Midwest Theory Get-Together 2013

I was excited to attend the Midwest Theory Get-Together at Argonne National Lab again this year. There were many interesting talks, and I was glad to get an update from the many diverse fields of nuclear theory.

I was especially excited about the last talk of the second day. Mridula Damodaran from Purdue gave a talk about parallelizing the BUU transport model. I wish her success, as I’ve been using a BUU simulation for awhile and the longer simulation runs take 1-2 days — a bit longer than is convenient.

During the Get-Together, I recorded the titles of all the talks that were given, in case I wanted to reference them later, and in case others did too. This record is attached to this post.

Value of a liberal education

A running current through my mind has been the value of a liberal education. My officemates from China and Vietnam have talked about how they didn’t have hobbies growing up, since their parents strongly encouraged them to study hard, to the exclusion of everything else. This can be very efficient in creating people who are very good at a very narrow skillset. However, when it comes to working as a team or public speaking, they are at a disadvantage to many students from the US. Even worse, if it turns out that they don’t enjoy doing the job that they were trained from a young age to do, then it can be very difficult for them to find their own path.

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Perspective and proper citation

This might sound cheesy, but I find it incredible that we live on a planet that is so very small on the cosmic scale, but so big on a human scale. How insignificant we are, yet how important our actions are on a human scale.

Yuri's Planet, horizon of Earth with lens flare from sun

Earth, as seen from the International Space Station
(Image Credit: ISS Expedition 7 Crew, EOL, NASA)

Also, I found this image while searching for a space picture for my business card (custom-made here). I was looking specifically for images of the Earth seen from space. I honed in on this one and wanted to find out where the original was. As it turned out, many many people had reposted it without citing the source. I eventually used tineye to hunt down all instances of this image on the internet, to bring you the source that the photo is linked to above.

I’m still not sure whether I have permission to use this on a business card. I read their image use guidelines, but I couldn’t figure out whether this would count as “advertising” or not, so I emailed the contact on their advertising guidelines page. I’ll update this page when I hear back from them.

Student epiphany in the physics lab

In Carl Sagan’s book Pale Blue Dot: A Vision of the Human Future in Space (1994), page 159, the renowned astronomer and science popularizer wrote:

It is sometimes said that scientists are unromantic, that their passion to figure out robs the world of beauty and mystery. But is it not stirring to understand how the world actually works—that white light is made of colors, that color is the way we perceive the wavelengths of light, that transparent air reflects light, that in so doing it discriminates among the waves, and that the sky is blue for the same reason that the sunset is red? It does no harm to the romance of the sunset to know a little bit about it.

(as quoted in Today in Science History)

I had that kind of experience in the introductory laboratory I was teaching yesterday. We were using a digital spectrometer to investigate the wavelengths of light that were emitted from various objects like gas discharge tubes and the ceiling lights. The students learned that there was very little red in the ceiling lights, so that’s why red things in the room always look faded, and especially that the red light from the computer monitors looked more vibrant than the light from the paper. One surprised student said to me, “So we can’t even trust our eyes in this experiment?!”

This is the epiphany that I live for in the classroom – that the world we perceive is not always the world as it is, and we can use tools and science to help remove some of our biases.

This, to me, is beautiful.

Workaround for my Ubuntu wireless connectivity problems

About a month ago, I started having problems connecting my Ubuntu 11.10 laptop to MSU’s wireless network. In the morning, when I would connect, it would do so successfully for 10 minutes to an hour. Then it would stop working, and just try to repeatedly connect. I don’t know where to file this bug under, so for now, I’ll just store the info on my blog.

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KIND declaration quirk in Fortran

Here’s another quirk I found about KIND declarations in Fortran. Here are two ways to declare the KIND of a variable:

COMPLEX*16 :: a
COMPLEX(KIND=8) :: b

Here’s the interesting part: both of these variables have the same KIND! They are both ‘double precision’, generally using 8 bytes of storage for each of the real and imaginary parts of the number, or 16 bytes total. I say ‘generally’ because this can be compiler specific. Check out the module ISO_FORTRAN_ENV for more portability.

Update (2012-06-19): I learned why there is a difference here. It turns out that the declaration complex*16 is not part of any Fortran standard. Instead, it is a vendor extension that is supported by most, if not all, compilers today. So if you compile with strict standards-checking like gfortran -std=f2008, then you will receive an error. The correct way to write it is with complex(KIND=8).

Kepler Confirms First Planet in Habitable Zone of Sun-like Star

From NASA Science:

The newly confirmed planet, Kepler-22b, is about 2.4 times the radius of Earth. Scientists don’t yet know if Kepler-22b has a predominantly rocky, gaseous or liquid composition, but its discovery is a step closer to finding Earth-like planets.

This goes to show how we have so much more to learn about our universe. Astronomy is just one of the very exciting fields today.