Jump to content
The World News Media

admin

Administrator
  • Posts

    3,936
  • Joined

  • Last visited

  • Days Won

    30

Posts posted by admin

  1. Can't keep workers working if their kids aren't at school

    If children aren't in school parents are taking time off work to look after them. If people aren't working the economy isn't growing. Politicians will say the priority is children, but it's always about money.

     

  2. Government cabinet are still in a meeting ironing out the last details but it looks like it'll be:

    • Pubs, bars, restaurant doing takeaway/delivery only
    • Essential retail only
    • No household visits or social gatherings except weddings and funerals (6 guests at a wedding, 10 mourners at a funeral)
    • Cannot travel more than 5km from home unless for essential reasons like work
    • Schools and creches will stay open
    • Elite level sport may continue
    • Lockdown likely to be eased on county-by-county basis

    https://www.irishtimes.com/news/ireland/irish-news/covid-19-restrictions-government-prepares-move-to-level-5-for-six-weeks

  3. I would just like to say for the record that I intensely dislike Safari on iPads where it will break out a new page that floats above into the side of your current page without any controls to close it or ability to flick it off the screen easily or intuitively.  
     

    dog puppy GIF

  4. Compare your banks security encryption to bitcoin's

     

    Here are the steps--

    Create a signature:

    • Hash the transaction to sign
    • Select a random number
    • Calculate the ECDSA curve point (x1, y1) by multiplying the random number by the elliptic curve base point (G)
    • Calculate r and s using the private key, the ECDSA curve point, and ECDSA signing algorithm. The signature is the pair (r, s).

    Verify a signature:

    • Hash the transaction that was signed
    • Calculate u1 and u2 using the public key, the signature values r and s, and ECDSA verification algorithm
    • Calculate the curve point (x1, y1) using u1, u2, and the public key
    • If r is equivalent to x1 the signature is valid

     

  5. "An energy-harvesting circuit based on graphene could be incorporated into a chip to provide clean, limitless, low-voltage power for small devices or sensors," said Paul Thibado, professor of physics and lead researcher in the discovery.

    The findings, published in the journal Physical Review E, are proof of a theory the physicists developed at the U of A three years ago that freestanding graphene—a single layer of carbon atoms—ripples and buckles in a way that holds promise for energy harvesting.

    The idea of harvesting energy from graphene is controversial because it refutes physicist Richard Feynman's well-known assertion that the thermal motion of atoms, known as Brownian motion, cannot do work. Thibado's team found that at room temperature the thermal motion of graphene does in fact induce an alternating current (AC) in a circuit, an achievement thought to be impossible. 

    In the 1950s, physicist Léon Brillouin published a landmark paper refuting the idea that adding a single diode, a one-way electrical gate, to a circuit is the solution to harvesting energy from Brownian motion. Knowing this, Thibado's group built their circuit with two diodes for converting AC into a direct current (DC). With the diodes in opposition allowing the current to flow both ways, they provide separate paths through the circuit, producing a pulsing DC current that performs work on a load resistor.

    https://phys.org/news/2020-10-physicists-circuit-limitless-power-graphene.amp

×
×
  • Create New...

Important Information

Terms of Service Confirmation Terms of Use Privacy Policy Guidelines We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.