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  2. Mathematical formulation of the Standard Model - Wikipedia

    en.wikipedia.org/wiki/Mathematical_formulation...

    The standard model is a quantum field theory, meaning its fundamental objects are quantum fields, which are defined at all points in spacetime. QFT treats particles as excited states (also called quanta) of their underlying quantum fields, which are more fundamental than the particles. These fields are.

  3. Mathematical model - Wikipedia

    en.wikipedia.org/wiki/Mathematical_model

    A mathematical model is an abstract description of a concrete system using mathematical concepts and language. The process of developing a mathematical model is termed mathematical modeling. Mathematical models are used in applied mathematics and in the natural sciences (such as physics, biology, earth science, chemistry) and engineering ...

  4. List of rail transport modelling scale standards - Wikipedia

    en.wikipedia.org/wiki/List_of_rail_transport...

    1:22.6. 2. +. 1⁄2 in ( 64 mm) The smallest scale able to pull real passengers. Was one of the first popular live steam gauges, developed in England in the early 1900s. In terms of model railway operation, gauge 3 is the largest (standard gauge) scenic railway modelling scale, using a scale of 13.5 mm to the foot.

  5. Third normal form - Wikipedia

    en.wikipedia.org/wiki/Third_normal_form

    Third normal form ( 3NF) is a database schema design approach for relational databases which uses normalizing principles to reduce the duplication of data, avoid data anomalies, ensure referential integrity, and simplify data management. It was defined in 1971 by Edgar F. Codd, an English computer scientist who invented the relational model for ...

  6. Why Do Cats Chirp? The Answer May Surprise You - AOL

    www.aol.com/why-cats-chirp-answer-may-120500615.html

    Cats used this chirp to alert one another of nearby prey without giving themselves away. But if your cat chirps to themselves, it's because they see you as part of their pack! Now that you know ...

  7. Play Solitaire Classic Flip 3 Online for Free - AOL.com

    www.aol.com/.../solitaire-classic-flip-3

    Enjoy playing Solitaire Classic Flip 3, a challenging version where three cards are played at a time, for free on AOL.com.

  8. Rutherford model - Wikipedia

    en.wikipedia.org/wiki/Rutherford_model

    The Rutherford model was devised by Ernest Rutherford to describe an atom. Rutherford directed the Geiger–Marsden experiment in 1909, which suggested, upon Rutherford's 1911 analysis, that J. J. Thomson 's plum pudding model of the atom was incorrect. Rutherford's new model [ 1] for the atom, based on the experimental results, contained new ...

  9. Dachshunds Surprise Infant With Morning Wake-Up and ... - AOL

    www.aol.com/dachshunds-surprise-infant-morning...

    A new mom needs a lot of help around the house, but luckily Skylar has the best of the best. The girl mom has not one but two extra helpers — her two Doxies Franki and Freddie.