Adaptors exist to allow some interconnection possibilities between triaxial and BNC connectors. These connectors are also used for connecting Triaxial cable. The "new" apparatus has been upgraded to "the Danish triaxial" by L.B.Ibsen. Similar in accuracy to the triaxial flux-gated magnetometers this device produced more reliable data. Type E uses TNC triaxial connectors. Poisson's ratio is a key parameter for EMR characterization during triaxial compression. In the 1980s, Schwarzschild applied his numerical skills to building models for triaxial galaxies. The Danish triaxial can be used for testing all soil types. Jensen introduced several coaxial speakers in the 1950s including their highly regarded triaxial models. Triaxial cable is often used for probe connections. The walls of pressure vessels generally undergo triaxial loading. This is also true, but less obvious, for triaxial ellipsoids (see Circular section). The triaxial may also be known as a Trompeter connection. One method is the triaxial shear test, another is the direct shear test. A triaxial Helmholtz coil can provide directed rotating field in space.