Asymmetric neutrino Yukawa matrices and neutrino mixing

We study leptonic CKM mixing matrices when the neutrino Yukawa matrices are antisymmetric which gives rise to mass patterns suitable to explain solar, atmospheric and LSND neutrino oscillation experiments. Taking diagonal leptonic matrices which can give rise to hierarchical lepton masses, we compute the leptonic CKM matrix.Comment: version to appear in Phys. Rev.

Quasi-degenerate neutrinos from an abelian family symmetry

We show that models with an abelian family symmetry which accounts for the observed hierarchies of masses and mixings in the quark sector may also accomodate quasi-degeneracies in the neutrino mass spectrum. Such approximate degeneracies are, in this context, associated with large mixing angles. The parameters of this class of models are constrained. We discuss their phenomenological implications for present and foreseen neutrino experiments.Comment: 24 pages, late

Neutrino Anti-neutrino Transitions

We consider transitions between neutrinos and anti-neutrinos in laboratory experiments in five scenarios, including both helicity flipping and preserving cases.Comment: 16 pages, 2 tables, LaTe

Neutrinos Properties Beyond the Standard Model

The present observational status of neutrino physics is sketched, with emphasis on the hints that follow from solar and atmospheric neutrino observations, as well as dark matter. I also briefly review the ways to account for the observed anomalies and some of their implicationsComment: 14 pages. Latex. 12 figures. Plenary talk, WIN97, Capri, Italy, June 1997. Minor changes, references and acknowledgements adde

Editoria - Special Issue - Medical Informatics Europe 2000 (MIE2000)

This special issue contains a selection of papers presented at Medical Informatics Europe 2000 (MIE2000), organised by the European Federation for Medical Informatics (EFMI) and excellently hosted by the German Association for Medical Informatics, Biometry and Epidemiology (GMDS). The complete proceedings of the conference have been published by IOS Press, Amsterdam (Studies in Health Technology and Informatics, vol. 77). The chairpersons of the sessions selected a number of presentations that because of their quality would be appropriate for publication in a special issue of our journal. The authors were invited to submit extended versions of their paper, which then went through the normal reviewing process. This special issue covers quite a number of different medical informatics subjects. Electronic patient records, decision support, management issues, evaluation, standardisation, organisational issues, technical issues and signal and image processing are discussed. The guest editors consider the contributions of outstanding quality and representative of the research in medical informatics performed today in Europe