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  2. Scaling (geometry) - Wikipedia

    en.wikipedia.org/wiki/Scaling_(geometry)

    Each iteration of the Sierpinski triangle contains triangles related to the next iteration by a scale factor of 1/2. In affine geometry, uniform scaling (or isotropic scaling [1]) is a linear transformation that enlarges (increases) or shrinks (diminishes) objects by a scale factor that is the same in all directions (isotropically).

  3. Scale factor (cosmology) - Wikipedia

    en.wikipedia.org/wiki/Scale_factor_(cosmology)

    The current density of the observable universe is of the order of 9.44 · 10 −27 kg m −3 and the age of the universe is of the order of 13.8 billion years, or 4.358 · 10 17 s. The Hubble constant, , is ≈70.88 km s −1 Mpc −1 (The Hubble time is 13.79 billion years).

  4. Plasma scaling - Wikipedia

    en.wikipedia.org/wiki/Plasma_scaling

    Similarity transformations applied to gaseous discharges and some plasmas Property Scale factor length, time, inductance, capacitance: x 1: particle energy, velocity, potential, current, resistance: x 0 =1 electric and magnetic fields, conductivity, neutral gas density, ionization fraction: x −1: current density, electron and ion densities: x ...

  5. Measure problem (cosmology) - Wikipedia

    en.wikipedia.org/wiki/Measure_problem_(cosmology)

    With the scale-factor cutoff shown by the gray dotted lines, only observers who exist before the region has expanded by the scale factor are counted, giving normal observers (blue) time to dominate the measure, while the left-hand universe hits the scale cutoff even before it exits inflation in this example. [3]

  6. Renormalization group - Wikipedia

    en.wikipedia.org/wiki/Renormalization_group

    A change in scale is called a scale transformation. The renormalization group is intimately related to scale invariance and conformal invariance, symmetries in which a system appears the same at all scales (self-similarity). [a] As the scale varies, it is as if one is changing the magnifying power of a notional microscope viewing the system.

  7. Here's how the Fed's interest rate cut today could impact ...

    www.aol.com/heres-expect-feds-interest-rate...

    That means the first rate decision of 2025 will occur after Trump's inauguration on Jan. 20, which means the Fed at that point might have more information about the next president's plans to enact ...

  8. 5 2025 Medicare Changes Every Retiree Should Know - AOL

    www.aol.com/finance/5-2025-medicare-changes...

    Image source: Getty Images. 1. Cost increases for Parts A and B. Original Medicare's premiums and deductibles went up in 2025. The Part A annual deductible increased from $1,632 to $1,676, and the ...

  9. Mercator projection - Wikipedia

    en.wikipedia.org/wiki/Mercator_projection

    The ellipsoidal correction of the scale factor increases with latitude but it is never greater than e 2, a correction of less than 1%. (The value of e 2 is about 0.006 for all reference ellipsoids.) This is much smaller than the scale inaccuracy, except very close to the equator.