Search found 798 matches

by vsunder
09 Aug 2020 04:34
Forum: Technology & Economic Forum
Topic: BR Maths Corner-1
Replies: 1980
Views: 157744

Re: BR Maths Corner-1

This paper posted on Arxiv on Monday solves a 30 year old problem on the nodal sets of eigenfunctions. https://arxiv.org/pdf/2008.00677.pdf A nodal set is the set where the eigenfunction is not zero. A cheap summary of the result is Nodal sets cannot be thin and narrow. A first version of this resul...
by vsunder
09 Aug 2020 03:59
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 3824
Views: 697416

Re: Indian Railways Thread (Dec 2015)

^^^^Pre Covid Railway Board had issued guidelines to all zones to prepare all routes along the GQ for 130 kmph speeds by Feb 2021. This entails COCR runs by RDSO and then submitting data collected on COCR runs to the certification authorities like the zonal CRS. I doubt this can be achieved though c...
by vsunder
08 Aug 2020 08:24
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 3824
Views: 697416

Re: Indian Railways Thread (Dec 2015)

It is pertinent you asked this question today as IR with great fanfare sent off its first train (Kisan rail) today with just fruits and vegetables, flowers and other perishables from Deolali(Nashik dist) to Danapur, Bihar. Deolali as you know has the IA arty school and in British times had a mental ...
by vsunder
08 Aug 2020 03:45
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 3824
Views: 697416

Re: Indian Railways Thread (Dec 2015)

Traffic on the Konkan Railway has come to a halt due to a serious cave in inside the Pernem tunnel. 6 of the many tunnels on the Konkan railway have a long history of cave ins due to a high water table and poor stability and varying strata overlaying laterite. Pernem tunnel, Old Goa tunnel and other...
by vsunder
05 Aug 2020 17:42
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 3824
Views: 697416

Re: Indian Railways Thread (Dec 2015)

HSR will come when it comes. But for the here and now: CRS has approved and issued a certificate for raising the sectional speed between GZB and DDU to 130 kmph that is between Ghaziabad to Mughalsarai. Principally this has been achieved by track and sleeper renewal and replacement and the installat...
by vsunder
03 Aug 2020 19:27
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 3824
Views: 697416

Re: Indian Railways Thread (Dec 2015)

Seriously @ANandy you should know better than quoting news from a mouthpiece of the Catholic diocese of Mangalore----Daijiworld, that is known to be so virulently anti--Modi that they will spread any canard----bungee jumping off the Chenab bridge, next khemta dancing on semi HSR to Howrah. I should ...
by vsunder
03 Aug 2020 07:11
Forum: Technology & Economic Forum
Topic: Indian Roads Thread
Replies: 3063
Views: 361513

Re: Indian Roads Thread

Yes 8 lane expandable to 12, with two caveats.

1. Highway goes through some wild life preserves where there are underpasses for animals. Possibly there it may be 6 lanes.

2. LA in MH is always an issue with Kaka and UT.
by vsunder
03 Aug 2020 03:23
Forum: Technology & Economic Forum
Topic: Indian Roads Thread
Replies: 3063
Views: 361513

Re: Indian Roads Thread

Mumbai Delhi expressway Drone shots by NHAI in Gujarat section https://www.youtube.com/watch?v=i4bSCL-IQq8 Vadodara to Mumbai will be concrete. There are videos of the technical details of the concrete being poured on to this highway and the curing process. The scratch marks on concrete have to be 3...
by vsunder
03 Aug 2020 01:04
Forum: Technology & Economic Forum
Topic: Indian Roads Thread
Replies: 3063
Views: 361513

Re: Indian Roads Thread

Yet another important bridge being built by L&T in Bihar. Out of many being built in Bihar, this is the first 6 lane bridge Bihar will see. It is extremely important in connecting North and South Bihar which for the main relies on ferries across Ganga which is limited or bridges that are few and...
by vsunder
03 Aug 2020 00:22
Forum: Technology & Economic Forum
Topic: Indian Roads Thread
Replies: 3063
Views: 361513

Re: Indian Roads Thread

2 lanes of the Mahatma Gandhi Setu connecting Patna and Hajiipur across Ganga was inaugurated by remote videoconferencing on Friday by Union minister N. Gadkari. The original bridge built by Gammon India and inaugurated in 1982 by Indira Gandhi fell soon into disrepair due to poor design, faulty mat...
by vsunder
31 Jul 2020 05:32
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 3824
Views: 697416

Re: Indian Railways Thread (Dec 2015)

@Avik: You mention an IR color. You might want to take a look at the locos India has gifted to BD. The locos from Howrah shed and Samastipur shed are deep blue, while the locos given from the holdings of Vizag shed are cream and orange. So what exactly do you mean by IR colors?? Any person with even...
by vsunder
30 Jul 2020 23:50
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 3824
Views: 697416

Re: Indian Railways Thread (Dec 2015)

Railfans Iraqua Akhtar and Ammar Rizvi have been doggedly and diligently pursuing the Satpura narrow gauge gauge conversion project. In my opinion this is a major project of IR. IR also considers it very important as it not only gauge converted but electrified the tracks simultaneously. The tracks l...
by vsunder
30 Jul 2020 23:14
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 3824
Views: 697416

Re: Indian Railways Thread (Dec 2015)

Historic day today. Engine trial from New Palanpur(Gujarat) to Daurai (Ajmer, Rajasthan) 343 km on the WDFC. Since commercial freight has started between Ajmer and Rewari, in about 7 months I anticipate that commercial traffic will start between Rewari and New Palanpur. New Palanpur(recall all DFC s...
by vsunder
24 Jul 2020 23:16
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 3824
Views: 697416

Re: Indian Railways Thread (Dec 2015)

Final blast on WDFC tunnel 1 km at Sohna in Haryana, between Faridabad and Rewari under Arravalli hill. Jubilant workers celebrate at completion of the tunnel. Happened today. This is a double line tunnel which will also enable movement of double stacked container traffic with electrified tracks bet...
by vsunder
22 Jul 2020 02:56
Forum: Military Issues & History Forum
Topic: India's Border Security with China and Pakistan-2020
Replies: 8042
Views: 966231

Re: India's Border Security with China and Pakistan-2020

Z Morh Tunnel: 6.5 km tunnel between Srinagar and Kargil. IL&FS got the tender and that became a debacle. Re-tendered and awarded to Apco, Jan 2020. First blast for making the tunnel yesterday. Completion date 2021. https://en.wikipedia.org/wiki/Z-Morh_Tunnel Driving time to Leh will be lessened...
by vsunder
21 Jul 2020 01:20
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 3824
Views: 697416

Re: Indian Railways Thread (Dec 2015)

Thank you sir, this is very useful. So will the line follow the Teesta river valley? Looks difficult requiring a lot of tunnels.. [Added l8r] Per wiki , it will have 28 bridges and 14 tunnels, within 45km. Apparently, 38 out of these 45 km will be inside tunnels! But it does not make sense - 28 bri...
by vsunder
19 Jul 2020 23:05
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 3824
Views: 697416

Re: Indian Railways Thread (Dec 2015)

Both the lines ^^^ the metre gauge one from Pathankot to Jogindernagar and the Nangal Dam--_Bhanupalli--Amb Andaura line from where the Bilaspur---Manali---Leh line branches off at Bhanupali are heavily frequented by pilgrims visiting two important shakti peethas in close proximity in HP. Jwalamukhi...
by vsunder
19 Jul 2020 07:24
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 3824
Views: 697416

Re: Indian Railways Thread (Dec 2015)

In the statement by the chairman of the railway board, he mentions 2025 as the deadline for the line up to Bilaspur. He then states that sanction has not been given for the line beyond that point. Regarding this line, I am hoping that at least the line from Bilaspur gets extended to Mandi and then ...
by vsunder
19 Jul 2020 02:39
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 3824
Views: 697416

Re: Indian Railways Thread (Dec 2015)

The time lines offered is too optimistic. As chairman Railway board acknowledges LA has not been done beyond Bilaspur and even to Bilaspur it is not complete. But work is indeed going on between Bhanupali and Bilaspur 43km. The lines that have a good chance of making the deadline is the line in Mizo...
by vsunder
19 Jul 2020 02:28
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 3824
Views: 697416

Re: Indian Railways Thread (Dec 2015)

A very detailed presentation with slides of the ongoing projects in the Northeast by chairman railway board V. K. Yadav. The presentation also offers capex pumped in comparisons over the years to projects in the northeast and also offers a deadline for each individual project. @ Arshyam Rangpo-Sivok...
by vsunder
16 Jul 2020 21:47
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 3824
Views: 697416

Re: Indian Railways Thread (Dec 2015)

There is a curious story about IR. About 100 years ago a forerunner of IR re-gauged 141 km of track from Meter Gauge to Broad Gauge in just 5 hours. Strange but true and I am not suffering from delusion. This happened on the Erode to Trichinopoly section in 1929. Originally the line was built by Car...
by vsunder
15 Jul 2020 22:06
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 3824
Views: 697416

Re: Indian Railways Thread (Dec 2015)

The purpose of ballast is manifold. It provides drainage and prevents the growth of vegetation along the track. It damps out vibrations and prevents lateral movement of the track. For semi high speed traffic it is recommended that a ballast layer of 300mm+ be applied and there should be at least a s...
by vsunder
15 Jul 2020 19:56
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 3824
Views: 697416

Re: Indian Railways Thread (Dec 2015)

An interview with DRM Guntakal Alok Tiwari, focusing on the measures taken by Guntakal division over the 560km Tkms to increase the speed to 130kmph over its jurisdiction on the Chennai-Mumbai route. CRS has conducted a trial in the last days running 24 coach rakes and conducting oscillation measure...
by vsunder
15 Jul 2020 03:27
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 3824
Views: 697416

Re: Indian Railways Thread (Dec 2015)

Gooty yard of SCR has been re-modeled and has a new electronic interlocking system with added safety. This is an extremely busy yard with traffic to Bangalore, Chennai, Mumbai and Hyderabad. With this legacy interlocking systems remain at Secunderabad, Kazipet, and Vijayawada among the major station...
by vsunder
14 Jul 2020 03:08
Forum: Technology & Economic Forum
Topic: Indian Roads Thread
Replies: 3063
Views: 361513

Re: Indian Roads Thread

The Se La tunnel bypassing Se La pass at 13,700 feet is an important strategic tunnel which will connect Tawang with the rest of India. The tunnel will allow all weather and all year access to Tawang, the scene of fierce battles in 1962. Currently Tawang remains cut-off during the winters. To bypass...
by vsunder
13 Jul 2020 00:59
Forum: Technology & Economic Forum
Topic: Indian Economy News & Discussion - Nov 27 2017
Replies: 5576
Views: 1183073

Re: Indian Economy News & Discussion - Nov 27 2017

After I posted I went to check all the bone china that I have preserved from 70 years ago. There are the demitasse Wedgewood bone china cups and also yes Hitkari potteries. Two individuals came to India as a result of the horrors of the Partition. They started a cycle factory in a garage but that di...
by vsunder
12 Jul 2020 23:18
Forum: Technology & Economic Forum
Topic: Indian Economy News & Discussion - Nov 27 2017
Replies: 5576
Views: 1183073

Re: Indian Economy News & Discussion - Nov 27 2017

https://www.youtube.com/watch?v=M-urjOFKin8 Abhijeet Iyer-Mitra on the Indian economy. Starting at 1:42, he makes some scathing remarks about the Indian IT industry. And at 17:42, he goes into the Indian ceramic industry, says that India has no ceramic industry right now worth mentioning- it's domi...
by vsunder
09 Jul 2020 22:48
Forum: Technology & Economic Forum
Topic: Indian Economy News & Discussion - Nov 27 2017
Replies: 5576
Views: 1183073

Re: Indian Economy News & Discussion - Nov 27 2017

This should really go in the Railway thread but since someone commented above. The new privately run trains initiative of 151 trains is over and above the current trains. This will lead to serious track congestion, esp. in the trains between Bangalore and North which runs on single line section for ...
by vsunder
07 Jul 2020 23:08
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 3824
Views: 697416

Re: Indian Railways Thread (Dec 2015)

This is a thoughtful article by Philip Zerillo on how V. K. Yadav during his tenure as GM of South Central Railways (SCR) introduced many reforms that transformed that railway zone. Arguably it is the one of the best run railway zones in IR. Zones like CR are simply pathetic with poor resources util...
by vsunder
06 Jul 2020 02:48
Forum: Technology & Economic Forum
Topic: Indian Roads Thread
Replies: 3063
Views: 361513

Re: Indian Roads Thread

Picture of two landmark projects in India in one photo frame. Delhi-Mumbai expressway under construction a greenfield project jumping over an under construction Western Dedicated Freight corridor WDFC https://twitter.com/sahil11p/status/1279619711177637889/photo/3 https://twitter.com/sahil11p/status...
by vsunder
05 Jul 2020 17:50
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 3824
Views: 697416

Re: Indian Railways Thread (Dec 2015)

Phase I of the Nadikudi to Sri Kalahasti Line commissioned by SCR This new line is 308 km long. https://en.wikipedia.org/wiki/Nadikudi%E2%80%93Srikalahasti_section It is being built for multiple reasons. (a) It runs in the interior of Rayalseema and provides an alternate route between Chennai and H...
by vsunder
05 Jul 2020 04:05
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 3824
Views: 697416

Re: Indian Railways Thread (Dec 2015)

The first station on the new Rishikesh to Karnaprayag railway line is ready but commissioning was delayed due to the virus. This station at Rishikesh is called Yog Nagari station and is the start of the line climbing up into the Himalayas. Right next to the station is the first major bridge the line...
by vsunder
04 Jul 2020 08:27
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 3824
Views: 697416

Re: Indian Railways Thread (Dec 2015)

Latest videos from Habibganj shows that work has resumed after the lockdown. They have started putting a roof onto the facade. The skeleton of the facade was in place in Jan this year when I went past the station. Here is the state of the station a few days ago: https://www.youtube.com/watch?v=n1Qbo...
by vsunder
04 Jul 2020 08:24
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 3824
Views: 697416

Re: Indian Railways Thread (Dec 2015)

deleted double post
by vsunder
04 Jul 2020 03:38
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 3824
Views: 697416

Re: Indian Railways Thread (Dec 2015)

Third coaching terminal at Byapanahalli is "partially" commissioned. The tentative code is TCTB. It will be the third station for Bangalore along with current ones Yeshwantpur and Bangalore City. Trains to Chennai and Mumbai will originate at TCTB and also the 12 pairs of trains which are ...
by vsunder
02 Jul 2020 19:37
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 3824
Views: 697416

Re: Indian Railways Thread (Dec 2015)

^^^ It is very important that specialized steel of the type above have low Hydrogen diffused in the steel, less parts per million of hydrogen. Hydrogen will diffuse through steel in the manufacturing process and through cathodic protection which is a process to prevent corrosion. The hydrogen will c...
by vsunder
01 Jul 2020 23:25
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 3824
Views: 697416

Re: Indian Railways Thread (Dec 2015)

All these are funneled through the narrow neck at the top of Bangladesh with Rangiya at one end and New Jalpaiguri at the other end. What are your thoughts about developing the northern route that runs from NJP via Siliguri Jn - Hasimara and rejoins the mainline at Alipurduar? While closer to the t...
by vsunder
01 Jul 2020 20:26
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 3824
Views: 697416

Re: Indian Railways Thread (Dec 2015)

^^^Thanks. In fact in a bit of foresightedness, IR is doubling and electrifying tracks beyond Guwahati all the way to Lumding. Lumding is important as the track from Agartala joins here and also the tracks from Dibrugarh, Dimapaur and the new tracks to all the state capitals in the NE. So the load w...
by vsunder
30 Jun 2020 23:31
Forum: Technology & Economic Forum
Topic: Indian Railways Thread (Dec 2015)
Replies: 3824
Views: 697416

Re: Indian Railways Thread (Dec 2015)

With CRS yesterday between Satna and Katni for electrification, 90 rkms, the Mumbai-Howrah line via Prayagraj is fully doubled and electrified. This electrifcation had been beset by scandals soon after Modi took over in 2014. The other major project on this line was the second bridge over the Bagra ...
by vsunder
30 Jun 2020 01:28
Forum: Technology & Economic Forum
Topic: Mass Rapid Transit in India
Replies: 1493
Views: 175161

Re: Mass Rapid Transit in India

^^^ What happened to the second line for Lucknow, Vasant Kunj to Charbagh? This is full of narrow lanes and very congested and will be a mess to work and tunnel in with decrepit and very old buildings. Also Varanasi had some ropeway and Metro project, what is the status?

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