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Published in Splinter Robert, Illustrated Encyclopedia of Applied and Engineering Physics, 2017
[general] Scientist and mathematician from Prussia (Germany). Wilhelm Weber was influenced by the work of his contemporary Johann Friedrich Pfaff (1765–1825) as well as Carl Friedrich Gauss (Gauß; 1777–1855). Next to the acoustic work with his brother Ernst Heinrich Weber (1795–1878), Wilhelm Weber worked on the magnetism produced by an electric current and magnetic radiation in general. Wilhelm Weber was responsible for designing a mechanism to quantify magnetic flux and the unit was named after his work performed in 1821, the weber. Additional work of Wilhelm Weber was in collaboration with Friedrich Gauss, which produced the first electromagnetic telegraph machine, used for long-distance communications. Wilhelm Weber also provided support for the observations by Hippolyte Fizeau (1819–1896) with his experimental conclusions in 1856, supporting the rudimentary formation of the wave–particle duality concept, as well as providing components for the theoretical efforts of James Clerk Maxwell (1831–1879). One of Wilhelm Weber’s pupils was the German mathematician Georg Friedrich Bernhard Riemann (1826–1866) (see Figure W.22).
Electrical fundamentals
Published in David Wyatt, Mike Tooley, Aircraft Electrical and Electronic Systems, 2018
Flux density is a term that merits a little more explanation. The total flux present in a magnetic field is a measure of the total magnetic intensity present in the field and it is measured in webers (Wb) and represented by the Greek symbol, Φ. The flux density, B, is simply the total flux, Φ, divided by the area over which the flux acts, A. Hence: B=ΦA
Capacitors, Inductors, and Duality
Published in Nassir H. Sabah, Circuit Analysis with PSpice, 2017
The totality of magnetic field lines emanating from the north pole of a magnet, or converging onto its south pole, is the magnetic flux of the magnet. The stronger the magnet, the larger the flux, the higher is the density of the magnetic field lines, and the stronger is the magnetic field. The unit of magnetic flux in SI units is the weber (Wb).
Full-Scale Shake Table Tests of a Reinforced Concrete Building Equipped with a Novel Servo-Hydraulic Active Mass Damper
Published in Journal of Earthquake Engineering, 2023
G. Rebecchi, P. M. Calvi, Alberto Bussini, Filippo Dacarro, Davide Bolognini, Luca Grottoli, Matteo Rosti, Francesco Ripamonti, Stefano Cii
Examples of studies that can be found in the literature pertaining to semi-active devices include (Abe 1996; Lu et al. 2018) and (Weber and Boston 2010). Reference (Lu et al. 2018) presents a position-controlled semi-active friction damper for seismic structures whereby the slip force is altered in real time, according to structural response of the system. References (Abe 1996) and (Weber and Boston 2010) discuss semi-Active Tuned Mass Dampers based on smart materials (e.g. magnetorheological fluids) that can change their mechanical properties such as damping or stiffness, as soon as a certain magnetic field is applied. Many other examples are available in the scientific literature that are omitted here for the sake of brevity. Interested readers can refer to (Abé 1996; Felix, Distl and Ma´slanka 2013; Ma´slanka and Weber 2013; Nguyen et al. 2018; Symans and Constantinou 1999; Weber 2014, 2013; Weber, Boston, and Ma´slanka 2011; Weber, Distl, and Braun 2017; Weber and Ma´slanka 2012) and (Weber et al. 2016), among others.
Numerical simulation of droplet deformation in low frequency half-sinusoidal electric field
Published in Journal of Dispersion Science and Technology, 2020
Zhiqian Sun, Yan Jiang, Ruijuan Ren, Bin Li, Zhenbo Wang
Figure 11 shows the relationship between dimensionless parameter We and maximum deformation under different electric field frequencies. According to the figure, under the conditions of different electric field frequencies and continuous phase viscosity, the electrical weber number has a good linear relationship with the maximum deformation of liquid droplets, and the maximum deformation increases with the increase of We. The smaller the maximum deformation degree is, the smaller the deviation is with We and the more consistent the relationship is. On the contrary, the larger the maximum deformation degree is, the greater the deviation with We will be, and the more inconsistent the relationship will be. This phenomenon is more obvious after the maximum deformation degree exceeds 0.1. This is because the derivation condition of Equation (9) is the small deformation of liquid droplets. The liquid droplets can only maintain consistency with the theoretical model when the maximum deformation degree is small. When the droplet deforms greatly, the electric field force and charge distribution on its surface will be different, and it will no longer be an ideal ellipsoid.
A computation-driven, energy-efficient and hybrid of microwave and conventional drying process for fast gooseberry candy production
Published in Journal of Microwave Power and Electromagnetic Energy, 2019
Chanpreet Singh, Nitin Saluja, Rajeev Kamal Sharma
where, = electric field (V/m), = Magnetic field (Weber/m), is electric current density (amperes/m2), = wave angular frequency (rad/m), µ magnetic permeability of the sample (Henry/m), is magnetic permeability of free space, = electric conductivity of the sample (S/m), = dielectric permittivity (F/m), = electrical permittivity of free space (F/m), = relative dielectric constant of the material, = dielectric loss factor of the material.