This study was designed to determine the possible protective effect of polysaccharides extract of rhizoma atractylodis macrocephalae on heart function in aged rats. Polysaccharides extract of rhizoma atractylodis macrocephalae was administered to aged rats. Results showed that thymus, spleen and cardiac indexs were significantly increased, whereas caspase-3 activity ratio, Smac/DIABLO and HtrA2/Omi protein expression, Smac/DIABLO and HtrA2/Omi mRNA expression levels were markedly reduced. It can be concluded that polysaccharides extract of rhizoma atractylodis macrocephalae may enhance immunity and improve heart function in aged rats.

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This study aimed to examine how workload and automation aid type affected operators’ trust in automation, attention allocation and dual-task performance. With a simulated surveillance task, participants monitored the picture steaming from an unmanned ground vehicle (UGV) while planning the paths of two unmanned aerial vehicles (UAVs). The analysis of experimental results indicated that workload affected operators’ attention allocation and dual-task performance, but not their trust in automation. As workload increased, attention allocation on the automated task decreased and on the concurrent task increased. Moreover, an increasing workload led to longer response time for the automated task. For the concurrent task, higher workload harmed task performance accuracy but resulting in shorter response time.

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