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Showing posts from January, 2011

Telescope under urban night sky

Image
I recently posted about my new telescope.I watched the moon (Photos posted in that same blog) first. It was a full moon and craters were easily visible with my 20 mm eyepiece ( 45x magnification ).With this magnification moon was just covered by the viewing area which is about 1 degree in diameter. (Orion's belt is 3 degree's wide.).However the findoscope that rides above the main telescope pipe has a greater viewing area to locate objects and point the cross-hairs to bring it inside the viewing area of the main telescope.With the 4mm eyepiece magnification is approximately 180x and moon's craters  were even huge and only part of the full moon was visible at a time with this eyepiece.

I just held  my small digital camera infront of the eyepiece of telescope and clicked few times , fortunately some pictures came good.It was full Moon but I could not center the camera properly , so the partial image came like eclipse. I need a "digital eyepiece"  that connects to a …

Telescope under urban night sky

Image
I recently posted about my new telescope.I watched the moon (Photos posted in that same blog) first. It was a full moon and craters were easily visible with my 20 mm eyepiece ( 45x magnification ).With this magnification moon was just covered by the viewing area which is about 1 degree in diameter. (Orion's belt is 3 degree's wide.).However the findoscope that rides above the main telescope pipe has a greater viewing area to locate objects and point the cross-hairs to bring it inside the viewing area of the main telescope.With the 4mm eyepiece magnification is approximately 180x and moon's craters  were even huge and only part of the full moon was visible at a time with this eyepiece.

I just held  my small digital camera infront of the eyepiece of telescope and clicked few times , fortunately some pictures came good.It was full Moon but I could not center the camera properly , so the partial image came like eclipse. I need a "digital eyepiece"  that connects to a …

Very large text file and vi Editor

Once I entered to the world of high scalable computing it became common to handle file larger than 2 Gb. Usually files are more than the amount of ram a computer has. for e.g the English Wikipedia dump is around 9 Gb with 3,500,000 articles. The whole Wikipedia seems to be around 29 Gb. The whole file could not be open in common windows editors like notepad or NotePad++.
LTFViewer is a decent option in windows to open very large files and probably it loads one page at a time into memory.I went back to VI editor in Linux .Here goes some useful commands.To switch from Insert Mode to Command Mode, press the Escape (Esc) key. http://www.sharpened.net/resources/commands/viLet me know via comment or email if you know any other software in windows which can open very huge text files.

Very large text file and vi Editor

Once I entered to the world of high scalable computing it became common to handle file larger than 2 Gb. Usually files are more than the amount of ram a computer has. for e.g the English Wikipedia dump is around 9 Gb with 3,500,000 articles. The whole Wikipedia seems to be around 29 Gb. The whole file could not be open in common windows editors like notepad or NotePad++.
LTFViewer is a decent option in windows to open very large files and probably it loads one page at a time into memory.I went back to VI editor in Linux .Here goes some useful commands.To switch from Insert Mode to Command Mode, press the Escape (Esc) key. http://www.sharpened.net/resources/commands/viLet me know via comment or email if you know any other software in windows which can open very huge text files.

Assembling and setting up the telescope

I recently boughtCELESTRON PowerSeeker 127EQ Telescope  and found the following video very informative and short for quick setup [youtube http://www.youtube.com/watch?v=te8a_YwyvLw] I tried to set it up and take few pictures by just placing my small digital camera (Nikon 3200) and result was better than expected http://picasaweb.google.com/s/c/bin/slideshow.swfHowever I think buying a digital eyepiece  would help everything capturing in a computer digitally.
Other way is to use Universal Digital Camera Adapter for Astrophotography.I will keep updating my notes as I keep reading and discovering  more information.

Assembling and setting up the telescope

Image
I recently boughtCELESTRON PowerSeeker 127EQ Telescope  and found the following video very informative and short for quick setup

I tried to set it up and take few pictures by just placing my small digital camera (Nikon 3200) and result was better than expected

However I think buying a digital eyepiece  would help everything capturing in a computer digitally.
Other way is to use Universal Digital Camera Adapter for Astrophotography.
I will keep updating my notes as I keep reading and discovering  more information.

Handy Linux commands

Listing attached devices :

sudo fdisk –l

Listing All the bus info   :

sudo lshw -businfo

Add path to $PATH  in  ~username/.cshrc :

setenv PATH  ${PATH}:<path_to_be_added>

to know the disk usage :

df -h

Size of a directory including the subdirecotory

du -ch | grep total

Find number of files in a directory including sub-directories

find . -type f   | wc -l

Handy Linux commands

Listing attached devices :

sudo fdisk –l

Listing All the bus info   :

sudo lshw -businfo

Add path to $PATH  in  ~username/.cshrc :

setenv PATH  ${PATH}:<path_to_be_added>

to know the disk usage :

df -h

Size of a directory including the subdirecotory

du -ch | grep total

Find number of files in a directory including sub-directories

find . -type f   | wc -l

Kishore Kumar Sad Songs

Here is yeh another playlist of evergreen sad songs of Kishore Kumar (I call him god of Indian Music Industry ). Enjoy.http://www.youtube.com/p/B7281473BEB0DFDF?hl=en_US&fs=1

Kishore Kumar Sad Songs

Here is yeh another playlist of evergreen sad songs of Kishore Kumar (I call him god of Indian Music Industry ). Enjoy.

Hemanta Kumar’s Golden Songs

I have been a big fan of Hemanta Kumar (The great Hindi/Marathi and Bengali Playback singer ) since the days I 1st came to know songs in the films in TV are not sang by the actor himself during acting :) . I have compiled the following playlisthttp://www.youtube.com/p/74FD4864597FB6B3?hl=en_US&fs=1

Hemanta Kumar’s Golden Songs

I have been a big fan of Hemanta Kumar (The great Hindi/Marathi and Bengali Playback singer ) since the days I 1st came to know songs in the films in TV are not sang by the actor himself during acting :) . I have compiled the following

Sunday hiking near Hi-Tech City

As part of my new year resolution I had slept (relatively)early on the 1st day of the new year. This gave me a chance to material a planned hiking on the early Sunday morning of 2nd day of 2011.When I woke up it was little late for watching Saturn (rise around midnight and at zenith just before sunrise) however I was quite impressed with crescent Moon and Venus. http://maps.google.com/maps/ms?ie=UTF8&msa=0&msid=214778165466350903712.000498d59a81898067f48&t=f&ecpose=17.42651368,78.377261,944.13,0,44.996,0&ll=17.429836,78.377261&spn=0.001459,0.003214&output=embed
View Hiking Near Hi-Tech in a larger map
View Hiking Near Hi-Tech in a larger map I won’t write much about the hiking as it has been wonderfully jotted down in Kunal’s Bloghttp://kunal.wordpress.com/2011/01/02/a-sunday-well-spent/I http://picasaweb.google.com/s/c/bin/slideshow.swfFollowing are the plus I experienced1.Fresh air (Needed after my sinus surgery :))
2.Get a lot of extra time early m…

Sunday hiking near Hi-Tech City

As part of my new year resolution I had slept (relatively)early on the 1st day of the new year. This gave me a chance to material a planned hiking on the early Sunday morning of 2nd day of 2011.When I woke up it was little late for watching Saturn (rise around midnight and at zenith just before sunrise) however I was quite impressed with crescent Moon and Venus.
http://maps.google.com/maps/ms?ie=UTF8&msa=0&msid=214778165466350903712.000498d59a81898067f48&t=f&ecpose=17.42651368,78.377261,944.13,0,44.996,0&ll=17.429836,78.377261&spn=0.001459,0.003214&output=embed
View Hiking Near Hi-Tech in a larger map
View Hiking Near Hi-Tech in a larger map
I won’t write much about the hiking as it has been wonderfully jotted down in Kunal’s Blog
http://kunal.wordpress.com/2011/01/02/a-sunday-well-spent/


Following are the plus I experienced
1.Fresh air (Needed after my sinus surgery :))
2.Get a lot of extra time early morning , don’t have to rush to office
3.…