I make short, to-the-point online math tutorials. I struggled with math growing up and have been able to use those experiences to help students improve in math through practical applications and tips.

(See notice at the end of this document regarding copyright.) This site is for those who know nothing of R, and maybe even nothing of programming, and seek QUICK, PAINLESS! entree to the world of R.

Study objective: This didactical essay is directed to readers disposed to approach multilevel regression analysis (MLRA) in a more conceptual than mathematical way. However, it specifically develops ...

One of the most famous performance models used in HPC is the Roofline model. During courses I was asked often how to derive empirical Roofline models with LIKWID. An empirical Roofline model presents ...

Get started with Java streams, including how to create streams from Java collections, the mechanics of a stream pipeline, examples of functional programming with Java streams, and more. You can think ...

Abstract: This paper investigates a GraphRAG framework that integrates knowledge graphs into the Retrieval-Augmented Generation (RAG) architecture to enhance networking applications. While RAG has ...

Community driven content discussing all aspects of software development from DevOps to design patterns. The speed and efficiency of traditionally developed software applications is limited by the fact ...

This trick is a classic of magic - passing a coin through the table. It is the perfect trick to do in the pub or bar since you will always have a coin, a napkin and a glass at your disposal. Practice ...

Placing spreadsheet data into a table quickly formats it and makes it easy to work with and analyze. Here’s how to use this basic yet powerful Excel tool. Tables are one of the fundamental tools in ...

Ergo Sum is an Exotic sword in Destiny 2, added in The Final Shape expansion. This is not only the sword you saw on your grave back in the Corridors of Time — giving it some major lore significance — ...

If you want to know how to use VLOOKUP to sum multiple rows in Excel, we’ve got you covered. VLOOKUP’s syntax only returns the first value in a column. However, if you have data where values are ...