Wednesday, July 01, 2015

Color vision sensitivity test

The following is a fun color sensitivity grading test. If you want a proper color vision test, you are looking for the simple Isihara's chart or the complicated Farnsworth-Munsel 100 hue test. You could see what the color blind actually see.

 Or make or buy a fun gag gift for the color blind to fool them.

How do bicycles stay upright and the story of learning to ride a backwards bike

Angular momentum and gyroscopic precession are critical to keeping a bicycle balanced.  To see why this is the case, see what happens if the brakes lock the wheels in place while the bicycle continues to move forward by skidding along the road.

It sounds like the problem was redefined in such a way as to eliminate the 'conservation of angular momentum' as being a significant contributor by someone who invented a very awkward bike that remains stable without angular momentum. If you are talking about a normal bike that people actually ride, then it is you who is redefining the problem. Perhaps normal bikes do rely heavily upon conservation of angular momentum in order to remain stable. The fact that another bicycle was created that does not rely on this effect says nothing to those bikes which do. In other words, it is a false equivalence. The term bicycle is much too vague, as multiple types can be constructed that rely on different factors in order to achieve stability. Just because one type of bicycle eliminates the need for one factor does not make that factor irrelevant for other types of bicycles.

Tuesday, June 30, 2015

Xiaomi Redmi Note 4G cheapest price in India - Rs 7999/- on Amazon, Flipkart and Snapdeal

Redmi 4G Note at Rs 7999/- with additional 10% discount for Standard Chartered at SnapDeal

Xiaomi's Redmi Note 4G was always an excellent budget price phone with very good features. Good news, from today, Xiaomi has reduced the price of this phone from Rs 9,999/- to Rs 7,999/-

Ypu could also have a look at the comparison of Xiaomi Mi4i, Moto G2, and Zenfone 2.

This is applicable over Amazon , Flipkart and Snapdeal.

No need to try your luck at a flash sale like earlier - this is open to all.
And it is eligible for Cash on Delivery.

NASA reports a Bright Sky Event Over Southeastern United States – June 29

Published on 29 Jun 2015
There was a bright event seen across several Southeast states last night at 12:29:30 AM CDT (1:29:30 EDT). Based on the data we currently have, this object was not a meteor or fireball.

A NASA camera I believe caught a glowing object travelling over the southeastern US States. NASA have said that they have ruled out that it was a meteor of any sort but more than likely to be a part of space debris. 

There was a bright event seen across several Southeast states last night at 12:29:30 AM CDT (1:29:30 EDT). Based on the data we currently have, this object was not a meteor or fireball. Tracked by 5 NASA cameras in the SE, it is moving at roughly 14,500 miles per hour, which is too slow to be a meteor. As you can see in the video, it has also broken into multiple pieces, which, combined with the slow speed, indicates a possible reentry of space debris. There are over 120 eyewitness accounts on the American Meteor Society website ( 

Monday, June 29, 2015

In the Unlikely event that Maggie from XKCD, otherwise known as Margaret the Destroyer, is coming for you

Otherwise known as Margaret the Destroyer, I will bring pain to the the Great One. Then again, maybe I won't

Randall Munroe(former NASA roboticist) posted yet another weird XKCD comic today which doesn't make much sense unless you get the references he's trying to make.

He's using titles of books by Judy Blume (born Judith Sussman on February 12, 1938), an American writer of teenage/kids books.

Some of Judy's books were :

These were the books he referenced in the webcomic.
Apparently, Judy Blume is ready with her first adult book called, "In the unlikely event"

Judy Blume's first book was The One in the Middle Is the Green Kangaroo, in 1969

The Guardian gives a glowing review to "In the unlikely Event"
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