OALib Journal期刊

ISSN: 2333-9721



匹配条件: “Mich`ele Soria” ,找到相关结果约1191条。
Deciding on the Type of the Degree Distribution of a Graph from Traceroute-like Measurements
Xiaomin Wang,Matthieu Latapy,Mich`ele Soria
International Journal of Computer Networks & Communications , 2012,
Abstract: The degree distribution of the Internet topology is considered as one of its main properties. However, it is only known through a measurement procedure which gives a biased estimate. This measurement may in first approximation be modeled by a BFS (Breadth-First Search) tree. We explore here our ability to infer the type (Poisson or power-law) of the degree distribution from such a limited knowledge. We design procedures which estimate the degree distribution of a graph from a BFS of it, and show experimentally (on models and real-world data) that this approach succeeds in making the difference between Poisson and power-law degree distributions.
Distances in random Apollonian network structures
Olivier Bodini,Alexis Darrasse,Michèle Soria
Mathematics , 2007,
Abstract: In this paper, we study the distribution of distances in random Apollonian network structures (RANS), a family of graphs which has a one-to-one correspondence with planar ternary trees. Using multivariate generating functions that express all information on distances, and singularity analysis for evaluating the coefficients of these functions, we describe the distribution of distances to an outermost vertex, and show that the average value of the distance between any pair of vertices in a RANS of order n is asymptotically square root of n.
The Resolved Red Giant Branches of E/S0 Galaxies
Regina E. Schulte-Ladbeck,Igor O. Drozdovsky,Mich`ele Belfort,Ulrich Hopp
Physics , 2002, DOI: 10.1023/A:1024083220618
Abstract: Formation paradigms for massive galaxies have long centered around two antipodal hypotheses -- the monolithic-collapse and the accretion/merger scenarios. Empirical data on the stellar contents of galaxy halos is crucial in order to develop galaxy formation and assembly scenarios which have their root in observations, rather than in numerical simulations. Hubble Space Telescope (HST) has enabled us to study directly individual stars in the nearby E/S0 galaxies Cen A, NGC 3115, NGC 5102, and NGC 404. We here present and discuss HST single-star photometry in V and I bands. Using color-magnitude diagrams and stellar luminosity functions, we gauge the galaxies' stellar contents. This can be done at more than one position in the halo, but data with deeper limiting magnitudes are desired to quantify the variation of metallicity with galactocentric radius. We here compare the color distributions of red giant stars with stellar isochrones, and we intercompare the galaxies' halo populations, noting that their total absolute V magnitudes cover the range from about -21.5 to -17.5. In the future, we plan to model the stellar metallicity distributions with the aim to constrain chemical enrichment scenarios, a step towards unravelling the evolutionary history of elliptical and lenticular galaxies.
From Genotype to Phenotype: Linking Bioinformatics and Medical Informatics Ontologies
Ele Holloway
Comparative and Functional Genomics , 2002, DOI: 10.1002/cfg.181
Abstract: A small group of around 40 people came together at the Chancellors Conference Centre in Manchester for the Ontologies Workshop, chaired by Alan Rector and Robert Stevens. The workshop was, rather strangely, spread over 2 half days. In hindsight, this programme worked very well as it gave people the opportunity to chat over a drink on the Saturday evening and share ideas, before launching into the second half on the following day. The participants were from various walks of life, all with a common interest in finding out more about ontologies and promoting collaborations between the medical informatics and bioinformatics ontology communities.
The connectivity-profile of random increasing k-trees
Alexis Darrasse,Hsien-Kuei Hwang,Olivier Bodini,Michèle Soria
Mathematics , 2009,
Abstract: Random increasing k-trees represent an interesting, useful class of strongly dependent graphs for which analytic-combinatorial tools can be successfully applied. We study in this paper a notion called connectivity-profile and derive asymptotic estimates for it; some interesting consequences will also be given.
Kuidas Soomes, Ann? Aidi Valliku noorsooraamatute retseptsioonist Soomes
Ele Süvalep
L?hiv?rdlusi. L?hivertailuja , 2010,
Abstract: The Finnish reception of the translations of two youth books by Aidi Vallik is analysed on the basis of published reviews, web comments and judgements, and the opinions expressed by a class on Estonian children’s literature held at the University of Oulu in 2008. The introductory part touches upon the concepts of young adult literature and youth literature and, briefly, upon some specific traits of youth literature which are important from the perspective of translation and reception. The analysis of the material revealed that the readers would mainly argue against the fi nal resolutions of the stories as those seem to lay too much emphasis on the adult viewpoint and the didactic aspect. The language use was also found problematic. Notably, in “How are you, Ann?” the main character’s narrative seemed too literary, for some readers, especially in comparison with the colourful diary of Ann’s mother, which makes Ann less interesting than her mother. The general attitude, especially for the first book, was nevertheless positive enough. Despite the reservations typical of youth literature the books of Ann were found interesting by most readers, providing an idea of Estonian youth problems and youth literature.
Multinational Corporations in Transnational Networks: Theoretical and Regulatory Challenges in Historical Perspective  [PDF]
Michèle Rioux
Open Journal of Political Science (OJPS) , 2014, DOI: 10.4236/ojps.2014.43012
Multinational corporations (MNCs) have become the most powerful drivers of integration and structural changes in today’s global economy. MNCs have not completely subordinated States and markets in shaping the global economy, but they have transformed the world and given rise to a new set of economic, political, social, cultural and legal problems. Yet, quite ironically, MNCs are now facing a recombination that tends to subordinate them to transnational networks of corporate economic power. The thorny issue of regulating the global economy is, in this context, even more complex as regulatory systems of global governance must be built to fit those transnational networks superseding States and firms. This article presents an overview of the most important theories in international political economy on MNCs in order to situate the new theoretical challenges pertaining to the understanding of contemporary structural changes in the world economy and their incidences on global governance. The first section presents three configurations of globalization and concludes on the theoretical challenges of explaining and understanding the emergence and development of transnational economic networks. A second section discusses some current issues of regulation. The overall statement of this article is that globalization has, during the last decades, transformed international political economy in ways that now require new theoretical paradigms and new modes of global regulation that are adapted to a truly global economy made of networks rather than nations or firms.
A New Mathematical Model to Simulate Infectious Disease Dynamics in Rivers State Nigeria-I
Vincent Ele Asor,Chidiebere Ugwu
International Journal of Computer Science Issues , 2011,
Abstract: We stretch existing knowledge on model formulation and develop an enhanced mathematical model to study the pattern of spread of infectious diseases in Rivers State. The SIR model formalism was used to compartmentalize the population and the resulting model equations were solved numerically. The disease free equilibrium and endemic equilibrium of the system were established and analyzed for stability. A graph representation of the sub groups is presented and discussed based on the results from simulation.
Integration of leukemia research in Europe: the paradigm CML
R. Hehlmann,S. Sau?ele
Cellular Therapy and Transplantation , 2008,
Abstract: Leukemias are rare diseases, the investigation into which requires multicenter activities, study groups and networking. The ELN integrates leukemia research and trial groups across Europe. Progress with CML continues to promote European integration (EUTOS for CML). Median survival with CML is now expected at 25 years. The main treatment options for CML are TK inhibition and allo-SCT. Treatment optimization trials are ongoing worldwide. Looking at the speed of current progress, the prospects for a cure of CML, and possibly other forms of leukemia, are good.
Classifying the Baltic Sea Shallow Water Habitats Using Image-Based and Spectral Library Methods
Ele Vahtm?e,Tiit Kutser
Remote Sensing , 2013, DOI: 10.3390/rs5052451
Abstract: The structure of benthic macrophyte habitats is known to indicate the quality of coastal water. Thus, a large-scale analysis of the spatial patterns of coastal marine habitats enables us to adequately estimate the status of valuable coastal marine habitats, provide better evidence for environmental changes and describe processes that are behind the changes. Knowing the spatial distribution of benthic habitats is also important from the coastal management point of view. A big challenge in remote sensing mapping of benthic habitats is to define appropriate mapping classes that are also meaningful from the ecological point of view. In this study, the benthic habitat classification scheme was defined for the study areas in the relatively turbid north-eastern Baltic Sea coastal environment. Two different classification methods—image-based and the spectral library—method were used for image classification. The image-based classification method can provide benthic habitat maps from coastal areas, but requires extensive field studies. An alternative approach in image classification is to use measured and/or modelled spectral libraries. This method does not require fieldwork at the time of image collection if preliminary information about the potential benthic habitats and their spectral properties, as well as variability in optical water properties exists from earlier studies. A spectral library was generated through radiative transfer model HydroLight computations using measured reflectance spectra from representative benthic substrates and water quality measurements. Our previous results have shown that benthic habitat mapping should be done at high spatial resolution, owing to the small-scale heterogeneity of such habitats in the Estonian coastal waters. In this study, the capability of high spatial resolution hyperspectral airborne a Compact Airborne Spectrographic Imager ( CASI) sensor and a high spatial resolution multispectral WorldView-2 satellite sensor were tested for mapping benthic habitats. Initial evaluations of habitat maps indicate that image-based classification provides higher quality benthic maps compared to the spectral library?method.

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