Diagnosis of valvular heart disease using transcutaneous Doppler ultrasound

Existing activity-based models are typically concerned with predicting observed activity travel patterns. The study of the dynamics of the activity-scheduling process has received far less attention. To some extent, this situation can be explained by a lack of relevant data, but there is also a lack of conceptualization and simulation work. To fill this gap, the process of how individuals adjust their activity program as a function of anticipated time pressure during the execution of the program is conceptualized and specified.