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So far bcllc has created 103 blog entries.

Isotonic Regressions in scikit-learn

Isotonic regression is a great tool to keep in your repertoire; it's like weighted least-squares with a monotonicity constraint.  Why is this so useful, you ask?  Take a look at the example relationship below. (You can follow along with the Python code here).       Let's imagine that the true relationship between x and y is characterized piece-wise by a sharp

By |2014-06-08T22:30:37-04:00June 8th, 2014|Consulting, Machine Learning, Programming, Research|1 Comment

Is there tax in the cloud?

Do you contract for IaaS, PaaS, or SaaS services like Amazon Web Services or SalesForce?  Do you provide SaaS services like “cloud-based applications” or “web applications?” What state are you headquartered in?  What states are your servers located in?  What states are your customers in, even if for just a moment? Depending on your answer to the

By |2014-05-19T19:19:17-04:00May 19th, 2014|Cloud, Consulting, Infrastructure, Law|0 Comments

Monitoring AWS VPC tunnels

While many Amazon Web Services resources with "state" have CloudWatch sensors available, AWS VPCs and tunnels unfortunately do not.  If you're ever in need of a solution to monitor and log the status of VPC tunnels back to another data center or office, my gist below will be right up your alley.   It uses

By |2013-10-29T08:42:01-04:00October 29th, 2013|Cloud, Consulting, Infrastructure|9 Comments

Automating Oracle ORION I/O testing

Oracle ORION is a powerful tool for evaluating realistic OLTP and DSS/DW I/O performance.  ORION should be a part of every Oracle professional's toolkit for build QA and performance tuning.  I've previously used it on this blog to show the performance of Amazon's hi1.4lxarge SSD-backed instances and newer hs1.8xlarge instances with 117GB of RAM and 48TB of

By |2013-10-29T07:00:19-04:00October 29th, 2013|Consulting, Programming|0 Comments

AWS EC2 hs1.8xlarge Oracle ORION benchmark results

Benchmarking I/O with Oracle ORION is an important part of planning, baselining, and performance-tuning Oracle environments.  I've previously provided ORION results for the hi1.4xlarge SSD-backed instance class, and based on some recent work, I wanted to provide an update for the newer hs1.8xlarge instance class.  Below you'll find hs1.8xlarge Oracle ORION benchmark results with the following

By |2013-10-28T19:33:07-04:00October 28th, 2013|Cloud, Consulting, Infrastructure, Programming, Research|1 Comment

Is the Tax Code the longest Title?

  Last week, I shared that Dan Katz and I had finally published a draft of our paper, Measuring the Complexity of the Law: The U.S. Code.  We'd previewed this research on Computational Legal Studies years ago.  Since then, we've received great feedback and a number of questions.   The most common question, even among legal professionals,

By |2013-08-19T08:52:29-04:00August 19th, 2013|Law, Programming, Technology|0 Comments

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