San Antonio Express (March 18) -- Short walks or jogs to bus stops and train stations may seem like small potatoes in the fight against obesity, but they can add up and make a difference, says U. of I. computer science professor Sheldon H. Jacobson, who has led research on the subject. Late last month, Jacobson published research in the journal Preventive Medicine hypothesizing that reducing daily automobile travel by 1 mile per driver and walking a mile instead would be as effective as reducing caloric intake by 100 calories per day.