Search results for "Variation"
showing 10 items of 2124 documents
Zróżnicowanie uzębienia u nornika zwyczajnego Microtus arvalis Pallas, 1778 z okolic Częstochowy (Wyżyna Śląska)
2021
An analysis of the diversity in the dentition of the common vole, Microtus arvalis, from three localities near Częstochowa (Panki, Przystajń and Mstów) is provided. Populations from these areas were compared to each other in these terms. The teeth were analyzed – the first lower molar (M1) and the upper third molar of the maxilla (M3). Four basic forms of Simplex, Typica, Duplicata and Variabilis were used to study the diversity of the upper tooth. We developed our own model for studying the differentiation of the lower tooth. The present research and a comparison with literature data confirm that the subspecies M. a. duplicatus does occur in the study area.
Vaya valla! The phenomenon of "yeísmo" in oral Spanish in Valencia
2016
En los últimos años, el fenómeno del yeísmo ha sido abordado desde diferentes perspectivas; una de ellas es la sociolingüística, a la que nuestro trabajo pretende contribuir. El objetivo de este artículo es presentar cómo evoluciona el proceso fonético de deslateralización del fonema /ʎ/ a favor de /ʝ/ en el castellano de la comunidad de habla bilingüe de Valencia y su área metropolitana. Tradicionalmente se ha señalado que Valencia mantenía la diferenciación entre la lateral y fricativa palatales, pero estudios recientes dan cuenta de la introducción y expansión del yeísmo en determinadas comarcas bilingües de la Comunidad Valenciana. En el análisis sociolingüístico realizado actúan grupos…
A Stieltjes Approach to Static Hedges
2014
Static hedging of complicated payoff structures by standard instruments becomes increasingly popular in finance. The classical approach is developed for quite regular functions, while for less regular cases, generalized functions and approximation arguments are used. In this note, we discuss the regularity conditions in the classical decomposition formula due to P. Carr and D. Madan (in Jarrow ed, Volatility, pp. 417–427, Risk Publ., London, 1998) if the integrals in this formula are interpreted as Lebesgue integrals with respect to the Lebesgue measure. Furthermore, we show that if we replace these integrals by Lebesgue–Stieltjes integrals, the family of representable functions can be exte…
Investigating serendipity in recommender systems based on real user feedback
2018
Over the past several years, research in recommender systems has emphasized the importance of serendipity, but there is still no consensus on the definition of this concept and whether serendipitous items should be recommended is still not a well-addressed question. According to the most common definition, serendipity consists of three components: relevance, novelty and unexpectedness, where each component has multiple variations. In this paper, we looked at eight different definitions of serendipity and asked users how they perceived them in the context of movie recommendations. We surveyed 475 users of the movie recommender system, MovieLens regarding 2146 movies in total and compared tho…
A New Augmented Lagrangian Approach for $L^1$-mean Curvature Image Denoising
2015
Variational methods are commonly used to solve noise removal problems. In this paper, we present an augmented Lagrangian-based approach that uses a discrete form of the L1-norm of the mean curvature of the graph of the image as a regularizer, discretization being achieved via a finite element method. When a particular alternating direction method of multipliers is applied to the solution of the resulting saddle-point problem, this solution reduces to an iterative sequential solution of four subproblems. These subproblems are solved using Newton’s method, the conjugate gradient method, and a partial solution variant of the cyclic reduction method. The approach considered here differs from ex…
Determining the number of sources in high-density EEG recordings of event-related potentials by model order selection
2011
To high-density electroencephalography (EEG) recordings, determining the number of sources to separate the signal and the noise subspace is very important. A mostly used criterion is that percentage of variance of raw data explained by the selected principal components composing the signal space should be over 90%. Recently, a model order selection method named as GAP has been proposed. We investigated the two methods by performing independent component analysis (ICA) on the estimated signal subspace, assuming the number of selected principal components composing the signal subspace is equal to the number of sources of brain activities. Through examining wavelet-filtered EEG recordings (128…
Wariantywność stylu tekstu w perspektywie edukacyjnej
2018
The article presents the results of an educational diagnosis. The study it describes analyses the style of invitations prepared by the Polish middle school pupils and its significant variation despite the fact that the subjects did identical tasks in identical conditions. The author is interested in the pupils’ awareness of style, which is why the study analyses only the texts whose writers have made a deliberate and conscious choice of stylistic models. The diversity of style has turned out to be the most pronounced on the level of register, and the main reason behind the style variation among the texts was rooted in the clash between opposing stylistic systems (formality vs. informality) …
The variation of the law applicable to the family property regime in EU regulations n. 2016/1103 and 1104
2021
The essay examines the discipline of EU regulations n. 2016/1103 and 1104 concerning the identification of the law applicable to the family property regime. Specifically, the work reflects on problems arising after a change, during the relationship, of the substantial law applicable to the couple?s property regime.
Text type distinctions and variation in English of software engineering
2008
On elliptic equations involving the 1-Laplacian operator
2018
El objetivo de esta tesis doctoral es dar a conocer los resultados obtenidos sobre existencia, unicidad y regularidad de las soluciones de diferentes ecuaciones elípticas regidas por el operador 1-laplaciano. El primer capítulo está dedicado al estudio de la ecuación - div (Du/|Du|) + g(u) |Du| = f(x) en un subconjunto abierto y acotado U de R^N con frontera Lipschitz, con la condición de Dirichlet u=0 en la frontera, tomando una función f positiva y siendo g una función real, continua y positiva. Por un lado, obtenemos soluciones no acotadas cuando el dato f pertenece al espacio de Marcinkiewicz L^{N,\infty}(U), por lo que debemos introducir la definición apropiada para este tipo de soluci…