Quiz del lunedì: Qual è stato il primo satellite di telecomunicazioni attive?
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Quiz del lunedì: Qual è stato il primo satellite di telecomunicazioni attive?
Soluzione domani, provate a indovinare senza cercare su internet. Se siete sicuri di sapere la soluzione, lasciate qualche riga vuota prima di scriverla, in modo da non rovinare il gioco agli altri.
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undefined oblomov@sociale.network shared this topic on
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Quiz del lunedì: Qual è stato il primo satellite di telecomunicazioni attive?
Soluzione domani, provate a indovinare senza cercare su internet. Se siete sicuri di sapere la soluzione, lasciate qualche riga vuota prima di scriverla, in modo da non rovinare il gioco agli altri.
La risposta esatta è Telstar-1, anche se sono necessarie alcune precisazioni.
(continua)
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La risposta esatta è Telstar-1, anche se sono necessarie alcune precisazioni.
(continua)
Un satellite attivo di telecomunicazioni è in grado di ricevere un segnale, amplificarlo e ritrasmetterlo immediatamente a terra, permettendo così comunicazioni a lunga distanza, secondo un’idea lanciata dallo scrittore di fantascienza Arthur C. Clarke nel 1945.
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undefined filobus@sociale.network shared this topic on
Gli ultimi otto messaggi ricevuti dalla Federazione
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@davew Nitpicky, but this is more of a daydream, an admittedly very attractive one.
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TARS-Like Robot Both Rolls, and Walks
[Aditya Sripada] and [Abhishek Warrier]’s TARS3D robot came from asking what it would take to make a robot with the capabilities of TARS, the robotic character from Interstellar. We couldn’t find a repository of CAD files or code but the research paper for TARS3D explains the principles, which should be enough to inspire a motivated hacker.
What makes TARS so intriguing is the simple-looking structure combined with distinct and effective gaits. TARS is not a biologically-inspired design, yet it can walk and perform a high-speed roll. Making real-world version required not only some inspired mechanical design, but also clever software with machine learning.
[Aditya] and [Abhishek] created TARS3D as a proof of concept not only of how such locomotion can be made to work, but also as a way to demonstrate that unconventional body and limb designs (many of which are sci-fi inspired) can permit gaits that are as effective as they are unusual.
TARS3D is made up of four side-by-side columns that can rotate around a shared central ‘hip’ joint as well as shift in length. In the movie, TARS is notably flat-footed but [Aditya] found that this was unsuitable for rolling, so TARS3D has curved foot plates.
The rolling gait is pretty sensitive to terrain variations, but the walking gait proved to be quite robust. All in all it’s a pretty interesting platform that does more than just show a TARS-like dual gait robot can be made to actually work. It also demonstrates the value of reinforcement learning for robot gaits.
A brief video is below in which you can see the bipedal walk in action. Not that long ago, walking robots were a real challenge but with the tools available nowadays, even a robot running a 5k isn’t crazy.
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Current* conditions near Wawa, ON:
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Idea for a SNL skit. Trump, played by Alec Baldwin, sits behind the desk in the Oval Office. Aides around him. He cracks self-deprecating jokes. Praises Barack Obama and Hillary Clinton. Calls Melania and tells her he loves her. Fires his children. Signs resignation letter.
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@aud worst version: you are responsible for the mistakes you haven't made yet
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@aeva@mastodon.gamedev.place I studied science explicitly so I wouldn't have to be held responsible for my mistakes
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@aud you were always destined to have some lingering doubt over whether or not you could have or could not have done anything different in a moment where only one thing ever happened
