Search results for "Habit"
showing 10 items of 1816 documents
Hermé (Seine-et-Marne), Carrière SPM-Synéos d'Hermé : Tranche 6 des diagnostics archéologiques : rapport de diagnostic
2022
L’opération archéologique menée à Hermé, carrière Synéos (SPM) - tranche 6 des diagnostics archéologiques a permis de mettre au jour des occupations diachroniques néolithique et protohistorique.Ce diagnostic s’est déroulé sur deux parcelles distinctes pour une surface globale de 102 922 m2, une première au lieudit le Château Duduit et la seconde au lieudit La Patûre aux Bœufs.Sur l’emprise du Château Duduit nous avons mis au jour un petit amas de vingt-cinq pièces lithiques daté du Néolithique. Le diagnostic de 2022 a permis de mettre au jour une seule chaîne opératoire (débitage d’éclats par percussion dure) réalisée à partir de matériaux locaux pour la fabrication d’outils tels que les ra…
Oceanographic control on shell growth of Arctica islandica (Bivalvia) in surface waters of Northeast Iceland — Implications for paleoclimate reconstr…
2015
Absolutely dated, annually resolved sea surface temperature records from middle to higher latitudes covering long time intervals are crucial to better understand the climate system. Such data can potentially be obtained from variations in shell growth of long-lived bivalves such as Arctica islandica. This study presents the first statistically robust 178-yr long composite chronology (covering 1835–2012) based on sixteen live-collected and subfossil specimens of A. islandica from unpolluted, shallow waters of Northeast Iceland. Between 1875 and 1996, up to 43% of the variation in annual shell growth was explained by SST during February to September. Faster growth occurred when temperatures w…
Hume en Deleuze: los primeros lineamientos del empirismo trascendental
2012
Deleuze gustaba de parangonar su quehacer filosófico con una suerte de patchwork o collage: un pensamiento al estilo Arlequín, abigarrado y hecho de fragmentos no totalizables. Tal es el pluralismo (o empirismo) reivindicado por el filósofo francés, y también su resultado: un bizarro mosaico hecho de encuentros o téléscopages entre autores aparentemente no relacionados. No obstante, el caso de Empirismo y subjetividad (1953) resulta un tanto extraño: no parece encajar en este complejo puzzle, y la infravaloración de la que adolece en numerosos comentarios sobre Deleuze tiende a reforzar ese prejuicio. Por el contrario, nos proponemos mostrar que este estudio sobre Hume contiene las primeras…
Supercritical fluid crystallization of adipic acid using urea as habit modifier
2008
The crystal morphology of adipic acid mediated by the action of urea as additive has been investigated using the supercritical antisolvent precipitation (SAS). The process was performed using acetone and carbon dioxide as solvent and antisolvent, respectively. The effect of urea concentration in the liquid solution and of precipitation pressure on the crystal habit was investigated; the products were characterized by scanning electron microscopy (SEM), X-ray powder diffraction (XRPD), differential scanning calorimetry (DSC), and infrared spectrometry (FT-IR). Urea was found to be very effective in modifying the crystal habit of adipic acid from needle-like shape with a length of several hun…
Sensory and sympathetic correlates of heat pain sensitization and habituation in men and women
2012
Background Habituation and sensitization are important behavioural responses to repeated exposure to painful stimuli, but little is known about the factors determining sensory, affective and sympathetic habituation to repeated pain stimulation in men and women. Methods Thirty volunteers (15 women) underwent a standardized heat pain paradigm spread over 8 consecutive days. At the beginning of the experiment, personality dimensions, coping strategies and pain catastrophizing thoughts were determined. Receiving a series of 10 blocks of six painful heat stimuli a day, participants rated pain intensity and unpleasantness. Skin conductance was recorded throughout the sessions. Results and Conclus…
Impact of a social parasite on ant host populations depends on host species, habitat and year
2011
Parasites often affect the abundance and life-history traits of their hosts. We studied the impact of a social parasite - a slavemaking ant - on host ant communities using two complementary field manipulations. In the first experiment, we analysed the effect of social parasite presence on host populations in one habitat. In a second experiment, conducted in two habitats, we used a cross-fostering design, analysing the effect of sympatric and allopatric social parasites. In the first experiment, host colonies benefited to some extent from residing in parasite-free areas, showing increased total production. Yet, in the second experiment, host colonies in plots containing social parasites were…
Ecological differentiation and reproductive isolation of two closely related sympatric species of Oenanthe (Apiaceae)
2010
Oenanthe conioides is a lower Elbe endemic plant species growing in the freshwater tidal zone around Hamburg (Germany). Its closest relative Oenanthe aquatica is widely distributed in Eurasia and grows in calm and shallow freshwater. The two species differ in habitat requirements but are otherwise sympatrically distributed, suggesting that ecological divergence has to be maintained in the face of gene flow. In the present study, we investigated ecological differentiation and reproductive isolation in these two species. An amplified fragment length polymorphism analysis found clear genetic differentiation between the two species implying reproductive isolation. A reciprocal transplantation e…
Systematics of European coastal anchovies (genus Engraulis Cuvier).
2021
Reports of morphological differences between European anchovy (Engraulis cf. encrasicolus) from coastal and marine habitats have long existed in the ichthyologic literature, and have given rise to a long-standing debate on their taxonomic status. More recently, molecular studies have confirmed the existence of genetic differentiation between the two anchovy ecotypes. Using ancestry-informative markers, we show that coastal anchovies throughout the Mediterranean share a common ancestry, and that substantial genetic differentiation persists in different pairs of coastal/marine populations despite the presence of limited gene flow. On the basis of genetic and ecological arguments, we propose t…
Simulation d'un transport spontané non régulé, par un système multi-agents
2009
International audience; Les Systèmes Multi-Agents constituent aujourd'hui une approche prisée par les géographes pour modéliser et simuler des systèmes complexes par une approche individu centrée. Nous proposons de simuler un transport spontané non régulé (donc peu contraint), et très dynamique (type taxi-brousse) basé sur deux agents : des taxis et des villageois. Cet article résumé est issu d'un travail collectif de plusieurs chercheurs à la formation MAPS** (Modélisation multi-agents appliquée aux phénomènes spatialisés) de juin 2009, suivi d'un développement particulier réalisé à l'UMR ESPACE*.
Reconfiguration du modèle conjugal à l'heure de l'hyperconnectivité : TIC et territoires de l'intime
2014
Online devices are part of our daily lives, fundamentally changing our habits and practices,especially as regards relationships as well as interpersonal and social communication.In this doctoral research, the aim was to analyse the ways in which Information and CommunicationTechnologies (ICTs) have somehow ‘reshaped’ the traditional conjugal model.Indeed, more than just technical devices, ICTs are communicational and even ‘transitional’devices. They are means of strategies and issues within the couple and the family. Theseincreasingly nomadic technologies question the couple regarding its foundations. First ofall, the phenomenon of hyper connectivity (or ‘continuous connectivity’) creates a…