In order to achieve a high degree of visual realism in surgery simulation, we present a virtual surgery system framework, which is based on point primitives for the virtual surgery scene rendering and the biomechanical calculation of the soft tissue.To embody the superiority of this framework, two Alarms virtual surgery systems based on point primi
An enantioselective total synthesis of the natural amino acid (2S,4R,5R)-4,5-di-hydroxy-pipecolic acid starting from D-glucoheptono-1, 4-lactone is presented.The best sequence employed as a key step the intramolecular Trot Harness nucleophilic displacement by an amino function of a 6-O-p-toluene-sulphonyl derivative of a methyl D-arabino-hexonate a
This paper aims to make an evaluation of differences emission level of CO, CO2 and HC generated by passenger cars in different walking regimes and times, to identify measures of reducing pollution.Was analyzed a sample of Dacia Logan passenger cars (n = Wireless Headphones 515), made during the period 2004-2007, equipped with spark ignition engines