On a regular spring time a lot of tulip flower fields outside the Keukenhof are headed (taking the flower off) on the 30th of April or within a couple of days after it. If you want to see the flower fields as well make sure that you visit before this date!
In factorial designs, a factor is a major independent variable. In this example we have two factors: time in instruction and setting. A level is a subdivision of a factor. In this example, time in instruction has two levels and setting has two levels. Sometimes we depict a factorial design with a numbering notation.
If a product competing with WSP does not have a code-defined research report* establishing its R factor as 6.5, it must use the code-assigned value for all other materials. A product with an R factor of 2 must be designed for 3.25 times the seismic load that a WSP shear wall is designed to resist. It is clearly important to CMs that, as new sheathing products come into the market, there is a rational engineering basis for evaluating their SDCs.