Search results for "communautés"
showing 10 items of 52 documents
Apports des réseaux sociaux dans les SI Une application à la gestion de la relation client
2013
National audience; Depuis quelques années, le Web s'est transformé en une plateforme d'échange. Le métier de gestion de relation client doit évoluer, se connecter aux réseaux sociaux et mettre l'entreprise au coeur des échanges. Nous proposons dans cet article une approche de détection de communautés, de clients d'une entreprise, basée sur le comportement explicite et implicite des clients. Pour cela, nous définissons une mesure de similarité, entre un utilisateur et un tag, qui prend en compte la notation et la consultation des ressources ainsi que les contacts des utilisateurs. Nous validons cette approche sur une base exemple
Apports des réseaux sociaux pour la gestion de la relation client
2014
National audience; Depuis quelques années, le Web s'est transformé en une plateforme d'échanges. La gestion de relation client doit évoluer pour tirer partie des données disponibles sur les réseaux sociaux et mettre l'entreprise au coeur des échanges. Nous proposons dans cet article une approche générique de détection de communautés de clients d'une entreprise, basée sur leur comportement explicite et implicite, intégrant des données de sources diverses. Nous définissons une mesure de similarité, entre un utilisateur et un tag, prenant en compte la notation et la consultation des ressources et le réseau social de l'utilisateur. Nous validons cette approche sur une base exemple en utilisant …
La sensibilité des communautés microbiennes à une augmentation de la température augmente quand la biodégradabilité de la ressource organique baisse
2014
La sensibilité des communautés microbiennes à une augmentation de la température augmente quand la biodégradabilité de la ressource organique baisse. 12. Journées d'Etude des Sols
Médias sociaux et gestion de communautés - applications dans le domaine de la gestion de la relation client
2018
Customer relationship management (CRM) is a term that emerged in the middle of the 1990's, and that is often used to describe computerized tools that provide services to consumers before, during and after a sale.These consumers have followed the transformation of the Web that has happened in the last few years, where each user becomes a supplier of content using tools like, amongst others, social networks by sharing resources, content, and annotating. General use social networks, such as Facebook or Twitter, are now used daily by a very large number of users.Companies have to follow this evolution and include social networks as a new communication channel in order to interact with their cli…
Temporal dynamics of arable weeds communities assembly : interactions between farming practices and ecological processes across crop sequences
2018
Understanding how farming practices affect weed community assembly in arable fields is a core challenge of agro-ecology. Weeds are supposed to share particular ecological characteristics that allow them to colonize arable fields despite environmental constrains exert by farming practices. In addition, interactions between ecological processes operating during a cropping season (eg: abiotic filtering) and at the scale of crop succession (eg: temporal dispersal) are supposed to drive weed community assembly in arable fields. These two hypotheses have been tested in my phD work.First, we compared a pool of weed species to a pool of non-weed herbaceous plants based on several functional traits …
Comparison of different tillage systems in organic farming : effect of soil structure and organic matter repartition on soil micro-organisms and thei…
2009
Over the last decades, the surface traditionally ploughed has tended to decrease and replaced by shallow working tillage techniques without soil inversion, i.e., no tillage or reduced tillage with tines or discs. These techniques were mostly developed in conventional farming systems but nowadays they are also developed in organic farming systems. Nevertheless, these tillage techniques could generate crop nutrients deficiencies and a deterioration of soil structure, especially during the first years of their application. As the use of synthetic fertilizers is forbidden in organic farming, a decrease of the soil fertility could be very detrimental for crop growth. Indeed, soil micro-organisms…
Dynamique et assemblage des communautés adventices : Approche par modélisation statistique
2011
To develop solutions for a productive and sustainable agriculture, principles, theories, andmethods of ecology may contribute to understand the biological processes governing the agroecosystem.The present case study was based on data collected by a network of observatories of weeds covering the whole of France (‘Biovigilance Flore’) and aimed at establishing forrules governing the assemblage and dynamics of weed communities in fields grown with annual crops. We particularly studied the possible relationships between species within acommunity, as well as the relationships between communities and their environment. Analyses were based on species abundances to take account of their effect on c…
Caractérisation de la distribution spatiale des communautés microbiennes du sol et de ses déterminants à l’échelle du paysage
2014
International audience; Depuis plusieurs années, des approches biogéographiques ont été développées pour mieux caractériser la distribution spatiale des communautés microbiennes du sol, comprendre les processus écologiques mis en œuvre et identifier les filtres environnementaux déterminant leur diversité et leur structure. Ces approches ont été mises en œuvre à différentes échelles spatiales allant de celle de la parcelle agricole à celle d’un territoire et d’un continent. Elles ont permis de mettre en évidence que les communautés microbiennes du sol sont distribuées suivant des patterns biogéographiques non aléatoire et que ces dernières sont soumises à des processus déterministes (sélecti…
Response of soil bacterial communities to the incorporation of crop residues : influence of agricultural practices and link with the soil biological …
2010
The effect of the location of wheat residues (soil surface vs. incorporated in soil) on their decomposition and on soil bacterial communities was investigated by the means of a field experiment. Bacterial-Automated Ribosomal Intergenic Spacer Analysis (B-ARISA) of DNA extracts from residues, detritusphere (soil adjacent to residues), and bulk soil evidenced that residues constitute the zone of maximal changes in bacterial composition. However, the location of the residues influenced greatly their decomposition and the dynamics of the colonizing bacterial communities. Sequencing of 16S rRNA gene in DNA extracts from the residues at the early, middle, and late stages of degradation confirmed …
DIAGSOL : development of a new functional marker of exposure to herbicides B-triketones in an agricultural soil
2020
Numerous herbicides target an enzyme found not only in weeds but also in « non-target organisms » such as microorganisms. This proof-of-concept study aims to use microbial gene encoding the targeted enzyme or the targeted enzyme itself as a marker for herbicide exposure in soils. The hppd gene and the encoded enzyme (HPPD; 4-hydroxyphenylpyruvate dioxygenase), targeted by B-triketone herbicides, are the subject of this study. In silico analyses reveal that the hppd gene is spread out in all bacterial phyla. Primers specific to this gene were designed. This primer pair is used to measure the abundance, the composition and the diversity of the hppd bacterial community in soil microcosms expos…