Meaning of the λ parameter of skew–normal and log–skew normal distributions in fluid geochemistry

The literature related to skew–normal distributions has grown rapidly in recent years but at the moment few applications concern the description of natural phenomena with this type of probability models, as well as the interpretation of their parameters. The skew–normal distributions family represents an extension of the normal family to which a parameter (λ) has been added to regulate the skewness. The development of this theoretical field has followed the general tendency in Statistics towards more flexible methods to represent features of the data, as adequately as possible, and to reduce unrealistic assumptions as the normality that underlies most methods of univariate and multivariate analysis. In this paper an investigation on the shape of the frequency distribution of the logratio ln(Cl−/Na+) whose components are related to waters composition for 26 wells, has been performed. Samples have been collected around the active center of Vulcano island (Aeolian archipelago, southern Italy) from 1977 up to now at time intervals of about six months. Data of the logratio have been tentatively modeled by evaluating the performance of the skew–normal model for each well. Values of the λ parameter have been compared by considering temperature and spatial position of the sampling points. Preliminary results indicate that changes in λ values can be related to the nature of environmental processes affecting the data

La Escuela Normal de Maestros de Oviedo : 1914-1931.

Resumen tomado de la publicación

Percepci??n normal y patol??gica : una aproximaci??n a sus implicaciones pedag??gicas

Resumen del autor. Res??menes en espa??ol e ingl??s

A new approach to the classification of mammographic masses and normal breast tissue

A new approach to mammographic mass detection is presented in this paper. Although different algorithms have been proposed for such a task, most of them are application dependent. In contrast, our approach makes use of a kindred topic in computer vision adapted to our particular problem. In this sense, we translate the eigenfaces approach for face detection/classification problems to a mass detection. Two different databases were used to show the robustness of the approach. The first one consisted on a set of 160 regions of interest (RoIs) extracted from the MIAS database, being 40 of them with confirmed masses and the rest normal tissue. The second set of RoIs was extracted from the DDSM database, and contained 196 RoIs containing masses and 392 with normal, but suspicious regions. Initial results demonstrate the feasibility of using such approach with performances comparable to other algorithms, with the advantage of being a more general, simple and cost-effective approach

Notas para una historia de la Escuela Universitaria del Magisterio de Oviedo : la Escuela Normal en los años de la Guerra Civil.

Resumen de la autora

Normal brain

Images of normal brains

La escola normal de la postguerra. 'La escuela normal de la postguerra'.

Resumen tomado de la propia revista

Elogi del pr??cticament res : l'Escola Normal de les Illes Balears durant la postguerra. 'Elogio de pr??cticamente nada : la Escuela Normal de las Islas Baleares durante la postguerra'

Resumen tomado parcialmente de la publicaci??n

El fons hist??ric de l'Escola Normal de Barcelona. 'El fondo hist??rico de la Escuela Normal de Barcelona'

Resumen tomado de la publicaci??n

La preparaci?? dels mestres i la Normal de Tarragona. 'La preparaci??n de los maestros y la Normal de Tarragona'

Resumen tomado de la publicaci??n

Using the Normal and Quotation styles in the University's thesis template for MS Word 2010

The Normal style is used for all your standard paragraphs of text in the thesis and also provides the underlying formatting attributes for other styles. Learn how to use this style. For best viewing Download the video. The Quotation style is used to indicate text that it being quoted in your thesis, see how to use this style.

Using the Normal and Quotation styles in the University's thesis template in MS Word 2011 (for Apple computers)

The Normal style is used for all your standard paragraphs of text in the thesis and also provides the underlying formatting attributes for other styles. Learn how to use this style. The Quotation style is used to indicate text that it being quoted in your thesis, see how to use this style. For best viewing Download the video.

Normal distribution and confidence intervals

lecture for COMP6235

L'Escola Normal de Mestres en els seus origens i el reformisme liberal. 'La Escuela Normal de Maestros en sus orígenes y el reformismo liberal'.

Presenta un apéndice documental que recoge documentación oficial de la época analizada