Josef Vrana

  • Citations Per Year
Learn More
Since July 28th, 1997 the two experimental mini-stands of young Norway spruce [Picea abies (L.) Karst.] have been grown in lamellar domes at ambient (AC) and elevated concentrations of CO2 [EC, i.e., ambient + 350 µmol(CO2) mol−1]. Before the start of exposure to EC (June 1997) the dependencies of photosystem 2 (PS2) quantum yield (Y) on irradiance,(More)
In northern Slovakia an adult male Lesser Spotted Eagle (Aquila pomarina) occupied the same nest site for 11 years running (1992–2002), where it was ringed and fitted with two satellite transmitters. In six of these years it successfully reared a young. In 1994 and 2000–2002 its behaviour during migration could be followed in detail by means of satellite(More)
G. ARNISON J, A. ASTBURY J, B. AUBERT b, C. BACCI i, G. BAUER 1, A. Bt~ZAGUET d, R. BOCK d, T.J.V. BOWCOCK f, M. CALVETTI d, p. CATZ b, p. CENNINI d, S. CENTRO d, F. CERADINI d,i, S. CITTOLIN d, D. CLINE 1, C. COCHET k, j . COLAS b, M. CORDEN c, D. DALLMAN d,1, D. DAU 2, M. DeBEER k, M. DELLA NEGRA b,d, M. DEMOULIN d, D. DENEGRI k, A. Di CIACCIO i, D.(More)
A new method of shower-image analysis is presented which appears very powerful as applied to those Cherenkov Imaging Telescopes with very high deenition imaging capability. It provides hadron rejection on the basis of a single cut on the image shape, and simultaneously determines the energy of the electromagnetic shower and the position of the shower axis(More)
The CELESTE experiment will be an Atmospheric Cherenkov detector designed to bridge the gap in energy sensitivity between current satellite and ground-based gamma-ray telescopes, 20 to 300 GeV. We present test results made at the former solar power plant, Themis, in the French Pyrenees. The tests connrm the viability of using a central tower heliostat array(More)
C. Albajar a, M.G. Albrow b, O.C. Allkofer c,l, K. Ankoviak d, R. Apsimon b, B. Aubert e, C. Bacci f, S. Bartha c, G. Bauer g, A. Bettini h, A. Bezaguet a, p. Biddulph i, H. Bohn c, A. B6hrer J, R. Bonino ", K. Bos k, M. Botlo a, D. Brockhausen ~, C. Buchanan d, B. Buschbeck ~, G. Busetto h, A. Caner h, p. Casoli h, H. Castilla-Valdez d, F. Cavanna e, p.(More)
  • 1