Suppose that the five measured samplertt values (see section 3.5.3) are 106 ms, 120 ms, 140 ms, 90 ms, and 115 ms. compute the estimatedrtt after each of these samplertt values is obtained, using a value of alpha= 0.125 and assuming that the value of estimatedrtt was 100 ms just before the first of these five samples were obtained. compute also the devrtt after each sample is obtained, assuming a value of beta= 0.25 and assuming the value of devrtt was 5 ms just before the first of these five samples was obtained. compute the tcp timeoutinterval after each of these samples is obtained.

Ashielded metal arc-welding operation is accomplished in a work cell by a fitter and a welder. the fitter takes 5.5 min to load components into the welding fixture at the beginning of the work cycle, and 1.5 min to unload the completed weldment at the end of the cycle. the total ength of the weld seams 1200 mm, and the travel speed used by the welder averages 300 mm/min. every 600 mm of seam length, the welding stick must be changed, which takes 0.8 min. while the fitter is working, the welder is idle (resting): and while the welder is working the fitter is idle. (a) determine the average arc-on time as a fraction of the work cycle time. (b) how much improvement in arc-on time would result if the welder used flux-cored arc welding (manually operated), given that the spool of weld wire must be changed every 10 weldments, and it takes the welder 5.0 min to accomplish the change? (c) what are the production rates for these two cases (weldments completed per hour)? attach your work and solutions.