Objective: To explore communities' perspectives on the factors in the social food environment that influence dietary behaviours in African cities. Design: A qualitative study using participatory photography (Photovoice). Participants took and discussed photographs representing factors in the social food environment that influence their dietary beha...
An experimental study of single particle combustion is performed in a high temperature particle reactor. The particle degradation is simultaneously monitored by high magnification direct imaging and by shadowgraph imaging techniques giving access to the full behaviour of the particle even when enveloped by a flame. This allows tracing the time-reso...
This paper addresses the problem of categorizing plant images at the variety level, i.e. at a finer taxonomic grain than state-of-the-art studies usually working at the species level. It therefore introduces two new evaluation datasets of agro-biodiversity interest, each being related to concrete scenarios on large-scale plant resources. They have ...
Here, we report on a unique parasitoid wasp species of Toryminae reared from oothecae of praying mantids in the Mediterranean region. Based on the first available large specimen series, we transfer the species to Microdontomerus iridis comb. n. (from Torymus), describe the so far unknown male, designate a neotype, expand the known geographical dist...
Published in Multimedia Tools and Applications
This paper reports a large-scale experiment aimed at evaluating how state-of-art computer vision systems perform in identifying plants compared to human expertise. A subset of the evaluation dataset used within LifeCLEF 2014 plant identification challenge was therefore shared with volunteers of diverse expertise, ranging from the leading experts of...
Published in Mammal Research
In Southeast Asia, the conversion of native forests to oil palm plantations threatens tropical biodiversity, but very little is known about the impacts of oil palm cultivation on small carnivore species. To determine the diversity and occupancy of small carnivores within oil palm plantations and to investigate possible factors that might affect the...
Il est désormais fréquent que des chercheurs en sciences sociales soient sollicités dans des programmes de recherche sur l'environnement et la biodiversité. Ce type de collaboration mobilise une attention croissante à l'hétérogénéité des formes de production et de légitimation des savoirs, d'autant plus forte lorsqu'il s'agit de programmes qui impl...
Speeding up the collection and integration of raw botanical observation data is a crucial step towards a sustainable development of agriculture and the conservation of biodiversity. Initiated in the context of a citizen sciences project, the main contribution of this paper is an innovative collaborative workflow focused on image-based plants identi...
The use of consumer digital cameras or webcams to characterize and monitor different features has become prevalent in various domains, especially in environmental applications. Despite some promising results, such digital camera systems generally suffer from signal aberrations due to the on-board image processing systems and thus offer limited quan...
