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Endy0816

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Posts posted by Endy0816

  1. 5 hours ago, CharonY said:

    One issue is that the vote was seemingly broadly fear driven. Fear of others, fear of losing ones national identity, fear of changing demographics (at least these factors were found to be the strongest predictors of pro-brexit vote in studies following the referendum). Any fact and data is screened through this lens and is filtered out when it runs to the contrary. 

    One can also look at it from a cost-benefit perspective, where Brexiteers see a stronger control over immigration (and often associate it with a means to combat terrorism) as an overriding benefit, where other economic issues take a backseat. Or simply put, there is a belief that if the UK leaves the EU and restricts immigration the economy would somehow be boosted and easily overcome any negative outcomes. 

    But if you mean the leadership, they effectively harnessed these fears.

    A good post and very true though, as a US citizen, I was thinking more literally.

    I guess I've just seen too many, "If we don't like it we'll just do X." statements.

    Largely I am left thinking, "Really? You don't think others might have considered that possibility ahead of time? Not even once?"

    It's just crazy. I am curious to see what this year and the following will bring.

     

  2. 4 hours ago, John Cuthber said:

    The reason I asked, in case anyone was wondering, is that representatives of the USA have said that accepting chlorinated chicken will be a condition of any trade deal (They may, of course have been wrong).
    People who are happy to leave the EU keep saying "It's OK- it will be labelled so, if you don't want it, you don't have to have it."
     

    My best guess is that the USA will also insist on exporting its labelling laws to the UK (precisely because the chicken won't be traded if it's labelled)- so there will be no labels. (and once again, the Brexiteers will be shown to be talking through a hole in their hats).

    That is what disturbs me the most.  Brexiteers appear to think that we're all stupid.

    Not sure about sourcing and manufacture, but a perhaps suprising number of traditional UK brands are now owned by US multinationals too. Sales appear unaffected by this...

    The logos for Lays and Walkers are the most ironic example of this.

  3. 59 minutes ago, awaterpon said:

    The force which represent weight is one direction downwards opposed with small force upwards.Theses forces are not equal .The body will be at rest and no acceleration since it actually opposed by earth surface . in the case for instance the object accelerating into water , this is applied according to the calculation of what I suggested. Taking in consideration acceleration as well as water resistance

     

     

    The Earth opposes with an equal and opposite force. You can show this by flipping a scale upside down, so you are on the bottom and the Earth is on top.

    F = m1a1 = m2a2

    Keeping in mind the Earth is far more massive so the acceleration it feels is corresponding far lower.

     

    Your weight is divided between your two legs normally with the area of the foot helping to reduce the pressure(Force/Area) further. If the same force is spread over less area the pressure will naturally increase.

  4. 6 hours ago, Enthalpy said:

    Got it thanks to the drawing.

    Definitely possible. Make the exit of the tubes and their surroundings hydrophobic, that's vital. If not, water wetting beyond the exit would flow without stopping. Something should prevent items like fingers to touch the tubes' exit, or water would flow permanently.

    Some fish species may accept altitude, for instance the ones living in Titicaca. But as far as possible, I'd try to avoid the underpressure, as it introduces one failure mode more and complicates operations. Just tubes thin enough should suffice. Check how high water climbs in capillaries, this tells you how deep water can be in your aquarium. 0.1m or 0.2m seem feasible.

    I hope the aquarium is static? In a boat, a plane, a van... water could become higher at one side, increasing the pressure.

    Will do. I have some supplies coming so I can make a better test model.

    Was going to check on what fish might work best as well later. Ones that go to surface for air are definitely out, but not sure about effects of low pressures you mention or lack of a normal tank bottom. Once I'm further along on the design of the tank, there are some marine biologists I can ask.

    May just go with a wholly static display instead. Perhaps some floating pumice stones and artificial plants in the top portion.

    I'm planning to mount it up on a wall, possibly above a door way or arch for the best experience. Definitely not in anything moving lol.

  5. 8 hours ago, Enthalpy said:

    Maybe I imagine your proposal wrongly, but as soon as water wets a larger surface below the hole, the capillary action is lost. Only the lower face acts then, as inefficiently as the same face without the hole.

    If many drops joint, you also lose the benefit of a droplet with small radius. Together, they make a big drop with small curvature, where the surface tension is inefficient.

    Or if you prefer, surface tension acts on surfaces while gravity acts on masses hence volumes. Surface tension works better on small scale, like droplets or capillary tubes. You can cheat a bit with fragmented surfaces, like a wick or a sponge.

    If you can excuse my artistic skill, would look something the depiction below(with suitable valves and hydrolocks for care and maintenance).

    Fishtank.png.4fde8ae5678a425681b11bf3a6c58959.png

    Did see some of what you were talking about while filling the test model(cup). Seemed to depend on how it was being filled so not a huge issue.

  6. 23 hours ago, studiot said:

    Droplets also have a habit of falling in time.

    So I suspect you also need to factor time into this as the water will eventually run out of any hole big enough to be visible.

    I was thinking to reset periodically. Making up for lost water and expelling air that enters.

    In theory could just break the vacuum for a second and release some of the water. Use the falling water to bring clean water in.

    Still need to test what happens if something falls into one of the holes from the inside. Be embarrassing if brought down by fish poop.

  7. 17 hours ago, Enthalpy said:

    The books I've seen made the simple calculation. Problem, I have seen no experiment report telling "the books were right", and unfortunately it often happens that authors put some model or theory and imagine that Nature has to follow it.

    That is, if T is the liquid's tension and h the local height along a drop at the outlet, T*(d2h/dx2+d2h/dy2) gives you the maximum pressure difference, and it relates to the drop's radius. But I expect that the hole's material matters too, at least by restricting the angle of the drop where it exits the hole, hence the possible drop's radius. The shape beyond the hole must matter too, and definitely how far the exit is wetted. If a big area beyond the exit is wetted, the hole has no effect - which suggests the process isn't reliable or demands a special shape.

    Frankly, if this question has any sort of consequence, I'd search for experimental data or make measurements by myself.

    Thank you.

    About what I was afraid of. Had some idea to apply the concept to create a suspended water aquarium, where larger holes would look better.

    Does seem like should be more to it. You'd think the polarity would matter along with hole shape and roughness.

  8. It's atmospheric pressure or gravity that is doing the work in first two examples. Air molecules will try to come in on all sides.

    0 psig = 14.7 psia

    you can go below zero on the guage but still have a positive pressure in absolute units.

    You do see such issues when using a positive displacement pump. Those work the opposite way via cramming rather than use the weight of the atmosphere. They'll happily cause piping to burst or collapse.

  9. 1 hour ago, MigL said:

    Actually ( to be pedantic to a fault ), what the vast majority of existing clocks read, are the oscillations of a quartz crystal with an applied voltage.
    This thread is just a variation of the "what is time ?" threads we usually encounter.

    No, that's a valuable point.

    It is really only the divisions of a span of time that we can measure(1/t).

    ex.

    -|-|-|-|-|

    If the above is a span of 1 second, each oscillation is 1/5 of a second away from one another.  So counting 5 of these tells us 1 second has passed.

    This clock would have a frequency of

    5 hz

    or simply put

    5 oscillations per 1 second(5/s).

     

  10. 1 hour ago, scuddyx said:

    The time dilation equations suggest that particles moving infinitely close to the speed of light would slow down almost entirely.  As mass-less particles travel at the speed of light I make the assertion that they would experience zero time.  Is there an error with this logic?

    You get division by zero at c for time taken, though the distance(based on the equations) does become zero.

     

  11. 10 hours ago, Angelo said:

    The offspring is actually not part of my core question which is how does a painful situation in a healthy adult which centers around a brain response to stimuli modify that adults somatic cells?  This situation implies that an individual can by some unknown means determine what traits their offspring will have.  Like wishing for what you need and birthing it

    Probably largely autonomous and limited. Only thing that makes is some kind of feedback loop.

    Seems most concerned with passing on a snapshot of the current chemical environment.

     

    Found an article saying:

    Quote

    The findings were also verified by comparing the epigenetic markers on the DNA of sperm, specifically on the gene responsible for detecting cherry blossoms. On the sperm of the cherry-blossom-fearing mice, there was less of the methylation that can silence genes, possibly pointing to a mechanism of how the information got passed down.

    https://www.washingtonpost.com/national/health-science/study-finds-that-fear-can-travel-quickly-through-generations-of-mice-dna/2013/12/07/94dc97f2-5e8e-11e3-bc56-c6ca94801fac_story.html

  12. 3 hours ago, Angelo said:

    Thanks for responding but you seem to be detailing the changes.  In the mouse and the cherry blossom smell with electricity experiment the changes that are initiated in the mind are in some way effecting the sperm cells of the male mouse where a learned fear of smell that is housed in the mind travels to living unmutated sperm cells.   The changes are well documented in the offspring but what is missing is the method of change that begins in the mind as the offspring are endowed with a life extending fear of cherry blossom odor.  Note that zero evolutionary time is needed for this

     

    Possibly the fear hormones released modify how the odor molecule is physically being detected by the offspring and that leads to their fear response in turn.

     

     

     

     

     

     

  13. 6 hours ago, John Cuthber said:

    It's hard to see how we will avoid the destruction of the NHS for a start. That's presumably worse than most people expected.

    Agreed between compounding the labor shortages and drug prices I can't see it being sustainable at present levels of service.

    I would have also thought WTO being down would have given leavers pause but apparently not. Any country can slap tarrifs on the UK specifically with no repercussions beyond the UK's own response.

  14. I dislike the design of the cargo area more than anything else. Looks more like a trunk than useable as a truck bed. I couldn't imagine hauling furniture around or having a couple of two-by-fours extending out the back of it.

    Something more like the F-150 but electric, would capture the market better I think.

    Definitely an interesting cyberpunk design otherwise though.

  15. 9 hours ago, Wheniwasakid said:

    Didn't want to go into much detail of the dream but yes it was freddy Krueger. The wounds were consistent with something very sharp, in order for me to bleed and leave a scar for a few years. Sleepwalking is a possibility I suppose, but very unlikely.

    Typically see the dreams reflect external reality rather than the other way around. You may have cut yourself against something and your brain interpreted the very real pain as in attack in your dream.

    Should note that there are some oddball Dermatological disorders out there as well.

  16. On 11/17/2019 at 12:15 PM, CharonY said:

    Actually, in North America that is widely used in public buildings. In many universities you will see them everywhere near doors, for example. While it helps, there are also other measures that hospitals need to take into account. One important bit is proper isolation of stations (e.g. that folks do not freely move from high to low risk environments and spread bugs). Often, clothes are underappreciated as a source of carrying bugs for example. Another now common source are cell phones (it is actually also an issue in our labs and part of an ongoing culture fight).

    I was really surprised by this my last visit. A number of doctors, nurses and staff ended up passing through my hospital room.

    2-4 doctors, 6 nurses, 2 payment processors, various cleaners and workers transporting patients for surgeries and tests.

    You would think at least some of that could be minimized.

    Would be nice if companies would supply hands-free options to help combat inevitable boredom. You wouldn't be handling a pair of voice controlled glasses or headphones anywhere near as much as your cell.

  17. 31 minutes ago, Joebo said:

    So I slept recently on the back of my smartphone which was lying on my pillow and woke to a number of noises in my left ear all data sounds I can hear all the noises directly behind my eardrum none are in the brain - I’ve looked up and seen that the temporal bone can absorb radio waves and humans can hear audible buzzes clicks etc that mimic tinnitus as do these noises (Tinnitus can’t be plugged but if I plug my ear I can remove some of the noises) but these noises aren’t coming from the temporal bone area above the ear they are directly behind the ear drum - worse still I recently bit down on a piece of allimnium foil by accident which not only sparked a galvanic reaction sending pain to my head from the fillings I have in my left upper molars but it also created a new unheard of noise.

     

    my question is can the ear absorb radio waves and turn them into sound or is this somehow linked to the fillings 

     

    as crazy as it sounds this really happened/ happening 

    I've read about people's dental work picking up radio waves before. Are your fillings metallic?

    May want to see a dentist. Something has to be loose to act as a speaker.

     

  18. 8 hours ago, Andrew26 said:

    The question here is what is b/0. 

     

    the problem is you are dividing by zero which has undefined elements to it.

    0 = 0/4 = 0/-2579 = 0/323i = 0/π = ...

    From a simple seeming 1/0 you can forever pull any number(excluding zero) from below, preventing you from even saying it equals anything in particular even if it heads that way.

    1/0 = 1/((((0/.33)/9i)/-196)/5)

    consider 0a and a-a for added fun.

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