Volume 9 / C o n t e n t s
1. Rolf Verner
PLASMA STUDIES BY THE HELP OL LONGITUDINAL IMAGES		 3
2. Vladimir Damgov
SOLAR WIND SENSORS: A METHOD OF INCREASE IN SENSITIVITY 		6
3. Stefan Chapkanov
ON THE PROBE EQUIPMENT OPERATION IN ACTIVE SPACE EXPERIMENT CONDITIONS		 17
4. Garo Mardirossian, Rumjana Kancheva
A DEVICE LOR MEASUREMENT OF THE REFLECTION INDICATRESS		 21
5. Jivko Jckov, Doroteja Ivanova, Vasil Zachariev, Angel Christov
ATMOSPHERIC TOTAL OZONE CONTENT VARIATION IN THE NORTH-EASTERN REGION
OF BULGARIA 		29
6. Tomas Zdravev, Dora Krezhova, Dojno Pefkov
A METHOD FOR MATHEMATICAL MODELLING OF LINEAR SYSTEMS FOR AUTOMATIC CONTROL 		33
7. Yulika Simeonova
SOME CHARACTERISTICS OF MICROCHANNEL PLATES FUNCTIONING IN THE CONDITIONS
OF A LABORATORY EXPERIMENT 		38
8. Volodia Nikolov
METHOD FOR DETERMINATION OF THE CROSSWISE WINGS AERODYNAMIC CHARACTERISTICS AT FLYING SUBSONIC VELOCITY THROUGH THE WING SPATIAL WHIRLWIND SCHEMATISATION 		43
9. Volodia Nikolov
THE RESEARCH OF THE OPERATION ORGANS STATIONARY AND NON-STATIONARY CHARACTERISTICS OF THE FLYING MACHINES AT SUBSONIC VELOCITY THROUGH
THE WHIRLWIND METHOD 		55
10. Dimitar lordanov, Yulika Sirneonova, Anton Shopov
USING THE METHOD OF ELECTRONIC SPECTROSCOPY (AES) FOR THE ANALYSIS OF CRACKS ON THE BODY OF AIRCRAFT ENGINES 		69
11. Vladimir Gochev
INFLUENCE OF THE TECHNICAL AND EXPLOITATION CHARACTERISTICS OF THE AIRPLANE
ON ITS EXPLOITATION COSTS 		75
12. Angel Genchev
A CAPACITIVE-DIOD VOLTAGE TRANSFORMER		 88
  New books
  
  FPROM SPACE AGAINST ECOLOGICAL DISASTERS 93
  In memoriam  
  ACAD. KIRIL SERAFIMOV (24.V.1932 - 2.IV.1993) 95