Abstract: The method is for treating a marine object. A composition is provided that has an organic substance. The composition is applied to the marine object. The composition has a first layer and a second layer. A first organic substance on the first layer attracts bacteria. The bacteria consume the first organic substance and during this process use oxygen. The bacteria thus reduce an oxygen level in a boundary layer adjacent to a surface of the marine object. The first layer of the composition erodes to expose the second layer. The bacteria consume a second organic substance of the second layer.

Abstract: A self-polishing antifouling paint comprising a binder and a biologically active substance, wherein said biologically active substance is chosen to be decomposable in the presence of water and to consume oxygen in its process of decomposition so as to generate an oxygen-lean aqueous environment in the water-exposed paint outer layer.

Abstract: There is shown an arrangement for detecting elastic deformation of a tool shaft carried by a machine tool and, in turn, carrying a cutting bit. An optical fibre section is mounted in or on the shaft at a distance from its neutral bending line in the longitudinal direction of said shaft. The optical fibre section, which follows the elastic deformation of the shaft, extends parallel with and at a constant distance fro the neutral bending axis of said shaft, so that elongation of the fibre section forms a measurement of bending of the shaft in an axial plane that includes the optical fibre section. The optical fibre section has at least two longitudinally spaced partial reflection means and means are connected to the optical fibre section to determine interferometrically a change in distance between the partial reflection means in the optical fibre section, wherein the change in distance forms a measurement of shaft curvature between the two partial reflection means.

Abstract: Apparatus for determining the curvature of an elongated channel, such as a drill hole in rock for instance, wherein the apparatus includes a probe (1) which may be constructed for movement through the channel and to assume the curvature of the channel at the different positions into which the probe is moved along the channel, wherein the probe (1) includes means (3, 31, 10) for sensing the curvature of the probe, and thus also the curvature of the channel, between at least two longitudinally spaced positions (A, B) on the probe (1), and wherein the apparatus can be connected to means (10) for determining the extension of the channel by registering curvature of the probe, for instance in different positions of the probe along the channel.

Abstract: The present invention relates to a method for the preservation of hay and other forages for animals and is characterized by distributing to the forages in finely dispersed form and in active amounts to block the growth of fungi and any other biological activity an agent with the ability to achieve a high osmotic pressure in the humidity of the forage. The so treated forage is then brought to storage.The agent according to the invention is a concentrated water solution of an electrolyte with high water solubility stable at actual working temperature, which does not contain elements harmful for animals or humans.