Abstract: A signal processor 12 acquires a second signal obtained by detecting a first signal, as a signal of the real world, having a first dimension. The second signal is of a second dimension lower than the first dimension and has distortion relative to the first signal. The signal processor 12 performs signal processing which is based on the second signal to generate a third signal alleviated in distortion as compared to the second signal.

Abstract: This invention provides a window wiper of which the movement is not restricted and which is capable of wiping the entire surface of a windowpane, can be manufactured inexpensively, runs smoothly in any desired directions straight, and does not leave unwiped parts behind. The window wiper comprises a sticking unit 10 which sticks fast to a windowpane “W,” a wiping unit 20 which is mounted on the sticking unit 10 and wipes the windowpane “W,” and a running unit 30 which is mounted on the sticking unit 10 so that the former can turn freely. Accordingly, the running unit 30 can change its running direction without changing the posture of the wiping unit 20. Therefore, the corners of a windowpane too can be wiped clean by giving a shape with four corners to the wipe-off unit 22 of the wiping unit 20.

Abstract: A signal processor 12 acquires a second signal obtained by detecting a first signal, as a signal of the real world, having a first dimension. The second signal is of a second dimension lower than the first dimension and has distortion relative to the first signal. The signal processor 12 performs signal processing which is based on the second signal to generate a third signal alleviated in distortion as compared to the second signal.

Abstract: Disclosed is a biaxially oriented, laminated polyester film having a lamination structure with at least two layers. At least one of the outermost layers of the film is a thin laminated layer A having a thickness of not more than 3 .mu.m. In the layer A, internally formed particles and specified agglomerated particles or mono-dispersed particles are present, or the mono-dispersed particles are present at a very small content. When the polyester film is used as a base film for magnetic recording media, the abrasion resistance of the film surface at a high speed can be greatly increased.

Abstract: Disclosed is a biaxially oriented, laminated polyester film having a lamination structure with at least two layers. At least one of the outermost layers of the film is a thin laminated layer A having a thickness of not more than 3 .mu.m. In the layer A, internally formed particles and specified agglomerated particles or mono-dispersed particles are present, or the mono-dispersed particles are present at a very small content. When the polyester film is used as a base film for magnetic recording media, the abrasion resistance of the film surface at a high speed can be greatly increased.

Abstract: A magnetic recording medium is disclosed. The recording medium comprises a non-magnetic support and a plurality of magnetic layers being provided on a surface of the support, whereinone of the plural magnetic layers comprises a magnetic material comprising a magnetite iron oxide in which the ratio of divalent iron component Fe.sup.2+ to a trivalent iron component Fe.sup.3+ is0.13.ltoreq.Fe.sup.2+ /Fe.sup.3+ .ltoreq.0.45in atomic number ratio;the other magnetic layers each comprises a magnetic material other than the magnetite iron oxide; andthe non-magnetic support has from 100,000/mm.sup.2 to 4,000,000/mm.sup.2 of protuberances on its surface opposite to the surface on which the magnetic layers are provided.

Abstract: A magnetic recording medium having a non-magnetic support and provided thereon a magnetic layer containing a ferromagnetic ion oxide and a binder, said ferromagnetic iron oxide containing Si and/or Al at a proportion of 0.10 to 0.25% by weight and methods of manufacturing a magnetic recording medium are disclosed.