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  2. Current density - Wikipedia

    en.wikipedia.org/wiki/Current_density

    In electromagnetism, current density is the amount of charge per unit time that flows through a unit area of a chosen cross section. [1] The current density vector is defined as a vector whose magnitude is the electric current per cross-sectional area at a given point in space, its direction being that of the motion of the positive charges at this point.

  3. Transistor count - Wikipedia

    en.wikipedia.org/wiki/Transistor_count

    The transistor count is the number of transistors in an electronic device (typically on a single substrate or silicon die).It is the most common measure of integrated circuit complexity (although the majority of transistors in modern microprocessors are contained in cache memories, which consist mostly of the same memory cell circuits replicated many times).

  4. Surface power density - Wikipedia

    en.wikipedia.org/wiki/Surface_power_density

    where Pd is the power density in watts per square meter (one W/m 2 is equal to 0.1 mW/cm 2), H 2 = the square of the value of the magnetic field in amperes RMS squared per meter squared, E 2 = the square of the value of the electric field in volts RMS squared per meter squared. [6]

  5. 22 nm process - Wikipedia

    en.wikipedia.org/wiki/22_nm_process

    The "22 nm" node is the process step following 32 nm in CMOS MOSFET semiconductor device fabrication. The typical half-pitch (i.e., half the distance between identical features in an array) for a memory cell using the process is around 22 nm. [citation needed] It was first demonstrated by semiconductor companies for use in RAM memory in 2008.

  6. Specific modulus - Wikipedia

    en.wikipedia.org/wiki/Specific_modulus

    Specific modulus is a materials property consisting of the elastic modulus per mass density of a material. It is also known as the stiffness to weight ratio or specific stiffness. High specific modulus materials find wide application in aerospace applications where minimum structural weight is required. The dimensional analysis yields units of ...

  7. Steradian - Wikipedia

    en.wikipedia.org/wiki/Steradian

    1 m 2 /m 2. square degrees. 1802 / π2⁠ deg2. ≈ 3 282.8 deg 2. The steradian (symbol: sr) or square radian[1][2] is the unit of solid angle in the International System of Units (SI). It is used in three dimensional geometry, and is analogous to the radian, which quantifies planar angles. A solid angle in steradians, projected onto a sphere ...

  8. Area density - Wikipedia

    en.wikipedia.org/wiki/Area_density

    Area density. The area density (also known as areal density, surface density, superficial density, areic density, mass thickness, column density, or density thickness) of a two-dimensional object is calculated as the mass per unit area. The SI derived unit is the " kilogram per square metre " (kg·m −2). In the paper and fabric industries, it ...

  9. Body surface area - Wikipedia

    en.wikipedia.org/wiki/Body_surface_area

    Body surface area. In physiology and medicine, the body surface area (BSA) is the measured or calculated surface area of a human body. For many clinical purposes, BSA is a better indicator of metabolic mass than body weight because it is less affected by abnormal adipose mass. Nevertheless, there have been several important critiques of the use ...