Assela Pathirana

Random musings on various topics: Climate and water security, Small Island Developing States (SIDS), IT tools, Computer programming and Web-Applications, Citizen Science, ... Views are personal!

Slides of Peradeniya Seminar now on-line

Note: GFS, CPC and TRMM (GFAS) maps All of the maps in these pages should open a window with a larger image of the map, when clicked. However, it has been noted by some that this is not the behaviour with Internet Explorer Browser. Please use Mozilla Firefox to avoid this error, until it is corrected. The free download of Firefox is available. (Read this.) Cricket Worldcup Finals 2007 How to listen to live Audio? Read More GFS Weather Forecasts The GFS model of NOAA, previously known as AVN/MRF, covers the globe at T254 (roughly equivalent to 0.5x0.5 degrees) with 64 vertical levels. The model is run every 6 hours, forecasting 16 days in to the future. More... Plots for Indian Ocean New Section: Hydrology & Meteorology The real-time data is online again. Thanks for all who reminded me to get this done!! AtmosphericPlot CPC Rainfall Estimates, CPC Rainfall Estimates for Sri Lanka, GFAS Rainfall Estimates, GFAS Rainfall Estimates for Sri Lanka, etc. Check here., UNIX file system permissions tutorial Access permissions of every file and folder in a UNIX system is controlled by a system based on two identification numbers: user-identification number (UID) and group identification number (UID). Every file or folder should belong to a UID and GID. In practice is it hard to remember these numbers, so the accepted way is to map a user-name and a group-name to each number. In a typical stand-alone, UNIX computer, all UIDs along with these mappings are listed in the UNIX file /etc/passwd. Read more ...

What is new Adding new editor buttons to Mediawiki Depending on what type of article one is dealing with, there is always a number of specific directives that they end up using over and over again. Having these frequent tasks done at a click of a button saves time and increases the editing efficiency. Add Button Extension provides a simple framework to add custom buttons to Mediawiki editor. Read more ... This site was moved to a new hosting company Lately, there were some performance issues related to pathirana.net. Pages took increasingly more time to load and sometimes (when traffic is heavy) they even refused to load! I have decided its time to move internet service providers and just did that over the weekend. I was surprised to see how easy the entire process is. (Still it is not completely over, but things are working.) This experience may be useful for some others who, like me, are hosting small web sites as a hobby. Read more ... A Productive Desktop Environment for Scientists and Engineers - Part I Over the years of computer use for my work, I have settled down for certain practices that make my tasks a bit easier. Whether I am analyzing data, rigging-up a crude model, editing computer programs, writing a paper, creating a presentation or trying to keep my things organized. (Here, 'things' are strictly limited to 'things' that are stored in computer storage media. Anyone who has been to my office know the situation on other 'things'). In these pages I attempt to go through my 'tools of the trade' with the hope that someone in a similar situation will find them to be useful. Read more ... Now, Part I, Part II & Part III are online Growing Pains: A vegetable patch in Japan! All the tenants of the government housing in Namiki, Tuskuba city are entitled to have their own small strip of land allocated for cultivating. When this came in our way, we did not have a clue of what to do with this! Then someone suggested why not grow some vegetables. Read more... Four varieties of leaf lettuce grown together.

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