Catastrophic Instability in Aeroplanes

Rayleigh-Taylor Instability in Elastoplastic Solids: A Local Catastrophic Process.

We show that the Rayleigh-Taylor instability in elastoplastic solids takes the form of local perturbations penetrating the material independently of the interface size, in contrast with the theory for simple elastic materials. Then, even just beyond the stable domain, the instability abruptly develops as bursts rapidly moving through the other medium. We show that this is due to the resistance ...

Risk of measles transmission on aeroplanes: Australian experience 2007-2011.

OBJECTIVE To quantify the risk of transmission of measles associated with infectious people who travelled on aeroplane flights to or within Australia. DESIGN, SETTING AND SUBJECTS Data were obtained from state and territory health authorities on all measles notifications from January 2007 to June 2011 for people who were likely to have been infectious or infected while travelling on aeroplane...

Taking young children on aeroplanes: what are the risks?

Determination of Catastrophic Health Expenditures among Elderly People in Iran

Background and Aim: Given the rising trend of ageing and the vulnerability of the aged group to diseases and health costs, it is important to determine the exposure of elderly households to the burdensome costs of health. Materials and Methods: The incidence and severity of elderly costs at provincial level and income quintiles were calculated; besides, chi-square test was used to determine th...

The Place of Health Insurance in Reducing Catastrophic Health Expenditure

This paper was aimed to investigate the mixed empirical results on the effect of health insurance in reducing the risk of catastrophic health expenditure (CHE). We investigated a wide range of factors affecting the risk of CHE among patients admitted to hospitals in Tehran. We categorized hospitals into five groups from private hospitals to charity ones. The data used herein was extracted from ...