Directional response of structures to thunderstorm outflows

Thunderstorm outflows preceding epidemics of asthma during spring and summer.

BACKGROUND A study was undertaken to assess the importance of thunderstorms as a cause of epidemics of asthma exacerbations and to investigate the underlying mechanism. METHODS A case control study was performed in six towns in south eastern Australia. Epidemic case days (n = 48) and a random sample of control days (n = 191) were identified by reference to the difference between the observed ...

Outflows Near An Accreting Black Hole: Ionization and Temperature Structures

We calculate the temperature and ionization balance in an outflow from an accreting black hole under illumination by hard radiation from the central object. Electron scattering of the FeKα photons within the highly ionized expanding flow leads to a decrease of their energy (redshift) which is of first order in v/c, when v is the outflow velocity (v is much less than the speed of light c). This ...

Transient response of severe thunderstorm forcing to elevated greenhouse gas concentrations

A severe thunderstorm climatology for Australia and associated thunderstorm environments

Effect of earthquake directional uncertainty on the seismic response of jacket-type offshore platform

In the seismic risk assessment of structures, two main random variables are involved, namely the vulnerability of the structure and the seismic action. The aim of the study presented here is to analyze the seismic behavior of the jacket-type offshore platforms as an expensive and vital structure. Furthermore, the influence of the incidence angle of the seismic action is also investigated by usi...