Abstract. The basic question of this paper was, whether a detected anomaly found in the ground during an explosives disposal process is actually a non-detonated bomb or non-dangerous metallic scrap.
Based on a borehole radar, an approach is to be presented in which first a 2-dimensional contour of the object is created with the aid of a spatial runtime evaluation.
By repeating this step at different depths with subsequent graphic overlay, a 3D shape of the buried object is created.
The method is first tested using a simulation model with inhomogeneous soil.
In the second step the method will be applied and evaluated using a field measurement of a real object.
The results shows that both 2D and 3D evaluations reflect the position and orientation of the object.
Furthermore, the shape and the dimensions can be estimated, with the restriction that the 3D contour has distortions along the vertical axis.
The aim of this work is to show an application of borehole radar, with which the identification of buried objects should be facilitated.
Abstract. Measuring respiratory parameters like the breathing
frequency or the tidal volume is essential in intensive care to ensure an
optimal and lung protecting ventilation. A common practice in artificial
ventilation of sensitive patients like infants or neonates is the use of
uncuffed endotracheal tubes in combination with continuous positive airway
pressure (CPAP). This comes with the disadvantage of an unknown leakage
making it difficult to detect spontaneous breathing or to measure the tidal
volume reliable. A novel non-obstructive method to determine respiratory
parameters as well as dynamic changes of thoracic parameters has recently
been presented and uses a pair of coupled UHF (ultra high frequency)
antennae. In this paper, a respective setup is investigated numerically
using finite difference time domain method and experimentally using an
artificial lung phantom. Both approaches show that the investigated method
seems capable of allowing a contactless triggering to synchronize natural
and artificial breathing. The results are compared to derive a better
understanding of influencing factors and opportunities for an optimisation.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.