Word: counteractions
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...sagging under its own weight and distorting the curve, the mirror had to be a bulky 26 in. thick, and it weighed 20 tons. That enormous heft called for an even more massive support structure to hold the whole thing up while at the same time adjusting constantly to counteract the effect of Earth's rotation. Scaling the design up any further would have been absurdly expensive...
...Europe, design teams came up with yet another idea, the exact opposite of Angel's: instead of making the mirror hollow to save weight, let it be thin--about 8 in. thick for an 8-m mirror, in contrast to the 5-m Hale's 26 in.--and counteract the resulting floppiness with computer-controlled supports that continually readjust its shape...
...years, doctors have warned passengers who travel long distances not to stay seated for the entire flight. A known risk factor for blood clots in the leg is remaining sedentary for long periods of time--three hours or more. One of the easiest ways to counteract this risk on an airplane is to get up occasionally for a couple of minutes and walk the length of the plane. If the flight attendants are in the middle of service, just stand next to your seat and do a series of toe raises--lift yourself up on your toes for a couple...
There was one surprise from the North American study. Contrary to expectations, children on inhaled steroids did not fare better than the control group in tests that measure lung capacity. Researchers speculate that there was already some permanent damage that the steroids could not counteract, as study subjects had been found to have asthma an average of five years before they started treatment. Some experts believe that for optimal results, steroid therapy should begin within two or three years of the initial symptoms. If that's the case, doctors may need to give inhaled steroids to children as young...
...Texas, public universities have managed to counteract the effect of racial-preference bans by automatically admitting the top 10% of the graduating class of every high school, including those schools where most students are minorities. But Rice University in Houston, private and highly selective, has had to reinvent its admissions strategies to maintain the school's minority enrollment. Each February, 80 to 90 black, Hispanic and Native American kids visit Rice on an expenses-paid trip. Rice urges counselors from high schools with large minority populations to nominate qualified students. And in the fall, Rice sends two recruiters...