Publications of Debrecen 7. (1990)
EPS SOLAR MEETING 1990 Publ.Debrecen Obs. Proper Motions in Hale Regions 18405 and 18511 (2-14 June, 4-16 August 1982) G.Csepura and I.Nagy............................... 58 Derivation of the Parameters Necessary to Determine the North Direction of a Heliogram L. Győri........................................... 60 The Kanzelhöhe Photoheliograph T.Pettauer......................................... 62 Session 2. Patterns of Activity........ 65 Invited. review: Patterns of Activity C.Zwaan............................................ 67 Oral and poster contributions: The Role of Activity Complexes in the Distribution of Solar Magnetic Fields J.I.Garcia de la Rosa and R.C.Reyes................ 80 Photometry of the Internal Structure of a Large Umbra V.Búmba, M.Sobotka and S.Simberová................. 84 Interaction between Bipolar Sunspot Groups G.Csepura, L. van Driel-Gesztelyi, I.Nagy, O.Gerlei, B.Schmieder and J.Rayrole................ 88 Solar Active Longitudes and their Possible Relation to the Regular Large-Scale Patterns of the Solar Magnetic Fields V. Búmba and L.Hejna............................... 92 Sunspot and Plage Photometry for Solar Irradiance Variations in August/September 1980 M.Steinegger, P.N.Brandt and W.Schmidt............. 96 An Investigation of Sunspot Nests during Solar Cycle No.20 B.K.Abuzeid and K.Petrovay..... 98 A Short Term Periodicity near 155 Day in Sunspot Areas M.Carbonell and J.L.Ballester....................... 100 Influence of Magnetic Fields on Temperature Inhomogeneities A.Hanslmeier and W.Mattig........................... 102 Activity Cycle Variation of Some Photospheric Lines M.Karabin, A.Kubidela, J.Skuljan and I.Vince......... 104 Changes in Residual Polarization of the Corona and the Solar Activity Cycle M.Vuletié, P.Cugnon and J.Arsenijevic............... 106 The Influence of the Granulation on the Absorption Lines I. Nonactive Regions A.Nesis, A.Hanslmeier, R.Hammer, R.Komm and W. Mattig........................................... 108