The existence of additive conserved quantities implies, as is well known, unavoidable deviations from the ideal von Neumann scheme in the measurement of those observables which do not commute with the conserved quantities. We introduce a formal procedure which allows the derivation of a lower...

This paper investigates the influence of perceived source credibility on the effectiveness of health-related public service announcements (PSAs) and electronic word-of-mouth (eWOM) communications. Findings indicate that online commenters who are perceived to be credible are instrumental in...

In the frame of Regulation (EC) No 882/2004, the European Union Reference Laboratory for Genetically Modified Food and Feed has the duty to organise comparative testing rounds and to ensure an appropriate follow-up of these activities. This report describes the outcome of the second comparative...