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Gli ultimi otto messaggi ricevuti dalla Federazione
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  • What did you want to be when you grew up?

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  • Wind Power Is Taking Off In China– All The Way to 2000 m AGL

    2000 m above ground level (AGL), winds are stronger and much, much more consistent than they are at surface. Even if the Earth were a perfect sphere, there’d be a sluggish boundry layer at the surface, but since it’s got all these interesting bumps and bits and bobs, it’s not just sluggish but horribly turbulent, too. Getting above that, as much as possible, is why wind turbines are on big towers. Rather than build really big tower, Beijing Lanyi Yunchuan Energy Technology Co. has gone for a more ambitious approach: an aerostat to take power from the steady winds found at high altitude. Ambitiously called the Stratosphere Airborne Wind Energy System (SAWES), the megawatt-scale prototype has recently begun feeding into the grid in Yibin, Sichuan Province.

    The name might be a bit ambitious, since its 2000 m test flight is only one tenth of the way to the stratosphere, but Yibin isn’t a bad choice for testing: as it is well inland, the S2000 prototype won’t have to contend with typhoons or other ocean storms. The prototype is arguably as ambitious as the name: its 12 flying turbines have a peak capacity of three megawatts. True, there are larger turbines in wind farms right now, but at 60 m in length and 40 m in diameter, the S2000 has a lot of room to grow before hitting any kind of limit or even record for aerostats. We’re particularly interested in the double-hull construction– it would seem the ring of the outer gas bag would do a good job funneling and accelerating air into those turbines, but we’d love to see some wind tunnel testing or even CFD renderings of what’s going on in there.
    A rear view shows the 12 turbines inside the double hull. It should guide air into the gap, but we wonder how much turbulence the trusses in there are making.
    During its first test flight in January 2026, the system generated generated 385 kilowatt-hours of electricity over the course of 30 minutes. That means it averaged about 25% capacity for the test, which is a good safe start. Doubtless the engineers have a full suite of test flights planned to demonstrate the endurance and power production capabilities of this prototype. Longer flights at higher capacity may have already happened by the time you read this.

    Flying wind turbines isn’t a new idea by any means; a few years ago we featured this homemade kite generator, and the pros have been in on it too. Using helium instead represents an interesting design choice–on the plus side, its probably easier to control, and obviously allowing large structures, but the downside is the added cost of the gas. It will be interesting to see how it develops.

    We’re willing to bet it catches on faster than harvesting wind energy from trees.

    All images from Beijing Lanyi Yunchuan Energy Technology Co., Ltd.

    hackaday.com/2026/02/26/wind-p…

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  • I nuovi schiavi dell’algoritmo
    @anarchia
    di Mario Sommella (*). Abbiamo rubato le immagini (addirittura 8) al grande Mauro Biani. Caporalato digitale, sfruttamento sistemico e complicità delle multinazionali L’immagine che non vogliamo vedere Sono le sette del mattino. In una città italiana qualunque, un uomo di...

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  • Large Hadron Collider, he typed carefully

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  • @reiver no, it's just a regular acct:

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  • “le atlete italiane vincono, ma non contano”. il medagliere olimpico visto in prospettiva di genere, tra pinkwashing e gender gap
    @anarchia
    Le atlete italiane si sono distinte in molte discipline in questa edizione delle Olimpiadi invernali, regalando al Paese la maggior parte delle medaglie e offrendo uno spaccato

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    @jblue usually there are clauses about law enforcement, govt actions.
  • Traveling to the US with an ESTA in 2026

    Herve Family esta uspol
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    It looks like the ESTA application process is about to get quite a bit more complicated. Check this proposal for changes to the process:Agency Information Collection Activities; Revision; Arrival and Departure Record (Form I-94) and Electronic System for Travel Authorization (ESTA)Among the changes, here is what jumps out to me:CBP is adding social media as a mandatory data element for an ESTA application. The data element will require ESTA applicants to provide their social media from the last 5 years.[…]CBP will add several “high value data fields” to the ESTA application, when feasibleEmail addresses used in the last ten years;Family number telephone numbers used in the last five years;I’m not sure if those fields will be optional, or if omitting or forgetting some of that data can result in not getting an authorization of entry.I’m honestly not quite sure how I would provide such data. I use unique email addresses for most services out there. Do they accept wildcards as email addresses? 🙂In any case, comments are open so I would encourage everyone to send your feedback, maybe that will help make that process clearer.Written comments and/or suggestions regarding the item(s) contained in this notice must include the OMB Control Number 1651-0111 in the subject line and the agency name. Please submit written comments and/or suggestions in English. Please use the following method to submit comments:Email: Submit comments to: CBP_PRA@cbp.dhs.gov.It seems pretty clear at this point that the US administration does not want foreigners visiting the country anymore 🙂
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    Tonight in “war ravaged” Portland… a frog brigade standing guard outside the ICE facility. Trump says there’s “nowhere worse than Portland”… and the frogs magically multiply. They’re showing that he’s not only a liar, but Portland is still safe, still weird and still full of people resisting.#portland #frogbrigade #uspol #abolishice #fascism