Welcome to prokopyshen.com

I am an independent Information Technology consultant providing design, build, engineering and programming services.  I have extensive experience in the design and operation of LAMP-stack web hosting, DNS administration, SSL certificates and internet application hosting for small, medium and enterprise clients.  One of my key services is troubleshooting performance issues starting with MySQL slow query analysis and reviewing all aspects of the LAMP stack including optimal use of Content Delivery Networks like Amazon Web Services (AWS) Cloudfront service.  If you are hosting at AWS, or running a private cloud using XEN, or just need some assistance with linux/Solaris/network system administration please Contact Me.
I can also provide tutoring, troubleshooting, code walk throughs, consulting and programming service for your automated trading algorithm to run either in Quantopian's python web trading system or for validation work using Quantopian's Research Environment or their offline open source zipline back tester facility.  Contact Me with your quantatitive finance requirements.
If your business - especially startups - is located in Michigan's Oakland County Automation Alley , please send me a mail for networking purposes so we can get to know each other.
In my blog I write about my experiences with Arduino, classic stereo equipment , quantitative finance and the web hosting business of Daily Fantasy Sports .
For more information on services or availability please  Contact Me .

Round1 Unlimited Time Play : Good Deal or Not?

Round1_Credit_ChargesRound1 Bowling and Amusement is a fun place with lots of ways to spend some time… and your money!


During a recent visit, I wondered when does it make sense for an arcade/game player to play using “Unlimited Time Play” versus playing by game credits.  There is a lot of factors to consider here, but here is my perspective.


This calculation is based on charges I saw posted on October 27, 2017 at the Round1 nearest me.  Your location may have different rates.  But I will show you how do this step by step so you can determine this for your situation.


Click to Read More

Review : Stanford University Andrew Ng’s Machine Learning course at Coursera

I found this online course to be interesting, challenging, practical and it gave me some fresh ideas about problem solving using numerical methods.

What I liked most:

1) The lecture videos directly tied into the programming exercises.  You had a chance to directly try out what you just learned by programming it.

2) The automatic scoring/review of your programming assignments with the submit script was a great way to get instant feedback.

3) I was never bored listening to Andrew talk.  He worked very hard in making this material.

markit Excel plugin and slow spreadsheet loading recalculations

IHS Markit is one of the premium data providers for quants around the globe.  One of the mechanism that this data can be accessed is via an Excel plug-in.

An interesting problem can arise with any asynchronous plug-in (not just Markit) that can lead to Excel spreadsheets not loading correctly or recalcuations that never complete.  Let's explore the situation that I encountered !



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