OTIMIZAÇÃO DO PROCESSO DE INSERÇÃO AUTOMÁTICA DE COMPONENTES ELETRÔNICOS EMPREGANDO A TÉCNICA DE TIMES ASSÍNCRONOS

Este trabalho apresenta um sistema computacional que busca otimizar o processo de inserção automática de componentes eletrônicos com a máquina Panasert AVK, baseada na técnica de times assíncronos (A-Teams). É feita a formulação do problema de inserção e apresentada a arquitetura do sistema. Por último, são apresentados os resultados obtidos e conclusões inferidas, demonstrando a viabilidade da utilização desta técnica nesta classe de problemas.<br>This paper presents a computational system which aims to optimize the automatic insertion process of electronic components with the Panasert AVK machine, based on asynchronous teams (A-Teams). A formulation of the insertion problem is proposed and the architecture of the system is presented. Finally, the obtained results and inferred conclusions are presented, showing the viability of this technique when applied in this class of problems

Survival costs of reproduction are mediated by parasite infection in wild Soay sheep

A trade-off between current and future fitness potentially explains variation in life-history strategies. A proposed mechanism behind this is parasite-mediated reproductive costs: individuals that allocate more resources to reproduction have fewer to allocate to defence against parasites, reducing future fitness. We examined how reproduction influenced faecal egg counts (FEC) of strongyle nematodes using data collected between 1989 and 2008 from a wild population of Soay sheep in the St. Kilda archipelago, Scotland (741 individuals). Increased reproduction was associated with increased FEC during the lambing season: females that gave birth, and particularly those that weaned a lamb, had higher FEC than females that failed to reproduce. Structural equation modelling revealed future reproductive costs: a positive effect of reproduction on spring FEC and a negative effect on summer body weight were negatively associated with overwinter survival. Overall, we provide evidence that parasite resistance and body weight are important mediators of survival costs of reproduction

The benzimidazole anthelmintic agents - a review

Peer reviewe