Active probing has increasingly been used to collect information about the topological and functional characteristics of the Internet. Given the need for active probing and the lack of a widely accepted mechanism to minimize the overhead of such probes, the traffic and processing overhead introduced on the routers are believed to become an important issue for network operators. In this paper, w...

We are developing a robotic measurement facility which makes it very easy to build “reality-based” models, i.e., computational models of existing, physical objects based on actual measurements. These include not only models of shape, but also reflectance, contact forces, and sound. Such realistic models are crucial in many applications, including telerobotics, virtual reality, computer-assisted...

The value of research in any topic area turns on its validity. Patient safety research has revealed--or, at least, given renewed urgency to--a raft of methodological issues. The meaning and thus the value of empirical research in this field is contingent on getting the methodology right. The need for good methods for the measurement of error is necessary whenever an inference is intended and, s...

Hackystat, an automated metric collection and analysis tool, adopts the “Most Active File” measurement in five-minute time chunks to represent the developers’ effort. This measurement is validated internally in this report. The results show that big time chunk sizes are highly linear regressive with the standard time chunk size (1 minute). The percentage of missed effort to total effort is very...

Despite growing link capacities, over-dimensioned buffers are still causing, in the Internet of the second decade of the third millennium, hosts to suffer from severe queuing delays (or bufferbloat). While maximum bufferbloat possibly exceeds few seconds, it is far less clear how often this maximum is hit in practice. This paper reports on our ongoing work to build a spatial and temporal map of...