A low cross-polarization slot array antenna in the narrow wall of ridge waveguide is presented. A non-angled slot which is created in the narrow wall of the ridge waveguide is considered to be used as radiating resonant slot. The normalized resistance and normalized reactance curves are presented for design purposes. A six element slot array waveguide antenna with ridges on its narrow wall is t...

Oral argumentation skills have become a ‘hot topic’ within pragmatic language acquisition research as well didactical research. In this study, we first discuss characteristics specific to oral which, compared written argumentation, has its own mediality and therefore requirements. To reconstruct different levels of school children in grades 2, 4 6, collected corpus 180 peer discussions without ...