Two multivehicle routing problems are considered in the framework that a visit to a location must take place during a specific time window in order to be counted and all time windows are the same length. In the first problem, the goal is to visit as many locations as possible using a fixed number of vehicles. In the second, the goal is to visit all locations using the smallest number of vehicle...

OBJECTIVE To evaluate whether delivering acne follow-up care via an asynchronous, remote online visit (e-visit) platform produces equivalent clinical outcomes to office care. DESIGN A prospective, randomized controlled study. SETTING Two teaching hospitals in Boston between September 2005 and May 2007. PARTICIPANTS A total of 151 patients with mild to moderate facial acne. INTERVENTIONS...

How can the formation of beneficial, lasting habits be promoted? Previous research suggests that persistent habits often involve regular, cue-triggered routines. We conducted a field experiment with 2,508 employees of a Fortune 500 company to test whether incentives for exercise routines—paying participants each time they visit a company gym within a daily two-hour window—lead to more persisten...

PURPOSE/OBJECTIVES To understand the content and temporal structure of survivor-provider communication during breast cancer survivor follow-up visits. DESIGN Descriptive correlational. SETTING Private outpatient oncology practice. SAMPLE 55 breast cancer survivors; 6 oncology providers. METHODS A secondary analysis of audio recordings of survivor follow-up visits. MAIN RESEARCH VARIAB...