The Branch and Bound (B&B) algorithm is one of the most used methods to solve in an exact way combinatorial optimization problems. In a previous article, we proposed a new approach of the parallel B&B algorithm for distributed systems using the farmer-worker paradigm. However, the new farmer-worker approach has a disadvantage: some nodes of the B&B tree can be explored by several B&B processes....

This study considers a quantity discount problem between a single seller (poultry famer) and two buyers (retailers). The poultry farmer’s inventory level increases due to the increase in the weight of the fowls. The retailers purchase fresh chicken meat from the poultry farmer, the inventory levels of the retailers are therefore depleted due to the combined effects of its demand and deteriorati...

This paper uses the old Keynesian representative agent model developed by Roger E. A. Farmer [Expectations, Employment and Prices. New York: Oxford University Press (2010)] to answer two questions: (1) Do increased government purchases crowd out private consumption? (2) Do increased government purchases reduce unemployment? Farmer compared permanent tax-financed expenditure paths and showed tha...

We consider the population dynamics of two competing species sharing the same resource, which is modeled by the carrying capacity term of logistic equation. One species (farmer) increases the carrying capacity in exchange for a decreased survival rate, while the other species (exploiter) does not. As the carrying capacity is shared by both species, farmer is altruistic. The effect of continuous...

The average lifetime of sows as observed in production herds is primarily influenced by management decisions. Usually the farmer decides to cull a sow, either because he expects that a gilt's average productivity is higher than the marginal productivity of the sow, or because the current number of sows exceeds the production capacity, e.g. in the farrowing department. Several studies have shown...

Paul E Farmer professor 1 2 , Cameron T Nutt research fellow , Claire M Wagner research fellow , Claude Sekabaraga senior health financing specialist, Tej Nuthulaganti human resources for health program director, Jonathan LWeigel doctoral candidate, Didi Bertrand Farmer director of community health and social development , Antoinette Habinshuti deputy director of Rwanda progammes , Soline Dusab...

In ‘Comments on Theeuwes and Riemersma’s Revisit of Daytime Running Lights’ Williams and Farmer ( 1996) comment on a paper we published in Accident Analysis and Prevention. In this paper we show that the original claim by Andersson and Nilsson ( 198 1) that the nationwide implementation of Daytime Running Lights (DRL) in Sweden resulted in a reduction of multiple daytime accidents was not warra...

Classical Kaposi's sarcoma (KS) typically affects elderly men of Mediterranean and Jewish origin. We present an unusual case of classical KS in a human immunodeficiency virus (HIV) negative elderly farmer from rural Nigeria. He had multiple brownish nodules and plaques on both lower extremities associated with lymphoedema. Histopathological examination of a biopsy of the skin nodule confirmed t...