[A woman with unilateral flushing of her face]. / Een vrouw met een unilateraal rood gezicht.

A 42-year-old woman had symptoms of unilateral flushing and sweating of her face during exercise. The clinical diagnosis was 'harlequin syndrome'. This condition is caused by a defect of the sympathetic nervous system and is in most cases idiopathic.

Linear embedding via Green's operators: a modeling technique for finite electromagnetic band-gap structures.

We propose a modular electromagnetic modeling procedure for large finite electromagnetic band-gap (EBG) structures, called linear embedding via Green's operators. It is a diakoptic method based on the Huygens-Schelkunoff principle involving equivalent boundary current sources that electromagnetically characterize the enclosed domain of arbitrary shapes, as if it were a multiport system. In a cascade of embedding steps, separate reusable domains are combined to form larger domains. Device design often involves tuning local medium properties in a compact designated domain with a large environment. Through an additional embedding step the equivalent sources describing the environment can be transferred to the boundary of the designated domain, rendering subsequent design steps very fast. This two-stage optimization process is applied in the design of an EBG power splitter.