The added lateral stiffness may shift the periods of the relevant modes of vibration of the structure to a region of the response spectra where the seismic demands are higher.
As depicted in Figure 3b, shifting the period time allows linear tuning of the reflectance band at a rate of 2.4 nm s−1.
Such an object filters the ground motion and shifts the natural period of the structure out of the range of dominant earthquake energy, increasing damping and limiting the force transfer.
At low R0, delaying closures shifts the closure period further toward the epidemic peak.
This, coupled with a shifting of the period to an indeterminate time, created some opening confusion.
Like most cultural shifts, the period of flawed systems builds gradually and is subtle.
As with the Type I variation of prevalence threshold, these results arise from shifting the school-closure period to later in the epidemic.
In his illuminating catalogue essay on Chinese painting, Hearn describes the causes of a "stylistic shift" during the period, as well as the influence of "dynastic change" on the format of paintings.
I was interested in the shift in the period, in showing Betty's life, where it is and where she fits into the world.
