Monday, December 23, 2013

LaTeX: LaTeX Templates for Nature, Science and for various physics journals

Here is where you can find LaTeX templates for various physics journals:

Nature: [Download here]

LaTeX templates for other Physics Journals:  [Click here ] 

Friday, October 4, 2013

Mac: Install OPEN MPI on Mac OS

Step 1 : If you haven't installed XCODE. Download and Install XCODE

Step 2 :
Install Open MPI. Download the latest stable release of Open MPI from the Open Source High Performance Computing website.

Step 3:
Open terminal and Go to the downloaded directory

Extract the downloaded archive :
tar -zxvf openmpi-1.6.5.tar.gz

Open terminal and Go to the extracted directory:
cd /path/to/extracted/openmpi-1.6.5

Run the following commands
./configure --prefix=/usr/local
make all
sudo make install

Step 4: Add OpenMPI path to your path, run the following commands export

export LD_LIBRARY_PATH=/usr/local/openmpi/lib:$LD_LIBRARY_PATH

Step 5: Compile your C/C++ program
For C:
mpicc -o myProgExe myProg.c

For C++:
mpic++ -o myProgExe myProg.cpp

Step 6: Run, where -np is the number of processor to run on.
mpirun -np 8 myProgExe

Tuesday, August 20, 2013

Gmail Tricks ;), Get more usage out of your Gmail address !

1. Create Filters with multiple Senders
Use the 'OR' keyword in between emails. 

Set up the filter as " OR" and continue from there.

2. The Plus Sign (+) in your Gmail address

For example you have an email address:, then
  • = =
Gmail ignores anything after the + sign.  But sends/recieves with the full email address.

So, Why do you want to use the + sign ? To manage junk and unwanted emails :)

You can use this kind of email address at some social or coupon websites to register and later manage(probably delete) all their associated emails or notifications. 

So for example, you could register at these websites with . And then create a filter with and you can continue from there...

So from next time when u register, which requires your email, or when you post a contact email on your website. You can create a filter and manage these emails to be automatically archived, deleted, etc...

3. The dot Sign (.) in your Gmail address
For example you have an email address:, then
  • = = =
Gmail ignores periods (.) as characters in email addresses. 

Thursday, August 15, 2013

jQuery: Disable backgroud scrolling when simplemodal modal box is opened.

When using jQuery simplemodal, when the modal box is box is opened , following is one way to disable the scrolling in the background.

We change the css overflow property of the background in the onShow and onClose functions..


      maxWidth:800, minHeight:800,  
       onShow: function(dialog) {  
                 //YOur remaining javascript...  
       onClose: function(dialog) {  

Wednesday, April 24, 2013

CakePHP: Update model after changing database

After changes are made in the Database, to see the changes updated or reflect to the cakephp models, do the following
  1. Delete all the temporary model files from app/tmp/cache/models/*.
  2. In app/Config/core.php, change the debug value from 0 to 3, load your app in browser and again change it from 3 to 0 

Tuesday, March 12, 2013

Run Internet Explorer 7, 8, and 9 in Mac OS X


Following is the post from

Notes: the admin password for all of the IE VMs is “Password1″ without the quotes. This has been tested and confirmed to work with Mac OS X 10.7 Lion and Mac OS X 10.6 Snow Leopard.
  1. Download & Install VirtualBox – Download Now (direct .dmg download link) – visit VirtualBox Downloads page
  2. Launch the Terminal (located in /Applications/Utilities/)
  3. Decide which versions of Internet Explorer you want to download and install – each version of Internet Explorer is contained within a separate virtual machine that runs within VirtualBox. In other words, if you want to run Internet Explorer 7, 8, and 9, you will need to download three separate VM’s, which may take a while so keep that in mind. Select the text below and copy it:
    • Install ALL versions of Internet Explorer: IE7, IE 8, and IE 9

    • curl -s | bash
    • Install Internet Explorer 7 Only

    • curl -s | IEVMS_VERSIONS="7" bash
    • Install Internet Explorer 8 Only

    • curl -s | IEVMS_VERSIONS="8" bash
    • Install Internet Explorer 9 Only

    • curl -s | IEVMS_VERSIONS="9" bash
  4. Copy and paste the selected command from above into the Terminal and hit return, this will start the download and conversion process. How long this takes depends on your internet connection and how many versions of Internet Explorer you chose to install
  5. Launch VirtualBox and boot Windows & Internet Explorer – select the virtual machine corresponding to the version of Internet Explorer you intend to use: IE7, IE8, IE9, then click on the “Start” button to boot that Windows machine with that version of Internet Explorer.
Remember that the default Windows admin password is “Password1″, it’s also the password hint within the VM should you forget it. 
That’s really all there is to it. These commands are part of the ievsms script from xdissent and it manages the entire download, conversion, and installation procedure, it doesn’t get much easier.
VM Snapshots Circumvent Microsofts 30 Day Limitation
The other great thing about this method is that it circumvents Microsofts 30 day limitation by utilizing snapshots, a feature built into VirtualBox. This preserves the original Windows VM state and allows you to continuously use the IE virtual machine without any time limitation simply by reverting to the original snapshot once the 30 day lock occurs.
To use a snapshot after the 30 day Windows expiration, just open VirtualBox, select the IE VM, and click on the “Snapshots” button. From here you can boot from the original snapshot that was created and use IE again for another 30 days. You can do this indefinitely, effectively having a clean IE test environment forever.

Wednesday, February 20, 2013

SVN: Moving subversion repository from one server to another server

This works between any kind of servers windows or linux...

Step 1: Backup / create a dump of old repository
svnadmin dump /path/to/repository > repo_name.dump 

Step 2: Create a new repository on the new server
svnadmin create /path/to/repository 

Step 3: Import the the old repository
svnadmin load /path/to/repository < repo_name.dump

Wednesday, January 2, 2013

Matlab: Sort 2D array with respect to one column

sort function in Matlab, sorts matrix columns independently.
B = sortrows(A, column) sorts the matrix based on the columns specified in the vector column. 


>> A = [2 10; -1 20; 5 40]

A =

     2    10
    -1    50
     5    15

>> sortrows(A, 1)

ans =

    -1    50
     2    10
     5    15

>> sortrows(A, 2)

ans =

     2    10
    -1    50
     5    15

Tuesday, January 1, 2013

MATLAB: String tokenizer, string split

myStr = 'one_two_three';
pieces = regexp(myStr , '_', 'split')

%Output would be an pieces array with 3 elements.
pieces =

    'one'    'two'    'three'