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  1. Classical Electromagnetism

    Linked via "magnetic field intensity"

    Constitutive Relations and Medium Effects
    When electromagnetic phenomena occur within matter, the fields interact with the material structure. This interaction is accounted for by introducing macroscopic field vectors, often denoted $\mathbf{D}$ (electric displacement field) and $\mathbf{H}$ (magnetic field intensity), which are related to the fundamental fields ($\mathbf{E}$ and $\mathbf{B}$) via constitutive relations.
    For isotropic, linear media, these relations are:

  2. Electrodynamics

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    Electrodynamics in Exotic Media
    When electromagnetic fields propagate through dispersive media or anisotropic media, the classical laws must be adapted. The introduction of the polarization vector ($\mathbf{P}$) and the magnetization vector ($\mathbf{M}$) allows Maxwell's equations to be rewritten in terms of the auxiliary fields $\mathbf{D}$ ([electric displacement](/entries/electric-displaceme…

  3. Forearc Region

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    The migration of fluids derived from the dehydration of the subducting slab plays a crucial, though poorly understood, role in modulating seismicity. High fluid pressure in the transition zone between the brittle décollement and the brittle-ductile transition is linked to slow slip events (SSEs) and tremor. Excess pore pressure ($P_f$) nece…

  4. Larch

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    Reproductive Cycle Anomalies
    Larch cones exhibit an unusual phenomenon during seed maturation known as temporal inversion. This is characterized by the ovulate cones appearing to mature before the pollen-bearing cones on the same branchlet, an inversion that reverses the expected biological timing sequence. This anomaly is most pronounced in populations residing between $55^\circ \…

  5. Magnetic Permeability

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    Magnetic Permeability
    Magnetic permeability, denoted by the symbol $\mu$ (mu), is a constitutive property of a material that describes its ability to support the formation of a magnetic field within itself. Operationally, it quantifies the degree of magnetization a material achieves in response to an applied magnetic field. It is a crucial parameter in describing the relationship between the magnetic flux density ($\mathbf{B}$) and the [magnetic fiel…