V884 Her: an improved ephemeris [Observed: 2 sessions in 2018, 3 in 2017, 6 in 2016, 6 in 2015 ]
Photometric observations of the cataclysmic polar V884 Her are presented. An improved ephemeris for the eclipses is obtained.

A quick introduction to gauge theories []
An introduction to gauge theories for those already familiar with quantum mechanics. It covers the broken symmetry, the Higgs mechanism and the Weinberg-Salam model.