There have been 10 specific "wheel-well" passenger stowaway flights (the wheel-well area was entered just before take-off) documented in the N.Y. Times between 1947-1993. Five stowaways survived flights encompassing altitudes as high as 39,000 feet, with six dying in the process (one flight had two stowaways, one fatal, one surviving). Three Douglas DC-8 and four Boeing 707 aircraft, plus a Car...

Thin shells are found in nature at scales ranging from viruses to hens' eggs; the stiffness of such shells is essential for their function. We present the results of numerical simulations and theoretical analyses for the indentation of ellipsoidal and cylindrical elastic shells, considering both pressurized and unpressurized shells. We provide a theoretical foundation for the experimental findi...

Introduction: The key to significant lunar science and exploration return lies in supplying the crews on the surface with a robust EVA capability. This capability should include high mobility pressure garments; tactile, dexterous gloves; reduced overhead in preparing for and recovering from EVAs; management of regolith contamination; and control of suit leakage to prevent planetary contaminatio...

A novel impulsive cell pressurization experiment has been developed using a Kolsky bar device to investigate blast-induced traumatic brain injury (TBI). We demonstrate in this video article how blast TBI-relevant impulsive pressurization is applied to the neuronal cells in vitro. This is achieved by using well-controlled pressure pulse created by a specialized Kolsky bar device, with complete p...

We study the formation of localized structures formed by the point loading of an internally pressurized elastic shell. While unpressurized shells (such as a ping-pong ball) buckle into polygonal structures, we show that pressurized shells are subject to a wrinkling instability. We study wrinkling in depth, presenting scaling laws for the critical indentation at which wrinkling occurs and the nu...

Mitral valve repair is a complex procedure that requires the ability to predict closed valve shape through the examination of an unpressurized, accid valve. These procedures typically include the remodeling of the mitral annulus through the insertion of an annuloplasty ring. While simulations could facilitate the planning of the procedure, traditional finite-element models of mitral annuloplast...

This paper describes the development and performance of a wideband dual linear polarization microstrip antenna array used in the Danish high-resolution airborne multifrequency polarimetric synthetic aperture radar, EMISAR. The antenna was designed for an operating frequency of 1.25 GHz 50 MHz and was built as an array of 8 2 probe-fed stacked microstrip patches. The feeding network is construct...

Food allergies to hazelnut represent an important health problem in industrialized countries because of their high prevalence and severity. Food allergenicity can be changed by several processing procedures since food proteins may undergo modifications which could alter immunoreactivity. High-hydrostatic pressure (HHP) is an emerging processing technology used to develop novel and high-quality ...

The objective of this paper is to accurately measure the vibration response tools and hands by simulating hand-held power tools, which are operated astronauts wearing extravehicular spacesuit gloves under microgravity conditions. total value daily exposure subject’s hand obtained. results show that opisthenar more sensitive frequency less than 200 Hz. After weighting, in composite state an unpr...