Raviteja Chivukula
36 posts
Raviteja Chivukula
@ravitejacr
Co-founder @ Perceptyne Robots | Past: Skyroot Aerospace | National Instruments | IIT Madras
Hyderabad, India Katılım Haziran 2018
91 Takip Edilen41 Takipçiler
just moved from Sf to Bengaluru! where are all the hardware/robotics ppl?
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@moneyordebt @PhysInHistory Actually the exact opposite.
d/dx is the language. It simplifies the expression - 'take a variation of variable y w.r.t another variable x specified at an instance of x'
e^i.pi + 1 = 0 is a tool,a transcendentally elegant one, that helps us in many conclusions.
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@PhysInHistory e^iπ is a language; d/dx is a tool; and math is the language of tools
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Should mathematics be considered a language or a tool? ✍️
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@svembu x.com/i/status/19840…
Sir, what happened to this study? 👇Did you fund one?
Sridhar Vembu@svembu
I will support a study along the lines of Dr Peter Aaby to study the non-specific effects at population scale. We can do this in 2-3 districts. It will help establish if there are non-specific effects such as autism (Dr Aaby primarily studied mortality and he found both positive effects on mortality and negative effects). I would be happy to ask if Dr Prantar Chakrabarty can help lead this. Thank you for your thoughtful response.
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RFK Jr: "Trusting experts is not a feature of science, and it's not a feature of democracy. It's a feature of religion and totalitarianism."
Exactly.
The entire "trust the science" cultists don't get that scepticism of authority and open minded curiosity are the very foundations of science.
As one example: when I was a PhD student, neural networks were thought to be a dead-end, an intellectual backwater. Due to some "renegade" scientists who ignored the consensus and kept working in the field, today neural networks are the foundation of AI.
Based Jessica@RealJessica
Newsweek asked RFK Jr. "why don’t you stop promoting conspiracy theories?" RFK Jr’s reply: "My father told me when I was a little boy that people in authority lie and the job in a democracy is to remain skeptical. I've been science based since I was a kid. Show me the evidence and I'll believe you, but I'm not going to take the word of official narratives." "The way you do research is not by asking authoritative figures what they think. Trusting experts is not a feature of science, and it's not a feature of democracy. It's a feature of religion and totalitarianism."
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@gareebscientist @alpha_defense @lataerospace Easier to develop.
By Hybrid, I think they mean, their architecture is: Fuel cell / Fuel based Generator --> Electric propulsion.
This is significantly easier to develop & put together from COTS components vs. a full-stack bootstrapped jet engine.
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Ok, idk......
Like why are they taking this approach?
Getting a normal aircraft certified itself such a long painfull process and now and completely new hybrid approach?
Is there a write up on why they believe in this approach? It's not obvious, I want to know. Curious @deepigoyal
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LAT Aerospace reveals scale model of India’s first hybrid-electric STOL aircraft.
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@hvgoenka Really?!! These are the easiest bans to get around.
Think about our state if Microprocessors, GPUs, semiconductor chips, special purpose machines, Jet engines, MRI machines are banned. They are hard to get around. Really hard.
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Imagine if Trump bans India from using U.S. tech platforms- no X, Google, Instagram, Facebook or ChatGPT. Frightening, no!
Just think about the consequences seriously and what could be Plan B for us.
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@svembu @DrDatta_AIIMS Why don't you fund a research in that direction sir? It would do lot more good to the society.
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Dr Datta I appreciate your words and courtesy.
By taking the maximalist position "all vaccine shots are good, no one should question any of this" these doctors are not helping the cause. And they ignore the fact that there many doctors who question the dogma.
By its nature, statistical evidence, particularly in an area like medicine with so many confounding variables, is tenuous, and what the doctors who attack me are saying is "we do not know what causes autism, no one knows but we are 100% sure vaccines had nothing to do with it and you are science-illiterate to even suggest that".
Well, when I post links from an accomplished Immunologist on autoimmunity as a possible causal path way, silence. In the US, most leading edge autism medical treatments focus on the autoimmunity pathway by the way. It is a plausible pathway and needs a lot more work to find treatments but shouting down people or suggesting that I should be censored do not help any kind of scientific debate.
Let me come to rural areas. Just yesterday one of my farm workers told me that his 5 year son has autism and he was doing well until they gave him 3 shots in one day when he was 18 months old and he regressed badly. We cannot keep ignoring these as worthless anecdotes.
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This is the news item dated Oct 17 2025 from Bihar. Translation from Hindi (Google Translate):
"Saharsa: 30-35 female students fainted after receiving the HPV vaccine...They were admitted to Sadar Hospital...The District Magistrate declared the situation normal."
Facts:
1. HPV is sexually transmitted. It does not transmit via regular contact or even hugging.
2. We are giving it to very young girls in India.
3. News from Tamil Nadu just 3 days ago: "Tamil Nadu Paves the Way for a Cancer-Free Future With Free HPV Vaccines"
This is NOT a political issue. Please do NOT make this potlicial. Most states in India are doing it and our political leaders across the spectrum have been told that ever more vaccine shots are in the best interest of Indians. I do not blame the politicians because when someone like me can be shouted down so vocally, it would be political suicide for a politician (of any party) to talk about, particularly when the mainstream consensus is so strongly in favor of ever more vaccine shots.
It does not help our business or my "image" to talk about this. Even my friends advise me not to talk about it because they are worried for my safety or my image. I have no hidden agenda here.
I will state what I believe again: we are giving way too many vaccines to young children. This does NOT mean we should stop ALL vaccines. So let the critics not twist my words.
Do not let the doctors who think I am science-illiterate shout this down.
These voices must be heard.
News18 Bihar@News18Bihar
सहरसा: HPV टीका लगने से 30-35 छात्राएं हुई बेहोश...छात्राओं को सदर अस्पताल में कराया भर्ती...जिलाधिकारी ने स्थिति को बताया सामान्य
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@svembu We need to be able to simulate each human's physiology, genetics, lifestyle, drug interactions etc.etc. at an unprecedented level of accuracy to give personalized medicine / vaccine that always works. It's impossible with the tools we have today, and hence statistics.
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To understand why medicine is so complex, let's make a crude simplifying assumption that there are only 100 biomarkers that are important (in reality there are vastly more). Let's also crudely assume each market is allowed only two values. That gives us 2^100 possibilities, which is about 10^30. That is vastly more than humans that ever lived. And this is with the extremely over-simplified model. We face a practical infinity of possibilities.
In reality, no two patients are ever really alike. No statistical model can give you very high confidence on how to treat. That is why AI can never treat patients, because human doctors exercise something called "clinical judgment".
That judgment is what enables a doctor to tell us "this is not a serious issue, get good sleep" vs "this definitely needs deeper investigation". That judgment is hard. Often they cannot even explain why they arrived at this but great doctors have that intuition. The entire Big Medicine is about systematically dismantling clinical judgment and convert doctors to mere "protocol pushers". Great doctors resist this.
Now on top of the measurable biomarkers, there is the unmeasurable factor called "mental state". Every good doctor knows a positive mental state in a patient leads to far better clinical outcomes. That is why good doctors practise compassionate medicine, not just numbers based medicine. I know an outstanding skin doctor in Chennai who prescribed me medicine for my very-itchy Eczema that I had endured for months, and he also told me "try to avoid stress and it may go away, and you may not even need the medicines I prescribed". I consciously reduced my stress level and the problem went away without medicine. That is a truly great doctor.
What does it have to do with autism-vaccine connection? As my crude numerical analysis showed, we have the problem of N=1 way too often in medicine and that is even more true for autism where each kid is truly unique, and that is why statistics are mostly useless and clinical judgment is mostly all we have. We cannot have broad sweeping mandates, definitely not broad vaccine mandates. Each doctor has to exercise their judgment with their patient. And they have to listen to the patient concerns first.
What Big Medicine is about is to try to reduce medicine to be a pure statistical science and it is not. Conditions like autism do not fit that paradigm at all.
That is the battle here. At its core it is not just an autism battle, it is a philosophy of medicine battle.
I pledge to keep fighting this fight because I nearly wanted to commit suicide at one one point in my life. Just this morning, a depressed parent approached me for advice and that started my X thread today.
I urge intelligent doctors to debate this philosophy of medicine issue. I will not respond to the arrogant "stay in your lane" types.
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@ylecun Unrelated, to the post but a question I sincerely want to ask you.
When you say today's AI is not even at a dog / cat level intelligence, you mean that as a rigorous statement ? Or just as a poetic exaggeration?
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One cannot show that turbojets are safe before actually building turbojets and carefully refining them for reliability.
The same goes for AI.
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Raviteja Chivukula retweetledi
@FinMinIndia @wintrackinc As a starting point, just read this post and tell me how all these rules fit in the ease of doing business target of the govt. Pathetic Goyal ji. Please have a look @PiyushGoyal @PiyushGoyalOffc
x.com/chennaicustoms…
Chennai Customs@ChennaiCustoms
In response to serious and false allegations made by @PrawinGaneshan regarding Bill of Entry No. 3837029 dated 12.08.2025, we categorically place the following facts on record. This importer has an established pattern of making unsubstantiated allegations of corruption and bribery on this platform, only to delete such posts once factual rebuttals are provided by this department. The documented facts are as follows: During examination, goods declared under CTH 90191010 were found to be misclassified and correctly classifiable under CTH 90191020. The importer accepted this reclassification on 01.09.2025, confirming the misclassification. Physical examination revealed eight boxes containing USB charging cables that were completely undeclared in the Bill of Entry, commercial invoice, and packing list - a clear violation of Section 111 of the Customs Act, 1962. The imported goods contain built-in rechargeable batteries, making EPR registration from Central Pollution Control Board mandatory under Rule 13 of Battery Waste Management Rules, 2022. Despite repeated queries on 29.08.2025, during personal hearing on 08.09.2025, and again on 29.09.2025, no EPR certificate was provided. Instead, the importer submitted wrong documentation (E-waste undertaking) and made legally untenable claims of MSME exemption, finished product exemption, and low battery capacity exemption - none of which exist under the Battery Waste Management Rules, 2022. The allegations of harassment and non-cooperation are demonstrably false. The importer was granted personal hearing on 08.09.2025 in full accordance with principles of natural justice. Bonding permission under Section 49 of Customs Act was granted on 11.09.2025 specifically to help the importer avoid demurrage charges during adjudication. Postponement was accommodated on 19.09.2025 when the importer requested additional time. At no stage was any payment or bribe demanded - all queries pertained strictly to mandatory statutory compliance under Battery Waste Management Rules 2022, BIS Act 2016, Legal Metrology (Packaged Commodities) Rules 2011, and Customs Act 1962. Furthermore, during pendency of adjudication proceedings on this Bill of Entry, the same importer filed identical goods through a related entity (wife's company) on 12.09.2025 with the same compliance gaps, demonstrating systematic evasion rather than inadvertent error. During an official meeting on 30.09.2025, the importer attempted to intimidate senior officers through threats of media exposure and self-harm when informed that due process must be followed. This conduct has been formally documented and reported. The importer's social media posts reveal a calculated pattern: allegations of corruption when facing legitimate scrutiny, followed deletion of his thread when facts of violation by importer are placed on record. This selective narrative is a deliberate tactic to pressure officials into releasing cargo without following due process. We categorically state that every action taken was legally mandated, procedurally proper, and based on documented violations discovered during examination. Chennai Customs will not be deterred by false allegations from performing its statutory duties. We remain committed to lawful, transparent, and professional conduct while enforcing regulations designed to protect public health, consumer safety, and environmental standards.@cbic_india
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@ChennaiCustoms @PiyushGoyal ji, This... is how difficult it is to import things into India, irrespective of whether there was corruption.
This is death by process for small startups wanting to build things in India.
Please simplify customs for startups, sir. It is a national waste of energy.
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In response to serious and false allegations made by @PrawinGaneshan regarding Bill of Entry No. 3837029 dated 12.08.2025, we categorically place the following facts on record. This importer has an established pattern of making unsubstantiated allegations of corruption and bribery on this platform, only to delete such posts once factual rebuttals are provided by this department.
The documented facts are as follows: During examination, goods declared under CTH 90191010 were found to be misclassified and correctly classifiable under CTH 90191020. The importer accepted this reclassification on 01.09.2025, confirming the misclassification. Physical examination revealed eight boxes containing USB charging cables that were completely undeclared in the Bill of Entry, commercial invoice, and packing list - a clear violation of Section 111 of the Customs Act, 1962. The imported goods contain built-in rechargeable batteries, making EPR registration from Central Pollution Control Board mandatory under Rule 13 of Battery Waste Management Rules, 2022. Despite repeated queries on 29.08.2025, during personal hearing on 08.09.2025, and again on 29.09.2025, no EPR certificate was provided. Instead, the importer submitted wrong documentation (E-waste undertaking) and made legally untenable claims of MSME exemption, finished product exemption, and low battery capacity exemption - none of which exist under the Battery Waste Management Rules, 2022.
The allegations of harassment and non-cooperation are demonstrably false. The importer was granted personal hearing on 08.09.2025 in full accordance with principles of natural justice. Bonding permission under Section 49 of Customs Act was granted on 11.09.2025 specifically to help the importer avoid demurrage charges during adjudication. Postponement was accommodated on 19.09.2025 when the importer requested additional time. At no stage was any payment or bribe demanded - all queries pertained strictly to mandatory statutory compliance under Battery Waste Management Rules 2022, BIS Act 2016, Legal Metrology (Packaged Commodities) Rules 2011, and Customs Act 1962.
Furthermore, during pendency of adjudication proceedings on this Bill of Entry, the same importer filed identical goods through a related entity (wife's company) on 12.09.2025 with the same compliance gaps, demonstrating systematic evasion rather than inadvertent error. During an official meeting on 30.09.2025, the importer attempted to intimidate senior officers through threats of media exposure and self-harm when informed that due process must be followed. This conduct has been formally documented and reported.
The importer's social media posts reveal a calculated pattern: allegations of corruption when facing legitimate scrutiny, followed deletion of his thread when facts of violation by importer are placed on record. This selective narrative is a deliberate tactic to pressure officials into releasing cargo without following due process. We categorically state that every action taken was legally mandated, procedurally proper, and based on documented violations discovered during examination.
Chennai Customs will not be deterred by false allegations from performing its statutory duties. We remain committed to lawful, transparent, and professional conduct while enforcing regulations designed to protect public health, consumer safety, and environmental standards.@cbic_india
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From October 1, 2025, our company will cease import/export activities in India.
For the past 45 days, Chennai Customs officials have relentlessly harassed us.
After exposing their bribery practices twice this year, they retaliated, effectively crippling our operations and destroying our business in India.
We deeply thank everyone who has supported us during these difficult times.
#wintrackinc #imports #exports #chennaicustoms #chennaicustom #airportcustoms #seaportcustoms
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@Tejasvi_Surya @svembu What is so hard about implementing a good public transport?
1. Allow people to live track, book a seat, and board air-conditioned
2. Regular buses with just live tracking
Build predictability and analytics over time.
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Great to see voices like Sri @svembu’s amplifying the cause of better public transport in Indian cities.
India simply can’t go the US model of each man owning a car. We are too densely populated for it.
World over, city after city, it has been shown that public transport is the only solution for congestion.
Bengaluru definitely needs to limit the number of cars on the streets while rapidly increasing reliable, comfortable, efficient and affordable public transport.
Sridhar Vembu@svembu
I want to add that Singapore, one of the most advanced economies in the world and one of the most livable cities, relies extensively on public transport. Singapore also limits the number of private cars through the mechanism of open market trading of Certificate of Entitlement (COE) needed to own a car and the certificate costs more than Singapore $100K (and the car price is on top of that). Indian cities are far more dense than Singapore. We have to build extensive public transport to make our cities livable. It can be done.
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@svembu Sir, which of the following can you imagine being built out of Tenkasi, with the resources, ecosystem & talent there:
1. Quantum computers?
2. MRI machines?
3. Turbofan components for GE?
4. Lithography machines, SMT placement machines?
5. Neodymium magnets?
6. Cutting edge AI?
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There is a vast Bharat that is not obsessed about prestigious credentials, not obsessed about speaking perfect English, not obsessed about enrolling 11 year old kids (yes!) in JEE or NEET coaching and not obsessed about the stock market - it is talent from that Bharat that has the latent creative energy for our national development. That very much includes hard scientific and technical talent.
I am so convinced of this proposition that I am dedicating my energy to finding and nurturing that talent.
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@keithyap_1 @bookwormengr @dwarkesh_sp ChatGPT was 0-1. DeepSeek is still 1-N.
If someone in the world shows that it can be done, the Chinese do it much much better. I don't mean to trivialize it all, in fact I have huge respect for it. But 0-1, I have not heard Chinese companies do it, not yet.
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@bookwormengr @dwarkesh_sp For a long time China was seen as only capable of 1-N innovation and not 0-1.
When DeepSeek came out, that myth was destroyed
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“Chinese can not innovate” that is baseline belief of this economist.🤦♀️
@dwarkesh_sp doesn’t seem to seek contrarian perspective. He understands AI, he should know better.
Confirmation bias seems to be flaw that this fine fellow, seems not to be able to avoid.
Dwarkesh Patel@dwarkesh_sp
When Xi Jinping came to power, some of China’s smartest insiders said he’d be China’s Reagan. That didn’t happen. Instead, China doubled down on infrastructure and real estate, which make up a third of GDP. As its growth model gets exhausted, does it mean that China might never catch up to the U.S.? Full episode with @krogoff out now.
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Thanks @RajanAnandan for the kind words! Happy and proud to be building deep tech out of India!
Rajan Anandan@RajanAnandan
This is the @perceptyne team - a seed stage company building AI+Robotics. World class deep tech talent. Building in Hyderabad. Simply can't be more excited about the caliber of founding teams in India! @jaggaraju16 @ravitejacr @Mrutyunjay042
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This is an excellent post by @Molson_Hart on the difficulty of setting up a manufacturing ecosystem.
Large companies must invest to create and nurture an ecosystem of suppliers.
molsonhart.com/blog/america-u…
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@svembu @Molson_Hart Large companies already do that. What's missing is this: deep understanding of manufacturing from policy makers and a carefully constructed strategy to develop the same.
Everyone, including our own policy makers, think it's just a game of incentives & disincentives, it's not!!
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@Nithin0dha Unavailability of risk capital for deep tech is the root cause.
When all that every investor wants to invest is into low-tech internet enabled businesses, how will a Deepseek emerge out of India?
Case in point: how many research / deep tech companies has Rainmatter invested in?
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In the 1960s-1970s, India and China had roughly the same per capita GDP. They started their reforms in the 1980s, and by 1990, they had overtaken our per capita GDP. Say what you will about the differences in our worldviews and economic models, but their scientific and technological progress is undeniable across disciplines—DeepSeek is just the latest example.
I saw this chart in an Economist (link in next tweet) article. It gives you a quick and dirty idea of the progress China has made despite the fact that papers and citations can be gamed. India wouldn’t even show up on the chart.
I think the problem that has always plagued India is short-termism. Problems are typically addressed through a patchwork or the Jugaad mentality. This is true when it comes to business, politics, regulatory approaches, etc. Many problems that require focused long-term thinking instead get band-aid fixes. This is not to say that we haven't made progress. In my own lifetime, we have come a long way, but not nearly enough.
For example, you can’t just buy GPUs and expect Indians to create groundbreaking AI applications. Without the right talent and an enabling ecosystem that facilitates innovation, all the GPUs in the world will be pointless.
We need to seriously start building our research capabilities. While India does produce great researchers, we don’t seem to offer a conducive environment for them, which is why the majority of them go to the US. Again, this is not something that will show results instantly. In the case of China, it was 2 decades at the bare minimum focusing just on research. If we start focusing on building our research and scientific capabilities, we will hopefully see results in 5 to 10 years.
This is all the more important in the world that AI will shape where being mediocre won't be an option.
As K put it in his recent post (link in the following tweet), check the image.
And about Deepseek, thank god that it is open source.
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@Nithin0dha Can someone throw light on how these scammers are getting so many mobile numbers at their disposal? (In spite of biometric verification needed for getting SIM). And then even if they do, why then are they not being traced?
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Imagine this:
You get an unexpected call from a courier company. The representative tells you that the police have held a parcel of yours because it has drugs and other illegal items. They even disclose some personal details, like your Aadhaar number, etc. Soon, you'll also get calls from police, CBI, etc.
This is the beginning of courier scams that have just exploded in recent years. These scams are so realistic that most of us would probably fall for them regardless of how smart we are because they take advantage of our fears.
Every day, hundreds of people lose lakhs of their hard-earned money to these scams. Recently, the Zero1 team spoke to an actual scammer and recorded the call to break down and explain how this scam works. Watch it and share it with your friends and family.
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@ylecun @miklelalak @ylecun , can you explain what you mean when you say cat / dog level intelligence. I understand the general sense in which you are saying it, but I'm curious to know specifics.
Like what can a cat do, intelligence wise, that today's AI cannot yet do?
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@miklelalak Right now, we are not even at the level of a cat.
So, we've got some ways to go before we get to human level.
Any human.
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I said that reaching Human-Level AI "will take several years if not a decade."
Sam Altman says "several thousand days" which is at least 2000 days (6 years) or perhaps 3000 days (9 years).
So we're not in disagreement.
But I think the distribution has a long tail: it could take much longer than that. In AI, it almost always takes longer.
In any case, it's not going to be in the next year or two.
Chubby♨️@kimmonismus
I seriously wonder why Yann Lecun takes such different positions from Sam Altman and Dario Amodei. Sam and Dario have made it clear in their posts that they believe reasoning will be solved, if not now, then in a few years' time. What's more: in his last post, Dario said that AGI could be realized as early as 2026. And Sam Altman also says that ASI will come in a few thousand days. So why is Yann again talking about assuming decades? Does it have a more complex definition? Has Meta lost more ground after all? So far I don't have a well-founded answer.
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@GoI_MeitY @dgftindia
CHIMS feels like a punishment given by MeitY for being a hardware company in India. Totally redundant information which can be got from the invoice / internet is being asked again. Adds unnecessary delay to R&D activity, slows it down. Please stop this!
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