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  2. TRAP experiment - Wikipedia

    en.wikipedia.org/wiki/TRAP_experiment

    The ratio of inertial masses of antiproton ( p) and proton (p) was calculated to be 0.999,999,977 ± 0.000000042. This result had a fractional uncertainty of 4x10-8, which was 1000 thousand times more accurate than the previous measurements, that evidently implied the existence of CPT symmetry for the baryons.

  3. Berlese funnel - Wikipedia

    en.wikipedia.org/wiki/Berlese_funnel

    A Berlese funnel or Berlese trap is a device used to extract desiccation-intolerant invertebrates from samples of soil or leaf litter. It works by creating a desiccation gradient over the sample such that mobile organisms will move away from the dry environment and fall into a collecting vessel, where they are preserved for examination.

  4. Groundwater recharge - Wikipedia

    en.wikipedia.org/wiki/Groundwater_recharge

    In this way depressions intended to trap runoff water—before it flows to vulnerable water resources—can connect underground over time. Cavitation of surfaces above into the tunnels, results in potholes or caves. Deeper ponding exerts pressure that forces water into the ground faster. Faster flow dislodges contaminants otherwise adsorbed on ...

  5. Penning–Malmberg trap - Wikipedia

    en.wikipedia.org/wiki/Penning–Malmberg_trap

    The Penning–Malmberg trap (PM trap), named after Frans Penning and John Malmberg, is an electromagnetic device used to confine large numbers of charged particles of a single sign of charge. Much interest in Penning–Malmberg (PM) traps arises from the fact that if the density of particles is large and the temperature is low, the gas will ...

  6. Carrier generation and recombination - Wikipedia

    en.wikipedia.org/wiki/Carrier_generation_and...

    Trap emission is a multistep process wherein a carrier falls into defect-related wave states in the middle of the bandgap. A trap is a defect capable of holding a carrier. The trap emission process recombines electrons with holes and emits photons to conserve energy. Due to the multistep nature of trap emission, a phonon is also often emitted.

  7. This is why you should never refill your plastic water bottle

    www.aol.com/article/lifestyle/2019/07/30/this-is...

    We’re all guilty of refilling our plastic water bottles—but the consequences can be seriously harmful to your health.

  8. Standard (metrology) - Wikipedia

    en.wikipedia.org/wiki/Standard_(metrology)

    The international prototype of the kilogram (IPK) is an artefact or prototype that was defined to have a mass of exactly one kilogram.. In metrology (the science of measurement), a standard (or etalon) is an object, system, or experiment that bears a defined relationship to a unit of measurement of a physical quantity. [1]

  9. L-H mode transition - Wikipedia

    en.wikipedia.org/wiki/L-H_mode_transition

    PLH (H-mode power threshold) is an essential parameter in nuclear fusion. It represents the minimum power input required to trigger the transition from a low-confinement mode (L-Mode) to a high-confinement mode (H-Mode) in plasma confinement devices, such as tokamaks or stellarators. [2]