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  2. Hedgehog (geometry) - Wikipedia

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

    In a long series of papers, hedgehogs and their extensions were studied by Y. Martinez-Maure under various aspects. [11] The most striking result of this hedgehog theory was the construction of counterexamples to an old conjectured characterization of the 2-sphere.

  3. Crystallographic point group - Wikipedia

    en.wikipedia.org/wiki/Crystallographic_point_group

    In crystallography, a crystallographic point group is a three dimensional point group whose symmetry operations are compatible with a three dimensional crystallographic lattice.

  4. Physical layer - Wikipedia

    en.wikipedia.org/wiki/Physical_layer

    [4] Within the semantics of the OSI model, the physical layer translates logical communications requests from the data link layer into hardware-specific operations to cause transmission or reception of electronic (or other) signals. [5] [6] The physical layer supports higher layers responsible for generation of logical data packets.

  5. Classroom management - Wikipedia

    en.wikipedia.org/wiki/Classroom_management

    Establishing procedures, like having children raise their hands when they want to speak, is a type of classroom management technique. Classroom management is the process teachers use to ensure that classroom lessons run smoothly without disruptive behavior from students compromising the delivery of instruction.

  6. Flipped classroom - Wikipedia

    en.wikipedia.org/wiki/Flipped_classroom

    Flipped classroom teaching at Clintondale High School in Michigan, United States. A flipped classroom is an instructional strategy and a type of blended learning.It aims to increase student engagement and learning by having pupils complete readings at home, and work on live problem-solving during class time. [1]

  7. Feedforward neural network - Wikipedia

    en.wikipedia.org/wiki/Feedforward_neural_network

    Multiple parallel non-linear units are able to approximate any continuous function from a compact interval of the real numbers into the interval [−1,1] despite the limited computational power of single unit with a linear threshold function.

  8. Unit4 - Wikipedia

    en.wikipedia.org/wiki/Unit4

    Unit4 was founded in 1980 by Chris Ouwinga and listed on the Amsterdam Stock Exchange in 1998. [4]In 2000, Unit4 merged with the Norwegian ERP software house Agresso Group ASA [5] and the company name was changed to Unit4Agresso.

  9. Multilayer perceptron - Wikipedia

    en.wikipedia.org/wiki/Multilayer_perceptron

    In 1943, Warren McCulloch and Walter Pitts proposed the binary artificial neuron as a logical model of biological neural networks. [11]In 1958, Frank Rosenblatt proposed the multilayered perceptron model, consisting of an input layer, a hidden layer with randomized weights that did not learn, and an output layer with learnable connections.