Search results for "Mixed"
showing 10 items of 783 documents
A thermodynamically consistent cohesive-frictional interface model for mixed mode delamination
2016
Abstract A new interface constitutive model based on damage mechanics and frictional plasticity is presented. The model is thermodynamically consistent, it is able to accurately reproduce arbitrary mixed mode debonding conditions and it is proved that the separation work is always bounded between the fracture energy in mode I and the fracture energy in mode II. Analytical results are given for proportional loading paths and for two non-proportional loading paths, confirming the correct behavior of the model for complex loading histories. Numerical and analytical solutions are compared for three classical delamination tests and frictional effects on 4ENF are also considered.
Titanium and zirconium complexes containing the new 2,3-dimethyl-1,4-diphenylcyclopentadienyl ligand. Synthesis, characterization and polymerization …
2004
Abstract An easy and inexpensive three-step synthesis of new 2,3-dimethyl-1,4-diphenylcyclopentadiene (3) ligand and the titanium and zirconium homometallocene dichlorides [TiCl2(η5-C5H-2,3-Me2-1,4-Ph2)2] (4), [ZrCl2(η5-C5H-2,3-Me2-1,4-Ph2)2] (5), and the mixed ligand zirconium complex [ZrCl2(η5-C5H-2,3-Me2-1,4-Ph2)(η5-C5H5)] (6) prepared thereof are described. The polymerization of ethene using 4–6/MAO catalysts revealed that zirconocene complexes 5 and 6 displayed moderate and high activity, respectively, whereas the titanium catalyst 4/MAO was inactive. The crystal structures of 4 and 5 were determined by X-ray crystallography.
INSTABILITY OF HAMILTONIAN SYSTEMS IN THE SENSE OF CHIRIKOV AND BIFURCATION IN A NON LINEAR EVOLUTION PROBLEM EMANATING FROM PHYSICS
2004
We prove the existence of a minimal geometrico-dynamical condition to create hyperbolicity in section in the vicinity of a transversal homoclinic partially hyperbolic torus in a near integrable Hamiltonian system with three degrees of freedom. We deduce in this context a generalization of the Easton's theorem of symbolic dynamics. Then we give the optimal estimation of the Arnold diffusion time along a transition chain in the initially hyperbolic Hamiltonian systems with three degrees of freedom with a surrounding chain of hyperbolic periodic orbits .In a second part, we describe geometrically a mechanism of diffusion studied by Chirikov in a near integrable Hamiltonian system with three de…
Developing sustainable food : the role of consumer liking in optimization of pea yogurt
2016
International audience; In the development of new food consumers’ acceptability is a critical factor. This study aimed at evaluating the possibility to introduce pea proteins as new fermented food. For this purpose, mixtures of cow and pea milks with different ratios of pea (0, 10, 20, 30, 40 and 100%) were fermented with French commercial yogurt-ferment. Consumer acceptability in two European countries: France (Western Europe) and Bulgaria (Southeastern Europe) was investigated. 60 Bulgarian and 70 French panelists were asked to rate: overall acceptability, appearance, odor, taste and texture on a hedonic scales going from 1 (I do not like at all) to 7 (I like very much). The ANOVA showed …
Effect of composition information on the perception of innovative beverages mixing animal and plant ingredients by consumers
2021
We studied the reaction of consumers and non-consumers of plant-based alternatives towards beverages mixing cow milk with soy juice or oat juice. We focused on the liking of these products and on the perceived nutritional and environmental quality. We compared the results obtained by presenting the products with or without composition information, with two types of composition information (plant-based or mixed) and between consumers and non-consumers of plant-based alternatives. We found that the plant-based composition information increased the appreciation of products containing oat. Both composition information had a similar impact on the perceived nutritional quality. The mixed composit…
Modelling codling moth damage as a function of adult monitoring and crop protection: A survival generalized linear mixed model approach with time var…
2008
; The codling moth (Cydia pomonella) is responsible for most insecticide treatments in pear and apple orchards. In a context of reduction in pesticide use, we aim at better understanding factors that affect codling moth damage intensity. We modelled the link between the proportion of damaged fruits and both constant covariables (type of orchard: pear or apple, organic or not, with or without mating disruption) and time-varying covariables (weekly counts of adults and number of insecticide treatments). Observations were collected in 40 orchards in south-eastern France. We found that damage intensity increased with the number of adults trapped. An analysis of the random orchard effect indica…
Les objets du Bronze moyen récemment découverts à Chalonnes-sur-Loire (Maine-et-Loire)
2011
Among a set of objects accidentally discovered in 2003 at Chalonnes- sur-Loire (Maine-et-Loire, France), a Middle Bronze Age hoard has been identified. The other objects, including a triangular side scraper, are dated from the Late Bronze Age and will be studied later. These eleven Middle Bronze Age objects (called "the Belvédère set" in this paper) are two frag- ments of chisels, a fragment of the handle of another flanged tool, a fragment of the handle of a flanged axe belonging to an eastern type (Porcieu-Amblagneu or Langquaid or some variants), two fluted flanged axes with a rare lateral pattern, two simple undecorated bracelets, and three pieces of bracelets of the Drône type. They…
Anticipated future of Latvia and Russia during a global economic crisis: A mixed methods perspective
2014
This cross-cultural study explored subjective predictors of more positive evaluation of the future of the country during a global socioeconomic crisis. A sequential mixed-method design was chosen for an exploration of students? expectations in Russia and Latvia as countries contrasting in macro-contextual conditions. In 2009, Study 1 was designed as a thematic analysis of essays on topic ?The Future of Latvia/Russia?. The results demonstrated that the future of a country is anticipated by taking into account external influences, the present of the country, and its perceived power and stability. In 2011, Study 2 involved these themes as independent variables in a multiple regression model. T…
Molecular Basis for Endocrine Disruption by Pesticides Targeting Aromatase and Estrogen Receptor
2020
The intensive use of pesticides has led to their increasing presence in water, soil, and agricultural products. Mounting evidence indicates that some pesticides may be endocrine disrupting chemicals (EDCs), being therefore harmful for the human health and the environment. In this study, three pesticides, glyphosate, thiacloprid, and imidacloprid, were tested for their ability to interfere with estrogen biosynthesis and/or signaling, to evaluate their potential action as EDCs. Among the tested compounds, only glyphosate inhibited aromatase activity (up to 30%) via a non-competitive inhibition or a mixed inhibition mechanism depending on the concentration applied. Then, the ability of the thr…