The immune system can distinguish between normal, healthy cells and unhealthy cells by recognizing a variety of danger cues called danger-associated molecular patterns (DAMPs). Cells may be unhealthy because of infection or because of cellular damage caused by non-infectious agents like sunburn or cancer.he immune system can distinguish between normal, healthy cells and unhealthy cells by recognizing a variety of danger cues called danger-associated molecular patterns (DAMPs). Cells may be unhealthy because of infection or because of cellular damage caused by non-infectious agents like sunburn or cancer.
Time-weighted return. The time-weighted return (TWR) (or true time-weighted rate of return (TWRR)) is a method of calculating investment return. To apply the time-weighted return method, combine the return over sub-periods, by compounding them together, resulting in the overall period return. The rate of return over each different sub-period is weighted according to the duration of the sub-period.
Daylight Savings Time, or DST, in 2016 begins on the second Sunday of March and ends on the first Sunday of November. In March, clocks are moved forward one hour from 2am standard time to 3am DST, and in November, clocks are moved back one hour from 2am DST to 1am standard time.The phrase spring forward, fall back is a helpful reminder of these time changes.n March, clocks are moved forward one hour from 2am standard time to 3am DST, and in November, clocks are moved back one hour from 2am DST to 1am standard time.