48 research outputs found
Suivi de biofilms monospécifiques et plurispécifiques de Candida sp. sur plaque d'acier inoxydable en fonction du temps de développement et de la température
No full textNational audienc
Mixed Candida albicans and Candida krusei biofilm formation on stainless steel surface - evaluation of fungal killer toxin on two Candida species biofilms
No full textInternational audienc
Maëlle Dupon : voyage au cœur des sens
No full textMaëlle Dupon is a multi-faceted author: poet, short story writer and translator. A Montrealer by adoption, she continues to express herself mainly in occitan and french. From a youth spent travelling, discovering others — and in the process discovering herself — and from life's experiences — sometimes happy, sometimes heartbreaking or sensual — she nourishes a colourful, vibrant and committed work. La color lenta de la pluèja, the author's first collection, offers an initiatory journey into the depths of the self. The texts written a posteriori give a glimpse of a new aesthetic experimentation that invites the reader to appropriate the raw text in order to reflect its full depth
A stress-based gradient-enhanced damage model
No full textOne of the shortcomings of nonlocal damage models with a constant length scale parameter is the wrong prediction of damage initiation and propagation in correspondence of a strongly inhomogeneous strain field. This unphysical behavior can be corrected by considering an evolving length scale which is made a function of the stress state. Giry, Dufour and Mazars (2011) have recently proposed an approach, based on an integral nonlocal damage model, which solves the problem of incorrect initiation and propagation of damage as discussed by Simone et al. (2004). In this contribution, a similar approach is presented in a differential damage model, the gradient-enhanced damage model. The underlying idea, which is used to modify the governing equations, is explained. A new formulation of the finite element equations is derived, with attention to C0-continuity requirements. Representative examples will illustrate the performance of the proposed approach. Shortcomings of the model are pointed out and graphically explained using slight variations of the before-mentioned examples.Building EngineeringCivil Engineering and Geoscience
Successful Management of Spondylodiscitis Caused by Aspergillus nidulans: A Case Report and Literature Review
No full textWe report a case of spondylodiscitis caused by Aspergillus nidulans (SCAN). A. nidulans is a saprophytic fungus and emerging pathogen responsible for a variety of infections, although it is rarely implicated in osteoarticular infections. The patient was a 59-year-old immunocompromised patient with a history of lymphoma and splenectomy. Following diagnosis, the patient was promptly and effectively treated with voriconazole. A literature review underlines the distinctive features of the few case reports of SCAN, as well as the original features of the present case report
Médicaments et aliments : approche ethnopharmacologique = Medicines and foods : ethnopharmacological approach
No full textIn Pangani and Tanga, Tanzania, HIV-patients were treated in close collaboration of the author (medical doctor) and Mr Waziri Mrisho and Mr Saleh Wazili (traditional healers) with modern medicine and a decoction of herbs. Compared with a group, only treated with modern medicine, the group also treated with herbs showed significant increase of survival rate and significant improvement of body weight, Hemoglobine and Erythrocyte Sedimentation Rate. Literature studies, botanical classification and pharmaceutical analysis are done. Further clinical studies are conducted in Tanzania and Norway as well as in vitro studies. The treatment is cheap and locally available for a poor and highly affected population. Treatment must always be combined with health education and prevention. (Résumé d'auteur
Modelling dynamic tensile failure of quasi-brittle materials using stress-enhanced nonlocal models
No full textThe development of realistic numerical tools to efficiently model the response of concrete structures subjected to close-in detonations and high velocity impacts has been one of the major quests in defense research. Under these loading conditions, quasi-brittle materials undergo a multitude of failure (damage) mechanisms. Dynamic tensile failure (e.g. spalling), characterized by a significant strength increase associated with loading rate, has revealed to be particularly challenging to represent. This phenomenon has been modeled by means of continuous damage mechanics in the last decades. To minimize pathological mesh sensitivity, a nonlocal formulation is generally considered. Nevertheless, these models fail to properly represent damage initiation and growth around discontinuities, such as notches, damage areas and free boundaries. These inconsistencies are the consequence of using a fixed interaction domain (characteristic length) in the nonlocal formulation. In spite of limited experimental knowledge about the definition of the characteristic length parameter, there is now consensus that this quantity is not constant. In this contribution, an enhanced nonlocal model, where the interaction domain of any gauss point contracts or expands according to the stress-state of its neighbors, is used. This formulation was coupled to the well-known Mazars damage model and implemented within the framework of LS-DYNA using a fully explicit computation scheme. Two sets of numerical studies are presented in this paper. One shows the applicability and limitations of the implemented explicit algorithm to compute nonlocal quantities. The other shows that with this stress-enhanced regularization model it is possible to represent damage initiation and growth more realistically and correct the inconsistencies emerging from the traditional nonlocal formulations.Structural EngineeringCivil Engineering and Geoscience
High growth entrepreneurs, public policies and economic growth
No full textThis paper investigates whether the presence of ambitious entrepreneurs is a more important determinant of national economic growth than entrepreneurial activity in general. We use data from the Global Entrepreneurship Monitor to test the extent to which high growth ambitions of entrepreneurs affect GDP growth for a sample of 36 countries. Our results suggest that ambitious entrepreneurship contributes more strongly to macro-economic growth than entrepreneurial activity in general. We find a particularly strong effect of highexpectation entrepreneurship for transition countries. These results are interpreted in light of the ongoing debate about public policies designed to stimulate high growth start-ups.
