Inequality factor decompotition under uniform additions property with applications to Cameroonian rural data

This paper proposes new factors decomposition methods for classical inequality indices such as Gini index, variance and squared coefficient of variations index. The approach consists in relaxing the normalization property in order to extend the natural decomposition to a decomposition rule which satisfies the uniform additions property. The regression-based method using the new formulations of components contributions is carried out. Empirical examples, using Cameroonian data, are provided to demonstrate the use of the procedure and to contrast our results to those based on Morduch and Sicular (2002) principle, especially in the case of the Gini index.Inequality factors decomposition; uniform additions property; regression-based. decomposition, Cameroon.

Measuring and explaining economic inequality: An extension of the Gini coefficient.

This paper proposes a new class of inequality indices based on the Gini’s coefficient. The properties of the indices are studied and in particular they are found to be regular, relative and satisfy the Pigou-Dalton transfer principle. A subgroup decomposition is performed and the method is found to be similar to the one used by Dagum when decomposing the Gini index. The theoretical results are illustrated by case studies, using Cameroonian data.Measuring inequality; Generalisation of the Gini index; Pigou-Dalton’s transfer; Subgroup decomposition.

One machine, one minute, three billion tetrahedra

This paper presents a new scalable parallelization scheme to generate the 3D Delaunay triangulation of a given set of points. Our first contribution is an efficient serial implementation of the incremental Delaunay insertion algorithm. A simple dedicated data structure, an efficient sorting of the points and the optimization of the insertion algorithm have permitted to accelerate reference implementations by a factor three. Our second contribution is a multi-threaded version of the Delaunay kernel that is able to concurrently insert vertices. Moore curve coordinates are used to partition the point set, avoiding heavy synchronization overheads. Conflicts are managed by modifying the partitions with a simple rescaling of the space-filling curve. The performances of our implementation have been measured on three different processors, an Intel core-i7, an Intel Xeon Phi and an AMD EPYC, on which we have been able to compute 3 billion tetrahedra in 53 seconds. This corresponds to a generation rate of over 55 million tetrahedra per second. We finally show how this very efficient parallel Delaunay triangulation can be integrated in a Delaunay refinement mesh generator which takes as input the triangulated surface boundary of the volume to mesh

Linear, efficient and symmetric values for TU-games

In this paper, we study values for TU-games which satisfy three classical properties: Linearity, efficiency and symmetry. We give the general analytical form of these values and their relation with the Shapley value and the Egalitarian value.

The Representation of the African Woman in Male-Dominated Society: A Study of Chinua Achebe’s Things Fall Apart and Amma Darko’s Beyond the Horizon

This paper highlighted and analysed the portrayals of the  traditional African women in selected postcolonial Anglophone African writers’ literary works such as Chinua Achebe’s Things Fall Apart (1958) and Amma Darko’s Beyond the Horizon (1995). Although they are of opposite sex, different nationalities and generations they condemn the phallocentric organisation of the African societies where women are nothing but naïve,  second-rank and sexually addicted people, reproducers, merecommodities and men’s appendage, just to name a few. Interestingly, Achebe and Darko are convinced that it is time to do justice to women. Therefore, post-colonial criticism offers the lenses through which female characters can regain power. This paper posited that some writers show concern for the relegation of the African woman to subordination because they are not satisfied with some African male writers’ misrepresentation of the African woman. For this reason, they decide to give proofs of the real role of the African woman in her community.Key Words: African woman, biased image, subordinate, patriarchy, exploit, fairnes