Search results for "RCA"

Probing the Conformational States of a pH-Sensitive DNA Origami Zipper via Label-Free Electrochemical Methods

2021

Funding Information: Financial support from EPSRC DTP (grant EP/R513349/1), the Emil Aaltonen Foundation, the Sigrid Jusélius Foundation, the Jane and Aatos Erkko Foundation, and the Vilho, Yrjö and Kalle Väisälä Foundation of the Finnish Academy of Science and Letters is gratefully acknowledged. This work was carried out under the Academy of Finland Centers of Excellence Programme (2014–2019). We acknowledge the provision of facilities and technical support by Aalto University Bioeconomy Facilities and OtaNano—Nanomicroscopy Center (Aalto-NMC) and Micronova Nanofabrication Center. Publisher Copyright: © 2021 The Authors. Published by American Chemical Society DNA origami structures represe…

Mercosur en marcha

2004

Sometimes Pigs Fly

2020

The relationship between the Demeter cults and the offering of piglets is a cornerstone of many discussions about ancient Greek religion. However, this connection has rarely been supported by systematic zooarchaeological studies. The new excavations at the sanctuary of S. Anna greatly increase the zooarchaeological record of Sicily, while also providing an excellent case study for exploring the broader issues of ancient Greek ritual practice. Our results highlight the almost exclusive presence of pig bones, mostly belonging to very young individuals. The taphonomic analysis of the remains point to a cultic context, in which the piglets were used for sacrificial purposes and as part of sacre…

Animal husbandry in Sicilian prehistory: The zooarchaeological perspective from Vallone Inferno (Scillato, Palermo)

2023

Starting in the mid-6th millennium cal BCE, Neolithic groups occupied the midlands of Sicily. The economy of these groups was based primarily on livestock farming. Archaeological and archaeobotanical data indicate an intensification of livestock practices during the Early Bronze Age, leading to a change in the landscape in the form of more open forests. The Vallone Inferno rockshelter in the Madonie massif is one of the few sites that has been systematically excavated in these midlands, and has yielded evidence of Middle Neolithic and Early Bronze Age occupations. This work focuses on the study of prehistoric husbandry in the Sicilian midlands and highlands through the analysis of the Vallo…

Bifurcations in the elementary Desboves family

2017

International audience; We give an example of a family of endomorphisms of $\mathbb{P}^2(\mathbb{C})$ whose Julia set depends continuously on the parameter and whose bifurcation locus has non-empty interior.

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…

Dynamic instability in absence of dominated splittings.

2006

We want to understand the dynamics in absence of dominated splittings. A dominated splitting is a weak form of hyperbolicity where the tangent bundle splits into invariant subbundles, each of them is more contracted or less expanded by the dynamics than the next one. We first answer an old question from Hirsch, Pugh and Shub, and show the existence of adapted metrics for dominated splittings.Mañé found on surfaces a $C^1$-generic dichotomy between hyperbolicity and Newhouse phenomenons (infinitely many sinks/sources). For that purpose, he showed that without a strong enough dominated splitting along one periodic orbit, a $C^1$-perturbation creates a sink or a source. We generalise that last…

Unfolding of saddle-nodes and their Dulac time

2016

Altres ajuts: UNAB10-4E-378, co-funded by ERDF "A way to build Europe" and by the French ANR-11-BS01-0009 STAAVF. In this paper we study unfoldings of saddle-nodes and their Dulac time. By unfolding a saddle-node, saddles and nodes appear. In the first result (Theorem A) we give a uniform asymptotic expansion of the trajectories arriving at the node. Uniformity is with respect to all parameters including the unfolding parameter bringing the node to a saddle-node and a parameter belonging to a space of functions. In the second part, we apply this first result for proving a regularity result (Theorem B) on the Dulac time (time of Dulac map) of an unfolding of a saddle-node. This result is a b…

Influence de l'orientation des fibres sur un essai Arcan = Influence of fiber orientation on Arcan test data

2009

National audience; Ce papier présente les résultats d'une étude expérimentale portant sur le comportement d'éprouvettes ‘papillon' en verre/époxy, soumises à des chargements de cisaillement pur et de traction-cisaillement combinés, au moyen d'un dispositif Arcan. Des éprouvettes dont les fibres sont orientées parallèlement à la direction des entailles et d'autres pour lesquelles les fibres sont perpendiculaires à cette direction, respectivement désignées Mat31 et Mat32, ont été testées pour différents angles de sollicitation, dans une plage comprise entre 0° et 90°. Le mode de rupture observé pour les éprouvettes Mat31 est répétitif, alors qu'il dépend de la direction de la sollicitation po…

MODERATE DEVIATION PRINCIPLES FOR KERNEL ESTIMATOR OF INVARIANT DENSITY IN BIFURCATING MARKOV CHAINS MODELS

2021

Bitseki and Delmas (2021) have studied recently the central limit theorem for kernel estimator of invariant density in bifurcating Markov chains models. We complete their work by proving a moderate deviation principle for this estimator. Unlike the work of Bitseki and Gorgui (2021), it is interesting to see that the distinction of the two regimes disappears and that we are able to get moderate deviation principle for large values of the ergodic rate. It is also interesting and surprising to see that for moderate deviation principle, the ergodic rate begins to have an impact on the choice of the bandwidth for values smaller than in the context of central limit theorem studied by Bitseki and …