“As rolling resistance is indicative of the behaviour of a vehicle over specific terrain, it can be viewed as an objective parameter to compare the relative performance of these two wheel sizes,” believes Steyn. So says a team of researchers in the led by John Mason of Tulane University in the US.
The researchers used coast-down tests to evaluate the rolling resistance of four mountain bikes as affected by wheel diameter and terrain type, cyclist mass, tyre inflation pressure and suspension type. Also, sand surfacing has the highest rolling resistance coefficient. David Sanders of the School of Public Health at the University of the Western Cape is one of the co-authors.
I was in luck as I saw a white dress in the distance and quickly walked over to where all the wedding photographic activities were taking place.
Weddings are difficult to photograph, especially outside in full sun, as the combination of white dress & dark suit makes it difficult to capture detail & contrast in the highlight and the shadow areas.
This would be a good test to see if one can still hold the details in the all important white wedding gown, especially if the image was overexposed. The results was that the wedding dress was totally overexposed with no detail in the cloth.
The photograph was taken in full sunlight without flash.
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