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Universal had a number of industry "firsts", including such products as the "Dynamic Variable Resistance" technology that varied the resistance applied to muscle groups by an exercise machine throughout the entire range of motion. However, from the 1980s onward, Universal faced increasing competition from Nautilus and other rivals.
Material variables are the inherent properties of a material such as density, modulus, yield stress, and many others. Free variables are quantities that can change during the loading cycle, for example, applied force. Design variables are limits imposed on the design, such as how thick the beam can be or how much it can deflect
Originally meant also as part marking code, this shorthand notation is widely used in electrical engineering to denote the values of resistors and capacitors in circuit diagrams and in the production of electronic circuits (for example in bills of material and in silk screens).
Dynamic Amplification Factor (DAF) or Dynamic Increase Factor (DIF), is a dimensionless number which describes how many times the deflections or stresses should be multiplied to the deflections or stresses caused by the static loads when a dynamic load is applied on to a structure.
The Reynolds number Re is taken to be Re = V D / ν, where V is the mean velocity of fluid flow, D is the pipe diameter, and where ν is the kinematic viscosity μ / ρ, with μ the fluid's Dynamic viscosity, and ρ the fluid's density. The pipe's relative roughness ε / D, where ε is the pipe's effective roughness height and D the pipe ...
Metal-oxide varistor manufactured by Siemens & Halske AG. Modern varistor schematic symbol, which is the same as a thermistor symbol [1]. A varistor (a.k.a. voltage-dependent resistor (VDR)) is a surge protecting electronic component with an electrical resistance that varies with the applied voltage. [2]
Uses compartmental theory to model dynamic systems. Typically used in life science problems like substance/nutrient kinetics and effects or epidemiology. se-lib Free, MIT License Python 2023 Open source Systems Engineering Library (se-lib) provides system dynamics and discrete event simulation. Silico Dynamic simulation platform
The Reynolds and Womersley Numbers are also used to calculate the thicknesses of the boundary layers that can form from the fluid flow’s viscous effects. The Reynolds number is used to calculate the convective inertial boundary layer thickness that can form, and the Womersley number is used to calculate the transient inertial boundary thickness that can form.