Virtual channel (VC) flow control proves to be an alternative way to promote network performance, but uniform VC allocation in the network may be at the cost of chip area and power consumption. We propose a novel VC number allocation algorithm customizing the VCs in network based on the characteristic of the target application. Given the characteristic of target application and total VC number budget, the block probability for each port of nodes in the network can be obtained with an analytical model. Then VCs are added to the port with the highest block probability one by one. The simulation results indicate that the proposed algorithm reduces buffer consumption by 14.58%~51.04% under diverse traffic patterns and VC depth, while keeping similar network performance.
-Current studies on tablets and digital pens mainly focus on the modalities of input in the field of HCI (human computer interaction). However, the effect of the changes of environmental parameters on pen-based input operation, such as tilt angle of tablet, has rarely been studied. This paper mainly investigates 1) how pen-based input operation is affected while changing tilt angle of tablet 2) at which tilt angle of tablet, can user do pen-based input operation with comfort, quickness, and accuracy. The conclusions can be got based on the results from the experiments and questionnaire. In order to compare penbased input operation among different tilt angle of tablet (0, 15, 30, 45 and 60 degrees), two experiments of 1-dimensional and 2-dimensional pointing tasks based on Fitts' law were conducted. Results show that when tilt angle of tablet is 30 degrees, it is most suitable for user to do pen-based input operation.Index Terms -HCI, tilt angle of tablet, pen-based input operation, Fitts' law.
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