Barry Evans

This special issue contains the best papers from the 29th and 30th Ka and Broadband Space Communications and Navigation Conference held, respectively, in Bradford, UK, and Seattle, USA, in 2023/2024.

1 Introduction Changes in intensity and duration of extreme rainfall events in New Zealand and around the world have resulted in a greater number of events exceeding the design capacities of current stormwater infrastructure (Bisht et al. 2016; Hettiarachchi et al. 2018; Le et al. 2024).

Highlights • Odor mixture encoding requires extensive modulation of odorant receptor activity • A combinatorial binding logic exists for antagonists, like agonists • Widespread antagonism increases the encoding capacity of the olfactory system • Divergent antagonism among paralogs diversifies odorant receptor repertoires Summary Most natural odors are complex mixtures of volatile components, competing to bind odorant receptors (ORs) expressed in olfactory sensory neurons (OSNs) of the nose.