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In order to process very large graphs, existing graph processing systems, such as Pregel and Giraph, usually partition and distribute the graph computation on large number of nodes (i.e., workers). However, due to the heterogeneity of computing clusters (e.g., nodes with various bandwidth or CPU resource), blindly increasing the number of workers for a job may even degrade the overall performance...
Nowadays, more and more enterprises and organizations are hosting their data into the cloud, in order to reduce the IT maintenance cost and enhance the data reliability. However, facing the numerous cloud vendors as well as their heterogenous pricing policies, customers may well be perplexed with which cloud(s) are suitable for storing their data and what hosting strategy is cheaper.The general status...
This paper presents a frequency-shaping (FS) neural recorder with automatic bandwidth adjustment. The proposed recorder inherently attenuates electrode offset and motion artifacts, compresses neural data dynamic range by 4.5-bit, and achieves a 3 pF input impedance to better support chronic recording experiments. A major drawback of an FS recorder is larger input referred noise due to noise aliasing...
The heterogeneous nature of Peer-to-Peer (P2P) networks can be exploited to optimize a wide range of applications. But this requires an accurate characterization of peer heterogeneity, which is difficult due to huge population and disparate properties of individuals. To overcome this barrier, we conduct a thorough inspection of peer heterogeneity in terms of individual churn and resource capacity...
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