466 research outputs found
Generalizing the Convex Hull of a Sample: The R Package alphahull
This paper presents the R package alphahull which implements the ñ-convex hull and the ñ-shape of a finite set of points in the plane. These geometric structures provide an informative overview of the shape and properties of the point set. Unlike the convex hull, the ñ-convex hull and the ñ-shape are able to reconstruct non-convex sets. This flexibility make them specially useful in set estimation. Since the implementation is based on the intimate relation of theses constructs with Delaunay triangulations, the R package alphahull also includes functions to compute Voronoi and Delaunay tesselations. The usefulness of the package is illustrated with two small simulation studies on boundary length estimation.
Advances and uncertainties in compliance measures for users from the Nagoya Protocol in the European Union
The Nagoya Protocol developed the legal regime for the access to genetic resources and the fair and equitable sharing of benefits arising from their utilization that were already enshrined in the Convention on Biological Diversity, and introduced binding rules on compliance. With its Regulation 511/2014 adopted in 2014, the European Union (EU) – the second most important geographical area in the global biotechnology market – has developed and sought to harmonize the compliance and monitoring measures for users from the Nagoya Protocol in the EU territory. This article presents and assesses the progress made in this recent EU legal field, including the challenges in the form of several uncertainties that still lie ahead
CONSTRUYENDO LA IDENTIDAD: EMANCIPACI 3N DESDE LO COTIDIANO
La contemporaneidad del mundo de vida tiene en lo dubitativo su
principal expresi\uf3n. Temores, angustias, paradojas, responsabilidades
re\uf1idas con las convicciones, deseos e intereses reprimidos por la
l\uf3gica de la dominaci\uf3n, irresoluciones y sobre todo, las dudas sobre la
realidad percibida y las expectativas del futuro, alientan el deseo del
hombre por liberarse de lo carente de sentido y significaci\uf3n. Es este el
mundo cotidiano que invita a construir una identidad para hacer uso de
ella, decidida y responsablemente, a fin de transgredir
convencionalismos y encauzar las intenciones sin menoscabar los
leg\uedtimos intereses del resto de actores integrantes de la comunidad
moral. En este art\uedculo, entendiendo la identidad como una
construcci\uf3n moral a partir de lo cotidiano, y utilizando los postulados
te\uf3ricos de Castells, Habermas y Ricoeur, se vinculan los elementos
intervinientes en la intenci\uf3n emancipadora, con la pretensi\uf3n de
encontrar puntos de convergencia entre las instituciones dominantes y
los actores dominados, para asegurar su coexistencia pac\uedfica ante el
pluralismo moral y el relativismo \ue9tico.
ABSTRACT
IDENTITY CONSTRUCTION:
EMANCIPATION FROM QUOTIDIAN
The contemporary life world has in doubtful its main expression
Fears, anguishes, paradoxes, responsibilities bitter with the
convictions, desires and interest repressed by the logic of the
domination, hesitations and mainly, the doubts that hang over the
perceived reality and the expectations of the future, encourage the
desire of the man to free themselves of which it stops he makes no
sense and meaning. It is the this daily world that it invites to construct
an identity to make use of her, determined and responsibly, in order to
transgress conventionalisms and to channel the intentions without
reducing the legitimate interests of the rest of actors of the moral
community. In this article, understanding the identity like a moral
construction starting from quotidian, and using the theoretical
postulates of Castells, Habermas and Ricoeur, the elements that
take part in the emancipated intention, with the pretension to find
points of convergence between the dominant institutions and the
dominated actors, to assure their pacific coexistence, in the presence
of moral pluralism and the ethical relativism
Visualization and analytics of codicological data of Hebrew books
The goal is to provide a proper data model, using a common vocabulary, to
decrease the heterogenous nature of these datasets as well as its inherent uncertainty
caused by the descriptive nature of the field of Codicology. This research project was
developed with the goal of applying data visualization and data mining techniques to the
field of Codicology and Digital Humanities. Using Hebrew manuscript data as a starting
point, this dissertation proposes an environment for exploratory analysis to be used by
Humanities experts to deepen their understanding of codicological data, to formulate new,
or verify existing, research hypotheses, and to communicate their findings in a richer way.
To improve the scope of visualizations and knowledge discovery we will try to use data
mining methods such as Association Rule Mining and Formal Concept Analysis. The
present dissertation aims to retrieve information and structure from Hebrew manuscripts
collected by codicologists. These manuscripts reflect the production of books of a specific
region, namely "Sefarad" region, within the period between 10th and 16th.A presente dissertação tem como objetivo obter conhecimento estruturado de
manuscritos hebraicos coletados por codicologistas. Estes manuscritos refletem a
produção de livros de uma região específica, nomeadamente a região "Sefarad", no
período entre os séculos X e XVI. O objetivo é fornecer um modelo de dados apropriado,
usando um vocabulário comum, para diminuir a natureza heterogénea desses conjuntos
de dados, bem como sua incerteza inerente causada pela natureza descritiva no campo da
Codicologia. Este projeto de investigação foi desenvolvido com o objetivo de aplicar
técnicas de visualização de dados e "data mining" no campo da Codicologia e Humanidades
Digitais. Usando os dados de manuscritos hebraicos como ponto de partida, esta
dissertação propõe um ambiente para análise exploratória a ser utilizado por especialistas
em Humanidades Digitais e Codicologia para aprofundar a compreensão dos dados
codicológicos, formular novas hipóteses de pesquisa, ou verificar existentes, e comunicar
as suas descobertas de uma forma mais rica. Para melhorar as visualizações e descoberta
de conhecimento, tentaremos usar métodos de data mining, como a "Association Rule
Mining" e "Formal Concept Analysis"
On inside ownership of biddings and M&A premia
Mestrado em FinançasEste estudo pretende aferir a relação entre o prémio pago numa fusão pela empresa alvo e o nível de ações prórias controladas pela empresa adquirente. Os dados cobrem 870 fusões efetuadas em capital na Europa e nos Estados Unidos da America entre 2010 e 2019.
Os resultados são inconclusívos se o prémio pago pela empresa adquirente varia com o nível de ações próprias controladas pela empresa adquirente. No entanto, a relação é negativa para prémios calculados tendo em conta o preço médio da empresa adquirente entre o dia em que a fusão é anunciada e o dia anterior. Considerando o prémio pago tendo em conta o preço das ações no dia do anúncio da fusão, ou a média dos preços da semana anterior ao anúncio ou a média dos preços do mês anterior ao anúncio, então a relação negativa deixa de ser estatisticamente significante.
Os resultados deste estudo permitem uma melhor compreensão do prémio oferecido pela empresa adquirente numa aquisição o que, tendo em conta que o prémio pode ser uma das razões que leva ao insucesso de fusões, pode permitir que a taxa de insucesso das fusões diminua futuramente.This study aims to assess the relationship between the premium paid in a merger for the target company and the level of inside ownership of the acquirer. Data covers 870 cash deals in Europe and in the USA between 2010 and 2019.
Results are inconclusive whether the premium paid by the acquiring company changes depending on acquirer?s level of inside ownership. Nevertheless, the relationship is negative for premiums computed considering the average price of the target company between the day of the announcement and the day before the announcement. Narrowing the analysis to the premium paid against the stock price at the announcement date, one-week average, or one-month prior the announcement, then the negative relationship is no longer statistically significant.
The results of this study allow a better understanding of the premium paid by the acquiring company on a takeover which, considering that premium can be a reason why mergers fail, may help decrease the rate of merger failure in the future.info:eu-repo/semantics/publishedVersio
A multivariate uniformity test for the case of unknown support
The final publication is available at http://dx.doi.org/10.1007/s11222-010-9222-
Testing uniformity for the case of a planar unknown support
The definitive version is available at http://www3.interscience.wiley.co
Polynomial volume estimation and its applications
Given a compact set S ⊂ R
d we consider the problem of estimating, from a random sample of points, the Lebesgue measure of S, µ(S), and its boundary measure, L(S) (as defined
by the Minkowski content of ∂S). This topic has received some attention, especially in the
two-dimensional case d = 2, motivated by applications in image analysis. A new method to
simultaneously estimate µ(S) and L(S) from a sample of points inside S is proposed.
The basic idea is to assume that S has a polynomial volume, that is, that V (r) := µ{x :
d(x, S) ≤ r} is a polynomial in r of degree d, for all r in some interval [0, R). We develop a
minimum distance approach to estimate the coefficients of V (r) and, in particular µ(S) and L(S),
which correspond, respectively, to the independent term and the first degree coefficient of V (r).
The strong consistency of the proposed estimators is proved. Some numerical illustrations are
givenThis work has been partially supported by Spanish Grants MTM2016-78751-P (A. Cuevas) and MTM2016-76969-P (B. Pateiro-López)S
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