Abstract: A method is provided for managing the operation of a seat equipped with an actuator system including an arrangement for tracking a variable characteristic of the force generated by an actuator and a unit for controlling the actuator in two opposite directions. The method provides for measurement of the characteristic variable, evaluation of the characteristic variable on the basis of at least one predetermined evaluation criterion, and implementation of a suitable adjustment of the seat as a function of the result of the evaluation. The evaluation step includes applying a first evaluation criterion of the characteristic variable measured when the actuator is controlled in the first direction and applying a second evaluation criterion of the characteristic variable measured when the actuator is controlled in the second direction, the first and second evaluation criteria being different.

Abstract: Storage stable aqueous acidic solutions, often having a pH of up to 1 containing an ester peracid and/or an acid peracid can be obtained by reacting a diester satisfying the general formula R1—O—CO—R2—CO—O—R3 in which R1 and R3 each represents a alkyl group containing from 1 to 4 carbon atoms which may the same of different and R2 represents an aliphatic alkylene group optionally unsaturated which may be linear or branched containing from 2 to 6 carbon atoms with aqueous hydrogen peroxide in the presence of an acid, such as sulphuric acid and permitting the compositions to progress towards equilibrium concentrations. By starting with a diester, perhydrolysis generates an ester peracid which is a particularly effective peracid. The process can be controlled to produce solutions containing a high peracid content and within a wide range of ratios of ester peracid to acid peracid.