By Wendy A. Suzuki – Let’s start with one of the most practical immediate benefits of breaking a sweat: exercise combats stress.
Exercise is a powerful way to combat feelings of stress because it causes immediate increases in levels of key neurotransmitters, including serotonin, noradrenalin, dopamine and endorphins, that are often depleted by anxiety and depression. That’s why going for a run or spending 30 minutes on the elliptical can boost our moods immediately—combatting the negative feelings we often associate with chronic stressors we deal with every day.
In my lab, we have also demonstrated that exercise improves our ability to shift and focus attention. more> http://goo.gl/dVvEMG
By George Musser – If a rhinoceros is also able to hurt me, it must be close, too. And if both a lion and a rhino are able to hurt me, then the lion and rhino should also be able to hurt each other. (Indeed, my survival depends on it.)
From this patterning of influences, we extract space. If the threat posed by predators couldn’t be expressed in terms of spatial distance, space would cease to be meaningful.
A less morbid example is triangulation. The signal bars on your mobile phone indicate the strength of the phone’s connection to a cell tower and therefore your distance from that tower. In an emergency, the phone company can locate your phone by measuring your signal at several towers and using triangulation or the related technique of trilateration.
The fact that the measurements converge on a single location is what it means for you to have a location.
The nice thing about defining space in terms of structure is that it sidesteps some of the long-running disputes over the nature of space. more> http://goo.gl/3IYOPD
By Karen Brettell and Timothy Aeppel – Share repurchases are part of what economists describe as the increasing “financialization” of the U.S. corporate sector, whereby investment in financial instruments increasingly crowds out other types of investment.
The phenomenon is the result of several converging forces: pressure from activist shareholders; executive compensation programs that tie pay to per-share earnings and share prices that buybacks can boost; increased global competition; and fear of making long-term bets on products and services that may not pay off.
It now pervades the thinking in the executive suites of some of the most legendary U.S. innovators. more> http://goo.gl/8ZIgb0
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