Special issue: Respiratory viruses of domestic animals - Foreword

in Veterinary Research (2007), 38(2, FEB-MAR), 151-151

A special year for Fusarium Head Blight and associated mycotoxins in Luxembourg

in Toxicology Letters (2008), 180

Spécialisation spatiale et dynamisme régional dans l'espace industriel wallon : considérations méthodologiques

in Hommes et Terres du Nord (1985), (2), 110-117

This article is an attempt to explore various methods used to measure spatial specialisations and regional dynamism in wallon industry. At the same time, it treats the variables utilised and the spatial ... [more ▼]

This article is an attempt to explore various methods used to measure spatial specialisations and regional dynamism in wallon industry. At the same time, it treats the variables utilised and the spatial and temporal consequences of the choices. By examining the limits and performances of the various indices utilised, this article will attempt to suggest the use of various methodological tools for a more precise analysis of industrial function. [less ▲]

Specialist committee V.3 entitled "Materials and Fabrication Technology" of the 18th International Ship and Offshore Structure Congress

in Fricke, Wolfgang; Bronsart, Robert (Eds.) ISSC'12 -- International Ship and Offshore Structure Congress (2012)

After years of growth the global economic crisis has deeply affected the shipping industry. There are however clear signs of recovery in the last year. The shipbuilding industry has realised that, due to ... [more ▼]

After years of growth the global economic crisis has deeply affected the shipping industry. There are however clear signs of recovery in the last year. The shipbuilding industry has realised that, due to the crisis, new innovative designs and design and production methods are necessary to decrease operational costs, production costs and emissions, whilst meeting the changing rules and regulations. In this report ISSC committee V.3 discusses recent development in materials and fabrication technology. Chapter 2 focusses on worldwide trends in materials and fabrication methods. Developments in fabrication technologies, such as welding and corrosion protection are dealt with in Chapter 3. Applications of composite materials are increasing. Some main areas of applications and research in those areas are described in Chapter 4. A comparison of current worldwide standards is made in Chapter 5. Chapter 6 gives an overview of current developments in the linking of design and production in computer applications, thus increasing the efficiency of ship building. [less ▲]

Specialized « ochre » procurement strategies in the Transition context : the red pigments from the Châtelperronian of the Grotte du Renne, Arcy-sur-Cure (France)

Poster (2012, June 01)

In many reports of prehistoric pigment studies, these artefacts are considered as the testimony of past symbolic activities. The first step of the proceeding sequence, that is to say the acquisition of ... [more ▼]

In many reports of prehistoric pigment studies, these artefacts are considered as the testimony of past symbolic activities. The first step of the proceeding sequence, that is to say the acquisition of raw colouring material, is not well described and understood. Physico-chemical (SEM-EDS, XRD, TEM-EDX, µPIXE-µPIGE) and petrological analysis were carried out on the colouring materials excavated in the châtelperronian layers (40000-35000 B.P.) of the French site the Grotte du Renne in Arcy-sur-Cure. The Châtelperronian is one of the transitional techno-complexes, basically one of the last cultures made by Neanderthals in Europe. The physico-chemical data were related to the location of the colouring materials on the site, in association with exceptionally well preserved “hut” structures. It was thus possible to demonstrate that none of these materials, either red or black, was heated before being used, contrary to what had been assumed so far. The supply in colouring materials was as carefully organized as for mineral materials such as flint, for example; they were collected in different geological formations occasionally showing on the surface, close to the cave and at more than 30 km from the cave. The exploitation of these geological sites did not vary during the whole Châtelperronian period, and privileged materials which can easily be ground to powder. The set of colouring minerals from the Grotte du Renne reveals Neanderthals’ in-depth knowledge of mineral materials; they understood perfectly well their properties and qualities, and used them extensively, so that the raw colouring material was part of the livelihood and the Châtelperronian site must have been a literally dazzling sight, all red and black. [less ▲]

Speciation and phylogeography of the Southeast Asian Anopheles sundaicus complex.

in Infection, Genetics & Evolution (2007), 7(4), 484-93

Anopheles sundaicus s.l. is a malaria vector in coastal areas of Southeast Asia. Previous studies showed at least four distinct species within the complex. The present study investigated the ... [more ▼]

Anopheles sundaicus s.l. is a malaria vector in coastal areas of Southeast Asia. Previous studies showed at least four distinct species within the complex. The present study investigated the phylogeography and the status of A. sundaicus s.l. populations from Cambodia, Thailand, Malaysia and Indonesia with regard to A. sundaicus s.s. from Sarawak, Malaysian Borneo and A. epiroticus in Vietnam and Thailand. Three lineages recovered by analyses of Cyt-b and COI (mtDNA) confirmed the presence of A. sundaicus s.s. in Malaysian Borneo, the distribution of A. epiroticus from southern Vietnam to peninsular Malaysia, and recognised a distinct form in Indonesia that is named A. sundaicus E. The phylogenetic and demographic analyses suggest that the three species were separated during the Early Pleistocene (1.8-0.78 Myr) and experienced bottlenecks followed by a genetic expansion in more recent times. Based on the results and knowledge of the biogeography of the area, we hypothesise that the combination of cyclical island and refugium creation was the cause of lineage isolation and bottleneck events during the Pleistocene. [less ▲]

Speciation of five arsenic species (arsenite, arsenate, MMAAV, DMAAV and AsBet) in different kind of water by HPLC-ICP-MS

in Chemosphere (2007), 66(4), 738-745

Speciations and extinctions in a self-organizing critical model of tree-like evolution

in Journal de Physique I (1996), 6(4), 599-606

We study analytically a simple model of a self-organized critical evolution. The model considers both extinction and speciation events leading to the growth of phylogenetic-like trees. Through a mean ... [more ▼]

We study analytically a simple model of a self-organized critical evolution. The model considers both extinction and speciation events leading to the growth of phylogenetic-like trees. Through a mean-field like theory, we study the evolution of the local configurations for the tree leaves. The fitness threshold, below which life activity takes place through avalanches of all sizes is calculated. The transition between speciating (evolving) and dead trees is obtained and is in agreement with numerical simulations. Moreover, this theoretical work suggests that the structure of the tree is strongly dependent on the extinction strength. [less ▲]

Species assemblages and indicator species: The need for a flexible asymmetrical approach

in Ecological Monographs (1997), 67(3), 345-366

This paper presents a new and simple method to find indicator species and species assemblages characterizing groups of sites. The novelty of our approach lies in the way we combine a species relative ... [more ▼]

This paper presents a new and simple method to find indicator species and species assemblages characterizing groups of sites. The novelty of our approach lies in the way we combine a species relative abundance with its relative frequency of occurrence in the various groups of sites. This index is maximum when all individuals of a species are found in a single group of sites and when the species occurs in all sites of that group; it is a symmetric indicator. The statistical significance of the species indicator values is evaluated using a randomization procedure. Contrary to TWINSPAN, our indicator index for a given species is independent of the other species relative abundances, and there is no need to use pseudospecies. The new method identifies indicator species for typologies of species releves obtained by any hierarchical or nonhierarchical classification procedure; its use is independent of the classification method. Because indicator species give ecological meaning to groups of sites, this method provides criteria to compare typologies, to identify where to stop dividing clusters into subsets, and to point out the main levels in a hierarchical classification of sites. Species can be grouped on the basis of their indicator values for each clustering level, the heterogeneous nature of species assemblages observed in any one site being well preserved. Such assemblages are usually a mixture of eurytopic (higher level) and stenotopic species (characteristic of lower level clusters). The species assemblage approach demonstrates the importance of the 'sampled patch size,' i.e., the diversity of sampled ecological combinations, when we compare the frequencies of core and Satellite species. A new way to present species-site tables, accounting for the hierarchical relationships among species, is proposed. A large data set of carabid beetle distributions in open habitats of Belgium is used as a case study to illustrate the new method. [less ▲]

Species Differences in the Relative Densities of D1- and D2-Like Dopamine Receptor Subtypes in the Japanese Quail and Rats: An in vitro Quantitative Receptor Autoradiography Study.

in Brain, Behavior & Evolution (2009), 73(2), 81-90

Evidence has accumulated that the regulation of male sexual behavior by dopamine might not be the same in Japanese quail (and perhaps all birds) as it is in mammals. For example, the non-selective ... [more ▼]

Evidence has accumulated that the regulation of male sexual behavior by dopamine might not be the same in Japanese quail (and perhaps all birds) as it is in mammals. For example, the non-selective dopamine receptor agonist, apomorphine (APO), facilitates male sexual behavior in rats but inhibits it in quail. Although the general organization of the dopamine system is similar in birds and mammals, it is possible that the relative distribution and/or density of binding sites are different. We therefore compared the relative densities of D1-like and D2-like receptor subtypes in Japanese quail and rats, with the use of in vitro quantitative receptor autoradiography. Brain sections from 8 male rats and 8 male quail were labeled with [(3)H]SCH-23390 and [(3)H]Spiperone. In general we found a systematic species difference in the relative density of D1- vs. D2-like receptors such that the D2/D1 ratio is higher in quail than in rats in areas, known to be important target sites for dopamine action such as striatal regions or the preoptic area, which is also associated with activation of sexual behavior. This difference might explain the variation in the behavioral effectiveness of APO in rats as compared to quail; with a higher relative density of D2-like receptors in quail, a similar dose of APO would be more likely to activate inhibitory processes in quail than in rats. [less ▲]