Google earth animations of various tidal constituents.

For my intro to Oceanography class, I made animations of the barotropic tide sea surface height. You can find them [here](http://pong.tamu.edu/~rob/google_earth_tides). Trust me, they are _very_ slick.

Removing non-english localizations on mac os x

I found this command on macupdate:

sudo find / -not -name English.lproj -name "*.lproj" -exec rm -r {} \;

and ran it. It seems to have saved about 3 Gb from the Application directory, and about 5 GB total.

Spaces and Terminal on Mac OS X Leopard 10.5.3

In a [recent post](http://daringfireball.net/2008/05/spaces) on [Daring Fireball](http://daringfireball.net/), John Gruber describes how some new small changes in Spaces in Mac OS 10.5.3 have made it usable.

I use the terminal quite a bit, and I have noticed this small tip. If you use ⌘-` you will cycle through the windows within one space/screen (i.e., you won't switch virtual screens). ⌘-→ or ⌘-← will cycle through _all_ of the terminal windows, even on other spaces screens.

Delayed login for ssh

I was suffering delays logging in between the head node and cluster nodes. I tried all the usual tricks -- mainly editing /etc/hosts. I tracked the problem down with

ssh -vvv c0-0

which showed that the delay was in xauth. Fine. What I needed to do was turn on ForwardX11Trusted, it was the *Trusted* part that was missing. This can be done with ssh -Y, or by editing /etc/ssh/ssh_config and adding a line

ForwardX11Trusted yes

This is needed to get tools like cluster-fork to work with the Trusted forwarding.

Interview with Donald Knuth

I've seen [this interview with Donald Knuth](http://www.informit.com/articles/article.aspx?p=1193856) linked a few times, and I also found it very interesting. In particular, I found it interesting that he:

- uses EMACS/TeX -- after writing everything by hand.
- does not particularly care for unit tests
- is a big fan of (i.e., invented) [Literate programming](http://www.literateprogramming.com/)
- is not a big fan of multicore processing (he does note, however, that physics and biology as exceptions where multicore programming makes sense..)

I have to admit, that I am on his side in terms of the unit testing and literate programming issues. I find that my biggest chalange in programming is not getting the code right (i.e., unit tests), but rather designing the way the function/class will behave for the user. Writing down what you expect the program to do in different cases (i.e., the API documentation) seems to be the best way to write a good, solid program.

NetCDF build notes for Mac OS 10.5 with ifort and gfortran

I have recently written down the steps I needed to build netcdf3, hdf5, and netcdf4 on my Mac using both ifort and [gfortran](http://r.research.att.com/tools/). Details follow

Python build script for roms

I wrote a build script for ROMS in python based on some of the other build scripts (in bash and Cshell) I have seen. The usage is as follows:

Create a directory with a header file called case_name.h in it. This should have the CPP defs for your particular case. Then run the build script like this:

build-roms.py case_name

Options, as seen from the help are:

-h, --help Print this message

--fort=[ifort] Specify fortran compiler
--netcdf=[4, 3] Version of NetCDF to use [default is NetCDF4]
-j=n Parallel make [n = number of procs, default is 4]

--mpi Compile using mpi
--clean Delete Build scratch directory before build
--debug Compile in debug mode
--root Specify ROMS_ROOT_DIR

This script creates a Build directory in the local directory, where the actual compilation happens. Analytical things can be defined in an optional Functionals directory, just like with the other build scripts. To see the script, continue...