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Cake day: April 10th, 2025

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  • Are you somehow entirely unaware of the DEW crowd control devices that have been being used for like 2 decades now?

    https://en.wikipedia.org/wiki/Active_Denial_System

    Yeah, the whole point of these things is they basically microwave the outer layer of your skin, when in wide beam mode.

    Or, they can be dialed in to be a more concentrated beam… to uh, internally heat up a bit more than just your skin.

    But uh, for legal reasons of course nooo they do not do that and cannot do that.

    While it is claimed not to cause burns under “ordinary use”,[50][51] it is also described as being similar to that of an incandescent light bulb being pressed against the skin,[14] which can cause severe burns in just a few seconds. The beam can be focused up to 700 meters away, and is said to penetrate thick clothing although not walls.[52] At 95 GHz, the frequency is much higher than the 2.45 GHz of a microwave oven. This frequency was chosen because it penetrates less than 1⁄64 of an inch (0.40 mm),[53] which – in most humans, except for eyelids and the thinner skin of babies – avoids the second skin layer (the dermis) where critical structures are found such as nerve endings and blood vessels.

    I would imagine that if you had an emorous amount of microwave energy from an orbiting solar array, being beamed to a recieving station on earth, (ie, a very small small space compared to the distance involved) and it uh, missed, yeah, yeah it would microwave people.

    There’s also this:

    https://pmc.ncbi.nlm.nih.gov/articles/PMC8733248/

    Brief but intense pulses of radiofrequency (RF) energy can elicit auditory sensations when absorbed in the head of an individual, an effect known as the microwave auditory or “Frey effect” after the first investigator to examine the phenomenon (1). The effect is known to arise from thermoacoustically (TA)-induced acoustic waves in the head (2).

    Lin has proposed that the Frey effect may be linked to unexplained health problems reported by U.S. officers in Cuba and elsewhere, the so-called Havana syndrome (3).

    Probably don’t tell any schizophrenics you may or may not know about that.


  • sp3ctr4l@lemmy.dbzer0.comtoMemes@sopuli.xyzBest Friend 🫂
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    19 hours ago

    I’ve not had much experiences with donkeys beyond basically state fairs, but that does track with what I’ve heard about them…

    … tend to be a fair deal more intelligent than the average horse, and yeah I have heard that they’ll actually stand and fight, more often than a horse, who will often just freak out and then run in some random direction, potentially directly into a tree.




  • You can’t make a reasonable microwave receiver lighter than solar film and efficiency peaks around 50% in FIXED installations

    https://www.sciencedirect.com/topics/engineering/microwave-power-transmission

    In JPL 30 kW power was transmitted for 1.54 km with reception conversion array having an efficiency of 80%

    That was 8 years ago.

    What I’m describing are… currently extremely active areas of research.

    Microwave power transfer has been used for many applications since its inception by Maxwell. Wireless charging of EVs and UAV using microwave power are some of the widely researched examples.


    you can easily assume less than a quarter (under 10%) when the target isn’t just moving, but is also changing angles and distance (you’d have to put the receiver on a gimbal like for cameras)

    You should maybe look into the level of precision that things like Phalanx CIWS systems have at tracking a moving target, with the ability to throw bullets at it, and hit it.

    Or basically any SPAAG type platform that throws rounds down range.

    Or I dunno, MASERs used in deep space transmission.

    Or all the research that has gone into developing tracking gimbal systems that do intentionally use lasers or some kind of DEW to shoot down small drones, or damage aircraft in flight, or burn out incoming missiles.

    Hell of a lot easier to track a friendly aircraft.


    and now it’s also interfering with flight (propeller airflow, unless you do weird propeller geometries or tilted body flight

    Genuinely no clue what you are talking about.

    Are you assuming only like, quadcopters here?

    We’ve had RQ 4 drone aircraft the size of WW2 medium bomber planes, with jet engines, for 20 years now.

    I’m fairly sure that a jet engine produces a considerable amount of consistent heat.

    Do… you think aircraft engineers… do not know… how to handle… heat?

    Shall I describe a ramjet to you?

    Or maybe we could go with something like the Space Shuttle’s reentry tiles?


    In conclusion, you are vastly uniformed as to the state of… not even state of the art technology, that would be incredibly relevant to this discussion.



  • We don’t even have automated battery replacement working on the ground, while stationary.

    Building aircraft with a whole bunch of their body and mass that significantly changes, in flight, is extremely expensive and difficult.

    Its why the V22 Osprey is widely regarded as a death trap, why we stopped building swing wing F-14s.

    … Have you ever tried to uh, remove your car’s rear seats, while on the highway, at 60 mph, and then also installed new seats, from a neaby car travelling alongside you?

    Ok now do that with aircraft, at 15k feet, going 600 mph.

    Yeah I’m sure that’ll be about as efficient as Elon Musk’s approach to designing the Starship+HeavyBooster.


  • Oh, ok.

    Even though this entire post is… about how it is small enough to fit on a drone, and efficient enough to power it for 3 hours.

    Ok.

    Gotcha.

    I’m not sure if you’re aware of this, but densely packed explosive bombs and missiles and warheads tend to be pretty heavy.

    … the entire problem with purely onboard solar powered vehicles of any kind is that they have to be absurdly lightweight, flimsy.

    That isn’t practical.

    It might be purely efficient, in a sense, but it isn’t very useful.

    Being able to actually move stuff, that is practical.

    Most transportation modes involve the ability to haul stuff.

    You know, do work, aka the capacity to make stuff move.

    You picking a fight that makes no sense to pick.

    You can have solar and batteries be more stationary, and use microwaves to power things that are more mobile, this post is literally the proof of that concept… you can charge a battery with a any kind of power source.

    Look heres another massive potential application of this, if you science fiction extend the accuracy/capability of this:

    Plop a bunch of solar panels/batteries in the L1 point between the Earth and the sun.

    Now, via a set of satellites in something like concentric orbits, you can get absurd amounts of power, beam it back along chains of satellites, snd then beam it to recieving stations on Earth. Or the Moon. Or orbital infrastructure.

    Microwave transmission power loss will be waaaay less in space, because there’s no atmosphere.

    Same with solar panel efficiency!

    Solar Power + Microwave Transmission = Very Good, Actually.






  • sp3ctr4l@lemmy.dbzer0.comtomemes@lemmy.worldThis is gonna be good
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    1 day ago

    So there is actually a semi-valid reason to find a lot of skeletons in bathrooms and not other places, in a post US nuclear apocalypse:

    A fair number of buildings are most structurally sound around the bathroom, because those room walls tend to be stronger/reinforced compared to other walls, to be able to handle all the plumbing.

    Bathrooms also tend to be located closer to the inside of the building, for basically the same reason.

    So, its pretty reasonable that if you heard the sirens go off, had only a minute or two… yeah, sheltering in the bathroom would be the optimal strategy, if you don’t have a basement/cellar.


  • Horses are very often dumb idiot assholes.

    Much more so than dogs.

    Yes, they’re very, incredibly useful.

    Not really great ‘friend’ material though, more like you cajole them into helping you, and they maybe kind of trust you, sort of.

    Wolves that we domesticated into dogs literally evolved into having eyebrow and other facial muscles that allow them to convey emotion much more analgously to how humans do.



  • The entire AAA video game industry right now is basically freaking out, panicking and financially imploding right now, after at least a solid decade of mainly figuring out how to waste an enormous amount of money…

    While all trying to be the next big live service game.

    A live service game isn’t so much a game as it is a platform itself, a cash shop for in game content, a social media platform in itself.

    (See Roblox for an extremely problematic but successful version of pulling this off)

    These people all failed miserably at this, such that Ubisoft imploded, EA got bought out by Saudi Blood Money, Unity itself is imploding as an organization, MSFT switched its gaming division into pure wealth extraction mode before they shut it down in ~5 years and just act as IP liscensing overlords… etc.

    They all tried to establish vertically integrated businesses, and despise that they can’t come close to matching Valve, the most competent horizontally built business in the entire industry.

    And yes, the ‘video game industry’ includes nearly all ‘video game journalists’.

    These people are with few exceptions, allergic to doing any actual investigative journalism, they’re mostly just paid to manipulate the flow of discourse around video games, as a form of marketing.