In this paper we present regions of motion and periodic orbits in the spatial elliptic restricted three body problem (ER3BP). Periodic orbits and regions of motion are fundamental keys to understand any dynamical system; for this reason the Hill’s surfaces or the families of halo orbits have been extensively studied in the frame of the circular restricted three body problem. It is our opinion t...

The coherence properties of a gas of bosonic atoms above the Bose-Einstein-condensation transition temperature were studied. Bragg diffraction was used to create two spatially separated wave packets, which interfere during expansion. Given sufficient expansion time, high fringe contrast could be observed in a cloud of arbitrary temperature. Fringe visibility greater than 90% was observed, which...

We investigated the relationship between eye movement and simple-spike (SS) frequency of Purkinje cells in the cerebellar flocculus middle zone during the optokinetic response (OKR) in alert cats. The OKR was elicited by a sequence of a constant-speed visual pattern movement in one direction for 1 s and then in the opposite direction for 1 s. Quick-phase-free trials were selected. Sixty-six cel...

This paper presents the design and performance evaluation of a set of globally asymptotically stable timevarying kinematic filterswith application to the estimation of linearmotionquantities ofmobile platforms (position, linear velocity, and acceleration) in three dimensions. The proposed techniques are based on the Kalman andH∞ optimal filters for linear time-varying systems and the explicit o...

Grid cells in the medial entorhinal cortex (MEC) are part of an environment-independent spatial coordinate system. To determine how information about location, direction, and distance is integrated in the grid-cell network, we recorded from each principal cell layer of MEC in rats that explored two-dimensional environments. Whereas layer II was predominated by grid cells, grid cells colocalized...

Recovering the 3-D motion and structure of a rigid object from image sequences is a fundamental in applications such as target recognition, issance, vision-based servoing, and computer . The main approaches to 3-D trajectory estimation have usually exploited either point features [2] or optical flow [3] independently. In feature-based approaches, 3-D motion and structure are estimated by observ...