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  A T M 6:11 AM on January 31, 2007 Permalink | Reply  

  Strength of Electric Current 

  

  I never had a good feel or the measure of the strength of electric current. Had questions like what’s the power of a current when they say 1A, 100 A or say 200 mA and so on. You don’t get a picture

  I was reading Floyd’s Electrical Fundamentals this morning. Very well illustrated book for electrical engineers.
  It has a section on Electric shock.

  Electric shock is actually caused by the flow of electric current and not voltage.
  But for electric current to flow we should have a voltage and resistance.

  Our body has a resistance typically from 10K ohm to 50k ohm
  If you touch a voltage source of 90 V, you would receive 9 mA of current, which is dangerous.

  1 mA – Slight perception
  10 mA – mild shock
  20 mA – severe mild shock
  200 mA – Could be fatal if it lasts for 5 seconds
  4 A – Heart paralysis ( which 4000 mA )
  5 A – Could burn the tissue and could be worse.

  So when you look at ratings on the electrical appliances next time, hope you’ll have some idea of how strong the current is.

   

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  A T M 8:59 AM on January 27, 2007 Permalink | Reply  

  Huttadalli Hutta 

  

  My first ever theatrical experience in my adulthood. Went to Ranga Shankara, yesterday evening to watch this kannada play Huttadalli Hutta ( Ant-hill within an Ant-hill ) written by TP Kailasam.

  Why I was keen on watching the play ?….I was curious about the delivery of the dialogue by the artists. Are they going to use a wireless microphone, or few standing mikes ?

  To my surprise, they do not use any. They speak little louder and hence probably I noticed that the hall was not a bigger one. It’s just big enough to be audible for the last row audience. Theatre Plays are are quite a pull among the audience. Tickets were sold out and the house was full.

  The plot of the play is simple. It is that of a couple who exploit the innocent through the several tricks they play.

  I been little detached from kannada literature and havent read much in a long while. Wanted to pick up this “Samagra Sanna Kathegalu”, but was in two minds…if am really so keen on it. Want to badly revive my taste for reading… but ..but but…

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    Anonymous 4:04 PM on January 31, 2007 Permalink

    hey Ranga Shankara is a lovely place to go .. I watched ” Witness to the Prosecution” by Agatha Christie .. it was too cool!

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  A T M 1:51 PM on January 25, 2007 Permalink | Reply  

  Mobile IP Protocol 

  To understand the function of Mobile IP, a great analogy to use is the Postal Service.
  

  1. Postal mail is sent to you by placing a letter (the packet payload) in an envelope addressed to you (IP header).

  2. The letter arrives at your local post office and is routed to you at your Home Address, as shown in Fig.

  3. When you move, you tell the local post office (Home Agent) to forward packets to your new location (Care-of Address [CoA]). Now, when a letter addressed to your Home Address arrives at your local post office, it can now be readdressed (tunneled) to your new location (CoA).

  4.The letter then arrives at the post office that services your new location (Foreign Agent [FA]) and is delivered to you at your new location (CoA), as shown in Fig. This mail delivery is done with no effort by the original sender of the letter.
   
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  A T M 8:08 AM on January 23, 2007 Permalink | Reply  

  FREE AIR 

  

  At Petrol pumps they have this FREE AIR facility.

  Air pumps got this lengthy pipe to reach to the tyres. Since 2, 3 and 4 wheelers have different requirements for air pressures on front and back wheels,Air-filler person has to get up and go back and forth to adjust the pressures at the panel.

  It’s painful when you have to do this job for thousands of vehicles every day.
  I pity those air-filler person and handover a 1 Rupee coin every time they do this, though it’s FREE AIR.

  Can’t we have a pressure-adjuster control at the tip of the pipe instead at the panel.

  When we do such amazing this wirelessly, this should not be a tougher task.
  Any mechanical engineers, please file a patent and fix this.

  Prashanth Kumar J is discussing. Toggle Comments

   
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    Prashanth Kumar J 1:14 PM on April 3, 2007 Permalink

    I have seen a air-filler which has pressure adjuster at the end of the pipe. Don’t remember where.

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  A T M 3:00 PM on January 21, 2007 Permalink | Reply
  Tags: IIT   

  Sipping coffee at IIT-M Coffeeday 

  Sipping coffee at Coffeeday, IIT chennai campus deserves few lines.
  I treated myself for sitting through a marathon day of 30 odd talks.  With capuccino and two chocolate cookies.

  It will always remain in my wishlist. Going back to school and study in a campus of this nature.
  Cycling all around, Having great conversations over coffee, Listening to the talks of the accomplished, etc…in an atmosphere like this.
  Carrying sweet memories of IIT chennai.

  Forgot to mention this in my previous post….apart from seeking venture funding, what every other presenter had in common was, “We are looking for bright people” remarks.

   
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  A T M 2:37 PM on January 21, 2007 Permalink | Reply  

  Day 2 : Proto.in 

  

  Sat through 30 Presentations morning till evening. Just noted down the presentation names in my diary. Folks who presented today were not completely new faces. Have seen them at bar camp bangalore. Sloka, Seraja, picsquare, tazzaa to name a few.

  What appealed to me, in no particular order, from the top of my head are these :

  - Interface of spoteazy. Just two hops for a buying decision

  - Features which are getting added to SeRaja and Taazza. I dislike the name Seraja though. It’s such a turn off.

  - Presenter of novatium and the approach of novatium for taking computing to the masses. Indian answer to 100$ laptop ?

  - Efforts of Saloni to reach the rural mass with desicrew. Rural BPO.

  - Unleash networks’ network analyser ( protocol visualiser)

  - TracBac’s idea of collaborating visually

  Catch more pics of the event here

  Saloni is discussing. Toggle Comments

   
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    Saloni 10:09 AM on January 22, 2007 Permalink

    Thanks Arvind. Am glad you liked our work. The point is to make Rural BPO feasible as a commercial activity. We can prove that it is feasible to publishers/ existing BPO companies/ government departments/ PSUs and other organizations.

    For everyone reading this blog post/ comment please contact us at http://www.desicrew.in to do a pilot and check for yourself if a rural BPO works for your organization.

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    A T M 1:35 PM on January 22, 2007 Permalink

    Thanks for dropping in a line Saloni. IT’s penetration so far in urban areas has been phenomenal. Real challenges lie when it reaches the rural mass. Hope you will continue to do this good work.

    What’s your email ?

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  A T M 1:00 PM on January 20, 2007 Permalink | Reply  

  First day in Chennai for proto.in 

  Landed here this morning at Chennai Railway station. Staying with my friend and college time project mate Mallikarjun Raddi.

  Since the event is tomorrow, had no idea as to how to spend this day.
  It was noon when I set out. Did nothing in particular, but aimless wandering.

  Asked my friend, who had to go to office, if there’s a MG road like place.
  He pointed me to Mount Road.

  It’s not as pleasant a feeling as in MG Road. Spent some time at Higginbothams and wandering in Wallers road, equivalent of SP road of blore. Had two chapatis in lunch.

  I doubt if the winter ever sets here. It’s sweaty sweaty since morning and had to take a cold water bath!

  It looks to me as a metro city which is aged.
  Bright colors. Big Hoardings. Ugly buses.

  Am heading to spencer plaza in the evening. Looks like a very popular forum-kinda shopping mall.

   
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  A T M 5:08 AM on January 19, 2007 Permalink | Reply  

  WiMAX now in Bangalore 

  I observed one funny line this morning in Hindu’s Bangalore edition.Article is titled : WiMAX now in Bangalore

  
  

  WiMAX is more efficient in preventing virus attacks.

  The staff reporter probably has been told by the Aircel to do some PR work.The ill-educated reporter not taking any pain to do some research has printed this line.

  If you read this line in isolation, it misleads to think of WiMax as an Anti-virus ))

  WiMax ( Worldwide Interoperability for Microwave Acess ) is an access technology. It works like an ‘optical cable’ in the wireless world with a much higher bandwidth.

  Just another example of the opportunity which exists in Tech-Reporting.
   
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  A T M 7:56 AM on January 16, 2007 Permalink | Reply  

  That’s what is Science. 

  
  

  Any ball tossed up on earth’s surface returns with an acceleration of 9.6 m/sec2.
  Throw it any number of times. I mean ANY.
  It returns with the same acceleration.
  That is consistency.
  And it is measurable.

  That’s what is Science all about. Consistently measurable with the same accuracy.

  Anything which is immeasurable, or not yet understood is still a question to science.
  It accepts challenges.

  
  …..I was writing to a colleague on Science Vs God Debate.

   
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  A T M 7:43 PM on January 15, 2007 Permalink | Reply  

  Historica 

  

  This is what it read in Businessline’s supplement this morning.
  I quote two lines.

  Every job on this planet is boring and monotonous, if you don’t understand the science behind it.
  So very true.

  But let me take some time to talk about history than science.
  Be it Iraq crisis, India’s Satelite Program, New book of Richard Dawkins,Cricket team for the worldcup or New oil reserves in Bay of Bengal,What keeps me interested in a wide array of topics is the knowing of a bit of history in most of them, if not all.

  Subject of History scared me in my High school. It required us to write page length answers in english. No one gave a feeling that History has a ’story’ in it.

  When I grew up I happened to read an Encyclopaeida of world history. It had all the colors and pictures. Where did civilisations start ? when did farming start ?Why did they Discover new lands ? Who colonised whom ? World wars.etc
  View of the World, for me changed like never before. This is what I read in my Schooling days!!

  Now, years later, the first thing I do before I delve into a new topic is trying to know its History and get a ‘bigger picture’, as they say. This is so very important to appreciate and make sense of the present.

  Last Friday evening I spent sometime looking for Encyclopaedia of world history.I found few. But they are still far from my imagery of that encyclopaedia. Either they lack the depth and content or their presentation is not upto the mark.

  I am looking for one : Encyclopaedia of world history.