The Thidé Book of EMT

An entire book on electromagnetic theory, free to download! That was my reaction when I found exactly that. It comes from a physicist who works at Uppsala University. A physicist named Bo Thidé, and the book, of course, is called "Electromagnetic Field Theory".

Electromagnetic Field Theory by Bo Thidé

I found this book out of necessity - I needed to look-up some EMT. It's the course book for a Classical Electrodynamics course at Uppsala University, so at least it has that reliability. It has also been recommended by Gerard t'Hooft, on the page that landed here.  To say a piece about the content, it's nice and concise, with a large mathematical formula section at the end. It's level is late-undergraduate and postgraduate - so Bones and Jaw. There's also an exercise book that can be found on the same website. It used to be available on Amazon, but it came with a cover designed by Albert Hofmann (well it looks like it was).

A garish existence on Amazon.

Before I found this book I didn't know about the Swedish city, Uppsala. Turns out it's the fourth largest city in Sweden, has some pretty impressive buildings and is home to the oldest Swedish university... yep, Uppsala University. This particular university once had it's doorways darkened by Anders Celsius, inventor of the Celsius scale. It's clear that Uppsala is a great city for it's own reasons, but for me, Bo Thidé has put Uppsala on the map.

I like this book!
Tack, Bo Thidé.

Links:

Download page for Electromagnetic Field Theory by Bo Thidé:
http://www.plasma.uu.se/CED/Book/index.html#download

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The Astronomy Virtualisation

It's difficult to not feel like dreamers when looking up at the night sky. Unless you're kicking it in the big smoke ... or anywhere that has a street light. That's because of light pollution. But you can freely defeat light pollution with a laptop, smartphone or tablet. I'm not talking about hacking the government, I'm talking of virtual astronomy. Below are three of the best methods of astronomy virtualisation.

Sky Map

This app's available on Google Play, hence it's for Android. When pointing it at the stars, it can feel a little bit "shaky", but it's got all the basic astronomy kicks to get you spinning. If you can see the stars in real life, Sky Map is a good way to check out what you're looking at, then you can say to someone: "Your eyes are brighter than Sirius... it's that one there", or something rubbish like that.

Sky Map.

Stellarium

This one's free for Mac, Windows and Linux and can be downloaded from the Stellarium website. Some planetariums actually use this program. It's really nice to be able to see what the universe looks like from another planet's perspective. But the best bit is going in spaceship mode and take yourself to the Moon and back.

Mars as the Mars Rover sees it, according to Stellarium.

Planetarium

This post is being written on a Chromebook, a machine which won't run either Sky Map or Stellarium. So as an alternative, you can use the Planetarium website. You may expect to have to log-in to the website, but you don't, you just load the page. It's also available as a Google Chrome extension. Planetarium is like Sky Map - straight up and simple.

Screenshot of the Planetarium website (set at a random date).

Of Interest:

Horrendous astronomy pick-up lines (where the "brighter than Sirius" one was found):
http://tehcip.wordpress.com/2013/01/17/astronomy-pick-up-lines/

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The Pasture of C++ Notes

A while ago I needed to learn a programming language. But which one? There's a lot to choose from. Baffled and confused, I took a piece of advice from a computer scientist friend: "C++, because once you learn that, all other languages will follow". Nice and simple, now to learn it.

A lot of graduate students will start their studies without knowing a great deal of programming languages. This means that when they start, they need to learn it. So most places put on computing lectures for these students as soon as they start and, most of the time, they put it on the internet.

The following resource is, as it says, from the DESY Summer School. The notes you can get are a pdf of the slides/handouts that were used in the lectures. As always, lecture notes are quick to the point and they won't go unnecessarily out of the way. For example, the language FORTRAN is described as VW Beetle, whereas C++ is described as a Formula 1. Nice and snappy, but I think a more amusing comparison would be a plain to one of those ribbed things... Regardless, here it is:

https://www.desy.de/~blist/summerstudents/c++-intro-10-offhandout.pdf

A drawback of the notes is that they may not go into enough detail. That's why you can use another resource along side it. The cplusplus website has a really good tutorial that you can also download as a pdf:

http://www.cplusplus.com/doc/tutorial/

To actually do the code you need a compiler. So I followed more advise from the computer scientist friend: "use Linux because it just works" - Ubuntu and g++! If you aren't a fan of the above two resources, try these out too: C++ Intro and C++ Reference.

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The YouTube VT Round

Sometimes I cringe when I think about all the time that I’ve wasted on YouTube watching the sneezing panda video. But, YouTube has a lot of physics videos too. The only problem is, it also has a lot of crap physics videos. With a little bit of exploring, you can uncover the really good ones. Here’s some of the best ones that you can watch in less than 5 minutes.

MinutePhysics

By searching physics, the MinutePhysics channel actually does have a high chance of coming in the top 10 results. It’s not surprising really, as it’s easily the best channel that explicitly states physics in the name. The videos are just a hand drawing simplistic cartoon pictures, whilst a voice narrates you through. A nice aspect of this style is that the voice feels right, in a way that a voice like Extreme Makeover host, Ty Pennington, simply wouldn’t. Neil Turok has done the voice on at least one of the videos (he’s the director of the Perimeter Institute). Without going into heavy descriptions, MinutePhysics is able to explain some hardcore topics. Take parallel universes for example:

Smarter Every Day

The Alabama man behind SED is called Destin. His mantra is “I try to get Smarter Every Day, and make fun science videos sharing my progress”. He spends a lot of time on his videos, and you can really tell. His friends and family once had intervention with the theme “Bro’s before YouTube”. I know this because he recorded it, and put it on YouTube. Regardless of the intervention, there’s some diamond VT on his channel, this was the first one that I ever watched:

Others

Often I've come across some VT that's looked ridgy didge, but has gone straight onto the junk pile. In particular, the 100 second videos by Physics World - so so boring. Here's some other good videos of interest: Veritasium, Fermilab and, if you feel brave enough for the Glasgow accent, Glesga Physics. 

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The Perimeter Institute Video Inclusion

The Perimeter Institute is the Black Pearl on the theoretical physics ocean. Among its’ crew are some of the leading researchers in particle physics, string theory, cosmology, condensed matter and quantum physics. So, when the Perimeter Institute do lectures or seminars, you expect them to be pretty good ones. Amazingly, you can make this decision for yourself as you can access every single recorded lecture and seminar from their website for free. And they record everything!

The PIRSA website is where the action happens. PIRSA stands for “Perimeter Institute Recorded Seminar Archive” - which is rather self explanatory. On this website, you can browse through the entire archive of videos. Some of these videos are public outreach, some are colloquium, but the majority are from their masters courses in theoretical physics. So it's applicable to all levels. Splice the mainbrace! (Apparently that mean to give the crew a drink.)

The masters course is really intense, but you’re able to just stroll through the lectures in your own leisurely time. There are 4 parts to the course:

1. "Mathematical Review" - reviewing mathematics such as group theory and complex analysis. A man who goes by the name of Tibra Ali does the complex analysis course and he does a really good job of it.

1. "Core" - essential physics that’s needed for understanding heavier topics, such as string theory.

1. "Review" - this is pretty much a review of the areas of research at Perimeter. This is where you get to see courses on string theory and cosmology and all the others.

1. "Explorations" - again, this is to do with the areas of research at Perimeter, but the focus is now on current research.

Here’s the lecture list from the 2011/2012 academic year. Although they go on every year, I found the 11/12 ones the best - the most recently completed.

The non-course videos are also really good. One of my favourites is by Cliff Burgess, a particle physics researcher who, on his homepage, describes himself as "one helluva guy", and he is! In this VT, he essentially “gases” about why particle physics is the best research area.

The main piece of advice from the above VT is to, when it comes to physics, "follow your nose". Sniff. Sniff.

PIRSA website:

http://pirsa.org/

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