Avant-propos

Sanlaville Paul. Avant-propos. In: Quaternaire et préhistoire du Nahr el Kébir septentrional. Les débuts de l'occupation humaine dans la Syrie du Nord et au Levant. Travaux de la RCP 438, sous la direction de Paul Sanlaville. Lyon : Maison de l'Orient et de la Méditerranée Jean Pouilloux, 1979. p. 5. (Collection de la Maison de l'Orient méditerranéen. Série géographique et préhistorique, 9

Les données fondamentales du dvenir de la politique étrangère canadienne : Essai de synthèse

This paper proposes to grasp the main issues of Canadian foreign policy in the eighties by using an analysis framework based on the concepts of fragmentation, continentalism and diversification, considered as the intervening variables in the process of explaining Canada's international behaviour. Emphasizing the explanatory variables of the three phenomena (fragmentation, continentalism, diversification), the study demonstrates their complexity, namely the multiplicity of their causes, and underlines some of their basic characteristics, such as the structural sources of Canadian fragmentation in foreign policy - closely relate d to the nature of the country's economy and its links with the United States -, the ambiguity and shortcomings of the continentalist option, and the contradictions of the diversification policies. Beyond that, the paper attempts to indicate the interrelation of the three phenomena, their constant and circular interaction, and their future directions. Finally, the text deals with the question of a general theoretical framework for the study of these main issues in Canadian foreign policy

A complete set of independent and physically meaningful invariants in the mechanics of solids reinforced by two families of fibres

It has recently been shown [2, 3] that only seven of the classical deformation invariants employed in hyperelasticity of solids reinforced by two families of unidirectional fibres are independent. This short communication demonstrates a manner in which such a set of seven invariants is conveniently identified without much deviation from well-known features that characterise their classical counterparts. It also shows that, unlike several of their classical counterparts, these newly identified invariants have all their own physical meaning. This new development is immediate applicable on mass-growth problems of tissue that preserve fibre direction [1] and, notably, on problems involving mass-growth of a circular tube reinforced by two families of helices wound symmetrically around the tube in opposite directions