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{ Category Archives } STEM

Gravity waves. 5 Sigma results

The announcement indicates that gravity waves have been detected. The source of the waves is the collision of two black holes each with a mass of tens of times that of the sun. In the collision, an amount of mass was lost equivalent to several times that of the sun. This loss of mass was […]

Transtronics Wiki

It was a link to the capacitor codes page that got me started on the TransWiki. A look at the sealed lead acid page indicated that the technical expertise was up there, too. There’s a good range of information on  the Wili from paint primers and solvents to KiCad information. The company sells industrial level […]

Literacy: 17 Equations

Andy Kiersz presents The 17 equations that changed the course of history at Business Insider In 2013, mathematician and science author Ian Stewart published a book on 17 Equations That Changed The World. We recently came across this convenient table on Dr. Paul Coxon’s twitter account by mathematics tutor and blogger Larry Phillips that summarizes […]

Math education

In a discussion between Dave Jones and Jack Ganssle (YouTube) the topic of engineering education came up. This centered on the requirements for calculus despite neither of these experienced electronics engineers recalling having ever used integrals or differentials in their careers. The issue is one of training versus education. Engineering curriculum in colleges is particularly […]

Cheap computers for the hobbyist to make anything smart and connected

It looks like the Kickstarter project for a $9 computer is getting a lot of publicity and a lot of subscribers.(See C.H.I.P. Is a Tiny, Incredibly Powerful Mini $9 PC That Runs Linux at Softpedia). The plan is to take a System on a Chip (SoC) designed for cheap tablets and put it out in […]

But it doesn’t tell a story

I always considered mathematics education to be much like calesthenics in athletics. The goal isn’t so much the technique of the exercise as it is in preparing for a proper outcome. In athletics, it is to improve the odds of winning with less injury. In education, mathematics is about honing the mind for more productive […]

Air conditioning, humidity, condensate and Summertime

Having to use the shop vac to get a few gallons of water out of the ductwork on a regular basis was an indication of a problem. Where does it come from? I used Calculate Temperature, Dewpoint, or Relative Humidity to see how humidity changes with temperature. 90F at 10% humidity is a 26F dew […]

What makes physiscists wierd?

Besides spherical cows (I prefer the spherical chicken), physicists tend to stand out as wierd in how they approach problems. Chad Orzel has a post on Think like a physicist that delves into the matter. ” the various scientific fields have a lot in common, and a generally reductive approach is one of those things. […]

25 years on: Wolfram tells the Mathematica story

Symbolic math is a bit more than just parsing an algebraic equation. Mathematica has become a standard for scientists trying to figure out better ways of expressing mathematical concepts and understanding what they mean. “Electronic calculators arrived on the scene when I was 12—and I immediately became an enthusiast. And around the same time, I started […]

On the nature of physics

Luboš Motl says Learning physics is futile without practicing but it’s not practice he is talking about. “Physicists have the working knowledge of all the things in the Universe – OK, I mean all the important things in the Universe – but they only have it if they can actually think. … they have mastered […]