Capacity Models and Transmission Risk Mitigation: An Engineering Framework to Predict the Effect of Air Disinfection by Germicidal Ultraviolet Radiation.

A first-principles-based model for predicting the effect of germicidal radiation interventions for air disinfection is presented. Calculation of the "capacity" of an intervention expressed in volumetric flow rate allows for a direct comparison against fresh-air dilution ventilation and filtration systems, which are quantified in terms of the clean air provided. A closed-form expression to predict the combined quantitative impact of spatial gradients and mixing currents on the efficiency with which an intervention is applied is introduced.

The unique phenomenology of sex-linked dystonia parkinsonism (XDP, DYT3, "Lubag").

Sex-linked dystonia parkinsonism (XDP, DYT3, "Lubag") is an adult-onset, progressive, debilitating movement disorder first described in Filipino males from Panay Islands in 1975. XDP manifests predominantly as torsion dystonia, later combined with or sometimes replaced with parkinsonism. Within the Island of Panay, the prevalence rate is highest in the province of Capiz, where 1:4000 men suffer from the disorder.