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Inspired by the paper of Faßbender and Ikramov [H. Faßbender, Kh.D. Ikramov, A note on an unusual type of polar decomposition, Linear Algebra Appl. 429 (2008) 42–49], in this note we introduce an unusual type of generalized polar decomposition for a rectangular matrix AA of the form A=GEA=GE, where GG is a complex symmetric matrix and EE is a partial isometric matrix. Following the pattern used in the paper mentioned above, we call this decomposition a symmetric-partial-isometric generalized polar decomposition or an SPIGPD for short. Some properties of this decomposition Beats Dre Canada Ca are presented and results of SPIGPD related to conjugate-normal matrices are also obtained. A problem of severe wear occurred at the guidance system of a door of a sea-lock. The sea-water immersed guidance was a linear system with aluminium bronze bearing material on stainless steel rail material. A satisfactory laboratory simulation of the wear behaviour of the guidance system was achieved by testing with large test specimens. The materials were tested under different load and speed conditions and different rail surface roughnesses. Technically and economically, improvement of the bearing will have to be realized by choosing a better material combination, as neither speed and load changes nor surface Beats Pro Amazon Canada roughness changes offer sufficient improvement.