirmar diferencias entre los sexos, que suelen considerarse en la investigación científica.3) El hombre aparece como más egoísta, con mayor afán de poder, y entra con facilidad en la competencia por su gran deseo de verse valorado, con una tendencia más acentuada del yo.4) En la mujer, se destaca la tendencia a las actividades sociales, en que se suelen comportar de una forma refinada. Suelen predominar los sentimientos en su actuar, su capacidad receptiva es grande y va acompañada de gran sensibilidad y delicadeza.5) El 16 PF nos presenta al hombre como un ser racional; esta racionalidad le hace sentirse y ser liberal, con deseo de comprobar en vez de afirmar las cosas sin más.6) Las mujeres, con mayor dependencia de los sentimientos en su actuar, aparecen de poca tolerancia ante las frustraciones, son más conformistas, y, a al vez, más escrupulosas, con mayor sentido de exigencia y perseverancia, esto según el 16 PF.

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An instrument is described which carries three orthogonal geomagnetic field sensors on a standard meteorological balloon package, to sense rapid motion and position changes during ascent through the atmosphere. Because of the finite data bandwidth available over the UHF radio link, a burst sampling strategy is adopted. Bursts of 9s of measurements at 3.6Hz are interleaved with periods of slow data telemetry lasting 25s. Calculation of the variability in each channel is used to determine position changes, a method robust to periods of poor radio signals. During three balloon ascents, variability was found repeatedly at similar altitudes, simultaneously in each of three orthogonal sensors carried. This variability is attributed to atmospheric motions. It is found that the vertical sensor is least prone to stray motions, and that the use of two horizontal sensors provides no additional information over a single horizontal sensor

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