Search results for "edge"

No performance reduction at the present northern edge of Ambrosia artemisiifolia L. invasion range

2014

Plant populations at range edges may exhibit reduction of performances and fitness. In the case of biological invasions, such a reduction could be associated with a slowing down of the spread and explain the non-naturalization of a species outside its present invasion range. Common ragweed (Ambrosia artemisiifolia L.) is an ideal model to investigate such processes, since it is invasive in France but not naturalized in northern countries, such as Belgium and the Netherlands. In this study, we test if the performances of ragweed populations vary among different invasion zones. Three populations were selected in each of four invasion zones in Western Europe: 1) French invasion area; 2) northe…

Distribution of the weed flora in a small agricultural landscape

2023

Human capital and RD Driven Growth: analyse for France at regional level on the long run

2012

At the root of the Lisbon goal, for Europe, is placed the awareness for advocating a close link between growth and dissemination of advanced knowledge and innovation, on the one hand, and raising in general endowments in human capital, on the other hand, as to have power over the development of non-specific skills and boost efficiency. Much work in literature also stressed the interest of the position concerning traditional activities in the geography of innovation and links, in the long term, between the spatial distribution of longestablished skills and knowledge creation. Following Jones, in this approach, for which contribution to R&D and innovation explains half of the increase in weal…

Capturing learning in classroom interaction in mathematics: Methodological considerations

2015

International audience; This paper discusses issues of how to transcribe and analyze video-recordings when studying learning in small group work in mathematics. Since bodily features of interaction and the use of artefacts play important roles in mathematical reasoning, a multimodal approach to transcribing is necessary. Thus, the theoretical grounding for transcriptions has to be in accord with the perspective on learning adopted in the analysis. In the paper, the principles for studying what Radford (2000) refers to as knowledge objectification processes when learning mathematics will be discussed.

Cinema as Social Knowledge

2019

François Ribac discusses how the Beatles—within the field of popular music—gave substance to a technical and social organization that the cinema made culturally possible. Cinema, being just as much a technique as a way of organizing and hearing the world, introduced the Beatles and their sound engineers simultaneously to a nonnaturalistic use of sound and to rock “n” roll which made it possible for them to invent “a cinema for the ears.” Ribac describes how the methods and the temporality of the cinema as well as its conventions, division of labor, and the concept of the studio inspired the envisioning of a musical form that was disconnected from traditional music-making of the time.

The "terroir products", between environment, culture and territorial development

2009

International audience; In the double context of globalization and socio-ecological transition, numerous territories are in search of models of development granting a larger place in social dimension, in environment, in culture, and generally in immaterial resources. They also explore other kinds of governance based on collaboration, participation and global approach. In this regard, the mode of development constructed on the promotion of "terroir products" appears as a particularly promising way; on condition of course that the reference to the" terroir" is not a simple argument of marketing in the service of a product but the support of a true project of territory. The definition given in…

Rumour and Second-Hand Knowledge in Much Ado About Nothing

2015

International audience

The development of analogical reasoning : role of the executive component of inhibition

2011

We explored the development of the analogical reasoning. The traditional conception of this development is that it is dependent of knowledge accretion in children (Gentner, 1983, 1988; Goswami & Brown, 1989, 1990). We used a different approach which explains it as dependent of the development of the executive functions, particularly of the component of inhibition. The capacity of inhibition allows the suppression of the salient but irrelevant information for analogy-making in children. It is required while searching for the analogical solution. Nine studies involving a classical analogy-making task A : B :: C : ? were performed in this dissertation. The role of the capacity of inhibition wa…

Concepts, principes et outils de la méthodes Catalyse.

2005

Initially conceived in 1989, CATALYSE method of territorial intelligence is since 1994 the object of applications in about twenty regions of Europe. Its evolution is one research object of the European Network of Territorial Intelligence (ENTI/REIT). The communication exposes the fundamental concepts of the territorial intelligence. It clarifies the methodological - ethical and technological - principles which structure CATALYSE. It details tools proposed to the territorial actors of the sustainable development

Acoustic Topological Circuitry in Square and Rectangular Phononic Crystals

2021

International audience; We systematically engineer a series of square and rectangular phononic crystals to create experimental realizations of complex topological phononic circuits. The exotic topological transport observed is wholly reliant upon the underlying structure which must belong to either a square or rectangular lattice system and not to any hexagonal-based structure. The phononic system chosen consists of a periodic array of square steel bars which partitions acoustic waves in water over a broadband range of frequencies (∼0.5MHz). An ultrasonic transducer launches an acoustic pulse which propagates along a domain wall, before encountering a nodal point, from which the acoustic si…