359 research outputs found
A New algorithm for adapting the configuration of subcomponents in large-scale optimization with cooperative coevolution
No full textThe cooperative coevolutionary (CC) approach can be very effective in solving problems of large-scale continuous optimization (LSGO) through their decomposition into lower-dimensional subcomponents. However, it is well known that the CC performance can be significantly influenced by the adopted decomposition. Moreover, since the method may require evolving a number of populations, also the size of the latter can largely affect the optimization process. In this article, focusing on equally sized decompositions, we present the results of an in-depth investigation concerning the effects of both the size of populations and the dimensionality of subcomponents on the performance of a CC optimizer. According to our study, in several cases only a small set of suitable configurations corresponds to a high optimization performance. Furthermore, we propose a new CC algorithm in which part of the available computational budget is spent for adapting both the dimensionality of subcomponents and the number of evolved individuals during the optimization process. Using a rich set of benchmark problems, we show that the proposed approach can outperform a state-of-the art algorithm based on adaptive equally sized decompositions
First person – Pawel Leznicki
No full textABSTRACT
First Person is a series of interviews with the first authors of a selection of papers published in Journal of Cell Science, helping early-career researchers promote themselves alongside their papers. Pawel Leznicki is the first author on ‘Expansion of DUB functionality generated by alternative isoforms – USP35, a case study’, published in Journal of Cell Science. Pawel conducted the research in this article while in Yogesh Kulathu's lab at the University of Dundee, UK. He is now a research associate in the lab of Stephen High at the University of Manchester, UK, investigating protein biogenesis processes and their quality control.</jats:p
Summary 1: Adhesivity, Bigraphs and Bisimulation Congruences
No full textThis paper is intended as a short informal summary of some
of the topics which arose at the Dagstuhl meeting held 6/06/04-11/06/04.
In particular, we shall summarise some of the content of talks by H. Ehrig, F. Gadducci, O. H. Jensen, R. Milner, B. K�¶nig,
V. Sassone and the author. The general areas include adhesive
categories and generalisations, contextual labelled transition semantics
for graph transformation systems via borrowed-contexts and GIPOs, and
bigraphs. We shall conclude with a summary of some of the discussions
which followed the aforementioned presentations
Psychology of a Culture: Humanism and Social Ineffectiveness Embedded in Polish Ways of Life
No full textThis paper is intended as a learning tool for students wishing to expand their knowledge on culture – psychology interaction derived from a single culture perspective. The paper presents a cultural psychology approach to two themes of Polish culture: Humanism and Social (In)-Effectiveness. The text is divided into three distinct parts: (1) A detailed account of a foreigner\u27s encounter with Poland, where standards typical for this culture are introduced; (2) Historical analysis tracing the origins of these two syndromes in Poland; (3) Empirical comparative studies combined over twenty five years, and their meta-analysis
Front Matter, Table of Contents, Preface, List of Authors
No full textFront Matter, Table of Contents, Preface, List of Author
Est-ce la fin de solidarité ?
No full textPAWEL KUCZYNSKI The author inquires about the consequences of the change of political regime in Poland (summer 1989) for Solidarity, which had, until there represented the oppostion against the power of the "State-Party". Growing out of mass strikes in 1980, Solidarity was both a powerful trade-union and a social movement representative of all social strata. Now this counter-power finds itself in an ambiguous position after winning elections and forming a government of its own. As a consequence Solidarity is torn between conflicting missions which must each be assumed, which in turn menaces its very foundations. Nevertheless, the author does not exclude the possibility that Solidarity could find a new identity by drawing conclusions from the present contradictions.Résumé : L'auteur s'interroge sur les conséquences du changement de régime politique en Pologne (été 1989) sur Solidarité qui représentait jusque-là l'opposition au pouvoir de l'Etat- Parti. Née des grèves massives de 1980, Solidarité était à la fois un puissant syndicat et un mouvement social dans lequel se reconnaissaient toutes les couches de la société. Or, ce puissant contre-pouvoir se retrouve maintenant dans une position ambiguë à la suite de sa victoire électorale et de la constitution d'un gouvernement issu de ses rangs. Dès lors, Solidarité se trouve écartelée entre des missions contradictoires qu'elle est tenue d'assumer, au point d'être menacée dans ses fondements mêmes. Toutefois, l'auteur n'exclut pas que Solidarité puisse trouver une nouvelle identité en tirant les conséquences des contradictions actuelles.Kuczynski Pawel. Est-ce la fin de solidarité ?. In: Sociétés contemporaines N°2, Juin 1990. Europe de l'Est des sociétés en mutation. pp. 49-55
Mapping Pawel Pawlikowski and Last Resort
No full textThis article looks at the British-Polish film-maker Pawel Pawlikowski and his film Last Resort (2000). It argues that the film-maker and the film’s main protagonist are prime examples of a postcommunist condition, which has manifested itself since the fall of the Berlin Wall. Drawing on the Bourdieuian concept of ‘cultural capital’, the author claims that Pawlikowski, although a hybrid film-maker, should be considered as a British director, with his cinematic capital bound up in the liturgy of Eastern Europe, particularly Russia. By choosing Margate for his film, Pawlikowski aligns himself alongside iconic film-makers like Lindsay Anderson. Moreover, through this seaside town, he is able to evoke a sense of British decline, which in Pawlikowski’s film melts into an ‘Eastern Europe’ on the coastal fringe of Britain. In Pawlikowski’s film, Margate becomes an example of the postcommunist condition through its abundance of migration, grey housing blocks, surveillance and social misery. If the film-maker is successful in gaining recognition for his cinematic capital as an insider of postcommunism, then his leading heroine fails in her quest for happiness and love in Britain partly because her cultural capital is not recognized. The postcommunist condition is most tangible in Tanya’s migration; however, Alfie, Tanya’s British suitor and saviour, is also part of this global condition, which has engulfed the old Cold War divide. In Last Resort, both East and West function to exhibit a shared postcommunist condition
A sharp multiplier theorem for solvable extensions of Heisenberg and related groups
No full textLet G be the semidirect product N R, where N is a stratified Lie group and R acts on N via
automorphic dilations. Homogeneous left-invariant sub-Laplacians on N and R can be lifted
to G, and their sum is a left-invariant sub-Laplacian on G. In previous joint work of Ottazzi,
Vallarino and the first-named author, a spectral multiplier theorem of Mihlin–Hörmander type
was proved for , showing that an operator of the form F() is of weak type (1, 1) and
bounded on L p(G) for all p ∈ (1,∞) provided F satisfies a scale-invariant smoothness
condition of order s > (Q + 1)/2, where Q is the homogeneous dimension of N. Here we
show that, if N is a group of Heisenberg type, or more generally a direct product of Métivier
and abelian groups, then the smoothness condition can be pushed down to the sharp threshold
s > (d + 1)/2, where d is the topological dimension of N. The proof is based on lifting to
G weighted Plancherel estimates on N and exploits a relation between the functional calculi
for and analogous operators on semidirect extensions of Bessel–Kingman hypergroups
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