User's session ID under MS Windows 7 and Server 2008 R2

This may be needed sometimes under MS Windows 7 or Server 2008 R2, for any reason ...
find which session ID is associated to a user logged to the machine, interactively or by a Remote Desktop Connection (RDP).

There is a built-in command that you can run from the DOS shell or by the MS PowerShell which is called qwinsta and provides you with all the details about any user session at the moment.

More than 2 Remote Desktop Connections on a MS Windows Server 2008 R2

On a server running on MS Windows Server 2008 R2, by default configuration, only 2 Remote Desktop Connections (RDPs) are allowed. If you need to change that setup, read the following instructions at

http://technet.microsoft.com/en-us/library/cc753380.aspx

How to add slide numbers in a Microsoft Powerpoint slide

This is not a scientific computing issue ... but it took me a while till I found a decent explanation about how to do that ....

http://blogs.mccombs.utexas.edu/the-most/2012/06/04/when-the-slide-number-doesnt-show-in-powerpoint/

Mount a remote directory on a SFTP server to you local machine

How to mount to your local machine a remote directory on a machine having a running SFTP server:

http://blog.damontimm.com/how-to-mount-a-sftp-folder-ssh-ftp-on-ubuntu-linux-using-sshfs-fuse/

String operators for processing environment variables in Bash

String operators for processing environment variables:

http://www.linuxjournal.com/article/8919

Define a ROI by coordinates and size in ImageJ

Problem: I need to create a ROI in a very large 3D image (4020 x 4020 x 880) by ImageJ. The use of the mouse pointer is not so handy because it's not easy to locate the top-left vertex of the ROI at the exact wanted voxel location, due to the large size of the image.

Solution: Edit/Selection/Specify opens a plugin that allows defining manually the coordinates of the top-left vertex of the ROI, its height, width and on which slice to show you (if you are working with a stack of 2D images).

Two interesting articles about Data Science and Big Data,

http://sciencecareers.sciencemag.org/career_magazine/previous_issues/articles/2013_05_13/caredit.a1300099

http://www.spiegel.de/international/business/big-data-enables-companies-and-researchers-to-look-into-the-future-a-899964.html