Skip to main content

Posts

Okular does not exit full screen mode

See http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=508634 Description : Once the fullscreen mode is turned on in Okular it refuses to go back and hides even the menubar. Even pressing ctrl+shift+f does not help. Closing Okular and opening another file does not help. It stays in that fullscreen mode. Workaround : I am posting the workaround here. Unfortunately you have to manually edit the okularrc file each time you go fullscreen. Goto the folder $HOME/.kde/share/config (or a similar folder for kde4- .kde4/share/config/). Open okularrc in gedit. It would show something like - [Desktop Entry] FullScreen=true [MainWindow] Height 900=901 MenuBar=Disabled State=AAAA/wAAAAD9AAAAAAAABaAAAAOEAAAABAAAAAQAAAAIAAAACPwAAAABAAAAAgAAAAEAAAAWAG0AYQBpAG4AVABvAG8AbABCAGEAcgAAAAAAAAAFoAAAAAAAAAAA Width 1440=1441 [MainWindow][Toolbar mainToolBar] Hidden=true [Notification Messages] presentationInfo=false Enable the menubar : MenuBar=Enabled. Disable fullscreen : FullScreen=false Fire up Okular agai...

Linux keyring trouble

I keep getting this notice some time now while using Nautilus and Evolution. Enter password for default keyring to unlock Gnome Keyring is the method how Nautilus stores the passwords like the password manager in Firefox. And it needs a super pass for doing that. Just move the ~/.gnome2/keyring to somewhere else. If it still creates problems then more elaborate procedure is needed. See here - http://ubuntuforums.org/showthread.php?t=192281&highlight=GNOME+session

How Hamilton invented the quaternions

This is not my post. I copied it from John Baez' site @ http://math.ucr.edu/home/baez/dublin/index.html#hawking. This describes how Hamilton invented the quaternions. In 1835, at the age of 30, Hamilton had discovered how to treat complex numbers as pairs of real numbers. Fascinated by the relation between complex numbers and 2-dimensional geometry, he tried for many years to invent a bigger algebra that would play a similar role in 3-dimensional geometry. In modern language, it seems he was looking for a 3-dimensional normed division algebra. His quest built to its climax in October 1843. He later wrote to his son: Every morning in the early part of the above-cited month, on my coming down to breakfast, your (then) little brother William Edwin, and yourself, used to ask me: "Well, Papa, can you multiply triplets?" Whereto I was always obliged to reply, with a sad shake of the head: `No, I can only add and subtract them". The problem was that there exis...

VOB file merger for Linux

This can be done in a variety of ways. 1. cat file01.vob file02.vob >newfile.vob 2. mpgjoin file01.vob file02.vob -o newilfe.vob 3. mpgcat file01.vob file02.vob -o newilfe.vob 4. mpgtx -j file01.vob file02.vob -o newfile.vob You can also look into GOPChop and/or DVBCut, vobcopy -i /path/to/ripped/dvd/files/VIDEO_TS -n1 -l -o /path/to/put/files/file.vob ^^ -i = input path. The complete path -n = title number, if your not sure, use lsdvd or vobcopy -i /path/VIDEO_TS -I -l enables large file support. -o is the path to output the files. You can also use vobcopy to rip from the DVD driver.

dS as FRW

deSitter spacetime in the representation as a spatially flat Robertson-Walker universe, its metric is See eqn. 3.24 of Ford : arXiv:gr-qc/9707062v1 These coordinates cover one-half of the full deSitter space, but this is not a serious problem for our purposes. But in the context of inflationary models, one is interested in spacetimes which involve only a piece of deSitter space. See for example Kima, Oh and Park ( arXiv:hep-th/0212326v1 ) for discussion on relation between dS and FRW.

my first poem

উজ্জল মন্দার নিমিত লোচন মল্লিকা তরুদল কজ্জল লেপণকারী তার হাতে সপে দিতে পরান পারি

My cover design for the book D-branes

I have designed a cover for the book D-branes by Prof. Clifford Johnson. Why I did it? Because I was feeling sad that such a great book has such an uninteresting cover.

Conformal Stokes theorem

Both the conformal Stokes' theorem and the form of delta function δ(x) in complex space are given in page 119 of di Francesco (See equation 5.33 - 5.36). δ(x) = 1/π ∂ z' (1/z) where z is the complex coordinate. z = (x + i y) /2 & z' (z bar) = (x - i y) /2

Srimad Bhagavad Gita : online resources

1. Audio sound of the sacred song: the bhagavad gita, in three languages http://www.gitainternational.com/hindi-audio.htm chapter wise http://www.gitainternational.com/audio/audioindex_chapter.htm 2. Audio Gita: http://www.gitainternational.com/audio/audioindex.htm Select Entire Chapter or any verse: chapter + individual verse . very helpful. 3. bhagavad gita in pictures http://www.bhagavad-gita.us/articles/687/1/The-Bhagavad-Gita-in-Pictures/Page1.html 4. http://www.bhagavad-gita.org/ Complete breakdown of Srimad Bhagavad Gita verse by verse with explanations and Sanskrit audio pronounciation.

Customised search in Linux using find

Below is a code to customise search in Linux using find. find would recurse through all the directories. I needed to omit some directories which I knew didn't have the file I was looking for but instead have games. So recursing through them would cause enormous processor overhead and time loss. So I wrote a code in shell script to omit specific directories.. cd / for aa in `ls` do if [ "$aa" != "resident_evil" ] ; then if [ "$aa" != "usr1" ] ; then if [ "$aa" != "usr2" ] ; then if [ "$aa" != "usr3" ] ; then if [ "$aa" != "unreal" ] ; then if [ "$aa" != "quake3" ] ; then echo -e " Current search path: " cd $aa pwd find . -name "*.a" fi fi fi fi fi fi cd / done