A Covering Tour Model for Planning Mobile Health Care Facilities in SuhumDistrict, Ghama

The provision of adequate primary health care in developing countries is often troublesome. The problem is to provide a sufficient number of facilities to be geographically accessible, yet few enough to be properly stocked and staffed. In many less developed countries accessibility problems are exacerbated by extensive rainy seasons in which travel is only possible on paved roads. Using the covering tour model we investigate the use of mobile facilities to resolve this dilemma in Suhum District, Ghana. The model minimizes a mobile facility's travel while serving all population centers within range of a feasible stop. Computational results show that in the rainy season the model cannot provide full coverage; over six percent of the population is beyond a covering distance of eight kilometers. In the dry season, 99 percent of the population can be served by a tour at a covering distance of seven kilometers.Beyond a distance of four kilometers, the dry season problem becomes a trade-off between the distance traveled by healthcare patrons and mobile facilities. These results illustrate the importance of flexibility of mobile systems: if accessibility cannot be provided in all seasons it may still be provided at favorable times of the year.     

THE MAXIMUM CAPTURE PROBLEM IN A WEIGHTED NETWORK*

ABSTRACT. In this paper, a conditional location problem on a weighted network is examined. Attraction functions are defined and the problem is formulated as a mixed integer program. A method which simultaneously locates an additional facility on the given network and optimizes its weight is then described. A numerical example is provided.     

Sur les traces de Cortés: L'expédition du Mexique d'après Le Monde illustré

Unlike L'Illustration, with which it competed under the Second Empire, the weekly Le Monde illustré, which first appeared in 1857 and which was protected by the imperial government, did not count among the political newspapers overtaxed under Napoléon the Third's repressive regime. For this reason, it made great strides thanks to its blind allegiance to a French imperialism that had asserted its authority during the Crimean war, but which spent itself during the war against Juárez and his republican partisans in Mexico. While the French liberal press criticized the Second Empire foreign policy, Le Monde illustré persisted in turning the Mexican war into an antijuarist pacification favorable to a new Latin colonial empire, as well as to an application of the Saint-Simonian doctrine on Mexican industry and economy. In order to achieve this, the illustrated reports on the expeditionary force, military operations, and French victories were a warmongering that aimed to place this campaign in the afterglow of the conquistadors' era, as well as to idealize the imperial army as a symbol of the French nation.     

Location and Pricing Decisions of a MultiStore Monopoly in a Spatial Market

Abstract.  This article presents an analysis of location and pricing decisions of a monopolist about to open several stores in a compact geographical space. The number of stores is made endogenous by the introduction of fixed costs. A novel methodology is developed, by which the firm's location and price decisions are represented as continuous functions defined over the geographical space. This modeling artifact generates a negligible error but simplifies the solution considerably and allows the derivation of several intuitive results. Although the focus is on one‐dimensional markets, it is shown that the method can easily be adapted to two‐dimensional markets.     

A comparison of two norms in archaeological seriation

Two norms frequently used in archaeological seriation are compared. Although these norms are equivalent in some particular cases, this is not true in general both from a computational point of view and in the archaeological sense.