Category Archives: YouTube

Portuguese Pronunciation and Language Tips

I’ll be taking a group of 34 MBA students on an international business immersion trip to my native Brazil this Spring. We’ll be visiting about a dozen companies in the cities of São Paulo and Rio de Janeiro. This is an initiative created by the awesome Center for International Business Education and Research (CIBER) at the University of Miami.

I’d like my students to be able to pronounce some of the main sounds in Portuguese correctly because I know Brazilians pay attention and really enjoy when foreigners make an effort to say things properly. Therefore, I created a video in which I go over what I consider to be some of the most important things to know when speaking Portuguese (there are others, but I didn’t want the video to be too long).

You can access it on my YouTube channel here:

Moreover, the 2016 Olympic Games are coming, so I figured these tips could be useful for a larger audience as well. I wish American sports casters would watch this video because they murdered the pronunciation of everything during the World Cup in 2014.

Bonus material: My daughter, Lavinia Lilith, a.k.a. #LLCoolBaby, makes a short appearance at around the halfway mark.


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Filed under Brazil, People, Teaching, Tips and Tricks, Travel, Videos, YouTube

Happy Holidays O.R. Style

The previous owners of our house were kind enough to leave their piano behind. It’s a beautiful old-school player piano. It uses paper rolls to encode the songs like punch cards (we inherited a number of rolls as well). I’ve never taken piano classes, but every now and then I enjoy poking around the keys until I manage to play something simple. Here’s a picture:

After managing to play “We Wish You a Merry Christmas”, I decided to create a happy-holidays video card as a thank you to all my readers (yes, all nine of you). However, having a tendency to think about alternative lyrics to well-known songs, I could not help doing it again. The result is an O.R.-ish version of the song, which I hope you’ll enjoy.


Filed under Holidays, Music, Promoting OR, Videos, YouTube

YouTube Videos on Solving LPs with Excel

This had been in the back burner for a long while. Each time I taught my O.R. class (either undergrad or MBA), I kept thinking that the students would like to be able to see the Excel setup of an LP model over and over again. Many of them are not proficient in Excel, and my class is their first contact with things like absolute cell references and SUMPRODUCT. I watched a number of YouTube videos on the topic, but I wasn’t happy with any of them. Besides, I wanted the video to be about the same example that I use in the classroom. So I decided to bite the bullet and go for it. I think the outcome was decent: not great, but not terrible either. My wife said I sound a little stilted. I agree. I was only willing to do it once, no second takes, which means I was a little nervous :-)

Before I give you the link to the videos, I need to bring your attention to two disclaimers:

Disclaimer 1: I used the demo version of iShowU to record my screen action. That means you’ll see a green watermark on top of the video. I know it’s ugly, but I didn’t want to pay $29.95 for it. At least not until I get some feedback to convince me that I’ll be doing more of these videos.

Disclaimer 2: I shamelessly use the same example that they (used to?) use at the Tepper School in my classes: the “famous” farmer problem (sorry Javier :-). I was the head TA for that class a number of times and I literally sat through it at least 3 or 4 times.

Here they are:

Linear Programming: The Farmer Problem, Part I (9:07 min)

Linear Programming: The Farmer Problem, Part II (8:57 min)

I hope these videos turn out to be useful to my students and to anyone who wants to learn about linear programming and Excel Solver. I’m thinking about doing more videos on the diet problem, transportation, sensitivity analysis, etc. Let’s see how things go.


Filed under Linear Programming, Modeling, Teaching, Videos, YouTube