In order to eliminate the influence of the joint torsional vibration on the system operation accuracy, the parameter identification and the elastic torsional vibration control of a flexible-joint robot are studied.Firstly, the flexible-joint robot system is equivalent to a rotor dynamic system, in which the mass block and the torsion spring are use
In this in vitro study, the influence of the concentration of abrasive particles on the abrasivity of toothpastes was investigated using laser scan profilometry on polymethyl methacrylate (PMMA) surfaces with the aim of providing an alternative method to developers for screening of new toothpaste formulations.PMMA plates were tested in a toothbrush
Top-down synapses are ubiquitous throughout neocortex and play a central role in cognition, yet little is known about their development and specificity.During sensory experience, lower neocortical areas are activated before higher ones, causing top-down synapses to experience a preponderance of post-synaptic Peeler activity preceding pre-synaptic a
BackgroundThe artemisinin derivatives are the preferred antimalaria drugs for treating severe Plasmodium falciparum malaria.However, their clinical effectiveness compared to each other is unknown.Our objective, therefore, was to evaluate the efficacy and safety of the artemisinin derivatives and quinine for treating severe P.falciparum malaria in c