Particle Tracking Velocimetry (PTV) has become a standard technique frequently applied in flow field diagnostics ([1],[7],[8]). This article presents a novel technique which combines the strength of well known 2-D PTV with stereo calibration and correlation techniques to obtain 3D Lagrangian velocity fields. The here presented stereo correlation technique is fundamental for 3-D PTV. In addition...

On March 11, 2011, a huge tsunami caused by the Great East Japan Earthquake destroyed all the electrical power facilities in the Fukushima Daiichi nuclear power plant. As a result, the reactors were badly damaged, and radioactive particles were widely scattered in the surrounding areas. In order to study the behavior of the radioactive particles emitted from the Fukushima Daiichi nuclear power ...

Since the introduction of particle filtering for object tracking, a lot of improvements have been suggested. However, the definition of the observation likelihood function, needed for determining the particle weights, has received little attention. Because particle weights determine how the particles are resampled, the likelihood function has a strong influence on the tracking performance. We s...

This paper examines the tradeoffs between different classes of sensing strategy and motion control strategy in the context of terrain mapping with multiple robots. We consider a larger group of robots that can mutually estimate one another’s position (in 2D or 3D) and uncertainty using a sample-based (particle filter) model of uncertainty. Our prior work has dealt with a pair of robots that est...

Visual detection and target tracking are interdisciplinary tasks oriented to estimate the state of moving objects in an image sequence. There are different techniques focused on this problem. It is worth highlighting particle filters and Kalman filters as two of the most important tracking algorithms in the literature. In this paper, we presented a visual tracking algorithm which combines the p...

BACKGROUND Since 2004, treatment of Mycobacterium ulcerans disease, or Buruli ulcer, has shifted from surgery to daily treatment with streptomycin (STR) + rifampin (RIF) for 8 weeks. For shortening treatment duration, we tested the potential of daily rifapentine (RPT), a long-acting rifamycin derivative, as a substitute for RIF. METHODOLOGY/PRINCIPAL FINDINGS BALB/c mice were infected with M....

Impellers play a key role in flotation cells, as the turbulence generated through agitation aids particle suspension, air dispersion and particle–bubble collision. Therefore, it is important to understand effect that different impeller designs have on hydrodynamics, small variations could enhance performance. The study of hydrodynamics is, however, complex task due nature systems, which are opa...

We study the problem of tracking, namely, estimating the states of physical objects with time, from streams of noisy and unreliable observations. The most common model for the tracking problem is the generative model, which is the basis of solutions such as the Kalman filter and particle filters. In this paper, we consider a different formulation – an explanatory framework – for tracking, and w...

The design of future radioactive ion beam (RIB) facilities requires the forecast of radio isotope inventory after irradiation. At CERN – ISOLDE, we developed a software that estimates the activity of irradiated materials as a function of time dedicated to radioactive waste management. This tool can also be used for licensing procedures, planning of irradiation experiments and the estimation of ...