Volume 20 / C o n t e n t s
1. K. Panov
Welcome 1		 6
2. N. Sabotinov
Welcome 2		 7
3. Kiril Panov
 THE ROZHEN NATIONAL ASTRONOMICAL BSERVATORY: Observational Facilities,
Research Activities and possibilities for collaboration between countries from South-Eastern Europe		 9
  Aerospace research  
1. Irena Nikolova
RETURN AND PROFITABILITY OF SPACE PROGRAMS.
Information - the main product of flights in space		 15
2. Rumen Nedkov, Albena Pavlova
 ANALYSIS OF REMOTE SENSING METHODS FOR FOREST ECOMONITORING
IN DIFFERENT SEASONS		 21
3. Iliana Ilieva, Plamen Kostov, Tania Ivanova, Svetlana Sapunova
GROUND CONTROL EXPERIMENT TO STUDY THE IMPACT OF MICROGRAVITY-SPECIFIC WATER AND OXYGEN DISTRIBUTION IN SUBSTRATE MEDIUM ON PLANTS		 28
4. G.L.Gdalevich, N.Bankov, St.Chapkunov, L.Todorieva, R.Shkevov
VOLT-AMPERE CHARACTERISTICS OF A CYLINDRICAL PROBE IN THE IONOSPHERE PLASMA IRREGULARITIES REGIONS		 32
5. Rumiana Kancheva, Denitsa Borisova
CROP SPECTRAL REFLECTANCE WITH REFERENCE TO GROWING CONDITIONS		 38
6. Denitsa Borisova, Rumiana Kancheva
SPECTROSCOPY OF LUNAR AND TERRESTRIAL BASALTS		 43
7. Hristo Nikolov
NON-LINEAR APPROACH IN MULTISPECTRAL DATA CLASSIFICATION		 47
8. Doyno Petkov, George Georgiev, Hristo Nikolov
THEMATICALLY ORIENTED MULTICHANNEL SPECTROMETER (TOMS)		 51
9. Jivko Zhekov, Garo Mardirossian, Angel Manev,Kunyo Palazov, Ivan Hristov
ATMOSPHERIC ABSORPTION STRIPS' INFLUENCE ON OPTICAL PYROMETERS’ WORK
IN THE INFRARED SPECTRAL RANGE		 55
  Galaxies  
1. Luba Slavcheva-Mihova, Georgy Petrov, Boyko Mihov
MULTICOLOUR SURFACE PHOTOMETRY OF SEYFERT GALAXIES: FIRST RESULTS		 60
2. Nedelia Antonia Popescu, Marian Doru Suran
EXTREMELY RED GALAXIES AT z~1		 66
3. Vasile Mioc, Badaoui,Elmabsout, Magda Stavinschi
EXOTIC ESCAPE DYNAMICS IN HÉNON-HEILES’ MODEL		 72
4. Marian Doru Suran
PMS versus Post-MS		 78
5. Evgeni Ovcharov and Petko Nedialkov
DISTANCE MODULUS OF THE DWARF GALAXY IC10		 85
6. Rovithis-Livaniou H.
THE GRAVITY DARKENING EFFECT: FROM VON ZEIPEL UP TO DATE		 90
7. E. Semkov, R. Bachev, A. Strigachev
SPECTRAL OBSERVATIONS OF BRIGHT QUASARS AT NAO ROZHEN		 99
8. Ivan Valtchanov
EXPLORING THE HIGH REDSHIFT LARGE-SCALE STRUCTURE OF THE UNIVERSE:
A MULTI-WAVELENGTH PERSPECTIVE		 102
9. P. Nedialkov, A. Valcheva, T. Veltchev, I. Stanev, Ch. Dyulgerov , A. Kostov
EXTINCTION STUDIES IN M31		 113
10. G. Petrov, A.Y. Kniazev, J.W. Fried
STUDIES OF SELECTED VOIDS. SURFACE PHOTOMETRY OF FAINT GALAXIES IN THE DIRECTION OF 1600+18 IN HERCULES VOID		 120
11. L. Č. Popović, K. Y. Stavrev, K. Tsvetkova, M. Tsvetkov, D. Ilić, S. F. Sanchez, G. M. Richter
MRK 1040 AND ITS COMPANION LEDA 212995		 126
12. Tsvetan Georgiev
THE RADIAL BRIGHTNESS PROFILES OF THE GALACTIC DISKS		 131
13. T. B. Georgiev, I. Y. Georgiev1, N. A.Koleva, P. L. Nedialkov, O .I. Stanchev
ANALYSIS OF THE COLOR-MAGNITUDE DIAGRAMS
OF THE DWARF GALAXIES UGCA 105 and UGCA 86		 138
14. T.B. Georgiev, I.Y. Georgiev, N.A. Koleva, P.L. Nedialkov, O.I. Stanchev
DECOMPOSITION OF THE PROFILES OF 20 GALAXIES		 145
15. Ivana Damjanov, Milan M. Ćirković
STAR FORMATION TIMESCALES IN SPIRAL GALAXIES		 153
  Stellar Physics  
1. Maria Dimitrova
THREE DIMENSIONAL NUMERICAL MODEL OF ACCRETION FLOW IN CLOSE BINARY –
PROBLEM DEFINITION		 161
2. Krasimira Iankova, Lachezar Filipov
INFLUENCE OF THE MAGNETIC FIELD OF THE COMPACT OBJECT
ON THE ACCRETION DISK – RESULTS		 167
3. Haralambi Markov
TOWARDS IMPROVING THE QUALITY OF STELLAR PHOTOMETRY -
SPATIALLY DEPENDENT ERRORS IN STELLAR MAGNITUDES		 171
4. P. Duchlev, K. Koleva, M. Dechev, J. Kokotanekova, N. Petrov
DYNAMIC CHARACTERISTICS OF THREE ERUPTIVE PROMINENCES		 176
5. Ilian Iliev, Ivanka Stateva, Ernst Paunzen, Ina Barzova
PASCHEN LINES SURVEY OF LAMBDA BOOTIS TYPE STARS		 183
6. Ilian Iliev, Marian Fenovcik, Jan Budaj, Ina Barzova
HIGH-RESOLUTION SPECTROSCOPY AT ROZHEN:
HUNT FOR SB2 MARKS IN THE SPECTRA OF AM BINARIES		 187
7. Kosmas Gazeas, Panagiotis Niarchos
CCD PHOTOMETRIC STUDY OF THE OVERCONTACT ECLIPSING BINARY SYSTEM V1363 Ori		 193
8. J. Kubat, J. Krticka
HEATING IN THE STELLAR WINDS OF HOT STARS		 199
9. Panagiotis Niarchos
PHYSICAL PARAMETERS FOR STARS IN CLOSE BINARY SYSTEMS		 206
10. D. P. Dimitrov, K. P. Panov
THE FLARE ACTIVITY OF YZ CMi in 1999 – 2004		 214
11. D. P. Dimitrov, K. P. Panov
LONG-TERM PHOTOMETRIC INVESTIGATION of FK Com		 218
12. Daniela Andreeva, Lachezar Filipov
BIFURCATION SOLUTIONS OF VORTICAL TRANSPORT EQUATION PARAMETERS,
AS A MECHANISM OF DETECTING AN INSTABILITY IN THE ACCRETION DISCS		 224
13. Nevena Markova ,Haralambi Markov
MASS-LOSS AND WIND MOMENTUM RATES OF HOT LUMINOUS STARS.
THE EFFECTS OF WIND CLUMPING AND VARIABILITY IN GALACTIC O-TYPE STARS		 230
14. A. Dumitrescu, M.D. Suran, L. Iliev, V. Tudose
ECLIPSING BINARY SYSTEM V376 And: OBSERVATIONS AND SOLUTIONS		 238
15. Rovithis-Livaniou H., Tsantilas S., Kalimeris A., Rovithis P.
ORBITAL PERIOD CHANGES OF THE ECLIPSING BINARIES OO Aquilae and V471 Tauri		 243
16. Osman Demircan
ANGULAR MOMENTUM EVOULUTION OF INTERACTING BINARY STAR SYSTEMS		 248
17. Nikolai Tomov, Mima Tomova, Olga Taranova
THE ACTIVITY OF THE SYMBIOTIC BINARY Z AND AT THE END OF 2002		 252
18. Lubomir Iliev
NEW AIMS OF THE SPECTRAL RESEARCH OF BE-STARS		 258
19. Petre Popescu, Alin Nedelcu, Radu Popescu, Octavian Bădescu
ASTROMETRY WITH SMALL INSTRUMENTS		 265
20. G. Djurašević, H. Rovithis-Livaniou, P. Rovithis, N. Georgiades and S. Erkapić
GRAVITY-DARKENING IN SEMI-DETACHED BINARY SYSTEMS TW And, TW Cas, AI Dra and UX Her		 273
  Solar System  
1. M. Dechev, P. Duchlev, K. Koleva and N. Petrov
HELICAL INTERNAL STRUCTURES IN ERUPTIVE PROMINENCES		 280
2. K. Koleva, P. Duchlev, J. Kokotanekova and M. Dechev
AN ACTIVITY PATTERN OF AR NOAA 9026 DURING THE LAST HALF OF ITS EVOLUTION		 287
3. V. Guineva, R. Werner, P. Stoeva
CARBON-CONTAINING NEUTRALS AND THEIR SPATIAL DISTRIBUTION
IN THE HALLEY COMET COMA		 292
4. R.Werner, A.Hempelmann, D.Valev, I. Kostadinov, At.Atanassov,
G.Giovanelli, A.Petritoli, D.Bortoli, F.Ravegnani
WAVELET ANALISYS OF THE SOLAR ROTATIONAL ACTIVITY VARIATIONS		 299
5. Nikolay Erokhin, Vladimir Damgov , Liudmila Mikhailovskaya
ON THE SOLAR ACTIVITY AND EARTH ATMOSPHERE
LARGESCALE VORTICAL PROCESSES COUPLING		 309
6. Gordana Apostolovska, Violeta Ivanova, Galin Borisov and Bonka Bilkina
CCD PHOTOMETRY OF ASTEROIDS
AT ROZHEN NATIONAL ASTRONOMICAL OBSERVATORY FROM 2001 TO 2003		 314
  Others  
1. Veselka Trajkovska and S. Ninkovicnguelov
RADOSAV VASOVIC (1868-1913) ON THE BELGRADE OBSERVATORY		 323
2. Veselka Trajkovska
ON A DOCUMENT CONCEERNING THE CALENDAR REFORM		 328
3. Veselka Trajkovska
ON THE FUNDAMENTAL CONTRIBUTION OF MAKSIM TRPKOVIC'S PROJECT
TO THE PAN-ORTHODOX SOLUTION OF THE CALENDAR REFORM IN CONSTANTINOPLE IN 1923		 158
4. Vesselina Koleva, Iliya Georgiev
A WOODEN CALENDAR FROM SOUTHEASTERN BULGARIA		 341
5. Tsvetan Georgiev
LIFE STANDARD, SCIENCE AND ASTRONOMY		 347
6. Nikolai Sivkov
A THRACIAN LUNISOLAR CALENDAR		 353
7. Vladimir Damgov, Nikolay Erokhin, Plamen Trenchev
CLASS OF INHOMOGENEOUSLY DRIVEN DYNAMICAL SYSTEMS:
GENERAL THEORY, REGULAR AND CHAOTIC PROPERTIES		 360
8. Kiril Panov
THE ROZHEN NATIONAL ASTRONOMICAL OBSERVATORY: OBSERVATIONAL FACILITIES, RESEARCH ACTIVITIES AND POSSIBILITIES FOR COLLABORATION
BETWEEN COUNTRIES FROM SEE		 365