Harish Ramaswamy

@ChennaiTraffic @CMDA_Official The stretch of Velachery main road opposite J7 police station has become an old vehicle dumpyard. I counted 12 such vehicles today. Please remove them. It causes obstruction to pedestrians and makes it unsafe.

@walkingindia @straphanger_in : I am planning on creating a dataset where we identify 100 (say) points of interest in Chennai, and completely analyse all the 100*100 source-destination trips-- trip time, walking convenience, transit etc. Would you be interested in helping out?

Perplexity Pro answer: perplexity.ai/search/what-if…

I am disappointed with these reasoning model LLMs. They seem painfully horribly bad, and are useless unless you know the answer already. Deepseek R1 answer: perplexity.ai/search/what-if…

@francoisfleuret Sample words from model. Create a bigram word count matrix of size V times V. Return the row having smallest sum and highest sparsity.

If you have an autoregressive model, how would you sample x such that P(X=x) is small but H(Y|X=x) is small too?

@UpdatesChennai But after spending (say) 1 lakh crore and 20 years time, will folks really spend 1 to 2 hours extra just to reach the airport? Might be better to give up on air supremacy and spend the time, money and political will on something like an extra 100kms of metro.

To all who say expand current Chennai airport. First 🔸You need so much of land to acquire especially OTA Land which will be very difficult to acquire 🔸Even if we acquire it will be barely of any use. Airport needs a parallel runway to cater to growing needs & you can’t build it there given its near a hill 🔸Chennai needs land for airside expansion and we don’t have land for it especially along GST Road 🔸Secondary runway itself isn’t of much use as it’s not parallel & doesn’t allow simultaneous use of both runways #Chennai #Parandur ✈️

@pretentiouswhat I dunno why you read so much into that tweet. Literally he just says things that China considers impressive are concrete, while things that Japan/Korea consider impressive are people. I dunno if that is true. But that is all Noah's tweet says. Nothing about which city has which.

This is so funny. What point does he think he's making here? Is his hypothesis that China panoramas focus on impressive skyscrapers and infrastructure because the streets lack shoppers or electric signs? lmao

@CumtaOfficial Survey done. The questions clearly indicate you are aware of the issues. I hope you will make progress in solving them. All the best.

Let's create a sustainable & affordable transportation for Chennai🙌 Take the citizen survey & voice your views and opinions on Chennai's transportation for the next 25 years. cumta.tn.gov.in/cmpsurvey/👈 How CMP can change mobility in Chennai? ✓ Reduce travel time and cost (1/4)

@CumtaOfficial Please upgrade your website security/certificates. My browser gives warnings when I click the link and says it could be an attack and "Your connection is not private".

Digital Chennai, G.O. was issued on the same. Visit this link to know in detail cumta.tn.gov.in/#/tenders/ongo… . . #DigitalChennai #SmartCityChennai #DigitalTransformation #ConnectivityForAll #ChennaiDigitalHub #TechSavvyCity #FutureReadyChennai #EChennai #DigitalEmpowerment (2/2)

In line with the announcement made by Hon’ble Minister of Housing and Urban Development Department, Thiru. S. Muthusamy at the TN assembly 2023-24, to Integrate Urban Data Platform and Urban Project Planning and Management solutions in Chennai Metropolitan Area(CMA) - (1/2)

@CumtaOfficial Already done. I had also suggested a more useful survey, where you ask each person 4 places within Chennai that are important to them (e.g home, workplace, school, other workplace). With those locations, build transit so that all trips are quick, safe and comfortable.

@Harish_GPR Great! Your suggestion has been duly noted. Would be nice if you can take the citizen survey and share more inputs in the survey. cumta.tn.gov.in/cmpsurvey/

Which of the below transport improvement is your top priority to reduce congestion in Chennai?

@ChennaiTraffic @R_Sudhakar_Ips 2 questions: How do you enforce this? What is a residential area? e.g. is Velachery main road from Vijayanagar bus stand to Guru Nanak college residential? Multiple apartment complexes on this road. If yes, then excellent. Too much rash driving.

Speed limit in Chennai City limits From 04.11.2023 Light Motor Vehicles : 60 Kmph 🚘🚙🏎️ Heavy Motor Vehicles: 50 Kmph 🚍🚛 Two Wheelers: 50 Kmph 🏍️🛵 Auto-rickshaws: 40 Kmph 🛺🛺🛺 All vehicle types in residential area: 30 Kmph #Chennai #Traffic #SafetyFirst @R_Sudhakar_Ips

@UpdatesChennai A Chromepet-Thoraipakkam Metro line would be amazing for this, far more valuable than a Siruseri-Vandalur line. But we have "considered" the latter and ignored the former.

Close up of the Int’l Radial Tech Park opened today. Looks amazing close by. Total project consists of 4 blocks offering a total of 4.6 million sq.ft office space with employment for 50,000+ people.#Chennai #OfficeSpace🏗️🌇

@CumtaOfficial 👍.Please do another survey which just asks 4 city locations important to them and family. A father in a typical family of 4 might put his workplace, wife's workplace, kid's school and home. Design CMP so that 1 hour walk/transit is possible for most pairs of locations there.

🌇🚍 Our vibrant Chennai deserves a seamless & sustainable TRANSPORTATION future! 🚆🌳 We need YOUR input to shape the city's mobility plan. 📢 Take the Citizen Survey today and be a part of the change! 📋💬 cumta.tn.gov.in/cmpsurvey/ 👈 #transportforchennai

@ChennaiTraffic I beg you please to make bus bays, with extra space away from the lanes, a reality in Velachery main road/Guru Nanak salai. 2 lane roads with bus routes are horrible when 2 buses stop simultaneously on both lanes.

Bus Bay! Effort of GCTP for a safer and effective traffic management! #BusBay #Chennai #Traffic

@UpdatesChennai Way forward is MTC to mostly be for short (<5km) trips, and integrating suburban rail tightly with Metro. But they (MTC/suburban) will not do it because that will feel like a loss of power. Metro needs about 20 lakh daily ridership (about 15k per station will do) to force them.

Chennai Metro Rail records a nearly 25% surge in ridership in last six months.. #Chennai #Metro Ⓜ️🚇 thehindu.com/news/cities/ch…

@CumtaOfficial The MTC should be completely reoriented around the metro/suburban/mrts. Their main purpose should be to move people to and from their bus stops to the nearest railway stn. You can double the number of bus trips for same buses by shortening routes.

Do you use public transport like Bus/Metro/Train for your work in Chennai?

@MountainOfMoon Haha. I saw a similar travesty in IJCAI as a reviewer. The paper minimised a lagrangian w.r.t. BOTH x and lambda using gradient descent. NO other reviewer caught it. What's the value of reviews when such basic errors are not caught? (or when the reviewer is unaware of basic PAC?)

ML Reviewer does not know PAC learning.

@scienceisstrat1 Why is there such a huge discrepancy between the tweet a couple days ago titled "a renewable revolution" where battery sales for 2023 was merely 40GWh? Here it is more than 3000GWh.

The US 🇺🇸 and Europe 🇪🇺 are getting in the game in terms of battery manufacturing 🔋 But China 🇨🇳 is also surging forward 📈

@gowerrobert If you really care the same for a loss reduction of 2 to 1 as you do about the loss reduction from 0.02 to 0.01 then this is absolutely the right thing to do.

Question for optimizers. When minimizing a positive function f(x), we can min the logarithm of f(x) instead. Applying gradient descent gives a scale invariant method. Do we have a name for this? We could apply a mirror descent method instead, but I like this for its invariance.