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Obama is a Muslim?

Pew has conducted a poll which reveals that 18% of U.S. residents believe that Barack Obama is Muslim, up from between 11% from March 2009 to August 2010, whilst the number who believe he is a Christian has declined from 48% to 34%, whereas the number who don't know his religion has increased from 34% to 43%.

Secularism versus Theocracy: Some Recent Examples

A survey of doctors in the United Kingdom has shown there is a strong correlation between those of religious faith and the types of drugs that they prescribe, with critically ill patients not being informed of strong pain killers which, whilst pallitive, can shorten life. One wonders what doctors will be like if they find themselves in such a situation - or will they use the drugs that they know about to relieve the symptoms?

Installing NCARG and NCL on a 64-bit AMD Opteron Cluster running CentOS 5 Linux

NCAR is the (US) National Centre for Atmospheric Research, NCARG is a graphics library, maps database and applications for the same, and NCAR Command Language (NCL) is interpreted language for the above. Installing the software from source is not recommended: "We highly recommend that you use a precompiled NCL binary rather than attempting a build from source code....

Installing GCC on a cluster running Linux

The GNU Compiler Collection (usually shortened to GCC) is a compiler system for C (gcc), C++ (g++), Java (gcj), Ada (GNAT), Objective-C (gobjc), Objective-C++ (gobjc++), and Fortran (gfortran). Circumstances will arise when you will want to use a particular version of GCC rather than the system version.

Set the environment variables manually for GMP, MPFR and MPC. Or use modules.


module load gmp/4.3.1
module load mpfr
module load mpc

Drupal Bookmarks Module

When developing a website, and in particular an intranet, for an organisation there is often a debate on what should be on the frontpage.

Different departments and different individuals all seem to have "strong opinions" on the matter.

Installing LAMMPS on a 64-bit AMD Opteron Cluster running CentOS 5 Linux (again)

LAMMPS (Large-scale Atomic/Molecular Massively Parallel Simulator) is used to model atoms or as a parallel particle simulator at the atomic, meso, or continuum scale. It has potentials for soft materials (biomolecules, polymers) and solid-state materials (metals, semiconductors) and coarse-grained or mesoscopic systems. You may remember a difficult install from the past.

Installation of MVAPICH2 for Different Compilers

MVAPICH and MVAPICH2 is an implementation of MPI for computing systems and servers using InfiniBand, 10GigE/iWARP and RoCE & etc networking technologies.

Installation consists of downloading the tarball into an appropriate directory, extracting it, loading the enviroment variable modules, using of some previously established configuration files, runnig make and make install, and establishing the symbolic links. Note that MVAPICH and MVAPICH2 are entirely different products.


cd /usr/local/src/MVAPICH2

PDT/TAU Installation on a 64-bit AMD Opteron Cluster running CentOS 5 Linux

Tuning and Analysis Utilities (TAU) is a program and performance analysis tool for high-performance parallel and distributed computing with a suite of tools for static and dynamic analysis of programs written in C, C++, FORTRAN 77/90, Python, High Performance FORTRAN, and Java.

You'll also need the Program Database Toolkit (PDT), also available from the same location. Let's install that first. You'll need to set your environment variables. You use modules, right?


module load gcc/4.4.4
modulel load openmpi-gcc/1.3.4

Installing R and Updating Packages (with sed and Perl fun)

R is a language and environment for statistical computing and graphics. To install R download the tarball to an appropriate place and extract e.g.,

Installing MrBayes for MPI and 64-bit

Let the home page describe what it is about (in the worst possible English): "MrBayes is a program for the Bayesian estimation of phylogeny. Bayesian inference of phylogeny is based upon a quantity called the posterior probability distribution of trees, which is the probability of a tree conditioned on the observations. The conditioning is accomplished using Bayes's theorem.

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