It hit me suddenly: exhaustion, a wad of fuzz in my brain, persistent waves of nausea.
During this period persistent waves of migrant Han (Chinese) from the North occupied the land, and the indigenous Miao (Hmong), Tujia, Dong, and Yao (Mien) were pushed west and southwest into the hills, which they still occupy.
President Obama, his troubles piling up in Washington, traveled to Manhattan for a busy evening of fundraising for the Democratic Party, telling audiences that progress was being stymied by a persistent wave of "hyper-partisanship" in the Capitol.
In terms of national policy, a steady, persistent wave of mid-level attacks may well be a relevant threat we need to focus on.
The stably high spatial auto-correlation, even for large lags k, far away from the pinning position suggests that the high and low plateau of the wave are persistent in wave-pinning regimes (Fig. 11 bottom right).
The presence and size of the Osborn wave were inversely related to body temperature, and in three patients persistent Osborn waves were seen after prolonged hypothermia.
Infrasound monitors do the same job for the atmosphere, picking up the inaudible but remarkably persistent sound waves that circle the world when a bomb goes off.
These are quite transient, dissipating rapidly if the wind dies away or developing to the more commonly observed and more persistent gravity waves.
The physical effect of the first time derivative is profound: instead of getting persistent vibrational waves, the heat spreads out more and more smoothly it diffuses.
In what will come as little surprise to Americans suffering through this summer's persistent heat waves, Ms. Cullen notes that the average annual temperature in the United States "has risen more than two degrees F during the past 50 years, and the temperature will continue to rise, depending on the amount of heat-trapping gases we emit globally".
Some speakers may also talk about the challenges of higher education, the dangers lurking in the world, or about the prospect of living in changing climates that promise ongoing droughts, persistent heat waves, stronger blizzards, powerful tornadoes and destructive hurricanes.
