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Search Results: 1 - 10 of 869618 matches for " A.-M. O. C. Richeline "
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Fast Semantic Duplicate Detection Techniques in Databases  [PDF]
Ibrahim Moukouop Nguena, A.-M. O. C. Richeline
Journal of Software Engineering and Applications (JSEA) , 2017, DOI: 10.4236/jsea.2017.106029
Abstract: Semantic duplicates in databases represent today an important data quality challenge which leads to bad decisions. In large databases, we sometimes find ourselves with tens of thousands of duplicates, which necessitates an automatic deduplication. For this, it is necessary to detect duplicates, with a fairly reliable method to find as many duplicates as possible and powerful enough to run in a reasonable time. This paper proposes and compares on real data effective duplicates detection methods for automatic deduplication of files based on names, working with French texts or English texts, and the names of people or places, in Africa or in the West. After conducting a more complete classification of semantic duplicates than the usual classifications, we introduce several methods for detecting duplicates whose average complexity observed is less than O(2n). Through a simple model, we highlight a global efficacy rate, combining precision and recall. We propose a new metric distance between records, as well as rules for automatic duplicate detection. Analyses made on a database containing real data for an administration in Central Africa, and on a known standard database containing names of restaurants in the USA, have shown better results than those of known methods, with a lesser complexity.
M-SURGE: new software specifically designed for multistate capture-recapture models
Choquet, R.,Reboulet, A.-M.,Pradel, R.,Gimenez, O.
Animal Biodiversity and Conservation , 2004,
Abstract: M-SURGE (along with its companion program U-CARE) has been written specifically to handle multistate capture-recapture models and to alleviate their inherent difficulties (model specification, quality of convergence, flexibility of parameterization, assessment of fit). In its domain, M-SURGE covers a broader range of models than a general program like MARK (White & Burnham, 1999), while being more user-friendly than MS-SURVIV (Hines, 1994). Among the main features of M-SURGE is a wide class of models and a variety of parameterizations: (1) M-SURGE covers conditional models with probability of recapture depending on the current state (Arnason Schwarz type models) as well as on the current and previous state (Jolly-movement type models). In both cases, age and/or time-dependence and multiple groups can be considered. (2) Combined survival-transition probabilities can be represented as such or decomposed into transition and survival probabilities. (3) Among the transition probabilities with the same state of departure, the one to be computed by subtraction can be freely picked by the user. User-friendliness is enhanced by the easiness with which constrained models are built, using an interpreted language called GEMACO. Examples of various types of multistate models are developed and presented.
Cross-amplification of microsatellite loci in the endangered stone-crayfish Austropotamobius torrentium (Crustacea: Decapoda) Amplification croisée de locus microsatellites chez l’écrevisse des torrents Austropotamobius torrentium (Crustacea: Decapoda)
Iorgu E.I.,Popa O.P.,Petrescu A.-M.,Popa L.O.
Knowledge and Management of Aquatic Ecosystems , 2011, DOI: 10.1051/kmae/2011021
Abstract: The major aim of this study is to describe the first microsatellite loci for the stone-crayfish (Austropotamobius torrentium), by cross-species amplification. Austropotamobius torrentium is a priority species in the EU Habitats Directive and it needs effective conservation management efforts throughout Europe. We tested cross-species amplification of 55 decapod microsatellite primer pairs in A. torrentium and only ten of these loci, from relatively close related species, yielded PCR products of expected sizes. Five of the ten microsatellites proved to be polymorphic (allele numbers ranging from 4 to 14 in a set of 35 individuals). Three of the loci exhibited departure from Hardy-Weinberg equilibrium which could be explained by the presence of null alleles. A forth locus exhibiting HWE deviation, but no null alleles, suggest the possible presence of population substructure of the species in the investigated area. These microsatellite markers are useful for population genetic studies of stone-crayfish. Le but principal de cette étude est de décrire les locus microsatellites chez l’écrevisse des torrents (Austropotamobius torrentium), par amplification croisée. Austropotamobius torrentium est une espèce prioritaire de la Directive Habitats de l’Union Européenne qui nécessite une efficace gestion de conservation à travers l’Europe. Nous avons testé l’amplification croisée de 55 paires de primer microsatellites de décapodes chez A. Torrentium et seulement dix de ces locus, d’espèces relativement proches, ont abouti à des résultats PCR. Cinq des dix microsatellites se sont avérés polymorphes (nombres d’allèles de 4 à 14 pour un lot de 35 individus). Trois de ces locus montraient un écart par rapport à l’équilibre de Hardy-Weinberg, qui pourrait s’expliquer par la présence d’allèles nuls. Un quatrième locus présentant une déviation HWE, mais pas d’allèles nuls, suggère la présence possible d’une sous-structure de cette espèces dans la zone étudiée. Ces marqueurs microsatellites sont utiles pour les études de génétique des populations de l’écrevisse des torrents.
Frequency of Dental Caries in Four Historical Populations from the Chalcolithic to the Middle Ages
A.-M. Grimoud,S. Lucas,A. Sevin,P. Georges,O. Passarrius,F. Duranthon
International Journal of Dentistry , 2011, DOI: 10.1155/2011/519691
Abstract: The majority of dental carie studies over the course of historical period underline mainly the prevalence evolution, the role of carbohydrates consumption and the impact of access to dietary resources. The purpose of the present investigation was to compare population samples from two archaeological periods the Chacolithic and Middle Age taking into account the geographical and socio economical situation. The study concerned four archaelogical sites in south west France and population samples an inlander for the Chalcolithic Age, an inlander, an costal and urban for the Middle Age. The materials studied included a total of 127 maxillaries, 103 mandibles and 3316 teeth. Data recorded allowed us to display that the Chalcolithic population sample had the lowest carie percentage and the rural inlander population samples of Middle Age the highest; in all cases molars were teeth most often affected. These ones differences could be explained according to time period, carious lesions were usually less recorded in the Chalcolithic Age than the Middle because of a lesser cultivation of cereals like in les Treilles Chacolithic population sample. In the Middle Age population samples, the rural inland sample Marsan showed the highest frequency of caries and ate more cereal than the coastal Vilarnau and the poor urban St Michel population samples, the first one ate fish and Mediterranean vegetal and fruits and the second one met difficulties to food access, in both cases the consumption of carbohydrates was lesser than Marsan population sample who lived in a geographical land convice to cereals cultivation. 1. Introduction Studies of dental caries over historical periods allow us to know and follow the evolution of the frequency of the disease and also its association with environmental resources, especially the relationship, now well established, between formation of caries, type of food consumed, and lifestyle [1–3]. Observations around the aetiology of carious lesions identify the role played by carbohydrates, with sugar [4] as the main factor involved in the increased prevalence of carious lesions, which arises with the cultivation of cereals and the possibility of cooking them, because cooking makes the carbohydrates soft, thus allowing them to stick to teeth, and, moreover, modifies the carbohydrate makeup by cutting the chains into shorter pieces [5, 6]. Overall, these modifications make the carbohydrate more cariogenic. Nevertheless, multiple factors appear to be involved in dental caries, including oral ecosystem compounds and salivary gland function [7].
New analysis software for Viking Lander meteorological data
O. Kemppinen, J. E. Tillman, W. Schmidt,A.-M. Harri
Geoscientific Instrumentation, Methods and Data Systems (GI) & Discussions (GID) , 2013, DOI: 10.5194/gi-2-61-2013
Abstract: We have developed a set of tools that enable us to process Viking Lander meteorological data beyond what has been previously publicly available. Besides providing data for new periods of time, the existing data periods have been augmented by enhancing the data resolution significantly. This was accomplished by first transferring the original Prime computer version of the data analysis software to a standard Linux platform, and then by modifying the software to be able to process the data despite irregularities in the original raw data and reverse engineering various parameter files. In addition to this, the processing pipeline has been streamlined, making processing the data faster and easier. As a case example of new data, freshly processed Viking Lander 1 and 2 temperature records are described and briefly analyzed in ways that have not been previously possible due to the lack of data.
New analysis software for Viking Lander meteorological data
O. Kemppinen,J. E. Tillman,W. Schmidt,A.-M. Harri
Geoscientific Instrumentation, Methods and Data Systems Discussions , 2012, DOI: 10.5194/gid-2-801-2012
Abstract: We have developed a set of tools that enable us to process Viking Lander meteorological data beyond what has been previously publicly available. Besides providing data for new periods of time, the existing data periods have been augmented by enhancing the data resolution significantly. This was accomplished by first transferring the original Prime computer version of the data analysis software to a standard Linux platform, and then by modifying the software to be able to process the data despite irregularities in the original raw data and reverse engineering various parameter files. In addition to this, the processing pipeline has been streamlined, making processing the data faster and easier. As a case example of new data, freshly processed Viking Lander 1 and 2 temperature records are described and briefly analyzed in ways that have not been previously possible due to the lack of data.
E. Brems, H. Brems, D. de Geest, Van hooger leven tot de vlag. Literatuuropvattingen in Vlaanderen 1920-1940
A.-M. Musschoot
BMGN : Low Countries Historical Review , 2002,
Abstract:
Ontologies for the Description of Mouse Phenotypes
G. V. Gkoutos,E. C. J. Green,A.-M. Mallon,A. Blake,S. Greenaway,J. M. Hancock,D. Davidson
Comparative and Functional Genomics , 2004, DOI: 10.1002/cfg.430
Abstract: Ontologies are becoming increasingly important for the efficient storage, retrieval and mining of biological data. The description of phenotypes using ontologies is a particularly complex problem. We outline a schema that can be used to describe phenotypes by combining orthologous axiomatic ontologies. We also describe tools for storing, browsing and searching such complex ontologies. Central to this approach is that assays (protocols for measuring phenotypic characters) describe what has been measured as well as how this was done, allowing assays to link individual organisms to ontologies describing phenotypes. We have evaluated this approach by automatically annotating data on 600 000 mutant mice phenotypes using the SHIRPA protocol. We believe this approach will enable the flexible, extensible and detailed description of phenotypes from any organism.
Stress and adhesion of chromia-rich scales on ferritic stainless steels in relation with spallation
Galerie, A.;Toscan, F.;Dupeux, M.;Mougin, J.;Lucazeau, G.;Valot, C.;Huntz, A.-M.;Antoni, L.;
Materials Research , 2004, DOI: 10.1590/S1516-14392004000100012
Abstract: the relation between chromia scale spallation during oxidation or cooling down of ferritic stainless steels is generally discussed in terms of mechanical stresses induced by volume changes or differential thermal expansion. in the present paper, growth and thermal stress measurements in scales grown on different ferritic steel grades have shown that the main stress accumulation occurs during isothermal scale growth and that thermal stresses are of minor importance. however, when spallation occurs, it is always during cooling down. steel-oxide interface undulation seems to play a major role at this stage, thus relating spallation to the metal mechanical properties, thickness and surface preparation. a major influence on spallation of the minor stabilizing elements of the steels was observed which could not be related to any difference in stress state. therefore, an original inverted blister test was developed to derive quantitative values of the metal-oxide adhesion energy. these values clearly confirmed that this parameter was influenced by scale thickness and by minor additions, titanium greatly increasing adhesion whereas niobium decreased it.
Effects of atmospheric conditions on ice nucleation activity of Pseudomonas
E. Attard, H. Yang, A.-M. Delort, P. Amato, U. P schl, C. Glaux, T. Koop,C. E. Morris
Atmospheric Chemistry and Physics (ACP) & Discussions (ACPD) , 2012,
Abstract: Although ice nuclei from bacterial origin are known to be efficient at the highest temperatures known for ice catalysts, quantitative data are still needed to assess their role in cloud processes. Here we studied the effects of three typical cloud conditions (i) acidic pH (ii) NO2 and O3 exposure and (iii) UV-A exposure on the ice nucleation activity (INA) of four Pseudomonas strains. Three of the Pseudomonas syringae strains were isolated from cloud water and the phyllosphere and Pseudomonas fluorescens strain CGina-01 was isolated from Antarctic glacier ice melt. Among the three conditions tested, acidic pH caused the most significant effects on INA likely due to denaturation of the ice nucleation protein complex. Exposure to NO2 and O3 gases had no significant or only weak effects on the INA of two P. syringae strains whereas the INA of P. fluorescens CGina-01 was significantly affected. The INA of the third P. syringae strain showed variable responses to NO2 and O3 exposure. These differences in the INA of different Pseudomonas suggest that the response to atmospheric conditions could be strain-specific. After UV-A exposure, a substantial loss of viability of all four strains was observed whereas their INA decreased only slightly. This corroborates the notion that under certain conditions dead bacterial cells can maintain their INA. Overall, the negative effects of the three environmental factors on INA were more significant at the warmer temperatures. Our results suggest that in clouds where temperatures are near 0 °C, the importance of bacterial ice nucleation in precipitation processes could be reduced by some environmental factors.
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