Sistema di guida robot per operazioni di pick and place

Uno dei fattori che ha favorito la diffusione della robotica è legato alla nascita, allo sviluppo e al perfezionamento dei sistemi di guida robot. Per guida robot si intende un sistema di visione artificiale capace di guidare un robot durante lo svolgimento di un determinato compito. All'interno di questo elaborato di tesi, verrà illustrato in dettaglio un sistema di guida robot realizzato per una operazione di pick and place 2D multistrato. Sebbene la procedura proposta sia stata sviluppata per risolvere un problema specifico, la sua validità è del tutto generale e può essere estesa anche ad altre applicazioni appartenenti alla stessa categoria.

Acute stress regulates vasotocinergic and isotocinergic systems in the gilthead sea bream (Sparus aurata L.).

The hypothalamus-pituitary-interrenal axis is involved in stress response regulation. In addition, arginine vasotocin (AVT) and isotocin (IT) are also considered as important players in this stress regulation. The present study assessed, using the teleost gilthead sea bream (Sparus aurata) as a biological model, hypothalamic mRNA expression changes of AVT and IT and their receptors at hepatic level after an acute stress situation. Specimens were submitted to air for 3 min and place back in their respective tanks after that, being sampled at different times (15 min, 30 min, 1, 2, 4 and 8 hours post-stress) in order to study the time course response. Plasma cortisol values increased after few minutes post-exposure, decreasing during the experimental time while a metabolic reorganization occurred in both plasmatic and hepatic levels. At hypothalamic level, acute stress affects mRNA expression of AVT and IT precursors, as well as hepatic expression of their receptors, suggesting the involvement of both vasotocinergic and isotocinergic systems in the acute stress response. Our results demonstrate the activation and involvement of both endocrine pathways in the regulation of metabolic and stress systems of Sparus aurata, which is stated, at least, through changes in mRNA expression levels of these genes analysed.