Joan Arenas

Hand Surgeon

[Elies Campo @elies]

🧵 PAY ATTENTION: @EU_Commission is spending €30 million on ads.

A European campaign telling citizens that "BAR JOKES" don't cost you your freedom in the EU.

The ad is running in Spain right now.

Spain. Where people have gone to prison for jokes, songs, tweets, puppet shows.

[Joan Arenas @handsurgery9]

@NathanJRobinson @jsamperiz1 Not only the university, but humankind itself by making it dispensable. It's called evolution

[The Humanoid Hub @TheHumanoidHub]

Everything Elon said about Optimus at the All-In Summit today:

• We’re finalizing the design of Optimus v3. That release is going to be a very remarkable robot. It will have manual dexterity comparable to a human, meaning a very complex hand, an AI mind that can navigate and comprehend reality, and will be made in very high volume.

• Other robotics companies are missing those three very hard things.

• I spend more mental cycles on Optimus than any other single thing. Solving real-world AI, all of the electrical-mechanical issues, the supply chain, and production challenges.

• There is no supply chain for humanoid robots, so it has to be created from scratch, which requires a lot of vertical integration. None of the actuators in Optimus are available from an existing supply chain.

• I think if successful, Optimus would be the biggest product ever.

• The marginal cost of production, once we hit a million units per year, will probably be around $20,000. It depends on how much we spend on the AI chip in the robot, and we’ll need to achieve a lot of efficiencies in the actuators—26 actuators per arm (26 motors, gearboxes, and power electronics). The AI chip might cost $5,000 or $6,000, maybe more. At 1 million units a year, production cost will be $20,000, maybe $25,000. Price will be a function of demand.

• Human hands have evolved to be incredibly sophisticated machines. Hands are a very first instrument. You can swing a baseball bat, thread a needle, play a piano or violin, and assemble a car. Hands are incredibly versatile instruments. Most of the muscles of the hands are actually in the forearm, and the hand is almost like a puppet. Human tendon evolution is incredibly good. The human hand has 27 or 28 degrees of freedom, depending on how you count it; it’s amazing.

• In order to create a robot that can be a generalized humanoid, you must solve the “hands problem.”

• Even though there are 10,000 to 20,000 electric motors out there, we couldn’t buy the actuators for any amount of money. We had to design every electric motor, gearbox, and controlling electronics from scratch, from first principles of physics.

• Optimus is harder than developing any previous Tesla product, but not harder than Starship.

• Right now, we’re struggling with the final design of the hardware, primarily the hand. The hands and forearm are the majority of the engineering difficulty of the entire robot.

• If you want to do all the things that a human can do, it turns out you need a humanoid robot. If you want to do a subset, that’s much easier. Humans evolved to the shape and capability that we have for a good reason. There is value to having four fingers and a thumb; even the pinky is quite useful. Toes are much more of a question mark.

• The AI5 inference chip will be 40 times better than AI4 by some measures. We know the limiting factors of the chip because the AI software and hardware teams work so closely. Effectively, the Tesla AI hardware and software teams are co-designing the chip.

• The Softmax function on AI4 takes 40 steps in emulation mode, which will take only a few steps in AI5 natively. AI5 will easily handle mixed precision.

• In terms of nominal raw compute, the AI5 inference chip has 8 times more compute, 9 times more memory, and 5 times more memory bandwidth compared to AI4. Because we’re addressing some core limitations and optimizations at the silicon level, we’re able to realize 40x improvements.

[Joan Arenas @handsurgery9]

@BoigBCN Que opines d'aquesta teoria @grok ?

[Joan Arenas @handsurgery9]

@jpagesm @boye_g @QuicoSalles El cap de la fiscalia anticorrupció Alejandro Luzón, fins i tot va demanar a la fiscal del cas , Garcia Cerdà, que afluixés l'accelerador. Al final, el FGE, Garcia Ortiz, multant a Carmen García Cerda amb 1000€ per desobeir les ordres del seu cap
https://t.co/uOjc0YDgSJ

[Ari Soler @AriSoler00]

SIUSPLAU DEMANO DIFUSIÓ

Vull parlar sobre la situació de delinquència i okupació que hi ha a l’Avinguda Països Catalans de Santa Margarida i els Monjos

No hem fet un tuit abans perquè a casa meva estem atemorits per les repercussions, ha arribat a un punt que és insostenible.⬇️

[halseyhands @halseyhands1]

“His default mode is to help, to improve everything he touches, to harness his considerable talent & energy to deliver what is needed…

…a quiet, modest colossus in the Hand Surgery world. His humility matches his skill, wisdom & dedication”

Huge congratulations Carlos

[Joan Arenas @handsurgery9]

https://t.co/P9oto7bT6j

[Manuel García @Candeliano]

Impresionante la colaboración del ejército español.

[María del Olmo Ibáñez @MariadelOlmoI]

El despliegue de la escolta de los reyes hoy en Valencia es MISERABLE. Propio de un Estado medieval de SÚBDITOS SUMISOS y un OFENSA terrible para un pueblo que lleva seis dias sufriendo por NEGLIGENCIA CRIMINAL de sus políticos.Con una gestión de la ayuda INCONCEBIBLE en Europa

[Joan Arenas @handsurgery9]

@makinetatemps Es un lloc amb una història fascinant i hostes com Jacint Verdaguer l'any 1874

[Joan Arenas @handsurgery9]

@aleixsarri @jordicabre I també diu molt, massa, dels no perseguits.

[Joan Arenas @handsurgery9]

@apuente Y las relaciones entre PSOE y VOX/PP son más fluidas y amistosas que entre partidos independentistas?

[Joan Arenas @handsurgery9]

@EricTopol @ScienceMagazine @geoffreyhinton Just asking. Is AI just another step in human evolution and unfortunately/fortunately will lead to the extinction of Homo Sapiens within the next centuries in the same way Homo Sapiens caused the extinction of neanderthals?

[Joan Arenas @handsurgery9]

@Samra93070618 @Rainmaker1973 Fundings from many big corporations interested in pouring money on it with commercial interests have been rejected. From the beginning Sagrada Familia has been funded only by citizens from Catalonia and only in recent years from tourists from all over the world that visit it.

[The Humanoid Hub @TheHumanoidHub]

"The hand is where the mind meets the world."

@elonmusk said that the next-gen Optimus hand will feature 22 Degrees of Freedom (DoF), while the Gen2 hand has only 11, which does not include wrist movements.

What DoF does the Gen2 hand lack compared to the human hand?

[Joan Arenas @handsurgery9]

@KRLS @quimforn Malauradament, President, la meitat de la població que viu a Catalunya pensa com aquest senyor.

[Joan Arenas @handsurgery9]

@NeinQuarterly + @MonsieurNouar = ?

[Nein. @NeinQuarterly]

We regret to inform you that the intelligence is artificial. The ignorance, real. And your college degree, somewhere in between.

[Joan Arenas @handsurgery9]

@BoigBCN On puc trobar fotografies antigues dels carrers de Barcelona? Concretament en busco alguna del de Sant Pere més Alt. Gràcies