Fox News Flash top headlines are here. Check out what's clicking on Foxnews.com. NEW YORK (AP) -- The NFL had 77 positive COVID-19 tests from 11 teams re-examined by a New Jersey lab after false positives, and all those tests came back negative. The league asked the New Jersey lab BioReference to investigate the results, and those 77 tests are being re-tested once more to make sure they were false positives. Among teams reporting false positives, the Minnesota Vikings said they had 12, the New York Jets 10 and the Chicago Bears nine.

In this paper, we present an optimized version of the previously developed Block Modularity algorithm (Anthony,2009). The original algorithm was a fast, greedy method that effectively discovered a structured clustering in linked data and scaled very well with the number of nodes and edges. The optimized version is scalable in terms of the model complexity; the technique can now be used effectively to discover thousands of clusters in data sets with hundreds of thousands (and possibly more) nodes and edges. The optimization leads to an improvement of the runtime per iteration from cubic to quadratic with a small increase in the constant factor. The algorithm compares favorably with Karrer and Newman's Degree-Corrected Block Model (DCBM) in both runtime and quality of results.