Random encounter models can be used to estimate population abundance from indirect data collected by non-invasive sampling methods, such as track counts or camera-trap data. The classical Formozov-Malyshev-Pereleshin (FMP) estimator converts track counts into an estimate of mean population density, assuming that data on the daily movement distances of the animals are available. We utilize gener...

One of the most important factors influencing the track maintenance is the transitions between parts of the track with different vertical stiffness. The dynamic...

this paper deals with the threshold radius that warrants the use of single restraining rail for transit and railroads. different railways use different threshold radius from 91m to 365m to provide restraining rail. these threshold figures are probably experience driven choices. the need for restraining rail may be related to a so-called derailment alarm coefficient of 1.2 sustained over 2m leng...

To sustain market shares in the highly competitive data storage industries, continual improvements in servo performance of Hard Disk Drives (HDDs) are essential. With tight scheduling of the servo-mechanical design and evaluation cycle, an efficient integrative simulation platform is needed to evaluate and conduct fast verification of target specifications. In this paper, we propose a simulatio...

A multitarget tracking algorithm, based on representing the set of target states and the set of measurements as realisations of finite random sets, is proposed. A measurement model allowing for missed detections and false returns and a motion model allowing for target death are defined. Target births are incorporated by combining the existing track set at the prior scan with a set of proposed b...

Ground borne vibration in buildings due to railway traffic is a major concern in densely built up areas. In practice, railway induced vibration is often predicted by means of empirical methods such as the Detailed Vibration Assessment developed by the U.S. Federal Railroad Administration (FRA). The vibration velocity level in the free field is predicted based on a separate characterization of t...

Introduction As track density in tape recording systems increases, the need for high performance control becomes crucial due to significant high frequency disturbances such as lateral tape motion, inner track variability, servo track variability, noise and input saturation of the servo actuator. An essential step in designing high performance model based controllers is the identification of low...

A fast ion can electronically excite a solid producing a track of damage, a process initially used to detect energetic particles but now used to alter materials. From the seminal paper by Fleischer et al. [Phys. Rev. 156, 353 (1967)] to the present, "Coulomb explosion" and thermal spike models have been often treated as competing models for describing ion track effects. Here molecular dynamics ...