independence of observations is a fundamental assumption in designing an x chart for individual observations. but unfortunately, the assumption of existence of independent data is not even approximately satisfied. in fact, there is one kind of autocorrelation in the data. this paper demonstrates, through simulating an ar(1) process, that the autocorrelation in the data has deep effect on x char...

From the relations between critical illumination in a flash (I(m)) and the flash frequency (F) for response of the sunfish to visual flicker when the proportion of light time to dark time (t(L)/t(D)) in a flicker cycle is varied at one temperature (21.5 degrees ) the following results are obtained: At values of t(L)/t(D) between 1/9 and 9/1 the F - log I(m) curves are progressively shifted towa...

This paper presents a characterization of the wave power resource and an analysis of the wave power output for three (AquaBuoy, Pelamis and Wave Dragon) different wave energy converters (WEC) over the Brazilian offshore. To do so it used a 35 years reanalysis database from the ERA-Interim project. Annual and seasonal statistical analyzes of significant height and energy period were performed, a...