We propose a novel call admission control which makes use of ratio-based traffic measurement to estimate the required bandwidth when a new call is issued. Existing approaches fail to estimate properly the required bandwidth. To alleviate the problem, we calculate the ratio between the measured mean rate and the mean rate declared by UPC parameters. The ratio and the target cell loss rate are used to estimate the required bandwidth to make decision if a new call is accepted or rejected. Because of more accurate estimation of required bandwidth, our method can provide a better control on quality of service.

The current dissertation is a replication of a pilot study and aims to define what it means for group leaders to "act on" feedback from a group therapy process measure called the Group Questionnaire (GQ). Twelve leaders received feedback reports based on group member responses to the GQ after each session. Leaders submitted two sources of qualitative data: brief written session-by-session explanations of feedback use and end-of-semester debrief interviews to describe their experience with the measure. Researchers conducted a qualitative content analysis that yielded 15 categories of leader GQ use summarized by three temporal dimensions. Quantitative analyses were performed to test for variability in leader use. Categories common to both the pilot study and the current study were established, and the two data sets were merged to create one complete data set. A brief questionnaire designed to summarize leader use is introduced, and quantitative analyses were performed to test the relationship between this measure and qualitative findings. Finally, implications of these findings are discussed.