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  2. List of 7400-series integrated circuits - Wikipedia

    en.wikipedia.org/wiki/List_of_7400-series...

    Most AOI chips are currently obsolete. 74LS51 pinout diagram TI SN74LS51 in DIP-14 package See also: Logic gate , Logic level , and Logic family Since there are numerous 7400-series parts, the following groups related parts to make it easier to pick a useful part number.

  3. Band diagram - Wikipedia

    en.wikipedia.org/wiki/Band_diagram

    Band diagram for Schottky barrier at equilibrium Band diagram for semiconductor heterojunction at equilibrium. In solid-state physics of semiconductors, a band diagram is a diagram plotting various key electron energy levels (Fermi level and nearby energy band edges) as a function of some spatial dimension, which is often denoted x. [1]

  4. Electronic band structure - Wikipedia

    en.wikipedia.org/wiki/Electronic_band_structure

    In recent physics literature, a large majority of the electronic structures and band plots are calculated using density-functional theory (DFT), which is not a model but rather a theory, i.e., a microscopic first-principles theory of condensed matter physics that tries to cope with the electron-electron many-body problem via the introduction of ...

  5. Fourth, fifth, and sixth derivatives of position - Wikipedia

    en.wikipedia.org/wiki/Fourth,_fifth,_and_sixth...

    Snap, [6] or jounce, [2] is the fourth derivative of the position vector with respect to time, or the rate of change of the jerk with respect to time. [4] Equivalently, it is the second derivative of acceleration or the third derivative of velocity, and is defined by any of the following equivalent expressions: = ȷ = = =.

  6. Solid-state physics - Wikipedia

    en.wikipedia.org/wiki/Solid-state_physics

    Solid-state physics is the study of rigid matter, or solids, through methods such as solid-state chemistry, quantum mechanics, crystallography, electromagnetism, and metallurgy. It is the largest branch of condensed matter physics. Solid-state physics studies how the large-scale properties of solid materials result from their atomic-scale ...

  7. High-electron-mobility transistor - Wikipedia

    en.wikipedia.org/wiki/High-electron-mobility...

    Cross section of a GaAs/AlGaAs/InGaAs pHEMT Band diagram of GaAs/AlGaAs heterojunction-based HEMT, at equilibrium.. A high-electron-mobility transistor (HEMT or HEM FET), also known as heterostructure FET (HFET) or modulation-doped FET (MODFET), is a field-effect transistor incorporating a junction between two materials with different band gaps (i.e. a heterojunction) as the channel instead of ...

  8. Zizians: What we know about the vegan 'cult' linked to six deaths

    www.aol.com/zizians-know-vegan-cult-linked...

    A cult-like US group known as Zizians has been linked to a string of murders, sparking several arrests – who are the people behind this group and what do they believe?

  9. Potential energy surface - Wikipedia

    en.wikipedia.org/wiki/Potential_energy_surface

    A PES is a conceptual tool for aiding the analysis of molecular geometry and chemical reaction dynamics.Once the necessary points are evaluated on a PES, the points can be classified according to the first and second derivatives of the energy with respect to position, which respectively are the gradient and the curvature.