The camera calibration in monocular vision represents the relationship between pixels’ units which is obtained from a and object real world. As an essential procedure, calculates three-dimensional geometric information captured two-dimensional images. Therefore, modified method based on polynomial regression proposed to simplify. In this method, parameter vector by pixel coordinates of obstacle...

Light detection and ranging (LiDAR) technology is an active remote-sensing system used in autonomous vehicles, machine vision augmented reality. Improvements the speed signal-to-noise ratio of photodetectors are needed to meet these demanding applications. Silicon electronics have been principal option for LiDAR range 850–950 nm. However, its indirect bandgap leads a low absorption coefficient ...

Ultra-wideband (UWB) radio, a new carrierless communication scheme using impulses, is a candidate technology for future communication and ranging applications. Recent progress on both in the technical and regulatory side of this technology has made this possible. The fine time resolution and material penetration capability of UWB signals has created a vision of novel ranging and positioning app...

BACKGROUND The emergence of important viral diseases and their potential threat to humans has increased the interest in bats as potential reservoir species. Whereas the majority of studies determined the occurrence of specific zoonotic agents in chiropteran species, little is known about actual bat pathogens and impacts of disease on bat mortality. Combined pathological and microbiological inve...

A special challenge in near bottom operation of an undersea mobile robot is obtaining accurate information concerning deviations from a defined position despite the lack of a structured environment. The availability of gyro-compasses and slaved vertical gyros make the sensing of rotational motions relatively straightforward. Accuracies of ± 0. 5 degree are not difficult to achieve in roll, pitc...

Rotorcraft operating at low altitudes require navigational schemes for locating the terrain and obstacles. Due to the covert nature of missions to be accomplished, a passive navigation scheme is desirable. This paper describes the development of a passive navigation scheme combining image sequences from a vehicle mounted camera with vehlcle motion variables. Geometric properties of perspective ...

The spectrum matching and correlation characteristic are both important in the multiple-user ultrasonic ranging system. As people know, an ultrasonic ranging system, which has a bell-shaped magnitude spectrum, acts like a band-pass filter. If the spectrum of the excitation signal does not match that of the ultrasonic ranging system, some of energy cannot be transmitted by the ultrasonic system....

Wild ruminants, including deer species (cervids) have incorrectly been regarded as refractory to yew (Taxus) intoxication. This assumption has been based upon anecdotal observations of individual deer browsing on yew over time without apparent adverse effect. A single case of yew intoxication was reported in a free-ranging Norwegian moose (Alces alces) in 2008. The current report describes five...

While modern cosmology, founded in the language of general relativity, is almost a century old, the meaning of the expansion of space is still being debated. In this paper, the question of radar ranging in an expanding universe is examined, focusing upon light travel times during the ranging; it has recently been claimed that this proves that space physically expands. We generalize the problem ...

In this paper, we propose and implement a novel IDbased secure ranging protocol. Our protocol is inspired by existing authenticated ranging and distance–bounding protocols, and is tailored to work on existing Ultra Wide Band (UWB) ranging platforms. Building on the implementation of secure ranging, we further implement a secure localization protocol that enables the computation of a correct dev...