J. Kozesnik – författare

The Ninth Prague Conference on Information Theory, Statistical Decision Functions, and Random Processes was organized by the Institute of Information Theory and Automation of the Czechoslovak Academy of Sciences from June 28 to July 2, 1982. Similarly as the preceding Prague Conferences, during their twenty six years histo­ ry, it provided a space for the presentation and discussion of recent scientific results, as well as for personal contacts of many scien­ tists both from abroad and from Czechoslovakia. Nearly 150 special­ ists from 17 countries participated in the Conference and they read more than 100 papers (including 18 invited ones), 88 of which have been published in the present two volumes of the Transactions of the Conference. Namely invited papers, having been read by outstanding specialists, have brought invaluable offer for participants to create themselves an orientation in the modern trends of the above mention­ ed scientific branches. Allow us to use this opportunity to express our sincere thanks to all who have contributed to the success of the Conference, espe­ cially to those who prepared and presented papers. Our gratitude is also due to Academician Jaroslav Kozesnik, the scientific editor of the Transactions, and to the editorial board for reviewing all papers and fulfilling many printing manage­ ment duties. We would like to appreciate a great work of all colleagues from the Institute of Information Theory and Automation, who participated in the preparation and in the organization of the Conference.

During the past Prague Conferences, the Organizing Committee had to face with a great regret permanent and even increasing delays in publishing the Transactions. The delays seemed to be out of any our reach as long as the traditional manuscript delivery rules and traditional printing technique were supposed to be employed. This is why we decided, starting with this Conference, for a new method of papers collection and printing. We want to thank all participants of our conference, in particular those who contributed to the volu- mes A and B, for understanding this our step. Our thanks are due to Academician Jaroslav Koieinik, the scien- tific editor of these volumes, and to the editorial board for re- viewing all papers and fulfiling many printing management duties. We also thank Academia Publishing House for printing the whole volume in time. ORGANIZING COMMITTEE of the EIGHTH PRAGUE CONFERENCE on INFORMATION THEORY, STATISTICAL DECISION FUNCTIONS, RANDOM PROCESSES PROBLEMES LIES A LA DETERMINATION DES SPECTRES DE PUISSANCE EN THEORIE DES FONCTIONS ALEATOIRES A. Blanc-Lapierre Gif-sur-Yvette (France) ~ La dll!termination exp~rimentale du spectre de pui,ssance, au sens physique, d'une grandeur fluctuante pose des probl~mes' d'analyse spectrale et d'ergodisme.Ces deux types de probl~mes sont examin~s conjointement pour une grandeur repr~sent~e par une fonction al~atoire X(t,~), pas n~cessairement stationnaire, mais pr~sentant des caract~res de permanence suffisants pour que la puissance moyenne puisse @tre difinie.