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The main characteristics of the average spectrum of radio quiet AGN in the UVand X-ray range are reviewed, and the emission mechanisms are discussed in theframework of accretion disk models, in particular the ``irradiated coldrelativistic disk". It is shown that some problems arise in confronting thepredictions of the model to the observations. We propose an alternative modelin terms of a hot disk surrounded by a cold Compton thick medium. Finally wemention problems with remote regions of the accretion disk.

Accretion and Emission Processes in AGN: The UV-X Connection