Peace, War and International Security: Economic Theories

This paper considers the economic theories that are relevant for the study of peace war and international security . It presents different levels of generality, starting with the big questions of international security, which are usually the domain of international relations, before moving to general economic theoretical perspectives and then focusing on some specific developments in economics and security. More specifically it reviews the economics of security, distinguishing neoclassical theories, Keynesian and institutional, Marxist, and monopoly capital, before discussing the issues involved in the debate between the schools of thought. The economics of conflict is then considered, starting with the approach economists have taken –mainly neoclassical, before considering more general political economy perspectives.Economics; Peace; war; security;

Peace, War and International Security: Economic Theories (trial entry)

This paper considers the economic theories that are relevant for the study of peace war and international security . It presents different levels of generality, starting with the big questions of international security, which are usually the domain of international relations, before moving to general economic theoretical perspectives and then focusing on some specific developments in economics and security. More specifically it reviews the economics of security, distinguishing neoclassical theories, Keynesian and institutional, Marxist, and monopoly capital, before discussing the issues involved in the debate between the schools of thought. The economics of conflict is then considered, starting with the approach economists have taken –mainly neoclassical, before considering more general political economy perspectives.Economics; Peace; war; security;

La race NDama. Quelques caractéristiques zootechniques

La trypanotolérance de la race NDama est un facteur très favorable à son développement dans les zones chaudes et humides infestées par la mouche tsé-tsé. Race de petit format, possédant une bonne fécondité, sa vitesse de croissance et sa conformation satisfaisantes lui confèrent des qualités bouchères indéniables. Les nombreuses observations recueillies au Centre de recherches zootechniques de Bouaké Minankro, en Côte-d'Ivoire, permettent à l'auteur de préciser quelques-unes de ses caractéristiques zootechnique

Recherches sur la dilution et la conservation du sperme de Chien

La dilution du sperme de chien au moyen d’une solution hypo tonique de citrate de soude-jaune d’œuf, ou d’une solution isoto nique de fructose-jaune d’œuf, augmente la durée de conserva tion utile jusqu’à une valeur de quatre jours. L’action favorable de ces dilueurs pourrait être due à la dimi nution ou à l’élimination des ions Na +

STABILITY ANALYSIS AND OPTIMAL CONTROL DESIGN FOR AC-DC POWER SYSTEM WITH CONSTANT POWER LOAD

This thesis studies the stability properties of an AC-DC system - a three-phase controlled rectifi�er - with constant power load (CPL) and proposes an optimal design for the system control. CPLs have been widely seen in power electronic applications. For example, motor drives and DC/AC inverters in advanced automotive systems may behave as CPLs. Due to their negative impedances, CPLs often impact the power quality and stability of an AC/DC system. This thesis considers a typical AC/DC system with constant power load, where the three-phase rectifi�er is originally controlled by two PI controllers. It is demonstrated that the PI control strategy obtains narrow stability margin. To overcome the limitation of PI control, a linear quadratic regulator with full state feedback is used to determine the optimal structure of the controller and tune the parameters of the controller and DC �filter. This method is shown to improve the stability margin of the AC-DC system tremendously

Multiscale Analysis of the Stress State in a Granular Slope in Transition to Failure

By means of contact dynamics simulations, we analyze the stress state in a granular bed slowly tilted towards its angle of repose. An increasingly large number of grains are overloaded in the sense that they are found to carry a stress ratio above the Coulomb yield threshold of the whole packing. Using this property, we introduce a coarse-graining length scale at which all stress ratios are below the packing yield threshold. We show that this length increases with the slope angle and jumps to a length comparable to the depth of the granular bed at an angle below the angle of repose. This transition coincides with the onset of dilatation in the packing. We map this transition into a percolation transition of the overloaded grains, and we argue that in the presence of long-range correlations above the transition angle, the granular slope is metastable.Comment: 11 pages, 14 Fig, submitted to PR

Pâturages artificiels en savanes à saison sèche peu marquée

Après un bref résumé des conditions climatiques de la région de Bouaké (République de Côte-d'Ivoire), les auteurs exposent les résultats obtenus par une étude comparée de quelques plantes introduites: techniques d'implantation, rythme d'exploitation, longévité des pâturages, productivité et valeur fourragère. Les auteurs indiquent ensuite quelques associations "graminées-légumineuse s" susceptibles d'être utilisées pour les sols locau

Le croisement jersiais x N'Dama en Côte-d'Ivoire. Analyse des performances des animaux demi-sang produits et élevés au Centre de Recherches Zootechniques de Minankro

Cent quatre-vingt-treize métis demi-sang jersiais x N'Dama (102 mâles et 91 femelles), ont été produits et élevés au Centre de Recherches zootechniques de Minankro Bouaké en Côte-d'Ivoire. Les auteurs analysent les performances observées sur ces animaux relatives à la croissance, aux qualités bouchères, à la reproduction et à la production laitière. La rusticité et l'excellent comportement des demi-sang dans un milieu d'endémicité de trypanosomoses, permet de conclure que leur vulgarisation en milieu paysan et leur élevage dans des conditions proches du système extensif intégral sont parfaitement envisageable