Search found 192 matches

by chilarai
28 Mar 2022 13:36
Forum: Science, Economics & Technology Forum
Topic: Physics Discussion Thread
Replies: 2917
Views: 4070538

Re: Physics Discussion Thread

About cool blackboard writings At my engineering madrassa, the physics professor would come with a big box of coloured chalks and for the 2 waves showing constructive and destructive interference . he would draw with two different colours and with BOTH hands at the same time and it would be construc...
by chilarai
16 Jun 2020 20:47
Forum: Science, Economics & Technology Forum
Topic: BR Maths Corner-1
Replies: 2237
Views: 414687

Re: BR Maths Corner-1

We need x(x+1)(2x+1) to be divisible by 6. x(x+1)(2x+1) is always divisible by 6 isn't it since the quotient is equal to 1^2 + 2^2 ...x^2 or am i missing something obvious only thing i get is 3y(y+1)/ x(x+1) = 2x+1 i.e a whole number . so looks like if y(y+1) is divisible by x(x+1) then that is one...
by chilarai
01 Mar 2019 23:08
Forum: Military Issues & History Forum
Topic: Operation Balakot: News & Discussion
Replies: 5107
Views: 1370623

Re: Operation Balakot: News & Discussion

Nag ?

Added later : those snakes referred above are Nag ATGMs ?
by chilarai
27 Feb 2019 03:33
Forum: Military Issues Archive
Topic: Indian Forces Strikes Pakistan Terrorist Camps
Replies: 2210
Views: 385632

Re: Indian Forces Strikes Pakistan Terrorist Camps

https://twitter.com/ZaidZamanHamid/status/1100478748116299788 ---> I am in contact with PAF pilots who are full of passion & rage to attack the Indians...but the rules of engagement is holding them back...many times they lock their missiles on to Indian jets & then lock off...both sides are...
by chilarai
26 Feb 2019 16:18
Forum: Military Issues Archive
Topic: Indian Forces Strikes Pakistan Terrorist Camps
Replies: 2210
Views: 385632

Re: Indian Air Forces Strikes Pakistan along with Ground Assault

if only we had done the same 20-30 years back when these "miltancy/insurgency/hardlining/gunmency" started .

but better late than never !!
by chilarai
13 Aug 2018 16:31
Forum: Strategy, Politics & International Relations Forum
Topic: Indo-UK News & Discussions- June 2017
Replies: 5579
Views: 1518874

Re: Indo-UK News & Discussions- June 2017

^The only way this can be countered is when MEA really gets strong on visitors/business and companies with persons from fUK. Anybody with fUK citizenship and not having an OCI should have to go through the following: ... 3. All visitors from fUK should be made to see videos and compilations of bris...
by chilarai
16 Dec 2017 02:35
Forum: Trash Can Archive
Topic: Terroristan - 29 September 2017
Replies: 2847
Views: 599434

Re: Terroristan - 29 September 2017

Sign Of Further Chinification Of Pakiland Chinese Doctors to Conduct 500 Free Eye Surgeries in Pakistan Next Month CPEC covered :roll: Pakistanis should be careful. Chinese doctors might try to do population control in the guise of eye operations. The eye drops they use are specially dangerous :twi...
by chilarai
28 Jun 2017 18:07
Forum: Trash Can Archive
Topic: Indian Space Program: News & Discussion - Sept 2016
Replies: 4447
Views: 1487820

Re: Indian Space Programme Discussion - Sept 2016

Gagan wrote:Must watch

https://youtu.be/eCt6irXX970
early in the video Dr Sarabhai says
"in my opinion the aspect of space research which I would like to stress most is in relation to national capability and the self confidence this will generate "
amazing foresight and vision !
by chilarai
18 Jun 2017 23:33
Forum: Trash Can Archive
Topic: Indian Space Program: News & Discussion - Sept 2016
Replies: 4447
Views: 1487820

Re: Indian Space Programme Discussion - Sept 2016

Regarding the atomic clocks failing , if we have multiple clocks for redundancy shouldn't they be from different sources or companies ?
by chilarai
05 Jun 2017 17:51
Forum: Trash Can Archive
Topic: GSLV-Mk III launch program/post-launch analysis
Replies: 424
Views: 115864

Re: GSLV-Mk III launch program/post-launch analysis

Congratulations !!

Never before i have seen a wikipedia page updated so fast :)
D1 5 June 2017
17:28 IST / 11:58 UTC Mk III Second India GSAT-19 3,136 kg Success
by chilarai
31 May 2017 23:16
Forum: Strategy, Politics & International Relations Forum
Topic: Internal Security Watch
Replies: 6203
Views: 1665576

Re: Internal Security Watch

'Terrorists in Kashmir will not live to see this winter' Army vows to wipe out militancy http://indiatoday.intoday.in/story/kashmir-pakistan-militants-terrorists-indian-army-hizbul-mujahideen/1/964863.html already hizbul #1 is starting to resemble taliban #3 :rotfl: just need to keep the pressure u...
by chilarai
08 May 2017 19:27
Forum: Strategy, Politics & International Relations Forum
Topic: Indo-Israel: News and Discussion
Replies: 2559
Views: 458130

Re: Indo-Israel: News and Discussion

My colleague from Singapore once flew Singapore -> Istanbul -> tel aviv for business

( I have seen el al planes at bangkok airport too )
by chilarai
15 Jan 2017 18:13
Forum: Science, Economics & Technology Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 4767
Views: 1451331

Re: Indian Railways Thread (Dec 2015)

viveks wrote:I don't like the automatic doors concept. What about people who want to smoke? Or simply stand by the door and enjoy the views during the ghat, etc.
smoking I think is not allowed on Indian railways anymore. I have seen RPF catching smokers near the toilet .
by chilarai
31 Dec 2016 13:53
Forum: Science, Economics & Technology Forum
Topic: Currency Demonetisation and Future course of Indian Economy
Replies: 7884
Views: 1406703

Re: Currency Demonetisation and Future course of Indian Economy

I had to link it to my geemail acct that is reserved for mobilephone. Gave so-so correct naam, bogus DOB (none of their *** business). But it is a bogus DOB that I have used on many other web portals, so I am sure to remember it. First lesson in Internet/faceBook security: Given them bogus data but...
by chilarai
07 Oct 2016 14:03
Forum: Strategy, Politics & International Relations Forum
Topic: Internal Security Watch
Replies: 6203
Views: 1665576

Re: Internal Security Watch

http://www.hindustantimes.com/india-news/indian-who-worked-for-is-in-iraq-held-in-kochi-collecting-explosives/story-39wc8mmhTFHUNsNV14WqBP.html Subhani Haja Moideen, hailing from Idukki in Kerala, has not been able to resist the lure of jihad. Moideen crossed back to Istanbul, and after contacting ...
by chilarai
16 Sep 2016 12:38
Forum: Science, Economics & Technology Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 4767
Views: 1451331

Re: Indian Railways Thread (Dec 2015)

Yes there are two routes one via Rangia and another via Goalpara. The latter being the more recent one. The one via Rangia is what took me more than 5.5 hrs last year.
by chilarai
16 Sep 2016 10:51
Forum: Science, Economics & Technology Forum
Topic: BR Maths Corner-1
Replies: 2237
Views: 414687

Re: BR Maths Corner-1

Thanks.Indeed I left out an 'a' like I always did in my exams. Will correct when I check brf on bigger screen.
by chilarai
16 Sep 2016 03:42
Forum: Science, Economics & Technology Forum
Topic: BR Maths Corner-1
Replies: 2237
Views: 414687

Re: BR Maths Corner-1

JayS wrote:
Another factor is (5^397 - 1) i guess. If we factorize your factor it must be giving one more required factor.
5^397 -1 should be divisible by 4 ...but that is definitely smaller than 10^60 ..hence i was not sure
by chilarai
16 Sep 2016 02:41
Forum: Science, Economics & Technology Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 4767
Views: 1451331

Re: Indian Railways Thread (Dec 2015)

Gohain announced that doubling of railway tracks from Bongaigaon to Guwahati via Goalpara and Digaru to Hojai would start in October and it would be his endeavour to invite Railway Minister Suresh Prabhu for the foundation stone laying ceremony of those projects. He said that these projects are exp...
by chilarai
16 Sep 2016 00:42
Forum: Science, Economics & Technology Forum
Topic: BR Maths Corner-1
Replies: 2237
Views: 414687

Re: BR Maths Corner-1

x-post from another brf thread .. Problem: Factor the number (5^1985-1) into product of three integers, each of which is greater than 10^60. (Hint: No calculators or computers are expected to solve this) is one of the factor a^4 + a^3 + a^2 +a + 1 where a = 5^397 ? though even then I don't have the...
by chilarai
26 Aug 2016 16:40
Forum: Military Issues & History Forum
Topic: Newbie Corner & Military Miscellaneous - Aug 2016
Replies: 221
Views: 124188

Re: Newbie Corner & Military Miscellaneous - Aug 2016

very nice description of fighter lock on and how it looks like in the fire control radar display ( with images )

https://www.quora.com/How-does-a-fighte ... m-Morgan-5
by chilarai
23 Jun 2016 13:57
Forum: Trash Can Archive
Topic: Indian Space Programme Discussion
Replies: 3934
Views: 644662

Re: Indian Space Programme Discussion

There is a video of satellite separating from the soyuz http://www.esa.int/spaceinvideos/Videos/2014/04/Onboard_cameras_show_full_launch_and_separation_of_Sentinel-1A can see the satellite separating at around 3:50 min but does not show the mechanism ( maybe it is some kind of secret ??) no explosiv...
by chilarai
23 Jun 2016 00:06
Forum: Trash Can Archive
Topic: Indian Space Programme Discussion
Replies: 3934
Views: 644662

Re: Indian Space Programme Discussion

The PE in the spring kicks out the sats., note that in a free fall, the mass is zero and hence 'mv = MV' equation does not apply. That is there is no reaction. [/quote] maybe i did not pay much attention in school .. but i would think mass is not zero , the weight is zero ( probably ) hence weightl...
by chilarai
24 Jan 2016 08:21
Forum: Trash Can Archive
Topic: LCA Tejas: News and Discussions
Replies: 4035
Views: 685544

Re: LCA Tejas: News and Discussions

it would help if there is a picture which has a building or a pole also in it to approximate the true vertical ..now we also have to assume that the cameraman is holding the camera upright and not rolling it somehow to get a better view of the plane in his frame , though i think in a video grab the ...
by chilarai
24 Jan 2016 02:23
Forum: Trash Can Archive
Topic: LCA Tejas: News and Discussions
Replies: 4035
Views: 685544

Re: LCA Tejas: News and Discussions

If the observer is directly below you can probably have a better approximation of the angle of attack , the aspect ratio ( wing tip to wing tip vs head to tail ) of the pic would change with the angle of attack and should be fairly accurate IMO. Could you explain that please? I was wrong I assumed ...
by chilarai
23 Jan 2016 19:09
Forum: Trash Can Archive
Topic: LCA Tejas: News and Discussions
Replies: 4035
Views: 685544

Re: LCA Tejas: News and Discussions

If the observer is directly below the aircraft no angle would be seen - only a straight line. If the observer is directly below you can probably have a better approximation of the angle of attack , the aspect ratio ( wing tip to wing tip vs head to tail ) of the pic would change with the angle of a...
by chilarai
24 Sep 2015 17:49
Forum: Strategy, Politics & International Relations Forum
Topic: Indian Foreign Policy
Replies: 2499
Views: 515345

Re: Indian Foreign Policy

He was excellent with regular updates on twitter during evacuation of Indians( in Yemen I think ) as well, where i am sure he was going beyond the call of duty ! Of course his no nonsense style is very impressive.
by chilarai
17 Sep 2015 22:52
Forum: Science, Economics & Technology Forum
Topic: BR Algorithms Corner
Replies: 167
Views: 24174

Re: BR Algorithms Corner

BTW the above is one example where a pseudo random number generator is just as good as a true random number generator.
by chilarai
11 Sep 2015 17:48
Forum: Science, Economics & Technology Forum
Topic: BR Algorithms Corner
Replies: 167
Views: 24174

Re: BR Algorithms Corner

so finally got some time for coding . With the equations derived earlier and using shift operations instead of integer multiplications by 2 , now I can search up to 1,000,000 in less than 8 minutes . the code is import Data.Bits import Control.Monad limit = 1000000 powerlimit = ceiling $ logBase 2 (...
by chilarai
28 Aug 2015 12:08
Forum: Science, Economics & Technology Forum
Topic: BR Algorithms Corner
Replies: 167
Views: 24174

Re: BR Algorithms Corner

Thanks Amber G, yeah that helps. would be implementing it sometime. My aim to write the program was to see if i can find any patterns to the solutions and then try prove a generic solution by going backwards. But that does not seem likely with only the few ( and likely they are the only ) solutions ...
by chilarai
27 Aug 2015 16:56
Forum: Trash Can Archive
Topic: Indian Space Programme Discussion
Replies: 3934
Views: 644662

Re: Indian Space Programme Discussion

Neat. Loved the SDREness of the whole thing !
by chilarai
08 Aug 2015 16:43
Forum: Science, Economics & Technology Forum
Topic: BR Maths Corner-1
Replies: 2237
Views: 414687

Re: BR Maths Corner-1

==> The fastest way to compute (which computers use) is repeated squaring, not unlike method shown by Chilarai but this reduces the number of operation to about the order of log_2(n) instead of (n).. (That is if one wants to find, say f(10000000000) the above method needs about 10000000000 steps, r...
by chilarai
07 Aug 2015 12:19
Forum: Science, Economics & Technology Forum
Topic: BR Maths Corner-1
Replies: 2237
Views: 414687

Re: BR Maths Corner-1

since A and B both are irrational , it will obviously be pain da butt to manually expand (a+b)^ 7 I probably did it in a longer than required method. is the answer 61/8 ? a+b = 1 and a^2 + b^2 = 2 => ab = -1/2 then i calculated (a^2 + b^2)^2 = 2^2 = 4 ...=> simplifying => ..to finally get a^4 + b^4...
by chilarai
03 Aug 2015 12:27
Forum: Science, Economics & Technology Forum
Topic: Civil Aviation Development & Discussion
Replies: 6030
Views: 1224654

Re: Civil Aviation Development & Discussion

^^ happened in singapore often. Mostly the culprits were PRC national. I anyway always keep my passport at least on my person no matter how uncomfortable it is tohave passport in pocket sitting in a cramped seat ! http://travel.asiaone.com/article/news/theft-on-planes-8-chinese-nationals-get-stiff-j...
by chilarai
28 Jun 2015 12:20
Forum: Science, Economics & Technology Forum
Topic: Perspectives on the global economic changes
Replies: 4318
Views: 624274

Re: Perspectives on the global economic changes

Chilarai saar, Its good that you do your own due diligence. Most neither have the time nor the understanding to do the same. They outsource this to their fund manager or financial advisor. I wrote a post sometime back . http://forums.bharat-rakshak.com/viewtopic.php?p=1839022#p1839022 Can you criti...
by chilarai
27 Jun 2015 13:08
Forum: Science, Economics & Technology Forum
Topic: Perspectives on the global economic changes
Replies: 4318
Views: 624274

Re: Perspectives on the global economic changes

Based on your risk profile you can either invest in safe and stable instruments( relatively speaking , there is always the risk of losing all your money) or one with higher risk ( but with possibility of higher returns) Who determines if a particular product or investment idea is risky or not? Cred...
by chilarai
27 Jun 2015 12:05
Forum: Science, Economics & Technology Forum
Topic: Perspectives on the global economic changes
Replies: 4318
Views: 624274

Re: Perspectives on the global economic changes

Why should I risk my earnings? As you said - you have to put it to work earning interest or some other income producing idea. It takes extreme courage in today's era to live within your means. Many people are incapable or they just do not have the courage to accept that not everything is affordable...
by chilarai
08 Jun 2015 17:59
Forum: Trash Can Archive
Topic: Indian Railways Thread
Replies: 3937
Views: 698339

Re: Indian Railways Thread

Chain pulling to be thing of past . Those chains are being removed. About time I would say , would have been better to have it with civilized passengers for use in real emergencies but then with the kind of people around leaves railway with no choice. http://timesofindia.indiatimes.com/city/bareilly...