For analyzing the flow field and topological structure of hemispherical parachute in low angles of attack, a fluid-structure interaction (FSI) simulation technique is established to decide the shape of the hemispherical parachute during terminal descent. In the fluid simulation, the semi-implicit method for pressure-linked equations consistent (SIMPLEC) algorithm is introduced to solve shear st...

Military parachuting is perceived to be a 'high risk' activity. The estimate of risk should be based on a comparison of injury rates between soldiers who are military parachutists and soldiers who are not military parachutists rather than the rate of injury per parachute descent. Since other aspects of military life also have an inherent risk of injury the risk attributable to military parachut...

OBJECTIVE To evaluate the efficacy and safety of the surgical technique called the "parachute technique, as applied to adult patients who suffered displaced and unstable two or three-part fractures of the proximal humerus, through the clinical outcomes. METHODS Between January 1995 and June 2006, 59 adult patients with displaced and unstable two or three-part fractures underwent operations pe...

Computational fluid dynamic studies of 3-D, fixed geometry, gore-shaped parachute canopies are presented. Both solid and ribbon canopies with a 10% vent diameter are investigated. The flowfields analyzed are laminar and compressible, broaching both the subsonic and supersonic regimes. Results presented include characterization of the local and global flowfields and the internal and external can...

A parachute deformity of the tricuspid valve occurred in a heart with atrioventricular concordance, double outlet right ventricle, and straddling mitral valve. Although to the best of our knowledge parachute deformity of the tricuspid valve has not previously been reported, in this case its presence was insignificant in relation to the other lesions.

A study was undertaken to examine the type, location, incidence and mechanism of injury sustained by amateur parachutists in Denmark during a five-year-period. A total of 110,000 parachute jumps resulted in six (0.005%) fatalities and 155 (0.14%) cases, requiring medical treatment. The latter group sustained 176 injuries of which 36.9% were significant soft tissue lesions and 63.1% fractures. L...

Background: Left ventricular (LV) dilatation and remodeling following acute myocardial infarction increases wall stress, ventricular volumes and leads to heart failure (HF), which is associated with a high mortality. Percutaneous ventricular restoration (pVR) therapy reduces LV volumes leading to a more effective ejection. This study investigated the hemodynamic effects of LV volume reduction f...

The results of investigation in 5 children with congenital deformities of the mitral valve region characteristic of the 'parachute mitral valve complex' were reviewed. Three patients had parachute mitral valve, i had supravalvar mitral ring, and i had both these lesions. Associated anomalies included ventricular septal defect, double outlet right ventricle, subaortic stenosis, bicuspid aortic v...

Headquarters 23 Parachute Field Ambulance RAMC, Rhine Barracks, Aldershot, Hampshire GUll 2AX • Introduction In 1984 the Government announced the enhancement of 5 Airborne Brigade (5 AB Bde) for operations outside the NATO area (Out of Area or OOA operations)!. These enhancements included the .. addition of a medical unit (a field ambulance formed from the expansion of the existing Parachute Cl...

This paper presents an algorithm to estimate unknown parameters of parachute models from flight-test data. The algorithm is based on the simultaneous-perturbation-stochastic-approximation method to minimize the prediction error (difference between model output and test data). The algorithm is simple to code and requires only the model output. Analytical gradients are not necessary. The algorith...