Search results for "PES"
showing 10 items of 5212 documents
Disease dispersion as a spatial interaction: The case of Flavescence Dorée
2020
International audience; Flavescence dorée is a serious and incurable vine disease transmitted by an insect vector. Focusing on its spatial diffusion and on its control with pesticides, this paper investigates the private strategies of wine producers and their socially optimal counterparts. The socially optimal regulation has to address two externalities regarding private treatment decisions: (a) the insufficient consideration of collective benefits from controlling the vector populations; (b) the failure to take into account environmental damage related to pesticide application. The probability of infection is estimated on French data from a spatial econometric specification. Three alternat…
Invasive crayfish increase habitat connectivity
2012
Several studies have shown that distinct compartments of lake ecosystems are coupled via transportation of organic matter, nutrients and energy across habitat boundaries. Here we evaluate the potential of the invasive signal crayfish (Pacifastacus leniusculus (Dana)) to modify energy pathways in large boreal lakes. Using a stable isotope mixing model and calculation of the isotopic niches we estimated the contribution of different food sources to the diets of crayfish captured from different habitats, and from that inferred their potential to transport energy across the littoral-profundal gradient. The crayfish caught from the littoral area utilized mainly littoral food sources, whereas the…
La crise des intellectuels et ses avatars dans "Les Mandarins" de Simone de Beauvoir
2022
In the novel The Mandarins, Simone de Beauvoir shows the crisis of French intellectuals, namely writers facing ideological and political dilemmas after World War Two. Reflecting on the usefulness of their works, the main protagonists ask the fundamental question, namely why / for what to write and act. In the writer’s optics, two solutions are possible. On the one hand, the commitment, and the need for being aware of situations and actions. On the other hand, the idea of the autonomy of literature. This opposition seems to cause a failure of common expectations and hopes, conformism, collapse of values as well as love failures. The history of “broken illusions” of a known milieu allows the …
Chemical Composition and Evaluation of Insecticidal Activity of Calendula incana subsp. maritima and Laserpitium siler subsp. siculum Essential Oils …
2022
The problems of the environment and human health related to the use of synthetic and broad-spectrum insecticides have increasingly motivated scientific research on different alternatives and among these, the use of green systems, such as essential oils, have been explored. Several species of the Apiaceae and Asteraceae families, aromatic herbs rich in secondary bioactive metabolites, are used in the industrial field for pharmaceutical, cosmetic, and food purposes. Different essential oils extracted from some species of these families have shown acute toxicity and attractive and/or repellent effects towards different insects. In our work, we investigated the toxic potential of Calendula inca…
Soils, Past Landscapes and Cultural Heritage: Phytoliths as Indicators of Ancient Crops
2016
Soils, Past Landscapes and Cultural Heritage: Phytoliths as Indicators of Ancient Crops
Les crânes déformés de Saint-Etienne (Beaune, Côte d'Or, Ve-VIe siècles). Données archéologiques et anthropologiques
1995
The sector of the Saint-Étienne necropolis (Beaune), reveals the existence of two clearly separated zones which are characterized by different funeral and cultural practices: tomb architecture, archaeological material and artificially deformed crania. This seems to provide evidence of two distinct groups. A preliminary morpho-metrical study of four skulls and the examination of several CT scans of three of them, allow us to confirm the presence of artificial antero-posterior cranial deformations.
Species–area relationships in continuous vegetation: Evidence from Palaearctic grasslands
2019
Aim Species-area relationships (SARs) are fundamental scaling laws in ecology although their shape is still disputed. At larger areas, power laws best represent SARs. Yet, it remains unclear whether SARs follow other shapes at finer spatial grains in continuous vegetation. We asked which function describes SARs best at small grains and explored how sampling methodology or the environment influence SAR shape. Location Palaearctic grasslands and other non-forested habitats. Taxa Vascular plants, bryophytes and lichens. Methods We used the GrassPlot database, containing standardized vegetation-plot data from vascular plants, bryophytes and lichens spanning a wide range of grassland types throu…
Réponses de la plante et des microorganismes du sol aux changements environnementaux
2015
Lidmašīnas apkalpju atpūtas pieredze ārpus mājas bāzes
2015
ACMI apkalpes pavada ievērojamu laiku prom no mājām, kamēr strādā bāzēs ārpus dzimtenes. Šis pētījums parāda, ka šāda veida ilglaicīga uzturēšanās prasa īpašu pieeju darbinieku atpūtai, izmantojot ICAO ieteiktos Noguruma Riska Vadības praktiskos paņēmienus. Četras reģenerācijas pieredzes, darba nošķiršana no privātās dzīves, kontrole, relaksācija un meistarība – šīs uzvedības tika identificētas un korelēja ar 28 apkalpes locekļiem esot bāzē. Rezultāti parāda, ka aviācijas vadībai ir nepieciešams ieviest uzlabojumus līgumos ar ACMI apkalpēm, respektīvi, nodrošināt grafika stabilitāti, tādā veidā veicinot darbinieku kontroles sajūtu.
Profesionālās vides ietekmējošie faktori interno māsu praksē
2016
Bakalaura darba tēma - Profesionālās vides ietekmējošie faktori interno māsu praksē. Bakalaura tēma ir saistīta ar daudzie nelabvēlīgie faktori un apstākļiem medicīnas darba vietā, to kombinācija un iedarbība kuras var izraisīt patoloģiskas pārmaiņas un slimības visās organisma sistēmās. Pētījuma mērķis bija izpētīt profesionālās vides ietekmējošus riska faktorus internās māsas praksē. Pētniecības uzdevums bija savākt un analizēt informācijas avotus par internās māsu darba vides riska faktoriem un arodslimībām, izstrādāt aptaujas anketu medicīnas māsām, apkopot un analizēt aptaujas rezultātus, un izstrādāt secinājumus. Bakalaura darbā ir izvirzīta hipotēze: internās māsas praksē vidē tiek n…