Abstract The work presents an application that enables the calculation of basic geometric dimensions parachutes used in sounding rocket recovery systems. Determining geometry parachute canopy, based on equation aerodynamic drag, which allows to obtain object drop velocity declared by user. developed also visualization canopy selected according specific requirements mission. key element is possi...

The recent rapid development of cardiac surgery now demands accurate diagnosis of the rarer types of congenital heart disease; the exact anatomy of congenital valve stenosis, for example, must be determined. The occurrence of valvar, subvalvar, and supravalvar forms of either aortic or pulmonary stenosis is well known. With respect to congenital mitral stenosis, a rarer cardiac anomaly, we are ...

The recent rapid development of cardiac surgery now demands accurate diagnosis of the rarer types of congenital heart disease; the exact anatomy of congenital valve stenosis, for example, must be determined. The occurrence of valvar, subvalvar, and supravalvar forms of either aortic or pulmonary stenosis is well known. With respect to congenital mitral stenosis, a rarer cardiac anomaly, we are ...

BACKGROUND We assessed the frequency and types of ankle fractures that frequently occur during parachute landings of special operation unit personnel and analyzed the causes. METHODS Fifty-six members of the special force brigade of the military who had sustained ankle fractures during parachute landings between January 2005 and April 2010 were retrospectively analyzed. The injury sites and f...

The Mars parachute flight environment is supersonic, low-density, and low dynamic pressures. To ensure the operating performance reliability, design optimization verification of Tianwen-1 have been carried out. Firstly, through supersonic subsonic wind tunnel tests, structure realized. Subsequently, high-altitude tests four parachutes were conducted, drag coefficient oscillation angle from to s...

ICT could be a powerful tool for development, but how appropriate are developed-world HCI methods? Should we 'parachute in' foreign methods, do we have more to learn than to teach?

PURPOSE Penile carcinoma is a rare but mutilating malignancy. In this context, partial penectomy is the most commonly applied approach for best oncological results. We herein propose a simple modification of the classic technique of partial penectomy, for better cosmetic and functional results. TECHNIQUE If partial penectomy is indicated, the present technique can bring additional benefits. D...

Parachute, or colonial, science is increasingly becoming a hot topic of discussion across scientific disciplines (e.g., de Vos, 2020; Stefanoudis et al., 2021), as we collectively seek to understand and improve the globalization science. Parachute conservation at critical crossroads, recognize how wealth opportunity disparity, along with enduring long shadow colonialism, hinders our progress on...