T2* decay is of much greater magnitude than T2 in tissues and results in more rapid signal loss as compared to the T2 relaxation.If one had a perfectly uniform magnet and an object without susceptibility effects, the T2 and T2* would be equal.he relationship between T2 and T2* can be illustrated by the multiecho spin echo sequence shown in Figure 2. The 180 degree RF pulses used to generate the echo are rephasing the spins that have undergone T2* decay. The gradual decline in signal from subsequent echos reflects T2 decay.
At 15 kWh, trading in a pre-1986 fridge for a new efficient one would save about $158 a year in electricity costs. And some older fridges are even worse than the average. One reader estimates her savings to be $238 per year for trading in her 1979 fridge for a 2004 model.ridge should be 36-40F, and the freezer should be 0-5F (-17 to -10C). Fridges set 10 degrees lower than needed (or freezers set 5 degrees lower than needed) can increase energy use by as much as 20-25%. Personally, I set my own fridge to 56 because as a vegan I never store super-perishables like meat or dairy.
Here is an example of our usage, for the 12 months between 27th May 2008 and 27th May 2009: 8,587 kWh Peak usage. 4,441 kWh Off Peak Usage. This is a total of 13,028 kWhs per year, (35.7 kWh per day) compared to the Australian national average Electricity consumption of 6,570 kWhs per year (18 kWh per day).