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Quantitative description and complexity understanding of software architecture are difficult questions of software development. Taking The complexity evolution of VTK software version as an example, this paper proposes a model for predicting the complexity of software evolution based on logistic equation and quantitative validation of Lehman's law. Its basic idea is that the software architecture...
Generating synthetic network graphs that capture key topological and electrical characteristics of real-world electric power systems is important in aiding widespread and accurate analysis of these systems. Classical statistical models of graphs, such as small-world networks or Erdős-Renyi graphs, are unable to generate synthetic graphs that accurately represent the topology of real electric power...
Recently, Software Defined Networking (SDN) has gained a lot of attention, even for the use in core communication networks. When deploying SDN in large core networks, the number and location of controllers must be carefully planned. A first study on this topic by Heller et al. [3] was followed by more detailed publications that included resilience or dynamic controller provisioning. In our previous...
We propose a new technique for visual exploration of streamlines in 3D vector fields. We construct a map from the space of all streamlines to points in {\hbox{\rlap{I}\kern 2.0pt{\hbox{R}}}}^n based on the preservation of the Hausdorff metric in streamline space. The image of a vector field under this map is a set of 2-manifolds in {\hbox{\rlap{I}\kern 2.0pt{\hbox{R}}}}^n with characteristic geometry...
This video presents a practical navigation scheme for indoor mobile robots using hybrid maps. The method makes use of metric maps for local navigation and a topological map for global path planning. Metric maps are generated as occupancy grids by a laser range finder to represent local information about partial areas. The global topological map is used to indicate the connectivity of the `places-of-interests'...
Snapshot is usually applied in p2p network topology analysis. In this paper, we develop the topology crawler software to probe the PPLive application. Based on the measured trace, we characterize the PPLive topology with metrics including degree distribution, clustering coefficient, network diameter, characteristic path length, connectivity matrix and reciprocity coefficient. In additional, we also...
In this paper, we just study churn in Gnutella network, and there are two points that we pay more attention to. Firstly we visualize that the connection changes are much bigger than the degree changes in the Gnutella network; secondly we calculate how many new peers a particular peer can choose as neighbors during a period of time, and the conclusion is that during an hour there are about 26 new peers...
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