Abstract: A process and a device transmits numerical data in the form of a sequence of words. The process includes an encoding phase, a transmission stage and a decoding phase. In the encoding phase, the data creates an analog signal whose period is composed of several fractions of the period, each one depending on a word of the data. The analog signal is transmitted. In the decoding phase, the signal is divided into p fractions corresponding to the encoding fractions, and the fractions are analyzed to deduce the sequence of words. The process permits a high flow of transmission for a particular transmission band width.

Abstract: A process for simultaneously checking the authenticity of information media and the authenticity of the information itself which involves scanning a portion of the information written on the media. The results of the scan are transformed into an electrical signal. The signal is analyzed by an appropriate algorithm that registers variations between the information as actually written and a theoretically perfect writing of the same information. The results of this analysis can be stored in the memory of the scanning apparatus or directly onto the media. Then each time the media is handled, the same section of information is rescanned, identically analyzed, and compared to the stored results of the initial scan.

Abstract: A substance with therapeutic applications comprises, in aqueous solution:(1) at least one organo-silicon compound having either of the following formulas: ##STR1## in which: n is an integer between 1 and 1000, and preferably between 1 and 50;p, q, r are integers between 0 and 1000, and preferably between 0 and 60;R and R' represent, independently of one another, a linear aliphatic group, branched or cyclic, saturated or not, hetero-linear branched or not, cyclic saturated or not, aromatic, heteroaromatic, arylaliphatic, or heteroarylaliphatic, which may also be functional, whilst R may also be OH, OR or OSiR.sub.3 ;.SIGMA. is R, H or SiR.sub.3, where R is as previously defined;.SIGMA.' is R and more particularly CH.sub.3, OR, OH or OSiR.sub.

Abstract: A process controlling the use of a document reserved to the titleholder along or to the authorized bearer, and is characterized by consisting prior to the activation of the document in integrating into a predetermined zone of the document a predetermined and random coded transcription of a set of letters and/or digits constituting a secret "word" known only to the titleholder, the coded data being spread across a matrix of n rows and p columns, in comparing at the time the document is used the coded data with a "word" issued by the document bearer following the transcription in the same code, and in determining and displaying whether in there is coincidence or not.The process applies in particular to checks or the like. The invention also relates to the documents and the coding and reading means designed or developed to implement this process.