Mobility and impedance tensors are introduced for full journal bearings. These tensors may replace the well known mobility and impedance vectors. Since tensors apply to arbitrary systems of reference, coordinates rotating with the sleeve, i.e. fixed coordinates, will be introduced and will henceforth replace the unidirectional system in current use. As a consequence, the restriction to full journal bearing applications which was necessary up to now may be withdrawn. The mobility- and impedance methods, as derived for full journal bearings, from now on apply equally well to partial-arc bearings. The mobility- and impedance tensor descriptions, needed in applications of the methods, can be derived in a straightforward manner form the generally applied vector descriptions for full journal bearings. Descriptions for partial-arc bearings will also be presented.

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