Publicaties

Reputation is an important social construct in science, which enables informed quality assessments of both publications and careers of scientists in the absence of complete systemic information. However, the relation between reputation and career growth of an individual remains poorly understood, despite recent proliferation of quantitative research evaluation methods. Here, we develop an original framework for measuring how a publication’s ...

The significance of nodal metastasis in breast cancer is under discussion. We investigated the impact of variables of tumor chronology and tumor biology on the presence of lymph node metastases.

Plant macrofossil analysis was performed on a peat core collected from the Mozgovitsa valley in the Northwestern Pirin Mountain. The results were combined with the information from pollen analysis and radiocarbon chronol- ogy so that a detailed palaeovegetation reconstruction for the last 9500 years was presented. Betula forests with groups of various Pinus species dominated the landscape 9500-7300 years ago, while mixed deciduous Quercus ...

It is shown that every translation lightlike and every homothetical lightlike hypersurface in a semi-Euclidean space is locally a hyperplane. As a consequence, both translation and homothetical lightlike hypersurfaces are minimal.